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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 study published by a group of Brazilian researchers in the journal [...]

More 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 [...]

New examine in JAMA additionally discovered children and teenagers eat much less unprocessed and minimally processed meals. The energy that kids and adolescents consumed from ultraprocessed meals jumped from 61% to 67% of complete caloric consumption from 1999 to 2018, in line with a brand new examine from researchers on the Friedman College of Vitamin Science & Coverage at Tufts College. Printed August 10, 2021, in JAMA, the examine analyzed dietary consumption from 33,795 kids and [...]

The challenges posed by the COVID-19 pandemic have stimulated innovation on several fronts. One is the development of low-cost methods of clinical diagnosis. Genosensors are a case in point. Based on nucleic acids that detect simple complementary DNA or RNA sequences, genosensors are biosensors that make possible mass testing for immediate and sensitive testing of genetic material. A device of this kind, already shown to be efficient in detecting SARS-CoV-2, has just been produced in Brazil by [...]

Researchers propose a method of magnetizing a material without applying an external magnetic field. The study shows that the phenomenon can be produced by means of adiabatic compression, without any exchange of heat with the environment. The process aligns the spins of the material’s particles and magnetizes the system. Magnetizing a material without applying an external magnetic field is proposed by researchers at São Paulo State University (UNESP), Brazil, in an article [...]

Magnetizing 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, [...]

Researchers at the University of São Paulo (USP) in Brazil investigated the effects of regular exercise on the physical and mental health of 344 volunteers during the pandemic. The study compared the effectiveness of three techniques: sessions led in person by a fitness instructor, sessions featuring an online instructor but no supervision, and sessions supervised remotely by an instructor via video call. The two kinds of session with professional supervision had the strongest effects [...]

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 [...]

The 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 [...]