Analytical and experimental methods are used to determine the natural frequencies and mode shapes of Aluminum 6061-T651 beams with rectangular and circular cross-sections. A unique test stand is developed to provide the rectangular beam with different boundary conditions including clamped-free, clamped-clamped, clamped-pinned, and pinned-pinned.…

Compiled as an immediate source of reference and guidance, this manual was published by the Scottish Schools Science Equipment Research Centre to provide the following information about alphabetically listed chemicals considered to be hazardous: (1) the hazards; (2) incompatibility with other agents; (3) methods for handling, storage, disposal and…

An audio-tutorial approach that has been implemented at Indiana University in Bloomington focuses on student learning rather than the mechanism of teaching. The basic component of an audio-tutorial course is a taped presentation that acts as a tutor, guiding the students through a sequence of readings, filmstrips, diagrams, tables, and other…

In evaluating whether the laboratory guides for Project Physics and for PSSC are consistent with the goals of their designers in demonstrating the interplay between experiment and theory in the development of physics, a system was developed for analyzing physics laboratory investigations, and the laboratory activities in the "PSSC Physics…

GROWING COLLEGE ENROLLMENTS HAVE BEEN ACCOMPANIED BY SIMILAR INCREASES IN DEMAND FOR GENERAL CHEMISTRY, WITH RESULTANT PROBLEMS OF MAINTAINING QUALITY OF INSTRUCTION. THIS PAPER IS A DISCUSSION OF SOME WAYS OF MEETING THE PROBLEMS OF NUMBERS. MULTISECTION COURSES MAY BE ORGANIZED AROUND COMMON GENERAL OBJECTIVES OR AROUND COMMON CONTENT. AN…

The history of the use of laboratory work in teaching science is traced from the 18th century to the present laboratory-centered curricula. Major rationales and objectives for laboratory work are presented, and different types of laboratory activities are discussed from the standpoint of learning theories and research findings. Also discussed is…

Describes a simple thermodynamics experiment recommended for use in beginning chemical engineering laboratory courses. Outlines the theory behind the experiment, which determines the specific heat of a liquid. Discusses the construction, operation, and maintenance of the apparatus involved, along with the experimental procedure. (TW)

Describes the potential health hazards of using thioacetamide in introductory courses where students are involved in qualitative inorganic analysis. Describes the chemical as possessing carcinogenic, hepatotoxic, and mutagenic properties. Cautions that thioacetamide has caused various biochemical changes in the liver, and recommends limited uses…

Enumerates variables involved in the safe operation of a fume hood. Describes a test to measure hood performance. Discusses variables which effect hood performance. Lists design changes sometimes necessary to provide more space and encourage good practices. Concludes with a summary of good hood practices. (CW)

Presents an overview of biochemical education in China, including a description of the overall Chinese educational system. Summarizes workshop sessions which dealt with teaching objectives, teaching methods, self-instruction, and the education of graduate students (including the use of "dry" laboratory exercises and research…

Discusses the need for compliance with state and federal regulations regarding the handling of hazardous wastes in college chemistry laboratories. Addresses: (1) waste determination; (2) facility requirements; (3) use of the manifest, vendor, transporter, site selection requirements, and training; (4) contingency planning; and (5) documentation.…

Reports on a study which investigated the effects of having students analyze circuits in the laboratory compared with troubleshooting from homework problems. Results indicated that laboratory experiences provide a richer learning experience than lecture and homework alone. (TW)

Discusses the value of electrophoresis in the fields of protein chemistry and biochemistry. Describes how to build an inexpensive electrophoresis setup for use in either research or teaching activities. Details the construction of both the separating device and the power supply. (TW)

Describes the construction of a chemistry laboratory. Also discusses the place of science in school technology teaching, a study of students' understanding of simple quantitative relationships in chemistry, and the objectives of school physics. (JN)

Some of the issues surrounding the indoor air quality (IAQ) problems presented by science labs are discussed. Described are possible contaminants in labs, such as chemicals and biological organisms, and ways to lessen accidents arising from these sources are suggested. Some of the factors contributing to comfort, such as temperature levels, are…