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Tag: "turned" at biology news

Some good news for the world's poor

... saved thousands of hectares of forests from being turned into farmland, and reduced the number of malnourished children. The research, led by respected American economist Dr. Robert Evenson from Yale University, was the first major attempt to assess the economic impact of improved crop varieties, not just...

The bioweapon is in the post

...manages Picoscript in Houston, Texas, says that he turned down one orderplaced by an individual at a US biotech firm, after Picoscript's enquiries revealed the gene was being ordered on behalf of a friend in another country. Experts are concerned that the checks currently employed by some companies aren't ...

A resetting signal keeps circadian rhythm on track in Drosophila fruit flies

..., we introduced phase differences between them. It turned out that no matter the manipulation, the morning cells set the pace of the entire system, so that the rhythm always stayed on track." The study showed that the morning clock resets the evening clock every day, without changing the intrinsic speed of...

OHSU discovery sheds light into how stem cells become brain cells

...re and then removed Brg1, the cells in the culture turned into neurons but failed to differentiate into glia. "This research shows us that in mice, Brg-1 is a critical signal that prevents stem cells from turning into neurons at the wrong time. However, since we can manipulate Brg1 expression in stem cel...

Odd energy mechanism in bacteria analyzed

...y producing mechanism benefits the cell. "When we turned the lights off, there was no mechanism for the proteorhodopsin gene to produce energy, but that didn't seem to make any difference in the growth rate of SAR11," Giovannoni said. "So we know that under normal conditions this alternate form of energy p...

The secret love life of plants

...e conditions, fertilisation is possible at all. It turned out that the mutated pollen can survive and even grow into a female partner. Once it has arrived there, the single sperm cell of the cdc2 pollen merges only with the egg cell and not with the central cell. This shows a hierarchy, never before discove...

Picking particles faster than one at a time

... selected particles, well over 80 percent of which turned out to be the same as those picked by the program....didates were inspected more closely, however, many turned out to be true positives of good quality; only about 10 percent of the program's picks were false po...

MicroRNA may have fail-safe role in limb development

...ing off gene activity, but by making sure it stays turned off. More specifically, researchers report linking a specific microRNA - miR 196 - to limb development, a finding that may be useful in understanding birth defects. Until about five years ago, genetic researchers focused on DNA, which contains all...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

... more ash and inundated by lake waters, eventually turned to rock. But Paul Renne, director of the Berkeley Geochronology Center and an adjunct professor of earth and planetary science at UC Berkeley, and his colleagues in Mexico and at Texas A&M University report in the Dec. 1 issue of Nature a new ag...

Genetic key to growth of new arteries is identified

...ne coupled to the so-called blue gene. Leg muscles turned blue only in the strain of mice with the specific gene fragment that turns on in response to arterial blockage. In this way, the researchers identified and described previously unknown areas of the MMP2 gene, plus other molecules that activate thos...

Depression model leaves mice with molecular scar

...his animal model of depression, silencer molecules turned off a gene for a key protein in the brain's hippoc...ne and overcome the silencer molecules. Imipramine turned off an enzyme (Hdac5) that degrades the activators, allowing them to accumulate. "The molecular sc...

Swiss researchers develop all-in-one remote control gene expression tool

...ton's diseases. The expression of the gene can be turned on and off by feeding the animal an antibiotic. Li...us the expression of this growth factor can now be turned off when the desired effect is achieved, thus preventing unharnessed growth ?otherwise known as canc...

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

...r, the research team found that the NOS1AP gene is turned on in the left ventricle of the human heart. And the "lub" part of the "lub-dub" heartbeat corresponds to ventricular contraction. So NOS1AP is active in the right place and time to play a role in QT interval. Further studies revealed that approxim...

Liver cancer linked to cellular repair pathway

...g goes wrong in these cells and the pathway is not turned off. That's what conveys malignancy," Sicklick said. Study co-authors include Yin-Xiong Li, Yi Qi, Kouros Owzar and Wei Chen of Duke University Medical Center; Aruna Jayaraman, Rajesh Kannangai, Perumal Vivekanandan and Michael Torbenson of the John...

Immune response to HIV in the brain

...mmune/viral aspect of HIV, in many ways [AIDS] has turned into a chronic disease," says Fox. "The fact that many of the antiretroviral drugs do not show good penetration of the blood-brain barrier further puts the brain at risk, since the brain is infected soon after HIV exposure and infection." While prev...

Experimental vaccine protects nonhuman primates when given after exposure to Marburg virus

...mmune/viral aspect of HIV, in many ways [AIDS] has turned into a chronic disease," says Fox. "The fact that many of the antiretroviral drugs do not show good penetration of the blood-brain barrier further puts the brain at risk, since the brain is infected soon after HIV exposure and infection." While prev...

UC Berkeley researchers create a biologically-inspired artificial compound eye

... long enough to slightly harden the material, then turned out the contents: little resin hemispheres with a surface packed with 8,700 raised mounds. When struck by a beam of light, each of these mounds acts as a lens, focusing the light and sending it into the material below. Like a welder's torch burning a...

Low-cost drug gaining favor for use in HIV-infected children in poor countries

... be a randomized clinical trial. Grimwade's search turned up only one trial that passed that litmus test: a study of 534 HIV-positive children in Zambia. The study found 33 percent fewer deaths in the group of children who received cotrimoxazole versus the children who were not treated with the antibiotic....

Antioxidant selenium offers no heart-disease protection

... heart disease based on observational studies have turned out not to be protective in randomized clinical trials, and selenium now has joined this group. The main findings of this report focus on the 1,004 participants in the study, conducted from 1983-96, who were free of cardiovascular disease when they...

For one Stanford doctor, the beat goes on during open-heart surgery

...e doctors and nurses and technologists in the room turned suddenly quiet. The beat, beat, beat of the heart monitor filled the air. Ihnken, head tilted, found the spot he was searching for on the heart's backside and, finally, looked up. "Everything OK out there?" Ihnken asked the anesthesiologist breaking...

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