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Tag: "minutes" at biology news

Mechanism for the captation of nutrients in plants- unknown to date

... "endocitosis" and which required approximately 90 minutes from the time the cell started to capture saccharose in order to start functioning. That is, for these first 90 minutes, the saccharose penetrates using the transporter mechanism while, parallely, the endocitosis phenomenon is activated to form micro...

Aptamer-based Biosensor screens Air Force personnel and equipment

Air Force personnel will soon know within minutes if they or their equipment are contaminated with a biological agent, thanks to a new technology developed by the Air Force and a national laboratory. Personnel will use the biosensor system to collect and isolate samples, detect and identify agents,...

Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals

...im turquoise light, similar to that found about 33 minutes after sunset, the birds show normal migratory orientation, with the seasonal shift between southerly directions in autumn and northerly directions in spring. Tests under specific magnetic conditions clearly showed that this orientation involved the i...

For first time, brain cells generated in a dish

...ocess, they snapped images of the cells every five minutes for up to 30 hours and compiled the images into movies. Traditional ways to attempt neurogenesis have been unable to so closely duplicate the natural process. They also haven't allowed scientists to monitor the entire sequence of cell development fro...

Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

...tal muscle," in this case totaling as little as 15 minutes over 2 weeks. The McMaster group "employed 'sprin...ving 30-second sprints performed 'all out,' with 4 minutes of recovery," Coyle summarized. "Recreationally active college students performed only 2-4 minutes ...

Penguin chicks exposed to human visitors experience spike in stress hormone

...terone. The first sample was obtained within three minutes of capture to establish a baseline because, unlike a hormone such as adrenaline, it takes several minutes for corticosterone to build up in the bloodstream after a stressful event, such as being captured. A...

New technique rapidly detects illness-causing bacteria

...e test tube is placed in a water bath for about 25 minutes at exactly 41 degrees Celsius (106 Fahrenheit). At that temperature, the complementary probe DNA sequence binds to the target RNA sequences. In a positive result, the capture probe attached to the rRNA target molecule anchors itself to a strip on a ...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

...cent protein is that the protein "bleaches out" in minutes while quantum dots maintain their brightness for hours. The image on the right shows a culture labeled with green fluorescent protein while the image on the left shows a culture labeled with red quantum dots. Click on the start button to see how much...

Proposal would allow wild animals to roam North America

...roam parts of North America. "If we only have 10 minutes to present this idea, people think we're nuts," said Harry Greene, professor of ecology and evolutionary biology at Cornell. "But if people hear the one-hour version, they realize they haven't thought about this as much as we have. Right now, we are ...

Why do aneurysms form? New studies suggest leading role for white blood cells

...eurysms have already burst and who will die within minutes or hours if the bleeding isn't stopped. AAAs can go undetected for years; experts sometimes refer to them as a "ticking time bomb" inside a patient's abdomen. In fact, an estimated 10 percent of all men over the age of 70 may have intact aortic aneu...

Several minute intermediate stage in virus-cell fusion discovered; opportunity for drug development

...way; instead, a small pore can persist for several minutes before adopting its final size, or (in rare cases) closing permanently. This 'intermediate stage,' as the scientists describe this time interval, was not known to exist for virus-cell fusion events. The net effect is that the invading virus is held ...

Use of high hydrostatic pressure to inactivate Hepatitis A virus in oysters studied

...nd may remain viable in shellfish after up to five minutes of steaming. For these reasons, high hydrostatic pressure treatment of raw oysters is especially appealing to oyster processors and distributors, as well as public health officials. HPP makes it possible to eradicate or inactivate pathogens while st...

'Underground' tunnels discovered as means for communication between immune system cells

...ments into a culture dish, and, indeed, one to two minutes before the appearance of the thin membranes, there were bursts of color indicative of calcium flux. Given their earlier results, the researchers anticipated that by repeating the experiment with macrophages there'd be no response. But as luck would h...

Mosquito study shows new, faster way West Nile can spread

...oes, which fed on the mouse through the mesh. Five minutes later, they moved a second mesh-topped container in position so that its uninfected "recipient" mosquitoes could feed on the same mouse, allowing the simultaneous feeding by infected and uninfected mosquitoes to continue for an hour. In repeated expe...

Water management in cells

...that the efflux of organics only starts one or two minutes later. This efflux only takes place if there is a large difference between the intracellular and extracellular salt concentrations. From this the researcher concluded that the efflux of organics is a second line of defence, which is only activated if...

Lactose intolerance linked to ancestral environment

...ps, bloating, gas and diarrhea that begin about 30 minutes to two hours after eating or drinking foods containing the milk sugar lactose. The use of lactase enzyme tablets or drops or lactose-reduced milk and similar products can help the lactose intolerant digest dairy products. Sherman's study concludes t...

Women feel more pain than men, research shows

... a warm water bath (37 degrees centigrade) for two minutes before transferring the hand into an ice water bat...longer stand the pain). An upper time limit of two minutes is used in these kinds of studies. Other research by the Pain Management Unit has looked at the rel...

Vaginal gel may provide a new approach to HIV prevention

... experimental gels in the animals' vaginas. Thirty minutes later, the animals were exposed to high-dose SHIV. The three inhibitors were each effective when used alone and also when tested in combination. Of 20 monkeys given the BMS and Merck microbicides in combination, 16 were protected from infection. Al...

Does manganese inhaled from the shower represent a public health threat?

...t of manganese people would absorb by showering 10 minutes a day. Because manganese is monitored in public water supplies, high levels of this naturally occurring metal are especially found in wells and private water supplies. Spangler and Robert Elsner, Ph.D., published their findings in the current issue...

Color perception is not in the eye of the beholder: It's in the brain

...glasses tend to see colors "correctly" after a few minutes with the sunglasses. The volunteers' normal color vision, however, began to shift after several weeks of contact use. Even when not wearing the contacts, they all began to select a pure yellow that was a different wavelength than they had before wear...

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