Presents a research project for secondary school students in the fields of archaeophysics (archaeology) and geophysics using gamma spectroscopy. Describes investigations in mineralization and in dating of potsherds. (LS)

After introducing computer terminology, the author states the purpose of a 3-week intensive summer course to afford practicing scientists familiarity with digital computers in chemical instrumentation. Describes equipment and personnel required. The course consists of fourteen formal lectures and fourteen laboratory assignments in digital logic,…

The use of toluidine blue as a stain for plant tissues is advocated. Directions for hand-cut tissue staining are provided. (PEB)

The temperature at which the onset of coordinated segmental motion begins is called the glass-rubber transition temperature (Tg). Natural rubber at room temperature is a good example of a material above its Tg. Describes an experiment examining the response of a typical polymer to temperature variations above and below Tg. (Author/JN)

Cerenkov counting is a useful technique for assaying medium/high energy beta emitters in aqueous solutions. Advantages of the technique include: (1) simple sample preparation; (2) being able to handle large volume of aqueous solution for counting; and (3) absence of chemical quenching. Cerenkov counting is also less expensive than other methods.…

Describes procedures for preparing acetylacetonate complex of cobalt(II), followed by spectrophotometric analysis to characterize the material, with additional characterization methods supplied by students to provide open-ended dimension for the experiment. (SK)

Measurement of the time dependence of the flow of charge constitutes the procedure known as chronocoulometry. Although the technique is useful in a variety of electrochemical measurements, the discussion focuses on the evaluation of reactant adsorption, the application for which the technique was originally devised. (JN)

Discusses the nature of pulse voltammetry, indicating that its widespread use arises from good sensitivity and detection limits and from ease of application and low cost. Provides analytical and mechanistic applications of the procedure. (JN)