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Sunday, April 24, 2022

3.080 AMICOR (24)

  3.080 - AMICOR (24) em construção

#Dra. Valderês A. Robinson Achutti (*13/06/1931+15/06/2021

No verão de 2003, na praia de Capão da Canoa

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#Pintura Valderês MARGS

#Nature
  • NEWS

A  Brazilian dinosaur - movement to decolonize fossil science

Paleontologist Rodrigo Temp Muller examines a dinosaur fossil from the Triassic period at a Brazilian research support centre.

A palaeontologist examines a dinosaur fossil from the Triassic period (around 250 million to 200 million years ago) in Brazil.Credit: Carl de Souza/AFP via Getty

In December 2020, a paper in the journal Cretaceous Research sent shock waves through the palaeontology community1. It described a dinosaur species that the authors named Ubirajara jubatus — the first dinosaur found in the Southern Hemisphere to display what were probably precursors to modern feathers. The 110-million-year-old fossil had been collected in Brazil decades earlier — but no Brazilian palaeontologist had ever heard of it. The authors of the paper were from Germany, Mexico and the United Kingdom. /.../

#História Pessoal


Aproveitando o tema, colei acima uma foto nossa de 1951, durante uma aventura de escoteiro, escavamos o esqueleto de um fossil (Schafionix Fischeri) em Santa Maria, no bairro da Alemoa, onde no arenito do triássico econtravam-se muitos esqueletos e restos, como se fossem pedras esparsas pelo terreno. Na foto junto comigo e o espinhaço do saurio está a minha direita o saudoso Milton Schansis e a esquerda Chefe Gilberto, nosso lider na época. Clan Ibitory Retan, Chefe Geral Vitor Schuch, avô do atual Reitor da Universidade Federal de Santa Maria.

#Sermo

Happy senior couple in the park
 
 
The Neurotransmitter oxytocin has long been touted as “the love hormone” because it is released during hugging, sexual activity, childbirth, and breast feeding. But a new study takes it a step further, and actually links oxytocin to overall life satisfaction.
 
 
According to the American Association for the Advancement of Science, “People whose brains release more of the neurochemical oxytocin are kinder to others and are more satisfied with their lives. This is the finding of new research, published in Frontiers in Behavioral Neuroscience, that also discovered that oxytocin release increases with age, showing why, on average, people are more caring as they get older.
 

 
Keep reading ►

#Livescience
BIOLOGY

Ticking time bombs of DNA mutation may dictate when animals die
(Clock illustration: Courtesy of Alex Cagan; Background graphic: TEK IMAGE/SCIENCE PHOTO LIBRARY via Getty Images)















Animals carry "mutational clocks" in their cells that dictate how quickly their DNA
picks up mutations. And across species, animals tend to die once they've hit a certain number of mutations, new research finds.

It turns out that, in long-lived mammals like humans, these mutational clocks tick slower
than they do in short-lived mammals like mice, meaning humans reach that threshold
number of mutations at a later age than mice do. This discovery, the researchers said,
could help solve a long-standing mystery in biology.
 Full Story: Live Science (4/26) 

#Academia SR de Letras
























#BBC News




#1/4 de século (30/04/2022)
Júlia Belardinelli Achutti, primeira, linda e única neta



































#Nature 

Nature Reviews Genetics

https://www.nature.com/nrg

04/01/2022 · Nature Reviews Genetics is a monthly reviews journal in genetics 
and genomics. The journal publishes Comments, Reviews and Perspective articles
written by experts in the field,





#JAMA
#
My Bookmarks

PLANETARY SCIENCE | ALL TOPICS

 

Secrets of the Moon’s Permanent Shadows Are Coming to Light

By JONATHAN O'CALLAGHAN

Robots are about to venture into the sunless depths of lunar craters to investigate ancient water ice trapped there, while remote studies find hints about how water arrives on rocky worlds.

Read the article

GRAPH THEORY

 

Elegant Six-Page Proof Reveals the Emergence of Random Structure

By JORDANA CEPELEWICZ

Two young mathematicians have astonished their colleagues with a full proof of the Kahn-Kalai conjecture — a sweeping statement about how structure emerges in random sets and graphs.

Read the article


Related: 
How Big Data Carried Graph
Theory Into New Dimensions

by Stephen Ornes (2021)

EVOLUTION

 

Ancient Genes for Symbiosis Hint at Mitochondria’s Origins

By VERONIQUE GREENWOOD

Was the addition of mitochondria a first step in the formation of complex cells or one of the last? A new study of bacteria tries to answer this contentious question in evolutionary biology.

