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Showing results 51-61 of 181 for 'Biology'

  • Birth of an Enzyme

    Scientists from the Weizmann Institute and the University of Washington, Seattle, successfully created a new type of enzyme for a reaction for which no naturally occurring enzyme has evolved.

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    Time to Eat

    Dr. Gad Asher and colleagues found that mitochondria (which give cells power) are regulated by the body's circadian clocks; in fact, mice who ate only when active had 50% lower liver lipids. The findings help explain why people who eat out of phase with their circadian clocks are more likely to develop obesity, diabetes, and metabolic syndrome.

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    Blast of Thin Air Can Reset Circadian Clocks

    The low pressure in airplanes can make traveling unpleasant – but it could also ease jetlag, finds Dr. Gad Asher. Every cell in the body contains a circadian clock, and when these clocks are disrupted, imbalances result. Dr. Asher's findings could affect how airlines moderate cabin pressure. He and his team are now seeking ways to help travelers.

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    Why do Female Mice Attack Others' Pups? Blame it on Pheromones

    Lab mice lose many of their natural traits; e.g., lab females will care for others' pups, unlike their wild cousins. Dr. Tali Kimchi has developed a model that lets her explore, for the first time, the biological roots of aggressiveness in females, particularly toward pups, and found that pheromones are the key. Her work could aid gender-specific drug development.

  • Science Tips, November 2007

    Three research updates from the Weizmann Institute of Science: smelling sweat; explaining the link between genetic repeats and diseases; and how the immune system checks the identity of cells.  

  • Science Tips, April 2011

    Three research updates from the Weizmann Institute of Science: why the ""aha!"" moment is important; an enzyme that can enhance memories; and how quantum mechanics principles of spin relate to biology.

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    Nobel Prize in Chemistry 2013

    In the 1960s, Arieh Warshel and Michael Levitt were scientists at the Institute when they developed a computer program to model large biological molecules. Now, along with colleague Martin Karplus, they have received the 2013 Nobel Prize in Chemistry ""for the development of multiscale models for complex chemical systems.""

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    Stem Cell Reprogramming Made Easier

    Reprogramming adult stem cells so that they are like embryonic stem cells, and thus have the ability to become any type of cell we like, has the potential to change medicine; however, the reprogramming process is inefficient and impractical. Now, Dr. Yaquob Hanna has found that removing one protein changes everything.