Tag: "calcium" at biology news

Duke Geologists Explore Alternative Way To Measure Ice Age Sea Bottom Temperatures

... ice volumes. In contrast, Dwyer said the ratio of calcium to magnesium in seawater is not changed by the bui...ditions. But the relative amounts of magnesium and calcium deposited in ostracod shells do vary according to the temperature of the ocean water. "That's what w...

Dating A Caveman

...ndwater contains a high concentration of dissolved calcium and carbonate ions. When this water emerges from t...te "degasses" as carbon dioxide. At the same time, calcium carbonate precipitates, forming the spectacular deposits seen in limestone caves, such as stalactite...

Researchers Use Hydrated Lime To Reduce Toxic Selenium Emissions

... calcium-based -- forms withthe selenium to create calcium selenite, the first time this reactionhas been documented," Fan said. "The compound is thencaptured by the dry sorbent and can be disposed of with the flyash." The researchers found that the hydrated lime was most effectiveat 400 to 600 degrees Celsi...

Duke Primate Center Sets October Expedition To Find 'Juliet'

... the PrimateCenter scientists believe was too much calcium in her diet, an unexpectedand atypical reaction for a lemur. Romeo, on the other hand, survived andprospered, because as an infant his body required more calcium, and he didnot suffer from hypercalcemia. Calcium-rich foods are now excluded fromRomeo'...

Component In Soy Products May Be Substitute For Estrogen Treatment

...ssiveloss of bone tissue because of a loss of bone calcium and protein. The group that consumed the isolated soy proteins, regardless of isoflavonecontent, saw the greatest improvement in blood cholesterol profiles. "The two soybean groups produced a more favorable display [of cholesterollevels], a rapid c...

UC Berkeley, U.S.G.S. Scientists Discover Microscopic Invader Of San Francisco Bay, The First Known Marine Microbe Invader Of U.S. Waters

...orams, microscopic marine creatures with shells of calcium carbonate, are best known from their abundant fossils, which are found in such profusion and diversity they are used to date sedimentary rocks going back as far as half a billion years. The organism apparently arrived within the past 10 years from J...

ORNL Finds Common Genetic Cause For Epilepsy, Migraine

...tion. "The implicated gene affects the movement of calcium into and out ofspecific brain cells," Stubbs said. "This calcium movement regulates therelease of neurotransmitters, which are critical elements in thecommunication ...

Scientists Urge Further Study Of Alarming Coral Reef Decline

...ating in the water. Certain types ofcorals produce calcium carbonate skeletons -- the coral reefs.Once attach... rate. Without the pigmented algae, the white calcium carbonateskeletons show through the clear polyps; the normally coloredcorals appear bleached. They t...

Purdue Researchers Prod Plants To Clean Up Pollution

...p and store calcium. Plants need a large amount of calcium for normal growth and development, but too much ca...n kill them. "Most plants have cells that serve as calcium dumps," Webb says. "Plants have a tremendous ability to store calcium oxalate." Some plants contain ...

Merging Physics And Neuroscience: First Evidence Of Self-Organized Criticality In Brain Networks

...Missouriat St. Louis, noticed similarities between calcium ion waves thatCornell-Bell observed and mathematic...nt of Imbalance Makes Waves More Likely The calcium ion waves studied by Jung, Cornell-Bell, Moss andcollaborator Dr. Kathleen Shaver Madden arise rando...

Female Adolescents Need Calcium During 'Window Of Opportunity'

WEST LAFAYETTE, Ind. -- The amount of calcium adolescents need to achieve maximum bone growth ha... of Food and Nutrition, says "before the amount of calcium needed by adolescents was just an estimate." The new data were instrumental in developing the revise...

Insulin Resistance Is A Risk Factor For Atherosclerosis In Whites And Hispanics

... of the artery due to build up of fattysubstances, calcium and blood clotting materials on the interior artery walls.The carotid arteries serving the brain are particularly susceptible. Stroke canresult when the carotid artery walls narrow to the point that the brain does notget sufficient blood. How...

Fossils Show British Columbia Was Once 2,000 Miles South

...urrounding rocks had beensubjected to heating, the calcium carbonate in the shells would have turned toblack calcite. Indeed, Ward says, all of the ammonites discovered to date onneighboring Vancouver Island are black. The researchers took their core samples only where they found the shinyfossils. In...

Scientists Find New Trigger For Nerve Cell Death

... even in the presence of a substance that prevents calcium from flowing intocells. "These experiments don't rule out a role for calcium in apoptosis," Yusays. "But they do suggest that potassium outflow is independently an importantmech...

Colorado State Anthropologist Finds Fossil Treasures In Africa

...eeks in vinegar or other weak acid to dissolve the calcium carbonates that hold the breccia together. Once thespecimens are restored, Waddle will take them to the Smithsonian Institution in Washington, D.C., for identification, using itsinventory of primate fossils to determine whether they represent a new o...

Researcher Discovers Plant Genes For Phosphate Uptake

...omist Dave Mengel. "In alkaline soils of the West, calcium reacts with the phosphorus and essentially fixes it." Midwestern soils hold the mineral less tightly, but generally still require annual applications of phosphorus to keep crops healthy, Mengel says. Even in the Midwest, soil phosphorus is the least ...

UPCI Researchers Find Drug Improves Cancer-Fighting Ability Of Vitamin D

... causes a potentially life-threatening increase of calcium in the blood," said Donald Trump, M.D., an investi...hasone to 1,25-D3 also significantly reduced blood calcium levels. 1,25-D3 causes buildup of blood calcium in several ways. It increasescalcium releas...

Iron Deficiency Increases Likelihood Of Bone Fractures

...mmon, but people are more likely to think theyneed calcium or vitamin C for healthy bones. “We kno...amin C deficiency leads to scurvy, and we knowthat calcium deficiency leads to osteoporosis, but if we just concentrateon those two, we might not be doing ours...

Calcium Potentiates The Effect Of Estrogen And Calcitonin And Bone Mass

...ompanying Editorial: Osteoporosistreatment and the calcium requirement. B. Dawson-Hughes, USDA HumanNutrition...nation of estrogen replacement and atleast 1200 mg calcium daily, rather than either treatment alone....

New Chemical Processing Technique Being Studied At UW May Hold Key To CleaningUp Hanford, Reducing Industrial Waste

...material acts like a sponge for positively-charged calcium ions in hard water. Eventually, however, the ion exchange material becomes filled with calcium and must be regenerated by a series of chemicaltreatments. A concentr ated salt-water solution is us...

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(Date:4/23/2014)... University researchers have identified an important enzyme pathway that ... too few chromosomes, a condition that has been directly ... associate professor of biochemistry, found that near the end ... enzyme that ensures any breaks in DNA are fully ... genome to daughter cells. This process helps safeguard against ...
(Date:4/23/2014)... could help doctors predict which patients might suffer potentially ... The program, which assesses brain scans using pattern recognition ... passport control, has been developed by researchers at Imperial ... the Wellcome Trust, which used the software are published ... Stroke affects over 15 million people each year worldwide. ...
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