Describes the theory and performance of a diffusion experiment based on the free boundary method. Suitable for biochemistry and microbiology students taking physical chemistry. (MLH)

Describes a set of laboratory experiments that illustrate proteolytic enzyme action and specific properties of bromolain, including some insights into the active site mechanism of peptide hydrolysis. (MLH)

Describes two laboratory experiments involving metal ions and porphyrin ligands. (MLH)

Describes a simple digital waveform synthesizer, a chronograph for measuring projectile velocities, and a versatile beam splitter for holographers. (MLH)

Describes a technique by which room temperature phosphorescence of simple organic molecules can be demonstrated in the lecture hall or laboratory. (MLH)

Presents a kinetic study that utilizes a method for varying the concentrations of the possible Ce(IV) species and computing the concentration distribution of the sulfato and hydroxo species of Ce(IV). (MLH)

Describes several spectral experiments utilizing nuphthalene derivatives that display room-temperature phospharescence. (MLH)

The Personal Growth Encountertapes are a program of interpersonal exercises for groups of eight to 10 persons. Instructions are presented on a set of audio-tape recordings, one for each of the 10 sessions. (Author)

Discusses research strategies employed in studies of the importance of adult social cues in controlling children's behavior, illustrating some of the limitations of sole reliance on laboratory paradigms for achieving an understanding of both the contemporaneous operation and the development of social cue effectiveness. (JH)

Outlines an approach for helping student teams assign roles to each participant for doing portions of the experiment and writing the report. Discusses teaching of technical report writing as outlined in the Style Manual of the American Institute of Physics. (MLH)

An accident prevention/safety check list for chemistry laboratories is printed. Included are checks of equipment, facilities, storage and handling of chemicals, laboratory procedures, instruction procedures, and items to be excluded from chemical laboratories. (SL)

Tests the hypothesis that the effectiveness of discriminative stimuli as reinforcers is a function of the magnitude of the difference between them. (Author/RK)

Describes a management plan for thirty individualized learning studios in the general music class. (Editor/RK)

This article outlines the linguistic, technological, and methodological criteria for language laboratory use as specified by CILA (Swiss Interuniversity Commission for Applied Linguistics). (Text is in French.) (CDSH/CLK)

Describes an experiment that illustrates the following points concerning the experimental determination of trypsin activity: (1) there is a difference in basing enzyme concentration on weight, absorbance, or active sites; and (2) the method of expressing enzyme concentration determines the value of specific, molecular, and catalytic center…