Tag: "rodents" at biology news
Dangerous Chemical Combination Presents Possible Scenario For Gulf War Illnesses
...ical Center inDallas. Chickens were selected over rodents
as test animals because their susceptibilityto neurotoxic chemicals more closely resembles that of humans, the scientistssaid. The findings were prepared for presentation Wednesday at the annual meetingof the Federation of American Societies for Exp...
Hibernation: The Opposite of Sleep?
...es studies arctic ground squirrels, groundhog-like rodents
that live in the Brooks Range of Alaska, 200 miles north of the ArcticCircle. During hibernation a ground squirrel lowers its body temperature below freezing and stays that way for weeks, virtually braindead, with no detectable brain waves or signs o...
...ate University, the nearly hairless and sightless rodents
would rather recruit family members to the site o...ted conditions in Africa, where the chisel-toothed rodents
dig miles of burrows in search of the small bulbs and tubers that sustain them. Tuber patches in m...
Skull Of Refrigerator-Size Ancient Armadillo Finds A Home At UF
...ued to live in South America, as did llamas, large rodents
called capybaras, and tapirs, the pig-size animals closely related to horses and rhinoceroses, all of which once roamed Florida, he said. Because people lived in Florida 11,000 to 12,000 years ago, early humans encountered giant armadillos fo...
Fruit Flies May Shed Light On Cocaine Addiction
...fully addictive street drugs. Extensive studieson rodents
and monkeys have provided little information about...nsitization, or "reverse tolerance," also occursin rodents
and humans and may underlie the paranoia and pyschosis seen inlong-time cocaine addicts. It is the ...
DT104 Advice:How To Slow Salmonella Spread
...manure-storage areas andthe droppings of birds and rodents
at the farm. -- Breaking the cycles: The ubiquitous salmonellae are found almost everywherein the environment -- in soil, water and their animal hosts -- andepidemiologists now believe the eradication of salmonella is impossible toachieve. Rather...
SFSU Biologist Deciphers Desert Animals' Whistles And Drumbeats
...mps, supporting the conclusion that these solitary rodents
don't use stomping to warn each other of an approaching predator. Randall used playback experiments to test the gerbils' responses to different kinds of sounds. She played the taped sounds of moderate and then rapid whistles, and found the an...
Three-Day Treatment Cures Decades-Old Case Of Malaria
...his success in scouring alleyways to trap and test rodents
for testing. Other authors of the paper include Jun Li, Thomas F. McCutchan and David C.Kaslow(National Institute of Allergy and Infectious Diseases). Media Contact: Marc Kusinitz (410)955-8665 E-mail: firstname.lastname@example.org...
Hormones Found In The Brain May Determine How Much You Eat And Affect Obesity And Diabetes
...ortant part of upcoming research will be toproduce rodents
missing three genes -- one ligand and the two receptorgenes -- to see if the rats' appetites can be decreased by inhibitingany of them. "These neuropeptides are a very plausible molecular basis forsome classical experiments on eating habits,...
Yerkes Primate Research Center Of Emory University Reseachers Find Hunger Regulated By Novel Neurotransmitter
... Pastor Couceyro was one of the first to notice in rodents
that CARTmRNA increased in a specific area of the ...eeding-related peptides and their receptors. Using rodents
for suchstudies is necessary for these early studies because "humans don't necessarily eat just when...
Gene Study Shows Mammals Lived Before Extinction Of The Dinosaurs
...e. For example, Hedges says "the fossil recordfor rodents
says that mouse and rat split only 10 million years ago, but we have343 genes in this study telling us that mouse and rat split from their lastcommon ancestor 41 million years ago--four times as long. The rodent fossilrecord appears to have some maj...
Transgenic Mice With Widest Known Range Of Vision Among Mammals Created To
Investigate Human Vision Problems, Evolution Of Sight
...topigment into laboratory mice, creatingtransgenic rodents
that have the widest known spectral range of vision of anymammal. Electrophysiological test indicates the pigment functions normally inthe mice and the gene is transferable from one generation to another, accordingto the researchers from th...
Fetal Lead Exposure May Reduce Immunity
...t even short-term exposure of pregnant females, in rodents
or in other species including humans, could compromise offspring immune function." Ongoing work in the project is focusing on a likely "window of susceptibility" during development, when the immune system is assembling its defenses and disruption by ...
Relapsing Fever Spirochete Switches Surface Proteins When It Changes Hosts
.... Schwan. Tree squirrels, chipmunks and other wild rodents
found in coniferous forests inthe higher elevation...e. The soft-bodied ticks thatassociate with these rodents
can remain alive and infectious for years withoutfeeding. Human cases of illness tend to peak in the...
Oxygen-Carrying Myoglobin Not Necessary For Survival
... The only alteration researchers found in the rodents
lacking myoglobinwas that the heart and endurance muscles were nonpigmented or almost whiterather than a rich pink because most of the red color actually comes from themyoglobin. "Our research suggests that the system transferring the oxygen ...
Genetic Code Of Chromosome Of Malaria Parasite Deciphered
...aria), and from P.berghei, which causes malaria in rodents
and provides a laboratory model ofhuman disease. NIAID also supports the sequencing of more than 20 othermedically important pathogens. Between 300 and 500 million new cases of malaria occur each year, primarily insub-Saharan Africa. Every 30 secon...
Alcohol Consumption, Resistance To Its Effects Related To Levels Of Neurotransmitter, Say UW Researchers
...n the brain. Together, these data indicate that in rodents
there is arelationship between NPY levels and the willingness to voluntarily consumealcohol." The researchers cautioned that while their results with mice areconvincing, further research is necessary to determine if there is arelationship ...
Life Among Dead Brain Cells: Discovery Could Help Improve Memory Capacity Of Stroke Victims
... generated following a stroke. But a new study in rodents
findsthat some brain cells are actually stimulated... as a12-fold increase in the birth of new cells in rodents
after stroke in an area ofthe brain -- the hippocampus -- which controls memory. "This regio...
Scientists Discover Protein In Mammals Tuned To Respond To What May Be Hottest Temperature Our Nerves Can Detect
...San Francisco have discovered areceptor protein in rodents
and humans tuned to respond to temperatures of 120degrees Fahrenheit and higher - by far the hottest temperatures for which anerve receptor has been identified. The protein may be part of a network of mammalian nerve receptors coordinated todetect a...
Suppression Of Natural Fires Harms Squirrels
...ive plants that do not supply adequate food forthe rodents
have overwhelmed natural, fire-resistant, seed-laden grasses. "Animals can run from fire, but they can't escape the disastrous effectsof habitat fragmentation and starvation. Unless these squirrels can link upwith neighboring populations and...
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