light 2 4

Tag: "light" at biology news

New study sheds light on 'dark states' in DNA

...n bombarded by UV light. Scientists know that UV light can cause genetic alterations that prevent DNA fro..., which is based on the idea that molecules absorb light at specific wavelengths, and allows them to study events happening in less than a picosecond. They...

MU researcher placing eye implants in cats to help humans see

...es several thousand microphotodiodes that react to light and produce small electrical impulses in parts of the retina. "We are really excited about the potential uses for this technology and the potential to create improved vision in some of the millions of people affected worldwide with retinal blindne...

Keeping the body in sync -- The stability of cellular clocks

...roximately one day, even in conditions of constant light or darkness. Peripheral organs in the body have th...oscillator-related genes. The current results shed light on how a genetically-linked phosphorylation event gone wrong could lead to inaccurate timing of our ...

Tracing broken wiring in stroke patients

...rain. The researchers said their findings shed new light on the neurological details of this "spatial neglect." Their findings also demonstrate the value of the magnetic resonance imaging (MRI) technique for studying how disruption in brain circuitry produces behavioral symptoms. Maurizio Corbetta and col...

Scientists discover new life forms in the Arctic Ocean

...eins, highly fluorescent substances that transform light into biomass, and phyte meaning they are plants. The discovery came from carefully analyzing DNA sequences belonging to vast communities of micro-organisms living in the ocean. "There was one group of sequences that just didn't line up with any of...

Scripps research team discovers a chemical pathway that causes mice to overeat and gain weight

...hout the EP3 receptors were more active during the light hours-the nocturnal mice's "night"-and, more importantly, were eating during this time. The increased activity led to higher body temperatures, but this did not burn enough extra calories to balance the additional eating, so the mice weighed 15 to 30...

Bioluminescence at the service of a novel cerebral imaging technique

...sence of its co-factor , coelenterazine, will emit light (a photon) when there is a change to the calcium concentration in a cell; for example, following neuronal activation. This makes it possible to follow neuronal activity in neurons, or even to trace it in a network of neurons. Furthermore, this litt...

Racing neurons control whether we stop or go

In the children’s game "red light green light," winners are able to stop, and take off running again, more quickly than their comrades. New research reveals that a similar race goes on in our brains, with impulse control being the big winner. "The research provides new insights into...

Erectile dysfunction in diabetes is due to selective defect in the brain

A new study sheds additional light on how erectile dysfunction (ED) interacts with diabetes. The study is another step in uncovering the link between the two disorders, and may lead to improved efficacy in treatments. The study, "Lack of Central Nitric Oxide Triggers Erectile Dysfun...

Global 'sunscreen' has likely thinned, report NASA scientists

...etween 1986 and 1991. The NASA study also sheds light on the puzzling observations by other scientists that the amount of sunlight reaching Earth's surface, which had been steadily declining in recent decades, suddenly started to rebound around 1990. This switch from a "global dimming" trend to a "brigh...

Scientists to track impact of Asian dust and pollution on clouds, weather, climate change

Mice whose brain cells respond to a flash of light are providing insight into the complexities of the...ent in green algae that "turns on" when exposed to light and enables the algae to swim toward the light. When the researchers shined light on the areas of...

Common algae helps illustrate mammalian brain electrical circuitry

Mice whose brain cells respond to a flash of light are providing insight into the complexities of the...ent in green algae that "turns on" when exposed to light and enables the algae to swim toward the light. When the researchers shined light on the areas of...

Scientists map key landmarks in human genome

...iseases, the scientists say. Moreover, it may shed light on the role of nucleosomes in the process of "reprogramming" an adult cell to its original embryonic state, which is a critical operation in cloning. David E. Fisher, MD, PhD, and his Dana-Farber colleagues describe their findings in Nature Biotechn...

Freeze! Scientists film proteins at work by freezing them at different states

...ay were restricted to proteins that get excited by light and are in very resistant crystals....

Studies yield insight into the numerical brain

... Neuron, published by Cell Press, shed significant light on how the brain processes numerical information--...colleagues also concluded that their findings shed light on how the brain learns to associate symbols with numbers. "Our results show that, at least in the...

The connector rotation hypothesis? Phage do not pack their DNA by rotation

...ned, the researchers shone homogeneously polarized light on them and recorded the pattern of fluorescence produced in two channels at right angles to one other. If the connectors had been rotating, they would have seen a sine wave-like fluctuation in intensity in both channels with a phase shift of 90 d...

Making mice with enhanced color vision

...ues have found that mice simply expressing a human light receptor in addition to their own can acquire new ...d a classic preference test; mice set before three light panels were trained to touch the one panel that appeared to differ from the other two. A correct an...

Stretching DNA to the limit

It has long been known that UV light can damage DNA, reducing its ability to replicate ... width with increasing exposure to UV light. UV light induces the crosslinking of the constituent DNA bases within the polynucleotide chains, as well as c...

Tears reveal some of their deepest secrets to researchers

...d a mystery to scientists. A new study sheds some light on the complex design of tears. What we think of as tears, scientists call tear film, which is made up of three distinct, microscopic layers. The middle, watery layer ?what we normally think of as tears when we cry ?is sandwiched between a layer of m...

Microfluidic chip helps solve cellular mating puzzle

...Online Publication of the journal Nature, shed new light on the way cells send and receive signals from one another and from the environment through a process called signal transduction. That process, when impaired, can lead to cancer or other illnesses. "Yeast is a very simple single-celled organism, b...

1 2 3 4 5 6 7 8 9 10