Hawaiian soils reveal clues to cultural history
...neath stone walls remaining from that period. "The nutrient status in the field was much less than that under the walls," said Chadwick. "They were depleting the soil; it's the usual result of farming." The researchers believe that the losses continued over time even with augmentation of the sweet spot. The...Nitrogen fertilization of soil puts rare plant species at risk, nationwide study determines
... block of plant and animal proteins, nitrogen is a nutrient essential to all forms of life. But it is possible to have too much of a good thing. Driven by an increase in the use of fertilizers and the burning of fossil fuels, the amount of nitrogen available to plants at any given time has more than doubled s...Anammox bacteria produce nitrogen gas in oceans' snackbar
...gas to form new nutrients that can be fed into the nutrient cycle again. In the article in PNAS, researchers f... microbiological methods involving high resolution nutrient profiles, experiments with stable isotope labeled nutrients, depth profiles of unique membrane lipid...Whale bones and farm soil: Sequencing biodiversity
...n the USA. Sunken whale skeletons are a lipid-rich nutrient source that can foster the growth of a flourishing...which little is known permitting estimates of the nutrient supply in the soil or pollution levels in the sea. The data may also be used as the starting point f...NASA study finds snow melt causes large ocean plant blooms
...g bacteria.These bacteria convert a nitrogen-based nutrient readily consumable byplants in seawater, called nitrate, into forms of nitrogen that mostplants cannot use. One form of nitrogen that plants cannot consume is nitrous oxide, alsoknown as laughing gas. In the atmosphere, nitrous oxide is 310 timesmore...Researchers identify protein crucial for survival of Lyme-disease bacterium
..., Bb bacteria normally utilize blood as their main nutrient source, just as the tick does," said Dr. Michael N...mperature and acidity signal the bacteria that the nutrient is present, triggering the bacteria to replicate in large numbers and migrate to the tick's salivary...Unexpected lock and key mechanism found for the assembly of tumor blood vessels
...proliferation of cancer cells by cutting off their nutrient supply, Varner added. Drs. Varner and Parker are currently in discussions with pharmaceutical companies to test integrin inhibitors in cancer clinical trials at the new Moores UCSD Cancer Center. Varner's colleagues in the study included Barbara Gar...Highlights of the May 2005 Journal of the American Dietetic Association
...more of the University of Iowa studied patterns of nutrient supplementation among nearly 400 young white children as part of a larger study of children's dental health. Parents were asked to fill out food diaries and questionnaires about their children's vitamin and mineral supplement intake beginning at six ...Mechanism for the captation of nutrients in plants- unknown to date
...t showed the existence of processes independent of nutrient captation: a saccharose penetration process independent of "endocitosis" and another dependent on "endocitosis" and which required approximately 90 minutes from the time the cell started to capture saccharose in order to start functioning. That is, f...UQ researcher journeys to the centre of the cell
...re involved in the very first step of particle and nutrient uptake into cells. Cells require a constant flux of nutrients and other chemicals for survival and it is vitally important to understand how these materials reach the inside of the cell. IMB's Professor Rob Parton said that endocytosis, the process...Fat's fate depends on its source
...dy is required to elucidate the mechanism by which nutrient sensors in the body distinguish between different sources of fat, the researchers said....Scientists team up for multiyear studies of microbial mysteries
... information on issues ranging from how energy and nutrient transport occurs between microbes and their environment, to how microorganisms influence Earth's soil and water chemistry, with potential applications that include groundwater remediation, carbon sequestration, and energy generation. EMSL's unique an...Researchers develop assay that could be applied to drug screening
...lar activities including receptor down-regulation, nutrient uptake and maintenance of signal transmission across nerve cell junctions. Mis-regulation of CME has been implicated in some types of cancer and neuro-degenerative disease and the protein machinery of CME has been co-opted by several viruses, includi...Longevity controlled by calorie quality, not quantity
...e same calories per gram, the authors could adjust nutrient composition without affecting the calorie count, allowing them to separate the effects of calories and nutrients. Reducing both nutrients increased the flies' life spans, but yeast had a much greater effect: reducing yeast from control to dietary res...Digging in the dirt for life's biochemical foundations
...ly those related to nitrogen. To learn more about nutrient uptake, MSU researchers led by Shachar-Hill, along with collaborators at New Mexico State University and the U.S. Department of Agriculture research center near Philadelphia, tagged nitrogen with easy-to-spot atomic markers and then watched as it tra...Highlights in the June 2005 issue of Frontiers in Ecology and the Environment
...ious disease: an ecological view." Discussing how nutrient supplies to an infected host can have important effects on the disease process, the researchers examine the role of varying amounts of carbohydrates, iron, and glutamine on different pathogens....Study shows eutrophic lakes may not recover for a millennium
...Wisconsin scientist notes, but a little bit of the nutrient is all that is needed to send aquatic ecosystems into overdrive. Carpenter's model also shows that, unchecked, phosphorus pollution could put Lake Mendota on a fast track to extreme degradation. "There is a potential shift to an extremely degraded s...Rare chalk grassland takes 50 years to recover from military use
...osity and rainfall infiltration capacity, altering nutrient availability and restricting root growth." Covering 38,000 hectares, Salisbury Plain Training Area is the largest military training area in the UK, and the only training area suitable for large-scale tactical armoured vehicle exercises. However, it i...Soil fertility in the tropics can be influenced by landscape and precipitation, study finds
...rest landscape, and then to detect these shifts in nutrient status using airborne sensors," says Stanford Univ... often are assumed to be highly weathered and thus nutrient depleted," the authors write. But the study, which focused on the island of Kauai, revealed a comple...Tufts nutrition scientists say it is premature to focus on nutrient supplements over diet
...al health outcomes relate to dietary patterns, not nutrient supplements. They further state that there are ins...to one on supplements. The authors emphasize that nutrient supplementation, particularly for certain at-risk populations, has an important place in health care...