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Tag: "attempt" at biology news

Olfactory system detects pheromones that control reproduction

...tions with the vomeronasal system, which led us to attempt to confirm the experiment on a wide range of mice," she said. As a control, the researchers performed a separate set of experiments using a non-conditional strain of the pseudorabies virus. These studies confirmed that the virus was capable of infec...

Scientists narrow the time limits for the human and chimpanzee split

...he split of humans and chimpanzees since the first attempt in 1967. But this is only a minimum estimate, because it was based on a minimum calibration time. To obtain a maximum limit on the human-chimp divergence, the team used as a calibration point the maximum estimate, based on fossil studies, of the di...

Many needles, many haystacks

...uter to scan the sequences for small patterns. The attempt was successful: in the fly data, for example, 26 sets of proteins seemed to be interacting through linear motifs. "One challenge was to eliminate red herrings, which crop up everywhere when you look for very small patterns," Russell says. "The fact ...

Penicillin, amoxicillin: Step aside for strep throat treatment

...cation later on. Sometimes it's just a misinformed attempt to give children less medication, but more often parents believe the drugs are no longer needed since the children are feeling better, despite the medication label that urges parents to make sure the child finishes all the medications. The good inte...

Did feathered dinosaurs exist?

...on of the available evidence they offer an interim attempt to define morphologically the most salient features of Aves: "Birds are mesotarsal bipedal archosaurs with pennaceous feathers, and a tridactyl avian hand composed of digits 2-3-4." It is too early to abandon debate on the origin of birds, the auth...

Brazilians sequence genes of pig and poultry killers

...he researchers are now analysing the results in an attempt to identify bacterial proteins that could be used to develop vaccines and diagnostic kits against the bacteria. Mycoplasma hyopneumoniae causes pneumonia in pigs and costs the Brazilian pig-breeding industry US$200 million each year. Mycoplasma syno...

Gene therapy reverses genetic mutation responsible for heart failure in muscular dystrophy

... the authors say that this is the first successful attempt to deliver a therapeutic gene throughout the body. "Previous attempts at systemic gene therapy for muscle have not been very effective because blood vessel capillaries act much like a mosquito net, blocking the gene drugs from reaching the muscle ce...

New study to explore cellular circuitry

... team of biochemists and computer scientists in an attempt to diagram Saccharomyces cerevisiae, a type of yeast. Although a single-celled fungus, yeast shares many genetic traits with humans, making it a useful model. Researchers hope to build a computer model of gene and protein function, and then test pre...

Bone marrow stem cells may heal hearts even years after heart attacks

... Strauer said. Current heart attack interventions attempt to restore blood flow to the heart muscle as soon as possible, in order to limit the amount of permanent scarring. However, neither clotbusting drugs nor angioplasty can restore heart tissue that has already been damaged. Earlier studies demonstrated...

Software 'agents' could help unmask reality of disease clusters

...pond to changes in their environment, generate and attempt to achieve goals, and have the capacity to interact with other agents and even co-operate. This means that agents could be sent to the original data repository in order to carry out the analysis there, and then send back an aggregate report that doe...

US/African project deciphers deadly parasite genome

... describe the T. parva parasite and made the first attempt to develop a vaccine. Veterinary bacteriologist Arnold Theiler later made significant discoveries about the parasite, which is named for him. Vish Nene, a former ILRI scientist who came to TIGR in 2001 to join the T. parva project, says the genome s...

Purdue researchers find key to rice blast fungus

...gus enters the rice leaf cells, the infected cells attempt to defend the plant by dying. This means death for young plants, while in older plants, rice grain is lost. The biggest rice blast problem is in Asia and Latin America where rice is an important food staple. About two-thirds of the people in the wor...

DDT-resistant insects have additional genetic advantage that helps resistance spread

...e-introducing (or continuing the use of) DDT in an attempt to reduce the major health problems caused by malaria. Use of DDT (Dichloro-diphenyl-trichloroethane) increased enormously on a worldwide basis after World War II, primarily because of its effectiveness against the mosquito that spreads malaria and ...

Drugs from the deep blue

...thing with interesting properties, the researchers attempt to isolate and identify the molecule. The next step is to start from conventional chemistry and make the compound in the lab, then try to find the simplest structure with the same properties. This work can pull in techniques from different areas of ...

Scavenger cells could be key to treating HIV-related dementia

... the brain where many memories are stored in their attempt to attack the virus there, according to findings reported in the Journal of Virology this month. Researchers found that HIV-infected macrophages in the brain continuously travel to the temporal lobe, a part of the brain Alzheimer's disease often dam...

Israeli scientists successfully transplant frozen-thawed ovaries in sheep

...pertise for the project, said the next goal was to attempt to transplant ovaries in women at risk of losing t...ne had severe adhesions and it was not possible to attempt oocyte collection, but two yielded one oocyte each and repeat aspiration four months later produced ...

Research suggests fitness of Florida panthers improved by limited breeding with Texas animals

...mself skeptical about the success of such a rescue attempt in his 1991 book, "The Balance of Nature? Ecological issues in the conservation of species and communities." He acknowledged in his interview and in the new paper that "I was wrong." The paper's other authors are Luke Dollar, a doctoral student in P...

For first time, brain cells generated in a dish

...mpiled the images into movies. Traditional ways to attempt neurogenesis have been unable to so closely duplicate the natural process. They also haven't allowed scientists to monitor the entire sequence of cell development from primitive states to functional neurons and expose the electrophysiological propert...

Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses

...ories (RML) in Hamilton, MT, NS5 blocks the body's attempt to signal for immune defenses, preventing the immune system from both stopping the spread of virus and helping the body recover from infection. Interferon is so critical for recovery from these infections that it is being tested in clinical trials t...

Gap-climbing fruit flies reveal components of goal-driven behaviors

...ap, and they were thus forced to decide whether to attempt to cross the gap "by foot." The researchers found that the flies first visually measure the gap width and then only cross the gap if it is a traversable width. If the chasm is short, flies engage in an extraordinary crossing behavior that the researc...

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