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R-Plasmid Transfer To And From Escherichia Coli Strains Isolated From Human Fecal Samples, T. L. Corliss, Paul S. Cohen, Victor J. Cabelli

Past Departments Faculty Publications (CELS)

Strains of Escherichia coli recently isolated from human feces were examined for the frequency with which they accept an R factor (R1) from a derepressed fi⁺ strain of E. coli K-12 and transfer it to fecal and laboratory strains. Colicins produced by some of the isolates rapidly killed the other half of the mating pair; therefore, conjugation was conducted by a membrane filtration procedure whereby this effect was minimized. The majority of fecal E. coli isolates accepted the R factor at lower frequencies than K-12 F⁻, varying from 10⁻² per donor cell to undetectable levels. The …

Renaissance 1981, University Of Rhode Island

URI Yearbooks

This is a digitized, downloadable version of the University of Rhode Island yearbook.

Promotion Of Distant-Water Fishing Industry In Taiwan, Dah-Wen Shieh

Marine Affairs Theses and Major Papers

The growth of distant-water fishing industry in Taiwan has been steady during the period from 1965-1973. However, since 1973, the slow expansion of distant-water fisheries has been reflected in both the production side and the decreasing catch per unit effort. The increasing operation costs and the shrinking fishing grounds are mainly attributable to the limitation of distant-water fishing industry. The small scale of fishing companies with small-sized vessels also resulted in the inefficient operation in this highly competitive business. For Taiwan, distant-water fishing is not only a means of meeting general protein requirements for its population but also an important …

Trace Metal Pollution In Narragansett Bay: A Case Study Of The Rhode Island Quahog Fishery, Scott W. Horsley

Marine Affairs Theses and Major Papers

This paper was written with two objectives in mind: to provide information relevant to the protection of the quahog fishery and the protection of human health. Both are threatened as hundreds of millions of gallons of industrial effluents and sewage treatment plant discharges enter Narragansett Bay daily. The implications of trace metal pollution with respect to the quahog fishery have received little attention to date. The purpose of this paper is to assemble scientific, legal, and socioeconomic information in a fashion which will direct future research and management attempts in an effective manner.

Protein Isolates And Enzymatically Modified Proteins From The Frame Portion Of Solid Fish Waste, Joseph Montecalvo Jr.

Open Access Dissertations

No abstract provided.

Quantum Spin Chains, Jill C. Bonner, H. W. Blöte, Hans Beck, Gerhard Müller

Physics Faculty Publications

Serious scientific interest in one-dimensional (1-D) physics arose in the early 1960’s. This interest was stimulated by exact as well as accurate numerical solutions to a variety of quantum spin chain problems [1]. The potential relevance of such solutions to real experimental systems was first demonstrated by Griffiths [2] in conjunction with workers at the Kamerlingh Onnes Laboratorium, Leiden. Theory and experiment were shown to be in excellent agreement for a naturally quasi-1-D Heisenberg spin 1/2 antiferromagnet, copper tetrammine sulphate [Cu(NH₃)₄SO₄·H₂O]. Further stimulus to the new field of quasi-1-D magnetism was provided …

Relative Colonization Potentials Of Normal And Genetically-Altered Escherichia Coli K12 And Human Fecal Strains In Mice: Surface Properties, Plasmids And Chromosomal Genes, Mary Lynn Myhal

Open Access Dissertations

No abstract provided.

Quantitative Method For Enumeration Of Enterotoxigenic Escherichia Coli., Rebecca L. Calderon, Morris A. Levin

Civil & Environmental Engineering Faculty Publications

A rapid method was developed to quantify toxigenic Escherichia coli, using a membrane filter procedure. After filtration of samples, the membrane filter was first incubated on a medium selective for E. coli (24 h, 44° C) and then transferred to tryptic soy agar (3%; 6 h, 37° C). To assay for labile toxin-producing colonies, the filter was then transferred to a monolayer of Y-1 cells, the E. coli colonies were marked on the bottom of the petri dish, and the filter was removed after 15 min. The monolayer was observed for a positive rounding effect after a 15- to …

Temporal Characteristics Of Humpback Whale (Megaptera Novaeangliae) Songs, Thomas Joseph Thompson

Open Access Dissertations

No abstract provided.

Uri Undergraduate Course Catalog 1981-1982, University Of Rhode Island

URI Course Catalogs Archive

This is a digitized, downloadable version of the University of Rhode Island course catalog.

