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1. Reação de híbridos de milho a mancha foliar de Phaeosphaeria

Author

Armando Correa Pacheco, Luiz Carlos Vieira, Djalma Rogério Guimaraes, and Telmo Canton

Subjects
Phaeosphaeria, Zea mays, resistência, Agriculture (General), S1-972
Abstract

A mancha foliar causada por Phaeosphaeria é a mais recente doença do milho (Zea mays), que tem chamado a atenção devido a sua alta frequência de ocorrência e severidade, na grande maioria das cultivares. A incidência dessa doença é considerada como importante fator de redução de produtividade. Foram comparadas a intensidade da doença e a produtividade de nove genótipos de milho, sendo que os mais produtivos apresentaram reação de resistente a moderadamente resistente. As observações no Oeste de Santa Catarina indicam que as semeaduras realizadas no final da epoca recomendada (novembro) tem apresentado infecções precoces, produzindo geralmente níveis elevados da doença. As condições climaticas que favorecem o desenvolvimento dessa doença estão relacionadas com alta precipitação de chuvas e temperaturas noturnas relativamente baixas. Diversos trabalhos evidenciam que existe comportamento diferenciado entre cultivares em relação a esta doenqa. Estes trabalhos avaliaram 29 genotipos de milho para reação a mancha foliar de Phaeosphaeria, classificando-os entre suscetfveis a resistentes. Por isso, o uso de cultivares resistentes e considerado o metodo de controle mais importante e promissor. O objetivo deste trabalho foi avaliar, em condições naturals de campo, a reação de cultivares de milho para mancha foliar de Phaeosphaeria.

Published
2023

2. Qualidade sanitária do milho em Santa Catarina no período 1994-99

Author

Armando Correa Pacheco

Subjects
Zea, podridão de semente, Agriculture (General), S1-972
Abstract

O objetivo deste trabalho foi avaliar o comportamento das safras de milho no período 1994/99 com relação à qualidade sanitária dos grãos, medida em porcenta­gem de grãos ardidos, bem como alertar para a necessidade de mu­danças nos sistemas de produção, visando a maximização do uso dos fatores que previnam e/ou redu­zam os riscos de epidemias de podridões de espigas de milho.

Published
2021

3. Development of a Spanish version of the parent attitudes about childhood vaccines survey

Author

Rachel M. Cunningham, G Brady Kerr, Jessica Orobio, Flor M. Munoz, Armando Correa, Natalie Villafranco, Ana C. Monterrey, Douglas J. Opel, and Julie A. Boom

Subjects
vaccine hesitancy, vaccine, parental attitudes about childhood vaccines survey, spanish translation, Immunologic diseases. Allergy, RC581-607, Therapeutics. Pharmacology, RM1-950
Abstract

The Parent Attitudes about Childhood Vaccines (PACV) survey is a validated instrument for identifying vaccine-hesitant parents; however, a Spanish version is not available. Utilizing the WHO framework for translating survey instruments, we used an iterative process for developing the Spanish PACV that included forward translation, expert panel review, back translation and pre-testing that utilized cognitive interviewing. We made revisions to the Spanish PACV at each step, focusing on addressing inclusivity, readability, clarity and conceptual equivalence. The expert panel was comprised of 6 Spanish-speaking medical and research professionals who worked alongside 3 study team members. Pre-testing was conducted using convenience sampling of Spanish-speaking parents (N = 35) who had a child receiving care at the residents’ continuity clinic at Texas Children’s Hospital. Most pre-testing participants were married (80.6%), mothers (97.1%), ≥30 years of age (88.2%) and had a high school education or less (70.6%). While the majority of participants stated the survey was easy to complete, the translation of 5 PACV items was further revised to improve interpretability. We conclude that the final Spanish PACV is conceptually equivalent and culturally appropriate for most Hispanic populations.

Published
2019
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4. Prolonged Detection of Zika Virus in Vaginal Secretions and Whole Blood

Author

Kristy O. Murray, Rodion Gorchakov, Anna R. Carlson, Rebecca Berry, Lilin Lai, Muktha Natrajan, Melissa N. Garcia, Armando Correa, Shital M. Patel, Kjersti Aagaard, and Mark J. Mulligan

Subjects
Zika virus, viruses, infection, traveler, PCR, virus isolation, Medicine, Infectious and parasitic diseases, RC109-216
Abstract

Infection with Zika virus is an emerging public health crisis. We observed prolonged detection of virus RNA in vaginal mucosal swab specimens and whole blood for a US traveler with acute Zika virus infection who had visited Honduras. These findings advance understanding of Zika virus infection and provide data for additional testing strategies.

Published
2017
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5. Understanding the performance of a pan-African intervention to reduce postoperative mortality: a mixed-methods process evaluation of the ASOS-2 trial

