Quantitation of Lipid Transfer Activity (J. Wetterau and D. Zilversmit). Measurement of Oxygen Consumption by the Spectrophotometric Oxyhemoglobin Method (O. Barzu). The pH Jump: Probing of Macromolecules and Solutions by a Laser-Induced, Ultrashort Proton Pulse - Theory and Applications in Biochemistry (M. Gutman). Density Gradient Electrophoresis of Mammalian Cells (A. Tulp). Historical Development and Newer Means of Temperature Measurement in Biochemistry (R. Berger et al.). Laser Photolysis in Biochemistry (S. Chan and R. Austin). Author and Subject Indexes.