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Latest Biomolecules Stories

2009-02-23 22:55:29

A team of European researchers says hair grays with age as follicles become bleached first gray, and then white, from within. The researchers closely examined cell cultures of human hair follicles and found in the absence of the enzyme catalase, the hydrogen peroxide naturally produced in hair cells stops being broken down into water and oxygen. Also, hair follicles could not repair the damage caused by the accumulating hydrogen peroxide because of low levels of enzymes MSR A and B. High...

2009-02-17 10:50:22

 A Duke University-led team has brought powerful software to the never-ending arms race between antibiotics and germs. Working together, computer scientists and biochemists have developed and laboratory-tested a computer program that can show experimentalists how to change the machinery that bacteria use to make natural antibiotics.The program -- a set of computer rules known as the algorithm "K*" (pronounced K Star)-- is able to sort through all the possible shapes and changes of a key...

2009-01-19 10:00:00

Bifera provides the energy and nutritional benefits from iron with virtually no gastrointestinal side effects and is now available without a prescription ATLANTA, Jan. 19 /PRNewswire/ -- Bifera (www.bifera.com), an over-the-counter iron supplement that offers both heme (protein-based iron) and non-heme iron (plant-based iron) is now available in stores in the United States. Unlike other iron supplements, Bifera provides two types of iron in one small pill for maximum absorption with...

2009-01-09 15:41:14

Now, a pair of Scripps Research Institute scientists has taken a significant step toward answering that question. The scientists have synthesized for the first time RNA enzymes that can replicate themselves without the help of any proteins or other cellular components, and the process proceeds indefinitely.The work was published on Thursday, January 8, 2008, in Science Express, the advanced, online edition of the journal Science.In the modern world, DNA carries the genetic sequence for...

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2008-11-12 11:39:13

Enzyme, biological reaction essential to life takes 2.3 billion years All biological reactions within human cells depend on enzymes. Their power as catalysts enables biological reactions to occur usually in milliseconds. But how slowly would these reactions proceed spontaneously, in the absence of enzymes "“ minutes, hours, days? And why even pose the question? One scientist who studies these issues is Richard Wolfenden, Ph.D., Alumni Distinguished Professor Biochemistry and Biophysics...

2008-09-28 00:00:17

By The Associated Press DES MOINES (AP) - Critics are complaining that state environmental officials have done little about an outbreak of toxic algae that threatened the safety of drinking water in Iowa's largest city and posed a risk to swimmers at a west-central Iowa lake.They said the blue-green algae, or cyanobacteria, was found at Black Hawk Lake near Lake View, and that levels recorded just after Labor Day were seven times more than an internationally recognized benchmark for safe...

2008-09-16 15:00:38

A U.S. scientist says a combination of the new drug trabectedin with pegylated liposomal doxorubicin provides clinical benefit for relapsed ovarian cancer. University of California-Irvine Associate Professor Bradley Monk said the combination, which does not include a platinum drug, challenges the current standard of treatment for women whose cancer recurs at least 6 months after first-line treatment. "This trial, which included almost two-thirds such women, challenges this traditional...

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2008-09-12 14:33:47

Scientists at Stanford University Medical Center reported Thursday that an enzyme that helps the body metabolize alcohol might also limit injury during a heart attack.  They also found that an experimental drug might amplify this protective effect, the researchers said. The scientists hope their study, performed in rats, may one day lead to a drug that would protect those suffering from the chest pain that often precedes a heart attack. Such a drug may also have uses during coronary...

2008-09-11 15:00:11

Marauding molecules cause the tissue damage that underlies heart attacks, sunburn, Alzheimer's and hangovers. But scientists at the Stanford University School of Medicine say they may have found ways to combat the carnage after discovering an important cog in the body's molecular detoxification machinery. The culprit molecules are oxygen byproducts called free radicals. These highly unstable molecules start chain reactions of cellular damage -- an escalating storm that ravages healthy...

2008-09-11 03:00:19

By Manian, Avinash P Lenninger, Margit; Bechtold, Thomas; Steinlechner, Erik Abstract The liming propensity of a woven cellulosic substrate is investigated as a function of substrate characteristics and of different parameters in the test environment. The results from the linting propensity tests parallel those observed in liquid-solid extraction processes, where solutes are extracted from a matrix of other insoluble solids by selective dissolution in a liquid. The equation quantifying...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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