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Giant animals lived in Amazonian mega-wetland
Publicado em 26 fevereiro 2019
A land of giants. This is the best definition for Lake Pebas, a mega-wetland that existed in western Amazonia during the Miocene Epoch, which lasted from 23 million to 5.3 million years ago.
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Found in fruit, rutin helps combat the effects of jararaca viper venom
Publicado em 09 janeiro 2019Rutin, a bioflavonoid (plant pigment) found in certain vegetables and fruits, protects mice against snake venom by minimizing bleeding and inflammation, according to a study performed at the Butantan Institute, a research institution belonging to the government of São Paulo State in Brazil. The research focused on methods to combat the effects of envenomation by the lancehead pit viper Bothrops jararaca, which is responsible for approximately 70% of snakebites in the state, and was conducted [...]ver notícia -
Scientists synthesize molecule capable of eliminating hepatitis C virus
Publicado em 19 dezembro 2018A new compound that inhibits the replication of hepatitis C virus (HCV) in several stages of its lifecycle – and is also capable of acting on bacteria, fungi and cancer cells – has been synthesized by researchers at São Paulo State University (UNESP) in Brazil. The study was supported by São Paulo Research Foundation – FAPESP via several research projects [see list below] and described in an article published in Scientific Reports, an online journal owned by Springer Nature. “What [...]ver notícia -
Ancient DNA from Central, South America reveal genetic exchanges, population turnover
Publicado em 12 novembro 2018An international team of researchers has revealed unexpected details about the peopling of Central and South America by studying the first high-quality ancient DNA data from those regions. The findings include two previously unknown genetic exchanges between North and South America, one of which represents a continent-wide population turnover. The results suggest that the people who spread the Clovis culture, the first widespread archaeological culture of North America, had a major [...]ver notícia -
The new face of South American people
Publicado em 10 novembro 2018The history of the peopling of the Americas has just been interpreted afresh. The largest and most comprehensive study ever conducted on the basis of fossil DNA extracted from ancient human remains found on the continent has confirmed the existence of a single ancestral population for all Amerindian ethnic groups, past and present. Over 17,000 years ago this original contingent crossed the Bering Strait from Siberia to Alaska and began peopling the New World. Fossil DNA shows an affinity [...]ver notícia -
Study On Jararaca Pit Vipers Links ‘Giant’ Specimens Proliferation To Predators
Publicado em 19 setembro 2018In São Paulo, Brazil’s largest city, it is easier to find “giant” jararaca pit vipers (Bothrops jararaca) in a small fragment of Atlantic Rainforest surrounded by urban sprawl than in a nature reserve that is 16 times larger, even though more food is available for snakes in the latter. A new study suggests that the difference may be due to the number of predators in each habitat and not to the availability of food, as the researchers supposed at the outset. Their findings have been [...]ver notícia -
A Study Suggests Structural Difference In The Brain Of Transgender People
Publicado emResearchers at the University of São Paulo’s Medical School (FM-USP) in Brazil used magnetic resonance imaging (MRI) to complete the first study conducted in Latin America to investigate brain volumes in transgender individuals. They performed a structural analysis in search of differences in gray and white matter volume based on MRI scans of the brains of 80 individuals between 18 and 49 years of age, divided into four groups of 20 each: cisgender women, cisgender men, transgender women [...]ver notícia -
Current deforestation pace will intensify global warming, study alerts
Publicado emThe global warming process may be even more intense than originally forecast unless deforestation can be halted, especially in the tropical regions. This warning has been published in Nature Communications by an international group of scientists. “If we go on destroying forests at the current pace – some 7,000 km² per year in the case of Amazonia – in three to four decades, we’ll have a massive accumulated loss. This will intensify global warming regardless of all efforts to reduce [...]ver notícia -
Brazilian study discovers six new species of silky antieaters
Publicado em 26 fevereiro 2018Since the pioneering description made in 1758 by Swedish naturalist and father of taxonomy Carl Nilsson Linnaeus (1707-1778), there was officially one single silky anteater species. This short-snouted, pigmy-sized anteater would then be known for its scientific name, Cyclopes didactyla, after its inclusion on the 10th edition of Systema Naturae, Linnaeus’ magnum opus responsible for describing more than 4,2 animal species. It is found in tropical forests in South and Central America, as well [...]ver notícia -
Compounds isolated from rattlesnake venom show activity against hepatitis C virus
Publicado em 08 fevereiro 2018A group of Brazilian scientists achieved promising results using isolated compounds from the venom of the South American rattlesnake in combat of hepatitis C. The investigation was based on records in scientific literature in which animal venom have shown activity against some viruses, such as yellow fever, measles and dengue – the latter belongs to the same virus family as hepatitis’, the Flaviviridae family. There is a great need for new methods in the fight against hepatitis C. The [...]ver notícia