Redonner la vue aux aveugles : des chercheurs ont trouvé un moyen de faire repousser la cornée SANTÉ - C'est une découverte scientifique importante. Des chercheurs américains ont trouvé le moyen de faire repousser, à partir de cellules souches, la cornée, cette membrane du globe oculaire qui permet le passage de la lumière dans l'œil. De quoi redonner espoir à certains aveugles, notamment ceux victimes de brûlures, de lésions chimiques et de certaines maladies oculaires. Publiée cette semaine dans la revue scientifique Nature, cette recherche a été menée conjointement par des scientifiques d'Harvard, du Boston Children’s Hospital, du Brigham and Women’s Hospital, et du VA Boston Healthcare System. "Les cellules souches limbiques résident dans la limbe de l’œil et aident à maintenir et régénérer les tissus de la cornée. Des cellules difficiles à repérer Or, ces cellules souches sont difficiles à repérer. "Des anticorps ont permis de détecter ces molécules ABCB5, facilitant l’identification de cellules souches dans les tissus cornéens de personnes décédées.
8 Vegetables You Can Regrow Forever and Ever These 8 vegetables you can reuse even after you’re done chopping them up. Bet you didn’t know you could regrow your celery just by sticking the butt-end into a glass of water! It does require some time though but the benefits riding on the project are many. It saves money and you don’t even need a garden. Use fresh scraps only. 1. Regrow them using their discarded roots. 2. Garlic sprouts can be grown from the garlic clove and have a mild flavor from that of garlic. 3. In a well lit area, place the Bok Choy’s root ends in water. 4. Carrot greens can be regrown from carrot tops. 5. Basil cuttings can be used to grow new basil. 6. You can use the leftover celery bottom for this. 7. Romaine lettuce can be grown from the bottom of a lettuce head. 8. If you place the stems of cilantro in a glass of water, they will grow. See something that needs editing? (h/t: unbelievable-facts)
What guitar strings are really doing up close At the end of last year, Viner Logan Gendizzle created this short loop of his guitar strings up close while he plays Weezer’s “Say it Ain’t So”. The result is pretty spectacular-looking, and it’s recently been doing the rounds online again for obvious reasons. But, unfortunately, however interesting it is to look at, the video isn’t actually showing the real vibration of the strings, as Joe Wolfe, physics and acoustics expert from UNSW Science in Sydney, Australia, explained to ScienceAlert when we contacted him about it. Instead, what you’re seeing is “almost certainly an artefact of a moderately slow camera,” says Wolfe. Say it ain’t so… “From the two frets in view, we can see that the whole field of view of the camera is only a few centimetres in the foreground. So why does it look like this in the movie? "The camera does not record all points in a picture at the same time – it scans across in lines from side to side (or sometimes top to bottom) until it has recorded a whole picture.
Say No to Nocebo: How Doctors Can Keep Patients' Minds from Making Them Sicker - Inkfish “First, do no harm,” the saying goes, but that might be close to impossible. Just as our expectations can make us feel better, they can also make us feel much worse. This means that how doctors phrase their instructions or introduce new drugs may have a real impact on our health. But some doctors are trying to figure out how they can do less harm by harnessing the surprising power of their words. “In the classical view that is still taught at medical school and in textbooks, drug actions are purely determined by the drug,” says Ulrike Bingel, a neurologist at the University of Duisburg-Essen in Germany. “But that is not true.” The Latin version of “first, do no harm” (for when you want it to sound extra serious) is primum non nocere. For example, Bingel writes in a JAMA Viewpoint, switching from a brand-name drug to a generic version can make people report more side effects—even when the two drugs are chemically identical. Expectations are key to both placebo and nocebo.
Suspended Animation Human Trials About to Begin With traumatic injuries, timing in treatment can be the difference between life and death. What if surgeons could hit the pause button, giving them precious additional time to treat the wounds? Suspended animation has been featured in a wide array of fictional films, but could it actually work on humans? In Hollywood, suspended animation involves freezing solid (or nearly so), thawing at some point in the future when new medical advances have taken place to treat their conditions. This state of hypothermia can only be sustained by the human body for about two hours. Peter Rhee first tried this technique on 40 pigs in 2000, with the results published in 2006. Due to the extremely time-sensitive and dire nature of the injuries of the test subjects, the FDA has declared that the surgeons will not require informed consent. The team will first use this technique on 10 trauma patients whose injuries would be otherwise fatal.
Why You Should Never Eat Pork There are many religions that specifically forbid the consumption of pork. The meat is considered “unclean” and non-kosher. Is there a reason for this? Is there more to this religious teaching that we should all be aware of? It seems as though the religions that condemn pork consumption are on to something, in fact there are many scientific claims to back this up. Pigs are scavengers by nature, which means that they will eat almost anything, including rotten food, feces, urine, carcasses and even cancerous growths. “Sweating like a pig” yet? According to an investigation by Consumer Reports, 69% of all raw pork samples tested (of about 200 samples) were contaminated with a dangerous bacteria known as Yersinia enteroclitica. Ground pork was more likely to be contaminated than pork chops. According to the report: “We found salmonella, staphylococcus aureus, or listeria monocytogenes, more common causes of foodborne illness, in 3 to 7 percent of samples. As issued by Consumer Reports:
Anti Doping Danmark Målgruppen for undervisningsmaterialet er 8.-10. klasse, og materialet lægger op til faglige og tværfaglige forløb i dansk, samfundsfag, historie, matematik, biologi, engelsk og idræt. Materialet giver en række muligheder og forslag til at arbejde med emnet doping i undervisningen. Formålet med materialet er at oplyse eleverne, så de får forståelse for de udfordringer, der er forbundet med brug af doping, og så de med en større viden kan deltage i debatten om brug af doping. Anti Doping Danmark tilbyder også det gratis E-læringsprogram Ren Vinder. Ren Vinder er baseret på videoer og interaktiv læring, hvor eleverne løbende tager stilling til forskellige emner og testes i viden via små quizzer, der til sidst samles op i et informationsark. Programmet består af 9 moduler, der hver varer ca. 10 minutter, og der indgår blandt andet undervisning i emner som dopingkontrolprocedurer, helbredsmæssige konsekvenser ved dopingbrug, hvordan man er rollemodel og meget andet.
Acute glaucoma discovered to be an inflammatory disease Researchers at the University of California, San Diego School of Medicine and Sun Yat-sen University in China have shown that acute glaucoma in mice is largely an inflammatory disease and that high pressure in the eye causes vision loss by setting in motion an inflammatory response similar to that evoked by bacterial infections. The study, published in this week's issue of the Proceedings of the National Academy of Sciences, has immediate clinical relevance in treating the tens of millions of people worldwide from what is known as acute closed-angle glaucoma. "Our research is the first to show an inflammatory mechanism by which high ocular pressure causes vision loss in acute glaucoma patients," said co-senior author Kang Zhang, MD, PhD and professor of ophthalmology. The second leading cause of irreversible blindness globally, glaucoma refers to a group of eye diseases associated with elevated intraocular pressure broadly classified as either open-angle or closed-angle.