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Physicochemical Studies On The Catalytic And Regulatory Subunits Of Ribonucleotide Reductase From Calf Thymus, Robert Joseph Mattaliano

Doctoral Dissertations

The catalytic (M2) and regulatory (M1) subunits of calf thymus ribnucleotide reductase have been purified to homogeneity. Each runs as a single band in SDS-polyacrylamide gel electrophoresis with polypeptide molecular weights of 84,000 for M1 and 58,000 for M2. Additional evidence for homogeneity was obtained using high performance liquid gel chromatography. The native M1 subunit is predominately monomeric (R(,s) = 37 A) under experimental conditions while the M2 subunit is oligomeric (R(,s) = 53 A). The quaternary structure of the native M2 protein was evaluated by chemical cross-linking with dimethyl suberimidate. The results demonstrate that native M2 protein exists in …

Synthesis And Characterization Of Model Aquatic Particulates For Use In Sorption Studies, Frederick William Page

Doctoral Dissertations

The synthesis and characterization of single- and multi-component model aquatic particulars is the object of this dissertation. Particulates were synthesized from illite, humic and fulvic acids, and iron, aluminum, and manganese hydrous oxides. Characterization included measurement of cation exchange capacity (CEC), and attempts to determine surface area and the pH of zero point of charge. Each of these methods was tested to determine their applicability to aquatic particulates, and attempts were made to improve the methodology.

CEC varied with composition and time of aging. Pure hydrous oxides exhibited decreases in CEC over time. Aging effects were also shown by aluminum …

Electrophysiological Studies On Ulmus Americana, Jill Stanley Kathleen Shipman

Doctoral Dissertations

Although membrane potentials have been measured in algal cells and in large cells of some higher plants, this investigation is the first to include such measurements in mesophyll cells of elm (Ulmus americana) leaves. The inquiry entailed the development of the technique for measuring elm leaf cell membrane potentials, the determination of membrane potentials expected of healthy, greenhouse elms, and the effects of various physical and chemical factors on the membrane potentials of elm leaf cells.

The membrane potential of a specific cell, was measured by amplifying the potential difference between a microelectrode inserted in the cell and a reference …

Mineralogical, Textural, And Paragenetic Studies Of Selected Ore Deposits Of The Southeast Missouri Lead-Zinc-Copper District And Their Genetic Implications, Kenneth Bruce Horrall

Doctoral Dissertations

“A detailed paragenetic study of Pb-Zn-Cu ores from the Viburnum Number 28, Brushy Creek, and Goose Creek mines in the Southeast Missouri lead district indicates a complicated paragenesis characterized by repeated periods of mineral deposition. The sequence is composed of nineteen minerals including abundant galena, sphalerite, chalcopyrite, pyrite, marcasite, dolomite, calcite, and quartz and minor siegenite, bornite, bravoite, blaubleibender covellite, covellite, gersdorffite, digenite, enargite, tennantite, dickite, and malachite.

The paragenesis indicates that the ore solutions evolved in the following order: (1) Cu-rich, (2) Co-Ni-rich, (3) Pb-Zn-rich, and (4) Fe-rich. Subsequent repeated generations include cubic galena, later sphalerite, and minor crystalline …

Gaseous Reactions In Heteroporous Media, Elmer Anthony Klavetter

Doctoral Dissertations

"A modified dusty-gas model which accounts for the effects the pore-size and tortuosity distributions have on the mass fluxes in heteroporous media is presented. The behavior of the dusty-gas model (homoporous model) can be obtained from the modified model when the pressure is either very low or very high as well as for intermediate pressures when the characteristic parameter of the introduced tortuosity function has a very small value. When the pressure is very high or very low, all pores in the porous medium are almost in a single transport regime of either molecular or Knudsen diffusion.

