Information concerning an undergraduate level experiment on the effects of surface forces is provided. (CP)

Describes the use of nuclear magnetic resonance (NMR) spectroscopy to study a three-component system and the technique by which to define a ternary phase diagram. (CP)

Presents four simple laboratory procedures for: preparation of organometallic compounds, a realistic qualitative organic analysis project, a computer program to plot potentiometric titration curves, and preparation of stereoscopic transparencies. (SL)

Describes an organic chemistry laboratory exercise which uses thermochromic compounds to study the thermodynamic effect of temperature on chemical equilbrium. (SL)

Suggests a series of science activities in botany for the elementary school classroom. Contains suggestions on the care and propagation of the coleus plant. (CP)

Describes a series of polarography experiments using commercially available pulse polarography instruments. (SL)

Provides demonstrations using digital display instruments of some of the mass and pH-related topics covered in first-year chemistry courses. (CP)

Explains the theory and laboratory construction procedures of a positive photoresist. (CP)

Describes a laboratory procedure which does not demand sophisticated equipment. (CP)

Reviews several schemes for organizing science laboratory objectives and activities and for analyzing several techniques designed to measure these laboratory outcomes. The need for further study and analysis of psychomotor behaviors in science education is emphasized. (HM)

Experimental procedures for studying enzyme activity using a Spectronic 20 spectrophotometer are described. The experiments demonstrate the effect of pH, temperature, and inhibitors on enzyme activity and allow the determination of Km, Vmax, and Kcat. These procedures are designed for teaching large lower-level biochemistry classes. (MR)

A quick, sensitive method which is adaptable for quantitating periodate consumption in a variety of undergraduate laboratory contexts is described. A laboratory procedure is also given that may be used for measurements of reaction rates as a function of temperature. (MR)

A laboratory experiment is described which illustrates such concepts as resonance, inductive, steric, and solvation effects in a beginning organic chemistry course. This experiment is designed to encourage students to predict results and interpret their findings. (MR)

In this section, brief contributed articles on a variety of secondary school science topics appear. (CP)

Describes a demonstration experiment illustrating rotation of grains process of metamorphic rock formation utilizing clear gelatin blocks. (SL)