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Tag: "detecting" at biology news

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

...or the behavior of thousands of genes over time by detecting changes in the expression of as many as 30,000 dif...protocol will offer greater overall sensitivity in detecting the expression of any gene, even if a gene turns on when no microarray sampling takes place." Bar-J...

New nanosensor uses quantum dots to detect DNA

...search, demonstrated its potential in their lab by detecting a sample of DNA containing a mutation linked to ovarian cancer. The Johns Hopkins team described the new DNA nanosensor in a paper published in the November 2005 issue of the journal Nature Materials. "Conventional methods of finding and identifyin...

Bird song changes sound alarm over habitat fragmentation

...vocalisations might become an early warning system detecting the effects of fragmentation over relatively short times and before other indicators - such as genetic markers - show any change," they say. Sharing song types - when a male replies to a rival's song with the same song sequence - with neighbours is ...

Pregnancy drugs can affect grandkids

...vocalisations might become an early warning system detecting the effects of fragmentation over relatively short times and before other indicators - such as genetic markers - show any change," they say. Sharing song types - when a male replies to a rival's song with the same song sequence - with neighbours is ...

Portable cocaine sensor developed at UC Santa Barbara

A real-time sensor for detecting cocaine –?made with inexpensive, off-the-shelf ele...e Alan Heeger said, "We have developed a method of detecting small molecules and proteins in a way that is not specific to cocaine –?a whole class of biosensors ...

Frog’s ear canal may provide insights for understanding human hearing loss

...an vertebrate found to be capable of producing and detecting ultrasounds for communication, much like dolphins, bats and some rodents. It does so, the researchers report, to make itself heard above the din of low-frequency sounds produced in its surroundings so that it can communicate territorial information t...

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

...ow valuable large-scale genomics studies can be in detecting novel biological targets," says the study's senior author, Aravinda Chakravarti, Ph.D., director of the McKusick-Nathans Institute for Genetic Medicine at Hopkins. "This study, conducted during the early days of a new technology, would have been impo...

First SCID gene chip to be introduced at Academy meeting on immunodeficiencies

The first gene chip ever to be developed for detecting SCID (primary immunodeficiency) in newborns will be presented to researchers for the first time at the New York Academy of Sciences' and Jeffrey Modell Foundation's one-day conference, Primary Immunodeficiencies: Past, Present, Future. The meeting w...

How taste response is hard-wired into the brain

...in that holds that specific cells are dedicated to detecting specific tastes. Competing models hold that multiple neurons combine information to encode taste, or that the timing of patterns of taste information encodes taste. In their studies, the researchers explored the behavioral effects of activating fly...

Amazon rainforest greens up in the dry season

...asure, called Enhanced Vegetation Index (EVI), for detecting greenness in MODIS images of very highly vegetated rainforests. Greenness is an indicator of active plant growth. Plants are green because they contain the photosynthetic pigment chlorophyll. Growing plants generate more chlorophyll and therefore lo...

Less is more, gene study shows

...: The ability to taste bitterness is important for detecting toxins in food, and most of those toxins are in plants. About 1 to 2 million years ago, we started eating more meat rather than plants, and also there was use of fire, which can detoxify foods." Loss of function also is expected in genes related to ...

Hantavirus found in African wood mouse

...orted from Africa, and they had the technology for detecting unknown hantaviruses. "We are also planning to look for other emerging viruses in our rodent collection," said ter Meulen. To isolate the virus, the team collected blood samples from more than 600 rodents. Using a technique called reverse-transcript...

Molecule by molecule, new assay shows real-time gene activity

...lly, the low sensitivity of current techniques for detecting gene expression has restricted analysis to highly expressed genes. Xie's new assay addresses all three limitations. He and his colleagues melded a yellow fluorescent protein called Venus with Tsr, a hydrophobic membrane protein. The inclusion of the...

Wound monitor 'sniffs out' infections

... monitor the state of a patient's wounds simply by detecting bad bacteria in the air emitted from the wound. Using state of the sensors we will be able to detect and diagnose the presence of an infection almost instantaneously." The device will use new hybrid sensor technology with a mobile laboratory-based m...

New test to detect rare proteins in blood

...cine have developed a paradigm-shifting method for detecting small amounts of proteins in the blood. Applicatio...es present in a blood sample. The sensitivity of detecting molecules by the new method, called FACTT, short for Florescent Amplification Catalyzed by T7-polyme...

Berkeley researchers lay groundwork for cell version of DNA chip

...tment. "Cell chips could be used as biosensors for detecting the presence of pathogens, or for drug screening, just to name of a few of the many possibilities." Chandra is the lead author of a paper that appears in the latest issue of the international chemistry journal Angewandte Chemie. The other authors a...

Dogs keep dying: Many owners unaware of toxic dog food

...or dogs by Cornell researchers, have high value in detecting affected dogs but require collection of a special blood sample (citrated plasma sample) and an assessment by Cornell's Animal Health Diagnostic Center. Any dog suspected of aflatoxin poisoning should also have a liver specimen sent to Cornell to def...

UF scientists trace origin of shark's electric sense

...f electrosensory cells that allows them to hunt by detecting electrical signals generated by prey," said Martin Cohn, a developmental biologist with the departments of zoology and anatomy and cell biology, and the UF Genetics Institute. "That doesn't mean they can only detect electric fish. They can sense elec...

All placebos not created alike

...the past year as more and more lab experiments are detecting immediate physiological responses to placebos. A new study takes placebo investigations out of the lab and into a clinical trial, showing a discernible placebo effect over time, according to an article in the Feb. 1 British Medical Journal. While r...

Researchers use mass spectrometry to detect norovirus particles

...rometry was used to demonstrate the feasibility of detecting norovirus particles in the purified concentrates. ...d public health preparedness as a tool for rapidly detecting norovirus--a category B bioterrorism agent--and other viral public health threats. The study is publ...

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