1,282 results on '"Volf, P"'
Search Results
2. Effects of individual traits vs. trait syndromes on assemblages of various herbivore guilds associated with central European Salix
- Author
-
Leong, Jing V., Mezzomo, Priscila, Kozel, Petr, Volfová, Tereza, de Lima Ferreira, Paola, Seifert, Carlo L., Butterill, Phillip T., Freiberga, Inga, Michálek, Jan, Matos-Maraví, Pável, Weinhold, Alexander, Engström, Marica T., Salminen, Juha-Pekka, Segar, Simon T., Sedio, Brian E., and Volf, Martin
- Published
- 2024
- Full Text
- View/download PDF
3. Simulated Herbivory Affects the Volatile Emissions of Oak Saplings, while Neighbourhood Affects Flavan-3-ols Content of Their Leaves
- Author
-
Molleman, Freerk, Mandal, Manidip, Sokół-Łętowska, Anna, Walczak, Urszula, Volf, Martin, Mallick, Soumen, Moos, Martin, Vodrážka, Petr, Prinzing, Andreas, and Mezzomo, Priscila
- Published
- 2024
- Full Text
- View/download PDF
4. Phlebotomine sand fly survey, blood meal source identification, and description of Sergentomyia imihra n. sp. in the central Sahara of Algeria
- Author
-
Kamal Eddine Benallal, Mohammed Mefissel, Yassine Dib, Jérôme Depaquit, Daniel Kavan, Zoubir Harrat, Vít Dvořák, Petr Volf, and Petr Halada
- Subjects
Leishmaniasis ,Phlebotomus ,Sergentomyia ,Barcode ,Blood meal ,MALDI-TOF mass spectrometry ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Phlebotomine sand flies (Diptera: Psychodidae) are important vectors of various pathogens, mainly Leishmania parasites. In the Old World, the most important genus in term of pathogens transmission is the genus Phlebotomus, which includes many proven or suspected vectors of several Leishmania species, while the genus Sergentomyia remains so far unproven as a vector of human pathogens. Algeria is one of the most affected countries by human leishmaniasis. Methods In the present study, an entomological survey was carried out in two provinces, Ghardaïa and Illizi, located in the north and central Sahara, respectively, where cases of human leishmaniasis are recorded. Our goal was to understand the role of the local sand fly species in the transmission of Leishmania parasites and to analyze their blood meal preferences. Collected sand flies were identified by a combination of morphological and molecular approaches that included DNA-barcoding and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) protein profiling. In addition, female blood meals were analyzed by peptide mass mapping using MALDI-TOF MS. Results In total, 640 sand fly specimens belonging to Phlebotomus and Sergentomyia genera were collected in the two provinces. Sergentomyia antennata and Se. fallax were most abundant species in Ghardaïa, and Ph. papatasi and Ph. alexandri in Illizi. In addition, a new sand fly species was described in Illizi named Sergentomyia (Sergentomyia) imihra n. sp. Blood meal analysis of the engorged females revealed various mammalian hosts, especially goats, but also humans for Phlebotomus papatasi and Ph. alexandri, suggesting that these vector species are opportunistic feeders. Conclusions Integrative approach that combined morphological analysis, sequencing of DNA markers, and protein profiling enabled the recognition and description of a new Sergentomyia species, raising the number of the Algerian sand fly fauna to 27 species. Further sand fly surveillance in the central Sahara is recommended to identify the thus-far unknown males of Se. imihra n. sp. Graphical Abstract
- Published
- 2024
- Full Text
- View/download PDF
5. Immunoglobulin secretion influences the composition of chicken caecal microbiota
- Author
-
Jiri Volf, Bernd Kaspers, Benjamin Schusser, Magdalena Crhanova, Daniela Karasova, Hana Stepanova, Vladimir Babak, and Ivan Rychlik
- Subjects
Medicine ,Science - Abstract
Abstract The chicken caecum is colonised by hundreds of different bacterial species. Which of these are targeted by immunoglobulins and how immunoglobulin expression shapes chicken caecal microbiota has been addressed in this study. Using cell sorting followed by sequencing of V3/V4 variable region of 16S rRNA, bacterial species with increased or decreased immunoglobulin coating were determined. Next, we determined also caecal microbiota composition in immunoglobulin knockout chickens. We found that immunoglobulin coating was common and major taxa were coated with immunoglobulins. Similarly, more taxa required immunoglobulin production for caecum colonisation compared to those which became abundant in immunoglobulin-deficient chickens. Taxa with low immunoglobulin coating such as Lactobacillus, Blautia, [Eubacterium] hallii, Megamonas, Fusobacterium and Desulfovibrio all encode S-layer proteins which may reduce interactions with immunoglobulins. Although there were taxa which overgrew in Ig-deficient chickens (e.g. Akkermansia) indicating immunoglobulin production acted to exclude them from the chicken caecum, in most of the cases, immunoglobulin production more likely contributed to fixing the desired microbiota in the chicken caecum.
- Published
- 2024
- Full Text
- View/download PDF
6. Stability and suitability of housekeeping genes in phlebotomine sand flies
- Author
-
Fabiana Sassù, Barbora Vomáčková Kykalová, Cecilia Stahl Vieira, Petr Volf, and Erich Loza Telleria
- Subjects
Phlebotomus ,Lutzomyia ,Gene expression ,Reference gene ,Endogenous control gene ,Gene stability ,Medicine ,Science - Abstract
Abstract We investigated gene expression patterns in Lutzomyia and Phlebotomus sand fly vectors of leishmaniases. Using quantitative PCR, we assessed the expression stability of potential endogenous control genes commonly used in dipterans. We analyzed Lutzomyia longipalpis and Phlebotomus papatasi samples from L3 and L4 larval stages, adult sand flies of different sexes, diets, dsRNA injection, and Leishmania infection. Six genes were evaluated: actin, α-tubulin, GAPDH, 60 S ribosomal proteins L8 and L32 (RiboL8 and RiboL32), and elongation factor 1-α (EF1-α). EF1-α was among the most stably expressed along with RiboL8 in L. longipalpis larvae and RiboL32 in adults. In P. papatasi, EF1-α and RiboL32 were the top in larvae, while EF1-α and actin were the most stable in adults. RiboL8 and actin were the most stable genes in dissected tissues and infected guts. Additionally, five primer pairs designed for L. longipalpis or P. papatasi were effective in PCR with Lutzomyia migonei, Phlebotomus duboscqi, Phlebotomus perniciosus, and Sergentomyia schwetzi cDNA. Furthermore, L. longipalpis RiboL32 and P. papatasi α-tubulin primers were suitable for qPCR with cDNA from the other four species. Our research provides tools to enhance relative gene expression studies in sand flies, facilitating the selection of endogenous control for qPCR.
