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Evidence For An Outer Membrane - Association Precursor Of The Extracellular Protease Produced By Serratia Marcescens., Laura Robin Liss Jan 1983

Evidence For An Outer Membrane - Association Precursor Of The Extracellular Protease Produced By Serratia Marcescens., Laura Robin Liss

LSU Historical Dissertations and Theses

Serratia marcescens LRL781, a gram-negative bacterium, produces an extracellular protease. Evidence is provided for an outer membrane-associated, larger molecular weight, enzymatically inactive precursor of the protease. Antiserum was prepared against the extracellular protease, which was purified from the supernatant fraction of S. marcescens LRL781 cultures. Column adsorption of the antiprotease serum was performed using a slurry of live cells and cellulose. The resulting effluent was serologically inactive against protease preparations and chromium chloride-coupled protease-rabbit erythrocytes. Whole washed cells agglutinated in the presence of the antiserum. Cells were uniformly labeled with ferritin conjugated goat anti-rabbit IgG, indicating that the protease precursor …

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Strangers In The Land: The Southern Clergy And The Economic Mind Of The Old South., Kenneth Moore Startup Jan 1983

Strangers In The Land: The Southern Clergy And The Economic Mind Of The Old South., Kenneth Moore Startup

LSU Historical Dissertations and Theses

The antebellum southern clergy has often been characterized as narrow-minded and reactionary with little or no social vision and with little or no commitment to social reformation. My study, which is based upon an expansive survey of the sermons and religious writings of protestant slave state ministers, reveals instead an insightful, critical, and outspoken clergy determined to change southern society; principally to turn southerners from materialism and greed to spirituality and altruism. In their attempt to reform southern society, they condemned explicitly what they considered the ostentation, arrogance, and selfishness of the upper classes and called for a more equitable …

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Minnesota Multiphasic Personality Inventory (Mmpi) Response Patterns Among Prisoners Under Varied Instructional Sets., Rafael Francisco Salcedo Jan 1983

Minnesota Multiphasic Personality Inventory (Mmpi) Response Patterns Among Prisoners Under Varied Instructional Sets., Rafael Francisco Salcedo

LSU Historical Dissertations and Theses

The purpose of this study was to examine the effect of various instructional sets on the MMPI performance of prisoners. Specifically, an attempt was made to examine whether any significant biases existed in the scales and ratios used to measure the prisoner's attitudinal set concerning the MMPI. Ninety-six subjects were selected from the U.S. Camp and Penitentiary in Lompoc, California. The subjects were randomly assigned to three groups of 32 subjects each. One group was requested to take the MMPI under instructions to malinger psychopathology. Another group was instructed to take the MMPI under instructions to deny or conceal any …

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Platonic Economic Theory: The Economics Of Moderation., Kenneth Neal Townsend Jan 1983

Platonic Economic Theory: The Economics Of Moderation., Kenneth Neal Townsend

LSU Historical Dissertations and Theses

This dissertation analyzes the contributions to the economic analysis of welfare made by the ancient Greek philosopher Plato. Heretofore unexamined, these contributions demonstrate the importance of the development of notions of sufficiency and moderation as integral parts of welfare analysis. This dissertation also examines the significance of Plato's method of inquiry into matters of social science for contemporary economic analysis. In particular, the importance of metamathematical induction for the acquisition of knowledge of the values upon which welfare depend is analyzed in the form that it is employed in Plato's dialogues. This analysis is conducted to the end that economists …

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The Beta-Fructofuranosidase Of Kluyveromyces Fragilis And Its Use In Inulin Hydrolysis., Wesley Earl Workman Jan 1983

The Beta-Fructofuranosidase Of Kluyveromyces Fragilis And Its Use In Inulin Hydrolysis., Wesley Earl Workman

LSU Historical Dissertations and Theses

Inulin, a polyfructan, is found as the reserve carbohydrate in the roots and tubers of various plants. The (beta)-fructofuranosidase (inulase) from the yeast Kluyveromyces fragilis is of interest because of its industrial potential in fructose syrup and alcohol production from inulin containing plants. The enzyme was purified and characterized with respect to its physical and kinetic parameters. The relationship between the enzyme and the yeast cell wall was also investigated. It was found that the inulase of Kluyveromyces fragilis could be immobilized in the yeast cells by glutaraldehyde treatment. Although the exact nature of the immobilization is not fully understood …

