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Tag: "acidity" at biology news

Scientists uncover link between ocean's chemical processes and microscopic floating plants

...sts have discovered that increased levels of ocean acidity and carbon dioxide concentrations have resulted in...er recent scientific studies have shown that ocean acidity is rising 100 times faster than ever before, Wingenter said, but this study links the effect of incr...

Xylitol reduces risk of cavities

...f xylitol for a limited time reduced the degree of acidity in plaque between teeth. In a field study involving 128 children aged 7?2, the subjects were asked to chew gum three times a day, with a total daily dose of 6.0 grams of xylitol. The amount of plaque and the production of lactic acid declined dra...

Swell gel could bring relief to back pain sufferers

...fluid at a low pH - in other words, a low level of acidity - and can be injected through a syringe. It changes to a stiff gel at physiological pH values - that is, once it enters the body - due to absorption of water by the particles. During their investigations, the research team injected the material in...

Coral reefs are increasingly vulnerable to angry oceans

...oduction of greenhouse gases is an increase in the acidity of the ocean. This is likely to reduce the stability of coral reefs, and amplify the damage done by tropical storms in coming decades. Other effects of global warming could limit the capacity of the reefs to bounce back from periods of high wave fo...

Stormy days ahead for coral reefs

...oduction of greenhouse gases is an increase in the acidity of the ocean. This is likely to reduce the stability of coral reefs, and amplify the damage done by tropical storms in coming decades. Moreover, other effects of global warming and human activity could impair reefs' capacity to bounce back fro...

Gene therapy prevents the onset of diabetic symptoms in mice

...re surprised to find that by summer 2002, the soil acidity in both the top and lower layers of the test plot neutralized from being highly acidic to more acceptable levels for sugar maples. The researchers also found that by the second year, calcium levels in the maples' leaves had risen. Acid rain also in...

Acid rain causing decline in sugar maples, say researchers

...re surprised to find that by summer 2002, the soil acidity in both the top and lower layers of the test plot neutralized from being highly acidic to more acceptable levels for sugar maples. The researchers also found that by the second year, calcium levels in the maples' leaves had risen. Acid rain also in...

Orange, grapefruit juice for breakfast builds bones in rats

...uice - mixed with sodium bicarbonate to neutralize acidity - was given to the rats each morning. "They drank it with no problem, every morning," Deyhim said. "They drank more fresh juice than I did during that period." Deyhim said the juice study was followed by a similar test with orange and grapefruit pu...

New understanding of parasite cell structures may provide treatments for serious tropical diseases

...caused by changes in osmotic pressure and relative acidity or alkalinity. The research by the UGA team is especially important in better understanding the parasite Trypanosoma brucei, which causes human African trypanosomiasis, a disease that affects more than 66 million women, men and children in 36 countr...

Report warns about carbon dioxide threats to marine life

... them less alkaline and more acidic. The increased acidity lowers the concentration of carbonate ion, a building block of the calcium carbonate that many marine organisms use to grow their skeletons and create coral reef structures. "This is leading to the most dramatic changes in marine chemistry in at lea...

Corals switch skeleton material as seawater changes

...nd predicted future changes in the temperature and acidity of our oceans ¬¬-- via global warming and rising atmospheric CO2 , respectively -- that will presumably have a significant impact on corals' ability to build their skeletons and construct their magnificent reefs," he said. Corals are crucial to nea...

Parallel evolution: Proteins do it, too

...lobines functioned more efficiently at the typical acidity level of the colobine small intestine, he found. "Then our question was whether the similar functional changes were due to identical amino acid changes at the protein sequence level," Zhang said. "Indeed, we found three amino acid changes that were ...

Acidity in the brain could hold the key to stroke treatment

...ent of a new non-invasive technique which measures acidity (pH) in the brain. A stroke is caused when part o... blood supply to the brain is cut off. This causes acidity in the brain to build up, leading to damage. CT scans are currently used to detect bleeding, swelli...

Chocolate, wine, spicy foods may be OK for heartburn, Stanford study finds

...pressure exerted by the sphincter or increased the acidity in the stomach, but not at whether taking that foo...ned the effect of coffee on sphincter pressure and acidity in the esophagus, and none of them demonstrated a change after coffee consumption. To date, no one h...

Rice scientists make first nanoscale pH meter

...acid, or pMBA. When placed in solutions of varying acidity and illuminated, the nanoshell-molecule device provides small but easily detectable changes in the properties of the scattered light that, when "decoded," can be used to determine the pH of the nanodevice's local environment to remarkably high accura...

Ocean acidification threatens cold-water coral ecosystems

...iates a series of chemical reactions that increase acidity and decrease carbonate ion concentration in seawater. Corals and other marine organisms (e.g. some species of plankton and mollusks) use carbonate ions to build their skeletons or shells. Model projections indicate that by 2100, only 30 percent of c...

Research: Snails were overlooked contributors to marsh destruction

...he cause. The drought dried up soils, raised their acidity and boosted estuarine water and soil salinity levels -- all of which were blamed for stressing cordgrass and other marsh grasses beyond their limits. Silliman and four other authors of the Science paper don't dispute the drought's impacton what scie...

'Acid rain' and forest mass: Another perspective

...tion in an effective manner although the potential acidity was greater in those areas near emission foci. The uptake of acidifying ions and nitrogen caused an acceleration of the return of nutrients (amount of nutrients that the vegetation gives back to the soil together with the litterfall and foliar excret...

Give thanks for the cranberry, say dental researchers

...ranberry juice can cause cavities, and the natural acidity of the substance may contribute directly to tooth decay. Instead of advocating mass consumption of cranberry juice, Koo hopes to isolate the compounds within the juice that pack an anti-cavity punch. The substances could then be added to toothpaste ...

Oceans turning to acid from rise in CO2

...organisms dependent upon corals and shellfish. The acidity could also negatively impact other calcifying organisms, such as phytoplankton and zooplankton, some of the most important players at the base of the planet's food chain. "We can predict the magnitude of the acidification based on the evidence that ...

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