- Published
- 2024
- Full Text
- View/download PDF
7. Health Promotion Policies, Perceptions, Actions and Needs in Sports Clubs in Ireland
- Author
-
Aurelie Van Hoye, Benny Cullen, Aoife Lane, Kevin Volf, Liam Kelly, Enrique Garcia Bengoechea, Anne Vuillemin, and Catherine Woods
- Abstract
Objective: Policy development is the biggest gap for health-promoting sports clubs. The present study aims to identify Irish sports club's involvement in health promotion (HP) policy development. Design: Mixed methods concurrent survey design, with quantitative data providing insights into priorities, activities and documentation and qualitative data documenting stakeholders' perceived needs. Setting: Two hundred and thirty-nine sports clubs in Ireland. Method: The survey measured perceptions of HP, the importance of promoting 10 health topics (e.g. suicide prevention, healthy eating, addictive behaviours) and corresponding actions relevant to HP in club policy documents and future needs. Quantitative data were analysed using multivariate statistics. The policy cycle was used to conduct a deductive analysis of qualitative data on sports clubs' perceived needs. Results: A high importance score (>70%) was found for the 10 health topics. Sports clubs reported their greatest investment was in physical activity promotion, and the lowest investment was in supporting the participation of disabled people. Up to two thirds of sports clubs had no HP policy. Irish sports clubs' perceptions of HP showed higher but similar patterns of response relative to sports clubs in other countries. Conclusion: Findings suggest that sports clubs consider HP to be an important part of their remit, but up to 66% have no policy in this regard. The policy cycle analysis helped identify the key tools needed to promote sports clubs' HP policy development. Practical implications include fostering the inclusion of HP in sports clubs' development plans by establishing templates and receiving support from sports federations.
- Published
- 2024
- Full Text
- View/download PDF
8. Assessment of the exposure to Phlebotomus perniciosus and the presence of anti-Leishmania infantum antibodies in stray cats in an endemic region of Spain, and their potential correlation with environmental factors
- Author
-
Diana Marteles, María Victoria Martínez, Antonio Fernández, Cristina Riera, Roser Fisa, Xavier Roca-Geronès, Sarah Chavez-Fisa, Sergio Castañeda, Juan David Ramírez, Janine Elizabeth Davis, Petra Sumova, Petr Volf, Maite Verde, Ana González, María Magdalena Alcover, and Sergio Villanueva-Saz
- Subjects
Cat ,ELISA ,Leishmania infantum ,Phlebotomus perniciosus ,serology ,western blotting ,Veterinary medicine ,SF600-1100 - Abstract
Phlebotomus perniciosus is a major vector of Leishmania infantum in the Mediterranean. While the seroprevalence of leishmaniosis in Spanish dogs and cats has been studied, data on the exposure of cats to P. perniciosus bites under natural conditions without repellents is limited. Stray cats could serve as sentinels for L. infantum and P. perniciosus exposure. This study analyzed sera from 204 apparently healthy stray cats, collected from January 2021 to January 2022, for antibodies against P. perniciosus saliva and L. infantum parasites. Anti-sand fly antibodies were detected in 40.69% of cats using an ELISA with the recombinant salivary protein SP03B of P. perniciosus. Seroprevalence of L. infantum infection was 23.52% by Western blot and 27.41% by ELISA, with an overall seroprevalence of 40.69% (95% CI 34.18–47.54%). This is the first assessment of antibody response to P. perniciosus saliva and L. infantum in naturally exposed stray cats in Spain. Further research is needed to examine the salivary antigens recognized by cats and to explore the relationship between P. perniciosus exposure and L. infantum infection severity in cats.
- Published
- 2024
- Full Text
- View/download PDF
9. Phlebotomine sand fly survey, blood meal source identification, and description of Sergentomyia imihra n. sp. in the central Sahara of Algeria
- Author
-
Benallal, Kamal Eddine, Mefissel, Mohammed, Dib, Yassine, Depaquit, Jérôme, Kavan, Daniel, Harrat, Zoubir, Dvořák, Vít, Volf, Petr, and Halada, Petr
- Published
- 2024
- Full Text
- View/download PDF
10. Immunoglobulin secretion influences the composition of chicken caecal microbiota
- Author
-
Volf, Jiri, Kaspers, Bernd, Schusser, Benjamin, Crhanova, Magdalena, Karasova, Daniela, Stepanova, Hana, Babak, Vladimir, and Rychlik, Ivan
- Published
- 2024
- Full Text
- View/download PDF
11. Stability and suitability of housekeeping genes in phlebotomine sand flies
- Author
-
Sassù, Fabiana, Vomáčková Kykalová, Barbora, Vieira, Cecilia Stahl, Volf, Petr, and Loza Telleria, Erich
- Published
- 2024
- Full Text
- View/download PDF
12. Sand fly blood meal volumes and their relation to female body weight under experimental conditions
- Author
-
Volfová, Věra, Jančářová, Magdalena, and Volf, Petr
- Published
- 2024
- Full Text
- View/download PDF
13. Discovery of essential kinetoplastid-insect adhesion proteins and their function in Leishmania-sand fly interactions
- Author
-
Yanase, Ryuji, Pruzinova, Katerina, Owino, Barrack O., Rea, Edward, Moreira-Leite, Flávia, Taniguchi, Atsushi, Nonaka, Shigenori, Sádlová, Jovana, Vojtkova, Barbora, Volf, Petr, and Sunter, Jack D.
- Published
- 2024
- Full Text
- View/download PDF
14. Hypothetical mechanisms driving physical activity levels in ethnic minority groups living in Europe: a systematically identified evidence-based conceptual systems model
- Author
-
Sawyer, Alexia D. M., van Lenthe, Frank, Kamphuis, Carlijn, Bengoechea, Enrique Garcia, Luszczynska, Aleksandra, Terragni, Laura, Volf, Kevin, Roos, Gun, Woods, Catherine, Forberger, Sarah, Scheidmeir, Marie, Langøien, Lars Jørun, Neumann-Podczaska, Agnieszka, Wieczorowska-Tobis, Katarzyna, and Stronks, Karien
- Published
- 2024
- Full Text
- View/download PDF
15. Smelly interactions: host-borne volatile organic compounds triggering behavioural responses in mosquitoes, sand flies, and ticks
- Author
-
Bezerra-Santos, Marcos Antonio, Benelli, Giovanni, Germinara, Giacinto Salvatore, Volf, Petr, and Otranto, Domenico
- Published
- 2024
- Full Text
- View/download PDF
16. ParSCo: celebrating 10 years of a unique parasitology summer course
- Author
-
Dantas-Torres, Filipe, Bezerra-Santos, Marcos Antonio, Mendoza-Roldan, Jairo Alfonso, Lia, Riccardo Paolo, Perles, Livia, Barrera, Juan Pedro, Fagundes-Moreira, Renata, Carbonara, Mariaelisa, Varcasia, Antonio, Brianti, Emanuele, Deak, Georgiana, Rojas, Alicia, Miró, Guadalupe, Volf, Petr, Baneth, Gad, and Otranto, Domenico
- Published
- 2024
- Full Text
- View/download PDF
17. A sustainable bio-based char as emerging electrode material for energy storage applications
- Author
-
Hristea, Gabriela, Iordoc, Mihai, Lungulescu, Eduard-Marius, Bejenari, Iuliana, and Volf, Irina
- Published
- 2024
- Full Text
- View/download PDF
18. EMID2 is a novel biotherapeutic for aggressive cancers identified by in vivo screening
- Author
-
Cappelletto, Ambra, Alfì, Edoardo, Volf, Nina, Vu, Thi Van Anh, Bortolotti, Francesca, Ciucci, Giulio, Vodret, Simone, Fantuz, Marco, Perin, Martina, Colliva, Andrea, Rozzi, Giacomo, Rossi, Matilde, Ruozi, Giulia, Zentilin, Lorena, Vuerich, Roman, Borin, Daniele, Lapasin, Romano, Piazza, Silvano, Chiesa, Mattia, Lorizio, Daniela, Triboli, Luca, Kumar, Sandeep, Morello, Gaia, Tripodo, Claudio, Pinamonti, Maurizio, Piperno, Giulia Maria, Benvenuti, Federica, Rustighi, Alessandra, Jo, Hanjoong, Piccolo, Stefano, Del Sal, Giannino, Carrer, Alessandro, Giacca, Mauro, and Zacchigna, Serena
- Published
- 2024
- Full Text
- View/download PDF
19. Sex Differences in the Effect of Brain-Derived Neurotrophic Factor (BDNF) Val66Met Polymorphism on Baseline EEG Connectivity
- Author
-
Privodnova, E. Yu. and Volf, N. V.