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Walter Georgii's Klaviermusik, Part Ii: A Translation And Commentary., Howard Gerald Aultman Jan 1983

Walter Georgii's Klaviermusik, Part Ii: A Translation And Commentary., Howard Gerald Aultman

LSU Historical Dissertations and Theses

In the European musical world, one of the most significant personalities of recent years was Walter Georgii (1887-1967). He was respected not only as one of Germany's most prominent pianist-pedagogues, but also as one of the most authoritative writers in the areas of piano performance and literature. One of Georgii's most important writings was a large work entitled Klaviermusik, the third edition of which appeared in 1956. The book is divided into two parts. The first part involves a comprehensive examination of the literature for solo piano and the second part involves an examination of the literature for piano duet; …

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Systematics, Redescription, And Geographic Variation Of The Blackside Darter, Percina Maculata (Pisces; Percidae)., Eugene Clifton Beckham Iii Jan 1983

Systematics, Redescription, And Geographic Variation Of The Blackside Darter, Percina Maculata (Pisces; Percidae)., Eugene Clifton Beckham Iii

LSU Historical Dissertations and Theses

A systematic study of the North American percid fish Percina (Alvordius) maculata (Girard) was undertaken to determine the extent and pattern of geographic variation, subspeciation, and sexual dimorphism. A brief nomenclatorial history is presented, the species is redescribed, and variation, distribution, habitat, and subgeneric relationships are discussed. Other than dorsal fin pigmentation, absence of modified midventral scales in females, and limited intrapopulational sexual dimorphism in a few morphometric characters, no variation in most of the thirty-nine characters examined is present between males and females. Morphometrics exhibited no pattern of geographic variation; however, meristic characters revealed a major trend in geographic …

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Models For The Economic Allocation Of Sampling Inspection Effort In Multi-Stage Production Systems., Hassan Dabbaghi Jan 1983

Models For The Economic Allocation Of Sampling Inspection Effort In Multi-Stage Production Systems., Hassan Dabbaghi

LSU Historical Dissertations and Theses

Appropriate inspection and control are significant components of production systems. Many products are manufactured in multistage production lines. At each stage the process can produce defective units. In order to produce finished products with desired quality in an economical way, considerations must be given to the explicit costs of inspection, repair, processing and disposal associated with particular levels of control and inspection. In this dissertation models and solution techniques are developed for simultaneous selection of sampling inspection plans and manufacturing operations control levels within multistage production systems. Per unit expected minimum cost of output quality, which satisfies specified consumer's and …

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Relationship Between Gene Frequencies And Indices Of Physiological Stress In The Estuarine Gastropod, Thais Haemastoma., David Wendell Garton Jan 1983

Relationship Between Gene Frequencies And Indices Of Physiological Stress In The Estuarine Gastropod, Thais Haemastoma., David Wendell Garton

LSU Historical Dissertations and Theses

The relationship between individual energy budgets and genetic variability was examined in Thais haemastoma acclimated to 7.5, 20 and 35('o)/oo S at 21(DEGREES)C. Energy budgets, after the equations of Crisp (1971), were determined by measuring rates of caloric ingestion, absorption efficiencies, oxygen consumption and ammonia and primary amine excretion. Genotypes at six polymorphic loci coding for soluble enzymes, of 25 total loci assayed, were determined using starch gel electrophoresis. The polymorphic loci examined were those encoding for (alpha)-L-amino peptidase (LAP), phosphoglucomutase (PGM), glucose-6-phosophate dehydrogenase (G6PDH), a non-specific esterase (Est) and two dipeptidases (L-leucyl-L-proline and L-phenylalanyl-L-proline dipeptidases). The genetic variability observed …

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A Study Of Reading Achievement In Terms Of Symbol Reversals In First Grade Children (Louisiana)., Bernard Leon Heydorn Jan 1983

A Study Of Reading Achievement In Terms Of Symbol Reversals In First Grade Children (Louisiana)., Bernard Leon Heydorn

