MAD COW DISEASE: A PROMISING NEW BLOOD TEST.

Reports on news regarding scientific and technological developments as of November 1, 1999. Research at the National Animal Disease Center on perfecting a blood test that can diagnose mad cow disease; An announcement by researchers at Northwestern University that they have invented the world's smallest plotter; The identification of an enzyme, called PKCe, that regulates the craving for alcohol in mice, by researchers at the University of California-San Francisco.