Experimental procedures, typical observations, and results for the simultaneous analysis of Fe(III) and Cu(II) in a solution are discussed. The method is based on selective interaction between the two ions and potassium hexacyanoruthenate(II) in acid solution involving no preliminary sample preparations. (Author/JN)

A simple, three-step procedure for synthesizing a dipeptide from its component amino acids is described. The dipeptide synthesized uses inexpensive amino acids having hydrocarbon side-chains and can be observed in E/Z forms by nuclear magnetic resonance spectroscopy. Each step in the synthesis produces white crystalline products using standard…

Describes a project and experimental procedures, suitable for a final year organic chemistry course, in which students synthesize a variety of substituted phenanthrenes, chrysenes, and benzo phenanthrenes. (SK)

Describes a simple, inexpensive experiment for extraction of synthetic dyes permitted in foodstuffs, and their separation and identification using thin-layer chromatography and ultraviolet/visible spectroscopy. (Author/SK)

A set of ions is selected (by computer program available from author) for each student in this qualitative analysis course. Students work out a separation scheme based on results of their experimentation and using selected references. Course methodology, preparation of solutions/unknowns, grading, and student responses are discussed. (Author/SK)

Describes several undergraduate deuteriation experiments using deuterium oxide as the source of label, including general and specific procedures. (SK)

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)

The use of simple diagrams for instruction of first-year operative dental students is encouraged. A series of illustrations for Class I preparation of cavities, focusing on walls, line angles and point angles, is presented and its use described. (MSE)

A laboratory experiment that demonstrates the effects of various dental materials on a representative enzyme from the pulp is outlined. The experiment encourages students to consider the effects that various restorative materials and techniques might have on enzymes in the living pulp. (Author/MLW)

Provides a systematic presentation of methods of standard addition in instrumental analysis in spectrophotometry, atomic absorption, and electrochemistry. (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)

Discusses the physiology of endogenous pyrogen (EP), the fever-producing factor of cellular origin. Included are: its hormone-like role, its molecular nature, bioassay procedures, cellular production and mechanisms of EP action. (SA)