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Tag: "decrease" at biology news

How ancient whales lost their legs, got sleek and conquered the oceans

...As they suggest, there could have been a continual decrease in Sonic as the limbs reduced until the modern version of the animal arrived." The study itself, combining fossil and developmental data, is notable, Tabin said. "Whales went through this remarkable transformation to become more like the ancestral ...

The molecular mechanism of a diabetes vaccine revealed

...to understand that this protein is able to cause a decrease in the immune response, but how it actually works eluded us," says Cohen. In a paper published in the Journal of Clinical Investigation, the scientists have managed to identify the exact immune cells that p277 acts upon and its mechanism of action. ...

Elephants, large mammals recover from poaching in Africa's oldest national park

...cent unrest over the past decade has resulted in a decrease in tourism dollars as well as wildlife. Tourism in the region has the potential to generate significant revenues for the parks and the country. In Uganda, Kenya, and Tanzania, the tourism business has generated millions of dollars, not only for the p...

High-dose flu vaccines appear to safely boost immunity in elderly

...ound information in the article. Immune responses decrease with age, however, and currently available flu vaccines are not always effective in the elderly. Recommended vaccines contain 15 micrograms (ìg) of inactivated virus per strain. Wendy A. Keitel, M.D., Baylor College of Medicine, Houston, and collea...

Brain enzyme treatment relieves memory lapse in Alzheimer's mice

...shock, mice with reduced levels of Uch-L1 showed a decrease in freezing behavior to 65% that of normal mice when placed in the box. The differences between treated and untreated mice persisted 7, 14, and 21 days after exposure to the electric shock, they reported. On the other hand, the mice showed no diffe...

Research identifies protein in mice that regulates bone formation

Osteoporosis, a disease characterized by a decrease in bone mass and density and which makes people more susceptible to bone fractures and deformities, afflicts some 10 million Americans over the age of 50. Researchers at the Harvard School of Public Health (HSPH) have discovered that eliminating a pr...

Production of key Alzheimer's protein monitored for first time in humans

...chers are developing Alzheimer's drugs that either decrease Abeta production or increase its clearance, Bateman notes, and the new test could be very important in determining which approach is most effective. Prior to the new test, the only way to assess the effectiveness of a new Alzheimer's drug was to fo...

Dartmouth study finds that arsenic inhibits DNA repair

...hat arsenic in drinking water is associated with a decrease in the body's ability to repair its DNA. "This work supports the idea that arsenic in drinking water can promote the carcinogenic effects of other chemicals," says Angeline Andrew, the lead author and a research assistant professor of community and...

Chemical in many air fresheners may reduce lung function

...f 1,4 DCB. There was approximately a 4 percent decrease in the test which measures forced expiratory volume in 1(FEV1) second between the highest and lowest levels of exposure. FEV1 is a commonly used index for assessing airway function and obstruction. The researchers assessed the influence of other f...

Mosquito spray increases toxicity of pyrethroids in creek, study finds

...n the water flea's mortality, although there was a decrease in the flea's reproduction in three of the 11 water samples. Researchers also looked at the survival rates of a tiny, shrimp-like amphipod called Hyalella azteca, an indicator species for sediment toxicity. More significant effects were seen in the...

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

... is relaxing too much and taking the medicine will decrease the amount of acid that's going into their esophagus," she said. "Since I don't have a lot of evidence that changing their diet dramatically is going to take the heartburn away, it makes more sense just to take the medicine," she added. That said, ...

UC Davis study finds HIV hiding from drugs in gut, preventing immune recovery

...owever, the targets of the virus and their numbers decrease as the amount of HIV increases, leaving the body vulnerable to a variety of infections. Last year, Dandekar's team published a study of HIV-infected patients who, despite the lack of treatment, had survived over 10 years with healthy levels of T-ce...

Scientists find Antarctic ozone hole to recover later than expected

...depleting gases over Antarctica, and how they will decrease over time, reducing the ozone hole area." For the first time, a model combines estimates of future Antarctic chlorine and bromine levels based on current amounts as captured from NASA satellite observations, NOAA ground-level observations, NCAR air...

Researchers find molecular 'brake' to cell death

...lot of CC, he says. Tumor cells also don't want to decrease their nucleotide pool, because they need ATP for c...hey should maximize release of CC and maximize the decrease of nucleotide levels." Some chemotherapy drugs, like paclitaxel, cisplatin and etoposide, appear, c...

Science finds new fix for UV-damaged skin in arthritis treatment

...provement in hyperpigmentation and skin tone and a decrease in the size of age spots. The research is set to be presented in July at the "Academy '06" meeting of the American Academy of Dermatology (AAD), and was first presented at the AAD annual meeting in March 2006. Skin Biology Gives Researchers Clues fo...

Ocean acidification threatens cold-water coral ecosystems

...es of chemical reactions that increase acidity and decrease carbonate ion concentration in seawater. Corals an...ul effects throughout marine ecosystems." Only a decrease in the burning of fossil fuels is likely to slow this trend, say Guinotte and colleagues. ...

Inflammation and drugs to control this activity studied in a variety of tumors sites

...l response to inflammatory stimuli may increase or decrease a person's risk of developing a brain tumor," Scheurer said. Influence of Chronic Inflammation on Prostate Carcinogenesis: A Five-Year Follow-up Study: Abstract No. 1474 Researchers at Case Western Reserve University in Cleveland have evidence li...

p53, tumor suppression and aging

...activity. The researchers found that even a modest decrease (about 20%) in Mdm2 effectively prevents tumor formation and does not lead to premature aging. Dr. Perry emphasizes that "many people develop cancer at a young age due to increased expression of Mdm2. The possibility that inhibitors of Mdm2 could d...

An elephant tail

...lowing a heart attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 years or o...

Little known DNA repair enzyme may be a tumor suppressor gene

...lowing a heart attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 years or o...

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