Author

Nicola Vickery, Timothy Stephens, Leon du Toit, Dawid van Straaten, Rupert Pearse, Alexandra Torborg, Lucy Rolt, Mariechen Puchert, Graham Martin, Bruce Biccard, Bruce M. Biccard, Maia Lesosky, Tim Stephens, Landon Myer, Agya BA. Prempeh, Hyla-Louise Kluyts, Akinyinka Omigbodun, Adesoji Ademuyiwa, Muhammed Elhadi, Mohamed Elfagieh, Bernard Mbwele, Mpoki Ulisubisya, Lazaro Mboma, Daniel Z. Ashebir, Mahlet Tesfaye Bahta, Mohammed Hassen, Mikiyas Teferi, Yakob Seman, Eugene Zoumenou, Adam Hewitt-Smith, Janat Tumukunde, Dolly Munlemvo, Atilio Morais, Apollo Basenero, Pisirai Ndarukwa, Nazinigouba Ouerdraogo, Maman Sani Chaibou, Mohyeddine Zarouf, Ahmed Rhassane El Adib, Veekash Gobin, Zimogo Sanogo, Youssouf Coulibaly, Zipporah Ngumi, Tarig Fadalla, Cynthia Iradukunda, Vénérand Barendegere, Isaac O. Smalle, Mustapha Bittaye, Ahmadou Lamin Samateh, Mahmoud Elfiky, Maher Fawzy, Wakisa Mulwafu, Vanessa Msosa, Lygia Lopes, Akwasi Antwi-Kusi, Hamza D. Sama, Patrice Forget, Rupert M. Pearse, Marichen Puchert, Kris Schwebler, Freddy Kabambi, Tebogo Mabotja, Leandys Cobas, Albino Freitas, Maria Antunes, Bartolomeu Cabo, Domingos Paulo, Carlos Camongua, Yvette Avognon, Osseni Marcos, Raymond Kintomonho, Onesime Demahou, Gisèle Hounsa, Hugues Chobli, Elie Fassinou, Aurore Zoglobossou, Blaise Tchaou, Charles Tchegnonsi, Fifame Amadji, Francine Bossa, Ernest Ahounou, Djima Alao, Roushdane Odérémi, Afissatou Montairou, Oswald Gbehade, Romaric Tobome, Adam Boukari, Patrick Bakantieba, Arouna Sambo, Fanou Lionelle, Nounagnon Gilbert, Julien Attinon, Roger Klikpezo, Aumar Dadjo, Dénis Fanou, Gilberte Hounkpe, Bachabi Fafana, Néné Nguilu, Bodourin Dossou-Yovo, Chantal Segla, Mohamed Toko, Evelyne Gnele-Dedewanou, Michel Noukounwoui, Ethienne Yado, Timothé Gouroubéra, Valéry Adjignon, Serge Mewanou, Aïcha Tchomgang, Urielle Agossou, Fernand Soton, Charbel Azanlin, Lidwine Zomahoun, Rawéléguinbasba Armel Flavien Kabore, Salam Savadogo, Fatou Fleur Rosine Sanou, Farid Belém, Victoria Hien, Cheik Tidiane Hafid W. Bougouma, Sie Ahmed Ouattara, Mariam Bambara Kabore, Ouedraogo Nazinigouba, Papougnezambo Bonkoungou, Martin Lankoandé, Mireille Traoré, Patrick Sawadogo, Inès Wenmenga, Boureima Kinda, André Simporé, Christian Sapo, Salah Idriss Traore, Haoua Dipama, Lydie WR. Kaboré, Salifou Napon, Télesphore G. Kaboré, Arouna Louré, Pélagie PP. Tondé, Christian Zoundi, Martin Lankoande, Harouna Sanou, Remy Ndikumana, Carlos Nsengiyumva, Gregory Sund, Alliance Niyukuri, Axel Kwizera, Jean-Claude Niyondiko, Adolphe Manzanza Kilembe, Jean Pierre Mwema Ilunga, Nehema Hailemariam Sarah, Gabriel Mubobo Makeya, Idesbald Mwebe Mwepu, Ted Botawaosenge Likongo, Richard Kapela Mvwala, Raphael Nzau Kapend Mubunda, Noellie Kanka Mukuna, Julie Djondo Pembe, Nicolas Lumuanga Ndaye, Eric Bibonge Amisi, Mike Ilunga Madika, Joe Kembo Lungela, Didier Ndonda Mayemba, Philomene Mamba Diyoyo, Alex Mbo Ngalala, Martin Mamba Mukenga, Patricia Tito Kabuni, Dany Bolimo Mpoto, Herve Inesnku Mole, Louise Keby, Oria Andavo Buti, Anselme Phaka, Belinda Mayenge, Jean Jeacques Kabuley Kalongo, Timothe Kemfuni Mawisa, Rodrigue Tondo Ngwizani, Kuyala Leya, Dieudonne Kisile Sanduku, Timothe Nkemfuni Mawisa, Coco Nseke Mfumu, Mbuta Bolenge, Desire Kinzenzengu Kabuce, Patrick Kintieti, Amelia Mbuluku, Vicky Mahuwa, Tharcice Khonde Mabiala, Guilain Ngoy, Patrick Boloko, Nono Mazangama Mvwama, Jose Kengbanda, Pitchou Mushimbonga, Blaise Kuhapala, Nzosani Marcel, Kienze Guylain, Gerard Mboma, Sandra Zalambo Sagboze, Michel Muteya Manika, Jean Pierre Mumbere Kigayi, Roger Mukanire Cishugi, Placide Buhendwa Mugisho, Roger Baguma, Moïse Kongolo, Michel Mandungu Mbayabu, Crispin Mukendi Muamba, Edmond Banema Kapinga, Vasco Ngolela Kapinga, Guylain Tshimanga Nsumpi, Patrick Kanda Odia, Salomon Bingidimi, Gilbert Kpengbemale, Desire Hubert Bofunga Bosonga Imposo, Patricia Matondo, Servet Lelo, Jeremie Kalambayi, Mohamed Abdel-Ghaffar, Abdelrahman Soliman, Mostafa Abdelrahman, Sameh Shehata, Alia Rabee, Mohamed Abou Heba, Mohamed Rabei Abdelfattah, Tamer Ahmed Maher Ghoniem, Sherif M.K. Shehata, Mohamed Lotfy, Ahmed ElHaddad, Bereket Gebremeskel, Girmay Fisseha, Mebrahtu Abay, Degena Bahrey, Assefa Hika, Abdurezak Ali, Kindie Moges, Jemal Ahmed, Desalegn Abdisa, Abebe Megersa, Wendwosen Abayne, Haftom Berhane, Reiye Esayas, Fitsum Kifle, Kokeb Desita, Abebe Addise, Dagim Shimelash, Shitalem Tadesse, Bezaye Zemedkun, Peniel Kenna, Ayenew Yirdie, Abinet Sisay, Tebikew Gashu, Fassil Mihretu, Yesuf Ahmed, Bekele Debebe, Abdureuf Misgea, Amare Agmas, Rahel Assefa, Abdurahman Gelmo, Seifu Alemu, Brook Damtachew, Merid Mersha, Yaekob Chemere, Samuel Fekadu, Sintayehu Regasa, Bonsa Sileshi, Desalegn Wosen, Rebira Adamu, Gersam Mulugeta, Teshome Bacha, Zewude Gudisa, Kebebe Bekele, Alelign Tasew, Habtamu Gezahegn, Daniel Atlaw, Damtew Solomon, Habtemariam Gebresillasie, Girmaye Tesfaye, Negussie Sarbecha, Biniyam Sahiledengle, Kenbon Seyoum, Gemechu Ganfure, Yohannes Tekalegn, Gosa Tesfaye, Temesgen Ayichew, Shibiru Sendaba, Musefa Redwan, Eyasu Muse, Girma Nina, Bizuneh Sime, Addisalem Tadege, Anbesse Jima, Nugusu Ayalew, Dagmawi Workneh, Daniel Teferi, Momodou T. Nyassi, Landing N. Sanyang, Omar Jallow, Abdoulie Keita, Kitabu Jammeh, Charles Roberts, Patrick Idoko, Kebba Marenah, Masirending Njie, Musa Marena, Karamba Suwareh, Simon Boissey, Fatoumatta Jarjusey, Awa Jah, Awa Sanyang, Dado Jabbi, Kajali Camara, Armando Correa, John Jabang, Lamin Jaiteh, Lamin Dampha, Aminata Manneh, Baboucarr Sowe, Abdoulie Bah, Edrisa Jawo, Victoria Okoje, Momodou Baro, Yaya Bah, Mustapha Njie, Sainabou Mbowe, Ebrima Kanteh, Sarjo Ceesay, Alagie Manneh, Evans Atito-Narh, Adwoa Wilson, Romeo Hussey, Emmanuel Okine, Jemima Kwarteng, Ridge Ntiamoah, Samuel Dadzie, Mark Aseti, Naa Sowah, Akosua Appiah, Charles Bankah, Patrick Mburugu, Thomas Chokwe, Patrick Olang, Vernon Gacii, Susane Nabulindo, Antony Gatheru, Timothy Mwiti, Caroline Mwangi, Julius Muriithi, Daniel Ojuka, Omondi Ogutu, Evans Masitara, Mohamed Chaudhry, Reuben Kamundi, Annmarie Kangangi, Thomas Massaquoi, Stephen Takow, Felister Moraa, Aziz Munubi, Moses Kimani, Adili Wobenjo, Linda Nguu, Vincent Omeddo, Rose Malaba, Ambrose Nabwana, Anita Mwancha, Alexandria Mugaa, John Wamwaki, Joyce Chege, Seymour Sinari, Andrew Ndonga, Rose Shitsinzi, Walter Akello, Winfred Kimani, Elisha Kirwa, Seno Saruni, Andrew Wainaina, Ernest Nshom, Aidah Kenseko, Kizito Shisanya, Purity Wanjiru, Julliah Cherotich, Judy Kimutai, Benson Wahome, Grace Wangui, Dennis Wamalwa, Stephen Mwangi, John Chege, Tabitha Wanjiku, Carolyne Njoki, Wachira Waititu, Conrad Ambani, Samuel Murimi, Sharon Waithira, Nilson Mouti, Collins Kibet, John Kibet, Virginia Sokobe, Beatrice Jeymah, Antony Kamadi, Faith Gichuri, Steve Moses, David Wasike, Favours Adeya, Caesar Bitta, Stephen Ogendo, Killian Kariuki, Hdaya BenAbdalla, Taha Suliaman, Fatima Ali Abokhzam, Mohaned Isa, Mohammed Huwaysh, Asma Bourawi, Kais Alzubaidy, Mohammed Albaraesi, Sumayyah Bahroun, Abdulmueti Alhadi, Ahmed Msherghi, Amira Mohamed, Ala Khaled, Nouran Aljadi, Elham Bareig, Khaled Elgazwi, Adel Elgazwi, Ibrahim El-busife, Safa Owhida, Almahdi Eltwati, Samah Elakeili, Taha Abubaker, Fatima Elkhfeefi, Soha Younis Hasan, Amal Alttaira, Imbarkah Elmraied, Rim Wishah, Omar Abugassa, Hazem Ahmed, Amera Ellafi, Shoukrie Shoukrie, Nawal Aldokali, Aws ElGammudi, Akram Alkaseek, Hoda Elhaddad, Ayyah Alqaarh, Ahlam Brish, Malek Abudsnnuga, Salsabil Albuaishi, Mohammed Albashri, Marwa Morgom, Mohammed Alawami, Eman Shawesh, Abdullah Almabrouk, Moaz Alwarfalli, Nagia Abeid, Anis Buzreg, Ans Malek, Ameerah Abayu, Butaina Abdulhafith, Wedad Abouruwes, Marim Albakuri, Sabria Almuammari, Esam Alsaghair, Fatheia Alreshi, Hassan Badi, Rabiee Alfetoey, Naji Zubia, Bushray Almiqlash, Abdulsalam Alshuhoumi, Rayet Al-islam Ben Jouira, Amaal Dier, Essra Gebril, Mohammed Abdelkabir, Sana Moussa, Marwa Alfitori, Mabroukah Azbeda, Hajar Alamin, Ejmeya Barka, Omlsaad Mosbah, Rema Abdasalam, Miftah Hiyoum, Maryam Abd allateef, Ibrahim Altomi, Mahdi Alsakloul, Ekhlas Karami, Munyah Alriqeeq, Mabruka Omar, Ashraf Samer, Aml Aemeesh, Ahmad Bouhuwaish, Ahmed Elusta, Sultan Ahmeed, Wesal AlFighi Hassan, Mouadah Ali Altayr, Mohamed Addalla, Abrar Geddeda, Kheria Khoja, Doaa Alhaj, Muaad Etturki, Ahmed Elhadi, Ibrahim Ellojli, Anshirah Shuwayyah, Ahmed Elfaghih, Malak Alduwayb, Mohamed Aleiyan, Wedad Aboubreeq, Soliman Alkassem, Sami Ashour, Hayat Ben Hasan, Najat Ben Hasan, Ali Yahya, Palesa Chisala, Edward Kommwa, Lusayo Simwinga, Agness Chalira, Precious Kachitsa, Onias Mtalimanja, Drissa Traoré, Moussa Sissoko, Moussa Camara, Adama Koita, Sekou Koumaré, Omar Sacko, Mahamadou Coulibaly, Lamine Soumaré, Soumaïla Keita, Sidiki Keita, Hamadoun Dicko, Boubacar Diallo, Boureima Bengaly, Mohamed Keita, Siaka Diallo, Drissa Ouattara, Nouhoun Ongoiba, Seydina Beye, Honoré Berthe, Mamadou Diakite, Mamadou Sima, Adégné Togo, Bakary Dembele, Djibo Diango, Moussa Samake, Youssouf Traoré, Louis Traoré, Ongoïba Oumar, Sogoba Gaoussou, Issaga Traoré, Sidy Sangaré, Doua Kanté, Lassana Cissé, Thiam Souleymane, Keita Koniba, Sundaresan Maiyalagan, Julien Chong, Adil Mohit, Khushyant Mungar, Shankaran Vinayagam, Kevin Ramlochun, Jamie Sim, Desai Sneha, Vishaal Kissoon, Yan Tseung, Mohamed Aboobakar, Nitish Fokeerah, Ravi Ramsewak, Jayprakash Gopall, Meetheelesh Abeeluck, Varun Seewoo, Divyanand Jankee, Ashveen Puryag, Senthil Beemadoo, Yashraj Deenoo, Abhisek Goureah, Munawwara Makoon, Hemanshu Rambojan, Beeharry Shanjugsingh, Kevin Viraswami, Shehzaad Joomye, Ashwant Bhugwandass, Bibi Deelawar, Vakil Leelodharry, Luckshmanraj Mungur, Sajid Aungraheeta, Sirsingh Bhajoo, Manpreet Rajcoomar, Rishi Seetaram, Subha Gaya, Gini Batra, Yoshvin Sunnassee, Shailendra Petkar, Sbai Hicham, Labib Smail, Ait Laalim Said, Motaai Youssef, Mouhssine Doumiri, Mustapha Alilou, Nora Farnaoui, Mustapha Bensghir, Abdelghafour Elkoundi, Abdelhamid Jaafari, Abderhmann Elwali, Mohammed Meziane, Walid Atmani, Houssam Rebahi, Hajar Chichou, Safae Zarouf, Abderraouf Soummani, Abou Elhassan Taoufik, Meryem Essafti, Aminata Oumou Traoré, Hamzaoui Hamza, Adnane Berdai, El allani Linda, Salhi Oussama, Nelson Mucopo, Machado Banze, Mouzinho Saide, Tomas Sitoi, Artur Machava, Antonio Carlos, Amilton Guidione, Antonio Saide de Carvalho, Natacha Gemo, Samiro Sema Camal, Arsénio Cuna, Ornelos Madeira, Ladino Assuade, Dercio Amde Fernandes, Dulce Alexandre Machavae Fernandes, Mandua Sebastião, Bernard Sikombe, Matti Kandjimi, Ayoub Shekimweri, Diana Shilomboleni, Mbaundju Kandjii, Leonard Kabongo, Cholastic Hangero, Ike Ndjoze, Ruben Nailonga, Immanuel Uukonga, Uutoni Nakanyala, Lavinia Johannes, Adrian Haruzuvi, Chris Terblanche, Natangwe Shimenda, Delwina Katjipu, Hilma Shalimba, Juliah Kaweendwa, Ali Mbuyi, John Oyedele, Mapumba Mulolo, Peter Njuki, Mutombo Ndaie, Akutu Munyika, Hilma Katangolo, David Tjiyokola, Tawanda Mhene, Archbald Masiambiri, Paidamoyo Mandudzo, Sandra Kapepiso, Haziel Mavesere, Cedia Tjihoto, Daylight Manyere, Charlotte Kauraisa, Learnmore Garanowako, Michael Tune, William DeKlerk, Benvenue Ndolo, Maria Angula, Ndapewoshali Hishekwa, Elizabeth Nandjendja, Elsabe Tsauses, Eunice Mouton, Kudzai Katandawa, Sophia Bruwer, Jaydee Van Staden, Beata Siteketa, Beata Kaholongo, Martha Ntinda, Pueya Nashidengo, Johanna Kandjumbwa, Lahia Lipumbu, Moussa Sirfi, Fouma Djibo, Moutari Mahaman, Abdoulaye Mahaman Bachir, Maikassoua Mamane, Adakal Ousseini, Maman Noury Hamissou Souley, Rabo Oumarou, Rekia Idrissa, Moussa Ichaou, Amina Saley, Abdoulay Seyni, Sahabi Amadou, Mahamane Sani Mahamane Laminou, Issoufou Moustapha Camara, Moussa Gagara, Hadjara Rabiou Daddy, Harissou Adamou, Ibrahim Amadou Magagi, Oumarou Habou, Sabo Ramatou, Saidu Kadas, Rabiu Mohammed, Abubakar Ballah, Tella Olalekan, Kefas Bwala, Mohammed Adamu, Adamu Isa, Ademola Adeyeye, Samuel Fayose, Akinola Akinmade, Taiwo Ajayi, Elizabeth Nwasor, Saidu Yakubu, Euphemia Ugwu, George Mukoro, Muhammed Ahmed, Gideon Akafa, Ahmad Lawal, Daniel Nwoye, Michael Odigbo, Zulaihatu Sarkin-Pawa, Tunde Sholadoye, Benjamin Fomete, Hamisu Yakubu, Abdulkadir Kabiru, Samaila Timothy, Ali Yusuf, Tasiu Saadu, Babangida Mohammed, Abdulghaffar Yunus, Ganiyat Olagunju, Muhammad Aminu, Mohammad Idris, Musliu Tolani, Nasiru Dalhat, Samuel Gana, Talent Adike, Lofty-John Anyanwu, Abdurrahman Sheshe, Sani Aji, Mamuda Atiku, Raphael Attah, Abubakar Muhammed, Rasaki Oseni, Halima Salisu-Kabara, Benjamin Nkemjika, Omotayo Salami, Adekunle Akadri, Bukola Olayinka, Clement Onuoha, Umar Usman Jamaare, Auwalu Saminu Jibrin, Sani Giade Abdullahi, Ibrahim Ishaku, Adenike Odewabi, John Bamigboye, Oladapo Kuforiji, Chidiebere Ogo, Stella Ogunmuyiwa, Abdussemee Abdurrazzaaq, Adebayo Tanimola, Michael Adeyanju, Oluwatimilehin Andero, Temitope Ojo, Olusi Adedotun, Gbadamosi Kehinde, Jimoh Buraimoh, Kabiru Muhammad, Sophia Baidoo, Patrick Okoli, Azeez Adigun, Ekene Ezeonye, Kabir Isa, Yetunde Aremu-Kasumu, Kamil Shoretire, Peter Enesi, Amechi Ezike, Olatunde Olawoye, Emmanuel Ugwu, Christopher Ukah, Abolade Olugbenga, Nwachukwu Chidiebere, Nasiru Abdulraman, Adebiyi Olusegun, Alisa Halisa, Semiat Yusuf, Jamila Salisu, Chidiebube Okoro, Abdul Suleiman, Fabian Onowighose, Aliyu Farinyaro, Suleiman Baba, Umar Abdulmajid, Aisha Abdurrahman, Ogochukwu Obi, Olatunde Alabi, William Adeyemi, Jelili Salau, Jones Taiwo, Nnaemeka Nwafulume, Taiye Ibiyeye, Edith Agu, Ayodeji Danboy, James Abdulazeez, Christopher Ekwunife, Chimaobi Nnaji, Chigozirim Onyekpere, Amara Arunsi, Jude Egwim, Obianuju Nwana, Nnabuike Ojiegbe, Charles Mbamba, Paul Ngwu, Frank Imahigbe, Emmanuel Okoroji, Iloh Ikenna, Abdulrahman Mohammed, Adebayo Adeniyi, Toluwalope Ariyo, Olajide Gabriel, Tesleem Orewole, Salawu Idris, Idowu Adebara, Abiodun Okunlola, Akinwale Akinbade, Oluwasesan Afolabi, Adewumi Bakare, Olabisi Adeyemo, Benjamin Ugwu, Samuel Nuhu, Henry Embu, Erdoo Isamade, Chinedu Obikili, Amaka Ocheke, Solomon Peter, Donald Orshio, Peter Onuminya, Jack Okopi, Olufemi Bankole, Bosede Afolabi, Dapo Osinowo, Ayodeji Oluwole, Muyiwa Rotimi, Ibironke Desalu, Rufus Ojewola, Bolaji Mofikoya, Kola Owonikoko, Adeolu Adeoye, Temidayo Bobo, Taiwo Akinloye, David Ama, Ebere Okoronkwo, Muhammad Mahmud, Jamiu Adebiyi, Temitope Babalola, Mansur Muhammad, Afeez Aruna, Maryrose Osazuwa, Ayodeji Yusuf, Isiaka Lawal, Bitrus Fidelis, Rephath Pius, Cyril Jomosu, Adebayo Adedayo, Abubakar Aliyu, Adaora Agholor, Abdullateef Abdulazeez, Chabiya Bala, Eziamaka Eze, Elizabeth Ani, Uchenna Okeke, Dominica Adebayo, Okechukwu Ekwunife, Victor Modekwe, Chuka Ugwunne, Chukwuemeka Okoro, Chisom Uche, Simeon Olateju, Fred Ige-Orhionkpaibima, Adedapo Adetoye, Olurotimi Aaron, Jeremiah Abimbola, Folayemi Faponle, Olumuyiwa Ajayeoba, Olusoji Jagun, Oluwabunmi Fatungase, Adeniyi Akiseku, Chigbundu Nwokoro, Ramotalai Shoyemi, Ibukunolu Ogundele, Nankat Joseph, Salihu Bura, Chukwuka Nwezoku, Manu Bwala, Meshach Philips, Abubakar Usman, Emmanuel Filibus, Zara Umate, Nwabuoke Chukwuka, Ahmed Nuhu, Watakiri Ibrahim, James Nggada, Ali Izge, Musa Ismail, Olayinka Eyelade, Tinuola Adigun, Babatunde Osinaike, Olayinka Ogunbode, Olusola Idowu, Taiwo Lawal, Temidayo Ogundiran, Olayiwola Shittu, Omobolaji Ayandipo, Stephen Edino, Zumnan Songden, Olumide Akitoye, Bissallah Ekele, Godwin Akaba, Terkaa Atim, Akitoye Adeleke, Owoicho Okochi, Sunday Akeju, Ernest Ukpoju, Osayomwanbo Osaheni, Ifunanya Obaseki, Lateef Kehinde, Osawemwenze Monday, Stanley Nte, Adesuwa Agboifo, Omajuwa Dawodu, Precious Orhiere, David Atiti, Queeneth Kalu, Felix Effiom, Israel Kolawole, Olawale Ojo, Afusat Olabinjo, Olufemi Ige, Beatrice Ogunyemi, Olusola Oladosu, Kikelomo Adesina, Sulaiman Agodirin, Asimiyu Shittu, Audu Idrisa, Sadiq Adamu, Nuhu Ali, Olayinka Adewunmi, Stephen Nwankwor, Akinwumi Olakanmi, Oluseye Ajayi, Ayotolu Ajayi, Victor Ogunmola, Oluwafunke Olakanmi, Adam Kuranga, Enoch Uche, Chukwuemeka Osuagwu, Chukwudi Ilo, Mesi Matthew, Uko Uko, Ngozi Mba, Olubusola Alagbe-Briggs, Amabra Dodiyi-Manuel, Bisola Onajin-Obembe, Bright Obasuyi, Richard Echem, Ihuoma Mike-Elechi, Job Otokwala, Mark Edubio, Catherine Eyo, Isaac Udo, Aliyu Abdulrahman, A.A. Abdullahi, Ibrahim Galadima Bello, Usman Adinoyin Mohammed, Abidemi Oyaromade, Mohammed Bello, Usman Muhammad, Emeri Mbah, Hyacinth Okereke, Almustapha Aminu, Anthony Ahmadu, Abu Rogers, Peter Samai, Sao Amara, Margaret Yankuba, Mary Josayah, Jayah Swarray Jnr, Alusine Dawo, Peter George, Mustapha Kabba, Mohamed Bah, Charles Mondeh, Ibrahim Kapuwa, Mohamed Sheku, Philip Mattia, Brima Sesay, Jones O.A. Omoshoro-Jones, Motselisi Mbeki, Estie Cloete, Philip Anderson, Busi Mrara, Annemarie Steyn, Tsakani Mhlari, Nic Proctor, Caroline Robertson, Gillian Lamacroft, Usha Singh, Sebenzile Sikhakhane, Kelly Gate, Shepherd Nzenza, John Tshimbalanga Kasonga, Sibongile Ndebele, Patrick Lufuta Kande, Jody Davids, Tino-vito Orlandi, Marischka de Jong, Hugo Stark, Francois Roodt, Jonathan Hall, Ian Nortje, Akanimo Akpakan, Vishendran Govindasamy, Ronisha Sathiram, Mohammad Kathrada, Zane Farina, Lucio Frittella, Charles Kohler, Sibuyiselwe Lubelwana, Sarwat Ikram-Hameed, Adriaan Smit, Muneerah Cassiem, Yvonne Freeman, Saaliha Goga, Larissa Cronje, Constantin Buzdugan, Subash Chirkut, Priyadeshni Singh, Sandhya Jithoo, Vivesh Rughubar, John Arnold, Rishan Bipath, Suman Mewa Kinoo, Ncumisa Khanyisa Msolo, Fleur Ackermans-Deijnen, Tshegofatso Mmasello Emma Boka, Martyn Biccard Greenwood, Shakthi Anand Jayrajh, Devarani Naidoo, Syndrini Reddy, Devandiran Harriraman Rungan, Kylene Subrayen, John Roos, Nina Tredoux, Pascal Plumacher, Anthony Reed, Harald Steinhaus, Mariesa Nock, Paul Ryan Herselman, Gareth Davies, Talitha Harvey, Franklin Muller, Willem Naude, Tania Pretorius, Johan Jochemus Swart, Merryn Walls, Prashant Gokal, Nicolette Rorke, Farzaana Dhoodhat, Precious Dzanibe, Mohammed Yusuf Hussain, Ashmita Junpath, Ameela Maharaj, Hylda Makanisi, Khalid Moosa, Ting Ting Wong, Sean Mould, Trisha Ramsamy, Roel Matos-Puig, Hayley Morgan, Nadeem Nabeebuccas, Ria Devi Naidoo, Viantha Pather, Vasheel Vasheel Bahadur, Renilda Pillay, Zahnne Fullerton, Nicole Bell, Bongisa Grey, Vincent Lorenzo Visentin, Hendrik Adriaan Van Zyl, Terri Anne Killingbeck, Emile Maneveldt, Gerhard Thiart, Magdelena May Venter, Oostewalt Swart, Mariette Grobelaar, Carel Cairns, David Bishop, Christien Steenkamp, Thandekile Khumalo, Noel Naidoo, Ross Murray, Martin Kopieniak, Melusi Sishange, Mxolisi Brian Ndimande, Megan Jaworska, Sarwat Ikram, Bence Rainier, Renier J. Liebenberg, Helena D. Zwiegers, Philip M. Nortje, Kamal Bhagwan, Margot Flint, Robert Dyer, Simone Adams, Yoshua Bwambale, Danny Ngomo, Patrice Kanku, Nivashen Pillay, Alexa de Castro, Atisha Maharaj, Janine Carim, Jenna Leigh Taylor, Karl M. Köhne, Leanne W. Drummond, Leanne Temlett, Lieze Geldenhuys, Yvonne Seilbea, Kathryn Naidoo, Nicola A. Kalafatis, Stefné Verwey, Thulile Biyase, Theroshnie Kisten, Belinda S. Kusel, Timothy Craig Hardcastle, Richard Magagula, Christian Kampik, Kuzolunga Xulu, Sivuyisiwe Solala, Mia Sayed, Basil Enicker, Anil Madaree, Innocent Mukama, Gladmore Madombwe, Nonhlanhla Zulu, Nompumelelo Gasa, Nokuzula Kanjana, Sebenzile Buthelezi, Thembelihle Buthelezi, Andries Brink, Francois Potgieter, Busisiwe Mrara, Zaynab Alexander, Charles Choto, Paula Ima, Zintle Gxagxisa, Baphethuxolo Ningiza, Gillian Lamacraft, Jerome Mogorosi, Nadia du Plessis, Leonie de Man, Suné Thompson, Gerrit van Heerden, Edwin W. Turton, Pieter M. van der Linde, Josephine K. 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Saffy, Ene-Mari Roscher, Kristel Fortune, George Barnard, Tiisetso Makhasane, Evan Bowen, Akangcha Pal, Rachel Moore, Maria Fourtounas, Mary Augusta Adam, Renessa Arumugan, Gabriella Hyman, Jaclyn Jonosky, Maninginingi Makondo, Heveshan Moodley, Phillip Munda, Mzwandile Nyalungu, Victor Olusola, Sohan Zane Pinto, Tristan Pillay, Lucinda Singh, Paul Mwindekuma Wondoh, John Devar, Boitumelo Baloyi-Mnisi, Zach Koto, Matlou Ernest Mabitsela, Sibongile Ruth Ndlovu, Branny Mthelebofu, Colin Beck, Matthew Dold, Alice Fan, Shannon MacQueen, Thembani Matabata, Catherine Mpehle, Charné Kulenkampf, Tsakani McCreath Mhlari, Simangele Cecilia Nyoka-Mokgalong, Felix Thumba Masinge, Randhir Ramnath Gunpath, Maropeng Petrus Pat Mothwa, Jo-Anne Asenath Mothwa, Danai Mhlanga, Jamie-Lyn Colly, Aunel Mallier Peter, Khalid Ben Hameda, Pulane Mokae, Stella Josephine Moumakoe, Kelechi Ekeh, Nezingu Lengo, Marnus Booyens, Inge Louise Seale, Pieter Daniel Theron, Nicolaas Abraham Schuman, Amber Carlyn Sonn, Jacobus Lukas Stander, Nadia Cloete, Marius Cloete, Catherine Ann Makepeace, Ronel van der Westhuizen, Leanne Robyn Messiahs, Amy Ruth Visagie, Fatima Vawda, Frans Christiaan Voster, Deepika Dhilraj, Oliver Smith, Stefan Bolon, Daniel Montwedi, Motsilisi Mbeki, Jayde Wyngaard, Mthunzi Ngcelwane, Thomas Kleyenstuber, Phyllis Phukubye, Liesel Schärf, Grace Laker, Elizabeth Semenya, Reinhard Dembskey, Thomas Tarlton, Tapiwa Jiri, Ngoie Hubert Mushid, Nhlanhla Samuel Ngwenya, Hazel Morongoa Mogodi, Carmen Sinevici, Anthony Osarogie Usenbo, Naledi Fodo, Anesu Chimini, Ntetelelo Sikobi, Sinovuyo Nokwange, Mluleki Noqhamza, Qumba Thembisa, Kajake Anantha Padmanabha Bhat, Rabin Mathew, Katrin Middleton, Abdus-sami Adewunmi, Craig Dickson, Humairah Bulbulia, Bianka Bester, Michelle de Klerk, Christia Benade, Francois Viljoen, Monique Fischer, Khalid Alfaki, Abdalmalik Awad, Abdelsalam Algray, Mohammed Elsiddig, Suha Mohamed, Salih Mahmoud, Muhammed Osman, Asia Elgailany, Mazin Suliman, Hanaa Mohammed, Lina Aljeally, Mohammed Dirar, Mohammed Osman, Mazin Mohamed, Mohamed Elhasan, Abrar Widatalla, Abubakr Abubakr, Eman Mohamed, Alshareef Nour, Ntonto Doris Gama, Dolorosa Khetsiwe Shabangu, Cynthia Iradikunda, Samuel Mkoko, Paul Kisanga, Emmanuel Lema, Benson Lyimo, Mohamed Binde, Alphonce Chandika, Salim Salim, Sylvia Jumbe, Abel Makubi, Vihar Kotecha, Felician Kachinde, Museleta Nyakiroto, Emmanuel Jitambi, Venant Geofrey, Johaphes Josiah, Phinius Makubi, Frank Manumbu, Suzan Mlingwa, Ernest Ibenzi, Peter Mbelle, Kato Peleus, Enid Chiwanga, Nillah Richard, Shoo Leonard, Paulo Sanka, Subira Mushi, Bashir Nyangasa, Mohamed Janabi, Naizihijwa Majani, Pedro Palangyo, Evarist Nyawawa, William Ramadhan, Faraj Lydenge, Gileard Gabriel Masenga, Sakina Rashid, Mubashir Jusabani, Ansbert Ndebea, Jenitha Cheru, Margaret Henjewele, Greyson Kilimanjaro, Sarah Sikimata, Deocles Donatus, Hazina Maduhu, Tumaini Mariro, Given Massasi, Moshi Moshi Shabani, Braison Cholela, Marco Mgeleka, Yohatinus Mbilinyi, Faraja Chiwanga, Bilton Exavery, Caspar Haule, Samson Ndile, Sirili Harya, Julieth Magandi, Deogratius Manyama, Redempta Matindi, Adam Moshi, Daudi Kitwana, Merida Makia, Philip Muhochi, Miriam Herman, Clauda Miombo, Furaha Kahindo, Langtone Kishebuka, Elijah Ussiri, Gloria Kinasa, Patrick Adel, Eric Malaba, Vensesla Sakwari, Sadot Lugereka, Mohamed Mungia, George Mocha, Herman Wella, Cecilia Protas, Patrick Karua, Ahmada Kashagama, Faraja Mwasambugu, Suzana Kajeri, Jacquiline Mchilla, Elibariki Lucumay, Robert Maise, Amon Marti, Beatrice Mahundi, Frederika Jager, Charles Majani, Ludovick Rukeha, Tareeq Mohamed, Nabila Fuad, Winifrida Halinga, Elias Chrisant, Gilbert Msoma, Titus Kihwili, Gadiel Temu, Naima Yusuf, Rashid Saleh, Rashid Inoja, Eva Shang'a, Stella Ibrahim, Hussein Msuma, Edwin Edward, Paul Kilamile, Stephen Mwakyolile, Talkana Adja, Edem Gueouguede, Hafoudhoi Oussene Seddoh, Saliou Adam, Pilakimwe Egbohou, Mawunyo Ahomagnon, Olivier Kadjossou, Abdul-Bassiti Boukari, Mary T. Nabukenya, Ruth Muhindo, Peter Waswa, Peter Kaahwa Agaba, Daphne Kabatoro, Joseph Kayongo, Margaret Naggujja, Nabasiige Rehema, Phiona Nansubuga, Daniel Kavuma, Aggrey Lubikire, Hope Bisilikirwa, Godfrey Ssebaggala, Emmanuel Muwema, Humble Joan Agaba, John Kiconco, Nicholas Wataaka, Bonet Chan, Mary Juliet Nampawu, Fred Bulamba, Emmanuel Bua, Christine Mugala, Caroline Nyakato, John Paul Ochieng, Linda Kyomuhendo Jovia, George Kateregga, Rachel Alum, Lazia Najjuma, Gorret Nampiina, Andrew Kintu, Joshua Sempiira, Luzige Simon, Peter Kayima, Jacob Eyul, Erick Odwar, Rita Nkwine, Christine Namata, Elizabeth Nabakka, Denis Kakaire, Velda Mushangwe-Mtisi, Erisha Munhamo, Celestino Dhege, Juliet Hungwa, Hemish Jasi, Crispin Ntoto, Derek Matsika, Brightson Mutseyekwa, Joseph Zimbovoora, Beaulah Gudyanga, Dennis Mazingi, Chenesa Mbanje, Busisiwe Mlambo, Michael Chiwanga, Harunavamwe N. Chifamba, Sarudzai Zhou, Esta Hove, Shamiso Dende, Beauty Manjengwa, Penias Kapisa, null Mashava, Caritas Chiura, Locadia Katsukunya, Godfrey Muguti, Doreen Mashava, Elton Ndhlovu, Zanele Mangwangwa, and Nombulelo Dube

