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Tag: "color" at biology news

Timing is everything: First step in protein building revealed

...scent chemicals subtly interact, which changes the color orwavelength of light that is given off. If the di...ance between thefluorescent molecules changes, the color of the emitted light changesas well.The researchers successfully used this phenomenon, known asfluor...

Color-blind method opens new doors in DNA sequencing

...d. A common problem with the technique is that the color of light emitted by the dyes is similar. Even with complex computer programs to assist in deciphering the signals, this "cross-talk" between the dyes results in subtle variations that can cause nucleotides to be miscalled. The new method developed a...

Purdue proves concept of using nano-materials for drug discovery

...ed the devices with an enzyme that produces a blue color when combined with a liquid that contains molecules small enough to easily pass through the pores. The enzyme, which is a protein, was placed inside the vessels - on the inner surface of the alumina membranes - and the liquid was placed outside each ...

Scientists discover the cellular roots of graying hair

...kin cancer. Thescientists traced the loss of hair color to the gradual dying off ofadult stem cells that f...ines withhair-making cells called keratinocytes to color the hair, arespecialized cells spawned by colorless melanocyte stem cells. Thesecells were discovere...

Fundamental Finding Yields Insight into Stem Cells, Cancer; Opens Door to Drug Discovery

...kin cancer. Thescientists traced the loss of hair color to the gradual dying off ofadult stem cells that f...ines withhair-making cells called keratinocytes to color the hair, arespecialized cells spawned by colorless melanocyte stem cells. Thesecells were discovere...

Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.

...kin cancer. Thescientists traced the loss of hair color to the gradual dying off ofadult stem cells that f...ines withhair-making cells called keratinocytes to color the hair, arespecialized cells spawned by colorless melanocyte stem cells. Thesecells were discovere...

ASU researchers finds novel chemistry at work to provide parrot's vibrant red colors

...d defies previous assumptions and explanations for color variations in parrots, said Kevin McGraw, an assis...w. "This research is exposing a whole new world of color communication in parrots and the potential physiological and biochemical roles of the new molecules ...

Transport System Smuggles Medicines Into Brain

...d defies previous assumptions and explanations for color variations in parrots, said Kevin McGraw, an assis...w. "This research is exposing a whole new world of color communication in parrots and the potential physiological and biochemical roles of the new molecules ...

Scientists develop new color-coded test for protein folding

...ave developed a simple test that instantly changes color when a protein molecule attached to a gold nanoparticle folds or unfolds. The new technique, which works on the same principle as ordinary pH tests that measure the acidity of water, is described in the March 2005 issue of the journal Chemistry and B...

New insight into people who 'see' colors in letters and numbers

...he synesthetes really were seeing the colors, that color perception would help them distinguish shapes such...experiment, the researchers found that synesthetic color helped the synesthetes pick out specific numbers or letters in a crowded display. The researchers f...

Ophthalmologists Use Artificial Silicon Retina Microchip To Treat Vision Loss

...cluded the ability to read letters, improvement in color vision, and expansion of their visual field. Some patients gained new ability to recognize facial features -- something that they were unable to do before ASR chip implantation. Some patients have experienced improvement in activities of daily living...

Ophthalmologists implant five patients with artificial silicon retina microchip

...cluded the ability to read letters, improvement in color vision, and expansion of their visual field. Some patients gained new ability to recognize facial features -- something that they were unable to do before ASR chip implantation. Some patients have experienced improvement in activities of daily living...

Chemicals in tattoo inks need closer scrutiny

...U.S. Food and Drug Administration as cosmetics and color additives, the agency has not traditionally regula...erent brands of black ink as it is the most common color used in tattoos," Finley-Jones says. The researchers also are testing three different brands of red,...

Revolutionary nanotechnology illuminates brain cells at work

...this activity under the microscope by watching the color change. We stimulated the neurons and watched them secrete glutamate in response. We also saw the removal of the glutamate as the neurons returned to normal ready to fire again." "This is a tremendously exciting technology," remarked Wolf Frommer, l...

NASA study finds snow melt causes large ocean plant blooms

...nd colleagues used satellite observations of ocean color to show phytoplankton concentrations in the Western Arabian Sea have increased by more than 350 percent over the past seven years. The study is in this week's SCIENCE magazine When winter and spring snow cover is low over Eurasia, the amount of sola...

Bioelectronic ‘signatures?hold key to DNA mutations

...rily cause a mutation or determine our eye or hair color ?but, on average, SNPs occur about once in every 1,000 DNA bases, adding up to 3 million potential individual differences across the human genome. Wang’s method allows for an accurate, ultra-sensitive, rapid and low-cost identification of these SNP v...

Bee mites suppress bee immunity, open door for viruses and bacteria

...es are about the size of a pin head, dark brown in color and visible on close inspection. This bee mite probably arose in the Eastern or Chinese Honey Bee population and hopped over to the United States in 1987. They quickly infested western or European honey bees. One sign of infection is the presence of...

Bees, Brains and Addiction

...f bees. Bees learn to land on a tile of a certain color after they are rewarded just once with sugar water for landing on that color. A single nerve cell in a bee's brain, Sejnowski explains, is responsible for deciding if the information coming from the senses predicts the sugar reward and signaling to t...

New tool reveals secrets of migrating cells

...e glow and the cells light up. A certain energy or color of laser light is needed to make the dye, in this case green fluorescent protein, glow. But high-frequency, short-wavelength visible light, like green, doesn't penetrate tissue as deeply as longer, redder wavelengths. The idea behind two-photon imag...

Microscopic brain imaging in the palm of your hand

...ssue fluoresces, or radiates, light of a different color in response. However, a problem with one-photon fluorescence is that the deep tissue causes the photons to ricochet, or scatter, as they return to the detector. The result is a background haze in the images, almost like viewing the sample through a ...

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