- Published
- 2024
- Full Text
- View/download PDF
20. Sand fly blood meal volumes and their relation to female body weight under experimental conditions
- Author
-
Věra Volfová, Magdalena Jančářová, and Petr Volf
- Subjects
Phlebotomus ,Lutzomyia ,Sergentomyia ,Blood meal ,Prediuresis ,Haemoglobin ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Sand fly females require a blood meal to develop eggs. The size of the blood meal is crucial for fecundity and affects the dose of pathogens acquired by females when feeding on infected hosts or during experimental membrane-feeding. Methods Under standard laboratory conditions, we compared blood meal volumes taken by females of ten sand fly species from four genera: Phlebotomus, Lutzomyia, Migonomyia, and Sergentomyia. The amount of ingested blood was determined using a haemoglobin assay. Additionally, we weighed unfed sand flies to calculate the ratio between body weight and blood meal weight. Results The mean blood meal volume ingested by sand fly females ranged from 0.47 to 1.01 µl. Five species, Phlebotomus papatasi, P. duboscqi, Lutzomyia longipalpis, Sergentomyia minuta, and S. schwetzi, consumed about double the blood meal size compared to Migonomyia migonei. The mean body weight of females ranged from 0.183 mg in S. minuta to 0.369 mg in P. duboscqi. In males, the mean body weight ranged from 0.106 mg in M. migonei to 0.242 mg in P. duboscqi. Males were always lighter than females, with the male-to-female weight ratio ranging from 75% (in Phlebotomus argentipes) to 52% (in Phlebotomus tobbi). Conclusions Females of most species took a blood meal 2.25–3.05 times their body weight. Notably, the relatively tiny females of P. argentipes consumed blood meals 3.34 times their body weight. The highest (Mbl/Mf) ratios were found in both Sergentomyia species studied; females of S. minuta and S. schwetzi took blood meals 4.5–5 times their body weight. This parameter is substantially higher than that reported for mosquitoes and biting midges. Graphical Abstract
- Published
- 2024
- Full Text
- View/download PDF
21. Discovery of essential kinetoplastid-insect adhesion proteins and their function in Leishmania-sand fly interactions
- Author
-
Ryuji Yanase, Katerina Pruzinova, Barrack O. Owino, Edward Rea, Flávia Moreira-Leite, Atsushi Taniguchi, Shigenori Nonaka, Jovana Sádlová, Barbora Vojtkova, Petr Volf, and Jack D. Sunter
- Subjects
Science - Abstract
Abstract Leishmania species, members of the kinetoplastid parasites, cause leishmaniasis, a neglected tropical disease, in millions of people worldwide. Leishmania has a complex life cycle with multiple developmental forms, as it cycles between a sand fly vector and a mammalian host; understanding their life cycle is critical to understanding disease spread. One of the key life cycle stages is the haptomonad form, which attaches to insect tissues through its flagellum. This adhesion, conserved across kinetoplastid parasites, is implicated in having an important function within their life cycles and hence in disease transmission. Here, we discover the kinetoplastid-insect adhesion proteins (KIAPs), which localise in the attached Leishmania flagellum. Deletion of these KIAPs impairs cell adhesion in vitro and prevents Leishmania from colonising the stomodeal valve in the sand fly, without affecting cell growth. Additionally, loss of parasite adhesion in the sand fly results in reduced physiological changes to the fly, with no observable damage of the stomodeal valve and reduced midgut swelling. These results provide important insights into a comprehensive understanding of the Leishmania life cycle, which will be critical for developing transmission-blocking strategies.
- Published
- 2024
- Full Text
- View/download PDF
22. Hypothetical mechanisms driving physical activity levels in ethnic minority groups living in Europe: a systematically identified evidence-based conceptual systems model
- Author
-
Alexia D. M. Sawyer, Frank van Lenthe, Carlijn Kamphuis, Enrique Garcia Bengoechea, Aleksandra Luszczynska, Laura Terragni, Kevin Volf, Gun Roos, Catherine Woods, Sarah Forberger, Marie Scheidmeir, Lars Jørun Langøien, Agnieszka Neumann-Podczaska, Katarzyna Wieczorowska-Tobis, and Karien Stronks
- Subjects
Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background In Europe, physical activity levels tend to be lower in ethnic minority groups than the general population. Interventions and policies based on research examining isolated determinants of physical activity have had limited success in increasing physical activity levels. This study used systems dynamics theory and the capability approach theoretical framework to develop a conceptual model of how individual characteristics, institutional and physical environments and the migration context may interact to promote or hinder physical activity in ethnic minority groups living in Europe. Methods A systematic update of Langøien et al.’s 2017 review of the determinants of physical activity in ethnic minority groups living in Europe was conducted. Our target population included individuals of all ages who reported a familial migration background from any low- and middle-income countries or belonging to minority indigenous population in Europe. Outcomes pertaining to non-work related physical activity of light, moderate or vigorous intensity performed in any setting were included. Included studies provided an evidence base from which to derive the causal loop diagrams comprising our conceptual model. Sub-system causal loop diagrams were interpreted in co-author review sessions to explicate non-linear system mechanisms, such as reinforcing and balancing feedback loops. Results Forty-one studies were identified, of which the majority was qualitative. The conceptual model consisted of 4 causal loop diagrams relating to psychosocial constructs; sociocultural constructs; health and health communication and social and material resources, in interaction with environmental/migration context. Four hypothetical mechanisms were identified, e.g. hypothesizing that participation in organised activities leads to increased self-efficacy, thereby enabling further participation. Conclusions This study contributes an evidence-based conceptual systems model which elucidates how low levels of physical activity in ethnic minority groups in Europe could be supported by reinforcing and balancing mechanisms involving factors relating to physical and institutional environments, migration context and individuals. A pluralistic approach to literature review, integrating complexity methods such as CLDs into more conventional systematic literature review, supports novel insights into how factors could interact to support persistently low levels of activity, moving beyond the identification of potential relationships between isolated factors to indicating the ways in which these relationships are sustained and could be modified by intervention or policy.