Read the article


Related: 
Cell-Bacteria Mergers Offer
Clues to How Organelles Evolved

by Viviane Callier (2019)

QUANTIZED COLUMNS

 

What Happens When We Give Animals Our Diseases?

By TARA C. SMITH

While it’s understandable to focus on the diseases affecting humans, it’s important to study how our illnesses may affect animals.

Read the column


Related: 
The Animal Origins
of Coronavirus and Flu

by Tara C. Smith (2020)

QUANTA SCIENCE PODCAST

 

Machine Learning Gets
a Quantum Computing Speedup

Podcast hosted by SUSAN VALOT;
Story by MAX G. LEVY

Two teams have shown how quantum approaches can solve problems faster than classical computers, bringing physics and computer science closer together.

Listen to the podcast

Read the article

Around the Web

On Second Thought
Our current standard unit of time, the second, is based on the cesium clock. But scientists are now planning to redefine it with optical atomic clocks, which have achieved far greater precision, as Alanna Mitchell reports for The New York Times. Optical clocks are sensitive to infinitesimal changes in their environment, even gravitational ones. In 2021 Katie McCormick wrote for Quanta about a clock that revealed gravity’s changing influence on time across a 1-mm cloud of atoms.

Explaining the Higgs Mechanism
Symmetry dictates that the W-boson and other particles in the Standard Model should be massless. So why aren’t they? Matt O’Dowd explains for PBS Space Time how the Higgs mechanism gives things mass. The key to the Higgs mechanism is that an underlying symmetry of the laws of nature can be “spontaneously” broken by the state of a system, as physicist David Kaplan explained in a 2015 video for Quanta.

Thursday, April 21, 2022

3.079 - AMICOR (24)

    3.079 - AMICOR (24)

#Dra. Valderês A. Robinson Achutti (*13/06/1931+15/06/2021

Visitando os jardins do Vaticano, no século passado

(clicar  em Apresentação de Slides)

#Academia SR Medicina
 
 
 
#
My Bookmarks

NUMBER THEORY | ALL TOPICS

 

New Proof Illuminates the Hidden Structure of Common Equations

By LEILA SLOMAN

Van der Waerden’s conjecture mystified mathematicians for 85 years. Its solution shows how polynomial roots relate to one another.

Read the blog

THE JOY OF WHY

 

Why Is Inflammation a Dangerous Necessity?

Podcast hosted by STEVEN STROGATZ

The immune system protects us from a full spectrum of pathogens, but without balance, it can end up hurting us over time, too. The immunologist Shruti Naik explains how our defenses can turn on us.

Listen to the podcast

Read the transcript

Q&A

 

Pondering the Bits That Build Space-Time

By CHARLIE WOOD
Video by EMILY BUDER

Vijay Balasubramanian investigates whether the fabric of the universe might be built from information, and what it means that physicists can even ask such a question.

Read the interview

Watch the video
 

EVOLUTION

 

In Sexy Worms, Inheritance Beyond Genes Can Help Evolution

By CARRIE ARNOLD

Experiments that showed a surprising persistence of sexiness in worms reveal how much we are still learning about the rules governing heritability, epigenetics and natural selection.

Read the article

Related: 
Inherited Learning?
It Happens, but How Is Uncertain

by Viviane Callier (2019)

CRYPTOGRAPHY

 

Which Computational Universe Do We Live In? Here Are Five Possibilities.

By ERICA KLARREICH

In 1995, the computer scientist Russell Impagliazzo described five possible worlds with ascending levels of cryptographic possibility. Any of these could be the world we live in.

Read the blog

Related: 
Cryptographers Achieve Perfect
Secrecy With Imperfect Devices

by Mordechai Rorvig

Around the Web

Batting Average
Supaporn Wacharapluesadee was the first scientist outside of China to sequence SARS-CoV-2. Jon Cohen writes for Science about her efforts to prevent the next pandemic by finding novel bat viruses before they spill over to humans. There is growing support for focusing more science on animal viruses as a way to anticipate and prevent spillover to humans. In 2020 Rodrigo Pérez Ortega wrote for Quanta on recent research into self-disseminating vaccines for wildlife.


Feeling Ghosted
Neutrinos are perhaps the most puzzling particles in the Standard Model. Uncovering their mysteries could help us reveal the secrets of dark matter, too, as Jackson Ryan explains for CNET. Physicists think that several conflicting neutrino measurements could be resolved by introducing a new “dark sector” of particles. These particles might simultaneously explain dark matter and dark energy, Thomas Lewton wrote for Quanta in 2021.
#Nature

#Aeon Magazine