Gives evidence for hydration effects as the cause of the dependence of DNA's buoyant density on the percent composition of its guanine and cytosine bases. (MLH)

Describes a solid waste chemistry course that incorporates environmental chemistry principles, an introduction to industrial chemistry, and some engineering concepts. (MLH)

Describes an undergraduate chemistry colloquium that provides in-depth training in literature research techniques and experience in technical communication. (MLH)

Discusses the preparation of a solution of assigned molarity as a suitable test of laboratory technique for nonscience majors. (MLH)

Briefly describes eleven standardized exams, covering both college and secondary levels, that have been released by the Examinations Committee of the American Chemistry Society. Also announces new graduate level placement exams in analytical, organic, and physical chemistry. (MLH)

Describes an experiment that utilizes advanced techniques for analyzing complicated nmr spectra that are not first-order. (MLH)

Describes how to build and calibrate an apparatus utilizing modern circuitry that quickly and accurately measures dipole moments. (MLH)

Describes an experiment that utilizes fluorescence intensity measurements from a Spectronic 20 to determine the rate constant for the fluorescence quenching of various aromatic hydrocarbons by carbon tetrachloride in an ethanol solvent. (MLH)

Describes a study of the kinetics of the recombination of nitrogen atoms in which concentration-time relations are determined directly by utilizing visual observations of emissions to make gas phase titrations of N atoms with NO. (MLH)

Describes a new sodium fusion procedure and a new single reagent test for nitrogen and sulfur for use in the analytical lab. (MLH)

Describes a classification test that uses a sodium nitroprusside reagent to identify aliphatic and aryl amines. (MLH)

Describes an experiment for an honors organic laboratory course that allows the student to approach a synthesis with independent planning and the use of the literature. (MLH)

Describes an experiment designed to confirm that newly purchased commercial orange juice contains sufficient ascorbic acid to meet government standards, and to establish the rate of aerial oxidation of this ascorbic acid when the juice is stored in a refrigerator. (MLH)

Describes an inexpensive apparatus for packing liquid and gas chromatographic columns of high efficiency. Consists of stainless steel support struts, an Automat Getriebmotor, and an associated three-pulley system capable of 10, 30, and 300 rpm. (MLH)

Describes various ways to arrange equipment and utilities in chemical laboratories for both research and teaching purposes. (MLH)