LSU Historical Dissertations and Theses

This study was designed to investigate reading achievement in first grade children who are symbol reversers vs non-reversers and who are male vs female, and also to determine the effectiveness of a modification of the Kirshner Program (1977) in reducing symbol reversals. The sample was comprised of 115 first grade children in seven classes in two schools in East Baton Rouge Parish, Louisiana. The students were selected from a number of volunteer grade one classes on the basis of their being representative of the district at large in terms of racial composition and socioeconomic factors. The study used a randomized …

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Effects Of Friendship Skills Training In An Inpatient Alcoholic Population., Elaine Janis Salzer Jan 1983

Effects Of Friendship Skills Training In An Inpatient Alcoholic Population., Elaine Janis Salzer

LSU Historical Dissertations and Theses

The purpose of this study was to evaluate the effects of a friendship skills training program on an inpatient alcoholic population. Male veterans, who were inpatients of the Alcohol Dependency Treatment Program at a Veterans Administration Hospital, served as research subjects. The specific aims of this study were to determine if there were any differences between the experimental and control groups on (1) self-report of friendship attitudes, self perception of friendship skills, positiveness of verbal response choices; (2) observed interpersonal behavior changes (or affects) in-hospital; and (3) self-report of interpersonal contact and drinking behavior following hospital discharge. Forty-five male alcoholic …

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An Analysis Of The Trematode Fauna Of Two Intercontinental Migrants: Tringa Solitaria And Calidris Melanotos (Aves: Charadriiformes) (Ecuador, Louisiana, South Dakota, Canada)., Erika Jansic Tallman Jan 1983

An Analysis Of The Trematode Fauna Of Two Intercontinental Migrants: Tringa Solitaria And Calidris Melanotos (Aves: Charadriiformes) (Ecuador, Louisiana, South Dakota, Canada)., Erika Jansic Tallman

LSU Historical Dissertations and Theses

One hundred ninety-seven Solitary Sandpipers, Tringa solitaria, and 213 Pectoral Sandpipers, Calidris melanotos, were examined for trematodes. Specimens were taken from the hosts' winter range in Ecuador, South America, during the fall and spring migrations from Louisiana and South Dakota in the United States, and from the breeding grounds of the Solitary Sandpiper in Ontario, Canada. The 13 species of trematodes recorded from the shorebirds included 5 that were common to both species of shorebirds: Tanaisia fedtschnkoi, Cyclocoelum obscurum, Paramonostomum sp., Leucochloridium variae, and Zonorchis microrochis. Of the remaining 8 species, Cyclocoelum brasilianum, Plagiorchis maculosus, Stephanoprora denticulata, and Eurytrema lubens …

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Factors Associated With Research And Extension Work In Livestock Production In The Ivory Coast., Nathalie Zongo N'Guessan Jan 1983

Factors Associated With Research And Extension Work In Livestock Production In The Ivory Coast., Nathalie Zongo N'Guessan

LSU Historical Dissertations and Theses

The overall objective of this study was to gather basic information about livestock programs in the Ivory Coast, and to determine factors that may be impeding the successful accomplishment of these programs. One hundred and two livestock producers were interviewed--72 who were members of SODEPRA and 32 who were not. The data from the field study were coded onto computer sheets and transferred to punched cards and percentages and Chi-Square Values were calculated. The major dependent variable, membership in SODEPRA, was related to the independent variables in the study. Chi-Square values were used to determine if there was a significant …

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Magnetic Susceptibility Of Nickel., Arun Kumar Chatterjee Jan 1983

Magnetic Susceptibility Of Nickel., Arun Kumar Chatterjee

LSU Historical Dissertations and Theses

Using density and functional theory, expressions for the longitudinal and transverse spin susceptibility of ferromagnetic metals have been derived in the local density approximation. The self consistent calculation of these susceptibilities necessitates the inversion of some infinite dimensional matrices, which have been done analytically using tight binding wave function for the 3d electrons. This amounted to a transformation from a Fourier representation to an orbital representation. This method is then applied for nickel using a semi-empirical band structure. In the light of these approximations it proved worthwhile to introduce some adjustable parameters to describe the electron interactions. In the transverse …

