The 150th anniversary of the naming of the nucleus by Robert Brown in 1831 was commemorated by re-creating some of his most important observations using two of his microscopes. Comments on Brown's career and the microtechnique employed during his time are provided. (Author/JN)

Unfilled engineering faculty positions and obsolete laboratory equipment continue to threaten the quality of U.S. engineering education, but improvements are being made, according to a progress report issued as a followup to the National Engineering Action Conference held in April (1982). Highlights on the report are provided. (Author/JN)

Discusses the basics of scientific glassblowing, including equipment needed, lighting a hand torch (which uses a gas and oxygen mixture), and cutting tubing. Also discusses preparation of butt joints, tee joints, and bends. Photographs illustrating various techniques are provided. (JN)

Current and post World War II scientific research at the Los Alamos National Laboratory (New Mexico) is discussed. The operation of the laboratory, the Los Alamos consultant program, and continuation education, and continuing education activities at the laboratory are also discussed. (JN)

Describes contruction of an instrument which measures effects of reversible physiological changes on the motor coordination of laboratory animals. The "rotarod" is used to perform carefully planned, humane experiments which produce quantifiable results. A photograph and diagram of the apparatus are provided. (JN)

Describes several diagnostic tools used to determine specific problems of students referred to a writing lab, including structured interviews, protocols (asking a student to compose aloud for 15 to 20 minutes on a short topic), and back-pedaling (questioning what a student already knows about a given topic). (AEA)

Describes three experiments (also useful as demonstrations) using a "thorium cow," a device which concentrates the daughter products from thorium compounds by precipitation on a charged electrode. (JN)

A chromatographic procedure for analyzing organophosphorus pesticides (such as PCB's, nitrosamines, and phthalate esters) in orange juice is described, including a summary of the method, instrumentation, methodology, results/discussion, and calculations. (JN)

Provides information on collecting and maintaining termites and for using these insects in behavioral studies (trail following, recognition, food choice, reproductive behavior, and behavior in a magnetic field) and termite control experiments (preventive construction techniques, termite repellents, using soil or wood pretreatment, and the bait…

Describes a low-cost instrument using a solar cell as a sensor to measure both instantaneous and integrated value of solar flux. Constructing and calibrating such an instrument constitutes an undergraduate experimental project, affording students an opportunity to examine a variety of aspects associated with solar energy measurements. (Author/SK)

Describes the multimedia approach used in the electronics technology program at Southern Illinois University at Carbondale, which is based on self-paced learning modules and corresponding laboratory activities. Also examines the student evaluation method which looks at students' task performance on cognitive and psychomotor levels. (CAM)

Presents specific techniques for lectures and demonstrations in acoustics for deaf students. (SK)

Provides methods for making instruments and supplies accessible to the visually impaired student in the chemistry laboratory and classroom. (CS)

Theoretical background, experimental procedures, and analysis of experimental results are provided for an undergraduate physical chemistry experiment on electron paramagnetic resonance (EPR) linewidths. Source of line broadening observed in a spin-spin exchange process between radicals formed in aqueous solutions of potassium peroxylamine…

Three experiments examined the perception of a three-way voicing contrast by monolingual speakers of English. The results demonstrate that the perceptual mechanisms used by adults in categorizing stop consonants can be modified easily with simple laboratory techniques in a short period of time. (Author/PN)