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Study innovates in gluten-free formulations, creating more palatable and nutritious bread
Publicado em 20 de julho de 2021
A pregnant woman infected by Zika virus does not face a greater risk of giving birth to a baby with microcephaly if she has previously been exposed to dengue virus, according to a Brazilian study that compared data for pregnant women in Rio de Janeiro and Manaus.
A Zika epidemic broke out in Brazil in 2015-16 in areas where dengue is endemic. Both viruses are transmitted by the mosquito Aedes aegypti. Some of the states affected by the Zika epidemic reported a rise in cases of microcephaly, a [...]
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Study assesses the prevalence of psychiatric symptoms before and during the COVID-19 pandemic
Publicado em 13 julho 2021The COVID-19 pandemic and the situations of stress and sadness associated with it have not significantly increased the prevalence of depression and anxiety among participants in the Brazilian Longitudinal Study of Adult Health (ELSA-Brazil) who live in the city of São Paulo. ELSA-Brazil has been monitoring the overall health of 15,000 civil servants at six public universities and research centers in Brazil since 2008. The survey on mental health during the pandemic was conducted in [...]ver notícia -
Quantum phase transition discovered in a quasi-2D system consisting purely of spins
Publicado em 12 julho 2021Pure quantum systems can undergo phase transitions analogous to the classical phase transition between the liquid and gaseous states of water. At the quantum level, however, the particle spins in states that emerge from phase transitions display collective entangled behavior. This unexpected observation offers a new avenue for the production of materials with topological properties that are useful in spintronics applications and quantum computing. The discovery was made by an international [...]ver notícia -
Newborns to three months should be stimulated to hold and reach for objects, study says
Publicado em 10 julho 2021Newborn infants and babies aged up to three months should be stimulated to manipulate objects and observe adults performing everyday tasks. This incentive helps their social, motor and cognitive development, researchers note in an article published in the May 2021 issue of the journal Infant Behavior & Development. According to the authors, from the earliest age babies watch adults carrying out activities such as handling utensils and putting them away in drawers or closets. [...]ver notícia -
A 50% rise in the level of CO2 could reduce rainfall in the Amazon more than deforestation
Publicado em 01 julho 2021A 50% rise in the level of carbon dioxide (CO2) in the atmosphere could reduce rainfall in the Amazon as much as or even more than substitution of the entire forest by pasture. The rise in CO2 would reduce the amount of water vapor emitted by the forest, leading to a 12% annual drop in the volume of rainfall, while total deforestation would reduce rainfall by 9%. These estimates are presented in a study published in Biogeosciences by scientists affiliated with the National Space Research [...]ver notícia -
Concepts from physics explain importance of quarantine to control spread of COVID-19
Publicado em 24 junho 2021Mathematical models that describe the physical behavior of magnetic materials can also be used to describe the spread of the novel coronavirus that causes COVID-19. This is the conclusion of a study conducted in Brazil by researchers affiliated with São Paulo State University (UNESP) in Rio Claro and Ilha Solteira and reported in an article published in Physica A: Statistical Mechanics and its Applications. The study was part of a project led by Mariano de Souza, a professor at [...]ver notícia -
Marine sediments explain how part of Brazil’s Northeast region became semi-arid
Publicado em 22 junho 2021Rainfall associated with the Intertropical Convergence Zone (ITCZ), the belt of converging trade winds and rising air that encircles the Earth near the Equator, affects the food and water security of approximately 1 billion people worldwide. They include about 11% of the Brazilian population, concentrated in four states of the Northeast region—Rio Grande do Norte, Ceará, Piauí, and Maranhão. Large swaths of these states have a semi-arid climate, and about half of all [...]ver notícia -
Poaching affects behavior of endangered capuchin monkeys in Brazilian biological reserve
Publicado em 21 junho 2021A study conducted in the Una Biological Reserve in the state of Bahia, Brazil, shows that in a habitat with high hunting pressure the risk of predation has such a significant impact on the behavior of the Yellow-breasted capuchin monkey Sapajus xanthosternos that it even avoids areas offering an abundant supply of plant biomass and invertebrates, its main sources of food. “Many theories in the field of primatology assume that pressure to find food is more important that [...]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 -
Researchers identify the causes of the extreme drought that affected the Pantanal
Publicado em 24 maio 2021The extreme drought suffered by the Pantanal in 2019-20, considered the worst in the last 50 years, was caused by natural climate conditions similar to those underlying the 2014-16 water crisis in São Paulo state. The Pantanal is one of the world’s largest wetlands. The Brazilian portion is located in the Center-West region, mainly Mato Grosso do Sul state. The 2019-20 extreme drought was studied by researchers affiliated with the Natural Disaster Surveillance and Early Warning [...]ver notícia