- Published
- 2024
- Full Text
- View/download PDF
23. Why daylight should be a priority for urban planning
- Author
-
Carlo Volf, Bruno Bueno, Peter Edwards, Richard Hobday, Stephan Mäder, Barbara S. Matusiak, Katharina Wulff, Werner Osterhaus, Gabriele Manoli, Christina Della Giustina, Jasmin Joshi, Jerome H. Kämpf, Kevin Vega, and Christoph Kueffer
- Subjects
Architecture ,Daylight ,Ecosystem services ,Green city ,Health ,Nature-based solutions ,Urbanization. City and country ,HT361-384 ,Political institutions and public administration (General) ,JF20-2112 - Abstract
Daylight is essential for ecosystems and for the physical and mental well-being of people. In densely populated cities, only a small proportion of total daylight is available to support urban greenery and most people have little daily exposure to natural daylight. Despite this, many cities have followed a strategy of densification as a way of preventing urban sprawl and reducing energy consumption. In this article, we review the biological importance of daylight and show that urban densification leads to a reduction in the daylight available for both people and nature. We conclude that daylight in cities should be treated as a limiting resource that needs to be planned and managed carefully, much like water or energy. We suggest elements for a policy framework aimed at optimizing urban daylight, including how to determine daylight needs, how to determine the maximum viable urban density, and policy options for built and unbuilt areas.
- Published
- 2024
- Full Text
- View/download PDF
24. Effects of dim-evening lighting optimised for geographical orientation versus standard lighting on mental health: protocol paper for a quasiexperimental study in a psychiatric hospital
- Author
-
Carlo Volf, Paul Michael Petersen, Torben Skov Hansen, Klaus Martiny, Lone Baandrup, Dennis Dan Corell, Julie Margrethe Dubois, and Xinxi Zeng
- Subjects
Medicine - Abstract
Introduction Research has provided novel insights into how light stimulates circadian rhythms through specialised retinal ganglion cells to the suprachiasmatic nucleus. In addition, there has been a revolution in light-emitting diode (LED) technology, leading to tunable LED light sources and lighting systems, enabling 24-hour dynamic light scenarios with bright blue-enriched short wavelength light during the day and dim evening light, stimulating the circadian system. These dynamic LED lighting systems are now being implemented at hospitals without adequate understanding of how it may affect the health and well-being of patients and staff.Methods and analysis An optimised dynamic LED lighting scenario is investigated at a newly built psychiatric hospital in Copenhagen. In the 12 months baseline period, a standard lighting scenario with dynamic colour temperature and fixed light intensity is investigated. In the following 12-month intervention period, a new DEL scenario is investigated, having dynamic colour temperature as well as dynamic light intensity with a higher daytime and lower evening-time melanopic daylight equivalent illuminance. This setting is furthermore adjusted for geographical orientation to compensate for differences in sunlight access in wintertime. The study uses a quasiexperimental design comparing patients admitted in the two study periods. Prior to each of the study periods, daylight and the contribution from the LED-lighting scenarios was measured. Patient sociodemographic and mental health data will be retrieved retrospectively from electronic medical records and by questionnaires administered in the two periods, evaluating lighting, noise, sleep quality and quality of life. Primary outcome is the proportion of patients receiving pro re nata medications. Secondary outcomes are the length of stay, sleep onset latency, sleep quality and quality of life.Ethics and dissemination No ethical issues are expected. The results will be disseminated through peer-reviewed international journal, lectures, posters and interviews.Trial registration number NCT05868291.
- Published
- 2024
- Full Text
- View/download PDF
25. TinyDecisionTreeClassifier: Embedded C++ library for training and applying decision trees on the edge
- Author
-
Aleksei Karavaev, Jan Hejda, Patrik Kutilek, Petr Volf, Marek Sokol, and Lydie Leova
- Subjects
TinyML ,Decision tree ,Arduino ,C++ ,Machine learning ,Computer software ,QA76.75-76.765 - Abstract
Machine learning and AI remain hot topics in research. However, most machine-learning models are trained and applied to big data. Major electronics parts manufacturers are actively working on simplifying the deployment of machine learning models to their chips. Software companies provide microcontroller code generation after the training data are uploaded to their platform. Unfortunately, most of the available open-source solutions do not support training models on the edge. The proposed TinyDecisionTreeClassifier is a standalone open-source C++ library that allows both training and deployment on the edge. This paper also covers the deployment and benchmark of the software performance and power consumption on some of the commonly used microcontrollers.
- Published
- 2024
- Full Text
- View/download PDF
26. Nine-year bird community development on Radovesická spoil heap: impacts of restoration approach and vegetation characteristics
- Author
-
Korejs, Kryštof, Šálek, Miroslav, Bejček, Vladimír, Musil, Petr, Šťastný, Karel, Volf, Ondřej, and Riegert, Jan
- Published
- 2024
- Full Text
- View/download PDF
27. Correction: Effects of individual traits vs. trait syndromes on assemblages of various herbivore guilds associated with central European Salix
- Author
-
Leong, Jing V., Mezzomo, Priscila, Kozel, Petr, Volfová, Tereza, de Lima Ferreira, Paola, Seifert, Carlo L., Butterill, Phillip T., Freiberga, Inga, Michálek, Jan, Matos-Maraví, Pável, Weinhold, Alexander, Engström, Marica T., Salminen, Juha-Pekka, Segar, Simon T., Sedio, Brian E., and Volf, Martin
- Published
- 2024
- Full Text
- View/download PDF
28. Ruzigrass as cover crop improves the potassium partial balance and use by subsequent cotton
- Author
-
Echer, Fábio Rafael, Volf, Marcelo Raphael, Peres, Vinícius José Souza, Hafemann, Jaqueline Angelotti, Silva, Gustavo Ricardo Aguiar, and Rosolem, Ciro Antonio
- Published
- 2023
- Full Text
- View/download PDF
29. Smelly interactions: host-borne volatile organic compounds triggering behavioural responses in mosquitoes, sand flies, and ticks
- Author
-
Marcos Antonio Bezerra-Santos, Giovanni Benelli, Giacinto Salvatore Germinara, Petr Volf, and Domenico Otranto
- Subjects
Attraction ,Host searching ,Insect vectors ,Questing ,Repellent ,Vector-borne pathogens ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Volatile organic compounds (VOCs) are chemicals emitted as products of cell metabolism, which reflects the physiological and pathological conditions of any living organisms. These compounds play a key role as olfactory cues for arthropod vectors such as mosquitoes, sand flies, and ticks, which act in the transmission of pathogens to many animal species, including humans. Some VOCs may influence arthropod behaviour, e.g., host preference and oviposition site selection for gravid females. Furthermore, deadly vector-borne pathogens such as Plasmodium falciparum and Leishmania infantum are suggested to manipulate the VOCs profile of the host to make them more attractive to mosquitoes and sand fly vectors, respectively. Under the above circumstances, studies on these compounds have demonstrated their potential usefulness for investigating the behavioural response of mosquitoes, sand flies, and ticks toward their vertebrate hosts, as well as potential tools for diagnosis of vector-borne diseases (VBDs). Herein, we provide an account for scientific data available on VOCs to study the host seeking behaviour of arthropod vectors, and their usefulness as attractants, repellents, or tools for an early diagnosis of VBDs. Graphical Abstract
- Published
- 2024
- Full Text
- View/download PDF
30. Shifts 2.0: Extending The Dataset of Real Distributional Shifts
- Author
-
Malinin, Andrey, Athanasopoulos, Andreas, Barakovic, Muhamed, Cuadra, Meritxell Bach, Gales, Mark J. F., Granziera, Cristina, Graziani, Mara, Kartashev, Nikolay, Kyriakopoulos, Konstantinos, Lu, Po-Jui, Molchanova, Nataliia, Nikitakis, Antonis, Raina, Vatsal, La Rosa, Francesco, Sivena, Eli, Tsarsitalidis, Vasileios, Tsompopoulou, Efi, and Volf, Elena
- Subjects
Computer Science - Machine Learning ,Computer Science - Artificial Intelligence ,Statistics - Machine Learning - Abstract
Distributional shift, or the mismatch between training and deployment data, is a significant obstacle to the usage of machine learning in high-stakes industrial applications, such as autonomous driving and medicine. This creates a need to be able to assess how robustly ML models generalize as well as the quality of their uncertainty estimates. Standard ML baseline datasets do not allow these properties to be assessed, as the training, validation and test data are often identically distributed. Recently, a range of dedicated benchmarks have appeared, featuring both distributionally matched and shifted data. Among these benchmarks, the Shifts dataset stands out in terms of the diversity of tasks as well as the data modalities it features. While most of the benchmarks are heavily dominated by 2D image classification tasks, Shifts contains tabular weather forecasting, machine translation, and vehicle motion prediction tasks. This enables the robustness properties of models to be assessed on a diverse set of industrial-scale tasks and either universal or directly applicable task-specific conclusions to be reached. In this paper, we extend the Shifts Dataset with two datasets sourced from industrial, high-risk applications of high societal importance. Specifically, we consider the tasks of segmentation of white matter Multiple Sclerosis lesions in 3D magnetic resonance brain images and the estimation of power consumption in marine cargo vessels. Both tasks feature ubiquitous distributional shifts and a strict safety requirement due to the high cost of errors. These new datasets will allow researchers to further explore robust generalization and uncertainty estimation in new situations. In this work, we provide a description of the dataset and baseline results for both tasks.