Comparisons of the …

A Dwba Study Of Atom-Diatom Rearrangement Collisions, Randall Wayne Emmons

Doctoral Dissertations

"The role of the transferred angular momentum in state-to-state atom-diatom reactive scattering is investigated. Using the F+H₂ reactive system in this model study, it is found that many features in the state-testate differential and total cross-sections can be qualitatively explained. In particular, a maximum total cross-section occurring in a vibrational manifold of HF can be shown to occur due to an angular momentum match"-- Abstract, p. ii

Comparative Study Of The Boundary Element Technique And The Finite Element Method In Two Dimensional Eigenvalue Problem, Farough Baradari

Doctoral Dissertations

"In this work we investigate the applicability of a "Boundary Element method 11 for the numerical solution of the Liouville and Helmholtz eigenvalue problem for different two-dimensional geometries including a typical reactor configuration. The method is based on the discretization of the unknown along the boundary and Green's function representation of the governing equation.

To compare the capability of this method with the finite element method, a finite element code which uses quadratic quadrilateral isoperimetric elements was developed. A boundary element code was also written. These codes were used to determine the fundamental eigenvalue for several two-dimensional geometries -- square, …

The Heterogeneous Nucleation Of Ice On Ion Implanted Silicon, William Henry Stinebaugh

Doctoral Dissertations

"Ice crystal nucleation on 1 80 keV Si⁺ ion implanted silicon was investigated experimentally at three different temperatures: T = - 20 °, - 24 °, and -30 ° C. The ion doses ranged from 4 .0 x 10¹⁴ ions/cm² to 5 .0 x 10¹⁵ ions/cm². The supersaturation dependence of ice nucleation on the ion implanted samples at these three temperatures was observed by controlling the substrate temperature and relative humidity independently.

An enhanced ice nucleation activity was observed on samples implanted with ion doses in the range of (1.6 - 2.0) x 10 …

Order And Disorder In Early Connecticut: New Haven, 1639-1701, Robert West Roetger

Doctoral Dissertations

This dissertation assesses order and disorder in New Haven, Connecticut from its founding in 1639 to the introduction of Justices of the Peace in 1701. It juxtaposes concepts of the well-ordered society as expressed in puritan rhetoric with the reality of behavior as reflected in legal documents to illustrate the pre-eminent role assumed by law in ordering society. What emerges is a picture of society not rigidly caught up in the policies of perfection, but one characterized by responsive lawmaking, equally flexible enforcement, and reliance upon formal legal institutions to resolve private controversies.

The study begins with a portrait of …

Extensions, Generalizations, Characterizations And Testing For Independence Through Infinite Divisibility, Edward Joul Danial

Doctoral Dissertations

This dissertation investigates various related topics around the exciting concept: "Infinite Divisibility." First, two intricate distributions, namely, the univariate generalized Waring and the hyper-Poisson are proved to be infinitely and noninfinitely divisible, respectively. Analysis and computer approaches are employed. This itself extends the use of some results introduced by Katti, Steutel and Warde. Secondly, generalizations to Warde, Katti and Steutel's sufficient conditions and related results are achieved. Then, numerical application is presented. Thirdly, characterizations through infinite and finite divisibility are obtained. The Poisson, negative binomial, geometric, Bernoulli and uniform c haracterizations in terms of infinite divisibility are deduced. Some of …

Chemical Corrosion Of Ag Films On Glass, Hyun Soo Park

Doctoral Dissertations

"The chemical corrosion of chemically, vacuum and sputter deposited Ag films on an aluminoborosilicate and a soda lime glass was investigated in wet HCl and saturated water vapor as a function of concentration, temperature and time. The higher corrosion resistance of chemically deposited Ag films in comparison to evaporated or sputtered Ag films is attributed to their lower microvoid density and higher adhesion strength. Ag films on the more chemically durable aluminoborosilicate glass had a higher corrosion resistance. Furthermore, films which received a moderate thermal annealing (80 to 140° C) or were deposited on a glass surface washed with HN0 …

From Slave To Free Labor In The Brazilian Sugar Industry: The Political-Economy Of Social Control And Crime In Pernambuco, 1850-1922, Martha Diane Knisely Huggins

Doctoral Dissertations

Between 1850 and the turn of the century the dominant mode of production in the export sector of Pernambuco shifted from a slave to quasi-capitalist. The labor transition was not an evolutionary outgrowth of existing work relations--it involved struggle and coercion. The first part of this research shows how repressive social control effected the transformation of the mode of production; the second part looks at a product of the transformation, crime.

