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The genetic blueprint material for SARS-CoV-2 is called RNA (yellow spirals). The RNA contains information to specify the amino acids that make up the proteins, which are the actual building blocks for the virus particle. The RNA is protected in the virus envelope (black outer ring) until a potential host cell is found. The envelope is made up of several proteins, including envelope protein (blue spikes); membrane protein (yellow
Here's a list of health terms to help you navigate the latest COVID-19 research and updates. Efficacy: How well something, like a vaccine or treatment, works in a clinical trial. Variant: A virus that has changed from its original version. A variant usually has a "mistake" in an amino acid, which is also called a mutation. Antibody: A protein our immune systems make to fight off germs. Antibodies can
Eternal Change for No Energy: A Time Crystal Finally Made Real
By NATALIE WOLCHOVER
Like a perpetual motion machine, a time crystal forever cycles between states without consuming energy. Physicists claim to have built this new phase of matter inside a quantum computer.
Já fui Cardiologista Pediátrico e fundador do Departamento de Cardiologia Pediátrica da SBCgia Pediátrica da SBC, juntamente com Dra. Rachel Snitkowsky, origem da Sociedade Brasileira de Cardiologista Brasileira. Também fui "Paediatric Cardiology Fellow from the Amarican Paediatric Academy!
#Dra. Valderês A. R. Achutti (*13/06/1931+15/06/2021) Hidelberg década de 90
#Da: ZH do dia 21/07
Foi um belo encontro que muito nos honrou ao representar tantos colegas numa entidade que nos congrega, defendende nossa profissão e os principios e valores que a caracterizam. Quando estiver disponível, terei o prazer de divulgar o acesso à memória do evento.
#From: NATURE
Early cancer diagnosis now possible with new blood test
A promising new diagnostic designed to detect cancer before symptoms appear is considered to be ready for primetime and will be piloted by England’s National Health Service (NHS) in fall of 2021. The non-invasive blood test helps to detect types of cancer that are typically more difficult to diagnose in early stages—among them, head and neck, ovarian, pancreatic, oesophageal, and some blood cancers. The test hinges on recognizing bits of DNA released from tumors that become free-floating in the bloodstream. It was developed using a machine-learning algorithm that was fine-tuned by feeding the system methylation patterns in DNA in blood samples from thousands of patients. The test has a success rate of about 52% across all cancers and a false positive incidence of less than 1%. (Read More)
Aging is associated with a progressive decline in brain function that manifests in cognitive impairments, increased risk for neurodegenerative diseases, and loss of neural plasticity. Lifestyle factors, including physical exercise, cognitive stimulation, and social interaction, attenuate age-related reductions of brain function in humans1,2,3,4, contributing to what is called “reserve” or “maintenance” of brain function5,6.
Are you genetically protected from obesity? In a study that involved the genomes of more than half a million people, researchers found that people carrying mutations inactiviting a copy of a certain gene tended to have half the odds of being obese. This gene—GPR75—is one of the 16 tied to body mass index (BMI), a flawed but still generally-accepted measure of obesity. While a mutation on this gene only occurs in about 1 in 3000 people, its protective effects has potential implications for seeking out drugs that could switch it off therapeutically. (Science Magazine)
#From: NATURE
Borgs seem to be associated with single-celled microorganisms known as archaea, shown in this scanning-electron microscopy image. (Eye of Science/SPL)
The Borg have landed — or, at least, researchers have discovered their counterparts here on Earth. Scientists analysed samples from muddy sites in the western United States and found DNA structures that seem to scavenge and ‘assimilate’ genes from microorganisms in their environment, much like the fictional Star Trek ‘Borg’ aliens who assimilate the knowledge and technology of other species. These extra-long DNA strands, which the scientists named in honour of the aliens, join a diverse collection of genetic structures — circular plasmids, for example — known as extrachromosomal elements.
China, the world’s largest emitter of greenhouse gases, has launched its first national emissions-trading scheme. Such carbon-pricing mechanisms already exist in around 45 countries, but China’s is the world’s biggest. It has been plagued by delays, and researchers argue that it might not be ambitious enough to enable the country to meet goals including a 2030 deadline for peak emissions and a 2060 target for net-zero emissions. But they are hopeful that the market will have a far-reaching impact over time.
Cerimônia com balões dourados e plantio de árvores será realizada hoje no terraço de um dos novos prédios da instituição
Do alto de um dos prédios novos do complexo do Hospital de Clínicas de Porto Alegre (HCPA), uma revoada de balões dourados e o plantio de mudas de árvores marcarão, às 11h30min de hoje, o aniversário de 50 anos da instituição. Os protagonistas da cerimônia, pensada para simbolizar esperança, serão 50 funcionários escolhidos por sorteio, que também manifestarão seus desejos para o futuro.
O palco da celebração, o terraço do Bloco B, representa, justamente, os planos para o que ainda vem pela frente na já consolidada história de cinco décadas que transformou o HCPA em um centro de referência em assistência, ensino e pesquisa, conduzido por uma comunidade de 10,3 mil funcionários, professores, residentes, pesquisadores, estudantes, estagiários e jovens aprendizes.
