excess 2 4

Tag: "excess" at biology news

Nutrition a major factor in rise in twin pregnancies

...d by embryo division (so all are of like sex), the excess rate of same-sex twins among natural conceptions has risen steadily for the last 80 years. MZ twins were relatively rare among IVF babies in the 1980s ?much less than occurs naturally ?but then rose in the nineties to reach 14 per 1000 by the year ...

Brain enzyme treatment relieves memory lapse in Alzheimer's mice

An enzyme that helps neurons rid themselves of excess or aberrant proteins is required for normal brain function, according to a new report in the August 25, 2006 issue of the journal Cell, published by Cell Press. What's more, by increasing brain levels of the enzyme in mice with Alzheimer's symptoms, ...

Super-sized cassava plants may help fight hunger in Africa

...nted to find a way to help the plant redirect that excess sugar and use it to make starch," Sayre said. The researchers used a variety of cassava native to Colombia (cassava was brought to Africa from South America by the Portuguese in the 1500s.) They inserted into three cassava plants an E. coli gene tha...

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

...t of melanin in skin cells, meaning there was less excess pigment in the skin to cause age spots. Additionally, the panel concluded that a formulation of n-acetyl glucosamine and niacinamide, a vitamin B derivative, significantly reduced the amount and appearance of hyperpigmentation, age spots and uneven ...

Hopkins study suggests commercially available antibiotic may help fight dementia in HIV patients

... between neurons (the synapse), thereby preventing excess neuronal excitation, which in turn can cause cell death and brain damage. Ceftriaxone, used to treat pneumonias, sexually transmitted diseases, bacterial meningitis and other infections, is a known stimulator of EAAT-2 expression and protects agains...

Higher carbon dioxide, lack of nitrogen limit plant growth

Earth's plant life will not be able to "store" excess carbon from rising atmospheric carbon dioxide leve...s current and future sinks--or storage places--for excess carbon dioxide hinges on an ability to understand the complex interaction between atmospheric carbon...

Sun protection for plants

... plant damage by harmlessly dissipating the lethal excess radiation. This photoprotective process was found ...s have at a molecular level to prevent damage from excess sunlight. We hope that this knowledge could be used to improve photosynthesis rates, and therefore p...

USC, Rice to develop bacteria-powered fuel cells

... the parts of fuel cells and batteries that gather excess electrons for harvesting. To optimize its design, the team must understand how bacteria transfer electrons to anode surfaces under a variety of conditions. "There are three primary components in the system: the bacteria, the surface and the solution...

Rutgers researchers find fat gene

...ack of lipin causes a loss of body fat, whereas an excess of lipin promotes extra body fat. So researchers knew that lipin was involved in fat metabolism; they just didn't know how. The Carman team's first revelation came with the discovery that lipin is an enzyme (phosphatidic acid phosphatase or PAP), ...

Engineered mouse mimics cognitive aspects of schizophrenia

... analyses of the animals' brains revealed that the excess dopamine receptor activity in the striatum contributed to abnormal prefrontal cortical function. Importantly, found the researchers, they could not reverse these cognitive deficits by using the antibiotic to damp down the dopamine machinery. This fi...

Scientists discover that widely available drug also helps fight kidney disease

... to over-activation of mTOR. This, in turn, causes excess growth and proliferation of kidney cells, which results in the formation of thousands of cysts that eventually destroy the kidney. Fortunately, a highly effective inhibitor of mTOR is well known. This drug, rapamycin, was originally discovered in th...

Concern over fast tracking of new drugs

...multiple sclerosis, with estimated annual sales in excess of $2bn. Around 3000 patients took part in the trials and nearly 5000 patients have been treated in the United States since it became commercially available. In the United Kingdom, natalizumab was due for appraisal by the National Institute for Heal...

Hooked on fishing, and we're heading for the bottom, says scientist

... be turned around. He believes that a reduction of excess fishing capacity, the creation of "no-take zones" covering about 20 per cent of habitats, and political enforcement of sustainable fishing levels will result not just in pulling back from the brink, but more fish for our tables. "The irony is that r...

There's something fishy about human brain evolution

...uman infants are the only primate babies born with excess fat. It accounts for about 14 per cent of their birth weight, similar to that of their brains. It's this baby fat, says Dr. Cunnane, that provided the physiological winning conditions for hominids' evolutionary brain expansion. And how were hominid...

Breakthrough for stem cell research

...tile couples that specifically consented for their excess embryos to be used in stem cell research. These ...ompleted their families often ask us to donate the excess embryos created during their past treatments to research to help others," said Emeritus Professor Do...

Chlamydia parasite lives off our fat

...ionally been regarded as passive storage depots of excess fat. However, recent studies have reassessed their role. Lipid droplets are now known to be motile, dynamic and enriched for proteins known to regulate lipid synthesis, membrane traffic and cell signaling. Now in new research presented Sunday at the...

Hepatitis B accounts for 40 percent of 'missing' Asian women

...nt in economics at Harvard University) argues that excess female mortality, such as infanticide, may not be the only cause of uncommonly high male to female ratios in many Asian countries. It has long been observed that the relative number of males is higher in certain Asian countries than in the West, wher...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...the same foot-thick segments of the core where the excess methane was measured in otherwise clear ice at dep...active, could have produced the observed amount of excess methane in the ice. "We found methanogens at precisely those depths where excess methane had been f...

Scientists develop nanotech-laser treatment that kills cancer cells without harming healthy tissue

...in the nanotube become excited and begin releasing excess energy in the form of heat. In the experiment, Stanford researchers found that if they placed a solution of carbon nanotubes under a near-infrared laser beam, the solution would heat up to about 158 degrees F (70 C) in two minutes. When nanotubes we...

Studies clarify risk factors for mother-to-child transmission of hepatitis C virus

... higher HCV rates in female newborns may be due to excess mortality in infected males in utero. "Overall, the observation of higher hepatitis C virus infection rates in female infants is in accord with recent observations of similar excesses in HIV infection of female infants," Dr. Beasley said. ...

1 2 3 4 5 6