Washington, Feb 25: A scientist has discovered a new enzyme that teaches yeast cells to ferment an unused waste sugar known as xylose, into ethanol, which is used for biofuel production.

The scientist in question is Eckhard Boles, co-founder of the Swiss biofuel company Butalco GmbH and a professor at Goethe-University in Frankfurt, Germany.

In industrial fermentation processes, the yeast Saccharomyces cerevisiae is commonly used for ethanol production.

Current bioethanol production technologies can use only parts of the plants, namely the storage sugars, like glucose, sucrose or starch.

However, this technology is in competition with food and feed production.

Washington, Feb. 25: Even as President Barack Obama delivered his first address to a joint session of the US Congress, a debate has surfaced over his speaking skills.

While some admire Obama''s ex-tempore speaking skills, there are others who mock and say that he is only comfortable with teleprompters.

From the 2004 Democratic convention speech that launched him onto the national stage to his acceptance of his party''s nomination four years later, Obama''s public speaking skills have been considered one of his strongest assets.

Washington, Feb 25:  insists that she has no plans of giving up her Hollywood career to focus on her clothing line.

The `Factory Girl' star launched Twenty8Twelve, her collection with sister Savannah, in 2007, and displayed her new collection at London Fashion Week.

Despite the success of her stint as a fashion designer, Miller insists she won't give acting.

"I''m not giving up acting, I love acting. But I also love working with my sister," Contactmusic quoted her as saying.

Washington, February 25 : The Jonas Brothers are set to woo the audience at the Nickelodeon Kids'' Choice Awards, that features the famous slime throwing stunts on celebrities.

The American pop-rock band, who won the Favourite Music Group category at last year's show, will perform at the event in Los Angeles on March 28.

They will also be in queue to be slimed while competing for the Favourite Music Group category again.

Washington, Feb 25: New mum Mel

Washington, Feb 25: The television production team at NASA Goddard Space Flight Center in the US has made new, fully spherical short film called "Return to the Moon", which takes imagery and data sets from the Apollo, Clementine, and other missions and projects them on a six-foot sphere.

Designed expressly for the Science On a Sphere platform, it opens in science museums and elsewhere around the US on February
27.

The six-foot sphere gives the startling impression of the moon hanging magically in the center of darkened theaters.