Bird Flu Virus Mutating into Human-Unfriendly Form
October 4, 2007 08:37 PM - Maggie Fox, Health and Science Editor
NEW YORK (Reuters) - The H5N1 bird flu virus has mutated to infect people more easily, although it still has not transformed into a pandemic strain, researchers said on Thursday.
The changes are worrying, said Dr. Yoshihiro Kawaoka of the University of Wisconsin-Madison.
"We have identified a specific change that could make bird flu grow in the upper respiratory tract of humans," said Kawaoka, who led the study.
"The viruses that are circulating in Africa and Europe are the ones closest to becoming a human virus," Kawaoka said.
Bird Flu Virus "More Invasive Than Thought'
October 4, 2007 08:07 PM - Jia Hepeng, SciDevNet
BEIJING - The post mortems of two people who died after H5N1 infection have revealed that the virus infects more human organs than previously thought. The study was published in The Lancet. Lead author Gu Jiang, a professor at the School of Basic Medical Sciences of the Beijing-based Peking University, and colleagues studied post-mortem tissues of one man and one pregnant woman, and also tested the foetus of the woman.
India's Tsunami Warning Center Up And Running
October 4, 2007 07:49 PM - T. V. Padma, SciDevNet
HYDERABAD - India's tsunami warning center in Hyderabad became operational this week, less than three years since the country's southern coast was devastated by the Asian tsunami.
The $314 million dollar center, located at the Indian National Centre for Ocean Information Services, is now operating 24 hours a day, seven days a week. It receives data via satellite from six ocean buoys — four in the Bay of Bengal and two in the Arabian Sea — equipped with water pressure sensors to detect any rise in water levels. Six more back-up buoys will be ready in the next two months.
Study: Vitamin C Essential For Plant Growth
October 4, 2007 07:38 PM -
University of Exeter - Scientists from the University of Exeter and Shimane University in Japan have proved for the first time that vitamin C is essential for plant growth. This discovery could have implications for agriculture and for the production of vitamin C dietary supplements.The study, which is published in The Plant Journal, describes the newly-identified enzyme, GDP-L-galactose phosphorylase, which produces vitamin C, or ascorbate, in plants. Vitamin C is already known to be an antioxidant, which helps plants deal with stresses from drought to ozone and UV radiation, but until now it was not known that plants could not grow without it.
Gamma Ray Delay, Sign of 'New Physics' Beyond Einstein
October 4, 2007 06:58 PM -
Davis California - Delayed gamma rays from deep space may provide the first evidence for physics beyond current theories.
The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescope found that high-energy photons of gamma radiation from a distant galaxy arrived at Earth four minutes after lower-energy photons, although they were apparently emitted at the same time. If correct, that would contradict Einstein's theory of relativity, which says that all photons (particles of light) must move at the speed of light.
How 'Mother of Thousands' Makes Plantlets
October 4, 2007 06:48 PM - Paul Schaefer, ENN
Davis, California - New research shows how the houseplant "mother of thousands", a plant officially called "Kalanchoe diagremontiana" makes the tiny plantlets that drop from the edges of its leaves. In an amazing twist of evolution, this houseplant, having lost the ability to make viable seeds, shifted some of the processes that make seeds to the leaves, said Neelima Sinha, professor of plant biology at UC Davis.
Scientists 'Weigh' Tiny Galaxy Halfway Across the Universe
October 4, 2007 06:40 PM - Paul Schaefer, ENN
Santa Barbara, California - Researchers have 'weighed' a galaxy halfway across the universe, six billion light years away, and took a razor sharp image of it to boot. How did they do that? The scientists used a phenomena of nature in deep space and specialized processing techniques on data collected by NASA's Hubble Space Telescope and the W. M. Keck Observatory in Hawaii. This galaxy is about half the size and a tenth the "weight" of the smallest distant galaxies typically observed. It's 100 times lighter than our own Milky Way.
CU Researchers Shed Light on Light-Emitting Nanodevice
October 4, 2007 08:23 AM - Cornell University
An interdisciplinary team of Cornell nanotechnology researchers has unraveled some of the fundamental physics of a material that holds promise for light-emitting, flexible semiconductors. The discovery, which involved years of perfecting a technique for building a specific type of light-emitting device, is reported in the Sept. 30 online publication of the journal Nature Materials. The interdisciplinary team had long studied the molecular semiconductor ruthenium tris-bipyridine.
Make Hay (and a lot more) While The Sun Shines
October 4, 2007 08:19 AM - MIT
A team of MIT students, faculty and volunteers has taken on the challenge of designing and building a house that relies entirely on solar energy to meet the electricity needs of a typical American family, from drying towels to cooking dinner. MIT's off-grid home, known as Solar7, is en route to the capital now. Designed and built at MIT on an asphalt lot at the corner of Albany and Portland Streets in Cambridge, Solar7 was broken into modules and sent off by flatbed truck.
Ice Age Sabertooth Was a Pussy Cat
October 4, 2007 07:55 AM - Reuters
SYDNEY - The Ice Age sabertooth, with its large protruding fangs, was actually a bit of a pussycat, according to Australian scientists who studied the power of its bite and hunting skills. While most people rank the sabertooth alongside the Tyrannosaurus rex dinosaur as a killing machine, in reality today's lions are far more powerful, the study found. Using the skull of a modern-day lion for comparison, a team of scientists at the University of New South Wales (UNSW) found the sabertooth had a relatively weak bite. In fact, its bite was about one third as powerful as a lion.