- Published
- 2022
31. Short-term cognitive learning outcomes in team-based learning: is the permanent team important?
- Author
-
Stefan Heber, Michaela Wagner-Menghin, Ivo Volf, Marjan Slak Rupnik, Diethart Schmid, Richard Marz, and Michael J.M. Fischer
- Subjects
Team-based learning ,online teaching ,collaborative learning ,group composition ,temporary team ,Special aspects of education ,LC8-6691 ,Medicine (General) ,R5-920 - Abstract
Assigning students to work in permanent teams is a design principle in Team-based learning (TBL). It has been assumed that a stable team composition supports the emergence of collaborative problem-solving and learning: when students became more familiar with each other, they shared more information and resolved discrepancies together, which in turn stimulated knowledge acquisition and comprehension. However, this assumption had not been probed by a randomized controlled trial with performance assessment as an outcome. In an online course for second term medical students, 50% of the students were reassigned to new teams for each of the 24 problems to be solved during four classes, thus precluding familiarity. The learning outcome was assessed shortly after the third of four classes by a domain knowledge test. Whether TBL teams were permanent or temporary did not affect the score of a domain knowledge test. As expected, participation in online TBL improved the domain knowledge test results. Overall, the permanent team seems to be less important for cognitive learning outcomes than previously assumed, but this may depend on the specific educational setting. However, team familiarity may still be important for team decision-making. As clinical reasoning in the medical workplace often involves collaborating in changing teams, future research on TBL should focus on how to utilize this format to prepare medical students for decision-making and optimal learning outcomes under these conditions.
- Published
- 2024
- Full Text
- View/download PDF
32. Daylight quality: high-transmittance glass versus low transmittance glass - effects on daylight quality, health, comfort and energy consumption
- Author
-
Carlo Volf, Paul Michael Petersen, Anders Thorseth, Stefan Vestergaard, and Klaus Martiny
- Subjects
Daylight ,glass quality ,architecture ,chronobiology ,sleep-mental health ,energy consumption ,Medicine - Abstract
AbstractIntroduction: This study investigated the health effects of two different architectural glass types: A two-layered low-iron high transmittance glass and a three-layered low energy glass with lower transmittance. The study investigated how these glass types affected daylight conditions in 72 residential apartments, as well as health and satisfaction of the residents.Methods: The study installed high transmittance glass (light transmittance LT:0.82) in 36 apartments and low transmittance (LT:0.74) in 36 identical apartments. The study then analyzed the light transmittance of each glass type in the laboratory and analyzed the indoor environmental quality (IEQ) in eight representative apartments before and after renovation. Self-reported questionnaires were handed out and collected before and after renovation.Results: The results showed that the glass types differed significantly in measured daylight transmittance. The two-layered high transmittance glass transmitted 15% more visual light (380–750 nm) and 20% more light in the spectral range (460–480 nm), stimulating ipRGCs and circadian rhythm, when compared to three-layered low energy glass. In addition, significant differences were observed in the UV-B spectrum (280–315 nm). While two-layered high transmittance glass transmitted UV-B, three-layered low transmittance glass did not. During the 12-month study period, residents in apartments with three-layered low energy glass reported more difficulties sleeping (p = 0.05), higher satisfaction with daylight (p = 0.03) and higher satisfaction with ventilation (p = 0.04). Residents in apartments with three-layered low energy glass experienced fewer days with too cold indoor temperatures (p = 0.02), compared to residents with two-layered low-iron glass. The results of energy consumption for heating showed that two-layered low-iron glass reduced the energy consumption by 11.0%, while three-layered low energy glass reduced the energy consumption by 9.4%, compared to the year prior to renovation.Conclusion: The results contribute to a discussion about potential energy savings on one hand and potential non-energy benefits, such as daylight quality, overall health, and total economy/life cycle assessment of the built environment on the other hand. The results suggest further research performed in randomized large-scale studies.
- Published
- 2024
- Full Text
- View/download PDF
33. Technological and provenance insights into La Tène pottery
- Author
-
Jan Volf, Karel Slavíček, Richard Thér, and Kristýna Trnová
- Subjects
Late La Tène period ,production of pottery ,socio-economic network ,X-ray fluorescence ,ceramic petrography ,computed tomography ,History of Central Europe ,DAW1001-1051 ,Ancient history ,D51-90 - Abstract
During the Late La Tène period in the first century BC, Central Europe witnessed significant shifts in settlement structures and material culture. Understanding these changes necessitates an examination of LT D1b phase settlements, particularly in Bohemia, where such sites are rare. This study extends beyond conventional stylistic analysis of pottery, incorporating material and manufacturing perspectives to reveal production organisation, distribution, and community interactions. Through a comprehensive examination of the settlement pottery from the feature 27/1986 from Křinec using X-ray fluorescence, thin section analysis, and computed tomography, we have gained a better understanding of the settlement's position in the regional socio-economic network within which ceramic vessels or raw materials were transported over distances of more than 20 km. The presented approach offers a deeper comprehension of the La Tène period's end in Bohemia and underscores the value of multifaceted pottery research in archaeological studies.
