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Tag: "reaction" at biology news

Male owls pitch their hoots to advertise body weight to competitors

...ess the function of vocal signals), monitoring the reaction of subjects to the broadcast of vocalizations. To do this they modified the pitch of several hoots, creating stimuli that mimicked the hoots given by males from a range of body weights. They then played back these recordings to males with established...

Scientists see DNA get 'sunburned' for the first time

...l time. They observed the most common chemical reaction among a family of reactions on the DNA molecule th...re linked to sunburn, and discovered that this key reaction happens with astounding speed -- in less than one picosecond, or one millionth of one millionth of a...

Genome sequencing reveals key to viable ethanol production

...eak down some of that wood. A product of that tiny reaction is a sugar called laminaribiose that diffuses into the cell. There it deactivates a repressor for two genes, which wake up and start pumping out the two triggers the full production of wood-degrading enzymes CelC and LicA. Wu’s paper shows the firs...

UCLA study uncovers clues for why Graves' disease attacks the eyes

...ver the normal T-cells, sparking the body’s immune reaction against itself." The next step is to identify what the T-cells are reacting to and how the receptor enables the cells to survive beyond their normal lifespan. The team plans to develop an antibody drug to block the receptor from interacting wit...

Peanut allergies overstated, study finds

...specially if their child has never had an allergic reaction to peanut before," Dr Wainstein said. ...

Slowing the racing heart

...the rapid beating of the heart's "fight-or-flight" reaction to adrenaline. A single cell in the upper right chamber is responsible for setting the pace of the beating heart, triggering its neighbor cells to beat. In the human heart, one cell -- the pacemaker cell -- beats faster or slower to induce a rhythm...

Protein enables discovery of quantum effect in photosynthesis

...rgy hops from light-capturing pigment molecules to reaction center molecules step-by-step down the molecular energy ladder. "The classical hopping description of the energy transfer process is both inadequate and inaccurate," said Fleming. "It gives the wrong picture of how the process actually works, and ...

Technique monitors thousands of molecules simultaneously

...nd then using the electrode to initiate a chemical reaction that modified the substrate and converted it into ... using the electrode. This allowed for the desired reaction at only electrodes that were turned on. To keep the palladium(II) from going to a neighboring electr...

'Personality-gene' makes songbirds curious

...vation room. In a second test, they quantified the reaction of the bird towards each of two unknown objects that had been put in its cage. One such novel object was a pink panther (see figure 2). The results from the group of selected birds were confirmed with data from free-living, unselected great tits....

Runners -- Let thirst be your guide

...ng prolonged exercise. Another is nausea, a common reaction to extreme sports, which makes the body think vomiting will ensue, so water needs to be conserved, Verbalis says. Finally, a research team that included Verbalis recently reported in the American Journal of Medicine that release from muscles of a c...

Hormone helps mice 'hibernate,' survive starvation

...serves energy. The molecular driver behind this reaction to starvation, however, had been unknown. To find an answer, UT Southwestern researchers and other scientists examined potential molecular cues and cellular interactions at play during starvation and fasting. They focused on a nuclear receptor ...

Old memory traces in brain may trigger chronic pain

... remained in the dark chamber. “Their aversive reaction to the stimulation disappeared,” Apkarian said. Based on the animal results, the next step will be to test the drug in clinical trials, Apkarian said. “When we do this in a clinical trial, we expect people to say I still have the pain, but it...

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