Saturday, May 13, 2023

3.136 AMICOR (25)

 3.136 AMICOR (25) próximo dia 17 estaremos completando 26 anos na WEB!

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



#Slideshow: 106 fotos de abertura Clicar em apresentação de slides

#Science Magazine

Like treasured recipes that are passed down from generation to generation, there are only certain regions of DNA that evolution dares not alter. Mammals around the world share a variety of these coding sequences, for example, which have remained intact for millions of years.

Humans are a rare exception to this club. For whatever reason, the recipes long held by our ancient ancestors were suddenly “spiced up” in a short period of evolution. Because we are the only species in which these regions have been rewritten so quickly, they are called ‘human accelerated regions’ (or HARs). Furthermore, scientists believe that at least some of the HAR may be the source of many qualities that distinguish humans from their close relatives, such as chimpanzees and bonobos./.../



SOLAR SYSTEM

The Voyager probes raised perplexing questions as they exited the Solar System. Now, scientists have conceived new missions to interstellar space. Learn more: scim.ag/2zb

Coronal loops are arches of magnetized plasma that protrude from the surface of the sun. Here, the loops in a magnetic dance.
Coronal loops are arches of magnetized plasma that protrude from the surface of the sun. Here, the loops in a magnetic "dance."
Credit: NASA/SDO/HMI/AIA/LMSAL
#Science
Scientists discover secret 'symmetries' that protect Earth from the chaos of space
BlenderTimer / Pixabay
A new analysis of chaos in the solar system reveals how planetary collisions are avoided over billions of years.
Read More
newsletter image

How Pythagoras turned math into a tool for understanding reality

Reality was made of numbers, Pythagoras said, and he employed numbers to explain the “harmony of the heavens.”
Read More

 #NAUTILUS


Our Most Read Stories from Each Year

This week marks 10 years since Nautilus first started publishing. Let’s have a look back at the most-read articles from each of our first 10 years. 


#Medscape
May 11, 2023
Cães detectam covid-19 em crianças e adolescentes assintomáticos
Hipoglicemia, câncer, malária, convulsões iminentes, migrânea e agora... covid-19. Pesquisa preliminar mostra que cães farejadores podem identificar pacientes assintomáticos infectados por SARS-CoV-2.
Saiba mais ›

Human pangenome supports analysis of complex genomic regions

QUOTE OF THE DAY

“Humans live in a culture in which it seems as if everything must go right the first time we try it, but that is not how successful products are developed, nor how science unfolds.”

Recent space-exploration hiccups — such as the loss of an international Moon mission and the untimely end of the SpaceX Starship rocket test — show that failures are painful but essential part of the work, argues a Nature editorial. (4 min read)

Gut microbes likely contribute to the development of anorexia  

Your gut hosts a massive population of more than 1,000 bacterial species,
which outnumber the cells in your body by a factor of ten, and they
contain at least 100 times more genesthan are encoded by your own DNA.
It is also home to many thousands of viral species, aswell as archaea
and fungi.These microbes, collectively referred to as the gut microbiome, 
begin to colonize the gastrointestinal tract at birth. Research published
over the last 20 years has implicated gut bacteria in numerous processes,
ranging from brain development and immune system function
to digestion and drug metabolism.        As well as playing vital roles in
maintaining health, gut bacteria are also linked to a wide variety
of chronic diseases, including asthma, diabetes, irritable bowel disease,
and rheumatoid arthritis, as well as mental health disorders such
as anxiety and depression. Research published in the journal
Nature Microbiology now suggests that gut microbes contribute 
to anorexia nervosa./.../












#Resgate de artigos antigos meus já publicados na imprensa...

De Médicos e Medicina (data?)

Aloyzio Achutti. Médico.

É curioso e intrigante observar o crescente prestígio e valorização da Medicina, enquanto médicos e pacientes estejam cada vez mais insatisfeitos com a prática. As ciências biomédicas (não confundir com medicina) têm se desenvolvido vertiginosamente na esteira das conquistas científicas e tecnológicas permitindo a realização de diagnósticos e tratamentos até há bem pouco inimagináveis. Estes recursos tornam-se cada vez mais caros por serem tratados como produtos de mercado, e envolverem custos marginais relacionados com inúmeros interessados da indústria farmacêutica, de equipamentos, organizações hospitalares, de pesquisa, securitárias, de especulação financeira, político-governamentais e de outras profissões que atuam no mesmo setor. Além de lidar com a vida humana (cujo valor é inestimável), a operação deste oneroso e complexo sistema depende ainda em grande parte do médico, sobrando-lhe cada vez menos para remunerar seu trabalho e comprometendo-lhe a autonomia.

