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168,132 articles from ScienceDaily

Knowing when poultry goes foul

Mom's trusty nose may be good, but now researchers have gone her one better by designing an instrument that quickly and precisely sniffs trace amounts of chemical compounds that indicate poultry spoilage without damaging the product itself.

Switch that enables Salmonella to sabotage host cells revealed

A new switch that enables Salmonella bacteria to sabotage host cells is revealed in a new study. Researchers say that the discovery could ultimately lead to drugs that interfere with the switch in order to combat Salmonella and possibly other bacterial infections. In humans, Salmonella causes diseases ranging from gastroenteritis to typhoid...

New detector counts photons with 99 percent efficiency

Scientists have developed the world's most efficient single photon detector, which is able to count individual particles of light traveling through fiber optic cables with roughly 99 percent efficiency. The scientists' efforts could bring improvements to secure electronic communication, advanced quantum computation and the measurement of optical...

Sierra Nevada yellow-legged frog's site fidelity may lead to further decline

No longer found in 90 percent of its previously occupied habitat, the Sierra Nevada yellow-legged frog is further threatened by cumulative impacts of a changing climate, introduced non-native trout and site fidelity habits, hampering the breeding success of this imperiled frog. New research underscores the need to incorporate the site fidelity habits of this frog when designing restoration...

Sequence is scaffold to study sleeping sickness

Researchers have published the genome sequence for T. b. gambiense -- the strain of Trypanosoma brucei responsible for almost all cases of sleeping sickness in humans. A remarkable level of similarity with the previously sequenced bovine infecting strain suggests the sequences provide a foundation for studies into how these parasites cause disease. The team found no genetic cause for T. b....

Source of zodiac glow identified

The eerie glow that straddles the night time zodiac in the eastern sky is no longer a mystery. First explained by Joshua Childrey in 1661 as sunlight scattered in our direction by dust particles in the solar system, the source of that dust was long debated. David Nesvorny and Peter Jenniskens put the stake in asteroids. More than 85 percent of the dust, they conclude, originated from Jupiter...

Breakthrough for babies born with severe cleft palates after experiments at ISIS

Scientists working on a treatment for babies born with cleft palates have made a promising breakthrough and the first clinical trials are planned for early next year. Clefts are the most common birth defect in Britain, with one in every 700 babies affected; currently in severe cases radical surgery is required to correct the problem, and in addition future complications can occur as the child...

Personalized medicine for cancer patients in a new technology era

A paper authored by over 200 members of the International Cancer Genome Consortium describes the beginnings of a Brave New World: a new era of personalized medicine for cancer patients. Formed in 2008, the consortium brings together leading cancer researchers from around the world, working together to catalog the genetic changes of the 50 most common cancers -- 500 genomes from each cancer type --...

Electronic 'nose' can predict pleasantness of novel odors

Scientists have 'trained' an electronic system to be able to predict the pleasantness of novel odors, just like a human would perceive them. The researchers argue that the perception of an odor's pleasantness is innately hard-wired to its molecular structure, and it is only within specific contexts that personal or cultural differences are made...

Scientists isolate portion of virus that causes pink eye

Viral keratoconjunctivitis, also known as pink eye, is a common, uncomfortable and highly contagious condition. But now, relief may be in sight with a new understanding of how the eye reacts to this virus. Researchers used a novel model to determine what part of the virus is responsible for inflammation in pink...

Many patients don't know they had minor stroke, need emergency care

As many as 70 percent of patients were unaware they suffered a minor stroke and almost one-third of patients delayed seeking medical attention for more than 24 hours, according to a British study. Patients showed an overall lack of awareness about how to identify symptoms of minor stroke regardless of their age, gender, education and socioeconomic status. Researchers suggest more public awareness...

Pinning down a proton

Scientists have developed a new method for describing the binding of protons and neutrons within nuclei. This method may improve scientists' ability to predict and understand astrophysical reactions within stars.

Rock of ages: Clues about Mars evolution revealed

Through the study of a popular Martian meteorite's age, researchers have made significant discoveries about the timeline of volcanic activity on Mars. Their data showed that the true age of the famous Martian meteorite ALH84001 is about 400 million years younger than earlier age...