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A Role of Intracellular Polysaccharide in the Sporulation of "Bacillus Cereus"
(Drake University, 1980-05)The problem. "Bacillus cereus" accumulates an intracellular polysaccharide under conditions of nutritional stress. The polysaccharide is then degraded as the organism begins sporulation. This study concerns intracellular ... -
Phenotypic Suppression of "Escherichia coli" K88ac antigen by selective media and termperature variations
(Drake University, 1980-09)The K88ac antigen, thought to he a pilus on "Escherichia coli", has been determined to be one of the virulence factors in neonatal porcine colibacillosis. Using five different "E. coli" strains, the suppression of this ... -
The Effect of Spermidine on the Rate of Sex-Linked Recessive Lethals Caused by X-Ray in Drosophila Melanogaster
(Drake University, 1984-05)The problem. Spermidine is a polyamine naturally occurring in many organisms including "Drosophila melanogaster". It has been shown to decrease the heat denaturation of DNA by binding to the DNA double helix. The agent ... -
An Intracellular Polysaccharide that Serves as a Carbon and Energy Source for Sporulation in "Bacillus Cereus" Strain T
(Drake University, 1984-04)The Problem. "Bacillus cereus" strain T accumulates an intracellular polysaccharide during late logarithmic and early stationary phases of the growth cycle. The polysaccharide is subsequently degraded during the ... -
Antigenic Relationship of Different Porcine Rotavirus Isolates and the Identification of a New Porcine Strain
(Drake University, 1983-08)The problem. Currently, only one strain of porcine rotavlrus has been reported. This strain, designated OSU, has been attenuated and is currently available as a federally licensed, live oral vaccine for pigs. This study ... -
Techniques for the Collection and Assay of Sleep Promotion Factor in Exercised and Sleep Deprived Dogs
(Drake University, 1981-05)The problem. The Pieron Phenomenon is the production of sleep in fully rested animals after a ventricular infusion of cerebrospinal fluid (CSF) from sleep deprived animals. According to the humoral theory of sleep, this ... -
The Effect of Occupancy on the Growth Rate of Tetrahymena Pyriformis in a Closed Biological System
(Drake University, 1964-05) -
The Effects of Microwave Radiation on the Infectivity of Trichinella Spiralis
(Drake University, 1984-07)The problem: The effects of microwave radiation on the infectivity of "Trichinella spiralis" in young, white, laboratory mice were studied. Procedure. Mice were divided into two groups: 1) mice receiving isolated, ...