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Roland Q. Leavell: A Biography (Mississippi)., Mary D. Leavell Bowman Jan 1983

Roland Q. Leavell: A Biography (Mississippi)., Mary D. Leavell Bowman

LSU Historical Dissertations and Theses

Roland Quinche Leavell was born on December 21, 1891, as the eighth of nine boys to conservative, religious parents in Oxford, Mississippi. Raised in Oxford, he followed his mother's wishes and entered the ministry of the Southern Baptist Convention. As a pastor, he not only served well in a number of churches, but became renowned throughout the Convention for his success in evangelism. Because of this success, he won appointment to two of the most prestigious offices in the Convention: Director of Evangelism and president of the Baptist Theological Seminary in New Orleans. This dissertation is not, however, simply a …

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The Methodological Foundations Of Law And Economics., Will Carrington Heath Jan 1983

The Methodological Foundations Of Law And Economics., Will Carrington Heath

LSU Historical Dissertations and Theses

Today there is a burgeoning "new" law and economics literature which extends the application of economic principles virtually across the board. The essence of the "new" law and economics is value (or wealth) maximization, which means exploiting economic resources in such a way that value--human satisfaction as measured by willingness and ability to pay--is maximized. Value maximization has become essential in both explanative and reformative analyses of the law. This new science of law is not without its critics. They include economists, especially those of the Austrian and American Institutionalist schools, as well as various legal theorists and practitioners not …

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Survival Of Vibrio Cholerae, Biotype E1 Tor, Serotype Inaba In Seafoods., Arthur Hinton Jr Jan 1983

Survival Of Vibrio Cholerae, Biotype E1 Tor, Serotype Inaba In Seafoods., Arthur Hinton Jr

LSU Historical Dissertations and Theses

The D values of Vibrio cholerae in oyster and shrimp meat homogenate were determined at 49(DEGREES), 54(DEGREES), 60(DEGREES), 66(DEGREES), 71(DEGREES), 77(DEGREES), and 82(DEGREES)C. In oyster homogenates, the D values in minutes were 4.7 at 49(DEGREES)C, < 0.35 at 54(DEGREES)C, < 0.35 at 60(DEGREES)C, < 0.33 at 66(DEGREES)C, < 0.30 at 71(DEGREES)C, < 0.29 at 77(DEGREES)C, and < 0.24 at 82(DEGREES)C. In shrimp homogenates, the D values in minutes were 9.17 at 49(DEGREES)C, < 0.43 at 54(DEGREES)C, < 0.39 at 60(DEGREES)C, < 0.32 at 66(DEGREES)C, < 0.31 at 71(DEGREES)C, < 0.30 at 77(DEGREES), and < 0.28 at 82(DEGREES)C. Whole oysters, inoculated with 10('6) V. cholerae/gram, were cooked in boiling water (100(DEGREES)C) or in hot oil (191(DEGREES)C) for one minute. Whole shrimp, inoculated with 10('6) V. cholerae were cooked in boiling water (100(DEGREES)C) or in steam (100(DEGREES)C) for 10 minutes. Vibrio cholerae was not isolated from the cooked oysters or shrimp. Sterile and unsterile shrimp, oyster, crab, and crayfish meat homogenates were inoculated with 10('7) V. cholerae/g. The homogenates were treated with 0, 25, 50, or 100 krad and stored at 4(DEGREES), 0(DEGREES), or -8(DEGREES)C for 21 days. No V. cholerae were isolated from any of the homogenates treated with 100 krad. Vibrio cholerae was able to survive longer in the sterile oyster, crab and crayfish homogenates stored at 4(DEGREES) and 0(DEGREES)C than in the unsterile homogenates stored at the same temperatures. The organism was able to survive longer in the unsterile shrimp homogenates stored at 4(DEGREES) and 0(DEGREES)C than in the sterile homogenates stored at the same temperature. At -8(DEGREES)C, survival time was usually longer in the unsterile seafood homogenates than in the sterile seafood homogenates stored at -8(DEGREES)C. Due to the retardation of competitive inhibition the organism was usually able to survive longer in the unsterile homogenates stored at -8(DEGREES)C than in the unsterile homogenates stored at 4(DEGREES) or 0(DEGREES)C.