This research focuses on a frequently overlooked type of human intervention, social control, as a source of structural change, and places the motives of modernizing elites in a less …

High Energy Cosmic Ray Charge And Energy Spectra Measurements Above 100 Gev/Nuc, Jon H. Chappell

Doctoral Dissertations

In 1976, 1977 and 1978, three balloon flights were conducted to measure the energy spectra of cosmic ray nuclei. A gas Cerenkov detector with different gas thresholds of 8.97, 13.12, and 17.94 GeV/nuc was employed to extend these measurements to high energies. The total collection factor for these flights is greater than twenty m('2) ster-hr. Individual charge resolution is achieved over the charge range Z = 4 - 26, and overlapping differential spectra are obtained from the three flights up to (TURN)100GeV/nuc.

Diffusion Controlled Vinyl Polymerization, Sung Kuk Soh

Doctoral Dissertations

It is well known that the polymerization rate and the molecular weight distribution of vinyl polymers can change markedly during the course of polymerization and that these changes are due to the influence of self-diffusion upon the termination reaction. This phenomenon is commonly referred to as the gel effect and in order to explain the polymerization behavior after the onset of the gel effect, the chain length dependence of the termination reaction should be considered.

A new method of handling polymerization kinetics with the chain length dependence termination reaction is proposed, which is largely independent of the form of the …

A Study Of The Metal-Binding Organic Constituents In Great Bay Sedimentary Systems, William Ray Lammela

Doctoral Dissertations

The fact that the concentration of copper in pore fluids exceeds the values predicted by simple solubility products has led to the suggestion that the copper is solubilized by the formation of copper-organic matter complexes. Previous attempts by other workers to form these complexes have utilized material that may not be representative of organics naturally present in sediments.

Organic matter was isolated from anoxic sediments of Great Bay estuary in New Hampshire. Pore water, a double-deionized water extract, and an artificial seawater extract were used to isolate organic matter from the sediments. Dissolved organic carbon measurements revealed that the seawater …

The Characterization And Utilization Of Bark As A Floriculture Growing Medium, Charles Hartman Williams

Doctoral Dissertations

The use of fresh, inprocessed bark as a component of a soil-less medium for selected pot grown floriculture crops was evaluated.

Blends of bark of northern hardwood and softwood tree species from two New Hampshire sources were physically and chemically characterized. Measurements included N, P, K, Ca, Mg, pH, and total soluble salts on growing media and spectrographic analyses of plant leaves.

Observations, including height and fresh weight, of the chrysanthemum cultivar "Bright Golden Anne" (Chrysanthemum morifolium Ramat) in media containing various amounts of the two bark blends in combination with vermiculite and perlite were evaluated. Treatments consisting of various …

No-Tillage Renovation Of Alfalfa Stands, George William Mueller-Warrant

Doctoral Dissertations

The effects of herbicides, timing, and rates on the introduction of alfalfa (Medicago sativa L.) into six stands of alfalfa at varying stages of decline were investigated.

Alfalfa was seeded on several dates from 25 April through 28 May 1979 with a Tye Pasture Pleaser('R) no-till seeder. G.

Relative Impact Of National And Foreign Savings In The Process Of Economic Growth: The Case Of Senegal, Abdoul Aziz Dia

Doctoral Dissertations

The basic questions we address in this dissertation are the following: What was the relation between national savings and foreign savings during the 1960-1976 period for Senegal? What was the relative contribution of these two types of financing to economic growth?

A review of the literature reveals the coexistence of two main hypotheses. The first one stipulates that foreign financing and domestic financing are substitutes, whereas, the second one claims that they are, at the best, complements.

