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Tag: "nutrient" at biology news

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...gical communities, water temperature, salinity and nutrient loads. The scientists operated around the clock to maximize expensive ship time, sampling at 14 locations in all; five involved depths 3,300 meters and more below ice. The explorers employed a suite of tools to conduct "gentle sampling," including a...

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. ### The researchers include Manu V. Chakravarthy, Zhijun Pan, Yimin Zhu, Karen Tordjman, Jochen G. Schneider, Trey Coleman, John Turk, and Clay F. Semenkovich o...

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...

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...

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...

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...

From a Few Wild Ancestors, a Citrus Cornucopia

... and pathogen resistance and to high flavonoid and nutrient levels.?/p> For their work, the researchers used 25 molecular markers, 13 of which they created, to help them track genetic similarities between accessions. The markers -- not unlike those used in forensics for determining genetic identity and pa...

Hidden sponges determine coral reef's nutrient cycle

...s sponges, play an extremely important role in the nutrient cycle of coral reefs. Indeed they probably play th...heffers investigated a lesser-studied subject: the nutrient cycle on the coral reef and the role that organisms living in cavities, such as sponges, play in thi...

The ecological effects of the Chernobyl disaster

...utation rates, to plant and animal communities, to nutrient cycling. Sergey Gaschak (International Radioecology Laboratory, Ukraine) will open the session with his presentation, "Determinants of levels of 90Sr and 137Cs in birds in Chernobyl." Studying 228 birds of 23 different species captured in Chernobyl,...

Life in deadly conditions

...pharaonis, with the possibility of simplifying the nutrient solution, opens new possibilities for experimentally investigating the metabolic network. The data we thus acquire make up an important foundation for developing and testing metabolic models in the framework of systemic biological studies and in inte...

Storing carbon to combat global warming may cause other environmental problems, study suggests

...d in a new report. Those effects include water and nutrient depletion and increased soil salinity and acidity,...," the study added. "They typically have increased nutrient demands as well." In order to store carbon from carbon dioxide in their tissues, trees must also re...

Novel protein complex enables survival in hostile environment

... converts toxic sulfite into sulfide, an essential nutrient of M. jannaschii. This enzyme, coenzyme F420-dependent sulfite reductase, or Fsr, "uses an unusual coenzyme ?a deazaflavin molecule called Factor 420 -- as an electron carrier for the reduction of sulfite. None of the previously described sulfite r...

Bugs expose underground carbon traffic system 10 times more important than fossil fuel burning

...o open up a new understanding of the food-webs and nutrient flow in soil which is fundamental to sustainable agriculture. ...

UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

...ntering the lake." Both phosphorus - a fertilizer nutrient that occurs both dissolved in the river water and ...oration plan will be the management and control of nutrient inputs to the lake. Inflow water into the Salton Sea by way of the Whitewater River, the New River ...

Study finds that nutritionally enhanced rice reduces iron deficiency

...rch findings and partners to increase the level of nutrient density in rice to be even more effective. "We view this study as a 'proof of concept,'" said Zeigler. "We now know that, if plants are bred with higher levels of iron and other micronutrients, they will improve the nutritional status of people wh...

Plants give pests sock in the gut

...logical tests show that caterpillars have impaired nutrient utilization when they eat the enzyme. They just ca...lar to the mucus layer in animals and is vital for nutrient utilization because it helps the flow of nutrients into the food gut. The researchers tested the p...

Marine mammals are on the frontline of failing ocean health

...ms are likely caused by multiple stresses, such as nutrient overloading and global warming, acting together. These blooms are on the rise, and many are associated with toxins and bacteria that are harmful to humans. "We need to figure out what is causing this increase," says Bossart. "It's in our own best i...

Tastier tomatoes in the future?

...technology, March 12, 2006). Tomatoes are a major nutrient for humans. In 2004, 120,000 tonnes of tomatoes were harvested worldwide - and every year this number increases. Numerous medical studies have shown the health value of tomatoes. Lycopen, the pigment that makes tomatoes red, can for example prevent h...

There's something fishy about human brain evolution

...ish. "The shores gave us food security and higher nutrient density. My hypothesis is that to permit the brain...fully so. Iodine deficiency is the world's leading nutrient deficiency. It affects more than a 1.5 billion people, mostly in inland areas, and causes sub-optima...

Too much sugar not good for coral reefs

...t hotels. But increased development can mean more nutrient rich runoff that threatens the very coral reefs attracting tourists in the first place. David Kline at the Smithsonian Tropical Research Institute and colleagues find that bacteria on coral reefs grow out of control as the level of simple sugars in...

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