Describes the use of biofeedback machines in biology classes which provide students with an awareness of their own brain waves and as a device to demonstrate the fact that the body responds readily to the mind. (BR)

Describes an experiment wherein the student can demonstrate the existence of all the thiocyanato chromium complexes, estimate the stepwise formation constants, demonstrate the robustness of chromium III complexes, and show the principles of paper electrophoresis. (GS)

Describes an experiment that will acquaint the student with the ion-exchange model, yield data which fit nicely to a computer type analysis, introduce the preparation of electrodes, provide a unique experience with elevated temperatures and ionic solvents, and provide experience in electrometric measurements. (GS)

Describes an experiment that illustrates the use of the preparative ultracentrifuge in isolating and purifying bacterial ribosomes, determines the sedimentation coefficients of the ribonucleoprotein particles, and demonstrates the subunit structure of the 70-S ribosome and the role of the magnesium ion in the association of subunits. (Author/GS)

Describes a laboratory experiment designed to merge the concepts and techniques of the analytical-organic-physical subdivisions and introduce the student to a decision-making situation. Presents a discussion of the use of the experiment in attaining these goals and provides typical data obtained by students. (GS)

Reports a modification of a simple method previously described for determining enthalpies of sublimation and comments on some of the method's inherent limitations. (Author/GS)

Presents a description of the development of a laboratory-oriented chemistry course and the results noticed when the course was implemented. The syllabus was considered to be highly successful. (EB)

The program objectives are to instruct students in laboratory techniques, experimental procedures, evaluation of results, and laboratory project design. Integration of techniques which may span several areas of chemistry is emphasized in the solution of problems. Current course content of the program is listed. (GS)

Describes an experiment designed for second-level summer school chemistry students enrolled in Great Britain's Open University. (GS)

Suggests current scientific literature published in journals of biological research as a source of new, interesting, and enlightened experiments to reinforce an understanding of the process and sense of science. Presents an exercise developed using current literature. (EB)

Presents an alternative series of investigations replacing the propanone-trichloromethane system (Topic 10) in the Nuffield A-Level course. A trichloromethane-ethyl ethanoate (acetate) system presented in four experiments give good results and removed the dangers arising from the other system. Topic 10 need not be re-written, just the replacement…

Describes an approach which begins with observations and systems familiar to the student and proceeds to develop and test models to explain them. Experimental topics include Brownian motion, a germinating cell, phase change of p-dichlorobenzene, extension and contraction of rubber, and an enzyme system. (GS)