Numerous empirical studies using single equation models support the substitutability hypothesis. In other terms, they show a negative relationship between national and external …

Maintenance Of Nonsmoking Following Self-Initiated Cessation, Susan J. Goldstein

Doctoral Dissertations

The process of trying to maintain abstinence from cigarettes was assessed in a longitudinal, descriptive study of self-initiated quitters. Participants completed: (1) a preliminary questionnaire; (2) six follow-up questionnaire packets mailed to them monthly; and (3) a final questionnaire sent with the sixth follow-up packet.

Abstainers and relapsers differed in the following ways: (1) Relapsers more often indicated cessation goals which left open the possibility of future smoking; (2) Although both groups began their participation with relatively high levels of commitment to quit, abstainers' levels were slightly higher than relapsers'. At the conclusion of their participation, relapsers' commitment to quit …

Special Applications Of Irreversible Thermodynamics, Yakov Michael Zilberberg

Doctoral Dissertations

Thermodynamic analysis of various physical phenomena, chemical processes, and industrial installation has become a very important part of engineering work. The evergrowing sophistication of the contemporary technical world has brought about the necessity of extensive developments and applications in the field of Irreversible Thermodynamics which enables one to efficiently treat phenomena that are spatially and temporally non-equilibrium ones, and therefore thermodynamically irreversible. The unavoidable facts that all industrial processes experience randomly distributed external and internal excitations, and also that their variables, being automatically controlled, fluctuate in space in time, require a systematic improvements of the adopted methods of Irreversible Thermodynamic …

The Ecology Of A Submersed Macrophyte, Myriophyllum Heterophyllum: Competition For Nutrients With Phytoplankton And Seasonal Changes In Tissue Mineral Content, Kenneth David Kimball

Doctoral Dissertations

Myriophyllum heterophyllum is a nuisance, submersed hydrophyte in New Hampshire. First observed in Lake Winnipesaukee, New Hamsphire during the 1960s, the plant infested over 22 miles of the lake's shoreline by 1980. Circumstantial evidence suggests that M. heterophyllum was accidently introduced to New Hamsphire by trailered boats. Physiological and ecological data that relate to the recent success of this species in the state are reviewed.

Myriophyllum heterophyllum submersed apices were analyzed for ash, phosphorus, sodium, potassium, calcium, magnesium, iron, manganese, zinc, copper and lead over a 2 1/2 year period, and the floral stem, apex, sub-apex, mid-stem, lower stem and …

Effects Of Stimulus Complexity, Subject Age, And Stimulus Coding On Selective Stimulus Control, Ronald Louis Michaud

Doctoral Dissertations

Selective stimulus control refers to the functional relationships that are developed between the various stimulus elements of a discriminative stimulus and the subject's response. A multi-element conditional discrimination problem is an effective means of studying these relationships. In the first experiment, preschool and adult subjects were presented with a series of conditional discrimination problems. They were required to respond differentially to two multi-element stimulus cards by touching one of two response circles, one red and one blue. Each problem set contained either two, four, six, or eight elements per stimulus card. The discrimination was established using an errorless training procedure …

Water Quality Impact Of Non-Point Source Contaminants In Small Tidal Rivers, Edward John Schmidt

Doctoral Dissertations

An integrated numerical modeling methodology was developed for analysis of non-point contaminant production and water quality impacts in estuarine receiving waters. The methodology was calibrated against contaminant source observations and estuarine data.

Contaminant source loading is based on the runoff curve number technique combined with a partial contributing area approach. Sediment washoff is used as an indicator of contaminant quantities.

