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This study was undertaken to compare certain aspects of the colloidal behavior of ribonuclease treated bacterial cells with that of normal cells. Henry and Stacey (1943) and others have reported that ribonucleic acid plays an important role in gram staining. Many early investigators suggested that the electrical charge on the bacterial cell was an important(More)
Bacteriologists have used turbidimetric estimation of bacterial growth for many years. With the advent of the photoelectric and spectrophotometric methods, the precision of such measurements was improved. Gavin (1957) has discussed in detail certain fundamental considerations of the turbimetric method. In common with most growth measurements, final(More)
In recent physical-chemical studies of the bacterial cell little attention has been devoted to the effect of concentrated cell suspensions on the ability of the suspending medium to conduct an electric current. Oker-Blom (1912) reported that bacterial cells increased resistance. He concluded that the mass of the cells was sufficient to hinder the free(More)
JONES, D. L., AND KING, SYLVIA 1954 Evaluation of a single medium for detecting and production of urease and indol. Am. J. Clin. Pathol., 24, 1316-1317. KOHN, J. 1954 A two-tube technique for the identification of organisms of the Enterobacteriaceae group. J. Pathol. Bacteriol., 67, 286-288. KoVAC, N. 1928 Z. Imnnunitatsforsch., 55, 311, (cit: Difco Manual,(More)
Studies of the adsorption of acid dyes of the fluorane series have shown that more of the dye is adsorbed by bacteria under acid conditions than under basic or neutral conditions (Harris, 1949). The amount of dye adsorbed was also found to be related to the ionization of the dye molecule. Since both the bacterial cell and the dye anion carry negative(More)