78 results on '"Giani D"'
Search Results
2. Trophic niche influences ingestion of micro- and mesoplastics in pelagic and demersal fish from the Western Mediterranean Sea
- Author
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Giani D., Andolina C., Baini M., Panti C., Sciandra M., Vizzini S., Fossi, M. C., and Giani, D., Andolina, C., Baini, M., Panti, C., Sciandra, M., Vizzini, S., & Fossi, M.C.
- Subjects
Fish specie ,Isotopic niche ,Feeding habit ,Microplastic ,Stable isotopes ,Mesoplastic - Abstract
Plastic pollution has been extensively documented in the marine food web, but targeted studies focusing on the relationship between microplastic ingestion and fish trophic niches are still limited. In this study we investigated the frequency of occurrence and the abundance of micro- and mesoplastics (MMPs) in eight fish species with different feeding habits from the western Mediterranean Sea. Stable isotope analysis (δ13C and δ15N) was used to describe the trophic niche and its metrics for each species. A total of 139 plastic items were found in 98 out of the 396 fish analysed (25%). The bogue revealed the highest occurrence with 37% of individuals with MMPs in their gastrointestinal tract, followed by the European sardine (35%). We highlighted how some of the assessed trophic niche metrics seem to influence MMPs occurrence. Fish species with a wider isotopic niche and higher trophic diversity were more probable to ingest plastic particles in pelagic, benthopelagic and demersal habitats. Additionally, fish trophic habits, habitat and body condition influenced the abundance of ingested MMPs. A higher number of MMPs per individual was found in zooplanktivorous than in benthivore and piscivorous species. Similarly, our results show a higher plastic particles ingestion per individual in benthopelagic and pelagic species than in demersal species, which also resulted in lower body condition. Altogether, these results suggest that feeding habits and trophic niche descriptors can play a significant role in the ingestion of plastic particles in fish species.
- Published
- 2023
3. Trophic niche features influence microplastic ingestion in Mediterranean fish species
- Author
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ANDOLINA C., GIANI D., BAINI M., PANTI C., SCIANDRA M., VIZZINI S., FOSSI M. C., ANDOLINA C., GIANI D., BAINI M., PANTI C., SCIANDRA M., VIZZINI S., and FOSSI M.C.
- Subjects
microplastic ingestion ,Mediterranean fish specie ,Trophic niche feature - Abstract
Widespread microplastic (MP) contamination in the marine environment has raised global concern in the last decade. Scientific evidence of the adverse effects of MP on organisms is growing fast and there is urgent need to fulfil the knowledge gaps about the trophic drivers that lead to such contamination processes and resulting impacts. Fish are considered good bioindicators of MP contamination due to their easy availability, high ecological and commercial value, however our understanding of how trophic niche influences MP ingestion is limited. Here, we investigated the occurrence and abundance of MP in the gastrointestinal tract of 8 commercial fish species (Boops boops, Engraulis encrasicolus, Merluccius merluccius, Micromesistius poutassou, Mullus barbatus, Sardina pilchardus, Scomber scombrus and Trachurus trachurus) from North-western Mediterranean Sea, with the aim to assess the relationship with fish trophic niche features (trophic position, isotopic niche width and diversity), trophic habit (zooplanktivorous, benthivorous and piscivorous), habitat (demersal, pelagic and benthopelagic) and body condition. 25% of the 396 fish analysed presented MP particles. Trophic niche features, evaluated through stable carbon and nitrogen isotope analysis, revealed to influence the occurrence of MP ingested, while fish trophic habit and habitat seemed to influence the abundance of ingested MP. Fish species displaying wider isotopic niche and higher trophic diversity resulted to be more likely to incur in MP ingestion in each habitat. Also, MPs were more abundant in zooplanktivores, benthopelagic and pelagic species than in demersal species and in individuals with lower body condition. These results suggest that the more the diet of a species is differentiated, the higher is the risk of plastic ingestion, which is also linked to the individual body condition. Overall, this study highlights the importance of considering trophic niche features as a promising approach to study the drivers of MP contamination.
- Published
- 2022
4. SAPTE: A multimedia information system to support the discourse analysis and information retrieval of television programs
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Pereira, Moisés H. R., de Souza, Celso L., Pádua, Flávio L. C., Silva, Giani D., de Assis, Guilherme T., and Pereira, Adriano C. M.
- Published
- 2015
- Full Text
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5. Molecular Characterisation of Kynurenine Pathway Enzymes : 3-Hydroxyanthranilic-Acid Dioxygenase and Kynurenine Aminotransferase
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Cesura, A. M., Alberati-Giani, D., Buchli, R., Broger, C., Köhler, C., Vilbois, F., Lahm, H.-W., Heitz, M.-P., Malherbe, P., Filippini, Graziella Allegri, editor, Costa, Carlo V. L., editor, and Bertazzo, Antonella, editor
- Published
- 1996
- Full Text
- View/download PDF
6. Regulation of the Kynurenine Pathway by IFN-γ in Murine Cloned Macrophages and Microglial Cells
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Alberati-Giani, D., Ricciardi-Castagnoli, P., Köhler, C., Cesura, A. M., Filippini, Graziella Allegri, editor, Costa, Carlo V. L., editor, and Bertazzo, Antonella, editor
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- 1996
- Full Text
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7. A Survey of Distance Education Challenges and Technologies.
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Timothy K. Shih, Giani D. Antoni, Timothy Arndt, Asirvatham Asirvatham, Ching-Tao Chang, Yam San Chee, Chyi-Ren Dow, Jason C. Hung, Qun Jin, Insung Jung, Hong V. Leong, Sheng-Tun Li, Fuhua Lin, Jonathan C. L. Liu, Nicoletta Sala, and Ying-Hong Wang
- Published
- 2003
- Full Text
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8. Expression of the kynurenine enzymes in macrophages and microglial cells: regulation by immune modulators
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Alberati-Giani, D. and Cesura, A. M.