- Published
- 2024
- Full Text
- View/download PDF
34. Effect of Phlebotomus papatasi on the fitness,infectivity and antimony-resistance phenotype of antimony-resistant Leishmania major Mon-25
- Author
-
Nalia Mekarnia, Benallal Kamal-Eddine, Jovana Sádlová, Barbora Vojtková, Aurélie Mauras, Nicolas Imbert, Maryline Longhitano, Zoubir Harrat, Petr Volf, Philippe M. Loiseau, and Sandrine Cojean
- Subjects
Leishmania major ,Phlebotomus papatasi, experimental infection ,Fitness ,Virulence ,Antimony resistance ,Infectious and parasitic diseases ,RC109-216 - Abstract
Leishmania major is responsible for zoonotic cutaneous leishmaniasis. Therapy is mainly based on the use of antimony-based drugs; however, treatment failures and illness relapses were reported. Although studies were developed to understand mechanisms of drug resistance, the interactions of resistant parasites with their reservoir hosts and vectors remain poorly understood. Here we compared the development of two L. major MON-25 trivalent antimony-resistant lines, selected by a stepwise in vitro Sb(III)-drug pressure, to their wild-type parent line in the natural vector Phlebotomus papatasi. The intensity of infection, parasite location and morphological forms were compared by microscopy. Parasite growth curves and IC50 values have been determined before and after the passage in Ph. papatasi. qPCR was used to assess the amplification rates of some antimony-resistance gene markers. In the digestive tract of sand flies, Sb(III)-resistant lines developed similar infection rates as the wild-type lines during the early-stage infections, but significant differences were observed during the late-stage of the infections. Thus, on day 7 p. i., resistant lines showed lower representation of heavy infections with colonization of the stomodeal valve and lower percentage of metacyclic promastigote forms in comparison to wild-type strains. Observed differences between both resistant lines suggest that the level of Sb(III)-resistance negatively correlates with the quality of the development in the vector. Nevertheless, both resistant lines developed mature infections with the presence of infective metacyclic forms in almost half of infected sandflies. The passage of parasites through the sand fly guts does not significantly influence their capacity to multiply in vitro. The IC50 values and molecular analysis of antimony-resistance genes showed that the resistant phenotype of Sb(III)-resistant parasites is maintained after passage through the sand fly. Sb(III)-resistant lines of L. major MON-25 were able to produce mature infections in Ph. papatasi suggesting a possible circulation in the field using this vector.
- Published
- 2024
- Full Text
- View/download PDF
35. ParSCo: celebrating 10 years of a unique parasitology summer course
- Author
-
Filipe Dantas-Torres, Marcos Antonio Bezerra-Santos, Jairo Alfonso Mendoza-Roldan, Riccardo Paolo Lia, Livia Perles, Juan Pedro Barrera, Renata Fagundes-Moreira, Mariaelisa Carbonara, Antonio Varcasia, Emanuele Brianti, Georgiana Deak, Alicia Rojas, Guadalupe Miró, Petr Volf, Gad Baneth, and Domenico Otranto
- Subjects
Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract ParSCo (Parasitology Summer Course) is an intense, 1-week-long summer course organized by the Parasitology Unit of the Department of Veterinary Medicine, University of Bari, Italy, with the support of the World Association for the Advancement of Veterinary Parasitology (WAAVP), the European Veterinary Parasitology College (EVPC) and Parasites and Vectors. The course, which is conducted in southern Italy, is planned for parasitologists and post-graduate students working in the field of parasitology. The course consists of theoretical and practical lessons, which include the collection, identification and diagnosis of parasites of pets, livestock and wildlife. The participants in ParSCo are afforded the opportunity to be involved in clinical examination and sample collection for the diagnosis of parasitic diseases (e.g. leishmaniosis, thelaziosis and many tick-borne diseases) present in the Mediterranean Basin. The course is conducted at Casa di Caccia, a hunting lodge situated in the Gallipoli Cognato Forest near the Basento River in the Basilicata region in southern Italy. In addition to the training purpose, ParSCo is a great opportunity for sharing knowledge and expertise while becoming part of the parasitology community in a pleasant environment. In this editorial, we share some information and celebrate 10 years of ParSCo, looking forward to forthcoming sessions of this unique parasitology summer course. Graphical Abstract
- Published
- 2024
- Full Text
- View/download PDF
36. A sustainable bio-based char as emerging electrode material for energy storage applications
- Author
-
Gabriela Hristea, Mihai Iordoc, Eduard-Marius Lungulescu, Iuliana Bejenari, and Irina Volf
- Subjects
Medicine ,Science - Abstract
Abstract In the last few years, extensive research efforts have been made to develop novel bio-char-based electrodes using different strategies starting from a variety of biomass precursors as well as applying different thermochemical conversion paths. In this regard, hydrothermal carbonization method is becoming a more prevalent option among conversion procedures even if pyrolysis remains crucial in converting biomass into carbonaceous materials. The main aim of this study is to develop an innovative supercapacitor electrode from spruce bark waste through a unique low-temperature technique approach, which proved to effectively eliminate the pyrolysis step. Consequently, a hybrid spruce-bark-graphene oxide compound (HySB) was obtained as electrode material for supercapacitors. When compared to a regularly used commercial electrode material, SLC1512P graphite (reference) with 150.3 µF cm−2 capacitance, the HySB has a substantially higher capacitive performance of 530.5 µF cm−2. In contrast to the reference, the HySB polarization resistance increases by two orders of magnitude at the stationary potential and by three orders of magnitude at the optimum potential, underlying that the superior performances of HySB extend beyond static conditions. The synthesis strategy provides an appropriate energy-efficient option for converting biomass into carbonaceous materials with meaningful properties suitable for energy storage applications.
- Published
- 2024
- Full Text
- View/download PDF
37. EMID2 is a novel biotherapeutic for aggressive cancers identified by in vivo screening
- Author
-
Ambra Cappelletto, Edoardo Alfì, Nina Volf, Thi Van Anh Vu, Francesca Bortolotti, Giulio Ciucci, Simone Vodret, Marco Fantuz, Martina Perin, Andrea Colliva, Giacomo Rozzi, Matilde Rossi, Giulia Ruozi, Lorena Zentilin, Roman Vuerich, Daniele Borin, Romano Lapasin, Silvano Piazza, Mattia Chiesa, Daniela Lorizio, Luca Triboli, Sandeep Kumar, Gaia Morello, Claudio Tripodo, Maurizio Pinamonti, Giulia Maria Piperno, Federica Benvenuti, Alessandra Rustighi, Hanjoong Jo, Stefano Piccolo, Giannino Del Sal, Alessandro Carrer, Mauro Giacca, and Serena Zacchigna
- Subjects
In vivo screening ,Cancer ,Cell invasiveness ,AAV vectors ,Gene therapy ,Biotherapeutics ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background New drugs to tackle the next pathway or mutation fueling cancer are constantly proposed, but 97% of them are doomed to fail in clinical trials, largely because they are identified by cellular or in silico screens that cannot predict their in vivo effect. Methods We screened an Adeno-Associated Vector secretome library (> 1000 clones) directly in vivo in a mouse model of cancer and validated the therapeutic effect of the first hit, EMID2, in both orthotopic and genetic models of lung and pancreatic cancer. Results EMID2 overexpression inhibited both tumor growth and metastatic dissemination, consistent with prolonged survival of patients with high levels of EMID2 expression in the most aggressive human cancers. Mechanistically, EMID2 inhibited TGFβ maturation and activation of cancer-associated fibroblasts, resulting in more elastic ECM and reduced levels of YAP in the nuclei of cancer cells. Conclusion This is the first in vivo screening, precisely designed to identify proteins able to interfere with cancer cell invasiveness. EMID2 was selected as the most potent protein, in line with the emerging relevance of the tumor extracellular matrix in controlling cancer cell invasiveness and dissemination, which kills most of cancer patients.
