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Synthesis And Characterization Of Diamond And Boron Phosphide, K. P. Ananthanarayanan

Open Access Dissertations

Semiconducting diamond has been synthesized from carbon-metal melts in a 600 ton tetrahedral anvil press at about 60 kbar and 1400°c. The experimental set up, pressure and temperature calibrations, and the growth region in the pressure-temperature regime are indicated. Micrographs of synthesized crystals are shown.

The semiconducting properties of diamond, doped with boron, aluminum and titanium have been interpreted using the log R versus l/T curves. In boron-doped diamond ''high concentration" type impurity conduction occurs and the activation energies vary from 0.15 eV to 0.30 eV. The activation energies for aluminum and titanium-doped samples are found to be 0.31 eV …

Glyoxal And Estradiol Mediated Alterations In Rat Uterine Histone Acetylation, Robert Louis Procaccini

Open Access Dissertations

The immature rat uterus was developed as a model in which to measure alterations in his tone acetylation in a target organ following hormonal stimulation. The effect of various glyoxal derivatives on his tone acetylation and several other parameters was measured in the uterine tissue of untreated and estradiol treated animals. Six day treatment with glyoxal monohydrate and methylglyoxal-bis-guanyl-hydrazone (Methyl-GAG) decreased uterine wet weight and partially blocked estradiol mediated alterations in uterine wet weight in animals receiving concomitant estradiol and glyoxal treatment.

The dose dependent in vitro inhibition of uterine histone acetylation is thought to occur through direct action on …

The Effect Of Modifiers Of Microsomal Electron Transport On Carbon Tetrachloride Hepatoxicity, Kenneth Alfred Suarez

Open Access Dissertations

Phenobarbital pretreatment significantly enhanced the rise in SGOT and SGPT immediately following a three-hour exposure of rats to carbon tetrachloride by inhalation. However, these parameters of hepatotoxicity were significantly lower in rats pretreated with 3-methylcholanthrene when compared to rats pretreated with vehicle and exposed to carbon tetrachloride vapor. Levels of hepatic microsomal NADPH cytochrome c reductase and CO-binding pigment were elevated by phenobarbital pretreatment, but 3-methylcholanthrene had no effect on hepatic microsomal NADPH cytochrome c reductase. Although carbon tetrachloride exposure reduced CO-binding pigment content by 61 per cent in phenobarbital pretreated and by 39 per cent in 3-methylcholanthrene pretreated rats, …

A Dynamic Study Of A Pilot Eckey Horizontal Fractionator, Robert Kingsley Andren

Open Access Dissertations

In order that the automatic control of a process system be optimal, the dynamics of the equipment involved must be throughly understood. Distillation is a complex non-linear process and as such, many of the dynamic system parameters are difficult to predict accurately and must be determined experimentally. The purpose of this study was to develop a series of dynamic models which characterize the response of the liquid temperature on the plates of a pilot Eckey Horizontal Fractionator, to variations in liquid feed rate, liquid feed composition, and vapor feed rate. This was done by experimentally determining the frequency response of …

Beam Position Transient Response In The Controlled Optical Beam Waveguide, Edmond Francis Roy

Open Access Master's Theses

Beam position transients in self-aligning beam waveguides are studied. The control system senses the beam position at each lens and introduces a correction to the transverse position of the. Preceding lens. The Laplace Transform of the beam position response at some (k + n)^th lens as a result of a disturbance of the k^th lens is found. The special case of the confocal waveguide using the integrator with gain as a control results in a time function of the beam position at the lenses equal to the product of a decaying exponential and Laguerre Polynomials. The second-order controlled …

Biological And Commercial Fisheries Related Research On The Channeled Whelk Busycon Canalculatum (Linne) In Narragansett Bay, Rhode Island, Richard T. Sisson

Open Access Master's Theses

The three year study consisted of two phases. Phase one investigations included movement, growth, age and size determinations, and population structure of areas of Narragansett Bay, Rhode Island. Aspects of the commercial fishery which appeared lacking in data necessary to optimize results from fishing effort were investigated in phase two. Included were market size determination, bait containers, trap designs, and seasonal catch variation by fishermen.

