Background information, procedures, and results are provided for an experiment in which students: (1) construct an immobilized penicillinase electrode; (2) evaluate electron response as a function of penicillin concentration; and (3) study effects of solvent compositions, ionic strength, and equilibrium time upon electrode response. (JN)

Background, procedures, and results are provided for an experiment which examines, through electron spin resonance spectroscopy, complex species formed by cupric and 2,6-dihydroxybenzoate ions in aqueous solutions. The experiment is illustrative of several aspects of inorganic and coordination chemistry, including the identification of species…

Outlines an approach for helping student teams assign roles to each participant for doing portions of the experiment and writing the report. Discusses teaching of technical report writing as outlined in the Style Manual of the American Institute of Physics. (MLH)

Provides a listing of all state guidelines and regulations pertaining to use of hypodermic syringes, eye safety, and animal care in biology and general science laboratories. (SL)

Describes an advanced undergraduate materials science course in which each student conducts two independent laboratory projects and is required to submit a formal lab report at the end of each project. (MLH)

Explains a scientific approach to accident prevention and outlines the safety aspects associated with the handling of chemicals in the secondary school. Provides a check list of unsafe acts and conditions, outlines features of good laboratory management, and gives hints for combating the effects of inflation on science budgets. (GS)

Explains the separation of the constituents of mixtures on one piece of chromatography paper. The example presented involves a vitamin C tablet, a disprin tablet, and a glucose tablet. Outlined are two methods for separating the constituents. (GS)

National Science Teachers Association (NSTA), led by a panel of K-12 science teachers, has developed a new position statement, "Responsible Use of Live Animals and Dissection in the Science Classroom." This statement examines the issues surrounding the integration of animals into the K-12 science curriculum and highlights key…

The advantages are related of a video recorder over a Polaroid camera for doing experiments dealing with the "conservation of mass and momentum." Use of video records is advocated for recording measurements in physics experiments. (JP)

Evaluates the arsenite-modified Jacobs-Hochheiser procedure for determining integrated nitrogen dioxide and nitrous oxide levels in the 1-15 pphm range in indoor and outdoor environments. (JR)

Worksheets utilize a paper geoboard to provide a variety of experiences with basic geometric concepts. (JP)

Briefly outlines the theoretical basis of the phenomenon of photoconductivity and describes a simple experiment which demonstrates the photoconductive properties of cadmium sulfide. (JR)