Subjects
medicine.medical_specialty, Interprofessional Relations, media_common.quotation_subject, Psychological intervention, Fidelity, Postoperative Complications, Surveys and Questionnaires, Intervention (counseling), Humans, Medicine, Postoperative Period, Cooperative Behavior, Nursing management, media_common, Response rate (survey), business.industry, Standard of Care, Odds ratio, Hospitals, Confidence interval, Clinical trial, Anesthesiology and Pain Medicine, Population Surveillance, Africa, Physical therapy, business
Abstract

Background The African Surgical OutcomeS-2 (ASOS-2) trial tested an enhanced postoperative surveillance intervention to reduce postoperative mortality in Africa. We undertook a concurrent evaluation to understand the process of intervention delivery. Methods Mixed-methods process evaluation, including field notes, interviews, and post-trial questionnaire responses. Qualitative analysis used the framework method with subsequent creation of comparative case studies, grouping hospitals by intervention fidelity. A post-trial questionnaire was developed using initial qualitative analyses. Categorical variables were summarised as count (%) and continuous variables as median (inter-quartile range [IQR]). Odds ratios (OR) were used to rank influences by impact on fidelity. Results The dataset included eight in-depth case studies, and 96 questionnaire responses (response rate 67%) plus intervention fidelity data for each trial site. Overall, 57% (n=55/96) of hospitals achieved intervention delivery using an inclusive definition of fidelity. Delivery of the ASOS-2 interventions and data collection presented a significant burden to the investigators, outstripping limited resources. The influences most associated with fidelity were: surgical staff enthusiasm for the trial (OR=3.0; 95% confidence interval [CI], 1.3–7.0); nursing management support of the trial (OR=2.6; 95% CI, 1.1–6.5); performance of a dummy run (OR=2.6; 95% CI, 1.1–6.1); nursing colleagues seeing the value of the intervention(s) (OR=2.1; 95% CI, 0.9–5.7); and site investigators' belief in the effectiveness of the intervention (OR=3.2; 95% CI, 1.2–9.4). Conclusions ASOS-2 has proved that coordinated interventional research across Africa is possible, but delivering the ASOS-2 interventions was a major challenge for many investigators. Future improvement science efforts must include better planning for intervention delivery, additional support to investigators, and promotion of strong inter-professional teamwork. Clinical trial registration ClinicalTrials gov NCT03853824.

Published
2021
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6. Enhanced postoperative surveillance versus standard of care to reduce mortality among adult surgical patients in Africa (ASOS-2): a cluster-randomised controlled trial