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- 1998
- Full Text
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9. Relevance of current PCB concentrations in edible fish species from the Mediterranean Sea
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European Commission, Bartalini, Alice, Muñoz-Arnanz, Juan, Baini, M., Panti, C., Galli, M., Giani, D., Fossi, M. Cristina, Jiménez, Begoña, European Commission, Bartalini, Alice, Muñoz-Arnanz, Juan, Baini, M., Panti, C., Galli, M., Giani, D., Fossi, M. Cristina, and Jiménez, Begoña
- Abstract
Legal restrictions and bans have led to a steady decrease in PCB environmental concentrations. Yet, in recent years PCBs have been found at very high levels in the Mediterranean Sea, for instance, in some apex predators. This work aimed to investigate current PCB (eighteen congeners: #28,52,77,81,101,105,114,118,123,126,138,153,156,157,167,169,180,189) concentrations in the Mediterranean Sea and their relevance today, focusing on their occurrence in edible fish species typically consumed in the Mediterranean diet. In spring 2017, a total of 48 fish samples from the Northern Thyrrenian Sea were collected: 16 specimens of sardine (Sardina pilchardus), 16 of anchovy (Engraulis encrasicolus) and 16 of bogue (Boops boops). PCBs were quantified in the muscle of the animals by means of GC-QqQ-MS. They were found in all samples at the greatest concentrations (ng/g w.w.) in sardine (4.15–17.9, range), and very similar values between anchovy (1.01–7.08) and bogue (1.46–7.22). WHO-TEQ PCB values followed the same order, i.e. sardine (0.410–1.24, range in pg/g w.w.) > anchovy (0.0778–0.396) ~ bogue (0.0726–0.268). These concentrations lied below the European limits of 75 ng/g (w.w.) for the six indicator PCBs and 6.5 pg/g WHO-TEQ for dioxins and dioxin-like PCBs in muscle meat of fish. Additionally, estimated weekly intakes (EWI, in pg WHO-TEQ/Kg/week) for sardine (1.2), anchovy (0.29) and bogue (0.35) scored below the safe value proposed by EFSA of 2 pg WHO-TEQ/Kg/week. When comparing with data reported for the same species in previous Mediterranean studies, values found here were lower than those surveyed in the late 90s and early 2000s; however, they were often not notably different from concentrations reported in last years. This builds up on the concept of a current slow decrease of PCBs in the Mediterranean Sea, likely linked to new inputs and/or remobilization of burdens, and reinforces the need of continous monitoring of these legacy contaminants still ubiquitous today.
- Published
- 2020
10. Tecnología del hormigón avanzada
- Author
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Solas A., Andrés, Giani D., Ricardo, Solas A., Andrés, and Giani D., Ricardo
- Published
- 2010
11. Mulheres-editoras-independentes e os gestos decoloniais no discurso e na edição
- Author
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Letícia Santana Gomes and Giani David Silva
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Análise do Discurso contra-hegemônica ,Mulheres-editoras-independentes ,Edição de si ,Philology. Linguistics ,P1-1091 - Abstract
Neste artigo, adotamos uma perspectiva discursiva decolonial na análise de i) trechos das entrevistas semiestruturadas com três mulheres-editoras-independentes: Constanza Brunet (Argentina), Isabelle Pivert (França) e Ivana Jinkings (Brasil); ii) três catálogos editoriais da Marea Editorial (Argentina), Éditions du Sextant (França) e Boitempo Editorial (Brasil). A partir desses corpora, que não se enquadram em uma Análise do Discurso tradicional, propomos suscitar questionamentos para uma Análise do Discurso contra-hegemônica e descentralizada. Para isso, trazemos a nossa postura em adotar as narrativas de vida como metodologia decolonial, já que, atualmente, uma abordagem que relaciona Análise do Discurso, a Interseccionalidade e a Decolonialidade podem ser ricas ferramentas para contribuir às teorias do discurso, devido ao seu dinamismo teórico, se descentralizando de hegemonias conceituais. Propomos o conceito de “edição de si”, ancorados em uma perspectiva discursiva e editorial decolonial, que acompanha uma incompletude das mulheres-editoras-independentes e de suas casas editoriais.
- Published
- 2023
- Full Text
- View/download PDF
12. Isolation and evaluation of quinoa (Chenopodium quinoa Willd.) protein fractions. A nutritional and bio-functional approach to the globulin fraction
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Olga Luisa Tavano, Maria Julia de Miguel Amistá, Giani Del Ciello, Marilia Caroline Martini Rodrigues, Amanda Marcela Bono Nishida, Letícia Alves Valadares, Bruno Moreira Siqueira, Roseli Aparecida da Silva Gomes, Marco Túlio Parolini, and Sinézio Inácio da Silva Junior
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Globulins ,Protein solubility ,Bioactive peptides ,Antioxidant peptides ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
This study evaluated the solubility profiles of quinoa grain proteins and applied a complete process for the isolation of its main protein fractions, namely: albumins, globulins, prolamins and glutelins, which corresponded to 26.96%, 41.3%, 1.7% and 23.16% of the total protein content, respectively. When these fractions were digested with pepsin followed by pancreatin, the degrees of hydrolysis achieved varied between 26.62% (for unheated globulin fraction) and 38.97% (for unheated glutelin), with casein reached 33.73% hydrolysis. After heating, the globulin hydrolysis degree increased to 34.7%, not significantly differing from casein. These results reflect its good susceptibility to hydrolysis by digestive enzymes, and this observation is reinforced with assays with pepsin, trypsin and chymotrypsin tested separately. Globulins, the largest protein fraction, showed promising results in additional assays regarding the amino acid profile, with limitation only for lysine in relation to the FAO standard, and the potential for releasing bioactive peptides after digestion. Although pepsin-digested globulin inhibited only 5% of ACE activity under the conditions tested, after 24h with the addition of pancreatin, the inhibition was 100%. Antioxidant activity (DPPH assay) also indicated very similar results, when hydrolysis with pepsin was inefficient in releasing antioxidant peptides, while hydrolysis by pancreatin led to 35 times greater results.
- Published
- 2022
- Full Text
- View/download PDF
13. Avaliação Do Nível De Interesse Na Recuperação De Vídeos Utilizando-se Lógica Fuzzy
- Author
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Pereira, Moisés H. R., primary, Piva, Rafael C., additional, Pádua, Flávio L. C., additional, Silva, Giani D., additional, and Almeida, Paulo E. M., additional
- Published
- 2016
- Full Text
- View/download PDF
14. O2 and H2S coexistence in stromatolites: A model for the origin of mineralogical lamination in stromatolites and banded iron formations
- Author
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Krumbein, W. E., Buchholz, H., Franke, P., Giani, D., Giele, C., and Wonneberger, K.
- Published
- 1979
- Full Text
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15. Photoacoustic in-vivo spectra of recent stromatolites
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Schubert, W., Giani, D., Rongen, P., Krumbein, W. E., and Schmidt, W.
- Published
- 1980
- Full Text
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16. SAPTE: A multimedia information system to support the discourse analysis and information retrieval of television programs
- Author
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Pereira, Moisés H. R., primary, de Souza, Celso L., additional, Pádua, Flávio L. C., additional, Silva, Giani D., additional, de Assis, Guilherme T., additional, and Pereira, Adriano C. M., additional
- Published
- 2014
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17. A unified approach to content-based indexing and retrieval of digital videos from television archives
- Author
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Souza, Celso L., primary, Pádua, Flávio Luis Cardeal, additional, Nunes, Cristiano F. G., additional, Assis, Guilherme T., additional, and Silva, Giani D., additional
- Published
- 2014
- Full Text
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18. Multimedia Information System to Support the Discourse Analysis of Video Recordings of Television Programs.
- Author
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Pereira, Moisés H. R., Pádua, Flávio L. C., Silva, Giani D., Assis, Guilherme T., and Zenha, Taiana M.
