
@KisnerAlexandrei
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Professorial Lecturer @AmericanU Dept of Neuroscience 🧠 Ex-professional 800m Runner 🏃♂ 2x State champion 🥇 🇧🇷
Washington, DC
Joined January 2016
- Tweets3.6K
- Following918
- Followers195
- Likes21.1K
Pinned Tweet
"It is possible that the 5-HT in our brains play an essential part in keeping us sane"
Sir John Gaddum, 1954
Alex retweeted
Nesse dia dos professores não poderia deixar de lembrar da BRAVURA de uma GUERREIRA E HEROÍNA BRASILEIRA:
Heley de Abreu Silva Batista • #DiaDosProfessores
Alex retweeted
Feliz Dia dos Professores a todas e todos que dedicam a vida à educação!
Nunca se esqueçam que há quem dependa do nosso trabalho, mas despreza a nossa classe. Por isso, não vote em quem chama professor de vagabundo. Quem desrespeita a educação não merece o seu voto.
Alex retweeted
DIFÍCIL SITUAÇÃO DO BRASIL
- Eventual governo Lula: com rumo, sem maioria legislativa. Não consegue implementar o rumo
- Eventual governo Flávio: com maioria legislativa, sem rumo. Consegue implementar a falta de rumo
Alex retweeted
BREAKING NEWS
The Royal Swedish Academy of Sciences has decided to award the 2026 Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel to Robert E. Hall and Michael Woodford “for microeconomic foundations of macroeconomic stabilisation.”
#NobelPrize
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Quando um candidato a presidente tem uma conta conjunta com o principal fraudador do INSS e a maior rede de TV do país ignora, a última coisa do mundo que ela faz é jornalismo.
#CORAGEMFANTASTICO
Alex retweeted
Mobilização pela defesa da democracia no Brasil.
Reflita, não vote por antipatia ou ódio, muitas vezes gratuito. Vote pelo seu país.🇧🇷
Alex retweeted
Oi
Emails obtidos pela Polícia Federal indicam que o senador Flávio Bolsonaro (PL), candidato à Presidência da República, compartilhava uma conta bancária no Santander com o advogado e empresário Willer Tomaz, suspeito de envolvimento em um esquema de lavagem de dinheiro relacionado a fraudes no INSS. Os dois negam. As informações foram reveladas inicialmente pelo UOL e confirmadas pela Folha.
📲Leia mais na #Folha: mla.bs/8ded69f00a
📷 Mauro Pimentel - 9.out.26/AFP
📝 Raquel Lopes
#PraTodosVerem: O senador Flávio Bolsonaro (PL) durante campanha presidencial no Rio de Janeiro
Alex retweeted
Curiosity often sparks scientific breakthroughs. For 2026 medicine laureate Peter Hegemann, it began with a question: how could a tiny green alga called Chlamydomonas react so rapidly to light?
The Chlamydomonas algae is famous for its ability to swim towards light. When the alga is stirred into a petri dish, the liquid turns a faint green colour. If one side of the dish is illuminated, the green colour moves towards the light source, as the microscopic algae swim towards it. The algae sense the light with an eyespot, a dot on the cell’s surface that contains a light-capturing molecule, retinal.
Hegemann discovered electrical signals in the light-sensitive eyespot that occurred just half a millisecond after illumination, far faster than the response of the human eye. He could only think of one explanation for this ultrafast response: the process must be much simpler than in a human eye. He proposed that a single protein could both detect light and act as an ion channel, an idea initially met with scepticism.
After years of experiments with his colleague Georg Nagel, Hegemann's hypothesis proved to be correct. Together, they discovered proteins that functioned exactly as he had predicted: ion channels that opened in response to light. This breakthrough laid the foundation for optogenetics, a revolutionary technique that allows scientists to control individual nerve cells with light. What began as a question about a microscopic alga ultimately helped transform the field of neuroscience.
Read more about the newly awarded 2026 Nobel Prize in Physiology or Medicine: bit.ly/4jNd5w7
Alex retweeted
1. CRISPR came from basic research on bacteria.
2. Optogenetics started with a discovery in algae.
3. The GFP protein comes from jellyfish.
The biggest breakthroughs all trace to scientists follow their curiosity. This is one huge reason why we must keep funding basic research!
Alex retweeted
BREAKING NEWS
The Norwegian Nobel Committee has decided to award the 2026 #NobelPeacePrize to Navanethem “Navi” Pillay for her efforts to promote peace and international law.
#NobelPrize
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BREAKING NEWS
The 2026 #NobelPrize in Literature is awarded to the Canadian author Anne Carson, “for her bold and inventive oeuvre that, in playful dialogue with the classical tradition, has created new forms for contemporary literature.”
Alex retweeted
BREAKING NEWS
The Royal Swedish Academy of Sciences has decided to award the 2026 #NobelPrize in Chemistry to Henri B. Kagan and Kenso Soai “for the discovery of non-linear effects and autocatalysis in asymmetric organic synthesis.”
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Como pode votar nesse candidato alguém que sai de casa todos os dias para trabalhar e lida com patrões, como tantos; que exploram e pagam mal?
Alex retweeted
#SelecciónMayor El último tango tenía que ser en Argentina: Messi y el cierre de una historia que ya es eterna.
📰 shorturl.at/ugLRG
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“Beyond all the other risks, this was what really made the project possible – and that was pure luck.”
We got hold of the new physics laureate Francis Halzen right after he learned of his Nobel Prize. In this conversation, he speaks about the hurdles that he and his team had to overcome in the process of creating the neutrino detector on the South Pole – and how one of the crucial discoveries was ’totally unexpected.’
Halzen also talks about how his work on neutrino detection could lead to clues about the universe’s black holes.
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"Vou em paz.
Dei tudo de mim.
Essa camisa foi meu sonho.
Meu orgulho.
E minha vida.
Obrigado por me amarem tanto".
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"O melhor de todos, porque melhorou a todos nós".
A homenagem da seleção argentina a Lionel Messi no dia de sua despedida.
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Say hello to our 2026 physics laureate Francis Halzen!
Halzen sent us a snapshot from his hotel room in Italy - join us in congratulating our new #NobelPrize laureate.






