Author

Bruce M Biccard, Leon du Toit, Maia Lesosky, Tim Stephens, Landon Myer, Agya BA Prempeh, Nicola Vickery, Hyla-Louise Kluyts, Alexandra Torborg, Akinyinka Omigbodun, Adesoji Ademuyiwa, Muhammed Elhadi, Mohamed Elfagieh, Bernard Mbwele, Mpoki Ulisubisya, Lazaro Mboma, Daniel Z Ashebir, Mahlet Tesfaye Bahta, Mohammed Hassen, Mikiyas Teferi, Yakob Seman, Eugene Zoumenou, Adam Hewitt-Smith, Janat Tumukunde, Dolly Munlemvo, Atilio Morais, Apollo Basenero, Pisirai Ndarukwa, Nazinigouba Ouerdraogo, Maman Sani Chaibou, Mohyeddine Zarouf, Ahmed Rhassane El Adib, Veekash Gobin, Zimogo Sanogo, Youssouf Coulibaly, Zipporah Ngumi, Tarig Fadalla, Cynthia Iradukunda, Vénérand Barendegere, Isaac O Smalle, Mustapha Bittaye, Ahmadou Lamin Samateh, Mahmoud Elfiky, Maher Fawzy, Wakisa Mulwafu, Vanessa Msosa, Lygia Lopes, Akwasi Antwi-Kusi, Hamza D Sama, Patrice Forget, Dawid van Straaten, Rupert M Pearse, Marichen Puchert, Lucy Rolt, Kris Schwebler, Freddy Kabambi, Tebogo Mabotja, Leandys Cobas, Albino Freitas, Maria Antunes, Bartolomeu Cabo, Domingos Paulo, Carlos Camongua, Yvette Avognon, Osseni Marcos, Raymond Kintomonho, Onesime Demahou, Gisèle Hounsa, Hugues Chobli, Elie Fassinou, Aurore Zoglobossou, Blaise Tchaou, Charles Tchegnonsi, Fifame Amadji, Francine Bossa, Ernest Ahounou, Djima Alao, Roushdane Odérémi, Afissatou Montairou, Oswald Gbehade, Romaric Tobome, Adam Boukari, Patrick Bakantieba, Arouna Sambo, Fanou Lionelle, Nounagnon Gilbert, Julien Attinon, Roger Klikpezo, Aumar Dadjo, Dénis Fanou, Gilberte Hounkpe, Bachabi Fafana, Néné Nguilu, Bodourin Dossou-Yovo, Chantal Segla, Mohamed Toko, Evelyne Gnele-Dedewanou, Michel Noukounwoui, Ethienne Yado, Timothé Gouroubéra, Valéry Adjignon, Serge Mewanou, Aïcha Tchomgang, Urielle Agossou, Fernand Soton, Charbel Azanlin, Lidwine Zomahoun, Rawéléguinbasba Armel Flavien Kabore, Salam Savadogo, Fatou Fleur Rosine Sanou, Farid Belém, Victoria Hien, Cheik Tidiane Hafid W Bougouma, Sie Ahmed Ouattara, Mariam Bambara Kabore, Ouedraogo Nazinigouba, Papougnezambo Bonkoungou, Martin Lankoandé, Mireille Traoré, Patrick Sawadogo, Inès Wenmenga, Boureima Kinda, André Simporé, Christian Sapo, Salah Idriss Traore, Haoua Dipama, Lydie WR Kaboré, Salifou Napon, Télesphore G Kaboré, Arouna Louré, Pélagie PP Tondé, Christian Zoundi, Harouna Sanou, Remy Ndikumana, Carlos Nsengiyumva, Gregory Sund, Alliance Niyukuri, Axel Kwizera, Jean-Claude Niyondiko, Adolphe Manzanza Kilembe, Jean Pierre Mwema Ilunga, Nehema Hailemariam Sarah, Gabriel Mubobo Makeya, Idesbald Mwebe Mwepu, Ted Botawaosenge Likongo, Richard Kapela Mvwala, Raphael Nzau Kapend Mubunda, Noellie Kanka Mukuna, Julie Djondo Pembe, Nicolas Lumuanga Ndaye, Eric Bibonge Amisi, Mike Ilunga Madika, Joe Kembo Lungela, Didier Ndonda Mayemba, Philomene Mamba Diyoyo, Alex Mbo Ngalala, Martin Mamba Mukenga, Patricia Tito Kabuni, Dany Bolimo Mpoto, Herve Inesnku Mole, Louise Keby, Oria Andavo Buti, Anselme Phaka, Belinda Mayenge, Jean Jeacques Kabuley Kalongo, Timothe Kemfuni Mawisa, Rodrigue Tondo Ngwizani, Kuyala Leya, Dieudonne Kisile Sanduku, Timothe Nkemfuni Mawisa, Coco Nseke Mfumu, Mbuta Bolenge, Desire Kinzenzengu Kabuce, Patrick Kintieti, Amelia Mbuluku, Vicky Mahuwa, Tharcice Khonde Mabiala, Guilain Ngoy, Patrick Boloko, Nono Mazangama Mvwama, Jose Kengbanda, Pitchou Mushimbonga, Blaise Kuhapala, Nzosani Marcel, Kienze Guylain, Gerard Mboma, Sandra Zalambo Sagboze, Michel Muteya Manika, Jean Pierre Mumbere Kigayi, Roger Mukanire Cishugi, Placide Buhendwa Mugisho, Roger Baguma, Moïse Kongolo, Michel Mandungu Mbayabu, Crispin Mukendi Muamba, Edmond Banema Kapinga, Vasco Ngolela Kapinga, Guylain Tshimanga Nsumpi, Patrick Kanda Odia, Salomon Bingidimi, Gilbert Kpengbemale, Desire Hubert Bofunga Bosonga Imposo, Patricia Matondo, Servet Lelo, Jeremie Kalambayi, Mohamed Abdel-Ghaffar, Abdelrahman Soliman, Mostafa Abdelrahman, Sameh Shehata, Alia Rabee, Mohamed Abou Heba, Mohamed Rabei Abdelfattah, Tamer Ahmed Maher Ghoniem, Sherif M.K. Shehata, Mohamed Lotfy, Ahmed ElHaddad, Bereket Gebremeskel, Girmay Fisseha, Mebrahtu Abay, Degena Bahrey, Assefa Hika, Abdurezak Ali, Kindie Moges, Jemal Ahmed, Desalegn Abdisa, Abebe Megersa, Wendwosen Abayne, Haftom Berhane, Reiye Esayas, Fitsum Kifle, Kokeb Desita, Abebe Addise, Dagim Shimelash, Shitalem Tadesse, Bezaye Zemedkun, Peniel Kenna, Ayenew Yirdie, Abinet Sisay, Tebikew Gashu, Fassil Mihretu, Yesuf Ahmed, Bekele Debebe, Abdureuf Misgea, Amare Agmas, Rahel Assefa, Abdurahman Gelmo, Seifu Alemu, Brook Damtachew, Merid Mersha, Yaekob Chemere, Samuel Fekadu, Sintayehu Regasa, Bonsa Sileshi, Desalegn Wosen, Rebira Adamu, Gersam Mulugeta, Teshome Bacha, Zewude Gudisa, Kebebe Bekele, Alelign Tasew, Habtamu Gezahegn, Daniel Atlaw, Damtew Solomon, Habtemariam Gebresillasie, Girmaye Tesfaye, Negussie Sarbecha, Biniyam Sahiledengle, Kenbon Seyoum, Gemechu Ganfure, Yohannes Tekalegn, Gosa Tesfaye, Temesgen Ayichew, Shibiru Sendaba, Musefa Redwan, Eyasu Muse, Girma Nina, Bizuneh Sime, 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Ekhlas Karami, Munyah Alriqeeq, Mabruka Omar, Ashraf Samer, Aml Aemeesh, Ahmad Bouhuwaish, Ahmed Elusta, Sultan Ahmeed, Wesal AlFighi Hassan, Mouadah Ali Altayr, Mohamed Addalla, Abrar Geddeda, Kheria Khoja, Doaa Alhaj, Muaad Etturki, Ahmed Elhadi, Ibrahim Ellojli, Anshirah Shuwayyah, Ahmed Elfaghih, Malak Alduwayb, Mohamed Aleiyan, Wedad Aboubreeq, Soliman Alkassem, Sami Ashour, Hayat Ben Hasan, Najat Ben Hasan, Ali Yahya, Palesa Chisala, Edward Kommwa, Lusayo Simwinga, Agness Chalira, Precious Kachitsa, Onias Mtalimanja, Drissa Traoré, Moussa Sissoko, Moussa Camara, Adama Koita, Sekou Koumaré, Omar Sacko, Mahamadou Coulibaly, Lamine Soumaré, Soumaïla Keita, Sidiki Keita, Hamadoun Dicko, Boubacar Diallo, Boureima Bengaly, Mohamed Keita, Siaka Diallo, Drissa Ouattara, Nouhoun Ongoiba, Seydina Beye, Honoré Berthe, Mamadou Diakite, Mamadou Sima, Adégné Togo, Bakary Dembele, Djibo Diango, Moussa Samake, Youssouf Traoré, Louis Traoré, Ongoïba Oumar, Sogoba Gaoussou, Issaga Traoré, Sidy Sangaré, Doua Kanté, Lassana Cissé, Thiam Souleymane, Keita Koniba, Sundaresan Maiyalagan, Julien Chong, Adil Mohit, Khushyant Mungar, Shankaran Vinayagam, Kevin Ramlochun, Jamie Sim, Desai Sneha, Vishaal Kissoon, Yan Tseung, Mohamed Aboobakar, Nitish Fokeerah, Ravi Ramsewak, Jayprakash Gopall, Meetheelesh Abeeluck, Varun Seewoo, Divyanand Jankee, Ashveen Puryag, Senthil Beemadoo, Yashraj Deenoo, Abhisek Goureah, Munawwara Makoon, Hemanshu Rambojan, Beeharry Shanjugsingh, Kevin Viraswami, Shehzaad Joomye, Ashwant Bhugwandass, Bibi Deelawar, Vakil Leelodharry, Luckshmanraj Mungur, Sajid Aungraheeta, Sirsingh Bhajoo, Manpreet Rajcoomar, Rishi Seetaram, Subha Gaya, Gini Batra, Yoshvin Sunnassee, Shailendra Petkar, Sbai Hicham, Labib Smail, Ait Laalim Said, Motaai Youssef, Mouhssine Doumiri, Mustapha Alilou, Nora Farnaoui, Mustapha Bensghir, Abdelghafour Elkoundi, Abdelhamid Jaafari, Abderhmann Elwali, Mohammed Meziane, Walid Atmani, Houssam Rebahi, Hajar Chichou, Safae Zarouf, Abderraouf Soummani, Abou Elhassan Taoufik, Meryem Essafti, Aminata Oumou Traoré, Hamzaoui Hamza, Adnane Berdai, El allani Linda, Salhi Oussama, Nelson Mucopo, Machado Banze, Mouzinho Saide, Tomas Sitoi, Artur Machava, Antonio Carlos, Amilton Guidione, Antonio Saide de Carvalho, Natacha Gemo, Samiro Sema Camal, Arsénio Cuna, Ornelos Madeira, Ladino Assuade, Dercio Amde Fernandes, Dulce Alexandre Machavae Fernandes, Mandua Sebastião, Bernard Sikombe, Matti Kandjimi, Ayoub Shekimweri, Diana Shilomboleni, Mbaundju Kandjii, Leonard Kabongo, Cholastic Hangero, Ike Ndjoze, Ruben Nailonga, Immanuel Uukonga, Uutoni Nakanyala, Lavinia Johannes, Adrian Haruzuvi, Chris Terblanche, Natangwe Shimenda, Delwina Katjipu, Hilma Shalimba, Juliah Kaweendwa, Ali Mbuyi, John Oyedele, Mapumba Mulolo, Peter Njuki, Mutombo Ndaie, Akutu Munyika, Hilma Katangolo, David Tjiyokola, Tawanda Mhene, Archbald Masiambiri, Paidamoyo Mandudzo, Sandra Kapepiso, Haziel Mavesere, Cedia Tjihoto, Daylight Manyere, Charlotte Kauraisa, Learnmore Garanowako, Michael Tune, William DeKlerk, Benvenue Ndolo, Maria Angula, Ndapewoshali Hishekwa, Elizabeth Nandjendja, Elsabe Tsauses, Eunice Mouton, Kudzai Katandawa, Sophia Bruwer, Jaydee Van Staden, Beata Siteketa, Beata Kaholongo, Martha Ntinda, Pueya Nashidengo, Johanna Kandjumbwa, Lahia Lipumbu, Moussa Sirfi, Fouma Djibo, Moutari Mahaman, Abdoulaye Mahaman Bachir, Maikassoua Mamane, Adakal Ousseini, Maman Noury Hamissou Souley, Rabo Oumarou, Rekia Idrissa, Moussa Ichaou, Amina Saley, Abdoulay Seyni, Sahabi Amadou, Mahamane Sani Mahamane Laminou, Issoufou Moustapha Camara, Moussa Gagara, Hadjara Rabiou Daddy, Harissou Adamou, Ibrahim Amadou Magagi, Oumarou Habou, Sabo Ramatou, Saidu Kadas, Rabiu Mohammed, Abubakar Ballah, Tella Olalekan, Kefas Bwala, Mohammed Adamu, Adamu Isa, Ademola Adeyeye, Samuel Fayose, Akinola Akinmade, Taiwo Ajayi, Elizabeth Nwasor, Saidu Yakubu, Euphemia Ugwu, George Mukoro, Muhammed Ahmed, Gideon Akafa, Ahmad Lawal, Daniel Nwoye, Michael Odigbo, Zulaihatu Sarkin-Pawa, Tunde Sholadoye, Benjamin Fomete, Hamisu Yakubu, Abdulkadir Kabiru, Samaila Timothy, Ali Yusuf, Tasiu Saadu, Babangida Mohammed, Abdulghaffar Yunus, Ganiyat Olagunju, Muhammad Aminu, Mohammad Idris, Musliu Tolani, Nasiru Dalhat, Samuel Gana, Talent Adike, Lofty-John Anyanwu, Abdurrahman Sheshe, Sani Aji, Mamuda Atiku, Raphael Attah, Abubakar Muhammed, Rasaki Oseni, Halima Salisu-Kabara, Benjamin Nkemjika, Omotayo Salami, Adekunle Akadri, Bukola Olayinka, Clement Onuoha, Umar Usman Jamaare, Auwalu Saminu Jibrin, Sani Giade Abdullahi, Ibrahim Ishaku, Adenike Odewabi, John Bamigboye, Oladapo Kuforiji, Chidiebere Ogo, Stella Ogunmuyiwa, Abdussemee Abdurrazzaaq, Adebayo Tanimola, Michael Adeyanju, Oluwatimilehin Andero, Temitope Ojo, Olusi Adedotun, Gbadamosi Kehinde, Jimoh Buraimoh, Kabiru Muhammad, Sophia Baidoo, Patrick Okoli, Azeez Adigun, Ekene Ezeonye, Kabir Isa, Yetunde Aremu-Kasumu, Kamil Shoretire, Peter Enesi, Amechi Ezike, Olatunde Olawoye, Emmanuel Ugwu, Christopher Ukah, Abolade Olugbenga, Nwachukwu Chidiebere, Nasiru Abdulraman, Adebiyi Olusegun, Alisa Halisa, Semiat Yusuf, Jamila Salisu, Chidiebube Okoro, Abdul Suleiman, Fabian Onowighose, Aliyu Farinyaro, Suleiman Baba, Umar Abdulmajid, Aisha Abdurrahman, Ogochukwu Obi, Olatunde Alabi, William Adeyemi, Jelili Salau, Jones Taiwo, Nnaemeka Nwafulume, Taiye Ibiyeye, Edith Agu, Ayodeji Danboy, James Abdulazeez, Christopher Ekwunife, Chimaobi Nnaji, Chigozirim Onyekpere, Amara Arunsi, Jude Egwim, Obianuju Nwana, Nnabuike Ojiegbe, Charles Mbamba, Paul Ngwu, Frank Imahigbe, Emmanuel Okoroji, Iloh Ikenna, Abdulrahman Mohammed, Adebayo Adeniyi, Toluwalope Ariyo, Olajide Gabriel, Tesleem Orewole, Salawu Idris, Idowu Adebara, Abiodun Okunlola, Akinwale Akinbade, Oluwasesan Afolabi, Adewumi Bakare, Olabisi Adeyemo, Benjamin Ugwu, Samuel Nuhu, Henry Embu, Erdoo Isamade, Chinedu Obikili, Amaka Ocheke, Solomon Peter, Donald Orshio, Peter Onuminya, Jack Okopi, Olufemi Bankole, Bosede Afolabi, Dapo Osinowo, Ayodeji Oluwole, Muyiwa Rotimi, Ibironke Desalu, Rufus Ojewola, Bolaji Mofikoya, Kola Owonikoko, Adeolu Adeoye, Temidayo Bobo, Taiwo Akinloye, David Ama, Ebere Okoronkwo, Muhammad Mahmud, Jamiu Adebiyi, Temitope Babalola, Mansur Muhammad, Afeez Aruna, Maryrose Osazuwa, Ayodeji Yusuf, Isiaka Lawal, Bitrus Fidelis, Rephath Pius, Cyril Jomosu, Adebayo Adedayo, Abubakar Aliyu, Adaora Agholor, Abdullateef Abdulazeez, Chabiya Bala, Eziamaka Eze, Elizabeth Ani, Uchenna Okeke, Dominica Adebayo, Okechukwu Ekwunife, Victor Modekwe, Chuka Ugwunne, Chukwuemeka Okoro, Chisom Uche, Simeon Olateju, Fred Ige-Orhionkpaibima, Adedapo Adetoye, Olurotimi Aaron, Jeremiah Abimbola, Folayemi Faponle, Olumuyiwa Ajayeoba, Olusoji Jagun, Oluwabunmi Fatungase, Adeniyi Akiseku, Chigbundu Nwokoro, Ramotalai Shoyemi, Ibukunolu Ogundele, Nankat Joseph, Salihu Bura, Chukwuka Nwezoku, Manu Bwala, Meshach Philips, Abubakar Usman, Emmanuel Filibus, Zara Umate, Nwabuoke Chukwuka, Ahmed Nuhu, Watakiri Ibrahim, James Nggada, Ali Izge, Musa Ismail, Olayinka Eyelade, Tinuola Adigun, Babatunde Osinaike, Olayinka Ogunbode, Olusola Idowu, Taiwo Lawal, Temidayo Ogundiran, Olayiwola Shittu, Omobolaji Ayandipo, Stephen Edino, Zumnan Songden, Olumide Akitoye, Bissallah Ekele, Godwin Akaba, Terkaa Atim, Akitoye Adeleke, Owoicho Okochi, Sunday Akeju, Ernest Ukpoju, Osayomwanbo Osaheni, Ifunanya Obaseki, Lateef Kehinde, Osawemwenze Monday, Stanley Nte, Adesuwa Agboifo, Omajuwa Dawodu, Precious Orhiere, David Atiti, Queeneth Kalu, Felix Effiom, Israel Kolawole, Olawale Ojo, Afusat Olabinjo, Olufemi Ige, Beatrice Ogunyemi, Olusola Oladosu, Kikelomo Adesina, Sulaiman Agodirin, Asimiyu Shittu, Audu Idrisa, Sadiq Adamu, Nuhu Ali, Olayinka Adewunmi, Stephen Nwankwor, Akinwumi Olakanmi, Oluseye Ajayi, Ayotolu Ajayi, Victor Ogunmola, Oluwafunke Olakanmi, Adam Kuranga, Enoch Uche, Chukwuemeka Osuagwu, Chukwudi Ilo, Mesi Matthew, Uko Uko, Ngozi Mba, Olubusola Alagbe-Briggs, Amabra Dodiyi-Manuel, Bisola Onajin-Obembe, Bright Obasuyi, Richard Echem, Ihuoma Mike-Elechi, Job Otokwala, Mark Edubio, Catherine Eyo, Isaac Udo, Aliyu Abdulrahman, A.A. Abdullahi, Ibrahim Galadima Bello, Usman Adinoyin Mohammed, Abidemi Oyaromade, Mohammed Bello, Usman Muhammad, Emeri Mbah, Hyacinth Okereke, Almustapha Aminu, Anthony Ahmadu, Abu Rogers, Peter Samai, Sao Amara, Margaret Yankuba, Mary Josayah, Jayah Swarray Jnr, Alusine Dawo, Peter George, Mustapha Kabba, Mohamed Bah, Charles Mondeh, Ibrahim Kapuwa, Mohamed Sheku, Philip Mattia, Brima Sesay, Jones O.A. Omoshoro-Jones, Motselisi Mbeki, Estie Cloete, Philip Anderson, Busi Mrara, Annemarie Steyn, Tsakani Mhlari, Nic Proctor, Caroline Robertson, Gillian Lamacroft, Usha Singh, Sebenzile Sikhakhane, Kelly Gate, Shepherd Nzenza, John Tshimbalanga Kasonga, Sibongile Ndebele, Patrick Lufuta Kande, Jody Davids, Tino-vito Orlandi, Marischka de Jong, Hugo Stark, Francois Roodt, Jonathan Hall, Ian Nortje, Akanimo Akpakan, Vishendran Govindasamy, Ronisha Sathiram, Mohammad Kathrada, Zane Farina, Lucio Frittella, Charles Kohler, Sibuyiselwe Lubelwana, Sarwat Ikram-Hameed, Adriaan Smit, Muneerah Cassiem, Yvonne Freeman, Saaliha Goga, Larissa Cronje, Constantin Buzdugan, Subash Chirkut, Priyadeshni Singh, Sandhya Jithoo, Vivesh Rughubar, John Arnold, Rishan Bipath, Suman Mewa Kinoo, Ncumisa Khanyisa Msolo, Fleur Ackermans-Deijnen, Tshegofatso Mmasello Emma Boka, Martyn Biccard Greenwood, Shakthi Anand Jayrajh, Devarani Naidoo, Syndrini Reddy, Devandiran Harriraman Rungan, Kylene Subrayen, John Roos, Nina Tredoux, Pascal Plumacher, Anthony Reed, Harald Steinhaus, Mariesa Nock, Paul Ryan Herselman, Gareth Davies, Talitha Harvey, Franklin Muller, Willem Naude, Tania Pretorius, Johan Jochemus Swart, Merryn Walls, Prashant Gokal, Nicolette Rorke, Farzaana Dhoodhat, Precious Dzanibe, Mohammed Yusuf Hussain, Ashmita Junpath, Ameela Maharaj, Hylda Makanisi, Khalid Moosa, Ting Ting Wong, Sean Mould, Trisha Ramsamy, Roel Matos-Puig, Hayley Morgan, Nadeem Nabeebuccas, Ria Devi Naidoo, Viantha Pather, Vasheel Vasheel Bahadur, Renilda Pillay, Zahnne Fullerton, Nicole Bell, Bongisa Grey, Vincent Lorenzo Visentin, Hendrik Adriaan Van Zyl, Terri Anne Killingbeck, Emile Maneveldt, Gerhard Thiart, Magdelena May Venter, Oostewalt Swart, Mariette Grobelaar, Carel Cairns, David Bishop, Christien Steenkamp, Thandekile Khumalo, Noel Naidoo, Ross Murray, Martin Kopieniak, Melusi Sishange, Mxolisi Brian Ndimande, Megan Jaworska, Sarwat Ikram, Bence Rainier, Renier J Liebenberg, Helena D Zwiegers, Philip M Nortje, Kamal Bhagwan, Margot Flint, Robert Dyer, Simone Adams, Yoshua Bwambale, Danny Ngomo, Patrice Kanku, Nivashen Pillay, Alexa de Castro, Atisha Maharaj, Janine Carim, Jenna Leigh Taylor, Karl M Köhne, Leanne W Drummond, Leanne Temlett, Lieze Geldenhuys, Yvonne Seilbea, Kathryn Naidoo, Nicola A Kalafatis, Stefné Verwey, Thulile Biyase, Theroshnie Kisten, Belinda S Kusel, Timothy Craig Hardcastle, Richard Magagula, Christian Kampik, Kuzolunga Xulu, Sivuyisiwe Solala, Mia Sayed, Basil Enicker, Anil Madaree, Innocent Mukama, Gladmore Madombwe, Nonhlanhla Zulu, Nompumelelo Gasa, Nokuzula Kanjana, Sebenzile Buthelezi, Thembelihle Buthelezi, Andries Brink, Francois Potgieter, Busisiwe Mrara, Zaynab Alexander, Charles Choto, Paula Ima, Zintle Gxagxisa, Baphethuxolo Ningiza, Gillian Lamacraft, Jerome Mogorosi, Nadia du Plessis, Leonie de Man, Suné Thompson, Gerrit van Heerden, Edwin W Turton, Pieter M van der Linde, Josephine K Teme-Pitse, Reitumetse Tladi, Gillian D Saffy, Ene-Mari Roscher, Kristel Fortune, George Barnard, Tiisetso Makhasane, Evan Bowen, Akangcha Pal, Rachel Moore, Maria Fourtounas, Mary Augusta Adam, Renessa Arumugan, Gabriella Hyman, Jaclyn Jonosky, Maninginingi Makondo, Heveshan Moodley, Phillip Munda, Mzwandile Nyalungu, Victor Olusola, Sohan Zane Pinto, Tristan Pillay, Lucinda Singh, Paul Mwindekuma Wondoh, John Devar, Boitumelo Baloyi-Mnisi, Zach Koto, Matlou Ernest Mabitsela, Sibongile Ruth Ndlovu, Branny Mthelebofu, Colin Beck, Matthew Dold, Alice Fan, Shannon MacQueen, Thembani Matabata, Catherine Mpehle, Charné Kulenkampf, Tsakani McCreath Mhlari, Simangele Cecilia Nyoka-Mokgalong, Felix Thumba Masinge, Randhir Ramnath Gunpath, Maropeng Petrus Pat Mothwa, Jo-Anne Asenath Mothwa, Danai Mhlanga, Jamie-Lyn Colly, Aunel Mallier Peter, Khalid Ben Hameda, Pulane Mokae, Stella Josephine Moumakoe, Kelechi Ekeh, Nezingu Lengo, Marnus Booyens, Inge Louise Seale, Pieter Daniel Theron, Nicolaas Abraham Schuman, Amber Carlyn Sonn, Jacobus Lukas Stander, Nadia Cloete, Marius Cloete, Catherine Ann Makepeace, Ronel van der Westhuizen, Leanne Robyn Messiahs, Amy Ruth Visagie, Fatima Vawda, Frans Christiaan Voster, Deepika Dhilraj, Oliver Smith, Stefan Bolon, Daniel Montwedi, Motsilisi Mbeki, Jayde Wyngaard, Mthunzi Ngcelwane, Thomas Kleyenstuber, Phyllis Phukubye, Liesel Schärf, Grace Laker, Elizabeth Semenya, Reinhard Dembskey, Thomas Tarlton, Tapiwa Jiri, Ngoie Hubert Mushid, Nhlanhla Samuel Ngwenya, Hazel Morongoa Mogodi, Carmen Sinevici, Anthony Osarogie Usenbo, Naledi Fodo, Anesu Chimini, Ntetelelo Sikobi, Sinovuyo Nokwange, Mluleki Noqhamza, Qumba Thembisa, Kajake Anantha Padmanabha Bhat, Rabin Mathew, Katrin Middleton, Abdus-sami Adewunmi, Craig Dickson, Humairah Bulbulia, Bianka Bester, Michelle de Klerk, Christia Benade, Francois Viljoen, Monique Fischer, Khalid Alfaki, Abdalmalik Awad, Abdelsalam Algray, Mohammed Elsiddig, Suha Mohamed, Salih Mahmoud, Muhammed Osman, Asia Elgailany, Mazin Suliman, Hanaa Mohammed, Lina Aljeally, Mohammed Dirar, Mohammed Osman, Mazin Mohamed, Mohamed Elhasan, Abrar Widatalla, Abubakr Abubakr, Eman Mohamed, Alshareef Nour, Ntonto Doris Gama, Dolorosa Khetsiwe Shabangu, Cynthia Iradikunda, Samuel Mkoko, Paul Kisanga, Emmanuel Lema, Benson Lyimo, Mohamed Binde, Alphonce Chandika, Salim Salim, Sylvia Jumbe, Abel Makubi, Vihar Kotecha, Felician Kachinde, Museleta Nyakiroto, Emmanuel Jitambi, Venant Geofrey, Johaphes Josiah, Phinius Makubi, Frank Manumbu, Suzan Mlingwa, Ernest Ibenzi, Peter Mbelle, Kato Peleus, Enid Chiwanga, Nillah Richard, Shoo Leonard, Paulo Sanka, Subira Mushi, Bashir Nyangasa, Mohamed Janabi, Naizihijwa Majani, Pedro Palangyo, Evarist Nyawawa, William Ramadhan, Faraj Lydenge, Gileard Gabriel Masenga, Sakina Rashid, Mubashir Jusabani, Ansbert Ndebea, Jenitha Cheru, Margaret Henjewele, Greyson Kilimanjaro, Sarah Sikimata, Deocles Donatus, Hazina Maduhu, Tumaini Mariro, Given Massasi, Moshi Moshi Shabani, Braison Cholela, Marco Mgeleka, Yohatinus Mbilinyi, Faraja Chiwanga, Bilton Exavery, Caspar Haule, Samson Ndile, Sirili Harya, Julieth Magandi, Deogratius Manyama, Redempta Matindi, Adam Moshi, Daudi Kitwana, Merida Makia, Philip Muhochi, Miriam Herman, Clauda Miombo, Furaha Kahindo, Langtone Kishebuka, Elijah Ussiri, Gloria Kinasa, Patrick Adel, Eric Malaba, Vensesla Sakwari, Sadot Lugereka, Mohamed Mungia, George Mocha, Herman Wella, Cecilia Protas, Patrick Karua, Ahmada Kashagama, Faraja Mwasambugu, Suzana Kajeri, Jacquiline Mchilla, Elibariki Lucumay, Robert Maise, Amon Marti, Beatrice Mahundi, Frederika Jager, Charles Majani, Ludovick Rukeha, Tareeq Mohamed, Nabila Fuad, Winifrida Halinga, Elias Chrisant, Gilbert Msoma, Titus Kihwili, Gadiel Temu, Naima Yusuf, Rashid Saleh, Rashid Inoja, Eva Shang'a, Stella Ibrahim, Hussein Msuma, Edwin Edward, Paul Kilamile, Stephen Mwakyolile, Talkana Adja, Edem Gueouguede, Hafoudhoi Oussene Seddoh, Saliou Adam, Pilakimwe Egbohou, Mawunyo Ahomagnon, Olivier Kadjossou, Abdul-Bassiti Boukari, Mary T Nabukenya, Ruth Muhindo, Peter Waswa, Peter Kaahwa Agaba, Daphne Kabatoro, Joseph Kayong, Margaret Naggujja, Nabasiige Rehema, Phiona Nansubuga, Daniel Kavuma, Aggrey Lubikire, Hope Bisilikirwa, Godfrey Ssebaggala, Emmanuel Muwema, Humble Joan Agaba, John Kiconco, Nicholas Wataaka, Bonet Chan, Mary Juliet Nampawu, Fred Bulamba, Emmanuel Bua, Christine Mugala, Caroline Nyakato, John Paul Ochieng, Linda Kyomuhendo Jovia, George Kateregga, Rachel Alum, Lazia Najjuma, Gorret Nampiina, Andrew Kintu, Joshua Sempiira, Luzige Simon, Peter Kayima, Jacob Eyul, Erick Odwar, Rita Nkwine, Christine Namata, Elizabeth Nabakka, Denis Kakaire, Velda Mushangwe-Mtisi, Erisha Munhamo, Celestino Dhege, Juliet Hungwa, Hemish Jasi, Crispin Ntoto, Derek Matsika, Brightson Mutseyekwa, Joseph Zimbovoora, Beaulah Gudyanga, Dennis Mazingi, Chenesa Mbanje, Busisiwe Mlambo, Michael Chiwanga, Harunavamwe N Chifamba, Sarudzai Zhou, Esta Hove, Shamiso Dende, Beauty Manjengwa, Penias Kapisa, null Mashava, Caritas Chiura, Locadia Katsukunya, Godfrey Muguti, Doreen Mashava, Elton Ndhlovu, Zanele Mangwangwa, and Nombulelo Dube

