Although a complete oxygen meter is an expensive piece of equipment, homemade circuitry can be a suitable substitute if science teachers are aware of the limitations of the apparatus as well as of certain techniques for effective use. (PB)

Describes procedures for measuring the reverberation time in rooms which have been used for classroom demonstrations, and by nonscience students taking a course in musical acoustics. (Author/CS)

This collection of notes describes (1) an optoelectronic apparatus for classroom demonstrations of mechanical laws, (2) a more efficient method for demonstrated nuclear chain reactions using electrically energized "traps" and ping-pong balls, and (3) an inexpensive demonstration for qualitative analysis of temperature-dependent resistance. (CS)

Discusses how drama can play a vital role in the science classroom. Guidelines and criteria for the evaluation of the use of drama in science teaching are also presented. (HM)

Discusses a method to solve problems in stoichiometry which can also be applied to other problems involving relationships between constituents in a chemical reaction. Students with little prior knowledge of chemistry can successfully use the method. (Author/SK)

Describes ways in which a stationary mirror ball can be used to demonstrate X-ray diffraction in an undergraduate general chemistry course. (CS)

Provides information for performing demonstrations on the synthesis and decomposition of zinc iodide and on the preparation and properties of polybutadiene (jumping rubber). (CS)

Describes some practical exercises involving the glutamine synthetase enzyme of Beneckea Natriegens. (CS)

Presents the following three biology notes: (1) a low cost variable temperature incubator; (2) projects on the ecology of freshwater mussels (Unionidae); and (3) studies on urease. (HM)

Presents 12 chemistry notes for British secondary school teachers. Some of these notes are: (1) a simple device for testing pH-meters; (2) portable fume cupboard safety screen; and (3) Mass spectroscopy-analysis of a mass peak. (HM)

Presents six middle school science notes for British science teachers. Some of these notes are: (1) fingerprints; (2) the floating magnet; and (3) the production of electricity using a lemon. (HM)

Presents an NMR experiment for the undergraduate organic laboratory, based on the disproportionation reaction of the mixed azine of benzaldehyde and acetophenone. (CS)

Describes a biochemistry class project which allows students to investigate independently the separate aspects of a common complex problem. The basic experimental procedure is detailed for obtaining information about the structure and geometry of L-ornithine carbamoyltransferase. (CS)

Presents materials and procedures for a lecture demonstration in which liquid nitrogen or liquid oxygen is poured between the poles of a powerful magnet. Hazards of these procedures are included in the discussion. (CS)

Describes a two-part energy unit for gifted fifth and sixth graders. Students conduct energy use/waste surveys and participate in a simulation game concerning a particular environmental/energy problem. (SJL)