Tag: "animals" at biology news
Circadian clock controls plant growth hormone
...ed how auxin affects plant growth. Most plants and animals
have an internal clock that allows them to match their activities to the time of day or season of the year. The circadian rhythms appear to act by "gating" the effect of auxin, the researchers said. In other words, the plant becomes more responsive...
Tropical insects 'go the distance' to inform rainforest conservation
...ity doesnt necessarily increase with distance, but animals
in small reserves tend to go extinct, you should plan for one large area instead of having a lot of small and distant areas to manage and conserve. Cognato and Hulcr expect similar patterns in other tropical lowland rain forests, as they are ty...
OHSU turns mouse into factory for human liver cells
...ells must be used instead of cells from laboratory animals
because liver enzymes that break down these compou...e strain that develops liver disease only when the animals
don't receive a protective drug called NTBC, allowing liver disease to be turned on and off. "Our ...
Antioxidant overload may underlie a heritable human disease
...re, and an early death. They further show that the animals
hearts are under reductive stress. The find init...ey showed that the offspring of the heart-diseased animals
and mice with lower levels of one of the antioxidant enzymes, glucose-6-phosphate dehydrogenase (G6P...
What we can learn from the biggest extinction in the history of Earth
... formations 250 million years ago. Land plants and animals
suffered similar losses. Douglas Erwin, curator of the Paleozoic invertebrates collection at the Smithsonian National Museum of Natural History, has dubbed this event "the greatest biodiversity crisis in the history of life." An unusually long period...
New technology reveals seal behavior
...cs of water in the Southern Ocean. The majority of animals
from South Georgia fed within the Antarctic Circum...to understand current population trends, where the animals
forage and predict the availability of food under various climate change scenarios. Dr. Mike Mered...
News tips from the Journal of Neuroscience
...postinjury indicators of neuropathic pain, whereas animals
lacking the MAC component C6 did not. Having ruled out C3a and the MAC as major pain effectors, the authors injected naive rats intrathecally with the C5a anaphylatoxin. C5a increased cold pain sensitivity, and a C5a receptor antagonist blocked this ...
Secret life of elephant seals not secret anymore!
...buoyant) and where food was harder to find and the animals
lost fat. These measurements have allowed us for the first time to make circumpolar maps of the areas that provide good foraging for seals, and areas where conditions are less favourable for them, Professor Hindell said. The oceanographic measure...
Bacteria may not hasten death
...pend energy doing something, it should shorten the animals
life, said co-author and USC biologist Steven Finkel. A research team led by John Tower, associate professor of molecular and computational biology at USC, compared normal fruit flies to ones kept in an axenic (bacteria-free) environment. The su...
In limiting life span, study finds booming bacteria innocent
...ues and organs. However, we found no effect on the animals
longevity even when their bacteria are taken from one extreme to the other. Nevertheless, he added, the bacterial infestations seen in the aged flies have to be a quality of life issue....
High-intensity ultrasound may launch attack on cancer, wherever it lurks
...colon cancer that mechanical HIFU delivered to the animals
tumors sparked an immune response twice as strong as did thermal HIFU, presumably by releasing a much more diverse range of danger signals. Our results show that while mechanical HIFU is not as effective as thermal HIFU in killing tumor cells direc...
American Chemical Society's Weekly PressPac -- Aug. 1, 2007
...roughput methods from pharma could reduce need for animals
when assessing toxicity of chemicals in the environment This story will be available on August 6, at http://pubs.acs.org/cen/science/85/8532sci1.html FOR ADVANCE INFORMATION, CONTACT: Michael Bernstein ACS News Service Phone: 202-872-6042 Fax: ...
UF, French scientists seek test to detect gene doping in athletes
...s first introduced into macaques, for example, the animals
produced so many red blood cells that their veins clogged, and many eventually died after developing massive allergic responses to the therapy. I think many athletes know of the technology. Theyre aware and theyre concerned. WADAs aware and conce...
Genetic analysis finds greater threat in frog-killing fungus
...ation. If the fungus is endemic to a region, the animals
in the area would normally be resistant to its destructive effects because they would have co-evolved together. However, biologists theorize that changes to the environment - from global warming to pollution from agricultural chemicals - could make n...
Disabling a sensory organ prompts female mice to act like male mice
...asal organ is a pocket in the nasal cavity of many animals
that is packed with receptor cells. It is the key ...t that the biggest differences in behavior between animals
of a given species are gender based," Dulac explained, but little is known about the underlying diff...
Multicenter study nets new lung tumor-suppressor gene
...er. They tracked the development of lung cancer in animals
with mutated LKB1 and compared it to the experience of animals
with abnormalities in either of two well-known tumor-suppressor genes. They found that while Kras ...
Why nectar-feeding bats need a 'power drink' to fly
... of energy. According to Voigt and Speakman: All animals
need energy to power their metabolism. Ultimately this energy comes from food, but usually only a small fraction of the energy being used comes directly from the food. Normally, most of the food is converted into storage and this is drawn on later to...
Coelacanth fossil sheds light on fin-to-limb evolution
...ting discovery is that people think of coelacanths animals
as archetypal living fossils, said Matt Friedman, ...e gap between primitive ray-finned fish and limbed animals
like Tiktaalik roseae, the new data forces scientists to reassess the characteristics of the coelaca...
Altering a protein makes mice less fearful
...nborn rather than learned. For example, laboratory animals
fear certain predators even though they have never...ot affect the mouse's sense of smell. "These lab animals
have never been exposed to a predator. The freezing response seems hardwired and intuitive," said Ma...
Einstein researchers' prototype vaccine could provide improved protection against tuberculosis
...ersisted in the tissues of secA2 mutant-vaccinated animals
than in the tissues of animals
vaccinated with BCG. And compared with BCG, animals
vaccinated with the mutant vaccine had much larg...
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