X-ray diffraction methods lie at the foundation of materials science. Determination of the crystal structures of natural minerals and, later, of crystals grown in the laboratory led to our ...

DNA microarrays provide a means to quantify tens of thousands of discrete sequences in a single assay. Among the most widespread uses of microarrays is expression profiling 1,2, which has found many ...

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...