The continuous measurement of oxygen consumption in an enzymatic reaction is a frequent experimental fact and extremely important in the enzymatic activity of oxygenase. An electrochemical system, based on a polarographic method, has been developed to monitor the oxygen uptake. The system developed and electrode used are described. (JN)

For colleges/universities, rapid instrument development poses a dilemma, since laboratory teaching instruments rapidly become obsolete and money available for replacing them is dwindling. Discusses role of sophisticated computer simulations, nontraditional educational materials, and part-time work-study opportunities as possible solutions to the…

Describes a three-part experiment designed to introduce cyclic voltammetry to graduate/undergraduate students. Part 1 demonstrates formal reduction potential, redox electron transfer, diffusion coefficient, and electrochemical reversibility. Part 2 investigates electrochemical behavior of acetaminophen. Part 3 examines such experimental variables…

A PASCAL graphics and instrument interface program for a Z80/S-100 based microcomputer was developed. The computer interfaces to a stopped-flow spectrophotometer replacing a storage oscilloscope and polaroid camera. Applications of this system are discussed, indicating that graphics and analog-to-digital boards have transformed the computer into…

An apparatus simulating residential thermostat control was developed to test claim that lowering house thermostats saves energy and to give students a better understanding of how thermostats work. The apparatus (includes diagram of same) and student activity are described. (JN)

Describes the scanning electron microscope, including detection signals (secondary, backscattered, and absorbed electrons and x-rays) sample handling, and applications in various science areas. (SK)

Describes an inexpensive, easily constructed, and safe vertical slab gel kit used routinely for sodium dodecyl sulphate-polyacrylamide gel electrophoresis research and student experiments. Five kits are run from a single transformer. Because toxic solutions are used, students are given plastic gloves and closely supervised during laboratory…

Describes an inexpensive tensiometer, a balance consisting of a plastic drinking straw as the crossarm, a needle as a pivot, and wire loop counter balance to assure proper balance. The instrument permits the quantitative demonstration of interfacial tension and effects of various agents that modify it. (Author/JN)