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MULTIMEDIA systems ,VIDEOS ,CONTENT rating of television programs ,COMPUTERS in discourse analysis ,METADATA ,SIGNAL processing - Abstract
This paper describes the development of a multimedia information system to support the discourse analysis of video recordings of television programs. Although the TV system is one of the most fascinating media phenomena ever created by men, there is still a lack of information systems that allow an effective retrieval of TV information relevant to the discoursive analysis and evaluation of such content. Given this context, in an attempt to provide Brazilian TV researchers with computational tools to assist their research, as well as to contribute to the discussion towards turning viable the access to the TV collection developed in this country, this work proposes the development of a multimedia information system, with a partnership with the Brazilian open TV channel Rede Minas. The mentioned system is based on the Matterhorn framework, indexing and retrieval techniques of audiovisual information and a tool collection that allows the automatic evaluation of essential parameters on the discourse analysis of TV video. The architecture developed for the system involves the possibility of information retrieval based on content independent metadata, as well as content dependent metadata, which are determined through discourse analysis techniques and image and sound signal processing. [ABSTRACT FROM AUTHOR]
- Published
- 2012
19. A multimedia information system to support the discourse analysis of video recordings of television programs.
- Author
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Pereira, Moises H. R., Padua, Flavio L. C., Silva, Giani D., Assis, Guilherme T., and Zenha, Taiana M.
- Abstract
This paper describes the development of a multimedia information system to support the discourse analysis of video recordings of television programs. Although the TV system is one of the most fascinating media phenomena ever created by men, there is still a lack of information systems that allow an effective retrieval of TV information relevant to the discoursive analysis and evaluation of such content. Given this context, in an attempt to provide Brazilian TV researchers with computational tools to assist their research, as well as to contribute to the discussion towards turning viable the access to the TV collection developed in this country, this work proposes the development of a multimedia information system, with a partnership with the Brazilian open TV channel Rede Minas. The mentioned system is based on the Matterhorn framework, indexing and retrieval techniques of audiovisual information and a tool collection that allows the automatic evaluation of essential parameters on the discourse analysis of TV video. The architecture developed for the system involves the possibility of information retrieval based on content independent metadata, as well as content dependent metadata, which are determined through discourse analysis techniques and image and sound signal processing. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
20. A Survey of Distance Education Challenges and Technologies
- Author
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Shih, Timothy K., primary, Antoni, Giani D., additional, Arndt, Timothy, additional, Asirvatham, Asirvatham, additional, Chang, Ching-Tao, additional, Chee, Yam S., additional, Dow, Chyi-Ren, additional, Hung, Jason C., additional, Jin, Qun, additional, Jung, Insung, additional, Leong, Hong V., additional, Li, Sheng-Tun, additional, Lin, Fuhua, additional, Liu, Jonathan, additional, Sala, Nicoletta, additional, and Wang, Ying-Hong, additional
- Published
- 2003
- Full Text
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21. OFQ knock-out mice: Behavioral phenotype seems to indicate homeostatic compensation of OFQ functional deficits
- Author
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Jenck, F., primary, Borroni, E., additional, Cesura, A.M., additional, Alberati-Giani, D., additional, Moreau, J.L., additional, Pauly-Evers, M., additional, Bluethmann, H., additional, and Koester, A., additional
- Published
- 1998
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22. Regulation of enzymes of the kynurenine pathway by interferon-gamma in murine macrophages and microglia
- Author
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Cesura, A.M., primary, Alberati-Giani, D., additional, Köhler, C., additional, and Ricciardi-Castagnoli, P., additional
- Published
- 1995
- Full Text
- View/download PDF
23. Semiodiscursive analysis of TV newscasts based on data mining and image processing
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Felipe Leandro Andrade da Conceição, Flávio Luis Cardeal Pádua, Adriano César Machado Pereira, Guilherme Tavares de Assis, Giani David Silva, and Antônio Augusto Braighi Andrade
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Journalism ,Computing ,Discursive Metadata ,Discourse Analysis ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Science (General) ,Q1-390 - Abstract
This work addresses the development of a novel computer-aided methodology for discourse analysis of TV newscasts. A TV newscast constitutes a particular type of discourse and has become a central part of the modern-day lives of millions of people. It is important to understand how this media content works and how it affects human life. To support the study of TV newscasts under the discourse analysis perspective, this work proposes a newscast structure to recover its main units and extract relevant data, named here as newscast discursive metadata (NDM). The NDM describes aspects, such as screen time and field size of newscasts’ participants and themes addressed. Data mining and image analysis methods are used to extract and analyze the NDM of a dataset containing 41 editions of two Brazilian newscasts. The experimental results are promising, demonstrating the effectiveness of the proposed methodology.
- Published
- 2017
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24. Os conceitos de verdade, midiatização e acontecimento para análise de narrativas telejornalísticas
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Rafael Magalhães Angrisano and Giani David Silva
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Romanic languages ,PC1-5498 ,Philology. Linguistics ,P1-1091 - Abstract
A estética televisiva ainda é a principal referência de reprodução da realidade social. Mesmo com o avanço das novas mídias e da web, a televisão permanece forte para grande parte da população. A TV é a mídia de referência do nosso cotidiano. Sabendo disso, torna-se necessário refletir a construção dos modelos de realidade veiculados todos os dias pelos media. No presente artigo, propomos uma reflexão de alguns conceitos que consideramos fundamentais, como Verdade, Midiatização e Acontecimento. A revisão foi feita com base nas obras de Verón, Deleuze, Queré e outros autores consagrados de diferentes campos do conhecimento como a Filosofia, a Sociologia e a Semiótica. Trata-se de conceitos de sofisticação teórica, em que percebemos mais diálogos do que discordâncias, três olhares que podem servir como operadores de análise para a reflexão das mais variadas narrativas televisuais de informação. Ao fim, propomos cinco chaves de leitura, com base nas reflexões feitas, a saber, a observação dos meios com que as narrativas almejam obter um caráter de verdade absoluta, os modos como o discurso tenta concordar com o real por meio de juízos expressos por identificações e qualificações dos seres, os aspectos indiciais das narrativas, a relação entre a dimensão verbal e a dimensão visual e a perda e o ganho de significado na formatação do acontecimento em relato.Palavras-chave: verdade, acontecimento, midiatização.