Hydrographs and contaminant load time series are introduced into a set of one-dimensional estuary models. Freshwater flow and tidal height are forcing functions for dynamic computation of velocity and water surface profiles. The effect of longitudinal salinity distribution is included …

Kinetic Processes In A High Pressure Laser Generated Plasma, Danny Joe Krebs

Doctoral Dissertations

"A dense sodium vapor in a high-pressure noble buffer has been simultaneously excited by short (4 ns) laser pulses from two lasers: ii the first tuned to one of the 'D' line transitions and the second tuned to either the photoionization threshold of the 3p states near 406 nm or to a higher level 3p-nd resonance. The population densities of the excited levels of atomic sodium were measured with temporal resolution by absolute intensity measurements of excited state fluorescence. At early times (~100 ns), excited state populations are determined by energy transfer collisions between two laser-excited 3p atoms while the …

How Communication And Confirmatory Strategies Affect The Search For Truth, Michael Ernest Gorman

Doctoral Dissertations

Scientific reasoning has become a topic of recent psychological research. Studies have focused on Karl Popper's idea that scientists should try to falsify, or disconfirm, their hypotheses instead of verifying them. Results indicate that both scientists and college students prefer to use confirmatory logic on simple tasks that model scientific reasoning. The only attempt to instruct subjects to use disconfirmatory reasoning failed (Mynatt, Doherty & Tweney, 1977) though subjects that falsified on their own initiative were more successful than subjects who tried to confirm.

All the studies of scientific reasoning have focused on individuals. But major advances in science are …

The Heroic Plot In Epic And Romance: A Study Of The Monster-Fight Motif From "Beowulf" To The "Faerie Queene", Feroza Rustom Vaghaiwalla

Doctoral Dissertations

This dissertation focuses on the Heroic Plot or the hero-monster conflict as it appears in five major works: Beowulf, Tristan, Yvain, Sir Gawain and the Green Knight, and Book One of The Faerie Queene. It traces the survival of this motif from its archetypal deployment in epic song through its various forms in the romance narratives to its ultimate metamorphosis in Christian allegory.

The Heroic Plot is central in Beowulf where heroism is defined in purely physical terms. The monsters are treated seriously as superhuman creatures which must be destroyed in physical combat, and the conflicts are described in vivid …

Women And Work In Transition: Their Work Participation, Social Class, Sex Role And Political Attitudes, And Alienation, Lawrence Allen Rosenberg

Doctoral Dissertations

The focus of this dissertation is the transition of American women's economic positions during the last two centuries. Women's participation in the economy has developed from that of the preindustrial period, in which women were primarily partners in an agricultural economy, through several stages during the development of industrialism and urbanism, when most women were housewives, to the present situation in which over 50% of women are active participants in the labor force of an advanced industrial economy. This transition has been characterized not just by increasing numbers and changing characteristics of women participating in the work force, but by …

Diary Of The Damned: A Study In Theocentric Anxiety In Pre-Awakening New England, Raymond Bernard Wilbur

Doctoral Dissertations

The diary of Joseph Moody, the subject of this dissertation, hidden behind a coded Latin text for 240 years, reveals the intensity with which some New England Puritans pursued the preparationist-predestinarian discipline propounded by Thomas Shepard and others among New England's founding fathers. Such was the "preacher's gift" of Samuel Moody to his son Joseph, in the preparationist tradition of Shepard, that the son became convinced that God had passed him by and that he was irretrievably lost and damned forever. The diary is young Moody's record of his futile quest for signs of his election and salvation.

Deeply troubled …

An Evaluation Of The Effects Of Multicultural Education On The Attitudes Of Ethnic Minority And Majority Students At Cortez Elementary School, Peggy Terri

Doctoral Dissertations

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A Thermochemical Study Of The Ore Deposits Of The Milliken Mine, New Lead Belt, Missouri, Douglas L. Rickman

Doctoral Dissertations

"The ore body at the Milliken mine is a typical Mississippi Valleytype ore deposit. Mineralization is in a dolostone and structures are subtle, but very important ore controls. The major mineralogy is simple, predominately galena, luminescent hydrothermal dolomite, sphalerite and chalcopyrite. Twenty-three additional minerals have been identified in the ores, including barite and Pb-aragonite, bot h of which have not previously been recognized in the district.

Paragenetically, the ores are very complex, with four major, distinct periods of mineralization plus numerous periods of dissolution. The paragenesis provides evidence for the dynamic, evolving nature of the ore system. Galena textures, euhedral …