Describes the process dynamics and control program developed by the chemical engineering department at the University of California, Santa Barbara. Undergraduate and graduate control courses and real-time computing courses are included. (HM)

Presents seven selected biology notes which could be used in the school biology courses. Each includes the name of the author and a description of activities suggested. (HM)

Describes a technique for the laboratory culture of Eucyclops agilis using Euglena. Details of the life cycle are given, and suggestions for its use in laboratory practicals, and in investigations with sixth-form (16 to 18 year-olds) and college students in the United Kingdom. (Author/HM)

Describes a laboratory demonstration in chemical equilibrium using ferric chloride and ammonium thiocyanate that would serve as a useful basis for an inquiry investigation. (BT)

Described is a base-friction modeling technique for studying the development of collapse structures in jointed rocks. A moving belt beneath weak material is designed to simulate gravity. A description is given of the model frame construction. (Author/SA)

Describes a teaching protocol that guides students toward connecting lab activities to the appropriate scientific concepts. Involves five steps: (1) reflective writing; (2) action; (3) dialog notes; (4) direct teaching; and (5) journal writing. (DDR)

Presents a version of the crush-the-can demonstration which is a hands-on activity in which students use an inexpensive, easily made holder for the can called Charlie's clamp. Includes some suggestions for the follow-up discussion. (DDR)

Describes the use of a simple process known as chromatography to separate and observe the color pigments in leaves, inks, and other materials. Provides some historical background and detailed procedures. (DDR)

Presents an activity that enables students to gain a better understanding of the importance of polymers. Students perform an experiment in which polymer chains of polyvinyl acetate form crosslinks. Includes background information and discussion questions. (DDR)

Described is a solar science activity designed to show students how light energy can be directed to produce visible chemical changes by making sunprints. Included are the materials, procedure, and safety considerations. (KR)

Described is a demonstration which involves the ingrowth of members of the radon-222 decay series. Laboratory procedures, equipment, analysis, and results are discussed. (CW)

Described is a simple and interesting chromatography experiment using three different fluorescence detection principles for the determination of caffeine, saccharin and sodium benzoate in beverages. Experimental procedures and an analysis and discussion of the results are included. (CW)

Presented are the procedures and a discussion of the results for an experiment in which students select unknown carboxylic acids, determine their melting points, and investigate their solubility behavior in water and ethanol. A table of selected carboxylic acids is included. (CW)

Described are some of the considerations necessary in planning a field studies course in the tropics. Discussed are site selection; planning and preparation; course structure; the advantages of travel courses; and recommendations concerning liability, multiple instructors, hotels, sailboats, and tours. A list of 26 references is included. (CW)

Considered is an experiment used to investigate one-dimensional, nonuniform acceleration. Presented is the correct expression for the acceleration, generalized to include friction and describe simulations supporting student data. The feasibility of the experiment is questioned. (CW)