Publications by authors named "M S Vianna"
Climate change significantly challenges smallholder mixed crop-livestock (MCL) systems in sub-Saharan Africa (SSA), affecting food and feed production. This study enhances the SIMPLACE modeling framework by incorporating crop-vegetation-livestock models, which contribute to the development of sustainable agricultural practices in response to climate change. Applying such a framework in a domain in West Africa (786,500 km) allowed us to estimate the changes in crop (Maize, Millet, and Sorghum) yield, grass biomass, livestock numbers, and greenhouse gas emission in response to future climate scenarios.
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- Musca domestica L., commonly known as the housefly, is a widespread pest that leads to economic losses and spreads various diseases.
- Researchers are exploring the use of entomopathogenic fungi as a natural alternative to chemical insecticides for pest control.
- The study identified three strains of Beauveria bassiana isolated from infected houseflies, demonstrating their adaptability to local environments and potential as effective biological control agents.
Anthropogenic activities have increasingly contaminated aquatic ecosystems worldwide, requiring the development of adequate methods to assess the effects of environmental pollution on aquatic biota. Currently, ecotoxicological research on fish is largely based on in vivo studies, many times using post-mortem fish samples bought in fish markets or obtained through capture-and-release programs. However, such samples provide a narrow window to the cellular and molecular processes that occur to fish upon exposure to pollutants and other toxicants or pathogens.
View Article and Find Full Text PDFSharks, are highly vulnerable to fishing pressures, a key factor in their global population decline. Chemical pollution, however, especially metal and metalloid contamination, poses significant additional risks. Of around 520 shark species, about 170 are threatened, including the Sphyrna genus (hammerheads).
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- Acmella oleracea, traditionally used in Amazonian medicine for various ailments, contains bioactive compounds that could have therapeutic potentials, but scientific research on its wound healing properties is limited.
- The study aimed to analyze the phytochemical composition of methanolic extracts of A. oleracea leaves and to evaluate their antioxidant, anti-inflammatory, antimicrobial, and wound healing activities.
- Results showed the presence of key compounds like vanillic acid and quercetin in the extract, which exhibited strong anti-inflammatory effects and cytocompatibility without inducing toxicity in tested cells, highlighting its potential for wound healing applications.