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Enterotoxin-positive (Ent+) and enterotoxin-negative (Ent-) strains of Clostridium perfringens were cultured in Duncan-Strong sporulation medium containing starch at 37 and 46 degrees C. At 37 degrees C, all strains degraded starch and sporulated well. However, only Ent- strains could hydrolyze starch, grow extensively, and sporulate at 46 degrees C. Growth, sporulation, and starch hydrolysis b...

DUNCAN (1959) described a method for determining halothane in tissues, body fluids and gases, based on the liberation of chloride and bromide ions by the action of an ethereal solution of lithium aluminium hydride. The reagent is somewhat troublesome to prepare and can only be kept under conditions which rigidly exclude moisture. Some workers have experienced difficulties in obtaining anhydrous...

School of Management, Northwestern University (e-mail: eric-anderson@ northwestern.edu). Nathan M. Fong is a doctoral student (e-mail: nfong@ sloan.mit.edu), Duncan I. Simester is NTU Professor of Management Science (e-mail: [email protected]), and Catherine E. Tucker is Douglas Drane Career Development Professor in IT and Management and Assistant Professor of Marketing (e-mail: [email protected]...

In this chapter the fundamental aspects involved in biological treatment processes applied for the removal of nitrogen from wastewaters are described. A comprehensive review of the literature is provided including kinetic, microbiological and biochemical aspects of nitrification, denitrification and anammox, as well as key operational parameters affecting the processes. This information is rele...