834,224 articles

Deep Sequencing May Lead To Hardier Strains Of Rice

Using a novel "deep sequencing" technology that can in one fell swoop decode 50 million sequences representing well over a billion bases of DNA, a research team is working to unmask where, why and how certain genes are switched on or off in rice -- a crop vital to the world's food supply. The project may lead to development of hardier strains of rice and other cereal grains.

New Light Shed On Hybrid Animals

What began more than 50 years ago as a way to improve fishing bait in California has led a researcher to a significant finding about how animal species interact and that raises important questions about conservation. In the middle of the 20th century, local fishermen who relied on baby salamanders as bait introduced a new species of salamander to California water bodies. These Barred Tiger...

Women Prescribed Drugs Linked To Birth Defects Not Often Advised To Use Birth Control

Although prescription medications that may increase the risk of birth defects are commonly used by women in their childbearing years, only about half receive contraceptive counseling from their health-care providers, according to a large-scale study. The study found that one in six women of reproductive age filled a prescription for a medication labeled by the FDA as increasing the risk of fetal...

Genes And Drugs Team Up To Lower Blood Pressure

Patients with high blood pressure respond very differently to anti-hypertensive medication, making treatment selection tricky for physicians. But new research pinpoints a number of gene-drug interactions that could allow medication to be tailored to individual patients based on their genetics.

Repairs Could Delay Shuttle Mission

NASA has decided to replace leaky hydraulic seals aboard the space shuttle Discovery, which might cause a delay in a launching planned for Oct. 23. The leak was traced to the right main landing gear strut, which cushions the impact when the shuttle lands. Early efforts to correct the problem by cycling the hydraulic system did not work as well as officials had hoped, and so “the decision...

Better Displays On Laptop Computers, Cell Phones Coming Soon

Chemists working at the nanoscale have developed a new, inexpensive means of forcing luminescent polymers to give off polarized light and of confining that light to produce polymer-based lasers. The research could lead to a brighter polarized light source for LEDs in laptop computers, cell phones and other consumer electronics devices.

Closing In On Genes Involved With Rheumatoid Arthritis

There is strong evidence that a region on chromosome 9 is associated with rheumatoid arthritis. Scientists found a consistent association with one specific region of the genome -- a region on chromosome 9 that includes the two genes, complement component 5 (C5) of the complement system (a primitive system within the body that is involved in the defense against foreign molecules) and a gene...

Increase In Atmospheric Moisture Tied To Human Activities

Observations and climate model results confirm that human-induced warming of the planet is having a pronounced effect on the atmosphere's total moisture content. The water vapor feedback mechanism works in the following way: as the atmosphere warms due to human-caused increases in carbon dioxide, methane, nitrous oxide, and chlorofluorocarbons, water vapor increases, trapping more heat in the...

Liver Cancer Marker Could Yield Blood Test For Early Detection

In the face of an emerging liver cancer crisis in Asia, researchers have developed a test that could help millions. Due to widespread hepatitis B virus (HBV) infection, nearly 10 percent of China's population is at high risk for hepatocellular carcinoma (HCC), a liver cancer with low survival rates if not detected and treated early. Researchers report on a new blood screening technique that could...