- Published
- 2016
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25. Transplante renal: análise comportamental a partir da Técnica dos Incidentes Críticos
- Author
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Bianca Pozza dos Santos, Eda Schwartz, Margrid Beuter, Maria Elena Echevarría-Guanilo, Aline Machado-Feijó, and Giani da Cunha-Duarte
- Subjects
Nursing ,RT1-120 ,Social Sciences - Abstract
Objetivo:identificar las conductas de las personas con el trasplante renal utilizando la Técnica de los Incidentes Críticos.Método:estudio con abordaje cualitativo de tipo descriptivo empleando la Técnica de los Incidentes Críticos. Se recolectaron los datos por mediode entrevista semiestructurada y se relacionaron el perfil socioeconómico de los entrevistados y los incidentes críticos identificados.Participaron en el estudio 20 personas, diez hombres y diez mujeres.Resultados:los resultados señalaron que la ocurrencia de 141conductas, 108 positivas y 33 negativas, relacionadas al cuidado adoptado a la salud, las actividades cotidianas y la vida conel tras-plante renal.Conclusiones:la aplicación de la Técnica de los Incidentes Críticos permitió obtener datos acerca del modo como eltrasplante renal influye determinadas conductas, positiva y negativamente, en la vida de la persona.
- Published
- 2016
26. Multimodal Approach for Automatic Emotion Recognition Applied to the Tension Levels Study in TV Newscasts
- Author
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Moisés Henrique Ramos Pereira, Flávio Luis Cardeal Pádua, and Giani David Silva
- Subjects
TV Newscasts ,Tension Levels ,Emotion Recognition. Speech ,Facial Expressions ,Communication. Mass media ,P87-96 ,Journalism. The periodical press, etc. ,PN4699-5650 - Abstract
This article addresses a multimodal approach to automatic emotion recognition in participants of TV newscasts (presenters, reporters, commentators and others) able to assist the tension levels study in narratives of events in this television genre. The methodology applies state-of-the-art computational methods to process and analyze facial expressions, as well as speech signals. The proposed approach contributes to semiodiscoursive study of TV newscasts and their enunciative praxis, assisting, for example, the identification of the communication strategy of these programs. To evaluate the effectiveness of the proposed approach was applied it in a video related to a report displayed on a Brazilian TV newscast great popularity in the state of Minas Gerais. The experimental results are promising on the recognition of emotions on the facial expressions of tele journalists and are in accordance with the distribution of audiovisual indicators extracted over a TV newscast, demonstrating the potential of the approach to support the TV journalistic discourse analysis.This article addresses a multimodal approach to automatic emotion recognition in participants of TV newscasts (presenters, reporters, commentators and others) able to assist the tension levels study in narratives of events in this television genre. The methodology applies state-of-the-art computational methods to process and analyze facial expressions, as well as speech signals. The proposed approach contributes to semiodiscoursive study of TV newscasts and their enunciative praxis, assisting, for example, the identification of the communication strategy of these programs. To evaluate the effectiveness of the proposed approach was applied it in a video related to a report displayed on a Brazilian TV newscast great popularity in the state of Minas Gerais. The experimental results are promising on the recognition of emotions on the facial expressions of tele journalists and are in accordance with the distribution of audiovisual indicators extracted over a TV newscast, demonstrating the potential of the approach to support the TV journalistic discourse analysis.
- Published
- 2015
- Full Text
- View/download PDF
27. Abordagem Multimodal para Reconhecimento Automático de Emoções Aplicada ao Estudo de Níveis de Tensão em Telejornais
- Author
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Moisés Henrique Ramos Pereira, Flávio Lus Cardeal Pádua, and Giani David Silva
- Subjects
Communication. Mass media ,P87-96 ,Journalism. The periodical press, etc. ,PN4699-5650 - Abstract
Este artigo aborda o problema de análise de níveis de tensão em telejornais, por meio do reconhecimento automático multimodal de emoções em seus participantes. Para tanto, a metodologia proposta faz uso de métodos computacionais do estado da arte para processamento e análise de expressões faciais, bem como modulações sonoras de falas. Este trabalho tem como objetivo contribuir para o estudo semiodiscursivo de telejornais e suas práxis enunciativas, auxiliando, por exemplo, na identificação das estratégias de comunicação de tais programas. Nesse contexto, apresenta-se a caracterização do problema no âmbito dos estudos da chamada análise do discurso das mídias e os métodos computacionais para o reconhecimento multimodal de emoções a partir dos conteúdos audiovisuais dos vídeos associados aos programas. Além disso, descreve alguns dos principais trabalhos relacionados, a metodologia empregada, a descrição do corpus utilizado e alguns dos resultados experimentais alcançados.
- Published
- 2015
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28. Cloning and functional expression of human kynurenine 3-monooxygenase
- Author
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Alberati-Giani, D., Cesura, A. M., Broger, C., Warren, W. D., Roever, S., and Malherbe, P.
- Published
- 1997
- Full Text
- View/download PDF
29. O2 and H2S coexistence in stromatolites
- Author
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Krumbein, W. E., Buchholz, H., Franke, P., Giani, D., Giele, C., and Wonneberger, K.
- Abstract
The coexistence of O
2 and H2 S in recent microbial mats is demonstrated. Oxygen and H2 S are not only coexisting in considerable concentrations within recent stromatolites but high concentrations of the respective gases occur in alternating laminae. This “sandwich structure” is produced by alternating populations of oxygenic and anoxygenic photosynthetic bacteria and cyanobaeteria. The finding of such conditions may explain the alternation of oxidized and reduced iron minerals in Precambrian stromatolites and possibly also in the banded iron formations (BIFs).- Published
- 1979
- Full Text
- View/download PDF
30. Cloning and functional expression of a soluble form of kynurenine/alpha-aminoadipate aminotransferase from rat kidney.
- Author
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Buchli, R, Alberati-Giani, D, Malherbe, P, Köhler, C, Broger, C, and Cesura, A M
- Abstract
Several aminotransferases with kynurenine aminotransferase (KAT) activity are able to convert L-kynurenine into kynurenic acid, a putative endogenous modulator of glutamatergic neurotransmission. In the rat, one of the described KAT isoforms has been found to correspond to glutamine transaminase K. In addition, rat kidney alpha-aminoadipate aminotransferase (AadAT) also shows KAT activity. In this report, we describe the isolation of a cDNA clone encoding the soluble form of this aminotransferase isoenzyme from rat (KAT/AadAT). Degenerate oligonucleotides were designed from the amino acid sequences of rat kidney KAT/AadAT tryptic peptides for use as primers for reverse transcription-polymerase chain reaction of rat kidney RNA. The resulting polymerase chain reaction fragment was used to screen a rat kidney cDNA library and to isolate a cDNA clone encoding KAT/AadAT. Analysis of the combined DNA sequences indicated the presence of a single 1275-base pair open reading frame coding for a soluble protein of 425 amino acid residues. KAT/AadAT appears to be structurally homologous to aspartate aminotransferase in the pyridoxal 5'-phosphate binding domain. RNA blot analysis of rat tissues, including brain, revealed a single species of KAT/AadAT mRNA of approximately 2.1 kilobases. HEK-293 cells transfected with the KAT/AadAT cDNA exhibited both KAT and AadAT activities with enzymatic properties similar to those reported for the rat native protein.