Movement of marked channeled whelks along the bottom of the bay was random and not correlated with other variables such as growth or month of the year. Growth of all returned tagged animals averaged 2.6 …

The Effects Of Auditory And Shock Stimulation Experienced In Infancy On Subsequent Emotionality And Learning In The Rate, Arnold Charles Small

Open Access Master's Theses

In this study, 79 young rats were exposed to different types of infantile stimulation in order to determine the effects of stimulation of different sensory modalities on emotionality and learning. Between the eleventh and twentieth days of life, the subjects received either a 25 volt A.C. shock, 75 decibels of white noise (aversive auditory stimulation), or 45 decibels of white noise (nonaversive auditory stimulation). One group was handled (handled control) and another group was l eft alone (nonhandled control). The hypothesis tested was that the different types of stimulation would lead to a reduction of emotionality and an increase in …

Fear Reduction Under Avoidance Blocking, Donald Spring

Open Access Master's Theses

Forty-one rats were given ten minutes of exposure to the alley runway apparatus. Eleven subjects were placed in a non-shocked control group. Thirty-one subjects were trained to make an avoidance response in the alley to a criterion. Nineteen rats were divided into two experimental groups depending on their behavior demonstrated under twenty-five minutes of response blocking. Subjects demonstrating relaxed types of behavior were placed in the relaxed group, Subjects not demonstrating relaxed behavior were assigned to the nonrelaxed group. Eight avoidance trained subjects were put in a shocked control group and were not blocked. Later exposure to the apparatus demonstrated …

Brain Sensitivity To Barbiturates And Brain Gamma-Aminobutyric Acid, Girish J. Patel

Open Access Master's Theses

The correlation between alteration in brain sensitivity to barbiturates and changes in brain gamma-aminobutyric acid levels was investigated. The following conditions were utilized to alter the brain sensitivity of mice or rats to barbiturates, 1) exposure to hypobaric hypoxia, 2) septal lesions, 3) treatment with desipramine, sodium nitrite or pargyline, 4) social deprivation, and 5) abrupt withdrawal following chronic barbiturate or ethanol administration. The first three of these conditions have been known to increase the brain sensitivity to barbiturates, while the last two conditions are known to decrease the sensitivity of brain neurons to barbiturates. The brain levels of gamma-aminobutyric …

The Role Of An Old Woman: A Study Of Edith Sitwell's Final Persona, Stephen William Applin

Open Access Master's Theses

The year 1940 marked a radical change in the poetics of name Edith Sitwell (1887- 1964). Previously the hallmark of her poetry had been her elaborate experimentation with the sounds of words. She regarded her experimentation as a revolt against Georgian insipidity. Her findings were radical and only slowly accepted by the poetry reading public. Her later poetry, however, has very little in common with the early. In 1940, Dame Edith was 53 years old . She was too old to continue finding pleasure through the sometimes shocking wit of her early experiments. She regarded herself as an old woman, …

Land Development Policy On The Local, State, And National Levels: A Case Study Of Narragansett, Rhode Island, Thomas William Fennessey

Open Access Master's Theses

The three primary purposes of this study are: to identify and assess existing land development policies in Narragansett, Rhode Island, to determine any deficiencies in those development policies, and to suggest possible future actions to remedy those deficiencies. Since these policies are not isolated from the dynamics of a growing community, an analysis was also performed of such basic data as land use, population, and housing to predict the effect these variables would have on the town's future development. The interrelationship of these three variables with land use policy was demonstrated.

The major land use policies of the Town were …

Organization And Development Of A Computerized Drug-Drug Interaction File, Charles Daniel Mahoney

Open Access Master's Theses

The project was designed to organize and develop a computerized drug-drug interaction file. The methodology for the organization, storage and retrieval of drug-drug interaction information is discussed. In order to accomplish this objective several requirements were met. They are as follows: (1) Selection and evaluation of clinically significant drug-drug interactions from the scientific literature, (2) Creation of a computerized data bank for drug-drug interactions, and (3) Design and development of a computerized printout which reports the information in concise summaries. The file is designed to be compatible with existing computerized record keeping and drug information systems. In addition, the retrieval …

Solubility Of Four Aminobenzoate Esters In Water And Normal Alcohols At Several Temperatures, Peter Allen Schwartz

