Tag: "hibernation" at biology news
New study discovers why 'persister' cells never say die
... a toxin (the ReIE toxin) which puts the cell into hibernation
and because antibiotics must work on growing cells to destroy them, the hibernating cells can outlast the antibiotic and then repopulate the infection. The results of the study appears in the most recent issue of the Journal of Bacteriology, titled ...
Study in Royal Society journal on managing GM crops for environmental benefit
...050, OSLO, N-0316, Norway Sperm influences female hibernation
success, survival and fitness in the bumble-bee Bombus terrestris by Dr B Baer and Professor P Schmid-Hempel An unresolved problem in biology is why females mate with several males. Bumblebee colonies would benefit from queens mating multiply becaus...
Buying time through 'hibernation on demand'
...irst time, induced a state of reversible metabolic hibernation
in mice. This achievement, the first demonstration... it and turning it on and off, inducing a state of hibernation
on demand," said Roth, a member of Fred Hutchinson's Basic Sciences Division. During a hibernation-...
Tiny toads fitted with backpacks
...nt and the need to preserve breeding, foraging and hibernation
habitats for toads and other amphibious species. S...s. Last year, Browne was able to track 12 toads to hibernation
and describe their hibernation
sites. The transmitters were then removed and the toads released for ...
Chemical that triggers hibernation may protect muscles
...hether pretreatment with the chemical that induces hibernation
(hibernation induction trigger or HIT) would have the same protective effect as IP in skeletal muscles and the mechanism by which this effect might occur. The study involved removing muscle tissue from 77 pigs, and subjecting it to hypoxia (a reducti...
Geneticists identify 'master switch' that causes female flies to behave like males
...wings?'' he says. Other behaviors-such as nesting, hibernation
and nurturing-may be under the same type of genetic control, he concludes. Although the fruitless gene has not yet been found in humans, a corollary may exist. At the cellular or genetic level, fruit flies are similar to other animals, including huma...
Warming most evident at high latitudes, but greatest impact will be in tropics
...d seems to be altering some wildlife migration and hibernation
patterns. "You see this and you think the higher ...s that bloom earlier and animals that change their hibernation
or migration patterns in response to warming temperatures could be an illustration of the adaptabili...
When do mosquitoes prefer a blood banquet, or a sugar feast? Three genes make the call
... and me, but when they're programmed to begin this hibernation
phase we call diapause, the blood response shuts down. They can't tolerate a blood meal at that time. They switch completely to sugar, so that's a pretty dramatic metabolic shift," Denlinger said. "Then they spend the winter in culverts and caves, an...
Darkness unveils vital metabolic fuel switch between sugar and fat
...ame metabolic system, whether we are talking about hibernation
or not," said senior author Cheng Chi Lee, Ph.D., ...nce of increased fat consumption, all hallmarks of hibernation
in larger mammals. The authors note that 5'-AMP has previously been shown to regulate enzyme activit...
Undergraduate researcher turns up the heat on hibernation
If doctors could put people in hibernation
and pull them out at will, scientists think they could minimize damage from strokes, help recipients' bodies accept transplanted organs, perhaps even enable astronauts to travel in suspended animation until reaching distant destinations. But up to no...
Possible brain hormone may unlock mystery of hibernation
The discovery of a possible hibernation
hormone in the brain may unlock the mystery behind...sonal adaptation, according to the researchers. As hibernation
factors endow animals with an incredible ability to cope under otherwise lethal conditions--ratcheti...
Reversing 'hibernating' heart muscle focus of UB researchers
... myocytes undergo in order to remain viable during hibernation
limit their long-term ability to recover fully after revascularization. John M. Canty, M.D., Albert and Elizabeth Rekate Chair in Cardiovascular Disease in the UB School of Medicine and Biomedical Sciences and chief of the Division of Cardiovascular...
Breaks in hibernation help fight bugs
...es rapidly in warm temperature, a regular break in hibernation
would be an important adaptation to combat the ger... animals would still have to regularly break their hibernation
to ensure protection at all temperatures, Luis explains. "Our model, which is confirmed by field...
What animals can tell us about hemorrhage, organ transplants and aging
...viable outside the body for much longer during the hibernation
season and the squirrel can tolerate a much greate...when the hibernating squirrel briefly arouses from hibernation
during the winter and its physiology has returned to normal. These findings could one day extend t...
Scientists find potential 'off-switch' for HIV virus
...to assert themselves immediately, forcing HIV into hibernation
with high frequency and reducing the threat to the host." Weinberger said that drugs already exist that target other cellular enzymes, so there is reason to hope the approach will work. "There is precedent for this type of treatment," he said. ...
Insects cultivate 'antibiotic-producing bacteria' in their antennae
...ntly enhance the larvas chances of survival during hibernation
in the soil, possibly by producing antibiotics. All beewoolf species investigated so far show up positive for the bacteria which indicates it is essential for their survival and could play an important role in other insect species too....
Study shows hibernating bears conserve more muscle strength than humans on bed rest do
...d Game) and his coauthors find that black bears in hibernation
lose about one-half as much skeletal muscle streng... Middle Park, Colorado, both early and late in the hibernation
cycle. After sampling, bears were placed back in their den, and the entrance was covered with pine b...