- Published
- 1995
31. Funcionalidade familiar de idosos dependentes residentes em domicílios
- Author
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Gilson de Vasconcelos Torres, Luciana Araújo dos Reis, Luana Araújo dos Reis, Marcos Henrique Fernandes, Giani dos Santos Alves, Lucas Silveira Sampaio, and Claudio Henrique Meira Mascarenhas
- Subjects
Cuidado ,Idoso ,Família ,Funcionalidade ,Saúde ,Psychology ,BF1-990 - Abstract
Este estudo tem por objetivo analisar a funcionalidade familiar de idosos dependentes residentes no interior da região Nordeste do Brasil. Trata-se de uma pesquisa de caráter analítico com delineamento transversal. A amostra foi composta por 117 idosos dependentes, cadastrados nas Unidades de Saúde da Família. Os instrumentos utilizados foram o Apgar de família, Índice de Barthel e o levantamento de dados sócio-demográficos e de saúde. Verificou-se que a média de idade foi 80,79 (± 9,77) anos, com predomínio do sexo feminino (70,09%) e não alfabetizados (63,25%). Os problemas de saúde estiveram presentes em 93,16% dos idosos, sendo a patologia mais freqüente a Hipertensão Arterial (23,10%). Em relação à funcionalidade familiar constatou-se que 73,50% dos idosos relataram comprometimento. O conhecimento da funcionalidade familiar é importante para o desenvolvimento de mecanismos de assistência domiciliária adequada à saúde do idoso e de sua família.
- Published
- 2009
32. Transplante renal: análise comportamental a partir da Técnica dos Incidentes Críticos
- Author
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Bianca Pozza dos Santos, Eda Schwartz, Margrid Beuter, Maria Elena Echevarría-Guanilo, Aline Machado Feijó, and Giani da Cunha Duarte
- Subjects
Insuficiência renal crônica ,transplante de rim ,comportamento ,enfermagem ,Nursing ,RT1-120 ,Social Sciences - Abstract
Objetivo: identificar os comportamentos das pessoas com o transplante renal empregando a Técnica dos Incidentes Críticos. Método: estudo com abordagem qualitativa do tipo descritivo utilizando a Técnica dos Incidentes Críticos. Os dados foram coletados por meio de entrevista semiestruturada e foram relacionados o perfil socioeconômico dos entrevistados e os incidentes críticos identificados. Fizeram parte do estudo 20 pessoas, dez homens e dez mulheres. Resultados: os resultados apontaram a ocorrência de 141 comportamentos, 108 positivos e 33 negativos, relacionados ao cuidado adotado à saúde, às atividades cotidianas e à vida com o transplante renal. Conclusões: a aplicação da Técnica dos Incidentes Críticos permitiu obter dados sobre o modo como o transplante renal influencia determinados comportamentos, positiva e negativamente, na vida da pessoa. Doi: 10.5294/aqui.2016.16.1.9
- Published
- 2015
33. Os conceitos de verdade, midiatização e acontecimento para análise de narrativas telejornalísticas
- Author
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Rafael Magalhães Angrisano and Giani David Silva
- Subjects
Romanic languages ,PC1-5498 ,Philology. Linguistics ,P1-1091 - Abstract
A estética televisiva ainda é a principal referência de reprodução da realidade social. Mesmo com o avanço das novas mídias e da web, a televisão permanece forte para grande parte da população. A TV é a mídia de referência do nosso cotidiano. Sabendo disso, torna-se necessário refletir a construção dos modelos de realidade veiculados todos os dias pelos media. No presente artigo, propomos uma reflexão de alguns conceitos que consideramos fundamentais, como Verdade, Midiatização e Acontecimento. A revisão foi feita com base nas obras de Verón, Deleuze, Queré e outros autores consagrados de diferentes campos do conhecimento como a Filosofia, a Sociologia e a Semiótica. Trata-se de conceitos de sofisticação teórica, em que percebemos mais diálogos do que discordâncias, três olhares que podem servir como operadores de análise para a reflexão das mais variadas narrativas televisuais de informação. Ao fim, propomos cinco chaves de leitura, com base nas reflexões feitas, a saber, a observação dos meios com que as narrativas almejam obter um caráter de verdade absoluta, os modos como o discurso tenta concordar com o real por meio de juízos expressos por identificações e qualificações dos seres, os aspectos indiciais das narrativas, a relação entre a dimensão verbal e a dimensão visual e a perda e o ganho de significado na formatação do acontecimento em relato. Palavras-chave: verdade, acontecimento, midiatização.
- Published
- 2015
34. Heterogeneity and specificity of cancer associated mucins
- Author
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Bombardieri, E., Ettore Seregni, Giani, D., Bogni, A., Gion, M., and Buraggi, G. L.
35. As identidades culturais e os media: A representação do jovem na série 'Descolados'
- Author
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Rafael Magalhães Angrisano and Giani David Silva
- Subjects
televisão, identidade, juventude ,Language and Literature ,Communication. Mass media ,P87-96 - Abstract
O processo investigativo desse artigo tem a intenção de detectar pistas identitárias da juventude nas representações televisivas brasileiras. Para isso, esse trabalho analisou os conceitos de midiatização da sociedade e o de identidade nos tempos "pós-modernos". Com o auxílio da ferramenta analítica "modos de endereçamento", propomos a investigação do seriado"Descolados", na tentativa de identificar modelos de representação do jovem pelos media, especificamente a televisão, no momento atual.
- Published
- 2014
36. Mendes, Emília & Ida Lucia Machado (éds). 2010. As emoções no discurso (Campinas, São Paulo : Mercado de Letras)
- Author
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Giani David Silva
- Subjects
Style. Composition. Rhetoric ,P301-301.5 - Published
- 2011
- Full Text
- View/download PDF
37. Mycetoma by Nocardia asteroides: a 9 year folow-up Micetoma por Nocardia asteroides: acompanhamento de 9 anos
- Author
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Giani de Oliveira Saraça, Loan Towersey, Roderick James Hay, Alberto Thomaz Londero, Eunice de Castro Soares Martins, Alberto Torres Amora, Kátia Maria Pereira Nunes Reis, Ana Maria Nunes Mendonça, and Rogerio Ribeiro Estrella
- Subjects
Nocardia asteroides mycetoma ,Nocardia infections ,Actinomycetoma ,Arctic medicine. Tropical medicine ,RC955-962 ,Infectious and parasitic diseases ,RC109-216 - Abstract
An extensive and severe actinomycetoma by Nocardia asteroides, a rare etiologic agent of this infection in Brazil, observed during a 9 year follow-up is reported. Unsuitable social and financial conditions led to amputation as the only possible solution for this case, no signs of infection relapse having been observed in three years after his surgery.É relatado um caso de micetoma actinomicótico por Nocardia asteroides, raro agente desta infecção no Brasil, acompanhado ao longo de 9 anos de evolução, com lesões extensas e profundas. As precárias condições sócio-econômicas do paciente tornaram a amputação a única solução viável para este caso, não tendo sido observados sinais de reci-diva da infecção em três anos após a cirurgia.
