Introduces an experiment exhibiting blue and yellow-orange coloration in the plane of vibration of a vibrating string. Provides pictures and the experimental set-up. (YP)

Describes a physical organic experiment in thermodynamics and kinetics for undergraduate courses in organic chemistry, biochemistry, or physical chemistry. Details background information, solution preparations, equipment and methods, and the suggested experiments such as determination of general-base-catalytic coefficients and the Bronsted…

Introduces a construction method for a bubble made of polyurethane plastic and its applications in an ecology classroom. Provides the materials list, directions for bubble construction, and classroom activities. (YP)

Introduced is an inexpensive laboratory apparatus for first-year high school chemistry students. Presents information on materials, construction procedures, and activities for students. (YP)

Describes an experiment to be performed in an undergraduate biochemistry laboratory that is based on a gradient centrifugation system employing a simple bench top centrifuge, a freezer, and frozen surcose gradient solution to separate macromolecules and subcellular components. (CW)

Describes a kinetic and mechanistic investigation of ascorbic acid by a substitution-inert complex in acidic medium suitable for the undergraduate level. Discusses obtaining the second order rate constant for the rate determining step at a given temperature and comparison with the value predicted on the basis of the Marcus cross-relation. (CW)

Recounts the decision-making processes involved in the acquisition (or renovation) of a language laboratory for a small college. Of critical importance was the determination of how the laboratory would best be utilized as well as how it would operate. These decisions determined the best choice of equipment. (SL)

Explains that the speech compressor/expander is a piece of electronic equipment useful in second language learning laboratories. Considering the relationship between technology and its use as an aid in achieving fluency in comprehension, the theory of rate alteration in second language learning is supported as a viable tool to enhance any…

This study reports on the courses in biological sciences offered in public high schools, enrollments in the course in general biology, number of teachers of general biology, organization of the course, nature of the laboratory work, laboratory and supplementary facilities, the equipment used in teaching the course, appropriations for equipment and…

Faculty shortages, antiquated laboratory equipment, and precollege preparation have been identified as components on the engineering education crisis. An examination of these and other areas (including salaries and doctoral programs) indicates that it is absurd to ascribe crisis to the problems afflicting engineering education. (Author/JN)

Describes development of microcomputer-controlled gamma scintillation spectrometer and chromatographic data analyzer, including design and construction of interface electronics and production of software. Includes diagrams of electric circuits and project evaluation indicating that both instruments functioned as intended. (JN)

Focuses on attributes of microcomputer systems which affect their usefulness in a laboratory environment. In addition to presenting general concepts, comments are made regarding the implementation of these concepts using a microprocessor-based data acquisition system developed at the University of North Carolina. (CO)

Several experiments are described using common laboratory apparatus and readily available materials to generate resonance spectra of air columns. The advantages of this apparatus and method of demonstration are visual impact and accuracy of results. (CS)

Describes an application of solid-state memories in a laboratory course, which enables students to build electronic devices. Also introduces the fundamentals of analog-to-digital conversion and sampling theory. (CS)

Described is a diffusion apparatus to be used in an undergraduate physical chemistry laboratory experiment to determine the diffusion coefficients of aqueous solutions of sucrose and potassium dichromate. Included is the principle of the method, apparatus design and description, and experimental procedure. (Author/DS)