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Tag: "size" at biology news

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...Kingsley said. For example, "sticklebacks vary in size and color, reproductive behavior, in skeletal morphology, in jaws and teeth, in the ability to tolerate salt and different temperatures at different latitudes," he said. Kingsley, Schluter and their co-workers picked one trait -- the fish's armor pl...

Development of portable infectious disease detector

...csystem and shrank it down into a device about the size of a coffee cup.One of the cost-saving aspects of the design was to keep thefluid-handling components separate from the microelectronics. Theresulting device is considerably larger than comparable lab-on-a-chipsystems but it is also much less expensi...

First real-time view of developing neurons reveals surprises, say Stanford researchers

...Niell set up a tiny LCD screen showing squares the size of the fish's favorite planktonic food moving up and down or left and right. They expected to find that young neurons fire in response to a variety of different images, then refine their role over time so that in the adult fish the neurons only resp...

Novel ultrafast laser detection of cancer cells also may improve understanding of stem cells

... Fortunately, the mitochondrion is nearly the same size as the light wavelength of about 800 nanometers, a...ly sensitive to subtle changes in the mitochondria size and effects of clustering. To date, the research team has found that 90 to 95 percent of light scatt...

Simple drug has the potential to save many lives threatened by malaria

...panying editorial. Although a single trial of this size cannot alone be the basis for policy change, rectal artemisinins might be one safe and effective way to reduce the risk of children dying before reaching hospital. Providing effective antimalarial treatment close to home to reduce delay has the pote...

Tiny scaffolding allows stem cells to become working fat cells

...ogether in normal tissue. The fibers are about the size of a collagen fiber, several nanometers (a billionth of a meter) across, and provide tensile strength to support the growing tissue," Kniss said. The researchers then "seeded" that scaffolding with cells called pre-adipocytes cells that had begun th...

Devising Nano Vision for an Optical Microscope

...remely sensitive to small changes in the shape and size of the scattering feature,?explains Rick Silver, a physicist in NIST’s Precision Engineering Division. ...

Breakthrough method in nanoparticle synthesis paves the way for new pharmaceutical and biomedical applications

...loped a novel method to simultaneously control the size and morphology of nanoparticles, which can be used...lored simultaneously with nanometer-scale particle size and nanometer-sized pores. This is a beautiful example of ‘bottom-up?nanotechnology made possible by...

X-Ray Beams And Fruit Fly 'Flight Simulator' Aid Scientists' View Of Muscle Power

...w we have taken advantage of the fruit fly’s small size and shone light right through the whole animal, illuminating the working muscles during flight and probing the molecular motions deep within the muscle cells.?/p> These experiments uncovered previously unsuspected interactions of various proteins...

World's largest rainforest drying experiment completes first phase

...iod of rainfall exclusion, as the trees of similar size continued to grow in the "control" forest plot. The trees slow down the amount of water that they lose from their leaves by closing their stomates. The trees adjust to the resulting reduction in photosynthesis by diverting less of the sugar and other...

Use of Insecticides Linked to Lasting Neurological Problems for Farmers

...hip between exposure and health effects. The large size of this study gives it great statistical power," said Dr. Kamel. The AHS (http://www.aghealth.org/) is designed to investigate the effects of environmental, occupational, dietary, and genetic factors on the health of the agricultural population. The...

Vampire bats keep out of trouble by running

...an athletes such as the agouti, a rodent about the size of a hare, which might wake up and take a swipe at the nocturnal visitor. It remains unclear exactly what the native prey were before the introduction of cattle, he adds. The Cornell zoologists plan to go a step further and compare the vampire bat t...

Camera Traps Catch Eye of the Tiger

...d tracking tigers in order to better establish the size and shape of their range in certain habitats. WWF has been able to focus on tiger research thanks to the forest protection established by Indonesia's recent creation of the 212-square-mile Tesso Nilo National Park. ...

Not-for-profit publishers call NIH public access rule a missed opportunity

...fic literature while at the same time reducing the size and therefore the cost to NIH of expanding PubMed Central," Hubel added. "Linking to journal sites is seamless and virtually invisible to those who use NIH's MEDLINE website to search for health information," noted James M. George, MD, president of ...

Great White shark evolution debate involves WSU Lake Campus geology professor

...lio said the Great White sharks, which can reach a size of nearly 25 feet and possess two-inch teeth, have been a major research subject of his for the past four years. He holds a doctorate from Duke in paleontology, the study of prehistoric life forms. His academic background also includes master's degre...

Flocking together: Study shows how animal groups find their way

... in leading a large group as a small one. When the size of the group increased from 10 to 200, the percent...ger subgroup even if the two subgroups differed in size by only one member, demonstrating that groups can come to an accurate consensus decision even though...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...industry and the federal government understand the size of salmon runs, early UW program leaders also collected basic information about weather, lake levels, emerging insects, zooplankton levels and other fish species and juvenile salmon growth, which distinguishes the data set from other salmon monitorin...

Biodiversity hotspots identify conservation priorities

...cent of the Earth's surface, an area equivalent in size to Russia and Australia combined. The new analysis...nt Marc Ravalomanana's recent pledge to triple the size of his nation's protected area network. "The new hotspots analysis ensures that we will continue to...

Alzheimer's cognitive decline slowed

...keys restored atrophied brain cells to near-normal size and quantity, and also restored axons connecting the brain cells, essential for communication between cells. The recent human studies were a Phase I clinical trial, designed to test safety and toxicity. The procedure was initially performed while pat...

Researchers make gains in understanding antibiotic resistance

... data indicate that the L22 mutation increases the size of a "tunnel" in the ribosome, through which the growing peptide chain moves during synthesis. This tunnel is normally blocked by macrolide antibiotics. In the mutant form, the tunnel widens, which may explain why macrolide antibiotics are no longer ...

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