- Published
- 1993
- Full Text
- View/download PDF
38. An endopeptidase in dormant lupin seeds
- Author
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Scarafoni, A., Giani, D., and Cerletti, P.
- Published
- 1992
- Full Text
- View/download PDF
39. Identification of a mitochondrial form of kynurenine aminotransferase/glutamine transaminase K from rat brain
- Author
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Malherbe, P., Alberati-Giani, D., Koehler, C., and Cesura, A. M.
- Published
- 1995
- Full Text
- View/download PDF
40. Biodiversity at risk in the SPAMI Pelagos Sanctuary: The impact of marine litter on biota.
- Author
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Fossi MC, Baini M, Galli M, Tepsich P, Grossi F, Concato M, Giani D, Rosso M, Borroni A, Romeo T, and Panti C
- Abstract
The Mediterranean basin is the second largest global biodiversity hotspot in the world, which coexists with a plethora of anthropogenic stress. This study examines the risks that marine litter poses to Mediterranean biodiversity, using the Special Protection Area of Mediterranean Importance (SPAMI) "Pelagos Sanctuary" as a case study. In this paper, a new survey method and data analysis strategies to assess the impact of marine litter, including microplastics, on Mediterranean organisms, is proposed. A total of 23 species, from invertebrates to cetaceans, were analysed using two main monitoring approaches. In the first approach, the core density distribution areas of 11 megafauna species (elasmobranchs, sea turtles, seabirds, and cetaceans) and 4 invertebrate species were evaluated through an extended field survey. Simultaneously, monitoring of floating macro- and micro-litter was performed to be overlapped with the species distribution and abundance. The second monitoring approach assessed the ingestion of marine litter, microplastics and the levels of plastic additives in 10 stranded megafauna species and in 7 invertebrate and fish species. The final data processing, merging the data on biodiversity and marine litter abundance and distribution in the environment, with the data of ingested marine litter, microplastics, and plastic additives in sentinel species, allowed to: a) create risk maps for the species inhabiting the Pelagos Sanctuary, identifying critical areas for biodiversity conservation; b) identify the most exposed species to the risk of marine litter by an "exposure score"; c) to select sentinel species for pelagic environment., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2025 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2025
- Full Text
- View/download PDF
41. A multi-compartment monitoring approach to assess the impact of marine litter in a Mediterranean coastal area.
- Author
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Giani D, Baini M, Panti C, Galli M, Caliani I, Concato M, Casini S, and Fossi MC
- Abstract
Marine litter, particularly microplastics, is a growing threat to the Mediterranean Sea, impacting biodiversity and ecosystem health. However, most studies conducted in the Mediterranean Sea have focused on monitoring of only specific environmental compartments, and rarely have highlighted the overall impacts affecting an area. Therefore, using a new multi-compartment monitoring approach and a standardized methodology, this study investigates the abundance, distribution, composition and impact of marine litter on beaches, surface waters, fish and mussels in a coastal area of Tuscany (Italy). Concerning beach macro litter values, significant differences were found among the three beaches analysed, with the highest amount in the Feniglia beach (mean value = 1245 items/100 m). The top items found are cotton bud sticks (32.3 %), which in the winter survey at Feniglia beach, reached a remarkable density of 1983 items/100 m. Microlitter (1-5 mm), was detected in the beach sediments with a mean abundance of 130 items/m
2 . Regarding floating macrolitter, the transect with the highest values was the Feniglia site at 3 nautical miles in autumn (1083 items/km2 ) while for floating microlitter the highest concentration (832,683 MPs/km2 ) was found in front of Scarlino. Of the 234 fish analysed from 5 different species, 67 contained microplastics in the gastrointestinal tract (28 %) with a mean value of 0.4 items per individual. The species with the highest occurrence was the European anchovy (Engraulis encrasicolus) (53 %) followed by the bogue (Boops boops) (40 %). Through the application of the Marine Litter Impact Index (MLII), considering all the compartments analysed, the Feniglia area emerges as the ecosystem most impacted by marine litter (mean MLII = 3.5, high). This study highlights how a multi-compartment monitoring approach is crucial for understanding the complex interactions between land, sea, and biota., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:, (Copyright © 2024. Published by Elsevier Ltd.)- Published
- 2024
- Full Text
- View/download PDF
42. Plasticizers levels in four fish species from the Ligurian Sea and Central Adriatic Sea (Mediterranean Sea) and potential risk for human consumption.
- Author
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Dettoto C, Maccantelli A, Barbieri MV, Baini M, Fernández-Arribas J, Panti C, Giani D, Galli M, Eljarrat E, and Fossi MC
- Subjects
- Animals, Mediterranean Sea, Risk Assessment, Humans, Fishes metabolism, Phthalic Acids analysis, Food Contamination analysis, Environmental Monitoring, Seafood analysis, Flame Retardants analysis, Italy, Plasticizers analysis, Water Pollutants, Chemical analysis
- Abstract
Plastic materials contain additives such as plasticizers and flame retardants, which are not covalently bound to plastic polymers and can therefore be unintentionally released into the marine environment. This study investigated three families of compounds, phthalates (PAEs), organophosphate esters (OPEs), and non-phthalate plasticizers (NPPs) currently used as plastic additives, in 48 muscle samples of bogue (Boops boops), European hake (Merluccius merluccius), red mullet (Mullus barbatus), and European pilchard (Sardina pilchardus) sampled in the Central Adriatic and the Ligurian Seas. The additional goal of this study is to assess the potential risk to human health from fish consumption with the objective of determining whether the detected levels might potentially pose a concern. PAEs represent the majority of the plastic additives detected in the selected species, with ubiquitous distribution across the study areas, whereas for OPEs and NPPs, there is a more pronounced difference between the two study areas, suggesting that these compounds may represent different exposure levels in the two seas. Among PAEs, bis(2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), and diisobutyl phthalate (DIBP) were the most abundant compounds, reaching levels up to 455 ng/g ww. OPEs were detected at higher concentrations in samples from the Ligurian Sea, and triethyl phosphate (TEP) was the most abundant compound. Among the NPPs, acetyl tributyl citrate (ATBC) was most frequently detected. From the results obtained, fish consumption may not pose a risk to human health (Hazard Quotient<1) but needs to be considered in future studies. Given the limited number of studies on PAEs, OPEs and NPPs in the Mediterranean Sea, further research is necessary to understand their potential bioaccumulation in marine organisms., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
43. Oceanographic and anthropogenic variables driving marine litter distribution in Mediterranean protected areas: Extensive field data supported by forecasting modelling.
