Outlines the prospects of generating coherent x rays using high-power lasers and indentifies problem areas in their development. Indicates possible applications for coherent x rays in the fields of chemistry, biology, and crystallography. (GS)

Reviews the areas of laser chemistry, photochemistry, infrared lasers, and laser induced molecular reactions. (SL)

Discusses recent progress in using tunable lasers to selectively separate substances at the atomic and molecular level. Emphasizes biological applications, such as selective excitation and breaking of hydrogen bonds in DNA. (MLH)