Presents a recipe for the Nylon Rope Trick, which is considered to be one of the most spectacular demonstrations in chemistry. Materials for growing the polymer and some safety precautions are given. (SA)

Three methods are given for the synthesis of N-4 substituted sulfonamides. An example elucidates the procedures involved in one of the methods. The example is intended as a model for students. (SA)

Laboratory facilities make possible the audio- and videotaping of counseling as well as live observation, and with these aides the counselor educator can help counselor trainees significantly improve their counseling skills. Undermining the potential value and success of the laboratory practicum is the problem of counselee staffing. (Author)

The University of Denver's enrichment program for gifted and talented children enhances the university's public image, attracts potential students, and offers practicum students field work and research opportunities. (Author/MLF)

Describes an apparatus which allows one to study the speed distribution, the gravitational distribution, and the mean free path of steel balls agitated into two-dimensional motion through collisions with the moving walls of their enclosure. (Author/GA)

This experiment is suitable for illustrating synthesis-analysis and isopolyanion chemistry at the freshman level or at a more advanced level. (BB)

In this general chemistry experiment students calculate changes in free energy of formation of inorganic salts from the free energy of formation of ions. Then they test the conclusions of their calculations by mixing solutions of the ions. (BB)

Presents a laboratory experiment that was developed to acquaint physics students with field-effect transistor characteristics and circuits. Computer-drawn curves supplementing student laboratory exercises can be generated to provide more permanent, usable data than those taken from a curve tracer. (HM)

Presents brief notes on new ideas, equipment, techniques, or materials of interest to teachers of physics. An apparatus that demonstrates the uniform acceleration of gravity, and a simple way to demonstrate nuclear blocking patterns of crystal lattices are among new ideas presented. (HM)

Describes a laboratory demonstration that can be used to convert an analog quantity into frequency, which can then be converted into a binary measure using either an oscilloscope or a frequency counter. (MA)

Describes a study correlating observational test question scores and lab notebook evaluations. Results indicate that, while there is no correlation between those two factors, there are problems with evaluating notebooks objectively. (MA)

This is a college-level general chemistry experiment. (BB)

Suspensions of 20 different cultures were grown on appropriate media, then pipetted into sterile anhydrous silica gel. Silica gel cultures after incubation and refrigerated storage were tested for viability. Results showed little mutation, low replication, low contamination, minimal expenses, and survival up to two years. (CS)

Describes how student responses to 26 bipolar adjectives describing laboratory studies are used at a New Zealand university to modify the content of laboratory experiments in physics. (MLH)

Discusses the use of lap-dissolve projection to give students pre-laboratory instruction on an upcoming experiment. In this technique, two slide projectors are operated alternately so that one visual image fades away while the next appears on the same screen area. (MLH)