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Em 2026: 104 notícias
Desde 1995: 365 notícias
Glitter Has a Dark Side, And It's Causing Even More Harm Than We Realized
Publicado em 03 de março de 2024
All that glitters is not gold. Actual glitter, for instance, can be a surprisingly harmful environmental pollutant, as a new study demonstrates.
Despite its association with fun and frivolity, glitter has a dark side. Flecks of glitter reduce the amount of sunlight that penetrates into bodies of water, the new study shows, potentially impairing the ability of some aquatic plants to photosynthesize.
Glitter is essentially a microplastic in disguise, whose whimsical nature distracts from [...]
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Como voluntários combatem invasão biológica em Florianópolis
Publicado em 01 março 2024Cortando pínus com uma motosserra no Parque Natural Municipal das Dunas da Lagoa da Conceição, em Florianópolis, Alexandre Deschamps Schmidt, 40 anos, já foi chamado para a briga por moradores da região. Mas ele costuma andar com uma autorização do órgão ambiental e com uma lei municipal para mostrar que aquelas plantas são de uma espécie exótica invasora (EEI) e prejudiciais ao meio ambiente. [...]ver notícia -
Espécies invasoras causam prejuízo anual de mais de US$ 2 bi no país
Publicado em 01 março 2024Impacto à biodiversidade e ao bem-estar humano pode ser negativo O comércio de animais de estimação e de plantas – ornamentais e hortícolas – é a principal via de introdução de espécies exóticas invasoras em território brasileiro . O fenômeno, que gera um prejuízo de US$ 2 a US$ 3 bilhões por ano ao país, afeta todas as regiões e preocupa pesquisadores pelos impactos [...]ver notícia -
Surprising new treatment helps ease depression
Publicado em 28 fevereiro 2024An ancient practice could offer new hope to those with depression after scientists discovered the powerful effects of acupuncture on patients – with a particular focus on their ears. Scientists in Brazil discovered that twice-weekly sessions of just 15 minutes over six weeks could improve recovery rates by almost 60%, similar to studies focusing on treatments using drugs. Depression is one of the leading causes of disability worldwide, according to the World Health Organisation [...]ver notícia -
In the Cerrado, crop diversification has beneficial effects on wildlife and reduces the presence of boars
Publicado em 12 fevereiro 2024A boar in an area of Cerrado in the northeast of São Paulo state. These exotic mammals are classed as pests, preying on crops and forcing out native species. They are more plentiful in areas of monoculture with scant native vegetation. Credit: Ecology and Conservation Laboratory/LAEC-FFCLRP-USP There are no substitutes for native vegetation, but replacing large areas of monoculture with diversified crops in places where agricultural activities are widespread can have beneficial [...]ver notícia -
Botany research discovery could optimize production of annatto powder
Publicado em 12 fevereiro 2024The study showed that a decline in production of microRNA 156 at the end of the juvenile phase coincides with a rise in production of the pigment. Credit: Fábio Tebaldi Silveira Nogueira/ESALQ-USP Researchers at the University of São Paulo's Luiz de Queiroz College of Agriculture (ESALQ-USP) and the Federal University of Viçosa (UFV) in Brazil have shown for the first time that bixin or annatto powder, a carotenoid pigment extracted from the seeds of the achiote or [...]ver notícia -
Study reveals mechanism that aggravates tuberculosis and reduces survival rates
Publicado em 08 fevereiro 2024CD4+ T cells have been highlighted in the scientific literature for the important role they play in the immune response to lung infections. However, an article published in the journal Cell Reports shows that an imbalance in the volumes of these defense cells in different parts of the lung in response to infection can do more harm than good. The study described in the article involved infecting mice with hypervirulent tuberculosis and influenza. The authors concluded that an "ideal [...]ver notícia -
Jellyfish with bright red cross found in deep-sea volcanic structure
Publicado em 08 fevereiro 2024Scientists say they have found a new species of Medusae — a type of free-swimming, umbrella-shaped jellyfish. The sea creature — which was first spotted in 2002 in a deep-sea volcanic structure in ocean waters south of Tokyo, Japan — has a bright red “X” on its stomach. The findings were published this past November in the scientific journal Zootaxa. The researchers named the marine animal “Santjordia pagesi” after the Cross of St. George because of [...]ver notícia -
Study demonstrates antitumor action of substance present in Brazilian green propolis
Publicado em 07 fevereiro 2024Propolis has long been used in traditional medicine and has won attention from the scientific community following proof of its health benefits, which include antioxidant, anti-inflammatory, antimicrobial, antitumor, and immunomodulatory properties. Its composition varies according to origin, geographic location, and the bee species that produces it. Researchers affiliated with São Paulo State University (UNESP) in Brazil and the University of Southern Denmark (SDU) set out to analyze [...]ver notícia -
New Jellyfish Species Discovered May Have an Arsenal of Unique Venoms
Publicado em 06 fevereiro 2024A new species of jellyfish has been discovered deep below the waves, and it may possess venoms that we have never seen before. The new species, named Santjordia pagesi, was discovered at a depth of 2,664 feet near Japan's Ogasawara Islands, floating around a deep-sea volcano known as the Sumisu Caldera. The new jellyfish, which has been sighted only twice, is an umbrella-shaped medusa species, measuring around 4 inches across and with a red cross in the center of its body, according [...]ver notícia