Uri Graduate School Course Catalog 1981-1982, University Of Rhode Island

URI Course Catalogs Archive

This is a digitized, downloadable version of the University of Rhode Island course catalog.

Evaluation Of The Nutritional And Toxicological Effects Of Maillard Browned Proteins In The Rat, Stephen Joseph Pintauro

Open Access Dissertations

No abstract provided.

Serum Neuroleptics, Psychiatric Status, And Neurological Side Effects: A Radio-Receptor Assay Investigation In Acutely Psychotic Inpatients, Longin Thomas Kucharski

Open Access Dissertations

No abstract provided.

Interoceptive Discriminative Stimuli Produced By Clonidine: Relationship To Alpha(2) Adrenoreceptor Stimulation And Hypotension, Debra Ann Bennett

Open Access Dissertations

No abstract provided.

The Establishment Of Conditioned Reinforcement In Rats: Information Value Or Contiguity, Robert Stephen Harris

Open Access Master's Theses

An experiment was performed to determine the relative efficacy of "predictive information value" and of temporal contiguity with a primary reinforcer (S^R) in establishing conditioned reinforcement value of previously neutral stimuli. Three different temporal patterns of pairs of neutral stimuli were presented both contiguously with non-response contingent primary reinforcement (experimental groups) and non-contiguously with primary reinforcement. Subsequently, the efficacy of these stimuli in reinforcing a new response (lever press) was assessed, both across pairs of stimuli and within each pair. Previous findings regarding the optimal temporal intervals between stimuli and between stimuli and reinforcement for maximum information value …

The Effect Of Adrenalectomy And Stress On Autoanalgesia In The Rat, Patricia A. Seymour

Open Access Master's Theses

A literature review showed that since the discovery of the endogenous opioid peptide, Beta-endorphin, and the fact that it is secreted along with ACTH as part of the stress response, much investigation has been directed toward determination of the role of this substance in autoanalgesia which is known to result from a variety of stressors. ACTH (and presumably, Beta-endorphin) are known to be secreted in very high amounts following stress in 24-hour adrenalectominzed. The present study, therefore, predicted that cold water swim (CWS) stress would induce analgesia, as measured by the tail-withdrawal analgesia test, in adrenalectomized and control rats, 24 …

The Effect Of Forced Warm Swim On Escape Learning In Rats, Katherine A. O'Neill

Open Access Master's Theses

Recently, an animal model of depression, which appeared to be sensitive to clinically effective antidepressant treatments, was described by Porsolt et al (1978b). The model was derived from the observation that rats forced to swim in inescapable warm (25°C) water for fifteen minutes become immobile after some time. Immobility was characterized by animals floating in an upright position, with only their heads above water. When retested twenty-four hours later, rats showed significantly longer lengths of immobility than naive controls. The investigators labeled this response "behavioral despair". In the present study, two experiments were performed to further investigate "behavioral despair". In …

Determination Of Animal Fat In Margarine By High Pressure Liquid Chromatography Of The Sterols, Ali Alaidaros

Open Access Master's Theses

The utility of high pressure liquid chromatography as a routine method to detect animal fats in vegetable margarines on the basis of sterol content was investigated. Cholesterol, which makes up almost 100% of the total sterol in animal fats, constitutes only 0-4% of the total sterols in vegetable oils.

The major phytosterols in vegetable oils currently used for margarine production are B-sitosterol, stigmasterol and campesterol. Brassicasterol is less conunon but in rapeseed oil it is present in high proportion. The minor phytosterols are: ~ 5 -avenasterol, ~ 7 -stiqmasterol, 7 ~ -avenasterol, 24-methyl cholest-7-enol and cholesterol.

A uBondapak c18 column …

Identification And Differentiation Of Species In Cooked Meat By Vertical Plate Gel Electrophoresis, Hamad Al-Awfy

Open Access Master's Theses

Since quality control for adulteration in meat is very important, the vertical plate polyacrylamide gel electrophoretic technique was studied for the detection and identification of cook ed and canned species extracts.

Meat samples from beef, pork, lamb and horse were heated for one hour from 65-75°C at intervals of about 5°C. Be' cause most of the research on the effect of cooking meats on the denatured serum proteins and the resultant electrophoretic patterns were done on beef, beef cooked at 70°C was selected as an initial trial for protein solubilization in order to choose an extraction and applying procedure for …

Environmental Assessment Of Industrial Development Hopkins Hill Industrial Zone, Coventry-West Greenwich, Rhode Island, Joel Rinebold

Open Access Master's Theses

One method used to identify, analyze and minimize environmental degradation from proposer development is the employment of an environmental impact assessment. An environmental impact assessment can supply information which can be used to help locate and determine the type of development on a particular site.

