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Em 2026: 114 notícias
Desde 1995: 427 notícias
Model predicts scenarios for power generation using nuclear fusion
Publicado em 29 de janeiro de 2018
Nuclear fusion for the controlled and regular generation of electric power by converting hydrogen into helium and reproducing on a small scale what happens in our Sun (as well as other stars) is one of the foremost technological promises for the decades ahead.
So far, only limited results have been achieved in laboratory experiments. Now, a prototype reactor called ITER - "the way" in Latin - is under construction in southern France. Its design capacity is for 500 megawatts, and the plan is to [...]
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AI 'scientist' finds that toothpaste ingredient may help fight drug-resistant malaria
Publicado em 18 janeiro 2018An ingredient commonly found in toothpaste could be employed as an anti-malarial drug against strains of malaria parasite that have grown resistant to one of the currently-used drugs. This discovery, led by researchers at the University of Cambridge, was aided by Eve, an artificially-intelligent 'robot scientist'. When a mosquito infected with malaria parasites bites someone, it transfers the parasites into their bloodstream via its saliva. These parasites work their way into the liver, where [...]ver notícia -
International study identify the process of rock formed by meteors or nuclear blasts
Publicado em 16 janeiro 2018Coesite is a polymorph of silica that only forms under extremely high pressure - 10,000 times more on average than normal atmospheric pressure. The presence of this rock at a site indicates either that material has pushed up through Earth's crust from the mantle (a silicate rocky shell between the crust and the core with an average thickness of 2,886 km and depths ranging from 30 km to almost 3,000 km below the crust) or that a celestial body (a comet, meteor or meteorite) fell there. Coesite [...]ver notícia -
Researchers engineer ultra-sensitive temperature sensor
Publicado em 11 janeiro 2018Can a "thermometer" consist of a thin film or tiny (micrometer or even nanometer scale) particles, operate in real time and in very well-defined regions with a spatial resolution ranging from a centimeter to a micrometer, and be capable of measuring temperatures with exceptional sensitivity in a wide band between 80 kelvin (minus 193 °C) and 750 kelvin (476 °C)? The answer is yes. The device, created in the laboratory by researchers at the University of São Paulo (USP) and the University of [...]ver notícia -
How good bacteria control your genes
Publicado em 09 janeiro 2018Key Messages: Good bacteria in the gut can produce a chemical signal that affects the human genome The changes in the genome may help to fight infections and prevent cancer The chemical signal is produced by bacteria from the digestion of fruits and vegetables Scientists from the Babraham Institute near Cambridge in collaboration with colleagues from Brazil (here and here) and Italy have discovered a way that good bacteria in the gut can control genes in our cells. The work, [...]ver notícia -
Metabolic pathway involved in immune response to Zika also participates in neurogenesis
Publicado em 09 janeiro 2018Researchers at the University of Campinas (UNICAMP) in São Paulo State, Brazil, have identified molecules that serve as markers of Zika in blood serum taken from patients with this viral infection. The finding enabled the group to discover an important cellular signaling pathway involved in the immune response to Zika. The study was published in the journal Frontiers in Microbiology. "This same cellular signaling pathway is involved in neurogenesis - the process of new neuron formation - [...]ver notícia -
Novel methodology increases resolution in oligodendrocyte proteomics
Publicado em 03 janeiro 2018One of the key challenges of proteomics, the study of all proteins expressed by a cell or organism, is managing to distinguish between molecules that are structurally different yet have the same mass. This is hard because a mass spectrometer, the main apparatus used in this type of study, works like a weighing scale, sorting the molecules analyzed according to their mass. One way to reduce confusion when using a mass spectrometer is to start by submitting the sample to liquid chromatography, [...]ver notícia