Tag: "channels" at biology news

Climate models need deeper roots, scientists say

...t, in vegetated ecosystems, plants are the primary channels that connect the soil to the atmosphere, with plant roots controlling the below-ground dynamics. "Most climate models assume that roots are shallow -- usually within 6 feet of the surface -- and that only the soil moisture near the surface can signif...

Scientists pool information to boost understanding of drug action

...proteins: G Protein-coupled receptors (GPCRs), ion channels and nuclear hormone receptors. Drugs which work through GPCRs include treatments for asthma, ulcers and heart disease. Professor Tony Harmar, Head of the School of Biomedical Sciences at the University said: "The Human Genome Project has sparked a h...

Sontra Medical and HortResearch form partnership to develop sports performance technology

...zing the lipid bi-layer, creating tiny, reversible channels through which fluids can be extracted and delivered. The skin goes back to its normal state within 24 hours. Currently marketed by Sontra Medical for accelerating delivery of topical anesthetics, SonoPrep is also the subject of clinical research in g...

Molecular cabal contributes to stroke damage

...n sensation, "a similar coupling between these two channels is likely to occur in these diseases as well."...

$1 million grant from Howard Hughes Medical Institute to fund joint neuroscience program

...nisms controlling function of ion transporters and channels in nerve and muscle. Robert Miura's research focuses on developing mathematical models in neuroscience for cell dynamics. He is a Fellow of the American Association for the Advancement of Science, the John Simon Guggenheim Foundation and the Royal So...

APS physics tip sheet #57

... without the sharp-cornered channels. The thinnest channels dried fastest, and relative humidity did not affect the drying rate, up to relative humidity of more than 90%. The results could be useful for designing more efficient heat pipes for cooling chips, or possibly in applications where rapid drying is de...

Mechanism of new 'sudden-death' arrhythmia detailed

...citable cells within the pancreas that use calcium channels to regulate the insulin production," said Bennett, who first discovered ankyrin in 1978. "It may be possible that what we have learned about ankyrin-B's role in maintaining calcium balance in the heart may also hold true in the pancreas."...

New understanding of regeneration gained by Forsyth scientists

...nding how cells communicate through gap junctional channels we can gain a greater understanding of how we can possibly direct this process in tissues that don't currently regenerate; this has clear applications towards induction of regeneration in biomedical settings." Dr. Levin and his team ultimately hope t...

Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace

...es sensitive to the opening and closing of calcium channels on neurons. The scientists created an imaging grid across the glomeruli and measured the ratio of fluorescence versus nonfluorescence over time. Galn then used advanced mathematical techniques to process the images and create a matrix of the extent (...

JCI table of contents November, 2005

...t blocking excitatory NMDA-type glutamate receptor channels is sufficient to prevent excitotoxic injury and subsequent neurodegeneration that is the substrate for neurologic disease. But a new study appearing on November 1 in The Journal of Clinical Investigation by Matthew Bellizzi and colleagues from Unive...

New discoveries about neuron plasticity linked to learning and memory

...of the journal Nature Neuroscience, shows that ion channels distributed in the dendritic membrane change during a simulated learning task and that this requires the rapid production of new proteins. "Our new work strongly supports the idea that learning involves changes in dendrites," says Dr. Daniel Johnsto...

An existing diuretic may suppress seizures in newborns

...ls. In adult nerve cells, GABA activation opens up channels that allow chloride to move into the cell. The cell thereby acquires a negative charge and becomes less excitable, inhibiting seizure activity. But in newborns, chloride is already high, and therefore activating GABA receptors causes chloride to move...

Stem cells' electric abilities might help their safe clinical use

...ins have discovered the presence of functional ion channels in human embryonic stem cells (ESCs). These ion channels act like electrical wires and permit ESCs, versatile cells that possess the unique ability to become...

Jefferson scientists uncover new clues to how crucial molecular gatekeepers work

... mysteries in molecular biology is exactly how ion channels tiny protein pores through which molecules such a... potassium flow in and out of cells operate. Such channels can be extremely important; members of the voltage-gated ion channel family are crucial to generatin...

Two Sandia microChemLab technologies soon to be checking for toxins in the nation's water supplies

... bands in seconds to minutes. Separations occur in channels as narrow as a human hair coiled onto a glass chip about the size of a nickel. Curtis Mowry, principal investigator for the New Mexico project, says his team is seeking to develop a device that detects trihalomethanes, undesirable byproducts of the c...

Molecular defect found that may cause heart failure

...s) malfunction in the failing heart. The RyRs form channels that become leaky, leading to calcium imbalances t...en it contracts. At the end of a contraction, the channels close tightly. Molecular pumps, also located in the walls of the SR, then suck the released calcium ...

Protein structure key for AIDS, cell function

...cium messenger molecules, each of which then opens channels for the release of calcium from specific stores, or reservoirs, within cell organelles. High intensity X-rays made it possible to pass photons through a protein crystal to reveal its structure. Cornell's synchrotron produces beams of X-rays millions ...

Water management in cells

...nciple is known as osmosis. Cells activate various channels to remove excess water and salt or osmotically act...hanges are facilitated by the presence of specific channels that transport water. Slow organic reaction In addition to water channels and ion channels, organ...

'Nanospheres' that block pain of sensitive teeth

...ntine is made up of thousands of tiny fluid-filled channels which radiate outwards from the nerve endings at t... and physical contact can cause the fluid in these channels to move in or out triggering the nerve endings and causing sharp pain. If these channels (or 'tub...

K-State professor developing new strategies for delivery of drugs to fight, treat tuberculosis

...ting to understand the working principles of porin channels in natural and artificial environments and he hope... irreversibly within those channels, depriving the channels of any possibility to take nutrients in or to discharge waste from its metabolism," he said. "This a...

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(Date:11/4/2014)... amount of death at the right time might actually ... research that could help in understanding animal populations, pest ... a paper in the journal Trends in Ecology ... colleagues conclude that the kind of positive population effect ... or mortality, depends on the size and developmental stage ...
(Date:11/4/2014)... majority of Madagascar,s 101 species of lemurs are threatened ... the rainforests they call home. A new study by ... have on rainforest tree populations, which raises concerns about ... region,s rich biodiversity. , A large proportion of trees ... Lemurs in turn disperse the seeds of their fruit ...
(Date:11/3/2014)... report that low birth weight and preterm birth are ... in adulthood. Findings published in the American College of ... indicate that low birth weight and pre-term babies were ... OA as adults. , According to the ACR, ... diagnosed with clinical OA. Symptoms of OA range from ...
Breaking Biology News(10 mins):When less is more: Death in moderation boosts population density in nature 2Gardeners of Madagascar rainforest at risk 2Gardeners of Madagascar rainforest at risk 3Preterm, low birth-weight babies may need new hips in adulthood 2
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