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Tag: "blue" at biology news

Researchers discover way to make cells in the eye sensitive to light

...sive. They found that as well as beingsensitive to blue light, melanopsin uses light at different wavelengthsto regenerate itself. In some forms of hereditary blindnessphotoreceptors are lost entirely, but the retinal ganglion cells, thecells which signal to the brain, remain intact. The researchers belie...

Poplar trees redirect resources in response to simulated attack

... carbohydrate in the untreated plant (red is high; blue is low). Panel B shows that when that same plant is retested after exposure to jasmonic acid, a potent plant hormone that makes the plant 'think' it's under attack, it partitions more of its carbohydrates to the roots for storage. ...

Purdue proves concept of using nano-materials for drug discovery

... tested the devices with an enzyme that produces a blue color when combined with a liquid that contains mo...ed with the enzyme, causing a reaction and turning blue in the process, which demonstrated that the device works. The Center for Membrane Protein Biotechno...

Scientists develop new color-coded test for protein folding

..., turning purple when the pH reached 5.8 and light blue at pH 4, which is close to the acidity of wine. La... caused the solution to quickly change from red to blue as the acidity increased. The researchers were surprised to discover that, when the pH was raised f...

Light therapy may combat fungal infections, new evidence suggests

...required for C. neoformans normal response to both blue and ultraviolet light. Moreover, the researchers found, mice inoculated with C. neoformans lacking either of the light-sensing genes remained healthy 30 days later, while those infected with the normal fungus died by day 30. The finding points to n...

Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine

...ose cells, when exposed to fluorescent light, glow blue instead of green. This technique enabled the team to identify the cell types targeted by the bacteria. Two days after the mice were infected, their spleens were filled with bacteria. Although the overwhelming majority of immune cells in the spleen a...

Chickadees can help humans get their bearings

... concept when a prominent landmark, in this case a blue wall, was present. "Getting oriented is an important part of solving many spatial navigational problems, such as locating your car in the parking lot at the end of a long day in the office. This discovery points to the fact that our early experience...

Genetic links could unlock clues to leading cause of blindness

...versus lifestyle and environmental factors such as blue light, part of the spectrum of natural visible light. Frequent exposure to blue light rays has been linked to macular degeneration. If the disease is going to be treated early, Daw...

Stressed cells spark DNA repair missteps and speed evolution

... in the double strands of DNA that are its genetic blue print. Usually, when this happens, special protein machinery in the cell copies the missing DNA from another chromosome and rejoins the broken ends around the newly synthesized genetic material. "It fixes the hole in the DNA by copying similar info...

Scientists get first glimpse at how plants, most animals repair UV-damaged DNA

...UV-damaged DNA, and hit the mixture with a kind of blue strobe light to simulate the energy that it would receive from visible light. Because the light pulses lasted less than a trillionth of a second, the researchers were able to make a very fast series of measurements to follow how the chemical reactio...

Female butterflies go for sparkle -- not size -- when choosing to mate

... reflective patterns on their wings in the form of blue or violet bands of coloration. "Our assumption is that they are there for sexual selection purposes as well," she said, "but we still don't know what causes the change from a female's preference for relatively small pupils in this species to the lik...

Method slashes quantum dot costs by 80 percent

...epending on the size, shifting from the red to the blue end of the spectrum as the crystals get smaller. The reproducible synthesis of high-quality quantum dots became a reality in the early 1990s when researchers at MIT pioneered a new method of producing quantum dots with uniform sizes and well-define...

The right drug at the right time

...epending on the size, shifting from the red to the blue end of the spectrum as the crystals get smaller. The reproducible synthesis of high-quality quantum dots became a reality in the early 1990s when researchers at MIT pioneered a new method of producing quantum dots with uniform sizes and well-define...

Sudden change in social status triggers genetic response in male fish, study finds

...s. His body color changes from dull gray to flashy blue or yellow, and a prominent black stripe ("eyebar") appears across his face. This physical transformation signals to males and females alike that he's the top fish now and will vigorously defend his newly acquired breeding grounds. "We found that wh...

Algal protein in worm neurons allows remote control of behavior by light

...oral responses by simply illuminating animals with blue light. The work paves the way for better understanding of how neurons communicate with each other, and with muscles, to regulate behavior in intact, living organisms. Generally speaking, detailed information about the activity and function of specifi...

Expert dispels bird flu paranoia

...acial and comb swelling and mouth and comb turning blue and report any worries to your local government biosecurity officer. Don't eat raw or undercooked chicken. Don't use untreated water, use clean town water or bore water. "Consumers of poultry meat and egg products should not be concerned as t...

Genetic key to growth of new arteries is identified

...ragments of the MMP2 gene coupled to the so-called blue gene. Leg muscles turned blue only in the strain of mice with the specific gene fragment that turns on in response to arterial blo...

Plants give pests sock in the gut

...rchers tested the permeability of the matrix using blue dextran, a fermented sugar solution commonly used as a molecular size marker. Results showed that Mir1-CP created holes in the matrix. To replicate the test in vivo, the researchers fed caterpillars with plants susceptible to the insects and those ...

Sea coral's trick helps scientists tag proteins

...e tags are zapped with an intense pulse of visible blue light. The dramatic color change "makes it possib...escent markers, Dendra can be activated by visible blue light, which is less harmful to living cells and does not require special laser equipment, Konstanti...

Lizard 'third eye' sheds light on evolution of color vision

...parietal, eye, distinguishes two different colors, blue and green, possibly to tell the time of day. Speci... eye photoreceptors contain two pigments per cell, blue and green. Having two different pigments allows the cell to respond to two different colors of light...

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