A laboratory experiment that involves solving problems with conflicting evidence or inconsistent data. The experiment gives students opportunities to reason as scientists. (EB)

Describes an experimental biochemistry course designed to teach basic biochemical techniques using an unstudied enzyme as the experimental material. Explains the schedule of experiments designed for the course and lists the sources used. (GS)

Describes the use of integrated circuit voltage regulators in electrolytic titration instruments. (MLH)

Described is the equipment and procedures used to prepare and display petrological (thin rock) sections without the use of sophisticated apparatus. (SL)

Discusses a high school laboratory in which the students take an active role in designing, implementing, and performing experiments concerning basic concepts in physics. (MLH)

Describes several chemistry projects, including solubility, formula for magnesium oxide, dissociation of dinitrogen tetroxide, use of 1-chloro-2, 4-dinitrobenzene, migration of ions, heats of neutralizations, use of pocket calculators, sonic cleaning, oxidation states of manganese, and cell potentials. Includes an extract from Chemical Age on…

Describes an undergraduate experiment in which the structure of bis(2-ethylhexyl)phthalate (I) is analyzed and interpreted using Carbon-13 magnetic resonance. (MLH)

Described are science experiments which utilize methylene blue to demonstrate the effects of pH, temperature inhibitors, and concentration on enzyme reactions in yeast enzyme systems. (SL)

Describes an electronic digital counter, a speed-of-light experiment using a television, a simple out-of-circuit method for determining if a transistor is made of silicon or germanium, and the use of dry cells to power TTL integrated circuits. (MLH)

Brazilian engineering schools are under a strict program to reengineer their courses with the financial support of the federal agencies. At the electronic engineering department at the University of Sao Paulo, this process started by modifying the Basic Electricity and Electronic Laboratories. This paper describes the new structure of these labs…

Discusses a laboratory course with computer-assisted instruction which emphasizes uses of simulated data, students' improvement of experiments, and presentation of a tutorial self-test mode. Indicates that students' enthusiasm is mostly due to computer's potential for in-depth interactivity and conformity to real-life situations. (CC)

Discusses experience of conducting a project designed to interest and train women in physics, involving student recruitment, course design, laboratory work planning, and counseling services. Included are surveyed faculty and graduate student comments and participants' attitudes toward the project. (CC)