Brain researchers discover bright side of ill-famed molecule
...cluding the notorious ldl and hdl - are too big to pass the blood-brain barrier. Therefore, the brain depends on its own cholesterol synthesis." According to the new results glial cells produce surplus cholesterol and provide nerve cells with this component. This correlation indicates a new role for glial...Study helps identify key step in simple motor learning
...w which cells receive the stimulation and how they pass it along," explains Linden. "Now we're using that wiring diagram to look at the details." Linden is studying strange, sea-fan-shaped brain cell called Purkinje cells (pronounced per-KIN-jee). These odd cells are found only in the cerebellum, a part ......ch direction to move, chemicals in the environment pass messages to the Arp2/3 complex, which interprets the messages that orient the nerves and other cells. "Actin and Arp2/3 complex work like a peculiar motor in a car to make the cell move forward," said Pollard. "Rather than turning wheels, the filame...Antarctic plants repair themselves
...f the filters allowed harmful ultraviolet light to pass through and the rest did not. This allowed the ecologists to determine whether the ultraviolet light influences photosynthesis and the concentration of protective pigments in the plant, moss and lichen. They also investigated whether the ultraviolet ...Baxter's HomeChoice Pediatric dialysis system receives market clearance from FDA
...heter to the peritoneal cavity. Wastes and toxins pass from the bloodstream across the peritoneal membrane into the dialysis solution. Then, HomeChoice Pediatric system drains the dialysis solution through the catheter, and this cycle is repeated until the therapy session is completed. This new system f...Magnetic tag lets scientists track stem cells in living rat
...d by the MRI machine, causing water molecules that pass by to get 'out of phase,'" he explains. "When this happens, the imaging scanner loses the signal, and the area looks black on the image." Other researchers have used dendrimers containing gadolinium, which is also useful as a contrast medium for MRI,...Geophysicist studies life in the early solar system
...n you can do that, it`s not something I`m going to pass up,`` he says....NSF invites media to report on Antarctic GLOBEC research cruise
...tarctica, at no cost. Medical: The finalists must pass comprehensive physical anddental examinations conducted at their own expense by theirpersonal physicians and dentists and subject to screening by theU.S. Antarctic Program. Certain medical conditions may disqualifya candidate from participating, even...Microbe genes help scientists reconstruct animal origins
...cestors of animals and what genetic tools did they pass down to the original animals," says Sean B. Carroll, a UW-Madison professor of genetics and the senior author of the PNAS study. "This is a difficult question to answer because the events are completely invisible in the fossil record." Choanoflagell...Munching microbes aid environment, oil industry
...f Mexico if the fluids meet certain guidelines and pass tests indicating they are biodegradable and non-toxic, among other things. The guidelines reduce the discharge of pollutants that have serious environmental impact, including pollutants that kill or impair fish and aquatic organisms, cause health pro...Images reveal how body regulates salt uptake in cells
...type of ion from another and only admit those that pass the selection process. Chloride ion channels are found throughout the animal kingdom. In humans, nine different ClC channels regulate processes as diverse as salt reabsorption in the kidneys and muscle contractility. Several human disorders, includi...Another transmembrane protein structure solved by Rockefeller scientists
...llowing negatively charged ions, called anions, to pass through the membrane into the cell cytoplasm or in...Each subunit has its own pore for chloride ions to pass through. The potassium ion channel, by contrast, is a tetramer, meaning its overall structure compr...Potato technology may help move mail
...vels of ozone inactivates the spores. "We couldn't pass up the opportunity to work with O3Co.," said Ken Watts, a manager in INEEL National Security research and development. "We have some theories we want to test and they have the infrastructure. The relationship is working so well that we're creating a ...Preventing overload in the brain
...hippocampus. They process incoming information and pass on information to pyramidal cells in other areas of the brain. The interneurons can control the activity of the pyramidal cells. The researchers studied the electrical signals that nerve cells use to communicate. They found that the interneurons inh...Clamping down on a cancer-causing protein
...hief roles is to get information from proteins and pass it on to other molecules like a radio operator who receives a message telling him to turn on an alarm. If Abl is defective, it might not hear incoming messages, or it might continually send off alarms, even when it hasnt been told to do so. One of ...Tether for water channels found: May impact research on brain swelling
Brain swelling begins when water molecules pass through a microscopic "channel" into certain brain cells. In the Nov. 20 issue of the Proceedings of the National Academy of Sciences, the scientists report that alpha-Syntrophin keeps these common water channels where they belong. By tethering th...Satellites vs. mosquitoes: Tracking West Nile Virus in the U.S.
...squitoes that act as a vector carry the virus, and pass it on when feeding on hosts like birds, livestock, other animals and people. The satellite maps show nation-wide temperatures, distributions of vegetation, bird migration routes and areas pinpointing reported cases. The combined data helps scientist...New study finds undiagnosed, untreated gonorrhea, chlamydia infections common
...d. Since teens pick up infections from adults and pass them on to others, they should be included in subsequent comparable studies, Turner said. The research and parallel studies being conducted by other investigators provide a new model for studying the epidemiology of sexually transmitted diseases usin......nting subordinate males from mating. This can help pass on qualities such as strength to the next generation. But having only a few breeding males has its drawbacks. It also limits genetic variety in the population, making it more vulnerable to sudden changes in the environment-especially if numbers shri...