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Tag: "light" at biology news

New study aims to stop sepsis in its tracks

...in patients. This molecular approach may also shed light on new ways to understand and treat sepsis. And consortium researchers will study the cost-effectiveness and logistics of establishing such protocols in emergency departments around the country. The scientists aim to develop a blueprint, complete w...

Novel experiment documents evolution of genome in near-real time

...e replacing the wiring system in a building when a light bulb burns out. But we repeated the experiment more than 50 times and mutations in the RNA polymerase gene appeared again and again." The researchers report that mutations in both genes appeared together in several cases after six to eight days in...

With fruit fly sex, researchers find mind-body connection

...thousands of genes in common, the work can shine a light on the biological roots of human behavior. For example, McKeown recently helped discover a genetic mutation that causes flies to develop symptoms similar to Alzheimer's disease ?a gene very similar to one found in humans. Some of McKeown's recent ...

Why do cold animals make bigger babies?

... at the same time, an approach they hope will shed light on many evolutionary problems. They used data from many populations of Eastern Fence Lizards (Sceloporus undulatus), which revealed that the lizards in colder environments produce larger offspring than lizards in warmer environments. So why do ani...

Chronic jet-lag conditions hasten death in aged mice

...tered) rats exposed to a six-hour advance in their light cycle died after the shift in schedule. In the ...t regimen. Past work has also linked changes in light schedule with death in other animals and under different experimental circumstances, but the finding...

Theory of oscillations may explain biological mysteries

...etween oscillating biological populations may shed light on some of the toughest questions in ecology, including the number and types of species in an ecosystem, according to an article in the December 2006 issue of BioScience. The article, by John Vandermeer of the University of Michigan, shows how extens...

Genetically engineered blood protein can be used to split water into oxygen and hydrogen

...s proven to be sensitive to light, and can capture light energy in a way that allows water molecules to be split into molecules of hydrogen and oxygen. Dr Stephen Curry, a structural biologist from Imperial College London's Division of Cell and Molecular Biology who participated in the research explains:...

German researchers develop first non-invasive test to measure skin aging

...he ability of ultra-brief pulses of laser infrared light to stimulate tissues to emit light at shorter wavelengths -- blue in the case of collagen, and green in the case of elastin. Since the...

Gold nanoparticles prove to be hot stuff

...wever, the scientists also found that gold absorbs light and heats up quickly, by a remarkable 266 degrees (Celsius) per watt of laser power, at the wavelength most often used in optical traps. Unless very low laser power is used, the heat could damage the molecules under study. Thus, gold beads would not ...

Compound eyes, evolutionary ties

...orescent protein) allows the formation of distinct light gathering units in each of its 800 unit eyes, an e...rt that one of three proteins needed to form these light gathering units is present in the visual system of fruit flies, house flies and other insects with o...

Weighty viruses

... particles are ready for mass determination. Laser light is beamed into the ion trap. If a particle is present, it scatters the light. The scattered light can be detected through the transparent surfaces of the ion trap. A portion of the light is sent to ...

Transplanted photoreceptor precursor cells restore visual function in mice with retinal degeneration

... observed improvements including pupil response to light and response to light stimuli from ganglion cells, which form the circuitry to the brain. Swaroop explains that photor...

How the brain weaves a memory

...eriments with human volunteers that shed important light on this process. In their experiments, the researchers presented the subjects with series of "study" words on a display screen, as their brains were scanned using functional magnetic resonance imaging (fMRI). This technique involves using harmless ...

'Empty nester' parent birds use recruitment calls to extend offspring care

...nset of nutritional independence, and it sheds new light on the sophistication of parental care among birds. ...

Heavy smoking cuts women's chance of pregnancy -- even with donated oocytes

...is means we have confirmed previous data that show light smoking has no significant impact on IVF cycles, either through affecting the ooctye or the uterus. But, heavy smokers have a much lower chance of achieving pregnancy. The fact that we see this result in a situation in which the oocytes were donated ...

Fantastic Voyage: A new nanoscale view of the biological world

...s ?in the way lenses and prisms manipulate visible light - to create an atomic mass image of the sample. Lechene et al. developed MIMS by combining the use of a novel secondary-ion mass spectrometer developed by Georges Slodzian, from the Université Paris-Sud in France, labeling with stable isotopes and bu...

Learning during sleep?

...r Medical Research in Heidelberg have now shed new light on the mechanisms that create memory. According to their findings, the areas of the brain work together, but possibly in a different way from that previously assumed. "This is a technically sophisticated study which could have considerable influence ...

Brown scientists map structure of DNA-doctoring protein complex

...hrough with light. Sun measured the wavelengths of light as they bounced between the molecules of dye. Those measurements were then fed into a special software program created by Dale Mierke, a Brown professor of medical science, which plotted their positions to create the structural map. "The real brea...

Rearing an army to save wheat

...After two years, the research shows that the added light consistently causes small increases in the number of parasitic wasps, while the food supply is probably not important in these mass-rearing cages, because the parasitoids were added in large numbers, and attacked the available sawflies before the nee...

Train your brain to hear your friends at a party

... loss. Irving said: "When we switch on a bright light our eyes detect the increase in light levels and the brain sends a message to the eye to tell it to contract the pupil and let in less lig...

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