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308 results for Biology

Science Tips, January 2010
Science Tips, January 2010

https://www.weizmann-usa.org/news-media/news-releases/science-tips-january-2010/

Jan 14, 2010... How do the visual images we experience, which have no tangible existence, arise out of physical processes in the brain? New research at the Weizmann Institute of Science provides evidence, for the first time, that an “ignition” of intense neural activity underlies the experience of seeing.
In research recently published in the journal Neuron, Prof. Rafael Malach and research student Lior Fisch of the Weizmann Institute’s Department of Neurobiology worked with a neurosurgeon, Dr. Itzhak Fried of Tel Aviv Sourasky Medical Center, a distinguished team of medical doctors from the Center, and Weizmann Institute students. They asked a group of epileptic patients who had had electrodes clinically implanted into their brains in preparation for surgery to volunteer for some perceptual awareness tasks. The subjects looked at a computer screen, which briefly presented a “target” image—a face, house, or man-made object. This image was followed by a “mask”—a meaningless picture for distraction—at different time intervals after the target image had been presented. This allowed the experimenter to control the visibility of the images—the patients sometimes recognized the targets and sometimes failed to do so. By comparing the electrode recordings to the patients’ reports of whether they had correctly recognized the image or not, the scientists were able to pinpoint what was happening—and when and where—in the brain as transitions in perceptual awareness took place.

TAGS: Genetics, Neuroscience, Plants, Biology, Senses

40 Trillion Bacteria on and in Us? Fewer Than We Thought.
40 Trillion Bacteria on and in Us? Fewer Than We Thought.

https://www.weizmann-usa.org/news-media/in-the-news/40-trillion-bacteria-on-and-in-us-fewer-than-we-thought/

Feb 15, 2016... E. coli bacteria. The most common number cited for how much bacteria each person carries is almost certainly wrong. Credit David M. Phillips/Science Source
There are a lot of bacteria on us and in us – our microbiome, it is called. Calculating exactly how many microbes each of us carries is hard, and the most common number cited, both in popular and scientific literature, is almost certainly wrong.

TAGS: Biology, Bacteria

What’s the Best Time of Day to Exercise, Morning or Evening?
What’s the Best Time of Day to Exercise, Morning or Evening?

https://www.weizmann-usa.org/news-media/in-the-news/what-s-the-best-time-of-day-to-exercise-morning-or-evening/

Jul 21, 2019... Some people are morning exercisers. For them, an early run or swim is as much a part of their wake-up ritual as that first cup of coffee. Others can’t abide the idea. They need a nighttime workout to rid themselves of the day’s stresses.
Does it make a difference? Several recent studies suggest that it does. But it’s complicated.
One recent paper indicates that morning exercise may activate certain genes in the muscle cells, boosting their ability to metabolize sugar and fat. While scientists say this finding requires further study, they think it ultimately might help those who are overweight or suffering from Type 2 diabetes.

TAGS: Culture, Biochemistry, Biology, Metabolism

Spring CEO Call Focuses on Universal Flu Vaccine, Heart Repair, and Malaria
Spring CEO Call Focuses on Universal Flu Vaccine, Heart Repair, and Malaria

https://www.weizmann-usa.org/news-media/feature-stories/spring-ceo-call-focuses-on-universal-flu-vaccine-heart-repair-and-malaria/

Apr 12, 2018... On April 11, 2018, American Committee supporters from across the country tuned in for CEO Marshall S. Levin's most recent conference call focused on “Science at the Leading Edge: Latest Breakthroughs from the Weizmann Institute of Science.”
As one of the deadliest flu seasons comes to a close, Mr. Levin informed the audience that Weizmann scientists have developed a universal flu vaccine that may provide full protection from all strains of the virus. The vaccine is now in late-stage clinical trials.

TAGS: Community, Medicine, Biology, Virus, Philanthropy, Leadership

Regenerative Medicine Study Underscores Lung Generation Capacity
Regenerative Medicine Study Underscores Lung Generation Capacity

https://www.weizmann-usa.org/news-media/in-the-news/regenerative-medicine-study-underscores-lung-generation-capacity/

Apr 28, 2015... In diseases like cystic fibrosis, the lungs undergo constant healing and remodeling due to chronic infections. To better understand the repair mechanisms the lungs go through in diseases like CF and COPD, scientists have paid great attention to studying cellular regeneration. Scientists at the University of Pennsylvania and Duke University have discovered that mature lung cells have the ability to repair and differentiate into other types of cells found in the lungs. The primary author, Dr. Rajan Jain, published his findings earlier this month in Nature Communications.

