Tag: "circuit" at biology news
Bursts of waves drive immune system 'soldiers' toward invaders
... along is generated by the same kind of three-part circuit
that fires electrical signals along a neuron or pr... seen under the microscope. The cell-propelling circuit
contains a third component that makes it self-sustaining. The researchers found evidence that before...
Disabling a sensory organ prompts female mice to act like male mice
... a pheromone-detecting organ that engages a neural circuit
that determines whether a mouse shows its feminine... sensory-controlled neural switch that governs the circuit
is most likely different in male and female mice, Dulac noted, but that may be the extent of gender ...
A sensory organ, not the brain, differentiates male and female behavior in some mammals
...gan may be needed to grow a female-specific neural circuit
during development, or the mature female mouse brain may require vomeronasal activity to repress male behavior." To test these two alternatives, Dulac and her colleagues excised vomeronasal organs from the nasal septa of normal adult females. These...
Altering a protein makes mice less fearful
...SIC1a have altered neuronal activity in these fear circuit
structures. The researchers speculate that because the gene is localized to brain regions involved in fear, targeting the ASIC1a protein might have a more focused effect on anxiety with fewer side effects than existing treatments, which affect syst...
Fedoroff, of Penn State, to receive National Medal of Science
...ique type of heritable, but reversible, regulatory circuit
-- now called epigenetic -- that controls the mobility of transposons. After moving to Penn State in 1995 as the Willaman Professor of the Life Sciences, she founded and directed a multidisciplinary organization now known as the Huck Institutes of ...
American Chemical Society's Weekly PressPac -- July 11, 2007
...circuitry and can cause electrical shorts that fry circuit
boards. Just as a tiny blood clot can fell a seemingly hale human, a tin whisker can bring an electronic device to its knees, writes C&EN senior editor Sophie L. Rovner. Electrical shorts caused by growth of these needle-like crystals have knock...
New insights into the neural basis of anxiety
... receptor for the messenger serotonin and a neural circuit
involving a brain region called the hippocampus pl... of ambiguous stimuli. "Shutting down a specific circuit
in the hippocampus abolished fear reactions only to ambiguous cues," says Theodoros Tsetsenis who ca...
JCI table of contents: May 24, 2007
...s have highlighted the importance of a brain-liver circuit
in controlling glucose and insulin handling in the body. In a study appearing online on May 24 in advance of publication in the June print issue of the Journal of Clinical Investigation, Luciano Rossetti and colleagues from Yeshiva University found...
Fragile X syndrome -- A stimulating environment restores neuronal function in mice
...entiation" that is central to the formation of new circuit
pathways in learning and memory. The researchers experiments showed that this reduction was due to abnormalities in the pore-like channels that regulate the flow of calcium into neurons. Importantly, they found that increased stimulation of neurons...
National Academy of Sciences elects 2 Brandeis University scientists to membership
...ements to understand how neuromodulators influence circuit
behavior, and most recently to understand the limits of variability across individual animals. Miller has spent his research career studying the molecular underpinnings of the generation of electricity within the cell. The ion channels, a subcla...
Salk scientists hammer out a pathway that promotes muscle cell survival in mice
... types. "In addition to muscle, this regulatory circuit
is present in brain and heart tissue, where it also seems to control cell survival," said Marc Montminy, M.D., Ph.D., professor in the Clayton Foundation Laboratories for Peptide Biology at the Salk Institute and senior author of the study. "Therefor...
New way to catch cancer's spread, rapid 3-D retinal imaging, more at CLEO/QELS 2007
...aging biological objects to making nanometer-scale circuit
patterns. (Paper QTuD3, "Optical 'Hyperlens': Far-field Imaging beyond the Diffraction Limit") MAGNIFYING SUPERLENS RESOLVES DETAILS AS SMALL AS 70 NM The University of Maryland's Igor Smolyaninov will describe what his group calls a "magnifying ...
Networking around the clock
...at this property is provided by an adaptable brain circuit
of oscillating neurons, capable of responding specifically to different environmental cues. Previous research by the same team in the lab of Michael Rosbash had already demonstrated that two groups of neurons, called morning cells and evening cells, ...
A 'traffic light' for neurons means 'go' for improving brain research
...y step toward the important goal of mapping neural circuit
dynamics on a millisecond timescale to see if impa...he causal role of specific cell types is in neural circuit
function." Knowing the effects that different neurons have could ultimately help researchers figur...
Pezcoller Foundation-AACR International Award for Cancer Research recognizes Mina J. Bissell
...of biological function is the integrated signaling circuit
provided by the tissue (organ) architecture. She is being honored for systematically looking beyond the single cell, showing that the interaction of cells with each other and with the ECM and the rest of the microenvironment influence cell prolifera...
Cells use 'noise' to make cell-fate decisions
...et of genes turned on the same hard-wired genetic circuit
there will still be slight variations in the amou...es produce, some fluctuation in the amount of each circuit
component. No two cells are alike in terms of their chemical composition." Conventional scientific...
Novel salamander robot crawls its way up the evolutionary ladder
..."Nature found a nice way of making a sophisticated circuit
in the spinal cord and then controlling the muscles from there," notes Ijspeert. "Its a fantastic solution for coordinating multiple degrees of freedom in a simple distributed way." Robots that could change their speed, direction, and gait based on s...
UN, industry, others partner to create world standards for e-scrap recycling, harvesting components
...cals such as: brominated flame retardants (used in circuit
boards and plastic computer cases, connectors and cables); PCBs (in transformers and capacitors); and lead, mercury, cadmium, zinc, chromium and other heavy metals (in monitors and other devices). Studies show rapidly increasing concentrations of the...
ACS News Service Weekly PressPac -- February 14, 2007
...he most troublesome components of e-waste printed circuit
boards (PCBs). In a report scheduled for the Feb. 15 edition of ACS' Environmental Science & Technology, a semi-monthly journal, Zhenming Xu and colleagues point out that PCBs are an ideal target for recycling and reuse. PCBs are self-contained mo...
Authors, illustrator win AAAS/Subaru SB&F Prize for Excellence in Science Books
...tivities. For example, students can build a simple circuit
to test various materials for electrical conductivity. History The AAAS/Subaru SB&F Prize for Excellence in Science Books celebrates outstanding science writing and illustration for children and young adults. The Prize began in 2005 by looki...
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