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Tag: "sensitivity" at biology news

'Gadonanotubes' greatly outperform existing MRI contrast agents

... percent of MRIs. The contrast agents increase the sensitivity of the scans, making it easier for doctors to deliver a diagnosis. Gadolinium agents are the most effective agents and the most commonly used. In the future, the researchers hope to use existing methods of attaching disease-specific antibodies and p...

Scientists create digital bacteria to forge advances in biomedical research

...discovered that one type of protein controlled the sensitivity of E. coli's chemotaxis system, which helps the ba...ged the level of that protein, it would change the sensitivity of the cell," Emonet said. Subsequent laboratory experiments came out exactly the same way. Sometim...

Retina adapts to seek the unexpected, ignore the commonplace

...ses to novel stimuli, the researchers computed the sensitivity of individual ganglion cells to various scenes. For most cells, sensitivity to a novel scene was greater than sensitivity to control scenes to which the animals had already bee...

Women feel more pain than men, research shows

...relationship between gender differences in anxiety sensitivity and pain. Anxiety sensitivity is the tendency to be fearful of anxiety-related sensations (e.g., rapidly beating heat), and seems ...

New results validating Pall prion reduction filter disclosed at ISBT Congress

...ts that would meet the required criteria including sensitivity and specificity. The implementation of donor screening would be problematic without the availability of confirmatory assays to inform discussions with potentially infected donors. Prion Reduction Confirmed Sam Coker, Ph.D., Principal Scientist of P...

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

... not found desirable by females, indicating strong sensitivity to a set of rather narrowly defined features, such as eyespot pupils that measure approximately half of one millimeter. The most conclusive finding resulted when the researchers painted the white pupils in male eyespots on the dorsal side with a pla...

Purdue's gold nanorods brighten future for medical imaging

...is important to have a reliable technique that has sensitivity at the single-particle level," Wei said. "The gold nanorods demonstrate that Cheng's nonlinear imaging methods are capable of this level of detection." The research has been funded by the National Institutes of Health and is affiliated with the Birc...

Many cats unaffected by catnip, C&EN reports

...y, the world's largest scientific society. Catnip sensitivity is inherited, says Carolyn M. McDaniel, a veterinarian at the Feline Health Center at Cornell University in Ithaca, N.Y. A kitten with only one catnip-sensitive parent has a one-in-two chance of developing the sensitivity; if both parents have the se...

UT Southwestern researchers develop screening test for cells that activate immune system

...ssay is unique from other conventional ones in its sensitivity and cost- and time-efficiency," said Dr. Akira Takashima, professor of dermatology and vice chairman for research and head of the project. Dendritic cells (DCs) are considered key to developing future vaccines that can either mimic the body's natura...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...phere. While GOME demonstrated the first satellite sensitivity to tropospheric nitrogen dioxide, SCIAMACHY possesses superior performance, with a spatial resolution of 60 x 30 kilometres compared to 320 x 40 km for its predecessor. SCIAMACHY also observes the atmosphere in two different ways - downwards or nad...

Molecular cabal contributes to stroke damage

...icular ASIC, called ASIC1a, to greatly enhance its sensitivity to the acid induced by ischemia. This increased sensitivity causes the ASIC channel to open and flood the neuron with lethal doses of calcium. Importantly, the...

NIAID researchers show how promising TB drug works

... screened for PA-824-resistant M. tb that retained sensitivity to a close relative of PA-824. Within this subgroup of PA-824-resistant bacteria, the team identified those mutant strains with FGD1 and F420. The investigators reasoned that resistance to PA-824 in mutants possessing FGD1 and F420 must be due to a m...

Bacteria which sense the Earth's magnetic field

... the wild type in shape, size, and number. But the sensitivity of the magnetic field sensor function was disrupted; the cells could only orient themselves weakly in the magnetic field. Inspection by an electron microscope showed that the mutants' magnetosome crystals did not build a perfectly organised linear ch...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

... planning to perform animal studies, examining the sensitivity of the antibody-nanotube system in detecting cancer cells in the blood and in detecting specific types of cancer cells shed in the blood from tumors. Immunonanoshells for Selective Photothermal Therapy (Abstract 3198) and Nanoshells for Combined Ca...

PET imaging reveals the immune system at work

... the liver or the spleen. With this technique, the sensitivity for monitoring the immune system is incredible because you're seeing the whole body." That global perspective makes it possible to see critical ancillary responses in addition to the specific cellular battles of the immune system at the site of a tu...

Jefferson biologist coaxing human embryonic stem cells to make dopamine with simpler, faster method

... the liver or the spleen. With this technique, the sensitivity for monitoring the immune system is incredible because you're seeing the whole body." That global perspective makes it possible to see critical ancillary responses in addition to the specific cellular battles of the immune system at the site of a tu...

Discovering the first steps in transcription-coupled repair

...iseases with a common feature: both entail extreme sensitivity to sunlight. However, in XP there is loss of ability to repair damage to DNA caused by ultraviolet radiation throughout the genome, whereas in CS the global repair mechanism is intact but transcription-coupled repair is defective. Thus active genes c...

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

...ments, the researchers took advantage of the light sensitivity of the algal channel protein by introducing expression of a modified form of ChR2 in specific C. elegans neurons and muscle cells. The researchers found that when this form of ChR2 was expressed in muscle cells, blue-light activation of the protein w...

Carnegie Mellon U. transforms DNA microarrays with standard Internet communications tool

...n captured by DNA microarray analysis with greater sensitivity and specificity. The work holds great promise for ...urning on. Our protocol will offer greater overall sensitivity in detecting the expression of any gene, even if a gene turns on when no microarray sampling takes p...

Portable cocaine sensor developed at UC Santa Barbara

...ne." So more work needs to be done to increase the sensitivity of the new test. Last summer was the first time that Plaxco had high school students doing work for academic credit in his lab. "It was great," said Plaxco. "I thought they might be a distraction, but my students and post-doctoral fellows did a grea...

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