Describes an apparatus developed for photochemical studies, particularly those involving the fluorescence of halogenated acetones. The apparatus is constructed from equipment normally found in a moderately sized physical chemical laboratory. Also provides background information on some aspects of the photophysics of halogenated propanones. (JN)

The use of a microcomputer as the basis of a multichannel analyzer (MCA) system is described. Principles of microcomputer MCA, choice of microcomputer, input-output port, data display, MCA program, and interrupt routine (with flowchart) are the topic areas considered. (JN)

Equipped with simple sensors and software, a microcomputer can become a microcomputer-based laboratory (MBL). Discusses the value of MBL's and provides three programs which preview the new MBL kits available for science classes. A list of commercially available MBL's (with product names, current prices, and other information) is also included. (JN)

Describes the nature of gradient refractive index (GRIN) lenses, focusing on refraction in these materials, focal length of a thin Wood lens, and on manufacturing of such lenses. Indicates that GRIN lenses of small cross section are in limited production with applications suggested for optical communication and photocopying fields. (JN)

Highlights findings from National Science Foundation's National Survey of Academic Research Instruments and Instrumentation which examined the amount, condition, and cost of existing equipment systems for 1982 in computer sciences, physical sciences, and engineering. Indicates that one-fourth of the equipment is classified as obsolete by…

Discusses issues and problems related to the rapidly decaying research infrastructure and the improvement of research facilities and equipment. Although remedies to the problem vary, university spokesmen contend that the federal government's major role in funding educational facilities in the past leaves an obligation for assistance now and in the…

Describes the construction, design, and operation of an inexpensive, precision, multiple seed planter. (JN)

Offers suggestions and strategies related to integrating an instrumental approach in high school chemistry. Indicates that the problem-solving process is often clarified using the approach, that the approach improves the quality of the laboratory program, and that it is an effective technique for arousing student interest. (JN)

Outlined are photographic techniques for science instruction. Discussed are equipment, field photography, classroom photography, and aquarium photography. (SL)

Listed, with comments and descriptions, are the addresses of suppliers of crystal and molecular models. Included are United States and English suppliers. (SL)

Describes the design, construction, and performance of a low-cost, transversely excited molecular nitrogen laser. Suggests simple experiments and demonstrations using this laser. (MLH)

Discusses the characteristics of the Physics Activities Center established by the Kansas State University Department of Physics with the purpose of providing students the opportunities to "do their own thing". Included is a summary of its practical applications and a description of student reactions. (CC)