does

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

The ones that stay and the ones that stray are biological puzzles among Pacific salmon, of whom the vast majority ?but not all ?travel thousands of miles to sea and back to the streams where they hatched. There are chinook salmon populations in Idaho in which an occasional male stays put and matures when only 6 inches long ?that is, he's able to fertilize eggs at even that diminutive size,...

What the eye doesn't see

The first experimental evidence that birds can be deceived by camouflage in the same way that humans are deceived, is published today in Nature [3 March 2005]. The idea that bold contrasting colours help to break-up the body's outline was rapidly adopted by many armies as long ago as the First World War. And in biology this idea of 'disruptive colouration' has long been used to explain ho...

Columbia study shows widely used artery clearing device does not help patients during heart attack

Interventional cardiologists from Columbia University Medical Center have shown that a commonly used procedure to remove fatty debris from blocked arteries during a heart attack does not improve patient outcomes. The procedure, called distal microcirculatory protection, is commonly and successfully used during angioplasty in vein grafts and stenting in carotid arteries. The study, publish...

Does vitamin C help prevent or treat the common cold? Maybe not, after all.

Linus Pauling's book Vitamin C and The Common Cold, published in 1970, was a bestseller and led many people to believe in the value of the vitamin for cold prevention and treatment. But an article in this month's PLoS Medicine reviewing all of the best clinical research on this topic, suggests that the public's enthusiasm for the vitamin may be unjustified. Robert M Douglas of the Australi...

How exactly does the brain control breathing?

An understanding of exactly how the brain controls breathing is fundamental to the treatment of respiratory disorders. We know that breathing is an automatic rhythmic process that persists without conscious effort whether we are awake or asleep, but the question that has intrigued many scientists for well over 100 years is what maintains this almost fail safe vital rhythm throughout life?...

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Tornadoes put technology to work

The 26 F3-grade tornadoes that swept through the south central and western parts of the state set a record for the number of tornadoes here in o...

RNAi: Size Does Matter

Everyone wants to design the dsRNA that most efficiently silences the gene of interest. But how does dsRNA length correlate with silencing efficiency? Ambion scientists addressed this question in the following experiment. dsRNA of different sizes and directed against different region...

Patent ruling doesn't tarnish Wisconsin's stem cell leadership

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What does business want from the schools? Some answers may be surprising

Those skills represent part of what Wisconsin business leaders want to see in graduates of the state's K-12, technical college, and university systems. However, a set of attributes loosely described as life skills and the ability to cope and learn may b...

Sir Ken Robinson: Companies, kids "get" innovation, but K-12 doesn't nurture it

Robinson, a senior advisor to the in Los Angele...

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New antiperspirant in action - Botox does the difference

Wet palms, frequent changing of shirts - the result of excessive sweating - known as hyperhydrosis, is always a state of embarrasment. Botox, a purified form of Botulinum toxin type A, is now a new found solution for treating hyperhydrosis. Prescription antiperspirants and some pills might help to overcome this situation, but not all people are benefited from this situation. Hence for th...

Heparin does not protect from recurrent heart attacks

Professor Mahaffey and his team from Duke Clinical Research Institute have found that either form of heparin (both low molecular weight and unfractionated)gives emergency// protection to heart attack patients by breaking the clots in blood flow to the heart reducing the risk of heart attacks for 24 hours. Though both the forms of heparin gives emergency treatment they are not found to avo...

Estrogen Does Not Prevent Recurrent Strokes

Despite some past evidence that hormone replacement might lower stroke risk in older women, new research shows that estrogen therapy does not protect women from recurrent strokes and may instead carry some risks. The findings add to growing evidence that hormone replacement therapy does not have the cardiovascular benefits doctors once believed. // Many doctors have long thought hormo...

Deep Sleep Doesn't Increase Memory

Students who go to bed early to be ready for a big test the next day might be missing the mark, according to a study to be released Friday by a San Fernando Valley researcher that finds a good night's sleep does not increase memory. // REM sleep is a deep sleep during which an individual's eyes dart rapidly under closed eyelids and the body is almost completely paralyzed except for...

Beer does good

Scientists say one drink of beer a day will help people's sight by preventing cataracts. Beer, particularly ales and stouts, contain high levels of antioxidant chemicals, believed to cut the risk of heart disease. Scientists in Canada carried out tests on rat lenses and found antioxidants, like those in beers, protected cells in the eye which, if damaged, lead to an increase in cataracts....

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Study Demonstrated Rozerem (ramelteon) Does Not Affect Middle-of-the-Night Balance in Older Adults with Insomnia

MINNEAPOLIS, June 13, 2007 /PRNewswire/ -- Two studies presentedtoday demonstrated that Rozerem did not affect body sway at peakplasma levels, nor did it impair middle-of-the-night balance,mobility or memory performance in patients who suffer from chronicinsomnia. The results of the studies were presented at the 21stAnnual Meeting of the Associated Professional Sleep Societies(APSS)....

Drug for Treatment of Heart Failure Does Not Improve Survival, Compared to More Widely-used Medication

CHICAGO, May 1, 2007—The drug levosimendan did not improvesurvival for patients with decompensated heart failure whencompared with a more widely-used treatment for this condition,dobutamine, according to a study in the May 2 issue of Acute decompensated heart failure (ADHF; severe heart failurecharacterized by inability of the heart to maintain adequate bloodci...