Describes an undergraduate biochemistry experiment which involves the preparation and kinetics of an oxidation-reduction enzyme system, methemoglobin reductase. A crude enzyme extract is prepared and assayed spectrophotometrically. The enzyme system obeys Michaelis-Menton kinetics with respect to both substrate and the NADH cofactor. (MLH)

Describes an experiment that generates data for calculating the ratio of molecular separation in a gas to molecular diameter. (GS)

Discusses the nature of the proton in solution. Describes the acidity concept and the measurement of acidity functions in concentrated solutions of strong acids or basis. (BR)

I present modifications to the traditional course entitled, "Process dynamics and control," which I renamed "Modeling, dynamics, and control of chemical and biological processes." Additions include the central dogma of biology, pharmacokinetic systems, population balances, control of gene transcription, and large­-scale…

A reactor to convert waste rubber tires to useful products such as CO and H2, was investigated in a university undergraduate design project. The student worked individually with mentorship from a faculty professor who aided the student with professional critique. The student was able to research the background of the field and conceive of a novel…

This study focused on the cognitive conflicts experienced by young children in using software programs that provided them with tools to create and/or combine individual graphic elements into larger structures. Six 5-year-old children, none with prior computer experience, were observed using three programs--Kids at Work, Picture Perfect, and…

The 24 contributions to this volume were written by coaches, sport scientists, and medical authorities who surveyed recent research on biomechanics, physiology, psychology, nutrition, treatment of injuries, and training techniques for cyclists. There are four sections: (1) biomechanics and physiology; (2) research: techniques and results; (3)…

Dance has become a major force of expression among Hispanics in the United States serving the functions of ethnic unity, identity, and cultural expression. As a result, it is increasingly important to define and understand its development and history. This paper provides a universal definition of ethnic dance and a theoretical base upon which to…

Describes a technique for the projection of triple point demonstrations using apparatus constructed out of Lucite and an overhead projector. (GS)

Presents a philosophy of chemistry teaching and gives examples of how that philosophy is applied in the classroom. (GS)

Describes an investigation involving acid hydrolysis and using both volumetric and kinetic techniques. Presents examples of the determination of the rate constant and its variation with temperature. (GS)

Describes a model in which a steel ball bounces in synchronism with a vertically oscillating piston. The period of oscillation can be varied over a 3:1 range with the amplitude kept constant. As the period is increased, the ball bounces higher, contrary to the intuition of most observers. (Author/GS)