TAGS: Biology

Israeli Scientists Grow ‘Tiny Brains’ to Study How Its Folds Are Created
Israeli Scientists Grow ‘Tiny Brains’ to Study How Its Folds Are Created

https://www.weizmann-usa.org/news-media/in-the-news/israeli-scientists-grow-tiny-brains-to-study-how-its-folds-are-created/

Feb 20, 2018... 11 days of brain research at the Weizmann Institute of Science, Israel.
Israeli researchers have managed to grow tiny model brains in the lab to discover how the brain’s convolutions are created.
A normal brain is as wrinkly as a walnut. And in cases where a person is born with a smooth brain, devoid of folds, he faces severe developmental difficulties.
It has long been known that these folds and wrinkles are meant to enable the brain to be compressed into the space of a skull, and that they develop in embryo. But the question of how they develop, biologically and physically, has preoccupied brain researchers for years, as has the no less important question of what causes problems to arise in this process.

TAGS: Brain, Biology, Physics, Molecular genetics, Evolution, Stem cells

Weizmann Institute Scientists Discover a Key Player in Embryonic Muscle Development
Weizmann Institute Scientists Discover a Key Player in Embryonic Muscle Development

https://www.weizmann-usa.org/news-media/news-releases/weizmann-institute-scientists-discover-a-key-player-in-embryonic-muscle-development/

Apr 11, 2007... REHOVOT, ISRAEL—April 11, 2007—Muscle fibers are large cells that contain many nuclei. They begin, like all animal cells, as naive embryonic cells. These cells differentiate, producing intermediate cells called myoblasts that are now destined to become muscle. New myoblasts then seek out other myoblasts, and when they find each other, they stick together like best friends. In the final stage of muscle fiber development, the cell membranes of attached myoblasts open up and fuse together, forming one large, unified cell.

TAGS: Biology, Molecular genetics, Evolution, Stem cells, Proteins

Stem Cell Reprogramming Made Easier
Stem Cell Reprogramming Made Easier

https://www.weizmann-usa.org/news-media/news-releases/stem-cell-reprogramming-made-easier/

Sep 18, 2013... REHOVOT, ISRAEL—September 18, 2013—Embryonic stem cells have the enormous potential to treat and cure many medical problems. That is why the discovery that induced embryonic-like stem cells can be created from skin cells was rewarded with a Nobel Prize in 2012. But the process of creating such cells has remained frustratingly slow and inefficient, and the resulting stem cells are not yet ready for medical use. Research in the lab of the Weizmann Institute of Science’s Dr. Jacob (Yaqub) Hanna, which appears September 18 in Nature, dramatically changes that: He and his group have identified the “brake” that holds back the production of stem cells, and found that releasing this brake can both synchronize the process and increase its efficiency from around one percent or less today to 100 percent. These findings may help facilitate the production of stem cells for medical use, as well as advancing our understanding of the mysterious process by which adult cells can revert back into their original, embryonic state.

TAGS: Medicine, Biology, Stem cells, Proteins

Faster Metabolism Makeover: Nurturing Your Gut Bacteria
Faster Metabolism Makeover: Nurturing Your Gut Bacteria

https://www.weizmann-usa.org/news-media/in-the-news/faster-metabolism-makeover-nurturing-your-gut-bacteria/

Oct 11, 2017... You're not alone! Right now, you've got 100 trillion bacteria living in your digestive system. Most of us are familiar only with these tiny critters' embarrassing habit of releasing smelly gas at the wrong moments, but the truth is, your gut bugs are intimately involved with your weight. There's growing evidence that the right mix of bacteria in your intestines can help you make healthier food choices and stay slim, while the wrong mix encourages weight gain and a taste for junky processed foods.

TAGS: Biology, Nutrition, Metabolism

Israeli Woman is ""Europe's Top Young Researcher""
Israeli Woman is ""Europe's Top Young Researcher""

https://www.weizmann-usa.org/news-media/in-the-news/israeli-woman-is-europe-s-top-young-researcher/

Mar 28, 2012... Courtesy Lam Velitz Studios
Multinational cosmetics firm L’Oreal and UNESCO have named a Weizmann Institute biologist working in the field of probiotics, commonly referred to as beneficial bacteria, “Europe’s top young researcher.” For her work in researching probiotics to treat disease, Dr. Naama Geva-Zatorsky will receive a two-year $40,000 postdoctoral scholarship.
During the past three years, young Israeli women have been able to apply for the program, which began 14 years ago and aims at promoting research among women starting out their scientific careers. There are only 15 annual fellowship winners around the world.

TAGS: Awards, Women, Education, Biology, Immune system, Bacteria

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