Discusses symmetry elements of molecules, symmetry operations, and point groups. Gives ten examples of assigning a point group to a molecule. (MLH)

Presented are the main features of lung histology as a source for biology teachers. Includes background material on the lung as well as labeled photographs and drawings. (BR)

Discusses various topics in color chemistry, including the electromagnetic spectrum, the absorption and reflection of light, additive and subtractive color mixing, and the molecular structure of simple colored substances. (MLH)

Describes the chemistry of dyeing, including acid, basic, vat, and disperse dyes. Includes laboratory experiments. (MLH)

Describes eleven laboratory experiments, including the catalytic effect of copper in zinc-acid reaction; a study of the rate of polymerization of some aldehydes; and a demonstration automatic potentiometric titrator. (MLH)

Suggests several mechanisms for catalysis by metal ion complexes. Discusses the principal factors of importance in these catalysis reactions and suggests reactions suitable for laboratory study. (MLH)

Ten ideas that have been tried out by the authors in schools are presented for biology teachers. The areas covered include genetics, dispersal of seeds, habituation in earthworms, respiration, sensory neurons, fats and oils. A reading list is provided. (PS)

Thirteen ideas are presented that may be of use to chemistry teachers. Topics covered include vitamin C, industrial chemistry, electrical conductivity, electrolysis, alkali metals, vibration modes infra-red, dynamic equilibrium, and some new demonstrations in gaseous combinations. (PS)

Describes the construction of an amplifier and force transducer that can be used to demonstrate electrical activity in nerve and muscle using the gastrocnemius muscle and sciatic nerve of the frog. (MLH)

Describes some recent advances in enzyme structure and action, including a description of enzyme-substrate interaction. Discusses the methods for determination of amino acid sequences in proteins; the actions of chymotrypsin, trypsin, and elastase; and details of the enzyme-substrate complex derived from kinetic studies and x-ray diffraction…