Constant lighting may disrupt development of preemies' biological clocks
...our mood," McMahon said. "This study suggests that cycling the lights in NICUs may be better than constant lighting for premature babies' from the perspective of developing their internal clocks." Every year about 14 million low-weight babies are born worldwide and are exposed to artificial lighting in hos...Rehydrate -- your RNA needs it
...a static structure, a ribozyme also changes shape, cycling back and forth between active and inactive forms (called conformations). In earlier work, a team led by U-M's Nils Walter, associate professor of chemistry, found that modifications made anywhere on the ribozyme molecule---even far from the site w...Iron critical to ocean productivity, carbon uptake
... The researchers are creating new models of carbon cycling using NASA satellite imagery which they have calibrated using their ship-based measurements of fluorescence. The role of the ocean in the global carbon cycle is critical and nowhere is it more pronounced than the tropical Pacific Ocean. As phytoplan...Harvard scientists identify compounds that stimulate stem cell growth in the brain
...B4 up-regulated several molecules involved in cell cycling and growth, such as cyclins and epidermal growth factor receptor, and decreased those such as caspase 8 which play a role in apoptosis. LXA4 had the opposite effects....Dinosaurs' climate shifted too, reports show
...tures shifted erratically due to changes in carbon cycling and did so without human input. "Combined with d...e geochemists found evidence for changes in carbon cycling and in nitrogen fixation by ocean biological communities associated with changing climate. A special...UCR-led research team receives $5 million grant to study interaction of ecology and evolution
...f resources or how many predators there are or the cycling of essential nutrients, can exert new evolutionary pressures on the guppies at the same time that the evolution of guppies causes changes to the ecosystem. Questions about how organisms - including humans - evolve or why communities have certain prop...Histamine tied to changes in blood pressure during exercise-recovery period
...vered a pre-exercise period, a 60-minute ride on a cycling machine and a 90-minute recovery period. The participants were all non-smokers without blood pressure problems and between the ages of 19 and 34. The group given the histamine blockers consumed them with water 60 minutes before beginning the exercise...UGA scientists discover bacterial 'switch gene' that regulates oceans' sulfur emissions into the air
...ed. "We knew bacteria played a key role in the cycling of marine sulfur, but the discovery of this gene allows us to pinpoint how and when bacteria control this process," she said. This flow provides a key feedback loop in theories of global climate regulation for which biotic processes are central eleme...Resilient form of plant carbon gives new meaning to term 'older than dirt'
...ld even influence current predictions about carbon cycling and soil carbon storage in response to increasing amounts of carbon dioxide in the atmosphere, the co-authors conclude....A chilling solution: Measuring below-ground carbon without destroying trees
...ystems. Reliable data has been developed on carbon cycling in the above-ground processes of trees, but how much carbon is actually moved and stored below the ground has still not been determined. Most methods to study below-ground processes involve destroying the roots as well as the mycorrhizal communities ...From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea
...ge part because of their potentially vital role in cycling the global supply of nitrogen. All living things need nitrogen to make proteins, DNA and other biomolecules. Nearly 80 percent of the atmosphere consists of nitrogen gas, which, unlike oxygen, cannot be absorbed by most organisms. Getting usable nitr...Rotting leaf litter study could lead to more accurate climate models
...scovered that this fundamental process of nutrient cycling by plants and microbes turns out to be relatively ... of the study. "There are a lot of global nutrient cycling models out there, but the model we've developed is based on only two parameters, and thus is more sc...Linheng Li Lab documents the development of cancer stem cells
...e population in the tumor mass; that they are slow cycling but more active than normal stem cells; and that cancer stem cells and stromal insertions initiate the process of primary tumorigenesis -- will be influential in our future work." "Findings from the Li Lab create opportunities to further character...Rats on a road trip reveal pollution-heart disease risk
...d to air pollution while riding in a bus or car or cycling to work were more likely to suffer a heart attack within one hour of their morning commute. Rochester researchers placed aged hypertensive rats in a mobile laboratory for six hours on Interstate 90 in western New York for a total of 320 miles. The ...AGU Journal highlights -- February 23, 2007
...g the day and cools off more rapidly at might. The cycling of cold and warm air creates rotating pockets of high and low pressures, forming a circulation cell that propagates both onshore and offshore. Hunter et al. studied SLB circulation using data collected from February through May 2005 on the Hudson Riv...News tips from the Journal of Neuroscience
...486 had no effect on GABA A subunit expression in cycling mice. However, finasteride, which inhibits synthesis of neurosteroids from progesterone, prevented upregulation of the d subunit and blocked the enhancement of GABA A receptor-mediated tonic inhibition that normally occurs during diestrous. Similar ...The global carbon budget -- proper accounting means paying attention to inland waters
...climate change. On Earth, carbon is continually cycling through terrestrial systems, inland waters, the ocean, and the atmosphere. Until little over a decade ago, when calculating the terrestrial component of the global carbon budget, inputs were limited to the ocean and the land. Because inland water bod...AGU Journal Highlights -- April 16, 2007
...face waters with groundwater influences the global cycling of both natural substances, such as nutrients, and human-made toxins that can affect aquatic ecosystems. However, it is often challenging to characterize subsurface water flow paths, which differ markedly in length, depth, and flow duration. Noting t...Puzzling plankton yield secrets to role in evolution/global photosynthesis
...hlights their critical role in managing the global cycling of carbon. These findings, by a group led by the DOE Joint Genome Institute (DOE JGI); the Scripps Institution of Oceanography, University of California, San Diego; and the Pierre & Marie Curie University, were published this week in the Proceedings......: how the beat goes on In the normal heart, the cycling of intracellular calcium in cardiac muscle cells is critical to the hearts mechanical contraction and relaxation. Mutations in calcium-handling proteins in the heart have been linked to exercise-induced sudden cardiac death. The best characterized of...