É bem possível que a crise seja bem mais ampla e relacionável com a problemática observável em outros setores, quando se diz serem necessárias reformas econômica, política e ética para readequar a estrutura de nossa sociedade, por não mais corresponder ao grau e tipo de desenvolvimento e globalização.

Além da impossibilidade de conciliar totalmente os interesses do paciente, da ciência e do profissional, é preciso enfrentar o dilema da qualidade e da extensão de cobertura. As soluções adotadas, mesmo com o suporte de recursos tecnológicos, não têm o dom de multiplicar o número de profissionais capacitados, preservar a continuidade e estender o tempo necessários para estabelecer uma adequada relação médico-paciente, e ao mesmo tempo promover o atendimento em massa.

Em condições muito menos complexas, com uma demanda certamente bem mais reduzida e exigente, Platão já reconhecera o dilema, e estabelecera duas categorias de profissionais:  os médicos de escravos e os de homens livres. Os primeiros corriam de um paciente a outro sem maiores preocupações (expressão usada por ele), enquanto que os de homens livres esperavam convencer o paciente antes de proceder a cura.

A abrangência atual e diversidade dos objetivos profissionais têm ofuscado o foco primordial e humanístico, dificultando o relacionamento, complicando a formação, e distraindo a atenção das causas das causas das doenças. Ao mesmo tempo nosso modelo cultural centrado no pragmatismo mercadológico e competitividade agressiva, tem corroído muito do idealismo de uma profissão inicialmente confundida com o sacerdócio...

Bem, quando descobrimos que até os sacerdotes não são mais os mesmos, quem sabe não é chegado o tempo de reservar o título de médico somente para aqueles que se conformem com a prática da medicina centrada na pessoa humana, integrada em seu contexto histórico e social?

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My Bookmarks

QUANTUM COMPUTING | ALL TOPICS

 

Physicists Create Elusive Particles That Remember Their Pasts

By CHARLIE WOOD

In two landmark experiments, researchers used quantum processors to engineer exotic particles that have captivated physicists for decades. The work is a step toward crash-proof quantum computers.

Read the article

MACHINE LEARNING

 

Chatbots Don’t Know What Stuff Isn’t

By MAX G. LEVY

Today’s language models are more sophisticated than ever, but they still struggle with the concept of negation. That’s unlikely to change anytime soon.

Read the article


Related: 
Machines Beat Humans on a Reading Test.
But Do They Understand?

By John Pavlus (2019)

EVOLUTION

 

A Mutation Turned Ants Into Parasites — Quickly

By VIVIANE CALLIER

A new genetics study of ant “social parasites” shows how complex sets of features can emerge very rapidly and potentially split species.

Read the article


Related: 
How Supergenes Fuel Evolution
Despite Harmful Mutations

By Carrie Arnold (2022)

Q&A

 

A Plan to Address the World’s Challenges With Math

By KEVIN HARTNETT

Minhyong Kim is leading a new initiative called Mathematics for Humanity that encourages mathematicians to apply their skills to solving social problems.


Read the interview

QUANTA SCIENCE PODCAST

 

Scientists Rethink the Causes of Alzheimer’s (Part 2)

Podcast hosted by SUSAN VALOT;
Story by YASEMIN SAPLAKOGLU

If plaques of amyloid protein in the brain aren’t the root cause of Alzheimer’s disease, what is?

Listen to the podcast

Read the article

Around the Web

The Human “Pangenome”
A new genome map based on 47 diverse individuals aims to capture the full genetic variation of humans, reports Antonio Regalado for MIT Technology Review. Despite the human genome being declared “complete” in 2000, additional sequencing has been an ongoing, decades-long effort. In a 2021 interview for Quanta, Carrie Arnold spoke with Karen Miga, one of the primary researchers behind the new “pangenome” project, about her work filling in the missing pieces of the human genome.


Nutty Non-Newtonians
Although peanut butter doesn’t flow like water, it’s still a liquid. For The Conversation, mechanical engineer Ted Heindel explains the physics of the sandwich spread and other non-Newtonian fluids. Some non-Newtonian fluids are viscoelastic: They seize up when they flow too fast. In 2022, Adam Mann wrote for Quanta about a new discovery that chaotic flow causes this counterintuitive phenomenon.
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