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 demonstrations, using microprocessors, to show the slow change in relative phase of two sine waves feeding the inputs of an oscilloscope and Fourier synthesis. (SK)

Recommendations are made for handling and growth of Beneckea natriegens, a rapidly growing, nonpathogenic marine bacterium which can be used with advantage to replace Escherichia coli in many undergraduate microbiology experiments. Examples of experiments and the potential value of this organism as a subject for student research projects are…

Describes an undergraduate physical chemistry experiment which demonstrates the principles of solution calorimetry and the entropy titration technique. (CS)

Presents three problems that can be used in classroom to motivate chemical engineering students at the college level. (HM)

Describes a simple demonstration that illustrates the nature of isotropic substances by tearing newsprint, magazines, and wrapping paper. (BT)