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In an article published in the journal PLOS ONE, Brazilian scientists show that one of the effects of overfishing in Arraial do Cabo, Rio de Janeiro state, Brazil, is the replacement of large and valuable species with smaller ones for which there was previously little demand. According to the authors, the decline in stocks of Pomatomus saltatrix (bluefish), Epinephelus marginatus (brown grouper), Caranx hippos (crevalle jack) and Seriola fasciata (amberjack) was followed by an increase in the [...]

Research from the Center for the Study of the Human Genome and Stem Cells, the University of São Paulo’s Institute of Biology (IB-USP), suggests that men could be the main transmitters of the novel coronavirus in relation to women. The results of the work were published on the medRxiv platform, in an article without peer review. In the peer-review process, reviewers may suggest that the work be rejected, published as-is, or sent back to scientists for further [...]

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

Over 70% of plant species that produce flowers depend on birds to disperse their seeds. Birds feed on fruit from a wide range of different plants, and bird-plant interactions form a myriad of complex networks. A study conducted at the Institute of Biosciences of the University of Sao Paulo (IB-USP) in Brazil shows that the evolutionary stability of each bird species depends on the position it occupies in these networks, increasing with the number and centrality of its interactions with [...]

A variante Gamma, inicialmente chamada de P1 e originária do Brasil, é mais agressiva. Essa é a conclusão do estudo desenvolvido em São José do Rio Preto, interior de São Paulo, por meio de sequenciamento genético e análises epidemiológicas. A mesma pesquisa também mostra que confinamento e a vacinação são eficazes em conter a mutação do vírus covid-19. O trabalho envolveu a [...]

Ao correlacionar dados de sequenciamento genômico e análises epidemiológicas na cidade de São José do Rio Preto (SP), os pesquisadores conseguiram demonstrar o impacto da prevalência da variante P.1 (hoje denominada Gama) na alta de casos e de óbitos do COVID-19. O aumento da transmissibilidade dessa cepa esteve associado a um aumento significativo de casos graves (127%) e óbitos (162%) nos meses de março e abril de 2021, no [...]

Mattel, el creador de la muñeca Barbie, ha creado seis muñecas en honor a mujeres en ciencia, tecnología, ingeniería y matemáticas de diferentes partes del mundo. Uno de ellos es el investigador que lideró la creación de la vacuna Oxford-AstraZeneca, Profesora Sarah Gilbert. Aunque la científica dijo que encontró la creación “muy extraña” al principio, esperaba que inspirara a los [...]

RIO – Não é novidade que o vinho tinto é apontado pela ciência como protetor da saúde do coração. A maior fonte de benefícios vem de um composto que aparece abundantemente na natureza, os polifenóis. Nas plantas, desempenha o papel de proteção contra o sol, insetos e microrganismos. No corpo humano, atua principalmente no combate aos radicais livres, as moléculas que causam o envelhecimento. Entrevista: [...]

RIO – It is not new that red wine is indicated by science as a protector of heart health. The greatest source of benefits comes from a compound that appears abundantly in nature, polyphenols. In plants it plays the role of protection against the sun, insects and microorganisms. In the human body, it works primarily to fight free radicals, the molecules that cause aging. Interview: “It is a privilege to wake up to life, to understand that destiny is pure destiny”, says a [...]