Veículo
Scientific Frontline (EUA)
Em 2024: 1 notícias
Desde 1995: 4 notícias
Craving snacks after a meal? It might be food-seeking neurons, not an overactive appetite
Publicado em
People who find themselves rummaging around in the refrigerator for a snack not long after they’ve eaten a filling meal might have overactive food-seeking neurons, not an overactive appetite.
UCLA psychologists have discovered a circuit in the brain of mice that makes them crave food and seek it out, even when they are not hungry. When stimulated, this cluster of cells propels mice to forage vigorously and to prefer fatty and pleasurable foods like chocolate over healthier foods like [...]
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Copper-based catalysts efficiently turn carbon dioxide into methane
Publicado em 25 setembro 2023The lab of Rice University materials scientist Pulickel Ajayan and collaborators developed a way to wrest the carbon from carbon dioxide and affix it to hydrogen atoms, forming methane ⎯ a valuable fuel and industrial feedstock. According to the study published in Advanced Materials, the method relies on electrolysis and catalysts developed by grafting isolated copper atoms on two-dimensional polymer templates. “Electricity-driven carbon dioxide conversion can produce a large array [...]ver notícia -
Mosquito’s DNA could provide clues on gene expression, regulation
Publicado em 10 fevereiro 2023When it comes to DNA, one pesky mosquito turns out to be a rebel among species. Researchers at Rice University’s Center for Theoretical Biological Physics (CTBP) are among the pioneers of a new approach to studying DNA. Instead of focusing on chromosomes as linear sequences of genetic code, they’re looking for clues on how their folded 3D shapes might determine gene expression and regulation. For most living things, their threadlike chromosomes fold to fit inside the nuclei of [...]ver notícia -
The dwarf planet Ceres was formed in the coldest zone of Solar System and thrust into Asteroid Belt
Publicado em 19 maio 2022In an article published in the journal Icarus, researchers at São Paulo State University (UNESP) and collaborators report the findings of a study reconstituting the formation of the dwarf planet Ceres. The research was conducted by Rafael Ribeiro de Sousa, a professor in the program of graduate studies in physics on the Guaratinguetá campus. The co-authors of the article are Ernesto Vieira Neto, who was Ribeiro de Sousa’s PhD thesis advisor, and researchers affiliated [...]ver notícia