Longer-lived rodents have lower levels of thyroid hormone
... levels of T3 and T4 for each animal. T4 levels vary the most T4 levels varied significantly between all of the groups, with the shorter-lived groups having higher levels of T4 than longer-lived groups. The mice, for example, had twice as much T4 as the Damara mole-rats and had and three times more ...Early family experience can reverse the effects of genes, UCLA psychologists report
...r than predicting risk for depression, its effects vary substantially, depending on how supportive the external environment is, Taylor said. These conclusions were bolstered by parallel evidence collected by the team showing that a supportive environment reduced the risk of depression among those with t...Columbia University awards 2006 Horwitz Prize to biologist who explained gene transcription
...t differently. Normal skin, blood and brain cells vary from each other because each uses a different assortment of genes that are turned on and off at precise moments. Disease often occurs when genes are turned on or off at the wrong moments, so a better understanding of what controls gene expression may...NSET releases document: EHS research needs for engineered nanoscale materials
...rger scales. At the nanoscale, material properties vary as the function of size, which not only enables new benefits, but also may lead to health and environmental risks. That a technology could offer both benefits and, at the same time, potential risk is not unique to nanotechnology. Other common examp...Ecological change, climate variation addressed at international conference, September 20-24
... Plant community responses to nitrogen enrichment vary Nitrogen deposition, a result of fossil fuel combustion and agricultural runoff, is increasingly affecting natural areas. To understand how plant communities are altered, a group of researchers synthesized data from nitrogen fertilization experimen...DOE JGI, VBI describe disease mechanisms of sudden oak death, related soybean pathogens
...iagnostically different single-letter changes that vary among strains of the disease," said Jeffrey Boore,...s about the pathogen to an all-time high. Symptoms vary depending on the host. Infected oak trees exhibit oozing cankers on the trunk, and often succumb to...Study shows prenatal diagnostic tests have low risk of miscarriage
...volume of procedures. Because rates of miscarriage vary with experience of the providers, the results may not be applicable in all situations. ...Comparative Environmental Politics
... McBeath and Rosenberg, look at the ways countries vary politically and assess the impact on responses to global environmental issues such as climate change, biodiversity loss, deforestation, and trans-boundary air pollution. Their work explores five major topics: state-society relations; environmental...Being obese and a couch potato may have a biological basis in the brain
... Contrary to common belief, metabolism rates don't vary greatly from person to person and weight gain usually results from eating too much, burning too few calories, or both, she said. The researchers drew their conclusions after performing a series of experiments with obesity-prone and obesity-resistan...Other highlights in the August 2 issue of JNCI
...cross all racial and ethnic groups, and it did not vary by marital status. However, different health centers had substantially different enrollment rates. They write, "Focused efforts to understand how patients, physicians, and hospices interact at the local level are important to ensure equal access to...Viral genetic differences are possible key to HIV dementia
...host cells. "That's the gene that's most likely to vary between tissues, because it evolves rapidly and allows the virus to dock with different cell types," Pillai says. According to Pillai, an analysis of the sequence data suggests that HIV is "genetically compartmentalized" between the central nervou...When biology gets 'Quirky,' scientists turn to math
...ew biochemical agents, this means that results can vary widely from experiment to experiment. Martin Feinberg and his colleagues wanted to know why. Through computer simulations, they discovered that the answer -- mathematically, at least -- could come down to the rate at which chemicals enter a cell....Tips from the journals of the American Society for Microbiology
...ed some were found more frequently and appeared to vary according to packaging conditions. Rahnella aquatilis, Rahnella spp., Pseudomonas spp., and Carnobacterium divergens were prominent in the air packaging method, Pseudomonas spp. and Lactobacillus sakei were found in packaging high in oxygen content,...Brain-computer link lets paralyzed patients convert thoughts into actions
...ulky and cumbersome. The quality of the signal can vary from patient to patient and from day to day. A great deal of work remains to be done to extend the longevity and reliability of the sensor. Patient two never developed as much control as Nagle, and even Nagle's level of control, the authors note, "is...UCLA study finds same genes act differently in males and females
...viously had no good understanding of why the sexes vary in their relationship to different diseases," explained Xia Yang, Ph.D., first author and postdoctoral fellow in cardiology at the David Geffen School of Medicine at UCLA. "Our study discovered a genetic disparity that may explain why males and fema...Corals switch skeleton material as seawater changes
...eals that corals are far more flexible and able to vary at least a portion of their skeleton to growth favored by seawater chemistry. He postulates that this "mineralogical flexibility" provides corals with an "evolutionary advantage," as it would take more energy for corals to produce skeletons that are ...Life cycle of operons yields new look at bacterial genetics
...ns. Genes that are placed together in operons can vary widely across different types of microbes. Also, genes that are in the same operon in one bacterium are often found in different operons in other bacteria. The diversity of operon structures, which affects the regulation of gene expression, has been ...Genes linked to daily flux in drug toxicity
...d: sensitivities to chemotherapies and other drugs vary over the course of a day, Schibler agreed. Although rigorous clinical study is needed, patient outcomes might therefore be improved in some cases by delivering chemotherapies, or perhaps other drugs, in accordance with the circadian rhythm. "Even i...Genetic parallels found between lung development and lung cancer
...eatment. In addition, cancers within a subtype may vary in their aggressiveness. Seeking a better way to classify lung cancers, Hongye Liu, PhD, and colleagues in the Children's Hospital Informatics Program (CHIP) examined gene activity in tumors from 186 patients and compared it with the gene activit...Study shows lack of national consensus on teaching K-12 students about human-environmental impacts
...t impacts humans and society--but support for both vary widely throughout the country. Moreover, in most states there is minimal or no support in the standards for teaching about the ways in which individual actions affect the environment. "I do think that K-12 students should study interactions between...