Study shows our ancestors survived 'Snowball Earth'
...t the oxygen in the atmosphere in the first place, apparently were pumping out oxygen for millions of years before that, and also survived Earth's glaciation. The findings call into question the direst models of just how deep the deep freeze was, said University of Washington astrobiologist Roger Buick, a profe...Leptin found to control appetite and limb development in frogs
... watched what happened. As in mice, the hormone is apparently a powerful appetite suppressant for these animals,...e of turning the feeding behavior off, but it does apparently tell their bodies that they've had enough to eat now, and they can begin sprouting limbs. "Leptin g...News tips from The Journal of Neuroscience
...on a myelinating phenotype, and some proliferated, apparently in response to axon-derived cues. YFP-labeled, SKP-derived Schwann cells, transplanted into the sciatic nerve or brain of shiverer mice, also successfully myelinated axons. Significantly, naive human SKPs transplanted into injured peripheral nerve ...New method of testing eggs for abnormalities could solve problems of embryo freezing
...ompleted within three hours and a maximum of three apparently normal eggs were inseminated by intra-cytoplasmic sperm injection (ICSI) before being cultured and transferred to the women. In the other 244 cases, the researchers used the conventional criteria of choosing eggs that appeared, on close external insp...CHAVI announces international search for genes affecting HIV response
...al Center. Despite repeated exposures, some people apparently never become infected with HIV. Among those who become infected, there is dramatic variation in how the body responds to HIV and in how long it takes for infection to progress to AIDS. EuroCHAVI scientists will try to understand these differences by ...Medium is the message for stem cells in search of identities
...tem cells, prized for their astonishing ability to apparently transform into any kind of cell in the body, acqui...iently appearing and disappearing, these molecules apparently cordon the brain into different regions. If molecules from the matrix activate genes in stem cells...Discovery of genetic mutation in Florida beach mice suggests extinct mammoth had light and dark fur
...through different genetic mechanisms. "There is apparently more than one way genetically to become a light-colored beach mouse," says Hoekstra. Other genes also contribute to the differences in the coat patterns among the mice. But, concedes Hoekstra, "We know very little genetically about how coat patter...UCR researchers determine genetic origin of California wild radish
...called jointed charlock. The hybrid-derived plants apparently have completely eliminated the ancestral species from California, the researchers report. The discovery is significant because the parental species were replaced by asingle, stable hybrid lineage in less than 100 years, an extremely shortinterval ...Scientists identify protein with a crucial role in cell death
... are able to convert oxygen into energy, they have apparently lost their protection against apoptosis, and so the cells die off more quickly. Therefore, PARL plays a crucial role in the cells' dying off process and, consequently, probably also in the origin of diseases of ageing, like Parkinson's disease....Molecular DNA switch found to be the same for all life
...cal cell divides into two identical daughter cells apparently worked so well early on that evolution has conserved it across the eons in all forms of life on Earth. Researchers with the U.S. Department of Energy's Lawrence Berkeley National Laboratory and the University of California at Berkeley have shown that...The more alcoholic relatives a person has, the more they need to drink to feel alcohol's effects
...aid Hesselbrock. "FH, on the other hand, does not apparently influence usual consumption levels but does contribute to the susceptibility for developing alcohol problems in adulthood. Why is this important?," he asked. Because of its potential for intervention, and even prevention, he answered. "While we ...Marine 'dead zone' off Oregon is spreading
...rthwest appears to have begun, scientists say, and apparently is expanding its scope beyond Oregon waters. This year for the first time, the effect of the low-oxygen zone is also being seen in coastal waters off Washington, researchers at OSU and the Olympic Coast National Marine Sanctuary indicate. There hav...Special Science issue examines HIV/AIDS in Latin America and the Caribbean
... 1996 and 2002, AIDS mortality dropped 50 percent, apparently because of the use of antiretroviral drug cocktails. The government says it saved 90,000 patients from death as well as $1.2 billion that would have been spent on hospitalization and treatment of opportunistic infections. Argentina , where the epi......ow Tree, but accumulation of insect herbivores has apparently reduced this benefit over time. Contact: Dr E Siemann Rice University 001 713-348-5954 siemann@rice.edu Modelling the initial spread of foot-and-mouth disease through animal movements by Dr DM Green, Dr IZ Kiss and Dr RR Kao (doi:10.1098...Stress imaging tests predict prognosis of heart disease in obese persons
...e possible by using technetium-labeled agents--has apparently resulted in improved detection of coronary artery disease in obese patients," said Abdou Elhendy, an associate professor of medicine in the cardiology section at the Marshfield Clinic in Marshfield, Wis. "This can be helpful for physicians in plannin...UW-Madison research part of international mercury conference
...ed the Fox River - possibly from industrial uses - apparently binds very tightly to sediment particles, and this has obstructed the methylation process in parts of the Fox River and in portions of Lower Green Bay. CONTACT: James Hurley, (608) 262-1136, hurley@aqua.wisc.edu...Finding paves way for better treatment of autoimmune disease
...pically mixes with water, prefers alcohol. It's an apparently lethal choice for the signaling molecule that, in turn, also kills T cells that need phospholipase D to survive. Previously, it was unknown whether regulatory T cells required the molecule. "What we have found is that if you block this enzyme, almo...Contagious cancer in dogs confirmed; origins traced to wolves centuries ago
...added. CTVT, also known as Sticker's sarcoma, is apparently transmitted among dogs through sexual contact but ...rest due to the recent emergence of a facial tumor apparently transmitted by the bite of the Tasmanian devil, an endangered marsupial species, he added. In the ...Life and death in the hippocampus: what young neurons need to survive
...or connections between young and mature neurons is apparently more than just a spectacle designed to keep Mother Nature amused: the fact that enhanced learning is correlated with adult neurogenesis suggests constant rearrangements within neural networks are absolutely necessary for learning to occur. In fac...Study will explore genetics of congenital limb and heart malformations
... particular shaping of the limbs and heart. LMP4 apparently regulates Tbx protein activity in the cell by keeping the Tbx transcription factors bound to the actin cytoskeleton or releasing them to the nucleus. Actin is a contractile protein of muscle and is a major component of the cytoskeleton the "scaffold...