Provided are directions for culturing bacteria by using yoghurt as a culture medium. Yoghurt is a safe medium and results in an end product which may be eaten if desired. (PB)

Presents a science project involving the production, transportation, handling and preparation of food for human consumption. Calculations of caloric value of the food intake and the energy costs of cooking are included. (Author/SA)

Describes a variation of the familiar laboratory investigation on the spring and mass oscillator. (SK)

The acid-catalyzed hydrolysis of N-vinyl pyrrolidone provides a simple spectrophotometric kinetic experiment to introduce general acid catalysis, solvent isotope effects, and other aspects of ionic reactions in solution in advanced courses. The Bronsted equation and concept of linear free-energy changes is also covered. (SK)

Describes an interdisciplinary student experiment based upon the radiation effects on polymers, integrating some of the fundamentals of radiation chemistry, polymer chemistry, and material science. Also demonstrates how the information gained in the experiment has direct commercial application in product manufacture or processing. (CS)

Describes a simple demonstration that shows the change in molecular density and the reduction in pressure of air in a centrifugal field. Uses two circular disks with the same radius and rotating with the same angular velocity, in loose mutual contact, around their symmetry axis. (GA)

Describes the structure of a laboratory that integrates material introduced in the various disciplines including microbiology, pathology, and histology. (MA)

Describes a one-year experiment in self-directed learning for intermediate English students at the School of Mining Engineering of Nancy (France). Analyzes students' responses to a questionnaire and teachers' observations in an attempt to evaluate the effectiveness of this approach as compared to traditional second language courses. (MES)

Argues for a dual approach to the study of second language acquisition, incorporating a nomothetic and a hermeneutic mode of inquiry. (Author/AM)

It is desirable that the undergraduate pharmacy student gain some experience in the collection and mathematical treatment of pharmacokinetic data. An experiment to provide the student with data for obtaining pharmacokinetic parameters is described, including lists of materials and equipment, with a student consent form appended. (MLW)

Described is a demonstration utilized to measure the heat of vaporization using the Clausius-Clapeyron equation. Explained is that when measurement is made as part of a demonstration, it raises student's consciousness that chemistry is experimentally based. (Author/DS)

Provides procedures, apparatus, and pre- and postlaboratory questions for an inexpensive, unsophosticated experiment that determines the approximate value for Avogadro's number. (CS)

A science and social studies unit developed around rosin is described. Students develop an understanding of the processing of raw material from a plant source into a commercial product and how to protect wood from weathering by preparing, testing, and evaluating varnish and shellac for their wood protective qualities. (Author/DS)

Discusses distillation of liquid mixtures with the emphasis on experimental work. A number of experiments, intended for chemistry secondary school teachers in the United Kingdom, are included. (HM)

Describes an experiment which makes use of a number of concepts from geometrical optics. The apparatus and method which is intended for students in elementary college physics classes are included. (HM)