Washington, Feb 12: Scientists have cooked up a cocktail of enzymes to create hydrogen gas pure enough to power a fuel cell.

The team, from Virginia Tech, Oak Ridge National Laboratory (ORNL), and the University of Georgia, has produced hydrogen gas pure enough to power a fuel cell by mixing 14 enzymes, one coenzyme, cellulosic materials from nonfood sources, and water heated to about 90 degrees Fahrenheit (32 C).

Washington, Feb 12 : When considering the perfect romantic gift for your Valentine, it may be best to forgo the risky adventure vacation in favour of a safer gift, for a new study has shown that buying life experiences rather than material possessions leads to greater happiness only when purchase goes well.

What's more, a bad choice of an experience could make your valentine unhappy for a much longer time than will a badly chosen material gift.

Washington, Feb 12: New findings indicate that seamounts may serve as refuges for deep-sea animals that struggle to survive elsewhere.

Over the last two decades, marine biologists have discovered lush forests of deep-sea corals and sponges growing on seamounts (underwater mountains) offshore of the California coast.

It has generally been assumed that many of these animals live only on seamounts, and are found nowhere else.

However, two new research papers show that most seamount animals can also be found in other deep-sea areas.

Seamounts, however, do support particularly large, dense clusters of these animals. These findings may help coastal managers protect seamounts from damage by human activities.

Washington, Feb 12 : A new study has suggested that the genome of the evolutionary ancestor of humans and present-day apes underwent a burst of activity in duplicating segments of DNA.

"The new study shows big differences in the genomes of humans and great apes within duplicated sequences containing rapidly evolving genes. Most of these differences occurred at a time just prior to the speciation of chimpanzees, gorillas, and humans," said University of Washington (UW) researchers Tomas Marques-Bonet and Jeffrey M. Kidd who headed the study.

Washington, Feb 12: Engineers at the National Institute of Standards and Technology (NIST) in the US have developed viscosity-enhancing nanomaterials that are expected to double the service life of concrete.

The nano-sized additive slows down penetration of chloride and sulfate ions from road salt, seawater and soils into the concrete.

A reduction in ion transport translates to reductions in both maintenance costs and the catastrophic failure of concrete structures.

The new technology could save billions of dollars and many lives.

The American Society of Civil Engineers estimates that Americans spend 54 billion dollars each year to repair damages caused by poor road conditions.

Washington, Feb. 12 : Republicans have zeroed into Indian American Louisiana Governor Bobby Jindal to give their official response to President Obama''s February 24 address to a joint session of Congress.

"Governor Jindal embodies what I have long said: the Republican Party must not be simply the party of ''opposition,'' but the party of better solutions," the Washington Times quoted House Minority Leader John A. Boehner (Ohio Republican) as saying while announcing the party's decision.