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Chochilino
Em 2025: 0 notícias
Desde 1995: 4 notícias
Fear can really make hair white, new research suggests
Publicado em 23 de janeiro de 2020
For centuries the legend of the hair of people who turn white from fear has persisted.
Notoriously, Marie Antoinette’s lush strawberry blonde locks were said to have turned white the night before her execution.
Now new research, published in the journal Nature, suggests that extreme stress can actually cause hair pigmentation loss.
Experiments conducted by a team from Harvard University have shown that extreme stress levels cause the sympathetic nervous system to become hyperactive, [...]
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DECODED: HOW STRESS TURNS HAIR WHITE
Publicado em 23 janeiro 2020According to the scientists, the sympathetic nervous system, which triggers the body's rapid involuntary response to dangerous situations, is affected directly by the stress, and consists of nerves that branch from the spine and run throughout the body. Researchers have identified for the first time the mechanism by which chronic stress causes hair colour loss, an advance that may lead to the development of novel drugs which can prevent the whitening of hair. In the study, published [...]ver notícia -
A shocking find : new high-voltage electric eels revealed
Publicado em 10 setembro 2019Call it a shock discovery: DNA research has revealed two entirely new species of electric eel in the Amazon basin, including one capable of delivering a record-breaking jolt. The findings are evidence, researchers say, of the incredible diversity in the Amazon rainforest — much of it still unknown to science — and illustrate why it is so important to protect a habitat at risk from deforestation, logging and fires. “In spite of all human impact on the Amazon rainforest in the [...]ver notícia -
Scientists calculate radiation dose in bone remains from Hiroshima bombing victim
Publicado em 03 maio 2018In an article published in PLOS ONE, Brazilian researchers describe the first retrospective dosimetric study by electron spin resonance spectroscopy using human tissue from nuclear attack victims. Credit: Sergio Mascarenhas (IFSC-USP)The bombing of the Japanese cities Hiroshima and Nagasaki by the United States in 1945 was the first and only use of nuclear weapons against civilian targets. Researchers conducted a series of studies in its aftermath to measure the impact of the fallout, in terms [...]ver notícia