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Tag: "changes" at biology news

New mechanism for nutrient uptake discovered

...ighboring short-chain molecule, binds with it, and changes the shape of itself and its neighbor thereby activating all the pores in the complex," continued Loqué. "The pores can't function without this physical stimulation." "The rapid chain-reaction among the different pores allows the system to shut dow...

Angelman syndrome deficits rescued in mice

...yndromes that we still don't understand. Maybe the changes in CaMKII associated with Angelman syndrome could be implicated in other mental retardation syndromes as well." ...

Study shows hope for early diagnosis of Alzheimer's

... memory loss, and family members often believe the changes are simply due to aging,?Clark said. “Even the pat...tage of using a modified EEG to detect these early changes is that it is non-invasive, simple to do, can be repeated when necessary and can be done in a physic...

Blame the brain for high blood pressure

... As there is still poor understanding about what changes occur in people when hypertension develops, the finding of JAM-1 is of great interest and opens up multiple new avenues for further research and potential treatment. ...

Mailman School of Public Health researchers report blood DNA can be early predictor of liver cancer

...s as a baseline biomarker, the scientists examined changes in certain tumor suppressor genes that have been a...med by the team of Mailman School scientists found changes associated with cancer in serum DNA, presumably released from the tumor, one to nine years before ac...

Yale biologists 'trick' viruses into extinction

While human changes to the environment cause conservation biologists to worry about species extinction, Yale biologists are reversing the logic by trying to trap viruses in habitats that force their extinction, according to a report in Ecology Letters. To avoid going...

Keeping the body in sync -- The stability of cellular clocks

... phase syndrome. Circadian rhythms are cyclical changes in physiology, gene expression, and behavior that ...of output from these clocks are the daily rhythmic changes in body temperature, blood pressure, heart rate, concentrations of melatonin and glucocorticoids, ur...

Scientists use nanoparticle to discover disease-causing proteins

...c messages throughout the cell causing biochemical changes that can determine whether a cell behaves normally or abnormally. Proteins also are important in directing immune responses. The Purdue scientists report on their new strategy to discover proteins and protein levels, called soluble polymer-based i...

Darwin's famous finches and Venter's marine microbes

...at loss of one key residue could be compensated by changes around other conserved regions of the protein, and that some of these changes in bacterial kinases are also seen in specific human kinases. Says Manning, "By looking at all th...

Ancient amphibians evolved a bite before migrating to dry land

...and involved a series of adaptations to facilitate changes in locomotion, respiration, reproduction, sensation, and feeding," Markey says. "In water, suction is an efficient method of feeding, but it does not work in the much less dense air environment. Early terrestrial inhabitants would thus have had to de...

New findings blow a decade of assumptions out of the water

...-balance the ocean's nitrogen cycle if large-scale changes were to occur in either nitrogen fixation or denitrification ?if climate change altered ocean temperatures and the rates of the two processes, for instance. The new findings show the processes are happening within a few hundred miles of each other...

Climate change could trigger 'boom and bust' population cycles leading to extinction

..." says Wilmers. Understanding how environmental changes influence fluctuations in animal populations is crucial to predicting and mitigating the influence of global climate change. In a paper that appears in the May issue of The American Naturalist, Wilmers describes a powerful new mathematical model that...

Protein overexpression at heart of heart failure

...d channel behavior in human heart failure. Similar changes of both beta-subunit expression and single-channel behavior were also observed in a mouse model of heart failure with cardiac overexpression of the human L-type Ca2+-channel pore. The causal role of the increased beta 2-subunit expression for the “he...

Phthalates now linked to fat, related health risks

...sociated with poor semen quality in men and subtle changes in the reproductive organs in boy babies. This connection between phthalates and testosterone helped to establish a basis for the study, Stahlhut said. Stahlhut’s group hypothesized that phthalates might have a direct link to obesity, since low te...

Scripps research study reveals structural dynamics of single prion molecules

... tagged proteins, which provided information about changes in shape of Sup35 taking place on the nanosecond timescale (billionths of seconds). A third technology, single molecule fluorescence coincidence, was used in an unusual way-to prove that the protein species under scrutiny were not oligomeric (con...

Is there a pilot in the insect?

...altitude ratio, at a constant value. If the insect changes speed, this reflex will make it change altitude so that ratio remains constant. Adjusting the speed/altitude ratio means that the insect has no need to measure either its speed or its altitude. If there is a strong headwind, its forward speed will ...

Canadian study shows bilingualism has protective effect in delaying onset of dementia by four years

...Dr. Fergus Craik, a world authority on age-related changes in memory processes, and neurologist Dr. Morris Freedman, an eminent authority on understanding the mechanisms underlying cognitive impairment due to diseases such as Alzheimer's. "Our study found that speaking two languages throughout one's life ...

Gene that makes people 'early to bed and early to rise' demystified

...ep times. People with the condition generally show changes in core body temperatures and other characteristics governed by the circadian clock that are shifted up by three to four hours. The syndrome is passed on in a dominant fashion, meaning that it takes just one copy of the abnormal gene to exhibit sympt...

World's largest flower evolved from family of much tinier blooms

...volutionary spurt is one of the most dramatic size changes ever reported among eukaryotes; if humans were to undergo comparable evolutionary growth, Davis says, an average man would end up some 146 meters tall, roughly the height of the Great Pyramid of Giza. Because rafflesia lacks the genes most commonly...

Researchers develop technique for bacteria crowd control

...f bacteria. The current produces electrolysis that changes the local pH level in the vicinity of the electrodes. The bacteria, uncomfortable with the changes in pH, swim away from the electrodes and ultimately congregate in the middle of the experimental cel...

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