Describes structure, use, analysis, and toxicological properties of polychlorinated biphenyls. Provides data on occurrence and biological magnification in ecosystems. Significance, and synergistic relationships with DDT summarized. (AL)

Describes a method to compare diffusion rates of selected amines to that of HCl. Provides an opportunity to introduce simple organic compounds early in the general chemistry curriculum and can be used to test Graham's Law for several different molar masses. (JRH)

Reported are a literature survey and laboratory data which investigate modified coagulation as a method for organics removal in water and wastewater treatment. (CS)

This article discusses the current state of the art of organics removal by adsorption. Various theoretical explanations of the adsorption process are given, along with practical results from laboratory, pilot-scale, and full-scale applications. (CS)

Reviewed are a number of factors important in the formation of trihalomethanes (THM) including the nature of aquatic humus and the influences of preozonation, bromide, pH, and chlorine. A brief investigation is also conducted into the kinetics of the THM reaction. Several major research needs are represented. (CS)

Described is a modified Fehling test and a modified corrected Benedict test. (RH)

Discusses the use of the mixture of a carboxylic acid and sodium borohydride as a reagent. The chemical mechanism of the mixture is described using structural formulas. Lists 15 references. (YP)