Subjects
Adult, medicine.medical_specialty, Standard of care, business.industry, Psychological intervention, MEDLINE, Standard of Care, General Medicine, Articles, Hospitals, Hospitalization, Intervention (counseling), Relative risk, Emergency medicine, Africa, medicine, Humans, In patient, Female, Cluster randomised controlled trial, Postoperative Period, business, Surgical patients
Abstract

Summary Background Risk of mortality following surgery in patients across Africa is twice as high as the global average. Most of these deaths occur on hospital wards after the surgery itself. We aimed to assess whether enhanced postoperative surveillance of adult surgical patients at high risk of postoperative morbidity or mortality in Africa could reduce 30-day in-hospital mortality. Methods We did a two-arm, open-label, cluster-randomised trial of hospitals (clusters) across Africa. Hospitals were eligible if they provided surgery with an overnight postoperative admission. Hospitals were randomly assigned through minimisation in recruitment blocks (1:1) to provide patients with either a package of enhanced postoperative surveillance interventions (admitting the patient to higher care ward, increasing the frequency of postoperative nursing observations, assigning the patient to a bed in view of the nursing station, allowing family members to stay in the ward, and placing a postoperative surveillance guide at the bedside) for those at high risk (ie, with African Surgical Outcomes Study Surgical Risk Calculator scores ≥10) and usual care for those at low risk (intervention group), or for all patients to receive usual postoperative care (control group). Health-care providers and participants were not masked, but data assessors were. The primary outcome was 30-day in-hospital mortality of patients at low and high risk, measured at the participant level. All analyses were done as allocated (by cluster) in all patients with available data. This trial is registered with ClinicalTrials.gov , NCT03853824 . Findings Between May 3, 2019, and July 27, 2020, 594 eligible hospitals indicated a desire to participate across 33 African countries; 332 (56%) were able to recruit participants and were included in analyses. We allocated 160 hospitals (13 275 patients) to provide enhanced postoperative surveillance and 172 hospitals (15 617 patients) to provide standard care. The mean age of participants was 37·1 years (SD 15·5) and 20 039 (69·4%) of 28 892 patients were women. 30-day in-hospital mortality occurred in 169 (1·3%) of 12 970 patients with mortality data in the intervention group and in 193 (1·3%) of 15 242 patients with mortality data in the control group (relative risk 0·96, 95% CI 0·69–1·33; p=0·79). 45 (0·2%) of 22 031 patients at low risk and 309 (5·6%) of 5500 patients at high risk died. No harms associated with either intervention were reported. Interpretation This intervention package did not decrease 30-day in-hospital mortality among surgical patients in Africa at high risk of postoperative morbidity or mortality. Further research is needed to develop interventions that prevent death from surgical complications in resource-limited hospitals across Africa. Funding Bill & Melinda Gates Foundation and the World Federation of Societies of Anaesthesiologists. Translations For the Arabic, French and Portuguese translations of the abstract see Supplementary Materials section.

Published
2021

10. Reação de híbridos comerciais de milho ao carvão do topo

Author

Armando Corrêa Pacheco and Renato Cezar Dittrich

Subjects
Sphaceloteca, resistência à doenças, Zea mays, Agriculture (General), S1-972
Abstract

0 objetivo deste trabalho foi avaliar a reação dos milhos híbridos recomendados para cultivo em Santa Catarina, frente ao carvão do topo, em condições de solo naturalmente infestado com S. reiliana.

