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Tag: "animals" at biology news

Hirsute Or Hairless? Two Proteins May Spell The Difference

...nd needs special care to thrive as a pet. Hairless animals in the lab, on the other hand, can be very instructive. Understanding how hair develops sheds light on the fundamental processes that generate a wide range of tissues and organs, including the lungs, cornea, and mammary glands. How complex, three-di...

Norovirus, AIDS vaccine and Hepatitis Virus

... with the noninfectious vaccine, while two control animals remained unvaccinated. Both groups were challenged with SHIV. All four of the immunized macaques became infected with the challenge virus, but three survived. The two control subjects died. "The results showed strong evidence that this type of vacci...

PET/MRI scans may help unravel mechanisms of prenatal drug damage

... mother and fetus simultaneously," she added. The animals were anesthetized prior to scanning. MRI scans wer... body in about two hours. After the procedure, the animals were returned to their social colony to deliver their offspring. The combined images show that coca...

Camera Traps Catch Eye of the Tiger

...y, in which they attempted to find evidence of the animals in a specific area. This information was used to d... moved occasionally because the flash often alerts animals to their presence, causing those animals to avoid the area in the future. Due to the moist, hot cli...

Chemists identify immune system mechanism for methamphetamine binges

...ty, the world's largest scientific society. "Test animals injected with methamphetamine actually developed antibodies to the drug, which is highly unique for a molecule of its relatively small size," says study co-leader Kim Janda, Ph.D., a chemist at Scripps in La Jolla, Calif. Developing antibodies to the...

A frog's life is food for thought

...g can have deadly consequences for humans and most animals but not Australia's green-striped burrowing frog. ...ffects of prolonged food deprivation on the gut of animals that go without food for long periods. Ms Cramp's study is helping explain why animals such as the g...

Flocking together: Study shows how animal groups find their way

...f Nature, helps settle age-old questions about how animals coordinate their actions. Previously, scientists h... for subtle signals or other explicit systems that animals may use in disseminating information through groups. The new study showed that such complexity is no...

Stem Cell Research Shows Potential for Replacing Tissue Damaged in Heart Attacks

... has found that embryonic stem cells (ES cells) in animals can be cultivated to form new tissue, which eventually may help doctors learn how to replace tissue damaged as a result of a heart attack. The potential for ES cells to replace damaged or diseased cells in adult tissues has caused extraordinary inte...

Fibril Shape Is The Basis Of Prion Strains And Cross-species Prion Infection

...o demonstrated that a "preseeding" process between animals with different prion amino acid sequences could ov...idge the infection gap between previously separate animals like humans and elk and deer, which suffer from a prion disease called chronic wasting disease. Sur...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

...studies that evaluated the technique in people and animals with various infections. In the past, microbiologists would expose bacteria to certain concentrations of an antibiotic and then determine the minimum concentration that prevents bacterial growth. That number was taken and compared with concentrations...

Researchers identify protein crucial for survival of Lyme-disease bacterium

...s salivary glands, where they are transmitted into animals or humans during the tick's feeding process. The e...t maintain itself in nature and hence can't infect animals or humans." UT Southwestern molecular microbiology graduate student Andrew Revel, a lead author of ...

Gene therapy promising for growing tooth-supporting bone

... own bone growth mechanisms. The study showed that animals that got the BMP-7 treatment produced nearly 50 percent more supporting bone around dental implants than those receiving the conventional treatment. "This study represents a proof-of-concept investigation. We are encouraged about the promise of this...

New insight into regulation of blood stem cells

...al Cell expands on previous studies by using adult animals to examine the role of a key gene known to be requ...hers used random mutagenesis and screening to find animals with hematopoiesis defects, and they used genetics to identify the causative gene. One line mapped t...

Birds brains reveal source of songs

...rganism that enables a direct investigation of how animals learn motor activities." The songbird's creative, trial-and-error type of learning provides an ideal model for studying similar processes in humans, such as how a baby's babble takes on the conversational cadences and recognizable syllables of mama ...

Buying Time Through Hibernation on Demand

...ulfide, a chemical normally produced in humans and animals that is believed to help regulate body temperature and metabolic activity. Within minutes of breathing the hydrogen sulfide and room-air cocktail, the mice stopped moving and appeared to lose consciousness, their respiration dropped from the normal ...

U-M team recovers ancient whale in Egyptian desert

...ulfide, a chemical normally produced in humans and animals that is believed to help regulate body temperature and metabolic activity. Within minutes of breathing the hydrogen sulfide and room-air cocktail, the mice stopped moving and appeared to lose consciousness, their respiration dropped from the normal ...

Strongest proof yet found for prion hypothesis

...onfirm its validity by causing a TSE in normal lab animals by infecting them with malformed proteins (dubbed "prions" by Prusiner) created entirely in a test tube. Such an approach eliminates the possibility that some other agent might be causing the disease. In a paper scheduled to appear in the journal Ce...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...a basic mammalian response that developed in other animals and our ancestors inherited in order to speed up the mating process." Einstein's Brown concluded, "Our results suggest that romantic love does not use a functionally specialized brain system. It may be produced, instead, by a constellation of neural...

Scientists identify genetic pathways essential to RNA interference

...ne expression. RNAi occurs naturally in plants and animals and may help control resistance to viral infection, among other functions. For the current study, lead author John Kim, PhD, and his colleagues developed a strain of C. elegans into which they added a gene that caused the worms to glow under ultravi...

Brain-mapping technique aids understanding of sleep, wakefulness

...ound that a type of neuron responsible for keeping animals awake receives inhibitory signals from neurons act... that produce the protein orexin, which helps keep animals awake. In humans, a lack of, or deficiency in, orexin causes narcolepsy, a rare disease in which peo...

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