The following is an environmental impact assessment for the Coventry/West Greenwich Zone. It is great expectations that this report will serve the residents of the state and users of the site by supplying the information necessary to preserve the integrity of the natural environment while allowing maximum development.

Coventry: A Guide To Future Growth Through Environmental Suitability And Land-Use Regulations, Richard T. Chew

Open Access Master's Theses

The objectives of this project are twofold: 1) increase awareness in the Town of Coventry of the need for local policies that address the issue of growth, and 2) assist the town in formulating policies that will accommodate future growth with the least impact. This report does not advocate a no growth policy, rather it recognizes the need to channel future growth in an orderly and efficient manner.

It is hoped that this report will be published and circulated to various officials and residents of Coventry in hopes of generating a greater awareness and understanding of the issues involved in …

The Preparation, Physiochemical Characteristics And Functional Properties Of Chicken Blood Plasma And Its Isolates, Pavlos Achilles Karakoltsidis

Open Access Dissertations

No abstract provided.

Potato Waste As A Substrate For Single Cell Protein And Enzyme Production, Adilades A. Arenas Santiago

Open Access Master's Theses

The feasibility of using potato wastes as substrate for or single cell protein (SCP) and extracellular enzyme production by Pleurotus ostreatus was· studied in submerged culture.

Cell mass yield and enzyme production of P. ostreatus we re studied as a function of (1) substrate concentration, (2) source of nitrogen, (3) temperature, (4) pH and (5) the addition of sodium bisulfite on the medium. The fermentation process was carried out to batch cultures in 250 ml flasks . Protein content on a dry cell mass basis, alphaamylase activity and reducing sugar content in the broth were determined in all the growth …

Woman, Utopia And Ideology: A Case Study In Sociology Of Knowledge, Margaret M. M. Vanderbroek

Open Access Master's Theses

This study utilizes the perspective of the sociology of knowledge to examine the interrelationships between the characterization of woman in the utopian genre and attitudes toward woman in those Western societies where this literary form flourished. The history of the genre from early Greece to the present century traces interconnections and dependencies of form and intent. In chronicling the sociology of utopia, this study describes and analyzes the process by which utopian literature may be seen as a reflexive critique of the society which produced it. Examples from selected literary works place characterizations of woman and role into social and …

Cognitive Deficits In Alcohol Troubled Females: A Comparative Study, Francis Raymond Sparadeo

Open Access Dissertations

No abstract provided.

Human Pharmacokinetics Of 5-Formyl Tetrahydrofolate, Bruce Kenneth Birmingham

Open Access Dissertations

The purpose of this study was to determine the pharmacokinetics of calcium leucovorin in normal subjects and in patients undergoing High-Dose methotrexame therapy for the treatment of neoplastic disease. By characterizing the disposition of leucovorin it was hoped that the efficacy of the aethotrexate therapy might be improved, while at the same time, the incidence of toxicity could be diminished.

An assay for the separation and quantification of leucovorin in serum was developed. The reduced folate vas extracted from serum using reverse-phase chromatographic minicolumns and a paired-ion reagent. Leucovorin was eluted from this system in methanol and evaporated to dryness …

Production And Characterization Of Enzymes From Animal Waste Material, Joaquim Francisco Da Ponte Tavares

Open Access Dissertations

No abstract provided.

Effects Of Different Mixing Schedules On Phytoplankton, Zooplankton And Nutrients In Marine Microcosms, Candace A. Oviatt

Graduate School of Oceanography Faculty Publications

An experiment was carried out with different mixing schedules in marine microcosms. Continuous mixing resulted in higher chlorophyll concentrations, lower nutrient concentrations and lower zooplankton biomass than no mixing. No mixing caused water-column stratifications of chlorophyll and nutrients, as well as of organisms such as flagellates and rotifers adapted to low-mixing regimes. The most dramatic result was the low biomass of zooplankton in the continuously mixed microcosms and the high biomass of zooplankton in the unmixed microcosm.

The Effect Of Clinical Drugs On Warfarin And Vitamin-K Metabolism And Action, Linda Jane Kelly

Open Access Dissertations

No abstract provided.

A Remotivation Program For Children With Reading Problems, John James Kenny

Open Access Dissertations

No abstract provided.