Published
2023

11. Los papeles del Caribe

Author

Armando Correa and Armando Correa

Abstract

Libre. Independiente. Peligrosa. Intentaron controlarla. Y ahora los destruirá. La trama de esta novela gira en torno a las relaciones que sostuvieron la CIA y la DEA con el general Noriega para facilitar el lavado de dineros del narcotráfico en su país. En los años 80, durante su periodo como director de la DEA, Frederick McLean, vicepresidente de los Estados Unidos y candidato a la Presidencia, avala el acercamiento de esta agencia con el gobierno de Noriega para poner en marcha un proceso de lavado de dineros provenientes del narcotráfico, mediante un complejo sistema de triangulación bancaria. El propósito de esta negociación es acallar las acusaciones de la oposición panameña sobre las relaciones del general con la mafia colombiana y legitimar su inmensa fortuna, con el fin de mantenerlo como aliado en el poder y fortalecer la presencia norteamericana en la región. Sin embargo, una investigación adelantada 20 años más tarde por un senador norteamericano pone al descubierto el oscuro entramado que llevará al general Noriega a prisión y acabará con la carrera política del vicepresidente McLean

Published
2015

12. Prolonged Detection of Zika Virus in Vaginal Secretions and Whole Blood

Author

Lilin Lai, Rebecca Berry, Shital M. Patel, Mark J. Mulligan, Muktha S Natrajan, Anna R Carlson, Kjersti Aagaard, Armando Correa, Kristy O. Murray, Melissa N. Garcia, and Rodion Gorchakov

Subjects
0301 basic medicine, Time Factors, Epidemiology, viruses, Expedited, lcsh:Medicine, Zika virus, 0302 clinical medicine, Chlorocebus aethiops, 030212 general & internal medicine, vaginal secretions, Whole blood, Travel, virus isolation, biology, Reverse Transcriptase Polymerase Chain Reaction, Zika Virus Infection, traveler, Dispatch, urine, 3. Good health, Infectious Diseases, medicine.anatomical_structure, PCR, natural history, Vagina, RNA, Viral, Female, Prolonged Detection of Zika Virus in Vaginal Secretions and Whole Blood, prolonged detection, Microbiology (medical), Adult, Virus isolation, Virus, virus shedding, lcsh:Infectious and parasitic diseases, 03 medical and health sciences, medicine, Animals, Humans, lcsh:RC109-216, Viral shedding, Saliva, Vaginal secretion, Vero Cells, lcsh:R, whole blood, biology.organism_classification, Virology, United States, infection, 030104 developmental biology, Honduras, Culture Media, Conditioned, Immunology, erythrocytes
Abstract

Infection with Zika virus is an emerging public health crisis. We observed prolonged detection of virus RNA in vaginal mucosal swab specimens and whole blood for a US traveler with acute Zika virus infection who had visited Honduras. These findings advance understanding of Zika virus infection and provide data for additional testing strategies.

Published
2016

13. Gomose dos citros no Oeste Catarinense

Author

Luiz Augusto Ferreira Verona, Armando Corrêa Pacheco, and Giovanina Fontanezzi Huang

Subjects
Phytophthora, citrus, Agriculture (General), S1-972
Abstract

A gomose, também conhecida como Phytophthora, é uma das doenças mais comuns nos pomares cítricos do Oeste Catarinense. Sua importância é grande porque causa redução de produtividade e morte de plantas. A necessidade de replantio em plantas de pomares, na Região Oeste Catarinense, devido a problemas fitossanitários, é estimada em 5,0%, principalmente nos pomares em formação até o quarto ano, sendo que somente a reposição de plantas com gomose é de 2 a 3%.

Published
2023

14. Risk assessment methodology for paste and thickened tailings

Author

G. Martínez, Rocío Luiña Fernandez, Owain Morton, Jesús Laine, Ana Fernández-Iglesias, and Armando Correa De Araujo

Subjects
Dam failure, Engineering, Risk analysis (engineering), Work (electrical), Catastrophic failure, business.industry, Process (engineering), Sustainability, Forensic engineering, business, Risk assessment, Tailings, Risk management
Abstract

According to the database compiled by the US Commission on Large Dams (USCOLD) and completed later by the International Commission on Large Dams (ICOLD) and the US Environmental Protection Agency (EPA), there have been two or more major tailing dam failure incidents per year between 1970 and 2000, proving that these catastrophic failure events are not rare occurrences. Paste and thickened tailings (P&TT) technology has emerged in recent years as a promising technique to avoid dam incidents. Due to the low water content of the P&TT, the potential for liquefaction is reduced drastically in comparison to conventional tailing dams. This is one of the major advantages of the technology, alongside the volume reduction and the absence of bleed water. However, paste also has some drawbacks such as higher energy consumption and extra equipment requirements. Due to these advantages and drawbacks, a set of different tools is required to assess the feasibility of a paste facility at a specific mine. Among these tools, those related to risk become important since one of the major advantages of paste is related to this dimension. Thus, selecting the right tool for analysis is a key factor in the decision-making process that may lead to the selection of P&TT as an alternative to conventional tailings storage. According to the AS/NZS 4360:2004 ‘Risk Management’ (Standards Australia 2004), developing a risk assessment involves a three-stage process: identify, analyse and evaluate all the risks involved. The best tool to provide structure for these stages is a failure modes and effect analysis (FMEA) of the tailings system. In the present work, a general comparison between P&TT and conventional tailings storage has been made in terms of risk, using a FMEA based on a classification of likelihood and consequences in a semi-quantitative risk assessment. All risks for stages from the concentration plant onwards are considered for each scenario, in two different categories: environmental and public safety. Paste and thickened tailings technology has more risks classifying as low to moderate than conventional tailings and has less risks classifying as moderate to high area. These results can be used as an indication of the sustainability of P&TT disposal in terms of risks. Although the goal of the study is to make a general comparison not applied to any specific mine, it can also be used as a methodology or template for a risk assessment for any existing installation.

Published
2015
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15. Introducción a la correlación in vivo-in vitro: Parte II

Author

Dayamí Carrión Recio, Carlos Alberto González Delgado, Lourdes Olivera Ruano, and Armando Correa Fernández

Subjects
CONTROL DE CALIDAD, lcsh:Therapeutics. Pharmacology, QUALITY CONTROL, lcsh:RM1-950, QUIMICA FARMACEUTICA, CHEMISTRY, PHARMACEUTICAL
Abstract

Se relacionaron los pasos generales para obtener una correlación in vivo-in vitro. Se profundizó en las ventajas que tiene la obtención de una correlación de nivel A sobre las de niveles B y C. Se explicó detalladamente cómo establecer correlaciones a cada uno de los niveles y en el caso del nivel A, cuando la velocidad de disolución es dependiente e independiente de las condiciones de prueba. Se ejemplificaron las áreas de aplicación de la correlación in vivo- in vitro y su introducción en el proceso de escalado, para productos de liberación modificada. Se concluye que el trabajo adecuado con las variables de manufactura, la optimización de la metodología de disolución y el estudio in vivo, son las herramientas esenciales para establecer una correlación a cualquiera de sus niveles.The general steps taken to obtain an in vivo-in vitro correlation are reported in this paper. The advantages of obtaining an A level correlation over those of B and C levels are deeply explained. Details are given about how to establish correlations at each level and, specifically, in the case of A level when the dissolution speed depends or not on the test conditions. The areas of application of the in vivo and in vitro correlation, as well as its introduction in the scale-up process for products of modified release are illustrated. it is concluded that and adequate work with the manufacture variables, the optimization of the dissolution methodolody and the in vivo study are the essential toools to establish a correlations at any level.

Published
1999

16. Bioequivalencia: Introducción a la correlación in vivo-in vitro. Parte I

Author

Dayamí Carrión Recio, Carlos Alberto González Delgado, Lourdes Olivera Ruano, and Armando Correa Fernández

Subjects
CONTROL DE CALIDAD, lcsh:Therapeutics. Pharmacology, VIAS DE ADMINISTRACION DE MEDICAMENTOS, DRUG ADMINISTRATION ROUTES, THERAPEUTIC EQUIVALENCY, QUALITY CONTROL, lcsh:RM1-950, EQUIVALENCIA TERAPEUTICA
Abstract

El control de calidad sugerido por la farmacopea, para formas de dosificación oral, no asegura en muchos casos la bioequivalencia de todos los lotes que salen al mercado, por lo que se discutieron las causas que provocan esta deficiencia, entre las que se encuentran: la selección inadecuada de las especificaciones y condiciones de disolución y subestimar la influencia de las variables de manufactura críticas en el comportamiento de las formulaciones. Además, se estimuló el establecimiento de las correlaciones in vivo-in vitro, como la solución más aceptada internacionalmente para garantizar la calidad lote a lote. Se expusieron también las definiciones de correlación in vivo-in vitro y niveles de correlación propuestos. En las conclusiones se enfatizó la importancia que tiene el establecimiento, ajuste y control de las variables críticas y la obtención de una correlación in vivo-in vitro para determinar las especificaciones de disolución in vitro adecuadas.The quality control suggested by Pharmacopeta for oral donage forms does not assure in many cases the bioequivalence of products going to the market, therefore, causes of this defficiency such as poor selection of dissolution specifications and conditions, and underestimation of the influence of critical manufacturing variable over the performance of formulations were discussed. In vivo - in vitro correlations were encouraged to be set since this is the most acceptable solution worldwide for guaranteeing batch per batch quality. Also, the definitions of in vivo in vitro correlations and proposed correlation levels were presents. The importance of setting, adjustment and control of critical variables together with the obtained in vivo - in vitro correlation to determine adequate in - vitro dissolution specifications were underlined in the conclusions.

Published
1999

17. Study of environmental feasibility of paste and thickened tailings by life-cycle assessment

Author

Armando Correa De Araujo, Rocío Luiña Fernandez, Wen Xuan, Jose Valeriano Alvarez Cabal, Sara Andrés, and Ana Fernández-Iglesias

Subjects
Scarcity, Waste management, Impact assessment, Process (engineering), media_common.quotation_subject, Environmental science, Environmental impact assessment, Energy consumption, Tailings, Life-cycle assessment, Natural resource, media_common
Abstract

Paste and thickened tailings (P&TT) technology has important advantages not only from the safety point of view, but especially from the environmental point of view. The objective of this paper is to prove that this technology is a real sustainable alternative that can be evaluated using life-cycle analysis (LCA) methodology. P&TT has emerged in recent years as an alternative for the treatment and disposal of mine waste. It involves thickening the tailings (a mix of process water and waste solids obtained after the process of separating the gangue of an ore) to a higher solid content, recovering the water, and recycling it back to the process. The volume of the final waste once it has been thickened is smaller and requires less storage capacity. Conventional tailings disposal has some important disadvantages such as poor water recovery, high volume storage requirements, the need for containment structures like basins or dams (which can present stability and safety issues), and lower rehabilitation potential. Thickening technologies applied to tailings, in order to reach solid concentrations over 50%, are a real alternative to traditional disposal techniques. Scarcity of water and increasing demand for higher recycling rates can be partially solved, pollution and seepage problems are avoided, smaller containment facilities are required, and footprint is reduced due to smaller land needs, even allowing partial rehabilitation while the mine is still under operation. Besides these important benefits, P&TT technologies require specific equipment and important energy consumption, with associated economic costs and environmental impacts. In order to evaluate them, a standardised tool should be used. This tool is the LCA, which allows calculating the potential environmental impact of an activity such as tailings thickening process during its whole lifecycle, quantifying the use of natural resources and the impacts on the evaluated system. The International Organization for Standardization (ISO) defines LCA as a technique for assessing the potential environmental aspects and potential impacts associated with a product, process, or activity by compiling an inventory of relevant inputs and outputs, evaluating the potential environmental impacts associated with those inputs and outputs, and interpreting the results of the inventory and impact phases in relation to the objectives of the study. The selection of LCA as an evaluation methodology for this study is due to the strong presence of this kind of tool in the environmental literature in the last several years. Its implementation has been fast, and several databases and software programs adequate for the inventory and impact assessment phases have been developed.

Published
2013
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18. Studying feasibility of paste and thickened tailings at laboratory scale – pilot thickeners

Author

M Goosens, Ana Fernández-Iglesias, and Armando Correa De Araujo

Subjects
Arithmetic underflow, Piping, Settling, Process (engineering), business.industry, Batch processing, Beneficiation, Gangue, Environmental science, Process engineering, business, Tailings
Abstract

Thickening tailings until they reach a paste-consistency configuration is a process involving many factors. Lab scale work is required prior to studying the feasibility of paste thickening technologies for a given tailings. The global objective is to determine if a representative sample of non-thickened tailings can be engineered at laboratory scale to make paste; this work and its results will help determine the feasibility of the thickening process and the potential paste characteristics at industrial scale. This document aims to justify the need for this lab scale work and to provide information regarding lab scale paste thickeners by presenting the experiences obtained with an experimental lab-scale thickener. Studying the feasibility of a paste and thickened tailings (P&TT) alternative for a mine requires different types of laboratory and pilot scale tests. Many parameters and factors will affect the viability of these technologies for a given case. If we examine the most widely accepted theory, it seems that global design should flow ‘upstream’, starting from the storage area characteristics, stepping back to the piping requirements, and finally defining the thickening process to suit the required characteristics of the underflow. The characteristics of tailings are probably the most important of the factors affecting the viability of the whole process. Location determines the climate, and especially the geological and mineralogical properties of the deposits, but tailings should not be considered as a natural material. They are a waste product of the mining process and are affected by several other parameters: the process used to separate the gangue from the ore, the chemicals added during these processes, the characteristics of the water used, etc. Even during the lifetime of a mine, the tailings characteristics may change due to evolution of the mineral grade and the associated beneficiation process. All these arguments make tailings processing not only site dependant, but also time dependant. The design of a PT not all tailings are amenable to being ‘engineered’ to reach paste consistency. Even if they are, there are several parameters that can be modified, such as additives, dosage, solids percentage, rheological properties, etc. Thickener design should adapt to these requirements. However, few reference documents with procedures to design these pieces of equipment are available. It seems clear that producing paste at lab scale is imperative in order to have a first idea of how the tailings will behave after being thickened. In order to do this, having a bench scale thickener seems to be a good alternative. Static settling tests do not seem to resolve the need to determine underflow solid concentrations and overflow water characteristics. There is no reference bibliography to construct pilot units; in this study, an experimental column of 9 cm diameter is tested, operating in batch mode, providing a solid concentration for further tests.

Published
2013
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20. Los Índices de Calidad del Aire: Alcances y Limitaciones

Author

Armando Correa García

Subjects
IMECA, Contaminación atmosférica, índices de calidad del aire, AQI, función lineal, Ingeniería, PSI, traslape
Abstract

En este trabajo se revisa el método de cálculo IMECA y los cambios realizados del mismo, como resultado de la publicación en el 2006 del reglamento IMECA para el Distrito Federal. Entre otros resultados se concluye que la técnica vigente para elaborar el reporte IMECA difiere poco con respecto del método propuesto inicialmente. Por otra parte, las modificaciones efectuadas a este índice, provienen de los cambios realizados en 1999 al Pollution Standard Index (PSI). Actualmente conocido como Air Quality Index (AQI).

Published
2011

21. Bioequivalencia de una formulación cubana de carbamazepina con el producto líder

Author

Alejandro Saúl Padrón Yaquis, Narda María Jiménez Alemán, Jorge Ernesto Calero Carbonell, Carlos A González Delgado, Armando Correa Fernández, Lourdes Olivera Lluano, and Alina Díaz Machado

Subjects
bioequivalence, Carbamazepine, lcsh:Therapeutics. Pharmacology, Tegretol, lcsh:RM1-950, bioequivalencia, Carbamazepina
Abstract

Se demostró la intercambiabilidad terapéutica mediante un estudio de bioequivalencia en 25 voluntarios sanos de una formulación cubana de carbamazepina de 200 mg con respecto al producto innovador (Tegretol®), en condiciones de administración a dosis única; el diseño experimental fue cruzado a doble ciegas y aleatorizado; el periodo de lavado fue de 15 días. Las extracciones para la obtención del plasma, se realizaron a las 0; 0,5; 1; 1,5; 2; 3; 4; 6; 8; 10; 12; 16; 20; 24; 48; 72; 96 y 120 h. Para el análisis se empleó un método analítico por cromatografía líquida de alta eficiencia, isocrático en fase reversa con detección ultravioleta. Se estimaron mediante técnicas "no compartimentales" los parámetros farmacocinéticos (AUC0-t, AUCt-¥, Cmax, Tmax y T1/2) representativos de la biodisponibilidad en magnitud y velocidad. Sobre la base de los resultados estadísticos, ambas formulaciones resultaron bioequivalentes.

