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Study helps understand why obesity increases risk of cardiovascular complications in COVID-19
Publicado em 13 de novembro de 2021
In COVID-19 patients, obesity is the factor most associated with the development of endothelial dysfunction, a condition in which the blood vessels become unable to contract and relax adequately, increasing the risk of events such as heart attacks, thrombosis (blood clotting), and stroke.
Endothelium refers to the thin sheet of cells lining the walls of arteries and veins, as well as the inside of the heart. Endothelial cells release substances that control vascular relaxation and contraction, [...]
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Highly abundant virus in humans could be a biomarker for COVID-19
Publicado em 05 novembro 2021Torquetenovirus (TTV) is one of the viruses most frequently found in the human organism. It is also common in monkeys and domestic animals. Its presence has not been associated with any known disease, but its excessive replication is a sign that something is wrong with the immune system. The correlation between high TTV load and immunosuppression has been used in medicine in certain contexts, such as monitoring transplant patients who take medication to prevent rejection of the transplanted [...]ver notícia -
Study reveals drastic decline of aquatic insect population in Paraná River basin
Publicado em 30 setembro 2021Research conducted in Brazil for more than 20 years in the Paraná River basin shows a drastic fall in the number of aquatic insects in the region, which is considered well-preserved and distant from the negative impacts of agriculture, cattle breeding, and urbanization. The fieldwork was done by researchers affiliated with the State University of Maringá’s Center for Research in Limnology, Ichthyology and Aquaculture (NUPELIA-UEM). The data was systematized byGustavo [...]ver notícia -
Electoral cycles influence destruction of Atlantic rainforest areas in southern and southeastern Brazil
Publicado em 22 setembro 2021A study conducted at the University of São Paulo (USP) in Brazil, and reported in an article published in the journal Conservation Letters, shows that destruction of the Atlantic Rainforest increases in election years. The researchers correlated data from the Electoral High Court (TSE) and MapBiomas, the Brazilian Annual Land Use and Land Cover Mapping Project, for 2,253 municipalities in the southern and southeastern regions covering the period 1991-2014. They found [...]ver notícia -
First Genetic Sequencing of Brazilian Pit Viper Completed – Reveals Origin of Toxins in Its Venom
Publicado em 16 agosto 2021In an article published in PNAS, researchers affiliated with Butantan Institute describe the genome of Bothrops jararaca and suggest the origin of genes responsible for toxins in its venom. A group led by researchers at Butantan Institute and funded by São Paulo Research Foundation — FAPESP has completed the first sequencing of a Brazilian snake’s genome. The study is reported in an article published in the journal PNAS. It suggests that the nine genes that encode [...]ver notícia -
Tree falls during dry season in São Paulo City are due to poor management, study suggests
Publicado em 12 agosto 2021By Luciana Constantino | Agência FAPESP–Trees fall every day in São Paulo, Brazil, the largest and most populous city in Latin America, but most tree falls occur in the rainy season owing mainly to the effects of temperature, strong winds and heavy rain. When trees fall in the dry season, the main direct cause is not weather but a lack of management and adequate conditions for the survival of street vegetation. These are the key findings of a studypublishedby a group of [...]ver notícia -
Birds that disperse more types of seed have better evolutionary chances
Publicado em 11 agosto 2021More than 70% of plant species that produce flowers depend on birds to disperse their seeds. Birds feed on fruit from a wide array of different plants, and bird-plant interactions configure a welter of complex networks. A study conducted at the University of São Paulo’s Institute of Biosciences (IB-USP) in Brazil shows that the evolutionary stability of each bird species depends on the position it occupies in these networks, increasing in step with the number and centrality of its [...]ver notícia -
2/3 of Calories in Children and Teen Diets Comes From Ultraprocessed Foods
Publicado em 10 agosto 2021New study in JAMA also found kids and teens eat less unprocessed and minimally processed foods. The calories that children and adolescents consumed from ultraprocessed foods jumped from 61% to 67% of total caloric intake from 1999 to 2018, according to a new study from researchers at the Friedman School of Nutrition Science & Policy at Tufts University. Published August 10, 2021, in JAMA, the study analyzed dietary intake from 33,795 children and adolescents [...]ver notícia -
Researchers propose a method of magnetizing a material without applying an external magnetic field
Publicado em 29 julho 2021Magnetizing a material without applying an external magnetic field is proposed by researchers at São Paulo State University (UNESP), Brazil, in an article published in the journal Scientific Reports, where they detail the experimental approach used to achieve this goal. The study was part of the Ph.D. research pursued by Lucas Squillante under the supervision of Mariano de Souza, a professor at UNESP’s Department of Physics in Rio Claro. Contributions were also made by Isys Mello, [...]ver notícia -
Microorganisms Discovered on the Rio Grande Rise Are a Basis for Life and a Possible Origin of Metals
Publicado em 26 maio 2021Researchers conducted the first large-scale survey of the microbiota present in the seamount’s ferromanganese crusts, describing bacteria and archaea involved in the nutrient cycle and formation of metals. The abundant biological and mineral diversity of the Rio Grande Rise, a seamount in the depths of the Atlantic Ocean about 1,500 km from the coast of Brazil, is probably due to a great extent to little-known microscopic creatures. Researchers affiliated with the University of [...]ver notícia