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Life Sciences
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Written by xScience.Info
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Wednesday, 14 March 2007 |
Hyperactive antifreeze proteins naturally secreted by an insect
known as the spruce budworm, prevent it from freezing to death
during winters in North American forests. Ohio University's Ido
Braslavsky and his colleagues
presented studies of these potent yet nontoxic proteins at this
week’s APS Meeting.
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Life Sciences
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Written by xScience.Info
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Thursday, 08 March 2007 |
 The propagation of a nerve pulse. Credit: Thomas Heimburg, Ph.D., Niels Bohr Institute Danish scientists challenge the accepted scientific views of how nerves function and of how anesthetics work. Their research suggests that action of nerves is based on sound pulses and that anesthetics inhibit their transmission. |
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Life Sciences
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Written by xScience.Info
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Friday, 26 January 2007 |
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Two scientists from the University of Copenhagen and one from the University of Vilnius have demonstrated that the spinal cord uses network mechanisms similar to those used in the brain. The discovery is featured in the current issue of Science ( Berg et al., Science 315: 390-393)
The research group behind the surprising results consists of Professor Jørn Hounsgaard and Post.doc Rune W. Berg from the University of Copenhagen, and Assistant Professor and PhD Aidas Alaburda from the University of Vilnius. The group has shown that spinal neurons, during network activity underlying movements, show the similar irregular firing patterns as seen in the cerebral cortex. |
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Life Sciences
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Written by xScience.Info
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Wednesday, 20 December 2006 |
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Want biodiversity? Look no further than the air around you. It could be
teeming with more than 1,800 types of bacteria, according to a
first-of-its-kind census of airborne microbes recently conducted by
scientists from the U.S. Department of Energy’s Lawrence Berkeley
National Laboratory (Berkeley Lab). The team used an innovative DNA test to catalog the bacteria in air
samples taken from the Texas cities of San Antonio and Austin.
Surprisingly, they found a widely varied bacterial population that
rivals the diversity found in soil. They also found naturally occurring
relatives of microbes that could be used in bioterrorist attacks —
although many of these relatives are harmless.
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Experimental Methods and Techiques
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Written by xScience.Info
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Wednesday, 13 December 2006 |
In 1670 Isaac Newton demonstrated the composite
nature of sunlight when he sent a carefully collimated sunbeam
through a prism, which spread out the light into a rainbow of
colors; by sending a beam of single color through a second prism
(with no further spreading) Newton showed that the color was not
being imposed by the prism but was intrinsic to the light itself.
Now physicists using the Advanced Photon Source at Argonne National
Lab, in Illinois, have spread out a beam of X-rays (which are, after all, just a
more energetic version of visible light) into a rainbow of colors.
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