Published
2009

22. Bioequivalence of two recombinant interferon alpha-2b liquid formulations in healthy male volunteers

Author

Joel Ferrero-Bibilonia, Pedro Lopez-Saura, Lourdes Olivera-Ruano, Carmen M Valenzuela-Silva, Carlos A. González-Delgado, Idrian García-García, Majel Cervantes-Llano, Jorge Duconge, Armando Correa-Fernandez, Francisco Hernández-Bernal, and Ramon Soto-Hernandez

Subjects
Adult, Male, Chemistry, Pharmaceutical, Antineoplastic Agents, Pharmacology, Bioequivalence, Interferon alpha-2, Antiviral Agents, Young Adult, Pharmacokinetics, Double-Blind Method, Interferon, medicine, Humans, Cross-Over Studies, Recombinant interferon, Temperature, A protein, Interferon-alpha, Crossover study, Recombinant Proteins, Blood Cell Count, Clinical trial, Therapeutic Equivalency, Pharmacodynamics, Area Under Curve, Data Interpretation, Statistical, Immunology, beta 2-Microglobulin, medicine.drug, Half-Life
Abstract

Interferon (IFN) alpha-2b is a protein with antiviral, antiproliferative and immunoregulatory properties that is approved for several clinical indications. A new liquid, albumin-free, IFNalpha-2b formulation has recently been developed. This study aimed to evaluate the equivalence of the pharmacokinetic, pharmacodynamic and safety properties of the new formulation with a reference one in healthy male volunteers.A randomised, crossover, double-blind study with a 3-week washout period was performed in which Heberon Alfa R (formulation A) and Viraferon (formulation B) were compared. A single 20 x 10(6) IU IFNalpha-2b dose was administered subcutaneously to 14 apparently healthy male subjects. Serum IFN level was measured over 48 hours by enzyme immunoassay (EIA) and by antiviral activity titration. Clinical and laboratory variables were determined, as were pharmacodynamic and safety criteria.Groups were homogeneous with regard to all demographic and baseline variables. Pharmacokinetic comparison by EIA did not show differences between the formulations: area under the curve (AUC) 2572 versus 2561 ng x h/L, maximum plasma concentration (Cmax) 318 versus 354 ng/L, time to Cmax (tmax) 8.2 versus 8.5 h, elimination half-life (t(1/2)) 5.87 versus 6.08 h, terminal elimination rate (lambda) 0.122 versus 0.118 h(-1), and mean residence time (MRT) 10.9 versus 12.0 h for formulations A and B, respectively. The differences never reached 20%, which is the clinically significant threshold. The 90% confidence interval of the ratio between them was in all cases within the 0.8, 1.25 range. The two formulations were clinically equivalent with regard to serum IFN antiviral activity titration (0.8, 1.25 criterion) regarding their pharmacokinetic parameters. There were no significant differences with respect to the pharmacodynamic variables: serum beta2-microglobulin and temperature increase. Heart rate and blood pressure changes did not differ either. Both products provoked similar haematological count decreases and had similar safety profiles. The most frequent adverse reactions were fever, tachycardia, headache and arthralgias.The overall analysis strongly suggests the bioequivalence of these two products.

Published
2004

24. A report of cutaneous tuberculosis in siblings

Author

D O Edwina Popek, Denise Metry, Jeffrey Starke, M.P.H. Edward A. Graviss Ph.D., Armando Correa, Xi Pan, and Janna Nunez-Gussman

Subjects
Pathology, medicine.medical_specialty, Tuberculosis, Cutaneous tuberculosis, medicine.diagnostic_test, business.industry, Antitubercular Agents, Dermatology, medicine.disease, Polymerase Chain Reaction, law.invention, Diagnosis, Differential, El Niño, law, Pediatrics, Perinatology and Child Health, Skin biopsy, medicine, Humans, Female, Sibling, business, Child, Positive staining, Tuberculosis, Cutaneous, Polymerase chain reaction
Abstract

Cutaneous tuberculosis is rarely seen in the United States, and we are unaware of any reports of siblings sharing the diagnosis. We report an instance of cutaneous tuberculosis affecting two sisters. The first sibling had skin biopsy specimen findings suggestive of an infectious source, but special stains and cultures were negative. Only with further evaluation using polymerase chain reaction (PCR) was the diagnosis established. The second sibling had positive staining for acid-fast bacilli, though her cultures were also negative. A high level of suspicion for tuberculosis should be maintained in otherwise healthy children with nonspecific, granulomatous disorders of the skin. PCR may be a useful tool for selected cases in which a high level of clinical suspicion exists, but special stains and cultures are negative.

Published
2003

25. Tuberculosis among adult visitors of children with suspected tuberculosis and employees at a children's hospital

Author

Flor M. Muñoz, Lydia T. Ong, Diane Seavy, Denise Medina, Armando Correa, and Jeffrey R. Starke

Subjects
Microbiology (medical), Adult, Family Health, Male, Cross Infection, Infectious Disease Transmission, Patient-to-Professional, Adolescent, Epidemiology, Tuberculin Test, Antitubercular Agents, Infant, Visitors to Patients, Hospitals, Pediatric, Texas, Patient Isolation, Personnel, Hospital, Infectious Diseases, Child, Preschool, Humans, Tuberculosis, Female, Child
Abstract

Objective:Few children with tuberculosis (TB) have communicable disease, and most do not require isolation within the hospital. However, parents or adult visitors with unrecognized pulmonary TB may be a threat to hospital staff and other patients. We prospectively evaluated adults accompanying children hospitalized for suspected TB at a children's hospital to determine the frequency of undiagnosed, potentially contagious disease.Methods:From 1992 to 1998, chest radiographs were obtained from adult caretakers accompanying 59 consecutive children admitted to Texas Children's Hospital with suspected TB. A child and his or her family were placed under Airborne Precautions only if the child or the accompanying adult exhibited characteristics of potentially contagious disease. Annual rates of tuberculin skin test conversion in hospital employees were obtained for the same period.Results:Of the 105 screened adults, 16 (15%) had previously undetected pulmonary TB. These adults were associated with 14 (24%) of the 59 children. In all instances in which the adult was the patient's parent, he or she was the source of infection to the child. Only 8 (13.5%) of the 59 children required isolation. Tuberculin skin test conversion from a negative to a positive reaction occurred in 127 employees (8 per 1,000 employee-years at risk). Only 4 of these 127 employees performed activities involving direct patient contact. None was in contact with families with a known potentially contagious adult or pediatric patient.Conclusions:The risk of infection of healthcare workers from pediatric patients with primary TB appeared to be minimal, and most children with TB did not need isolation. Infection control efforts should be focused on accompanying adults and adult visitors. (Infect Control Hosp Epidemiol 2002;23:568-572).

Published
2002

26. Primary deep venous septic thrombophlebitis in a child

Author

E. Sami Arisoy, Armando Correa-Calderón, and Sheldon L. Kaplan

Subjects
Male, medicine.medical_specialty, medicine.drug_class, Antibiotics, Femoral artery, Iliac Vein, medicine.disease_cause, Thrombophlebitis, medicine.artery, medicine, Humans, Septic thrombophlebitis, Child, Hepatitis, business.industry, Thrombosis, Femoral Vein, Staphylococcal Infections, medicine.disease, Surgery, El Niño, Staphylococcus aureus, Anesthesia, Pediatrics, Perinatology and Child Health, Complication, business
Abstract

We describe a 12-year-old boy in whom primary Staphylococcus aureus thrombophlebitis of the femoral and iliac veins developed without history of trauma and with no association with acute osteomyelitis. The patient responded to therapy with intravenously administered antibiotics for 6 weeks, although oxacillin-associated hepatitis developed during the course of treatment. (J P ediatr 1994;124:439-41)

Published
1994

29. A Aparência, o Ser e a Forma - Geografia e Método

Author

Armando Corrêa da Silva

Subjects
abstração, revolução tecnológica, método geográfico, Geography (General), G1-922
Abstract

Resumo Este texto analisa o método geográfico, suas mudanças e novos conceitos em uma época de transformações tecnológicas globais e de novos padrões de orga-nização espacial. Palavras-chave: abstração, revolução tecnológica, método geográfico. Abstract This text analyses the geographycal method, its changes and new concepts in times of global technological transformations and new space organization patterns. Keywords: abstraction, technological revolution, geographycal method

Published
2009
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32. Software e valor

Author

Armando Corrêa da Silva

Subjects
Software, Valores., Geography (General), G1-922
Abstract

Em 1990, 1° semestre, elaborei um Programa intitulado "Prospectiva Epistemológica-Tecnológica da Organização do Espaço e do Meio ambiente. Projetos Interdisciplinares. Geografia Humana", que tem como tema O FUTURO DO HOMEN E DO ESPAÇO NA DÉCADA DE 90. O esboço preliminar tem o título "Espaço, Forças Produtivas, Tecnologia e Geografia". No total, são 29 Projetos, dos quais este é o primeiro. Trata-se, então, de um comentário ao seu conteúdo e a relação de uma bibliografia preliminar. E o que é possível fazer, agora, na fase em que se encontra introspecção futura. Assim, comento, a seguir, cada um dos itens do projeto, o que pode revelar seu conteúdo e permitir selecionar alguma bibliografia.

Published
2011
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33. VALIAÇÃO DE GRÃOS ARDIDOS EM 32 HÍBRIDOS DE MILHO EM CAMPO ERÊ-SC

Author

ARMANDO CORRÊA PACHECO and RENATO CÉSAR DITTRICH

Subjects
zea mays, fusarium moniliforme, diplodia maydis, Agriculture, Agriculture (General), S1-972
Abstract

A qualidade do milho comercial em Santa Catarina vem merecendo maior atenção devido a sua importância como componente de rações para animais e para alimentação humana. O "grão ardido" é um complexo de sintomas em grãos de milho que pode indicar a presença de fungos. No município de Campo EM (SC), 32 híbridos foram avaliados para intensidade de grãos ardidos e apresentaram um gradiente de 5,29% até 41,74%. Foram identificados e quantificados entre os principais fungos veiculados aos grãos: E moniliforme com 53,25% e D. maydis com 56,75%.

Published
1997

34. Metropolis and reasons of technical reasons

Author

Armando Corrêa da Silva

Subjects
Technique, metropolis, function, person, mentality, Geography. Anthropology. Recreation, Geography (General), G1-922
Abstract

Author says in this paper that function preponders over mouvement. Science and Philosophie do not refer more totatlity but only to a part of the whole. Relations became more important than things. The matter here is discussed about the social and metropolis

Published
1999
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42. Cidade, como te ver?

Author

Gloria da Anunciação Alves, Ana Fani Alessandri Carlos, Mauricio Almeida de Abreu, and Armando Correa da Silva

Abstract

A construção do espaço urbano está relacionada com o processo de produção e reprodução das relações sociais e produtivas do mundo capitalista. Esse processo revela-se contraditório e está pautado na inter-relação entre a destruição/construção material e social, principalmente das grandes cidades. Nesse processo, que se reproduz no cotidiano das pessoas nas grandes cidades, estabelece-se uma rotina que, ao mesmo tempo que parece manter a ordem estabelecida, destrói-se na própria repetição, criando o novo, o moderno, e, exige, que se desvendem as contradições encobertas nas relações diárias, que se manifestam espacialmente de varios modos: na arquitetura, na cidade, nas imagens produzidas na e pela cidade. Dentre as varias imagens possíveis, restringiremo-nos neste trabalho aquelas produzidas na e através da tv. Que cidade constrói-se por essas imagens, qual o sentido da vida urbana que passa nas telas da tv? essa é a proposta de análise deste trabalho Not available

Published
2023
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43. Uma utopia geográfica? Um novo homem para uma nova sociedade

Author

Carlos Eugenio Mottana, Maria Cecilia Franca, Manoel Correa de Andrade, Renato Janine Ribeiro, Miguel Cezar Sanchez, and Armando Correa da Silva

Abstract

Esta dissertação discute a construção do ser e sobretudo suas contradições históricas, cristalizadas no presente. Busca desmaterializar a estreiteza das noções econômicas, dos sectarismos nacionais e de grupos de dominação que manipulam expectativas, remetendo ao futuro as mais simples aspirações das maiorias. Trata das limitações estruturais dos modelos miméticos que valorizam as aquisições e o progresso escamoteando as prioridades sociais que possam conduzir a liberdade da autonomia e a igualdade teórica dos possíveis desiguais. Intenta de reduzir a complexidade da aparelhagem ideológica e remete a uma nova construção socio-espacial harmônica sob o tripe do pacto conciliatório da compensação-democracia-ecologia. Insere, pois a participação politica plena da comunidade no dia a dia desta construção. Abre proposições, para a discussão social ampla, interagindo o utópico ao concreto, cabendo a sociedade sua qualificação. A reforma social e econômica insere-se a reforma agraria, salientando o que pode conter além de sua especificidade, dentro do tratamento da totalidade dialética. Contribui, pela metodologia e técnica geográficas, nas avaliações e para síntese do momento das questões relevantes. Enfatiza a participação e a interdisciplinaridade nas ações políticas e pragmáticas para a elaboração de um novo espaço, por um novo homem para uma nova sociedade Not available

Published
2022
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44. Não disponível

Author

Amelia Luisa Damiani, Manoel Fernando Goncalves Seabra, Pedro Pinchas Geiger, Murillo de Azevedo Marx, Milton Almeida dos Santos, and Armando Correa da Silva

Abstract

Trata-se da leitura das estratégias politicas que dominaram a realização das cidades ordenadas - os grandes conjuntos habitacionais - no corpo da ditadura militar nos pais. As cidades ordenadas são as cidades das necessidades básicas, em princípio, satisfeitas. São as cidades das necessidades elementares. Cidades que não deixam de estar sob o controle do estado. A forma urbana dos conjuntos habitacionais, aquela que se adequa as propostas politicas maiores, carrega o traco da arquitetura moderna, já no processo de sua vulgarização. A funcionalização do espaço, sua hierarquização torna-se possível no interior desse conhecimento. Não se trata, a rigor, de uma crítica a arquitetura moderna, pois estamos diante de sua produção grosseira, mas do entendimento das consequências de um pensamento-ação nos limites de sua generalização-vulgarização. Desvendamos o projeto urbano de Itaquera I, um grande conjunto, já consolidado em São Paulo, demonstrando a inserção da autoridade, e seus prepostos, como facie possível do projeto Não disponível

Published
2022
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46. Beneficiamento do caulim duro das bacias dos rios Capim e Jari através do processo de agregação seletiva

Author

Paulo Sergio Rueda Criscuolo, Armando Correa de Araujo, George Eduardo Sales Valadao, Lino Rodrigues de Freitas, and Milton Luiz Laquintinie Formoso

Subjects
Tecnologia mineral, Rio saci, Saparação magnética, Caulim, Agregação seletiva, Engenharia de minas, Engenharia metalúrgica, Rio capim
Abstract

A cada ano que passa, o mercado papeleiro tem exigido cargas cada vez mais nobres. No caso dos papéis revestidos, a demanda por caulins com alvura cada vez mais alta tem aumentado, o que vem se tornando num desafio cada vez maior para os respectivos produtores, principalmente os de caulins finos. Sabe-se que, quanto mais finoo caulim, mais finos são os seus contaminantes, e por causa disso o processo de beneficiamento torna-se cada vez mais complicado e de alto custo. Como os processos de beneficiamento convencionais de caulins geralmente requerem minérios de alta alvura para a obtenção de produtos de alta alvura, e a quantidade de minérios de alta alvura disponível geralmente é muito pequena, a comercialização desses caulins de alta alvura tem apresentado margens de lucro cada vezmenores, chegando até a se tornar inviável em alguns casos.A proposta deste trabalho foi então de desenvolver um processo debeneficiamento que conseguisse produzir caulins de alta alvura a partir de minérios de baixa alvura, sendo economicamente viável, a fim de atender às demandas crescentes do mercado papeleiro por este tipo de produto. O desenvolvimento foi dividido em duas etapas, sendo a primeira realizada entre 2003 e 2004, onde se testou um processo especial de beneficiamento chamado agregação seletiva, que objetivou a retirada dos contaminantes titaníferos dos caulins estudados. Como o resultado desta etapa não foi satisfatório, houve então uma segunda etapa deste trabalho em 2007, onde o mecanismo da agregação seletiva foi modificado, atingindo desta vez os objetivos propostos.Todo o desenvolvimento foi realizado no laboratório e planta piloto do setor de caulim, no CDM (Centro de Desenvolvimento Mineral) da Vale, em Santa Luzia, Minas Gerais. For the last years, the papermaking market has been demanding for more and more noble fillers. In the case of coated papers, the demand for high brightness kaolin has increased, which is becoming a growing challenge to their producers, especially those of fine kaolins. It is known that the finer is the kaolin, the finer are the contaminants, and due to this fact the respective beneficiation process becomes extremely complicated and high cost.As the conventional beneficiation processes usually require high brightness ores to obtain high brightness products, and the availability of high brightness ores is usually very small, the marketing of these high brightness products has been continuously shownlower profitability, even becoming not viable in some cases.The purpose of this study was to develop a beneficiation process that allows toproduce high brightness products from low brightness ores, being economically viable, in order to meet mainly the papermakers growing demands. The development was divided into two stages, where in the first one a special beneficiation process called selective aggregation was tested, which aimed the removal of titanium contaminants by dispersantdosage excess and high rotation centrifugation. As the result of this stage was not satisfactory, there was a second one, where the mechanism of selective aggregation has been changed, using this time as reagents sodium hydroxamate and a modified magnethite. Measuring the kaolin optical properties and the respective residual level of TiO2 , it was possible to conclude that the modified process developed in the second stage reached the proposed goals.The whole development was conducted in the kaolin laboratory and pilot plant in the CDM (Center for Mineral Development) of Vale, in Santa Luzia, Minas Gerais.

