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)

Describes a laboratory pretest giving samples of laboratory competencies, such as observing, interpreting, and calculating. Information from the test is related to student background and to overall success in the course. A test copy and tabulated data are included. (EB)

Describes a positive approach toward open-admissions policy taken by a new department in Interdisciplinary Science. The program is built on the strengths of its students and focuses on scientific problems of current importance that can be used to sharpen the student's analytical abilities and develop basic skills and concepts. (Author/EB)

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)

Describes an organic chemistry course designed as a modification of the Keller plan; lists the basic assumptions of the course design; outlines how the course was conducted; and compares the grade distribution to that of a traditional class. (GS)

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 a synthesis laboratory that is a two-semester sequence for students who have had general chemistry as well as prior or concurrent experience with organic chemistry. Outlines the compounds synthesized, techniques used, and possible special projects. (GS)

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

Describes a way of teaching science designed to stimulate interest among non-science majors to help make science a more meaningful subject to them. Attention is focused on the study of a particular type of air pollution and on the use of the discipline of art to examine the effects of this pollution. (EB)

Describes a model system to illustrate many of the biochemical and chromosomal processes involved in the transmission of genetic material. Uses commercially available beads. (BR)

Describes two exercises which use data of sporting events (running) in conjunction with biological factors as exercises in interpreting data. (BR)

Describes construction and use of a simple auxanometer which students can use to accurately measure root growth rates of intact seedlings. Typical time course data are presented for the effect of ethylene and indole acetic acid on pea root growth. (Author/BR)