3.087 - AMICOR (25) em construção
#Dra. Valderês A. Robinson Achutti (*13/06/1931+15/06/2021)
Dia 13 de junho, dia do aniversário dela (estaria fazendo 91 anos), segunda feira, dia de Santo Antônio. Na Igreja do Pão dos Pobres, 17 horas, missa para lembrar um ano do falecimento.
(clicar em Apresentação de Slides)
#Science
The dust trail from the largest comet outburst ever seen will grace the skies this summer — and it’s going to look like a giant hourglass.
The night show will come courtesy of comet 17P/Holmes, which in October 2007 let off a huge flash of gas and dust, brightening by a factor of a million and briefly becoming the largest object in the solar system. In that brief period, its coma, the dust cloud surrounding the comet body, had a bigger diameter than the sun. Full Story: Live Science (6/3) |
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Prehistoric giants used to populate the Earth. These behemoths included mighty dinosaurs, airplane-size pterosaurs, massive crocodiles and snakes, and even armadillos the size of cars. But today, there are just a few big animals on our planet.  | | Caffeine affects gene activity in neurons (green) in a brain region called the hippocampus. (C.J. Guerin, PhD, MRC Toxicology Unit/SPL) | | Research in mice suggests that caffeine creates long-lasting changes in the brain. Animals who drank caffeine-infused water for two weeks had changes in gene-activity patterns in many types of brain cell, leading to an overall decrease in the synthesis of proteins involved in metabolism and an increase in those involved in neuronal signalling and plasticity. After a learning task, the caffeinated mice exhibited a larger boost in the activity of genes involved in processes such as memory formation than did mice that hadn’t consumed caffeine. |
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 | (Yiyo Zamorano, CC BY-SA 4.0 , via Wikimedia Commons) |
The world's oldest tree may have been standing for centuries when the first boulders were erected at Stonehenge, new research suggests. The ancient giant, an alerce (Fitzroya cupressoides) known as the "Gran Abuelo" (or great grandfather in Spanish) that towers over a ravine in the Chilean Andes, may be roughly 5,400 years old, a new computer model suggests. If that date can be confirmed, it would make the Gran Abuelo nearly 600 years older than the current official record holder for world's oldest tree, a Great Basin bristlecone pine (Pinus longaeva) in California known as "Methuselah." Full Story: Live Science (6/8) |
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New ‘Absurdly Fast’ Algorithm for Network Flow DiscoveredBy ERICA KLARREICH Computer scientists can now solve a decades-old problem in practically the time it takes to write it down.
Read the article |
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| |  | Graduate Student’s Side Project Proves Prime Number ConjectureBy JORDANA CEPELEWICZ Jared Duker Lichtman, 26, has proved a longstanding conjecture relating prime numbers to a broad class of “primitive” sets. To his adviser, the proof came as a “complete shock.”
Read the blog
Related:
Mathematicians Outwit
Hidden Number Conspiracy
by Jordana Cepelewicz |
 | Tiny Galaxies Reveal Secrets of Supermassive Black HolesPodcast hosted by SUSAN VALOT;
Story by CHARLIE WOOD Dwarf galaxies weren’t supposed to have big black holes. Their surprise discovery has revealed clues about how the universe’s biggest black holes could have formed.
Listen to the podcast
Read the article |
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Fine-Tuned Gene Expression
A new adaptation of CRISPR enables researchers to change gene expression, rather than changing the genes themselves, reports Emily Mullin for WIRED. This “epigenetic editing” was shown to reverse the effects of early alcohol exposure in rats. Addiction and mental health are known to have epigenetic factors. In 2020 R. Douglas Fields explained for Quanta the role of serotonin and dopamine in controlling gene expression.
Darkness Down Under
Scientists are building a new dark matter detector in Melbourne. With it, they hope to independently verify in the southern hemisphere an annually periodic signal detected in Italy that some think is evidence of dark matter. Derek Muller explains for Veritasium on YouTube. The signal seen in Italy consistently peaks in June. Some think this is due to Earth moving faster through the invisible dark matter sea in June; others think it’s some other seasonal change, as Natalie Wolchover wrote for Quanta in 2018 |
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Chronic obstructive pulmonary disease: COPD is a major cause of morbidity, mortality, and health-care use worldwide. Innovations in omics and imaging techniques have provided greater insight into disease pathobiology, which might result in advances in COPD prevention, diagnosis, and treatment. Today, we mark 78 years since D-Day and honor those who answered duty’s call on the beaches of Normandy. We must never forget their service and sacrifice in defense of freedom, and we must strive every day to live up to the ideals they fought to defend.
#ZH - Jair Soares #AMUHM https://www.youtube.com/watch?v=rtQ9zhbIprM&authuser=0 |
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