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  Partner: UNT Libraries
 Collection: UNT Theses and Dissertations
Isolation and Identification of Bacterial Species Associated with the Common House Fly and Three Species of Cockroaches

Isolation and Identification of Bacterial Species Associated with the Common House Fly and Three Species of Cockroaches

Date: 1951
Creator: Morland, Clifford L.
Description: In an attempt to demonstrate the role of insects as possible carriers of pathogenic bacterial organisms this investigation has been concerned with the determination of the microbial population associated both internally and externally with the common house fly and three species of the cockroach.
Contributing Partner: UNT Libraries
The Isolation and Identification of Micro-Organisms from Spoons of Public Eating Establishments in Denton, Texas

The Isolation and Identification of Micro-Organisms from Spoons of Public Eating Establishments in Denton, Texas

Date: 1949
Creator: Rugeley, Sarah Rose
Description: This investigation deals with the isolation and identification of bacteria found on selected samples of spoons in various eating establishments in the vicinity of Denton, Texas.
Contributing Partner: UNT Libraries
Isolation and Partial Characterization of a Bacterium Which Gives Off Filtrable Cells

Isolation and Partial Characterization of a Bacterium Which Gives Off Filtrable Cells

Date: May 1973
Creator: Siu, Henry H. W.
Description: The present study was on the isolation of a bacterium capable of producing filtrable forms which passed through the 0.45ยต filter membrane and regenerated the parental form; the testing of the true filtrability of the isolate; the relationship between growth of the isolate and appearance of filtrability; partial characterization of the isolate and visualization of the elements that passed through the membrane filter with electron microscopy and shadow casting technique.
Contributing Partner: UNT Libraries
Isolation and Partial Characterization of Carotenoid Pigments of Mycobacterium Rhodochrous

Isolation and Partial Characterization of Carotenoid Pigments of Mycobacterium Rhodochrous

Date: August 1971
Creator: Jorgensen, Joyce A.
Description: It was the purpose of this investigation to isolate and characterize the pigments of Mycobacterium rhodochrous by partition behavior, chromatographic data, and absorption spectra. In addition, it was the purpose to determine whether or not the type of pigments found in M. rhodochrous is typical of those found in other mycobacteria.
Contributing Partner: UNT Libraries
Isolation, Characterization and Physiological Studies of Cyanide-Utilizing Bacteria

Isolation, Characterization and Physiological Studies of Cyanide-Utilizing Bacteria

Date: December 1991
Creator: Silva Avalos, Juan G. (Juan Guillermo)
Description: Ten bacteria capable of growth on the metal-cyano complex, tetracyanonickelate (II) {K2 [Ni(CN)J } (TCN), supplied as the sole nitrogen source, were isolated. Seven isolates were identified as pseudomonads while the remaining three were classified as Klebsiella species. In addition to TCN, all isolates were able to utilize KCN although it was significantly more toxic. The degradation of TCN was most complete when supplied at growth-limiting concentrations, did not occur when ammonia was present, and resulted in the formation of nickel cyanide [Ni(CN)2] as a degradation product.
Contributing Partner: UNT Libraries
The Isolation, Cultivation and Testing of Organisms Anatagonistic to a Streptomycin Resistant Strain of Pseudomonas Aeruginosa

The Isolation, Cultivation and Testing of Organisms Anatagonistic to a Streptomycin Resistant Strain of Pseudomonas Aeruginosa

Date: 1951
Creator: Banister, Jack Warren
Description: The problem of finding an efficient antibiotic against Pseudomonas aeruginosa which can be used in the clinical treatment of genito-urinary tract infections resistant to treatment by streptomycin has not yet been solved. Therefore, this problem has consisted of first, the acquisition of possible inhibitors of the streptomycin resistant strain of Pseudomonas aeruginosa; second, the selection and identification of those which show a marked antagonism toward this organism; third, the determination of the antibiotic spectra of the inhibitors; fourth, the determination of whether the streptomycin resistant strain could also acquire a resistance to the antibiotic produced by its inhibitors; and last, an attempt to evaluate the therapeutic possibilities of the antibiotics demonstrated.
Contributing Partner: UNT Libraries
Isolation, Identification and Cultivation of Four Phytopathogenic Fungi

Isolation, Identification and Cultivation of Four Phytopathogenic Fungi

Date: 1951
Creator: Parks, Leroy W.
Description: This investigation includes a morphological and cultural study of four rather common pathogenic fungi one of which attacks Zinnia elegans, one Lagerstroemia indica, one Ligustrum lodense and one Euonymus japonica. The problem includes, first, a determination of the genera of these four fungi as revealed by their morphology in natural habitat; second, a determination of the growth and cultural characteristics of these on Cornmeal, Potato, Bean, Prune and Carrot agars; third, a comparison of the growth and cultural characteristics of these in natural habitat with the same on the various agars used; and fourth, an evaluation of the five artificial culture media in so far as their usage is concerned in the growth and cultivation of these four species of fungi.
Contributing Partner: UNT Libraries
Isolation of a  Pseudomonas aeruginosa Aspartate Transcarbamoylase Mutant and the Investigation of Its Growth Characteristics, Pyrimidine Biosynthetic Enzyme Activities, and Virulence Factor Production

Isolation of a Pseudomonas aeruginosa Aspartate Transcarbamoylase Mutant and the Investigation of Its Growth Characteristics, Pyrimidine Biosynthetic Enzyme Activities, and Virulence Factor Production

Date: December 2004
Creator: Hammerstein, Heidi Carol
Description: The pyrimidine biosynthetic pathway is an essential pathway for most organisms. Previous research on the pyrimidine pathway in Pseudomonas aeruginosa (PAO1) has shown that a block in the third step of the pathway resulted in both a requirement for exogenous pyrimidines and decreased ability to produce virulence factors. In this work an organism with a mutation in the second step of the pathway, aspartate transcarbamoylase (ATCase), was created. Assays for pyrimidine intermediates, and virulence factors were performed. Results showed that the production of pigments, haemolysin, and rhamnolipids were significantly decreased from PAO1. Elastase and casein protease production were also moderately decreased. In the Caenorhabditis elegans infection model the nematodes fed the ATCase mutant had increased mortality, as compared to nematodes fed wild type bacteria. These findings lend support to the hypothesis that changes in the pyrimidine biosynthetic pathway contribute to the organism's ability to effect pathogenicity.
Contributing Partner: UNT Libraries
The Isolation of GATB Aptitude Patterns for Six Major Fields of Study

The Isolation of GATB Aptitude Patterns for Six Major Fields of Study

Date: August 1965
Creator: Cullum, Felder Wilson
Description: The problem of this study was to isolate General Aptitude Test Battery patterns for persons who have succeeded in certain major fields of study at North Texas State University, Denton, Texas. In addition to the basic problem stated above, an effort was made to (1) determine the significance of the relationships between GATB scores and grade-point averages for all undergraduate courses taken; (2) determine the relationships between GATB scores and grade-point averages for all undergraduate courses in the major field of study, and (3) conduct a survey of all subjects selected for this study to determine their past, present and expected future fields of occupational endeavor since graduation from college and the relationship between such employment and the individual's major field of study in college.
Contributing Partner: UNT Libraries
Isolation, Purification, and Characterization of Aldolase from Human Heart

Isolation, Purification, and Characterization of Aldolase from Human Heart

Date: August 1972
Creator: Allen, Benja L.
Description: Aldolase from human heart has been purified 128-fold to a final specific activity of 11.52 units per mg. The purification procedure employed column chromatography on phosphocellulose.
Contributing Partner: UNT Libraries