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Tag: "pitch" at biology news

Bird Brains Show How Trial and Error May Contribute to Learning

...show up a few notes later as a change in volume or pitch at a particular time in the song. The variations ...note in different directions, one area raising the pitch of a certain note and another area lowering its frequency. The moment-by-moment influence of this br...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ts emit a variety of infrasounds--calls too low in pitch to be heard by most humans. In 1989, Payne and her colleagues conducted a landmark experiment at a waterhole in Etosha demonstrating that these powerful infrasonic rumbles contain specific messages that can be heard and understood by other elephants ...

Team Invents Device For Weighing Individual Molecules

...y of mechanical vibration, although at such a high pitch that the "notes" are nearly as high in frequency as microwaves. The researchers set up electronic circuitry to continually excite and monitor the frequency of the vibrating bar. Intermittently, a shutter is opened to expose the nanodevice to an atom...

Bats use touch receptors on wings to fly, catch prey, study finds

...le to fly and turn effectively, but they tended to pitch forward because they couldn't control their in-flight balance. Zook's research also points to the importance of a second type of receptor cell in the membranous part of bats' wings. Nerve recordings revealed that these receptors respond when the mem...

Born with a love of speech

...hey also contain a fundamental frequency ?the core pitch of a voice, such as baritone or soprano, that helps us clue in to the identity of a voice. These non-speech stimuli were developed by Drs. Sonya Bird and Guy Carden in the Department of Linguistics and Dr. Janet Werker in the Department of Psychology...

Study shows hope for ridding lakes of clawed invader

...some degree sunfish - bluegills and pumpkinseeds - pitch in by eating the smallest crayfish. The Wisconsin DNR, by manipulating the bag and size limits for anglers fishing Sparkling Lake, has helped establish an optimal population of the fish that routinely dine on the crayfish. The trapping on Sparkling...

Master planners in brain may coordinate other areas' roles in cognitive tasks

... a symphony, with specialized sections required to pitch in at the right time to produce the desired melody, then the regions highlighted by the new study may be likened to conductors, researchers at Washington University School of Medicine in St. Louis assert. "They appear to be helping to determine whic...

Genomic comparison of lactic acid bacteria published

With public concerns at a fevered pitch over the bacterial contamination of spinach, it is easy to lose track of how bland and deprived our world would be without the contribution to our food supply of such benign microbial players as lactic acid-producing bacteria. Researchers from the U....

Mosquito repellents that emit high-pitched sounds don't prevent bites

...nic mosquito repellents (EMRs) claim that the high pitch sound they emit repels female mosquitoes, and therefore protects people in the vicinity from bites and disease. To test these claims a team of Cochrane Researchers conducted a systematic review looking for trials conducted with EMRs. They located ...

Research finds music training 'tunes' human auditory system

..., a single word can differ in meaning depending on pitch patterns called "tones." For example, the Mandarin...eans "rice." English, on the other hand, only uses pitch to reflect intonation (as when rising pitch is used in questions). As the subjects watched the ...

Male owls pitch their hoots to advertise body weight to competitors

...rom 17 territorial males and demonstrated that the pitch of the vocalization reflects the body weight of the male: the heavier the male, the lower the pitch of his hoots. In order to see whether this information is actually used by male owls during territor...

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(Date:4/18/2014)... contraceptive pills in Peru found that 28 percent ... quality or falsified. Many pills released the active ... ingredient. One batch had no active ingredient at ... researchers at the Georgia Institute of Technology developed ... assess suspected counterfeit drugs and then characterize their ...
(Date:4/18/2014)... to the story of how barnyard chickens came to be, ... journal Proceedings of the National Academy of Sciences . ... 200-2300 years ago in Europe, researchers report that just a ... different from the chickens we know today. , The results ... domestic chickens -- such as their yellowish skin -- only ...
(Date:4/17/2014)... 17 In the most densely forested and most ... two centuries of human needs, values and practices. Disturbances ... forests for agriculture and development, have set the stage ... Forest Service study reports. , The report Five ... management needs in the Northern United States ...
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(Date:4/18/2014)... scientists could lead to potential new treatments for breaking ... , Fibrosis, or scarring, is a hallmark of ... lungs can lead to serious organ damage and, in ... options centers on findings made by Swati Bhattacharyya, PhD, ... that a specific protein plays in promoting fibrosis. ...
(Date:4/17/2014)... variant specifically associated with the risk of a ... cent of all breast cancer cases. , The ... called invasive lobular carcinoma, gives researchers important clues ... of breast cancer, which can be missed through ... the journal PloS Genetics , was co-led ...
(Date:4/17/2014)... PLOS Pathogens , children who live in regions of ... immune response to infection with malaria parasites that may ... and illness and partially control the growth of malaria ... develop future interventions that prevent or mitigate the disease ... 200 million cases of malaria occur worldwide, resulting in ...
(Date:4/17/2014)... 2014) Two recent papers by a University ... may help scientists develop treatments or vaccines for ... encephalitis and other disease-causing flaviviruses. , Jeffrey S. ... genetics at the School of Medicine and an ... Institute, and colleagues recently published articles in the ...
(Date:4/17/2014)... team has created a new technology for modifying ... travel the body and selectively target cancer and ... devices that monitor and modify human physiology is ... no existing technology enabled bioengineers to build such ... respond in a customized fashion. , "The project ...
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