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Tag: "colored" at biology news

Pistachios lower cholesterol, provide antioxidants

...ually found in leafy green vegetables and brightly colored fruit, according to a team of researchers. "Pistachio amounts of 1.5 ounces and 3 ounces ?one to two handfuls ?reduced risk for cardiovascular disease by significantly reducing LDL cholesterol levels and the higher dose significantly reduced lipopro...

Newborn neurons like to hang with the 'in' crowd

...nvironment—large cages filled with running wheels, colored tunnels and playmates—boost the number of neurons that manage to hook up with the existing network to 80 percent, reinforcing the observation that using one's brain cells is the best way to optimize brain function throughout one's lifetime. ...

Sandia researchers take new approach to studying how cells respond to pathogens

...are tagged with fluorescent molecules, essentially colored dyes. The dyes range from green to red and give researchers the opportunity to track proteins and see, for example, the dynamic cellular production of proteins or protein-binding processes inside or on the surface of the cells. The team is develop...

Fruit flies and global warming -- Some like it hot

... Loeschcke and Hoffmann did field releases with colored flies exposed to different heat hardening treatments to get estimates of a fitness component in the wild. They used the likelihood to be caught at baits in field sites without natural resources as an estimate of fitness in Drosophila. The results sho...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...antation, both mates were individually marked with colored strips and released together. Male and female penguins implanted with the loggers were observed daily in the colony using binoculars, at a distance of at least 10 to 20 meters. Breeding success of the entire colony during 2001 was low at 42 perce...

Researchers make nanosheets that mimic protein formation

...lly nanoparticles." The sheets, which can appear colored under UV illumination from bright green to dark red depending on the nanoparticle size, are made from cadmium telluride crystals, a material used in solar cells. The sheets are about 2 microns in width, about 1/5 the thickness of a human hair. Scie...

Ohio University researchers discover evolutionary oddity in flamingos

...s jaw muscle structure, the researchers injected a colored barium/latex mixture into the blood vessels of a bird that had died and was donated by the Brevard Zoo in Florida. A 3-D view of the bird's head was created using a new computed tomography (CT) scanning technique developed by the Ohio University team...

Zebra finch males prefer females with exaggerated maternal traits

...ferred females with beaks that were more extremely colored than their mothers' beaks. This "peak shift" effect is known from other learning processes in which animals learn to distinguish different stimuli, but the presence of this effect in the imprinting process has not been demonstrated previously. The ou...

Female guppies risk their lives to avoid too much male attention

... looking," says Croft. Male guppies are brightly colored to attract female attention, while female guppies are a dull brown color. The researchers show that female guppies might use this color difference to their advantage, venturing into the deep water where predators lurk. The males' bright coloring also...

Poison dart frog mimics gain when birds learn to stay away

...e way predators learn to avoid the toxic, brightly colored amphibians. In the Mar. 8 issue of Nature, Catherine Darst and Molly Cummings show that a harmless, colorful frog living in the Amazonian rainforest gets protected from predators not by mimicking its most poisonous neighbor, but by looking like a f...

Major WHO study concludes calcium supplements can reduce complications during pregnancy

...cientists depict the protease enzyme in a brightly colored cartoon, with features that resemble a fat cat face. From the front or the back, the identical halves of the enzyme have an ear and cheek protrusion on each side. (See illustration.) Frayed whiskers even appear to sprout from the bottom. The similari...

Computer simulation hints at new HIV drug target

...cientists depict the protease enzyme in a brightly colored cartoon, with features that resemble a fat cat face. From the front or the back, the identical halves of the enzyme have an ear and cheek protrusion on each side. (See illustration.) Frayed whiskers even appear to sprout from the bottom. The similari...

Climate change drives widespread amphibian extinctions

...first recognized. At least 110 species of brightly colored harlequin frogs once lived near streams in the tropics of Central and South America, but about two-thirds vanished in the 1980s and 1990s. In the famed Costa Rican cloud forests, for example, the Monteverde harlequin frog disappeared in the late 198...

Behavioral studies show UV contributes to marsupial color vision

...olor mixture experiments in which choice between a colored light (training wavelength) and an additive mixture of two different colored lights (primary wavelengths) is based exclusively on differences in chromatic content. The results r...

Patterns in genome organization may partially explain how microbial cells work

...is of bacterial genomes yielded "scalograms," maps colored to elucidate the strength of a variety of periodic...The analysis generated diagrams of psychedelically colored islands of statistically significant patterns floating in a sea of insignificant patterns," said Pal...

Engineers discover why toucan beaks are models of lightweight strength

... They use their extremely large and often brightly colored beaks for a variety of purposes, from gathering fruit from the tips of tree branches, to defending themselves. Bird beaks are typically either short and thick or long and thin. The Meyers team decided to prospect for a novel material in toucan beak...

Student scientists create living bacterial photographs

... gene that ultimately controls the production of a colored compound in the bacteria. The Texas students, including Tabor and Aaron Chevalier, realized that after optimizing the pigments and agar growth media, these bacteria could be used to convert light images shined onto the bacteria into biochemical pri...

UF study first to quantify validity of DNA I.D. tool using marine snails

...veness of a DNA identification tool among brightly colored shells. With an error rate as low as 4 percent, two UF scientists have been able to identify cowries collected from around the world by analyzing tissue samples from the marine organisms and comparing them to a comprehensive catalog of species they c...

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

... Medical College of Wisconsin, gave several people colored contacts to wear for four hours a day. While weari... not wearing the contacts, just as people who wear colored sunglasses tend to see colors "correctly" after a few minutes with the sunglasses. The volunteers' n...

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

...fferent colors of quantum dots simultaneously. The colored quantum dots are attached to different "linker" molecules that bind to different RSV surface structures. "It's not much of a jump from two to five," Wright says. Quantum dots are available in a dozen different colors, and antibodies specific to the ...

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