Chromium(VI) compounds are classified as oxidizers and must be specially packaged and transported for disposal while Cr(III) compounds are considered nonoxidizers. A process which reduces Cr(VI) to Cr(III) by adding sodium metabisulfite followed by neutralization with magnesium hydroxide is explored. (MVL)

Reviews the state-of-the-art in Macintosh microcomputers for the college-level physics laboratory. Discusses the availability of software and software development including programing languages and HyperCard. Describes application softwares including the area of simulations, data sampling and analysis, and instructional lessons. (YP)

Describes the Development and Promotion of Science and Technology Talents Project, Thailand's solution for meeting its country's need for scientists and technologists. Provides information on the six participating universities. Notes that the program includes secondary and higher education. (MVL)

Notes that Black, Hispanic, and American Indian enrollment in freshman engineering increased by more than 1400 students in 1988. (MVL)

Shows that the mutual repulsion that enables a superconductor to levitate a magnet and a magnet to levitate a superconductor can be combined into a single demonstration. Uses an overhead projector, two pellets of "1-2-3" superconductor, Nd-Fe-B magnets, liquid nitrogen, and paraffin. Offers superconductor preparation, hazards, and disposal…

Presents the construction aspects of a simple but reliable colorimeter made from locally available components. Notes the absorption range to be 400-750-nm. Lists seven experiments done on the instrument. (MVL)

Shows that two theories of stereochemistry were very different theories, grounded in different assumptions and were intended to explain different phenomena. Presents the original theories and later developments which caused a blending of the theories. (Author/MVL)

Discusses the phonetic module that increases the rate of information flow, establishes the parity between sender and receiver, and provides for the natural development of phonetic structures in the individual. Cites evidence and function of this specialization and architectural relations between the two classes of modules. (Author/RT)

The advantages and disadvantages of poster sessions vs. oral talks are reviewed. Front-end and secondary planning, materials, and follow-up needed for poster sessions are outlined. An example session and a check list are included. (Author/CW)

This article details some of the changes that have occurred in U.S. land-grant universities and colleges of agriculture, and the resulting issues and challenges facing faculty. Strategies for addressing these challenges are proposed. (Author/CW)

Presented is a successfully implemented active learning project and results of a survey to assess the success of the project. Materials and methods are discussed, and an example of one project is provided. (Author/CW)

Discusses computer simulations for chemistry courses. Reviews a simulation program, "Evaluation of Bonding Theory: The Werner Jorgensen Controversy," and provides information regarding hardware requirements for the program. Presents the idea of an expert system including simulation modules and counselor modules. Describes some chemical examples, a…

Discusses an undergraduate course for developing interest in and skills for research. Provides a course outline and briefly describes each part of the outline. (YP)

Discusses the flotation method for the determination of the density of solids. Provides the stepwise experimental procedure with typical data tables and graphs. (YP)

Discusses criteria for writing, designing, and selecting a physics text including topics covered, target students, diverse problems, and focused content. (YP)