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Factors affecting slime accumulation in fiberboard mill process water

Creator:: Minelli, Michael Philip
Abstract:: The objectives for this study were to determine the causes of slime formation in activated sludge treatment and to recommend possible control measures. The primary problem was a seasonal filamentous bulking which was caused by the mold, Geotrichum candidum. During the winter, mycelial fibers appeared and formed a free floating...
Resource Type:: Masters Thesis
Full Text:: approximately 7.0 allowed a well balanced, nonfilamentous, microbial population to predominate. Factors

Investigations of T cell costimulation and autoimmunity in mice, and development of flow cytometric methods to assess lymphocyte stimulation in dogs

Creator:: Weatherill, Amy R.
Abstract:: Proper immune function is indispensable, as failure to mount an immune response against a pathogen can lead to serious complications or even death. T cells act by enhancing the activation of phagocytic cells as well as the activation of B cells. Their widespread influence on an immune response makes optimal...
Resource Type:: Dissertation
Full Text:: Stimulation in Dogs. Abstract Approved: Jean A. Hall Proper immune function is indispensable, as failure to

Chitinase production of Arthrobacter sp. BN2

Creator:: Miranda-Chavez, Alcibiades Heli
Abstract:: A chitinase producing bacterium was isolated from soil and identified as a species of Arthrobacter. The organism grew well at temperatures between 27 and 33.5 C, and the chitinase production was highest at 25.5 C. As the temperature increased above the optimum point, the level of enzyme production rapidly decreased,...
Resource Type:: Masters Thesis
Full Text:: - fied as a species of Arthrobacter. The organism grew well at tempera- tures between 27 and 33.5 C, and

Serological detection of staphylococcal enterotoxin A in culture supernatants

Creator:: Nkanga, Enefiok James
Abstract:: A method has been presented for the observation of a large number of enterotoxin A producers. Production of a relatively concentrated toxin is achieved by the sac culture method. Further concentration, if needed, is carried out by PM-10 membrane ultrafiltration after centrifugation. The work is further improved by trypsinization of...
Resource Type:: Masters Thesis
Full Text:: height and the concentration of enterotoxin A applied to wells during Laurell electroimmunodiffusion

Rapid, sensitive methods for enumeration and enterotoxin assay for Staphylococcus aureus

Creator:: Chugg, Lee Russon
Abstract:: A selective, differential plating medium for the enumeration of coagulase-positive staphylococci was developed. The ingredients of this medium were analysed for their effect on normal, heat treated and frozen staphylococcal cells. The nutrient base consisted of 10 gm Tryptone, 5 gm Beef Extract, 1 gm Yeast Extract and 17 gm...
Resource Type:: Dissertation
Full Text:: - way between the two wells on a double diffusion slide test. After re- constituting they were stored

Improved detection methods and physiological studies of staphylococcal enterotoxin

Creator:: Kimble, Charles E.
Abstract:: The purpose of this study was to develop means to facilitate the detection of staphylococcal enterotoxin and to elucidate factors that influence enterotoxin formation. It was found that semipurification flat-gel electrophoresis in a water-cooled apparatus was more efficient than CM-cellulose and Sephadex column chromatography currently used to separate toxin from...
Resource Type:: Dissertation
Full Text:: precipitation midway be- tween the two wells. The reference toxins and antitoxins were kept in a refrigerator

Nitrite dissimilation by microorganisms incapable of efficient nitrate utilization : nutritional and ecological considerations

Creator:: Vangnai, Somsak
Resource Type:: Dissertation
Full Text:: . A"Ilein This study was undertaken to determine the nutritional require- ments and possible

Studies on the lipid and fatty acid composition of Micrococcus radiodurans

Creator:: Lewis, Norman Francis
Abstract:: Comparatively little work has been done on bacterial lipids. There are profound differences between bacterial lipids in general and lipids of the higher forms of life in such respects as the absence of sterols, phospholipids low in nitrogen but high in inositol and carbohydrate, the presence of large proportions of...
Resource Type:: Masters Thesis
Full Text:: this investigation was to characterize the fatty acids of Micrococcus radiodurans, a gram positive

Bacterial 16S ribosomal DNA analysis of pyrrolizidine alkaloid detoxifying enrichments from the ovine rumen

Creator:: Gray, Diane R.
Abstract:: Bacterial cultures enriched from sheep rumen fluid have demonstrated the ability to detoxify pyrrolizidine alkaloids (seneciphylline and jacobine) in tansy ragwort (Senecio jacobaea). The microbes are difficult to isolate using classical anaerobic techniques, therefore, microbes from two different enrichment cultures demonstrating similar degradation activity were identified using their 16S ribosomal...
Resource Type:: Masters Thesis
Full Text:: Analysis of Pyrrolizidine Alkaloid Detoxifying Enrichments from the Ovine Rumen Abstract approved: A

Structural analysis of thermally inactivated nisin

Creator:: Musafija-Jeknic, Tamara
Abstract:: Nisin, an antimicrobial peptide used in food preservation was evaluated for thermal stability. Nisin retained antimicrobial activity after having been heated at 121°C for seven hours. Anhydrous nisin and concentrated nisin solutions (5-10 mg/ml) were still active after having been heated up to 190°C or 230°C. When exposed to high...
Resource Type:: Masters Thesis
Full Text:: approved: Mark A. Daeschel Nisin, an antimicrobial peptide used in food preservation was evaluated

ScholarsArchive@OSU

Factors affecting slime accumulation in fiberboard mill process water

Investigations of T cell costimulation and autoimmunity in mice, and development of flow cytometric methods to assess lymphocyte stimulation in dogs

Chitinase production of Arthrobacter sp. BN2

Serological detection of staphylococcal enterotoxin A in culture supernatants

Rapid, sensitive methods for enumeration and enterotoxin assay for Staphylococcus aureus

Improved detection methods and physiological studies of staphylococcal enterotoxin

Nitrite dissimilation by microorganisms incapable of efficient nitrate utilization : nutritional and ecological considerations

Studies on the lipid and fatty acid composition of Micrococcus radiodurans

Bacterial 16S ribosomal DNA analysis of pyrrolizidine alkaloid detoxifying enrichments from the ovine rumen

Structural analysis of thermally inactivated nisin

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