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Tag: "pass" at biology news

The higher the hierarchy, the greater the aggression

...k--or place in the social hierarchy. They can only pass on their genes when they reach the top of the hierarchy, usually after those ahead of them in the rank have died and they have inherited the right to reproduce. "Certain group members inflict or receive many more acts of aggression than others. In ...

Scientists discover new regulating mechanism in cells

...troviral proteins. The mRNA in both cases does not pass through the processing step of the four-step protein-making process. Normally, that processing step also adds a signal to the mRNA that facilitates the final making of the protein. Because mRNAs like those for junD and the retrovirus are not proces...

Nice guys do finish first in lizards' evolutionary race

...id, the altruistic lizards know they're working to pass on their genes, even though their partners aren't family. The tag-team approach does effectively thwart the orange-throat bullies, albeit at a personal cost. The term "greenbeard" refers to an evolutionary term of a trait so obvious that others can ...

Tastes great! Study shows brain's response to pleasing -- and changing -- tastes

...ty to nice. The amazing fact is that these neurons pass that test." Aldridge notes that an analogous effect occurs in everyday human life, when a formerly favorite food becomes less attractive after we have over-indulged in that food. "Moment by moment, this low-level information processing in the br...

Air travel and pandemic flu

...an) flu. At present the virus responsible does not pass easily from birds to humans, and it does not seem to pass from one human to another. However, the fear is that the virus might change and that human-to-human ...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

... through but large enough so the air bubbles could pass without difficulty. These trials demonstrated th...een with openings too small for the air bubbles to pass through, however, the moles' performance dropped down to the level of chance ?the same as their perf...

Critical hearing gene helps send auditory messages to brain

...messenger, or neurotransmitter, that would usually pass that information to auditory nerves and on to the brain, they reported. The sensory structures within the mutant animals' ears otherwise appeared to develop normally. "Study of the genes responsible for deafness can bring new insight into the molec...

Molecular mechanism provides intra-cellular traffic signal

... much as vehicles on a crowded road are allowed to pass quickly through a succession of green traffic ligh...he letters Ypt allow membrane-enclosed vesicles to pass in and out of cellular compartments. Activator proteins flip the switches on. One activator protein,...

Stanford discovery may help predict when toxoplasma can be deadly

...en infected for the first time while pregnant can pass the organism to their fetuses, potentially resulting in sight and hearing problems as well as learning disabilities. The new findings have implications for determining how to treat these and other infected people: More aggressive therapy may be w...

Exposure to dioxins influences male reproductive system, study of Vietnam veterans concludes

...largement of the prostate. Patients must strain to pass urine and they also must urinate frequently. BPH can lead to complications such as an inability to urinate and urinary tract infection. Surgery is sometimes needed. Dr. Claus Roehrborn, professor and chairman of urology at UT Southwestern and a st...

Mayo discovers protein as potential tactic to prevent tumors

... that leads to repair of damaged DNA." If cells pass this quality control checkpoint, they can resume t...or the greater good of the organism rather than to pass on errant genetic codes that can lead to disease. Genetic errors that sneak past the cell's quality ...

Teenager moves video icons just by imagination

... the Space Invaders game to both help the patients pass the time away and garner some very useful, pioneering data. Computer science and engineering master's degree candidate Tim Blakely pulled several all-nighters to program the game into the ECoG system. "Doing this is a win-win situation , both for sci...

New technique boosts size of proteins that can be analyzed

...ere they pick up charges and are vaporized as they pass through a heated capillary. Then they are hit by air molecules in low-energy collisions to keep the protein from folding up; then they are slammed with air molecules in high-energy collisions to dissociate the protein. Next, the mass spectrometer wei...

New drug blocks influenza, including bird flu virus

...an protein whose role in biology is to help things pass through membranes such as those that encapsulate cells. Although the peptide's precise mechanism for thwarting flu remains to be deciphered, it seems to work by blocking the virus' ability to latch onto a key cell surface molecule that the virus us...

Hair-growth drug artificially lowers PSA levels in prostate cancer screening, study finds

...ion for this use. Patients with BPH must strain to pass urine and feel the urge to urinate frequently. BPH can lead to the inability to urinate and urinary tract infection. In 1997 the FDA approved finasteride for the treatment of male-pattern baldness. While Propecia is administered at 1 milligram per...

NHGRI aims to make DNA sequencing faster, more cost effective

...ale channels in which single molecules of DNA will pass between nano-electrodes that are less than 2 nanometers apart, to measure an electric current that will identify individual bases. Xiaohua Huang, Ph.D., University of California, San Diego, La Jolla,$275,000 (1 year),"Genome Sequencing by Ligation...

Researchers seek to design first treatment for neuroAIDS

...rve cells exposed to HIV may lose their ability to pass on nerve signals long before the virus causes them to self-destruct. To protect themselves from infection, exposed nerve cells pull in their branches (dendrites), which would normally connect them to other nerve cells. Such disconnected nerve cells, ...

Single molecule extends fat mice lives by reversing gene pathways associated with disease in obese

... have final lifespan numbers until all of the mice pass away, and this particular strain of mouse generally lives for two-and-a-half-years. So we are around five months from having final numbers, but there is no question that we are seeing increased longevity. The team also found that the HCR fed mice ...

Brain works more chaotically than previously thought

...ns of little "arms", known as dendrites. Dendrites pass on the electrical impulses to the cell body, or so...ons of the cell along which the electrical signals pass until they meet, at a synapse, the dendritic arm of another neuron. The synapse presents an insurmou...

Researcher examines polymers created with poultry feathers

...waste, such as poultry feathers or eggs that don't pass inspection. These agricultural wastes currently find uses in low-value animal feed or are simply disposed. Both come at a cost to the poultry industry that is passed onto consumers. The challenge in developing biodegradable plastics is creating a...

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