Tag: "animals" at biology news

Newly Identified Molecular Mechanism Could Lead To New Approaches For Preventing Heart Attack, Stroke

...e questionof what happens when platelets in living animals or people cannot respond tothrombin has not been answered. We suspect thrombin plays a critical role, butthat role has yet to be proven conclusively." Co-investigators of the UCSF study were Mark L. Kahn, MD, an assistantresearch physician, ...

New Research On Environmental Pollutants

...ces, will force researchers to look for effects in animals at a lowerstage in the food chain, since this is where influence can be made. Currentstudies of long-lived substances, he believes, will focus on work places andother local sources. Ross Norstrom, Environment Canada, Hull, Canada Global Convention ...

Study Finds Evidence Linking The Brain's Cognitive Control Regions With Stress Control Regions

...on and excitation is asurvival strategy built into animals through millions of years of evolution,allowing responses to be generated on demand and quickly turned off. Problemsarise when the system gets changed to such an extent that the animal no longeris able to activate the inhibition, which means more str...

Duke Study Helps Explain How Cells Divvy Up Genes During Reproduction

...w it is very difficult to do these experimentswith animals more advanced than flies because they make eggs internally. Thatmakes it difficult to observe the process. But using flies, in which the processis thought to be closely related to higher animals, we can identify thecomponents and learn how they work....

University Of Texas Southwestern Researchers Find Genetic Switch That Explains Effect Of Exercise On Muscles

...alth. "We have shown both in cultured cells and in animals that there is a signalingpathway we can modify to stimulate or reverse what exercise does naturally. Webelieve it is possible to design a drug which would have this effect." The study provides evidence that three proteins called calcineurin, NFAT(Nuc...

New Polymer Implants Can Rescue Dying Brain Cells, Researchers Say

...ets implanted in the brains of test animals; since animals are notaffected by Alzheimer's disease, the implants were placed in the area of thebrain which, in humans, is vulnerable to the disease. Dr. Saltzman saidprevious attempts to deliver NGF to the brain by pumping a water-based NGFsolution into the ve...

First-Ever Scientific Estimate Of Total Bacteria On Earth Shows Far Greater Numbers Than Ever Known Before

...nesthat cause disease, but the bacteria inside all animals combined -- includinghumans -- makes up less than...of soil, and other habitats suchas the air, inside animals and on the surface of leaves. The study brought somesurprises. "By combining direct measurem...

How Mammals Learn To Recognise Their Mother

...y a role because otherwisethey would avoid unknown animals and prefer the empty cage. Because most mammal mothers make a clear distinction between theirown progeny and those of other mothers, it is vital for the young to learnwhich particular animal is their mother. In an environment where morethan one moth...

Study Demonstrates High Conservation Potential Of Logged Rainforest

... large enough to maintainpopulations of plants and animals in the future. "We also need to know more about the areas surrounding these protectedforests and investigate their conservation potentials," he said. Dartmouth's Peart added: "If our results hold up to further testing,logged for...

Artificial Heart Chamber And Artificial Blood Vessels Aid Cardiovascular Surgeons

...d material have carried bloodto the hearts of test animals for over two years. The polymer vessels aredesigned to be used in heart bypass operations, which are performed more than500,000 times a year. The artificial vessels are designed to substitute for thesaphenous vein, the major vein in the leg that i...

Tourists And Scientists Could Be Bringing Deadly Diseases To Antarctica's Wildlife

...The Hobart meeting reviewed mounting evidence that animals in Antarcticaand subantarctic islands are being exposed to new pathogens. A team from UmeOUniversity in Sweden has found Salmonella and Campylobacter bacteria in faecalsamples collected since 1996 from Antarctic fur seals, gentoo and macaronipenguins...

Gene Therapy Showing Promise In Fighting Melanoma

...y, the researchersreported the vaccine helped some animals live longer and shrunk the tumor inabout 20 percent of animals treated. "This is important work with melanoma, because there currently are no othertreatment altern...

Chumminess Of Roundworms Linked To Single Gene, Offering Insight Into Mechanisms Of Social Behaviors

...nverted a solitary straininto a social strain, the animals exhibited all of the behavioral differencescharacteristic of the social strain. They gathered in groups, moved rapidly onE. coli and burrowed themselves into the cultured turf. The two nematodes types often shared similar environments -- in...

Simple Chemical Switch Steers Migrating Neurons

...," saidPoo. He also noted that experiments in live animals would follow,and-assuming those studies are promising-eventually clinical trials inhumans. In vivo studies will be needed to test whether the switching mechanismdiscovered in the cell culture model is actually being used by thedeveloping organism...

Vets Defend The Use Of Antibiotics In Animal Husbandry

... Different antimicrobials are used for humans and animals but there can be a risk of common resistance. Prophylactic use of antibiotics is common in intensive farming to control the spread of infection. As these antibiotics are being used at higher, therapeutic dosages, Dr McKellar argues that prophylacti...

Loss Of Tumor Suppressor Gene Triggers Colon Cancer

...ngassociated with cancers of various sorts in both animals and humans. "This connection is fascinating and we hope it leads to furtherunderstanding of this pathway," says <AHREF="/science/genetics/vogelstein.htm">Bert Vogelstein , an HHMIinvestigator at The Johns Hopkins Oncology Center. The report ...

Evidence Mounts Against Maintstream Dogma In Embryology, Could Shed New Light On Neurological Defects

...yclopia (fused eyes). Cyclopia appears not only in animals such as the zebrafish, but also in humans who develop a syndrome called holoprosencephaly. Some cases of holoprosencephaly have been found to result from mutations of the human sonic hedgehog gene. However, other chromosomal regions, including as y...

Cattle Diets Could Control E. Coli Danger

... normal bacterium in the gastrointestinal tract of animals andhumans, and most types are not harmful (See ""E...IONS AND TRILLIONS: The gastrointestinal tract of animals and man is anideal habitat for the growth of bacteria, and cell densities can be as high as atrillio...

Out On A Limb: Young Burro Receives Artificial Leg At Colorado State

...ns concerned. The problem with prosthesis on large animals such as horsesand donkeys is that they're not designed to walk on three legs, he said. Dogs,on the other hand, can often get around despite the loss of a hind leg and, forsmaller canines, even a front one. "Horses, and perhaps donkeys, can r...

Evidence For Earliest Maritime-Based Societies In The Americas Reported In Science Magazine

...re burned and showed cut marks,indicating that the animals were butchered. Evidence of catastrophic floods anddebris flows at Quebrada Tacahuay suggests that the site's inhabitants abandonedit for about 3500 years and that El Nio was active during this time. After tracing obsidian flakes found at Quebrada Ja...

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