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Some Effects Of Calcium On Growth, Yield And Mineral Content Of Pepper (Capsicum Annuum L.)., Patrick Emeka Igbokwe Jan 1983

Some Effects Of Calcium On Growth, Yield And Mineral Content Of Pepper (Capsicum Annuum L.)., Patrick Emeka Igbokwe

LSU Historical Dissertations and Theses

Two different greenhouse experiments were conducted to determine the effects of sources and levels of Ca on the growth, yield and mineral contents of bell pepper (Capsicum annuum L.) cv. 'Keystone Resistant Giant #4' grown on Cahaba silt loam. The CaCO(,3) produced plants that had significantly better growth, greater yield and higher nutrient uptake than did the control plants during the spring, summer and fall tests. Quality of growth, earliness of flowering and fruit development were better during the fall plantings for all treatments. The Ca(NO(,3))(,2) favored more vegetative growth on short internodes during the summer planting. Although a general …

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Impact Outcome At River Region Personal Growth Program., Mark Christopher Michael Jan 1983

Impact Outcome At River Region Personal Growth Program., Mark Christopher Michael

LSU Historical Dissertations and Theses

The River Region Personal Growth Program is a preventive mental health organization. Through education, River Region attempts to assist individuals in crisis, to build competency to avoid future crises, increase personal growth, and to channel persons who are in need into other formal mental health care. This study proposed to investigate the impact River Region has upon its participants compared to waiting list controls. Individuals' utilization of formal mental health services following participation was charted, as well as their absence from work. In addition, the Profile of Mood States and four scales from the Vocational Preference Inventory were administered to …

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The Effect Of Gypsum Amendments On The Displacement Of Exchangeable Aluminum From Acid Bt Horizons., Charles Kanmu Mulbah Jan 1983

The Effect Of Gypsum Amendments On The Displacement Of Exchangeable Aluminum From Acid Bt Horizons., Charles Kanmu Mulbah

LSU Historical Dissertations and Theses

Two acidic silt loam soils, Beauregard and Gigger were used in a study involving Ca movement and Al displacement from 15.2 cm laboratory soil clumns. Each column was uniformly packed to the appropriate bulk density. The top 5.1 cm portion of each column contained soil pre-mixed with powdered gypsum at rates of 0, 1 and 2 equivalents of the exchangeable Al. Calcium movement and Al displacement in the soil columns were accomplished by applying distilled-deionized water at a constant flow rate and the effluent was analyzed. In addition, a pulse containing dissolved gypsum at the rate of 4 Al equivalents …

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Computer Analysis Of Coastal Ocean Features In Synthetic Aperture Radar Imagery (Japan, Gotoh Islands)., Gary Arthur Mastin Jan 1983

Computer Analysis Of Coastal Ocean Features In Synthetic Aperture Radar Imagery (Japan, Gotoh Islands)., Gary Arthur Mastin

LSU Historical Dissertations and Theses

A wide variety of oceanographic phenomena is revealed in synthetic aperture radar (SAR) ocean imagery. Four basic classes of SAR oceanographic phenomena, surface waves, fronts, wind patterns and internal waves, are of oceanographic interest. These classes are defined in light of their generation mechanisms and as a function of Bragg scattering, which accounts for their visualization in SAR ocean imagery. Digital exploitation of SAR imagery offers image enhancement and parameter extraction capabilities and is currently an area of extensive research. The state of the art in digital exploitation of SAR imagery is reviewed, with special attention to SAR speckle reduction …

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A Descriptive Evaluation Of Two Hospital Education Programs (Louisiana)., Thomas Curtis Whitesell Jan 1983

A Descriptive Evaluation Of Two Hospital Education Programs (Louisiana)., Thomas Curtis Whitesell

LSU Historical Dissertations and Theses

The purposes of this study were to develop a method of assessment of the education function for hospitals and to ascertain if there was a significant difference in the education function of two like-size hospitals. One hospital is military, U.S. Army Community Hospital located at Fort Polk, Louisiana, and the other is civilian, Baton Rouge General Hospital, located in Baton Rouge, Louisiana. These two hospitals were selected for this study because of their similarities in size, state, educational mission and, most important, because of their organization for education. Both hospital education programs are decentralized, having a staff development section and …

