For scientists attempting to understand how the building blocks of RNA originated on Earth, guanine -- the G in the four-letter code of life -- has proven to be a particular challenge.

BOSTON, Nov.

BOSTON, Feb. 20 /PRNewswire/ -- adenin TECHNOLOGIES, provider of enterprise Intranet portal software, announces that KMWorld recognizes adenin as one of the "100 Companies That Matter in Knowledge Management (KM)" for 2009.

Researchers are closer to developing therapies to combat the deadly tularemia infection, according to a study published this week in the Proceedings of the National Academy of Sciences' online Early Edition.

Experiments show that simple molecules can combine chemically rather than biologically to form the building blocks of DNA, the key component of all life forms. These processes might have taken place on primitive earth, but how they occur is an unsolved puzzle.