- Published
- 2024
- Full Text
- View/download PDF
38. Background EEG Activity Mediates the Association between the BDNF Val66Met Polymorphism and Memory during Aging
- Author
-
Volf, N. V. and Privodnova, E. Yu.
- Published
- 2023
- Full Text
- View/download PDF
39. Evolution of RNA viruses in trypanosomatids: new insights from the analysis of Sauroleishmania
- Author
-
Klocek, Donnamae, Grybchuk, Danyil, Tichá, Lucie, Votýpka, Jan, Volf, Petr, Kostygov, Alexei Yu., and Yurchenko, Vyacheslav
- Published
- 2023
- Full Text
- View/download PDF
40. Species identification of phlebotomine sandflies using deep learning and wing interferential pattern (WIP)
- Author
-
Arnaud Cannet, Camille Simon-Chane, Aymeric Histace, Mohammad Akhoundi, Olivier Romain, Marc Souchaud, Pierre Jacob, Darian Sereno, Petr Volf, Vit Dvorak, and Denis Sereno
- Subjects
Medicine ,Science - Abstract
Abstract Sandflies (Diptera; Psychodidae) are medical and veterinary vectors that transmit diverse parasitic, viral, and bacterial pathogens. Their identification has always been challenging, particularly at the specific and sub-specific levels, because it relies on examining minute and mostly internal structures. Here, to circumvent such limitations, we have evaluated the accuracy and reliability of Wing Interferential Patterns (WIPs) generated on the surface of sandfly wings in conjunction with deep learning (DL) procedures to assign specimens at various taxonomic levels. Our dataset proves that the method can accurately identify sandflies over other dipteran insects at the family, genus, subgenus, and species level with an accuracy higher than 77.0%, regardless of the taxonomic level challenged. This approach does not require inspection of internal organs to address identification, does not rely on identification keys, and can be implemented under field or near-field conditions, showing promise for sandfly pro-active and passive entomological surveys in an era of scarcity in medical entomologists.
- Published
- 2023
- Full Text
- View/download PDF
41. Reconstructing the post-glacial spread of the sand fly Phlebotomus mascittii Grassi, 1908 (Diptera: Psychodidae) in Europe
- Author
-
Edwin Kniha, Vít Dvořák, Stephan Koblmüller, Jorian Prudhomme, Vladimir Ivović, Ina Hoxha, Sandra Oerther, Anna Heitmann, Renke Lühken, Anne-Laure Bañuls, Denis Sereno, Alice Michelutti, Federica Toniolo, Pedro M. Alarcón-Elbal, Daniel Bravo-Barriga, Mikel A. González, Javier Lucientes, Vito Colella, Domenico Otranto, Marcos Antônio Bezerra-Santos, Gernot Kunz, Adelheid G. Obwaller, Jerome Depaquit, Amer Alić, Ozge Erisoz Kasap, Bulent Alten, Jasmin Omeragic, Petr Volf, Julia Walochnik, Viktor Sebestyén, and Attila J. Trájer
- Subjects
Biology (General) ,QH301-705.5 - Abstract
Abstract Phlebotomine sand flies (Diptera: Phlebotominae) are the principal vectors of Leishmania spp. (Kinetoplastida: Trypanosomatidae). In Central Europe, Phlebotomus mascittii is the predominant species, but largely understudied. To better understand factors driving its current distribution, we infer patterns of genetic diversity by testing for signals of population expansion based on two mitochondrial genes and model current and past climate and habitat suitability for seven post-glacial maximum periods, taking 19 climatic variables into account. Consequently, we elucidate their connections by environmental-geographical network analysis. Most analyzed populations share a main haplotype tracing back to a single glacial maximum refuge area on the Mediterranean coasts of South France, which is supported by network analysis. The rapid range expansion of Ph. mascittii likely started in the early mid-Holocene epoch until today and its spread possibly followed two routes. The first one was through northern France to Germany and then Belgium, and the second across the Ligurian coast through present-day Slovenia to Austria, toward the northern Balkans. Here we present a combined approach to reveal glacial refugia and post-glacial spread of Ph. mascittii and observed discrepancies between the modelled and the current known distribution might reveal yet overlooked populations and potential further spread.
- Published
- 2023
- Full Text
- View/download PDF
42. A photonic platform hosting telecom photon emitters in silicon
- Author
-
Hollenbach, Michael, Jagtap, Nagesh S., Fowley, Ciarán, Baratech, Juan, Guardia-Arce, Verónica, Kentsch, Ulrich, Eichler-Volf, Anna, Abrosimov, Nikolay V., Erbe, Artur, Shin, ChaeHo, Kim, Hakseong, Helm, Manfred, Lee, Woo, Astakhov, Georgy V., and Berencén, Yonder
- Subjects
Physics - Optics ,Condensed Matter - Materials Science - Abstract
Silicon, a ubiquitous material in modern computing, is an emerging platform for realizing a source of indistinguishable single-photons on demand. The integration of recently discovered single-photon emitters in silicon into photonic structures, is advantageous to exploit their full potential for integrated photonic quantum technologies. Here, we show the integration of telecom photon emitters in a photonic platform consisting of silicon nanopillars. We developed a CMOS-compatible nanofabrication method, enabling the production of thousands of individual nanopillars per square millimeter with state-of-the-art photonic-circuit pitch, all the while being free of fabrication-related radiation damage defects. We found a waveguiding effect of the 1278 nm-G center emission along individual pillars accompanied by improved brightness, photoluminescence signal-to-noise ratio and photon extraction efficiency compared to that of bulk silicon. These results unlock clear pathways to monolithically integrating single-photon emitters into a photonic platform at a scale that matches the required pitch of quantum photonic circuits., Comment: 6 pages, 4 figures
- Published
- 2021
43. Stabilization of Picea abies Spruce Bark Extracts within Ice-Templated Porous Dextran Hydrogels
- Author
-
Roxana Petronela Damaschin, Maria Marinela Lazar, Claudiu-Augustin Ghiorghita, Ana Clara Aprotosoaie, Irina Volf, and Maria Valentina Dinu
- Subjects
antimicrobial ,antioxidant ,dextran ,morphology ,porous hydrogels ,spruce bark extracts ,Organic chemistry ,QD241-441 - Abstract
Porous hydrogels have brought more advantages than conventional hydrogels when used as chromatographic materials, controlled release vehicles for drugs and proteins, matrices for immobilization or separation of molecules and cells, or as scaffolds in tissue engineering. Polysaccharide-based porous hydrogels, in particular, can address challenges related to bioavailability, solubility, stability, and targeted delivery of natural antioxidant compounds. Their porous structure enables the facile encapsulation and controlled release of these compounds, enhancing their therapeutic effectiveness. In this context, in the present study, the cryogelation technique has been adopted to prepare novel dextran (Dx)-based porous hydrogels embedding polyphenol-rich natural extract from Picea abies spruce bark (SBE). The entrapment of the SBE within the Dx network was proved by FTIR, SEM, and energy-dispersive X-ray spectroscopy (EDX). SEM analysis showed that entrapment of SBE resulted in denser cryogels with smaller and more uniform pores. Swelling kinetics confirmed that higher concentrations of Dx, EGDGE, and SBE reduced water uptake. The release studies demonstrated the effective stabilization of SBE in the Dx-based cryogels, with minimal release irrespective of the approach selected for SBE incorporation, i.e., during synthesis (~3–4%) or post-synthesis (~15–16%). In addition, the encapsulation of SBE within the Dx network endowed the hydrogels with remarkable antioxidant and antimicrobial properties. These porous biomaterials could have broad applications in areas such as biomedical engineering, food preservation, and environmental protection, where stability, efficacy, and safety are paramount.