Open Access Master's Theses

Equilibrium solubilities of the first four homologous alkyl p-aminobenzoate esters were determined in methanol, ethanol, n-propanol and water at 25°, 33° and 4o° C.; the esters and the alcohols comprise separate but similar homologous series. The solution process of a solute may be considered to be the summation of two sequential steps, melting and mixing, and the magnitude of solubility depends upon temperature and the extent of interactions between solute and solvent molecules. Quantitative solute concentrations, obtained from spectrophotometric analysis, were converted by computer to mole fractions. Statistical analysis of the logarithmic mole fraction solubilities of the aminobenzoates, which were …

Ultrasonic Measurements In Binary Solutions Of Na-K And Na-Rb, Joseph Ernest Amaral

Open Access Master's Theses

The pulse-echo technique has been used to measure ultrasonic absorption and velocity in Na-K and Na-Rb alloys. Data were taken at temperatures from -5° C to 250° C using frequencies from 15 MHz to 105 MHz. It has been found that both Na-K and Na-Rb have absorption peaks near 67 atomic percent Na. The magnitude of the absorption was found to be much greater in the Na-Rb solutions. The results in Na-Kare consistent with previously reported measurements that were attributed to the equilibrium process 2Na + K⇌Na₂K. However, it is further speculated that the high attenuation in Na-Rb …

Poe's Concept Of Supernal Beauty As Applied To Selected Poems, Robert Charles Angell

Open Access Master's Theses

This thesis is primarily concerned with Edgar Allan Poe's application of his aesthetic philosophies to his poetic writings. In particular, the extent to which the selected poems are successful in attaining or simulating the attainment of supernal beauty is examined. The ideas herein dealt with are those having to do with Poe's reaching for the ethereal world of the imagination through his art. While specific poems are analyzed with respect to his critical writings, this thesis never assumes that his poetry was nothing save a practical exercise of those theories. The selected poems are explored with regard to their validity …

United States Annexation Of The Philippines: A Reinterpretation, William P. Connor Jr.

Open Access Master's Theses

This thesis critically examines the traditional historical interpretation of the events leading to American annexation of the Philippine Islands, the acquisition itself, and the debate which followed the Spanish-American War concerning the fate of the Philippines. The major topics of investigation comprise the extent of American economic interest in the Pacific area prior to the war, the writings and activities of American officials and business leaders, both in the Pacific and in the United States, the way in which the United States actually came to possess the islands, the basic beliefs of anti-imperialists concerning foreign policy, and the debate which …

Pollution In Penobscot And Narragansett Bays: Its Advance And Effects On The Maine And Rhode Island Shellfish Industry, Michael James Chambers

Open Access Master's Theses

This study investigates two New England estuaries of similar configuration. Population density, type of industrial activity, degree of sewage treatment, and species of shellfish are found to be important factors in the present degradation of these bays. Unless a minimum of secondary sewage treatment is practiced in Penobscot Bay, depuration is the only economical way of utilizing future soft-shell clam stocks. In Narragansett Bay the options are greater. Because of the water temperature and the availability of clean water, among other criteria, aquaculture, depuration, transplanting, and quahog seed hatcheries may be utilized. However, the bypasses in the Providence Sewage Treatment …

Selected Portrayals Of Mau Mau, Mary Anne Tilton

Open Access Master's Theses

The general public seldom, if ever, has access to government documents until many years after an event. The public's attitudes and ideas are molded by exposure to various points of view and interpretations expressed in novels, personal memoirs, and newspaper accounts. For many years the interpretations of the causes, the growth, and the activities of the African revolutionary group known as Mau Mau in Kenya have been shaped by novels and personal memoirs written by Americans, Europeans, and white Kenyans. Generally, these persons were opposed to Mau Mau. In recent years, especially since Kenyan independence in 1963, more novels and …

Man's Relationship To Nature And Society In Hawthorne's The Scarlet Letter, Sherry E. Adams

Open Access Master's Theses

Nathaniel Hawthorne's treatment of man’s relationship to nature and society in The Scarlet Letter will be examined in this work. It will be necessary to examine Hawthorne's treatment of the beneficial and detrimental aspects of nature in his famous romance. In addition, a thorough study of Hawthorne's attitude toward the Puritan society will be made. Although Hawthorne deals exclusively with a community of Puritans in The Scarlet Letter, he appears to draw conclusions which would apply to any society at any time. A close analysis of each major character and his relationship to the community in which he lives and …