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Tag: "keep" at biology news

A new way of looking at molecular motors

...e body, such as sperm tails or the tiny hairs that keep mucus flowing in the lungs, from moving when they are supposed to. The motors in parasitic organisms contribute to disease by enabling the parasites to break through biological barriers within the human body and actively invade cells. So far, molecu...

Penguins waddle but they don't fall down, UH researchers say

... cumbersome computers built onto their "bodies" to keep them from tipping over when they walk and run. His research can be used to build smaller computers for such robots that will become increasingly more life-like. "There is not much research on this issue, so we're hopeful about the results," Kurz s...

New brain hormone puts brakes on reproduction

...e "reproductive axis" acting via feedback loops to keep the body's hormones within the optimal range for fertility and successful mating. The head of the axis is the brain's GnRH-producing hypothalamus, which communicates via a blood portal with the anterior pituitary and stimulates production of the horm...

Deep-rooted plants have much greater impact on climate than experts thought

... and redistribute water upwards after the rains to keep the top layers moist, thereby accentuating both carbon uptake and localized atmospheric cooling during dry periods. The researchers estimate this effect increases photosynthesis and the evaporation of water from plants, called transpiration, by 40 p...

Researchers unravel DNA tangles and enzyme seamstresses

... cell would be in serious trouble. "One link could keep the cell from dividing. Two links are even more lethal," says Zechiedrich, who notes that "the results of these computer simulations are very striking." While Chan and his collaborators stress their results represent only a quantitative proof of con...

Scientists discover a genetic switch that links animal growth and cancer

...e or injury. Cells possess braking mechanisms that keep them in this quiescent state. When the brakes fail...a tumor suppressor known as PTEN also functions to keep the animal in a waiting state by blocking cell growth when food is absent. If these animals hatch f...

UF researchers develop ways to keep the bloom on the rose

...ds. Using clean, sanitized containers will help to keep all cut flowers fresh longer. Additionally, Nell ... also can be applied to lilies and alstromeria, to keep their leaves green even after they go into a vase. Previously the leaves of these crops were suscept...

Single microRNA causes cancer in transgenic mouse

...e tumor suppressors, because they block genes that keep abnormal cell division in check or induce prolonged survival. Our transgenic mouse model clearly shows that miR155 is an oncogene, because it leads to B cell malignancies when it is dysregulated." Although they now understand that miR 155 overexpre...

Common enzyme is a key player in DNA repair

...olerance mechanism. "It enables the replication to keep going and tolerate the damage, even though it doesn't get rid of it," Walker explained. The molecular building blocks of DNA are adenine, cytosine, guanine, thymine ?A, C, G, and T in the shorthand of molecular biology. In different combinations, ...

Thin tough skin, slow-growing gills protect larval Antarctic fish

...kin and gills to prevent ice from entering, and to keep them from freezing solid." ...

Flu not the only germ threat this time of year

...and washing is the simplest, most effective way to keep from getting sick and making others sick. But it's hard to get people to wash their hands." In the early 1990s Falsey led an experiment involving hand washing among staff members at an adult day care center. She found that respiratory infections wer...

Salmonella caught red-handed

...rtain metabolic pathways are really necessarily to keep Salmonella bacteria alive. Most of these essential enzymes are missing in other important pathogens, or they are also present in the human organism, so they cannot be considered possible points of attack for new broad-spectrum antibiotics with a wide...

Less is more, gene study shows

... too weak." The normal function of CASPASE12 is to keep the response from being too strong, and that probably served humans well at one time. But then, "during human evolution, either because of an environmental change or because of some other genetic changes in the human genome, the balance was broken, s...

Animals can change genes quickly to keep up with viral ingenuity

...a number of different locks and codes that help to keep the viruses out, but viruses are capable of evolvi...genes, evidence of the host's evolutionary race to keep the viruses at bay. In their research, the scientists found evidence that some genes that participa...

Study in Science holds promise for a new approach to drug therapy

...that encourage inflammation. That should in theory keep the white blood cells from mistakenly causing inflammation as they do in patients with rheumatoid arthritis or heart disease. While M119 did block the action of an enzyme involved in inflammation (PI3kinase), it did not block related signals necessar...

Researchers develop portable 'vein finder' for faster, more accurate injections

...ging is that we're using very simple components to keep costs down," notes Francois Guillot, a research engineer in the School of Mechanical Engineering. Unlike large ultrasound systems used by hospitals for general blood-flow studies, the vein finder is targeting a very small area of the body. "That me...

Scientists discover that widely available drug also helps fight kidney disease

...ts with rapamycin. Most kidney transplant patients keep their diseased kidneys in place and the transplanted kidney is an additional, third kidney. So his colleagues, David A. Goldfarb and Andrew Novick, at the Cleveland Clinic in Ohio, suggested studying transplant patients who had received rapamycin to ...

Novel molecular 'signature' marks DNA of embryonic stem cells

...nced. However, the activating influence appears to keep the genes poised for later activity. "For genes, this is equivalent to resting one finger on the trigger," said Stuart Schreiber, an author of the Cell paper, the director of the Chemical Biology program at the Broad Institute, and professor at Harva...

UCI researchers discover key factor for survival of human embryonic stem cells

...of some devastating diseases, but finding a way to keep enough of these cells usable and healthy for trans...w scientists at UC Irvine have discovered a way to keep large quantities of these cells alive, a finding that could potentially lead to mass production of h...

Researchers release new variety of asparagus

...ne through at least a dozen trials, but we need to keep the trials going for a while longer because it may be affected by weather or diseases that only occur occasionally," Roose said. "It will take several years before significant amounts of this new variety appear in the market." Asparagus, a perennial...

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