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Tag: "each" at biology news

Smithsonian scientists discover new marine species in eastern Pacific

...ng the next several years, as taxonomists classify each organism. This adventure is far from over. The STRI team is ideally positioned to thoroughly sample the entire fauna, not just the corals and fishes. Since most studies of the Eastern Pacific date back 100 years, it is vital to obtain current dat...

Study finds surfing safer than soccer

...re a limited number of surfers in the water during each heat and the skill level is very high. On the other hand, recreational surfers are often trying to catch waves in a dense crowd of surfers of varying abilities," says Nathanson. The authors note that although age and gender had no bearing on the ...

Female Antarctic seals give cold shoulder to local males

...y viewed as being dominated by males fighting with each other for the right to mate with passive females. So it's not only remarkable to uncover active female choice in such a system, but this also suggests that female choice may be more widespread in nature than we previously thought." Studies of othe...

Children who sleep more weigh less

... children ages 5 to 12 get 10 to 11 hours of sleep each night and adolescents get 8 to 9 hours, the study found that on weeknights, 7-year-olds slept on average less than 10 hours. By age 14, weekday sleep time fell to 8.5 hours. “Our results suggest that many American children are not sleeping enough,...

Hybrid molecule causes cancer cells to self-destruct

...other formulas and the butyrate-ManNAc hybrid were each added to lab dishes containing cancer cells. After three to five days, cancer growth had slowed in all of the dishes. After 15 days, however, cancer growth had resumed in dishes treated with four of the compounds. But in samples treated with the buty...

Fighting influenza & co. with 40,000 blood samples

...o hospital with completely different ailments. For each sample, the age of the person it was taken from is known. The scientists aim to obtain an overview of the immune status of the population which is as representative as possible. 'Recently a number of new respiratory viruses have been discovered,' the...

Soft-cell approach cuts animal tests

...ts, rabbits, sheep, cattle, pigs and mice are used each year for toxicological testing and research." This is a drop in the ocean, compared with the animal death toll in the rest of the world. In many inhalation studies, the toxicity of airborne chemicals is tested on laboratory animals by placing the...

Are one-third of costly implanted heart devices unnecessary? New study suggests yes

...udden cardiac death, which kills 300,000 Americans each year. But a new study finds that while many of th... be spared the additional $90,000 lifetime cost of each device compared to best medical therapy. The study, published in the January issue of the Journal...

When your brain talks, your muscles don't always listen

...s was embedded in the muscle of an index finger of each subject. The electrode was hooked up to a computer...e index finger was held steady in a small harness, each subject was asked to use the finger to follow the outline of a sinusoidal curve, with its peaks and ...

McBride shows DNA detective work with paper-eating bacteria that 'glide'

...ted to a fruit fly than these two organisms are to each other," he says. However, from analysis of genes from the two bacteria, McBride suspects that they use the same basic machinery to move. And there may be another connection. F. johnsoniae doesn't eat cellulose, but it is able to digest a similar ...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...ural stem cells. And, they were equally as good as each other - in the first head-to-head comparison ever done between embryonic and "adult" stem cells, although the embryonic stem cells were somewhat easier to "scale up" into large quantities. Both types of human stem cells invoked the same range of mult...

Synthetic peptide targets latent papilloma virus infections

...by HPV. Four thousand women die of cervical cancer each year. Once infected, it's difficult to rid oneself of the virus because it hides as a latent DNA in cells of the epithelial tissue, such as skin and the lining of the vagina and cervix, and spreads as these cells divide. The UC Berkeley team crea...

Massive coral death attributed to earthquake

...rals are so well preserved we could still identify each species, despite these colonies having been exposed for two years. Some species suffered up to 100 percent loss at some sites, and different species now dominate the shallow reef." "This is a unique opportunity to document a process that occurs mayb...

Bisexual fruit flies show new role for neurochemical

...er of receptors on nerve cells. The more receptors each cell has at its communication points, or synapses, the better that messages are carried through the brain. A UIC research team led by David Featherstone, assistant professor of biological sciences, has discovered that receptor numbers are controlle...

A genetic 'gang of 4' drives spread of breast cancer

...to hypothesize that they might be cooperating with each other in a way that would give an advantage to cells in the primary tumor," said Massagué. "These same genes, we believed, might also be used for some related purpose in the target organ, the lung." To test this idea, the researchers silenced vario...

Researchers find gene mutation that causes infertility in male mice

... embryonic cell with two chromosome sets, one from each parent. The mutation leads to a change in an ami... (one version of the pair of genes we inherit from each parent) is dominant; females who carry it remain fertile but carry the defect and pass the mutation ...

Fitness has fallen since the days of Ancient Greece

...0 triremes at any one time, and with 170 rowers in each ship, the rowers were clearly not a small elite. Yet this large group, it seems, would match up well with the best of modern athletes. Either ancient Athenians had a more efficient way of rowing the trireme or they would have to be an extremely fit g...

Renegade RNA -- Clues to cancer and normal growth

...that fine-tune how much protein is being made from each gene." That's why normally microRNAs always ha...of RNA that can be thousands of nucleotides long), each microRNA has a different combination of blocks. Mendell's team realized that six building blocks at ...

Radiation therapy combo cures prostate cancer long-term

...lled brachytherapy, are small radioactive pellets, each about the size of a grain of rice. The seeds are inserted into the prostate through small needles during a brief outpatient procedure. External beam radiation therapy involves a series of 25 short daily outpatient treatments, where a radiation oncolo...

Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps

...lies of the rhesus genome data were carried out at each of the three sequencing centers using different an...ctive to observe what has been added or deleted in each primate genome during evolution of rhesus, chimp, and the human from their common ancestors ," said ...

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