Inaug.-diss.--Erlangen. / Lebenslauf. "Verzeichnis der benützten litteratur": p. [67]-68.

In order to determine the source of bacteria in Tillamook Bay, Oregon, water samples were collected monthly for six months during the rainy season from October 1975 through March 1976 from the bay and its tributaries, the Kilchis, Trask, Tillamook, and Wilson Rivers. Fecal coliform levels of these samples were determined and the 1,917 bacteria isolated were tested for their resistance patterns to chloramphenicol (Cm), streptomycin (Sm), ampicillin (Am), tetracycline (Tc), chlortetracycline (Ct), oxytetracycline (Ot), neomycin (Nm), nitrofurazone (Ni), nalidixic acid (Na), sulfathiazole (Su), kanamycin (Km), and procaine penicillin G (Pe). The fecal coliform count per 100 ml of bay water ranged from 3.6 to 42.0. The counts for Tillamook River ranged from 13.5 to 112.0, Trask River from 0.0 to 132.0, Wilson River from 8.5 to 105.0, and Kilchis River from 0.5 to 13.9. The rise and fall of fecal coliform levels were characteristic of the sampling date and each sampling station showed its characteristic maximum and minimum levels. The 1,917 fecal coliform isolates showed 176 different resistance patterns to the 12 antibiotics tested. None of the patterns, however, was characteristic of any specific sampling site. The fecal coliform counts of the bay were statistically compared to 135 independent variables that included the fecal coliform counts of tributaries, temperature, river flow data, tide information, antibiotic use data, and the antibiotic resistance patterns. Bay fecal coliform levels were highly correlated with the fecal coliform counts of tributaries especially those of the Trask and Wilson Rivers, degree of resistance to antibiotics, recreational activities, and precipitation. Negative correlation existed between bay fecal coliform count and the ambient temperature. two potentially useful linear regression models to predict bay fecal coliform level were developed using a computerized stepwise multiple linear regression program. / Graduation date: 1977

Thesis (M.Sc.)--College of William and Mary. / Includes bibliographical references.

M.S. / Physiology / There has been a controversy among both clinicians and physiologists for a long time concerning the effects of various toxins on the thyroid gland. / The first sentence serves as the abstract for this thesis. The poor quality of the text is due to the onion skin paper the thesis was scanned from.

M.S. / Physiology / There is no abstract to this thesis. The thesis does not list department or major so it is only a guess that the thesis was awarded in physiology. The poor text quality is due to the onion skin paper the thesis was scanned from.

Thesis University of Michigan. / "Literature cited": p. [56]-58.

Thesis (Ph. D.)--College of William and Mary. / Typescript. Vita. Includes bibliographical references. Also available via the World Wide Web.

Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 204-213). Also available via the Internet.

Thesis University of Michigan. / "Literature cited": p. [56]-58.

The need to develop a renewable, environmentally friendly source of energy has become a primary focus in modern science, with bio gas showing considerable potential. Interest in the methanogenic Archaea has therefore grown in recent years and extensive studies have been carried out to investigate the population diversity in various habitats. Presently, there are only a few studies that have evaluated the microbial communities inhabiting the gastrointestinal tract of wildlife native to southern Africa. This study aimed to investigate the microbial diversity, in particular the bacterial and methanogen communities involved in fermentative digestion in the gastrointestinal tract of zebra. Assessment of the microbial diversity in zebra faeces included both culture-based techniques and nucleic acid targeting analysis via 16S rRNA gene sequencing. Quantitative analysis using selected solid media revealed high counts for aerobic and anaerobic Bacteria (7.51x108 and 2.45x109/gram of faecal sample respectively). The majority of aerobic colonies that were detected exhibited Bacillus-like morphology. Nucleic acid based analysis of the diversity of both Bacteria and methanogenic Archaea in zebra faecal material was performed. Both manual and kit based extractions were used for DNA isolation in order to compare the efficiency of the two methods. Results show that a vigorous mechanical treatment was best for the release of DNA from the faecal matter. Amplification of target gene regions was carried out using established primer pairs (ARCH69F/ARCH915R and EUB338F/EUB907R) for methanogen and bacterial DNA respectively. Amplified 16S rRNA gene regions were cloned into a high copy number vector and random clones were selected for evaluation. Clones containing the target gene were further analysed by ARDRA and were assigned to a specific phylotype. Two bacterial (105 clones in total) and three methanogen (178 clones in total) clone libraries were constructed, of which 24 phylotypes were established for Bacteria and 25 for methanogenic Archaea. A representative of each phylotype was analysed by sequencing and further phylogenetic analysis was conducted. Six bacterial phylotypes, which represented 56% of all bacterial clones, exhibited 99% sequence similarity to Bacillus species. Six methanogen phylotypes, which exhibited 99% sequence similarity to the hydrogenotrophic species Methanobrevibacter gottschalkii strain PG, were established to be predominant in zebra faeces. These phylotypes represented 71% of all archaeal clones selected for analysis in this study. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2013.