- Published
- 2024
- Full Text
- View/download PDF
44. Reconstructing the post-glacial spread of the sand fly Phlebotomus mascittii Grassi, 1908 (Diptera: Psychodidae) in Europe
- Author
-
Kniha, Edwin, Dvořák, Vít, Koblmüller, Stephan, Prudhomme, Jorian, Ivović, Vladimir, Hoxha, Ina, Oerther, Sandra, Heitmann, Anna, Lühken, Renke, Bañuls, Anne-Laure, Sereno, Denis, Michelutti, Alice, Toniolo, Federica, Alarcón-Elbal, Pedro M., Bravo-Barriga, Daniel, González, Mikel A., Lucientes, Javier, Colella, Vito, Otranto, Domenico, Bezerra-Santos, Marcos Antônio, Kunz, Gernot, Obwaller, Adelheid G., Depaquit, Jerome, Alić, Amer, Kasap, Ozge Erisoz, Alten, Bulent, Omeragic, Jasmin, Volf, Petr, Walochnik, Julia, Sebestyén, Viktor, and Trájer, Attila J.
- Published
- 2023
- Full Text
- View/download PDF
45. Species identification of phlebotomine sandflies using deep learning and wing interferential pattern (WIP)
- Author
-
Cannet, Arnaud, Simon-Chane, Camille, Histace, Aymeric, Akhoundi, Mohammad, Romain, Olivier, Souchaud, Marc, Jacob, Pierre, Sereno, Darian, Volf, Petr, Dvorak, Vit, and Sereno, Denis
- Published
- 2023
- Full Text
- View/download PDF
46. Assessing the implementation of physical activity-promoting public policies in the Republic of Ireland: a study using the Physical Activity Environment Policy Index (PA-EPI)
- Author
-
Volf, Kevin, Kelly, Liam, Van Hoye, Aurelie, García Bengoechea, Enrique, MacPhail, Ann, and Woods, Catherine B.
- Published
- 2023
- Full Text
- View/download PDF
47. Experimental feeding of Sergentomyiaminuta on reptiles and mammals: comparison with Phlebotomuspapatasi
- Author
-
Ticha, Lucie, Volfova, Vera, Mendoza-Roldan, Jairo Alfonso, Bezerra-Santos, Marcos Antonio, Maia, Carla, Sadlova, Jovana, Otranto, Domenico, and Volf, Petr
- Published
- 2023
- Full Text
- View/download PDF
48. The effect of drought‐induced leaf traits on Ficus leaf palatability is species specific
- Author
-
Xue Xiao, Leonardo Ré Jorge, Martin Volf, Martin Moos, Uriel Gélin, Sam Finnie, Inga Freiberga, Jitka Jancuchova‐Laskova, Matthias Weiss, Vojtech Novotny, and Katerina Sam
- Subjects
drought duration ,drought intensity ,feeding experiment ,greenhouse ,plant drought tolerance ,plant–insect interaction ,Ecology ,QH540-549.5 - Abstract
Abstract Drought has a significant impact on plant–insect interactions by altering plant survival, growth, leaf quality, and defense traits. Tropical plants are particularly vulnerable to water depression because of shallow root depth. In the context of climate change, drought events are expected to increase in frequency and intensity; however, their impact on tropical ecosystems remains poorly known. Insect herbivores represent the largest feeding guild of arthropods, and they devour four to five times more plant material than vertebrates do. Understanding how drought affects plant traits and leaf palatability in a keystone and ecologically diverse plant genus, such as Ficus (Moraceae), is crucial for predicting how climate change might alter tropical plant–insect interactions. We examined the impact of drought intensity and duration on the leaf nutritional quality, defensive traits, and herbivory damage by caterpillars in three tropical and one Mediterranean Ficus species in a greenhouse. We also conducted food choice trials with generalist caterpillars to evaluate the impact of drought on herbivores. Drought intensity and duration had no direct effect on leaf palatability across the Ficus species. However, drought indirectly affected leaf palatability via drought‐induced leaf traits in a species‐specific manner. Drought intensity and duration decreased leaf water content, resulting in decreased leaf palatability in F. benjamina and F. lyrata. Leaf defensive traits such as flavonoid concentration were affected by drought intensity and decreased leaf palatability in F. carica. Drought influenced the leaf traits of F. elastica, but none of them affected leaf palatability. Overall, this study establishes the link between drought and insect feeding on plants via leaf traits. The species‐specific responses to drought highlight the significance of climate‐related plant life histories in relation to climate change, underscoring the need for further investigations.
- Published
- 2024
- Full Text
- View/download PDF
49. Steppe lemmings and Chinese hamsters as new potential animal models for the study of the Leishmania subgenus Mundinia (Kinetoplastida: Trypanosomatidae)
- Author
-
Tomas Becvar, Barbora Vojtkova, Lenka Pacakova, Barbora Vomackova Kykalova, Lucie Ticha, Petr Volf, and Jovana Sadlova
- Subjects
Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Published
- 2024
50. Indoor environmental quality in schools: NOTECH solution vs. standard solution [version 3; peer review: 2 approved, 2 not approved]
- Author
-
Bodil Engberg Pallesen, Mathias Andersen, Carlo Volf, and Klaus Martiny
- Subjects
Natural ventilation – indoor environmental quality (IEQ) – schools – mechanical ventilation – energy performance ,eng ,Medicine ,Science - Abstract
Background In many Danish schools, the indoor environmental quality (IEQ) is challenged and studies document a poor IEQ in a majority of existing schools. Municipalities cannot afford comprehensive renovations and expensive mechanical ventilation solutions, hence public schools often suffer from poor indoor environment conditions. This study tests a new façade based, demand-controlled ventilation solution called NOTECH in the renovation of school. The study tests NOTECH vs. existing mechanical ventilation solution, comparing performance of both solutions at Skovbrynet Skole in Denmark. Methods The project investigates the effect of the NOTECH solution in a primary school classroom, comparing it to a similar classroom with conventional, mechanical ventilation. Methodically, indoor environmental quality and energy performance is monitored in the two identical classrooms during one school year 2018 - 2019. Results The results show that both systems keep the conditions within acceptable limits and CO2 levels below 1000 ppm, which is the requirement according to the Danish Building Regulations. In terms of costs, the NOTECH system has a lower overall cost than the mechanical ventilation system, with total estimated costs for installation, heating, electricity and maintenance amounting to approximately 35% of the mechanical system’s costs. Finally, the results show that the NOTECH solution has a smaller embedded CO2 footprint for building materials, reducing the estimated carbon load by 95% compared to the mechanical ventilation solution. Conclusions While the performance of the both systems complies to the Danish Building Regulations, the indoor environmental quality between systems differs significantly. Results showing a higher air-temperature and lower relative air-humidity in the classroom with mechanical ventilation during winter and lower CO2 levels in the mechanically ventilated classroom during winter and summer. Costs for implementation, energy consumption for heating and CO2 footprint for building materials are significantly lower for the NOTECH solution, compared to the mechanical solution.
- Published
- 2024
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.