.......História em números
Mais de 20 milhões de consultas 1,2 milhão de cirurgias 1 milhão de internações 130 mil partos 8 mil transplantes
Atualmente, são 10,3 mil funcionários, professores, residentes, pesquisadores, estudantes, estagiários e jovens aprendizes; 55 serviços médicos, 16 de enfermagem e oito multiprofissionais, entre outras áreas
#From Scientific America
China pode estar tomando dianteira na corrida global por novas tecnologias quânticas
Divulgação de três feitos importantes no último mês mostra que competição entre EUA e China está acirrada. Superioridade tecnológica tem implicações tanto para ciência quanto para as relações geopolíticas.
Representação artística de uma partícula quântica. Foto: Shutterstock
Quando uma equipe de cientistas chineses transmitiu fótons emaranhados a partir do satélite Micius do país para conduzir a primeira videochamada segura por criptografia quântica em 2017, os especialistas declararam que a China alcançou assumiu a liderança na corrida pela comunicação quântica. Novas pesquisas sugerem que essa liderança também se estende à computação quântica.
Três artigos postados no arXiv.org no mês passado por físicos da Universidade de Ciência e Tecnologia da China (USTC) relataram importantes avanços tanto na comunicação quanto na computação quântica.
#De: BBC NEWS
100 anos da vacina BCG e o misterioso cientista Uruguaio
que trouxe a vacina contra a tuberculose ao Brasil
André Biernath - @andre_biernath
Da BBC News Brasil em São Paulo
Ninguém sabe onde e quando ele nasceu. A data e local da morte também são desconhecidos. Não há sequer uma foto de seu rosto.
Mesmo assim, Julio Elvio Moreau figura na lista dos personagens mais importantes da saúde pública brasileira: foi ele quem, ainda na década de 1920, trouxe ao nosso país as primeiras culturas de bactérias para a fabricação da vacina BCG, que nos protege contra a tuberculose e suas formas mais graves./.../
#From:NATURE
This exquisitely detailed image charts the connections between thousands of cells in a tiny sliver of human brain. The sample was taken from the cortex — the part of the brain responsible for complex thought — and cut into thin slices that were imaged using electron microscopes. Scientists then stitched the images back together digitally and analysed them with the help of artificial-intelligence programs. These can, for example, map the positions of synapses — junctions where electrical signals pass between nerve cells. Different types of neuron have been artificially colour-coded. See more of the month’s sharpest science shots, selected by Nature’s photo team. (Nature | Leisurely scroll) (Credit: DR Berger, A Shapson-Coe, JW Lichtman)
Have you ever wondered what happens when you sleep? Interestingly, a lot goes on with your brain and body while you’re catching some Zzz’s.
While you’re snoozing, your mind and body journey through a series of events designed to reduce your consciousness and awareness, relax your muscles and alter your brain waves. Some organs get to power down to minimal functionality to maintain or reset, while others get to work as a cleanup crew after the main event.
These events play out in stages that repeat in cycles several times throughout a typical 7- to 8-hour sleep session. Yet you remain blissfully unaware of what your brain and body are doing throughout all this activity.
So, how many stages of sleep do you go through? And what is a sleep cycle?/.../
#From:The Public Domain Review<newsletter@publicdomain
para mim
Vol. 11 #11
NEW ESSAY
Picturing Scent: The Tale of a Beached Whale
What can visual art teach us about scent, stench, and the mysterious substance known as ambergris? Lizzie Marx follows a “whale-trail” across history to discover the olfactory paradoxes of the Dutch Golden Age.
Uma recente enquete publicada no site do American College of Cardiology (ACC) surpreendeu o Dr. Mauricio Wajngarten pela quantidade de respostas erradas a respeito das alterações observadas em exames diagnósticos relacionadas ao envelhecimento "normal". Citando referências atuais sobre o tema, o cardiologista destaca 10 aspectos que devem ser levados em conta na interpretação de exames de idosos.
New Shape Opens ‘Wormhole’ Between Numbers and Geometry
By KEVIN HARTNETT
Laurent Fargues and Peter Scholze have found a new, more powerful way of connecting number theory and geometry as part of the sweeping Langlands program.
How Bell’s Theorem Proved ‘Spooky Action at a Distance’ Is Real
By BEN BRUBAKER
The root of today’s quantum revolution was John Stewart Bell’s 1964 theorem showing that quantum mechanics really permits instantaneous connections between far-apart locations.
Plasmid, Virus or Other? DNA ‘Borgs’ Blur Boundaries.
By JORDANA CEPELEWICZ and ALLISON WHITTEN
Biologists have uncovered novel DNA structures inside archaea dredged from muddy swamps. Named after a Star Trek alien race, these “Borgs” could open new possibilities for microbiology.
Ripples of the Multiverse The “many worlds” interpretation of quantum mechanics isn’t what you think. In this PBS Space Time video, Matt O’Dowd explains how the “worlds” would be more like ripples on a pond than branches in a timeline. If other versions of you exist, what does that mean for the concept of self? Philip Ball wrote for Quanta about the idea’s troubling implications in 2018.
Private Jets The EHT telescope has dropped its latest black hole portrait. The planet-sized array imaged the jets unleashed by a nearby black hole, Maria Temming reports for Science News. The process that fires stuff away from a black hole remains mysterious, but EHT images are helping to demystify the jets, Natalie Wolchover reported for Quanta this year.