- Author
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Galli M, Baini M, Panti C, Giani D, Caliani I, Campani T, Rosso M, Tepsich P, Levati V, Laface F, Romeo T, Scotti G, Galgani F, and Fossi MC
- Abstract
Marine litter concentration in the Mediterranean Sea is strongly influenced both by anthropogenic pressures and hydrodynamic factors that locally characterise the basin. Within the Plastic Busters MPAs (Marine Protected Areas) Interreg Mediterranean Project, a comprehensive assessment of floating macro- and microlitter in the Pelagos Sanctuary and the Tuscan Archipelago National Park was performed. An innovative multilevel experimental design has been planned ad-hoc according to a litter provisional distribution model, harmonising and implementing the current sampling methodologies. The simultaneous presence of floating macro- and microlitter items and the potential influences of environmental and anthropogenic factors affecting litter distribution have been evaluated to identify hotspot accumulation areas representing a major hazard for marine species. A total of 273 monitoring transects of floating macrolitter and 141 manta trawl samples were collected in the study areas to evaluate the abundance and composition of marine litter. High mean concentrations of floating macrolitter (399 items/km
2 ) and microplastics (259,490 items/km2 ) have been found in the facing waters of the Gulf of La Spezia and Tuscan Archipelago National Park as well in the Genova canyon and Janua seamount area. Accordingly, strong litter inputs were identified to originate from the mainland and accumulate in coastal waters within 10-15 nautical miles. Harbours and riverine outfalls contribute significantly to plastic pollution representing the main sources of contamination as well as areas with warmer waters and weak oceanographic features that could facilitate its accumulation. The results achieved may indicate a potentially threatening trend of litter accumulation that may pose a serious risk to the Pelagos Sanctuary biodiversity and provide further indications for dealing with plastic pollution in protected areas, facilitating future management recommendations and mitigation actions in these fragile marines and coastal environments., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)- Published
- 2023
- Full Text
- View/download PDF
44. Monitoring the composition, sources and spatial distribution of seafloor litter in the Adriatic Sea (Mediterranean Sea) through Fishing for Litter initiatives.
- Author
-
Pasanisi E, Galasso G, Panti C, Baini M, Galli M, Giani D, Limonta G, Tepsich P, Delaney E, Fossi MC, and Pojana G
- Subjects
- Hunting, Mediterranean Sea, Plastics, Waste Products analysis, Environmental Monitoring
- Abstract
Although the seafloor is an important sink for marine litter, its less accessible environment makes seafloor litter the least studied component. Nevertheless, detailed monitoring of its composition and spatial distribution is urgently needed to develop appropriate mitigation strategies in areas exposed to multiple anthropogenic pressures, such as the Adriatic Sea. Commercial fisheries such as bottom trawls can serve as an opportunistic platform for collecting data on seafloor litter and help researchers in addressing the lack of data through Fishing for Litter initiatives. In this study, the crews of twelve trawlers from two Italian Adriatic ports collected seafloor litter as part of their Fishing for Litter initiatives. In addition to the classical scheme, the collected litter was sorted on board into different bags, and speed, duration and geographical coordinates of each haul were recorded to allow an assessment of both densities and spatial distribution. More than 600 kg of litter was removed from the seafloor by the fishers in approximately 1 month and characterised by the researchers on the docks. Most of the found items were made of synthetic polymers and related to packaging, fisheries and aquaculture activities. Abandoned, lost or discarded fishing gear and mussel nets were identified as of particular concern in the maritime compartment of Chioggia and Civitanova Marche, respectively. Three hotspots for marine litter were identified: near the Venice lagoon, in the centre of the northern basin and at greater depth in the central Adriatic. This study provides a detailed picture of the spatial distribution and composition of seafloor litter in the areas studied and highlights the importance of increased cooperation between fishermen and scientists to improve the identification of hotspots and sources while removing marine litter from the seafloor and raising awareness of the problem., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
- Published
- 2023
- Full Text
- View/download PDF
45. Trophic niche influences ingestion of micro- and mesoplastics in pelagic and demersal fish from the Western Mediterranean Sea.
- Author
-
Giani D, Andolina C, Baini M, Panti C, Sciandra M, Vizzini S, and Fossi MC
- Subjects
- Animals, Eating, Mediterranean Sea, Plastics, Environmental Monitoring, Fishes, Microplastics, Water Pollutants, Chemical toxicity, Water Pollutants, Chemical analysis
- Abstract
Plastic pollution has been extensively documented in the marine food web, but targeted studies focusing on the relationship between microplastic ingestion and fish trophic niches are still limited. In this study we investigated the frequency of occurrence and the abundance of micro- and mesoplastics (MMPs) in eight fish species with different feeding habits from the western Mediterranean Sea. Stable isotope analysis (δ
13 C and δ15 N) was used to describe the trophic niche and its metrics for each species. A total of 139 plastic items were found in 98 out of the 396 fish analysed (25%). The bogue revealed the highest occurrence with 37% of individuals with MMPs in their gastrointestinal tract, followed by the European sardine (35%). We highlighted how some of the assessed trophic niche metrics seem to influence MMPs occurrence. Fish species with a wider isotopic niche and higher trophic diversity were more probable to ingest plastic particles in pelagic, benthopelagic and demersal habitats. Additionally, fish trophic habits, habitat and body condition influenced the abundance of ingested MMPs. A higher number of MMPs per individual was found in zooplanktivorous than in benthivore and piscivorous species. Similarly, our results show a higher plastic particles ingestion per individual in benthopelagic and pelagic species than in demersal species, which also resulted in lower body condition. Altogether, these results suggest that feeding habits and trophic niche descriptors can play a significant role in the ingestion of plastic particles in fish species., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)- Published
- 2023
- Full Text
- View/download PDF
46. Detection of anthropogenic fibres in marine organisms: Knowledge gaps and methodological issues.
- Author
-
Concato M, Panti C, Baini M, Galli M, Giani D, and Fossi MC
- Subjects
- Aquatic Organisms, Environmental Monitoring methods, Microplastics, Plastics analysis, Water Pollutants, Chemical analysis
- Abstract
Most studies examining the occurrence of plastics and microplastics in marine organisms have identified anthropogenic fibres, of natural and synthetic origin, as the most commonly occurring category. Anthropogenic fibres may have been chemically treated with additives making them more persistent and a potential threat to marine organisms. However, fibres have often been excluded from analytical data for the difficulties related to the sampling and analytical procedures, including potential overestimation of the results due to airborne contamination. This review aimed to collect and analyse all studies focusing on the interaction between anthropogenic fibres and marine organisms worldwide, highlighting critical issues that need to be overcome for the analysis fibres on marine organisms. Furthermore, emphasis was placed on the species studied in the Mediterranean Sea, which is particularly affected by this type of pollution. Overall, this review shows that fibre pollution is an underestimated threat to marine organisms and that a specific, harmonised protocol for the analysis of different anthropogenic fibres needs to be developed., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
47. Gradients of Variation in the At-Vessel Mortality Rate between Twelve Species of Sharks and Skates Sampled through a Fishery-Independent Trawl Survey in the Asinara Gulf (NW Mediterranean Sea).
