Key molecule in plant photo-protection identified
...o chemical energy at an energy transfer efficiency rate of approximately 97 percent. If scientists can create artificial versions of photosynthesis, the dream of solar power as a clean, efficient and sustainable source of energy for humanity could be realized. A potential pitfall for any sunlight-harvest...New evidence indicates biggest extinction wasn't caused by asteroid or comet
..., and the other for a sharp increase in extinction rate at the boundary that then lasted another 5 million years. The scientists said they found nothing in the Karoo that would indicate a body such as an asteroid hit around the time of the extinction, though they looked specifically for impact clays or m...Priming embryonic stem cells to fulfill their promise
...bined in one niche, the liver cell differentiation rate was subtly inhibited. "You would not predict that from the customary cell biology experiments," said Bhatia. "By using this combinatorial technique we were surprised to find many interesting interactions, and we were able to tease out the effects of ...Lack of enzyme turns fat cells into fat burners
...s, the ACC2-deficient mice had a 25 percent higher rate of fatty acid oxidation and twofold higher rate of glucose oxidation than the normal mice. Others who participated in the research included Drs. Wo...Theory on evolution of essential genes is overturned by new finding
...ub-groups. Using statistical information about the rate at which genes evolve, the researchers worked out that the gene was only about 1-2 million years old, and much younger than the majority of the genes in the remainder of the fruit fly genome. This finding, that an essential gene has a relatively rece...First view of a world without fire
... attempts, through the Kyoto protocol, to slow the rate of carbon dioxide increase in atmosphere. Human influences on fire are near universal. We suppress fires in some regions and ignite them in others. However the fire-maintained ecosystems identified in our research have been burning for millions of ye...Media fellowship on autism available at Vanderbilt University
...Tenn. Autism diagnoses are growing at the alarming rate of 10 to 17 percent per year, according to the U.S. Department of Education and other federal agencies. It is estimated that the number of Americans diagnosed with autism, 1.5 million in 2004, could reach 4 million by 2010. The spike in diagnoses, ad...Racial groupings match genetic profiles, Stanford study finds
...ked at the beginning of the study. That's an error rate of 0.14 percent. According to Neil Risch, PhD, a UCSF professor who led the study while he was professor of genetics at Stanford, the findings are particularly surprising given that people in both African-American and Hispanic ethnic groups often hav...How many comparative genomes are enough?
...er any given nucleotide is conserved with an error rate of less than 1 in 100. But this estimate does not ...t necessarily stay the same but evolve at a slower rate than nucleotides that are not conserved. The model finds, in accordance with previous results, that...A bug's life: aging and death in E. coli
...ing old poles had a reduced growth rate, decreased rate of offspring formation, and increased risk of dying compared with the cells inheriting new poles. Thus, the "old pole" cell is effectively an aging parent repeatedly producing rejuvenated offspring. Stewart and his colleagues conclude that no life s...'Man the Hunter' theory is debunked in new book
...ertooth cat fangs fit, says Sussman. The predation rate on savannah antelope and certain ground-living monkeys today is around 6 percent to 10 percent as well. Sussman and Hart provide evidence that many of our modern human traits, including those of cooperation and socialization, developed as a result o...Bayou blues: Working to save the US from the worst potential oil, gas and fishing crisis
...last few years that we have gotten a handle on the rate of subsidence. We're starting to get a better idea of how this happens and how fast these things happen over time. The wetlands around New Orleans are so degraded that they provide little or no protection against large storms," Reed said. "Only a ...NJIT hosts Spring Career Fair: Employers expected to increase hiring...
...or of career services at NJIT. "The fastest growth rate of employment opportunity during the last nine months has been in computer engineering. Students graduating with that major have promising job outlooks." To register for the career fair, please go to www.njit.edu/CDS , or call (973) 596-3646. Repo...Cricket's finicky mating behavior boosts biodiversity
...a female cricket on? Why does she prefer one pulse rate over another? Whatever the reason, it's very impor... thumbnail-sized Laupala spawns new species at the rate of 4.17 every 1 million years, or more than 10 times faster than the average speciation rate for inv...New stem cell source could boost bone marrow success
...ure that currently has a 30 to 40 per cent success rate in treating disease. Professor John Davies of U of T's Institute of Biomaterials and Biomedical Engineering (IBBME) and the study's lead author, says that the cells around the vessels human umbilical cord perivascular (HUCPV) cells were often di...Hypertension in African Americans linked to two genomic regions
...ier and more severe hypertension and have a higher rate of death from stroke, heart disease, and kidney failure as a result. The causes of hypertension are complex. Diet, exercise and stress contribute, but so do genetic factors. "It wouldn't be surprising if hypertension involved dozens of genes," says D...New system can measure productivity of oceans
...ut until now, it was impossible to determine their rate of growth on any broad, useful scale. The new fin... until now, we've never been able to measure their rate of production over large areas." That production can be enormous, and highly variable. Phytoplankton...JCI Table of Contents, March 1, 2005
...there has been a lack of information regarding the rate of production of CLL cells, and the time-course of...study shows that leukemia cells are born at a fast rate and do indeed die. The slow rise in the cell count over time can be attributed to the difference bet...Scientists disprove two tenets of common leukemia
..., found that the leukemia cells are born at a fast rate and do indeed die. The slow rise in the cell count...rth rates of the leukemia cells, regardless of the rate of cell death. "This particular finding may prove helpful in identifying patients who are at risk fo......there has been a lack of information regarding the rate of production of CLL cells, and the time-course of...study shows that leukemia cells are born at a fast rate and do indeed die. The slow rise in the cell count over time can be attributed to the difference bet...