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Tag: "perform" at biology news

Study provides first look at the 'birth' of a retina cell

...int, cell division stops, and the cell is fated to perform a certain function. "We can now view rod precursor cells at a crucial juncture," says Swaroop. "They are committed to becoming rod cells, but they are still adaptable and have not yet 'become' that type of cell." In mouse models, it takes five to f...

Researchers find protein that silences genes

...s a pathway is set in motion to recruit enzymes to perform DNA methylation. Likewise, changing DNA methylation leads to changes in histone modification". Pikaard's other collaborators, all experts in microscopy, are researchers from the Instituto Superior de Agronomia, Tapada da Ajuda, in Lisbon, Portugal,...

Fly's courtship sheds light on the formation of innate behaviors

...gaster. The male fly, in its attempt to mate, will perform a series of complex behaviours ?including following females, singing, licking, and tapping ?that are not based on the fly's past experience. One gene, fruitless, has been shown to be pivotal to the emergence of these stereotypical behaviours. Fruitle...

'Cellular antennae' on algae give clues to how human cells receive signals

... for a cell's response to external signals. Cilia perform many functions on human cells; they propel egg and sperm cells to make fertilization possible, line the nose to pick up odors, and purify the blood, among other tasks. With such a range of abilities, cilia serve as both motors and "cellular antenna...

African wetland managers armed with new technology

...he training has been really stimulating. I used to perform these tasks manually, which is tedious and cumbersome. I am now anxious to get back to the office and use these products to update my past work. It is marvellous." The seminar also sought to help African users critically assess their requirements, ...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

...because a rope binds them together, allowing it to perform the function of floating, proteins associated with other proteins on a lipid raft may perform functions, Boxer said, though evidence for this is limited. These rafts may serve many functions suc...

New mechanism explains glucose effect on wakefulness

...late the neurons in brain slices from the mice and perform precise biochemical and electrophysiological studies to explore how glucose acted on those neurons. In particular, the researchers performed experiments in which they exposed the neurons to the subtle changes in glucose levels known to occur in daily...

Researchers add to understanding of how brain cells communicate

...ent types of NMDA (N-methyl-d-aspartate) receptors perform varied functions. Their findings are published in the current issue of the Journal of Neuroscience in a paper titled "Permeant Ion Effects on External Mg2+ Block of NR1/2D NMDA Receptors." Communication between cells in the brain depends on special...

Most widely used organic pesticide requires help to kill

...hort, requires the assistance of other microbes to perform its insect-slaying work, a new study has found. ...eria that colonize the insect gut, Bt is unable to perform its lethal work. The startling new insight into the workings of one of the most important and envi...

Honey bee genome holds clues to social behavior

...polate the biology to humans." Adult worker bees perform a number of tasks in the hive when they are young, such as caring for eggs and larvae, and then shift to foraging for nectar and pollen as they age. However, if the hive has a shortage of foragers, some of the young nurse bees will switch jobs and be...

UNC scientists solve mystery of how largest cellular motor protein powers movement

...ic mystery: how the protein dynein fuels itself to perform cellular functions vital to life. These functions ...port cellular structures such as mitochondria that perform specific jobs such as energy generation, protein production and cell maintenance. Dynein also helps ...

On the golf tee or pitcher's mound, brain dooms motion to inconsistency

...hesus macaque monkeys. The monkeys were trained to perform a simple reaching task. When shown a green spot, they were rewarded with juice if they reached slowly to touch the spot. For a red spot, they were trained to reach fast. During the trials the researchers would monitor the activity of individual neuro...

New biochip helps study living cells, may speed drug development

... will be able to measure multiple ions at once and perform even more advanced functions such as electrically stimulating a cell with one electrode while recording the reaction with the remaining three. Because ion channels are a prominent feature of the nervous system and elsewhere, they are a popular tar...

Dragonfly's metabolic disease provides clues about human obesity

...d that the muscles of some dragonflies are able to perform at 80 watts per kg. while others of the same species could perform at up to 220 watts per kg. The life of a dragonfly and successful mating requires intense competiti...

Brains can recover from alcoholic damage but patients should stop drinking as soon as possible

... enables the brain to regain some substance and to perform better. However, our research also provides evidence that the longer you drink excessively, the more you risk losing this capacity for regeneration. Therefore, alcoholics must not put off the time when they decide to seek help and stop drinking; the ...

Advance helps explain stem cell behavior

...need to arrange themselves in distinct patterns to perform life functions. "It's clear that there is an extended sequence of steps which turn some genes on and others off, allowing a cell to become a liver cell, for instance, rather than a brain cell," said Chrissa Kioussi, an OSU assistant professor of ph...

Mirrors in the mind: New studies elucidate how the brain reflects onto itself the actions of others

...lled auditory mirror neurons activate when monkeys perform certain actions and when they hear the same actions being performed. In the new work, the researchers report new evidence for an auditory mirror system existing in humans as well. When subjects were presented with sounds corresponding to mouth acti...

MIT designs portable 'lab on a chip'

... on a chip" fully portable, so the tiny device can perform hundreds of chemical experiments in any setting. "In the same way that miniaturization led to a revolution in computing, the idea is that miniature laboratories of fluid being pumped from one channel to another, with reactions going on here and the...

Experimental cancer drugs counter muscle deterioration seen in muscular dystrophy

..., dystrophic mice receiving treatment were able to perform physical exercise (e.g. running on a treadmill) similar to normal, non-dystrophic mice. Muscular dystrophy is a group of more than 30 genetic diseases, characterized by progressive weakness and deterioration of skeletal muscles. All are inherited,...

Fighting like a girl or boy determined by gene in fruit flies

...ave shown. Females with a male version of the gene perform the male courting ritual with other females. The same gene directs another sex-specific behavior ?fighting patterns, the new study shows. Female fighting, for example, largely involves head butts and some shoving. Males prefer lunges; they rear up...

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