- Author
-
Scacco U, Fortibuoni T, Baini M, Franceschini G, Giani D, Concato M, Panti C, Izzi A, and Angiolillo M
- Abstract
Elasmobranchs are priority species for conservation due to their rapid decline determined by the unbalanced struggle between a fragile bio-ecology and strong anthropogenic impacts, such as bycatch from professional fishing. In this context, measuring species resistance to catch of poorly selective gear is of paramount importance. During June-October 2022, five experimental fishing campaigns were carried out in the Asinara Gulf (northern Sardinia) through 35 geographically and bathymetrically representative hauls of an area between 30 and 600 m in depth. Skates prevailed over sharks in the number of species, with seven and five species, respectively. We first evaluated the status of each individual with respect to stress due to the trawl's catch using a three-graded scale. We also recorded individual biometrics (total and disk length, weight and sex, and maturity for males) on board by implementing the best practices in manipulating individuals for physiological recovery and release at sea. After capture, skates resulted in generally better conditions than sharks, although deepwater species of both groups exhibited a worse state than coastal species. The estimated vitality rates also depended on the size of the individuals. This work provides standardized data on the intermingled effect of size, species type, and inhabited depth on the resistance response of some elasmobranch species against capture by trawl fishery activities.
- Published
- 2023
- Full Text
- View/download PDF
48. Serosurvey of West Nile virus (WNV) in free-ranging raptors from Brazil.
- Author
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Morel AP, Webster A, Zitelli LC, Umeno K, Souza UA, Prusch F, Anicet M, Marsicano G, Bandarra P, Trainini G, Stocker J, Giani D, Fortes FB, Goenaga S, and Reck J
- Subjects
- Animals, Animals, Wild immunology, Antibodies, Viral blood, Bird Diseases epidemiology, Bird Diseases transmission, Brazil, Flavivirus classification, Flavivirus immunology, Flavivirus isolation & purification, Humans, Seroepidemiologic Studies, West Nile Fever epidemiology, West Nile virus genetics, West Nile virus isolation & purification, Animals, Wild virology, Bird Diseases virology, Raptors immunology, Raptors virology, West Nile Fever veterinary, West Nile virus immunology
- Abstract
West Nile virus (WNV) is a mosquito-borne Flavivirus that can affect birds, horses, and humans, and is the only zoonotic Flavivirus that has been identified in six continents. In Brazil, until 2010, there was no evidence of WNV circulation. Recently, the virus was isolated from a horse with encephalitis, and the first human cases were registered in Brazil. Despite that, there is still no information on the enzootic cycle of this virus in birds or wildlife. This study aimed to investigate whether there is evidence of WNV circulation among wild birds from Southern Brazil. For this, we used free-living wild raptors (live-trapped or rescued) as potential sentinels to investigate the presence of WNV antibodies using ELISA and plaque reduction neutralization test (PRNT) assay. In addition, the presence of nucleic acids from Flavivirus family members was investigated. None of the birds sampled presented clinical findings compatible with WNV. Of the 200 serum samples from birds of prey belonging to 21 species, ten (5%) were positive for the presence of WNV antibodies on ELISA testing. The PRNT test did not confirm the ELISA results, but indicated that three birds had possibly been exposed to Saint Louis encephalitis virus (SLEV). All samples were negative for Flavivirus RNA. The results presented here evince the need for permanent surveillance for emerging flaviviruses in Brazil, as well as for a contingency policy in the case of human/animal outbreaks, particularly in high-risk areas.
- Published
- 2021
- Full Text
- View/download PDF
49. Interlaboratory comparison of microplastic extraction methods from marine biota tissues: A harmonization exercise of the Plastic Busters MPAs project.
- Author
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Tsangaris C, Panti C, Compa M, Pedà C, Digka N, Baini M, D'Alessandro M, Alomar C, Patsiou D, Giani D, Romeo T, Deudero S, and Fossi MC
- Subjects
- Animals, Biota, Environmental Monitoring, Hydrogen Peroxide, Microplastics, Plastics, Water Pollutants, Chemical analysis
- Abstract
In the framework of the Plastic Busters MPAs project, a harmonization exercise on two methods of microplastic extraction from biological samples i.e. 15% H
2 O2 digestion and 10% KOH digestion was carried out. The two methods were tested in four laboratories on fish gastrointestinal tracts and mussel tissues spiked with polyethylene, polypropylene and polyethylene terephthalate. The recovery percentage of microplastics for each method, species and polymer tested were overall similar among laboratories, and interlaboratory coefficient of variation was less than 11% for the majority of samples. Microplastic recovery rates for the two methods were similar for each sample tested, but overall mean interlaboratory recovery rate using KOH (96.67%) was higher than H2 O2 (88.75%). Results validate the use of both methods for extracting microplastics from biota tissues. However, when comparing the two methods in terms of microplastic recovery rate, time consumed, technical difficulties and cost, digestion with 10% KOH is considered optimal., (Copyright © 2021 Elsevier Ltd. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
50. Molecular detection and phylogenetic relationship of Haemosporida parasites in free-ranging wild raptors from Brazil.
- Author
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Morel AP, Webster A, Prusch F, Anicet M, Marsicano G, Trainini G, Stocker J, Giani D, Bandarra PM, da Rocha MIS, Zitelli LC, Umeno KA, Souza UA, Dall'Agnol B, and Reck J
- Subjects
- Animals, Brazil epidemiology, Haemosporida classification, Phylogeny, Raptors parasitology
- Abstract
The order Haemosporida is widely distributed parasitizing members of the Aves class. In birds of prey, infection with Plasmodium spp. parasites varies from an apathogenic form to a clinical syndrome. However, studies on Haemosporida in raptors from the neotropical region are scarce. The aim of this study was to investigate natural infection by Plasmodium spp., Haemoproteus spp. and Leucocytozoon spp. in free-ranging wild raptors from southern Brazil. For this, we sampled 206 individuals of 21 species: 94 live-trapped Southern Caracaras (Caracara plancus) and 112 raptors from other species that were brought to rehabilitation centers. The presence of infection was investigated using a nested-PCR for Haemosporida performed on blood samples. Overall, 56 out of 206 birds were positive for Plasmodium spp./Haemoproteus spp. Twenty-two percent (21/94) of the C. plancus samples were positive. Of the 112 wild raptors rescued, 31% (35/112) of those belonging to 15 other species tested positive. No sample was positive for Leucocytozoon spp. Herein, we demonstrated nine lineages of Haemosporidian parasites (eight Plasmodium sp. and one Haemoproteus sp.) in free-living species of Brazilian birds of prey, being six of them potential novel lineages. It suggests that information currently available on South-American haemosporidian from these birds greatly underestimate the potential lineage diversity in this region., (Copyright © 2020 Elsevier B.V. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
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