Tag: "weeks" at biology news
Faster immune system testing set to improve poultry quality
...une system tests are imprecise, expensive and take weeks
?providing information too late to be useful. Comb...is the relatively short turn around ?five to eight weeks
for broiler chickens. However production involves intensive housing and management to maximise outpu...
Spousal illness can trigger partner death
...dy found that the stress effect may last for a few weeks
or months, and the support effect may last for several years. Eventually, the healthy partner adapts to the stress effect, so that the health risks of being a caregiver decline. However, the lack of social support that is associated with the illness ...
New influenza vaccine takes weeks to mass produce
...es against potential pandemic influenza strains in weeks
instead of the months required for traditional egg-based vaccines. They report their results today at the 2006 ASM Biodefense Research The next flu pandemic could happen any time," says Keyang Wang, a scientist at Protein Sciences Corporation (PSC) ...
Tiny polyps gorge themselves to survive coral bleaching
...that upper limit and stays there for more than two weeks
or so, it triggers a bleaching event. Once that happens, the symbiotic algae and the brown or green photosynthetic pigments inside are lost. The result is a "bleached" white coral. "In most cases, corals get 100 percent of their daily metabolic ene...
New male contraceptive clears hurdle
...ly concluded that the major side effect -- several weeks
of non-painful scrotal swelling in about a third of the subjects --was not enough to stop the study. Additional Safety Tests Since 2002, researchers have conducted several additional laboratory safety tests on RISUG. "When we first began using ...
Animal models show that anabolic steroids flip the adolescent brain's switch for aggression
...ion ?clearly drug-induced -- lasted for nearly two weeks
of withdrawal, the equivalent of half their adoles... Eventually, the aggressiveness subsided; by three weeks
of withdrawal, all the hamsters greeted intruders with normal, playful defensiveness. Autopsy revea...
Stem cells from muscles can repair cartilage
...tissue in the MDSC-B4 treatment group 8, 12 and 24 weeks
after surgery, while the other two groups did not show as much improvement initially and by 24 weeks
had deteriorated. "This finding indicates that continuous endogenous BMP-4 supplied by MDSCs genetic...
Contagious obesity? Identifying the human adenoviruses that may make us fat
...measured food intake and tracked weight over three weeks
before ending the experiment and measuring the chickens' visceral fat, total body fat, serum lipids, and viral antibodies. Chickens inoculated with Ad-37 had much more visceral fat and body fat compared with the chickens infected with Ad-2, Ad-31 or...
Depression model leaves mice with molecular scar
...defeated; they vigorously avoided other mice, even weeks
later. Expression of a representative gene in the hippocampus, a memory hub implicated in depression, plummeted three-fold and remained suppressed for weeks. However, chronic treatment with an antidepressant (the tricyclic imipramine) restored expres...
Bioengineers create stable networks of blood vessels
...lar networks were stable as implants for up to six weeks
and were able to connect with larger blood vessel structures. "This expands our understanding of the neuro-vascular niche and opens up ways to address repair of severed nerves," said Joseph Madri professor of pathology at Yale School of Medicine an...
Genetic key to growth of new arteries is identified
... normal mice grew new arteries, and in about three weeks
the blood flow in their legs was close to normal. The mice without the MMP2 gene did not grow new arteries. About 40 percent lost a portion of a leg due to gangrene caused by inadequate blood flow, demonstrating that the MMP2 gene is "very importan...
Superconducting magnet attracts molecular research
...urrounding the coil needs to be refilled every six weeks
or so. Once the magnet has been fully tested,...n weeklong blocks, though some may run for several weeks
at a time, according to Pochapsky. Magnetic resonance is a physical phenomenon based on the magneti...
Mouse study: New muscle-building agent beats all previous ones
...ent larger than those of untreated mice after five weeks
or more of treatment. The researchers' expectatio...the biggest effect on muscle growth after just two weeks
at the highest dose given (50 milligrams per kilogram mouse weight). Depending on the muscle group a...
One small step means giant leap for spinal cord research
...ot them on a treadmill and worked with them and 18 weeks
later we saw quite a considerable improvement." F...hile the patients' walking skills had decreased 10 weeks
after treatment finished, the team found that overall walking skills were still considerably better ...
The bioweapon is in the post
...truct the specified genes and mail them back a few weeks
later, usually spliced into a bacterium such as Escherichia coli. New Scientist approached 16 such firms, identified by a Google search, to ask whether they screened orders for DNA sequences that might pose a bioterror threat. Of the 12 companies tha...
WWF peeks into mysterious life of Borneo's pygmy elephants
...t often splits off into smaller groups for days or weeks
at a time. The home ranges of Nancy and Taliwas, who were collared in nearby forests, overlap, suggesting that the two elephants' groups may be related. Since elephants live in matriarchal societies, WWF collared only adult female elephants so that e...
Effective, safe anthrax vaccine can be grown in tobacco plants
...matoes and coffee. They grew the cells for several weeks
in Daniell's laboratory. Tests showed the vaccine taken from the plants was just as potent as the one produced through fermentation but lacks the bacterial toxin that can cause harmful side effects. Researchers then injected the vaccine into mice to...
Penicillin, amoxicillin: Step aside for strep throat treatment
... ended up back in the doctor's office within three weeks
of treatment. Children treated with amoxicillin re...ctly lead to children becoming sick on and off for weeks
or months, as the strep germ isn't quite killed off but instead lingers in the child's body. The chi...
Womb needed for proper brain development
...sound study of the brains of babies born around 26 weeks
gestation showed that certain aspects of brain dev...rams (about 2.2 pounds), and who were born just 26 weeks
into a normal 40-week pregnancy. Clinical ultrasounds of the premature infants' brains were done at ...
Cells from amniotic fluid used to tissue-engineer a new trachea
...ective tracheas in seven fetal lambs. Four to five weeks
later, the lambs were born, and all five lambs that survived to term were able to breathe spontaneously at birth, four of them with no sign of respiratory distress. (The other two lambs, twins, were born prematurely and did not survive.) While many ...
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