Published
2009

47. Caracterização de amostras de bauxita visando a aplicação de métodos de concentração gravítica

Author

Diego de Souza Arenare, Armando Correa de Araujo, Roberto Galery, Paulo Roberto de Magalhaes Viana, and Sonia Denise Ferreira Rocha

Subjects
caracterização tecnológia, Bauxita, caracterização gravítico, Engenharia metalúrgica
Abstract

A rocha bauxita (bauxito) compõe-se de uma mistura complexa de minerais de alumínio, sendo os mais importantes a gibbsita -Al(OH)3, o diásporo -AlO(OH) e a boehmita -AlO(OH) e de outros óxidos e silicatos. Esses minerais são conhecidos como oxi-hidróxidos de alumínio e suas proporções na rocha variam muito entre os depósitos, bem como o tipo e a quantidade de impurezas (óxidos de ferro hematita e goethita; aluminossilicatos caulinita; quartzo, etc.). O processamento mineral dos minérios de bauxita é feito de maneira bastante simplificada, consistindo em britagem e posterior lavagem para a retirada da lama que contém grande parte dos minerais contaminantes, especialmente os aluminossilicatos (sílica reativa). A obtenção da alumina com alto grau de pureza é efetuada pelo processo Bayer, que consiste na digestão dos minerais de alumínio, especialmente a gibbsita, tornando-os solúveis e os demais contaminantes insolúveis. Atualmente as empresas mineradoras de vários setores (ferrosos, metais básicos, minerais industriais) têm voltado sua atenção para a diminuição das reservas minerais de alto teor, e para a necessidade de se aproveitar minérios até o momento considerado como marginais. Como tal, as empresas que produzem alumínio também têm buscado o aproveitamento de partes de seus depósitos até então considerados estéreis. Amostras de três diferentes níveis de um depósito de bauxita (bauxita nodular, laterita e bauxita maciça in natura), provenientes da mina de Juruti da Alcoa (PA), foram caracterizadas com foco em se aplicar separação gravítica no processo de concentração. Os resultados mostraram que existe certa correlação entre a presença de sílica e ferro nas tipologias bauxita nodular e laterita. Isso é interessante para que ocorra redução no teor de sílica reativa nas amostras mediante retirada da fração rica em ferro. Entretanto, o critério de concentração gravítica das frações estudadas se mostrou bem próximos ao limite de aplicação dos métodos gravíticos para as três tipologias, indicando a dificuldade de separação entre as fases. Testes realizados em jigue não apresentaram resultados satisfatórios, enquanto testes em espiral concentradora mostraram ganhos no teor de alumina e na relação alumina/sílica para a bauxita nodular e a laterita. Bauxite Rock is a impure mixture of aluminum minerals, being gibbsite - -Al(OH)3, diaspore - -AlO(OH) and bohemite - -AlO(OH) the most importants. These minerals are aluminum oxi-hydroxes and their proportions in the rock are very variable, just as the kind and quantity of impurities (iron oxides hematite and goethite; aluminossilicates kaolinite; quartz, etc. Bauxite dressing is done by a much simple way, consisting of crushing and washing to withdraw the mud, which contains most part of aluminossilicates (reactive silica). High grade alumina is obtained by the Bayer process, which consists in the digestion of aluminum minerals, especially gibbsite. The latter becomes soluble while the other contaminants are insoluble at very alkaline pH conditions prevalent in the Bayer process reactors. Currently, mining companies of various sectors (iron, basic metals, industrial minerals) has turned their attention to the decrease of quality of mineral reserves, and the necessity of exploring low grade reserves, taken as marginal deposits until the moment. Aluminum producers are, in the same way, looking for process routes which could allow the profit of beds of bauxite deposits considered inappropriate for Bayer process until now. Samples of three different levels of a bauxite deposit (nodular bauxite, laterite and Massive bauxite in natura) owned by Alcoa (Juruti-PA), were characterized aiming application of gravity concentration. Results showed a correlation in particles between presence of silicon and iron in nodular bauxite and laterite samples. This is relevant once silicon content could reduce through removing iron rich fraction. However, gravity concentration criteria showed values close to application limit, indicating difficulty of separation. Jig tests did not showed good results, while spiral tests showed improvements in alumina grade and in relation alumina/silicon for nodular bauxite and laterite.

Published
2009

48. Flotação de fosfatos presentes em minérios de ferro brasileiros

Author

Aline Pereira Leite, Armando Correa de Araujo, Antonio Eduardo Clark Peres, Paulo Roberto de Magalhaes Viana, and Eunirio Zanetti Fernandes

Subjects
Fosfato, Flotação, Minério de ferro, Engenharia de minas, Engenharia metalúrgica
Abstract

Os depósitos de minério de ferro têm apresentado cada vez mais composições mineralógicas complexas, uma vez que os minérios mais ricos estão se esgotando. Os maiores problemas estão relacionados aos teores em ferro cada vez mais baixos e teores de ganga cada vez maiores. Os fosfatos que ocorrem em depósitos sedimentares podem ser primários, na forma de apatita, e secundários, redepositados ou formando soluções sólidas com minerais oxidados de ferro. A redução do teor em fósforo dos minérios de ferro de depósitos não intemperizados, contendo magnetita ou hematita primária, pode ser efetuada por flotação catiônica ou aniônica e também por separação magnética. Nos depósitos de minério de ferro intemperizados, o fósforo ocorre altamente disseminado na forma de minerais secundários. A redução do teor de fósforo é mais complicada nesses casos e não há muita referência na literatura de estudos voltados para esses minérios. Estudos de caracterização química, mineralógica e morfológica de uma amostra do Quadrilátero Ferrífero para identificação de minerais de fósforo foram realizados. O minério é de alto teor, contendo hematita como principal mineral-minério e senegalita como principal mineral de ganga. A wavellita também foi identificada. A flotabilidade da wavellita foi avaliada na presença de diversos ácidos graxos, e o Hidrocol apresentou-se como melhor coletor ao longo da faixa de pH alcalino. Testes com amina mostraram uma flotabilidade superior a 90% entre pH 9,5 e pH 10,6 para a wavellita. O ponto isoelétrico da wavellita está em torno de pH 4,2. Os melhores testes de flotação foram realizados com amido como depressor de óxidos de ferro e amina EDA como coletor de fosfatos. O melhor resultado foi obtido com a flotação em dois estágios, sendo o primeiro com a adição de 500g/t de amido e 150g/t de amina em pH 10,5 e o segundo estágio com a adição de 350g/t de silicato de sódio e 200g/t de tall oil em pH 10,7. O concentrado obtido neste teste apresentou um concentrado com 0,168% de fósforo a partir de uma alimentação contendo 0,56%P. Iron ore deposits are becoming increasingly complex in their mineralogical composition, as the richest ores are used up. The biggest problems are related to low levels of iron and levels of gangue are increasing. The phosphates that occur in sedimentary deposits can be primary, in the form of apatite, and secondary, forming solid solutions with oxidized iron minerals. Reducing the phosphorus content in ironores of deposits containing primary magnetite or hematite can be achieved by anionic or cationic flotation. In weathered iron ore deposits, phosphorus is highly disseminated in the form of secondary minerals. Reducing the phosphorus content is more complicated in these cases and there is no reference in the literature of studies towards theseminerals. Studies aiming at the chemical, mineralogical and morphological characterization of an iron ore sample from the Iron Ore Quadrangle of Minas Gerais,Brazil, were performed. The ore is rich, with hematite as the main ore-mineral and senegalite (an aluminium phosphate) as the main gangue mineral. Wavellite, yet anotheraluminium phosphate was also identified. The floatability of wavellite was evaluated in the presence of various fatty acids and Hidrocol was found as the best collector over the alkaline pH range. Tests with amine showed a greater than 90% recovery between pH 9.5 and pH 10.6 for wavellite. The wavellite isoelectric point was encountered at pH 4.2. The best batch flotation tests were those with starch as a depressant of iron oxides and amine EDA as collector for the phosphate phases. The best result was obtained by flotation in two stages, one with the addition of 500g/t of starch and 150g/t of amine at pH 10.5 and the second stage with the addition of 350g/t of sodium silicate and 200g/t of tall oil at pH 10.7. The product obtained in this test showed a concentrate with0.168% phosphorus from a feed grade of 0,56%P

Published
2009

49. Estudos de flotação de caulinita

Author

Otavia Martins Silva Rodrigues, Armando Correa de Araujo, Antonio Eduardo Clark Peres, George Eduardo Sales Valadao, and Paulo Roberto de Magalhaes Viana

Subjects
Tecnologia mineral, Flotação, Engenharia de minas, Potencial zeta, Caulinita, Engenharia metalúrgica
Abstract

A caulinita (principal mineral constituinte dos minérios de caulim) está cada vez mais presente como mineral de ganga nos minérios bauxíticos e nos minérios de ferro. Métodos para separá-la serão cada vez mais necessários, uma vez que sua presença é altamente indesejável nos processos subseqüentes aos quais esses minérios são submetidos.A caulinita origina, nas operações de fragmentação do minério, partículas de tamanho muito pequeno. Devido à aplicabilidade em ampla faixa granulométrica, a flotação se apresenta como um possível método para a separação da caulinita em minérios bauxíticos e de ferro. Este trabalho objetivou o estudo fundamental das variáveis envolvidas (tipo e concentração de reagentes, pH) na flotação da caulinita a partir deensaios de microflotação, em tubo de Hallimond, e medidas de potencial zeta. Os testes foram realizados com amostra de caulinita de elevada pureza (96%). Seis coletores foram testados: 2-amino-1-hexanol (AH), Duomeen T (DT), cloreto de cetilpiridina (CCP), brometo de cetiltrimetilamônio (CTAB), dodecilamina (DDA) e Flotigam EDA (EDA). Quatro deles se apresentaram como bons coletores, na concentração de 1x10-4mol/L: CCP, CTAB, DDA e EDA. O coletor DT apresentou eficiência na coleta de caulinita apenas para concentrações superiores a 1x10-3mol/L. O AH não possui ação coletora para caulinita, provavelmente, devido ao fato de apresentar uma curta cadeia carbônica.O ponto isoelétrico encontrado para a caulinita foi em pH igual a 4,6. Acredita-se que a adsorção dos reagentes sobre o mineral ocorra por mecanismos eletrostático e de ligação de hidrogênio. The increasing presence of kaolinite (main mineral which composes the kaolin ores) in bauxites and iron ores is a matter of concern. The search for methods to separate kaolinite, highly undesirable in the subsequent processes, from iron minerals is required. Very fine particles are originated from kaolinite in ore fragmentation operations. Flotation is presented as a possible kaolinite separation method in bauxites and ironores due to its applicability in a wide size range. Flotation is a separation process applied to solid particles which explores differences in surface characteristics amongst various present species. The objective of this work was the fundamental study of the variables involved (type and concentration of reagents, pH) in kaolinite flotation through microflotation tests in a Hallimond tube and zeta potential determinations. The tests were performed with a pure sample of kaolinite (96%). Six collectors weretested: 2-amino-1-hexanol (AH), Duomeen T (DT), cetylpiridinium chloride (CCP), cetyltrimethylammonium bromide (CTAB), dodecylamine (DDA), and Flotigam EDA (EDA). Four of them performed well as collectors, in the concentration of 1x10-4mol/L: CCP, CTAB, DDA and EDA. Collector DT presented efficiency in the recovery of kaolinite only for concentrations higher than 1x10-3mol/L. AH did not present efficiency in the flotation of kaolinite, probably, due to its short hydrocarbon chain. The isoelectric point determined for the kaolinite was at pH = 4.6. Likely the mechanism of adsorption of the reagents onto the mineral surface is through electrostatic and hydrogen bonds.

Published
2009

50. Caracterização de minérios da Mina de Brucutu, Vale, focada na previsibilidade das operações de concentração mineral

Author

Leonardo de Almeida Queiroz, Paulo Roberto Gomes Brandao, Armando Correa de Araujo, Roberto Galery, Jose Aurelio Medeiros da Luz, Luis Marcelo Marques Tavares, and Eliomar Evaristo Ferreira

Subjects
Tecnologia mineral, Materias e de Minas, Minérios de ferro Métodos de simulação, Determinação mineralógica, Engenharia Metalúrgica, Concentradores (Beneficiamento de minério)
Abstract

Apresenta-se uma abordagem de caracterização aplicada ao depósito de minério de ferro de Brucutu, da VALE, tendo como objetivos a identificação e a definição das principais características necessárias, a fim de aprimorar a previsibilidade das operações de concentração na usina de beneficiamento mineral. Os aspectos teóricos relacionados às operações unitárias de concentração por jigagem, concentração magnética, concentração por flotação, técnicas de caracterização mineral e revisão de modelos matemáticos aplicados à simulação de operações de concentração são apresentados na revisão da literatura. A pesquisa empregou análise mineralógica, testes de processo em escala de bancada e em planta piloto de beneficiamento mineral. A simulação das operações unitárias de concentração por jigagem, magnética e flotação de minério de ferro incorporou as informações de composição química, granulométrica e associações de partículas minerais. Uma abordagem detalhada foi empregada quanto à definição dos critérios para aceitação de resultados de análise mineralógica em minério de ferro, a partir da investigação de resultados de análises em replicata. Apresenta como conclusão principal a validação do uso da combinação de análises química, granulométrica, de associações de partículas minerais e de modelos matemáticos de simulação na previsão de resultados nos processos de concentração de minério de ferro. Outra contribuição é a apresentação de um procedimento simplificado para a estimativa de partições em massa, resultados de composição química em fluxos internos de circuitos de flotação convencional e do tempo de residência correspondente, empregando o conhecimento da cinética de flotação. A characterization study applied to the Brucutu iron ore deposit, VALE, was developed, which aimed to identify and determine the main characteristics in order to increase the concentration units predictability in the mineral treatment plant. Fundamental aspects related to the mineralogical analyses and mineral process testwork in bench and pilot plant scales, such as jigging, drum magnetic separation, wet high intensity magnetic separation, flotation in mechanical or conventional cells are presented in the bibliography review. Mineralogical analysis and mineral processing testwork in bench and pilot plant scales has been applied throughout. The modeling of iron ore concentration unit operations by jigging, magnetic separation and flotation took into account information about chemical composition, size distribution and particles mineral associations. Detailed investigation was applied considering the establishment of a procedure to validate the iron ore mineralogical analyses from several repeated determinations. Validation of process simulation to iron ore, applying the combination of chemical, mineralogical and size analyses, is presented. The main result obtained was to improve the prior information to reach better performance in jigging, magnetic concentration and flotation processes. Another contribution was the establishment of a simplified procedure to estimate the flowrate and the chemical composition to internal flows in conventional flotation circuits and the residence time necessary to reach these results applying flotation kinetics knowledge.

Published
2008

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