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The Effect Of Feedback Frequency On Performance In Applied Behavior Analysis: A Field Study., Jagdeep Singh Chhokar Jan 1983

The Effect Of Feedback Frequency On Performance In Applied Behavior Analysis: A Field Study., Jagdeep Singh Chhokar

LSU Historical Dissertations and Theses

Occupational safety continues to be a major social concern in spite of the attention which it has received over the years. While unsafe acts and behaviors have been major contributors to accidents, the attention paid to increasing safety by changing human behavior has only been sporadic. This study used an applied behavior analysis package of training, goal setting, and feedback as a behavioral approach to improving safety in an industrial setting. In addition, the effects of changing the frequency of feedback on safe behavior performance were investigated. All the employees in a plant engaged in the manufacture and repair of …

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Geodetic Graphs And Convexity., Michael Franklyn Bridgland Jan 1983

Geodetic Graphs And Convexity., Michael Franklyn Bridgland

LSU Historical Dissertations and Theses

A graph is geodetic if each two vertices are joined by a unique shortest path. The problem of characterizing such graphs was posed by Ore in 1962; although the geodetic graphs of diameter two have been described and classified by Stemple and Kantor, little is known of the structure of geodetic graphs in general. In this work, geodetic graphs are studied in the context of convexity in graphs: for a suitable family (PI) of paths in a graph G, an induced subgraph H of G is defined to be (PI)-convex if the vertex-set of H includes all vertices of G …

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Effects Of Teachers' Use Of Mastery Learning Techniques On The Minimum Competency Test Performance Of Rural Second-Grade Students (Louisiana)., Betty Becker Gatipon Jan 1983

Effects Of Teachers' Use Of Mastery Learning Techniques On The Minimum Competency Test Performance Of Rural Second-Grade Students (Louisiana)., Betty Becker Gatipon

LSU Historical Dissertations and Theses

This study tested the effects of having teachers use mastery learning techniques in preparing rural second-grade students for the Louisiana minimum competency test. Experimental teachers were trained in the use of mastery learning and assisted in planning instruction that applied the strategies, particularly formative testing and corrective teaching. Each skill in the Louisiana minimum competency curriculum was taught by the regular classroom teacher, according to the Louisiana Basic Skills Test Specifications: Grade 2. Initial instruction was similar in methods and materials in all classrooms as was time spent on instruction. Experimental teachers concluded each lesson with a formative test. Corrective …

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A Study Of Several Macrocyclic Beta-Ketoamines And Their Metal Chelates., Charles Louis Modenbach Iii Jan 1983

A Study Of Several Macrocyclic Beta-Ketoamines And Their Metal Chelates., Charles Louis Modenbach Iii

LSU Historical Dissertations and Theses

Two new series of macrocyclic (beta)-ketoamines and several of their metal chelates have been prepared and characterized by infrared spectroscopy, nuclear magnetic resonance spectroscopy, mass spectrometry, and elemental analysis. The two series of (beta)-ketoamines are of type: and. where n = 3,6,7, and 10. They were prepared by reaction of macrocyclic (beta)-diketones with ammonia or ethylenediamine. These compounds were found to exist predominantly in the ketoamine form. A survey was conducted to determine the metal chelation behavior of the macrocyclic (beta)-ketoamines and a few (beta)-ketoamines derived from acetylacetone. The metals and oxocations used in this study were Be(II), Mg(II), Al(III), …

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Age-Related And Seasonal Variation In The Sertoli Cell Population, Daily Sperm Production And Serum Concentrations Of Follicle-Stimulating Hormone, Luteinizing Hormone And Testosterone In Stallions, L. Johnson, D. L. Thompson Jan 1983

Age-Related And Seasonal Variation In The Sertoli Cell Population, Daily Sperm Production And Serum Concentrations Of Follicle-Stimulating Hormone, Luteinizing Hormone And Testosterone In Stallions, L. Johnson, D. L. Thompson

Faculty Publications

No abstract provided.

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Drug Effects On Repeated Acquisition: Comparison Of Cumulative And Non‐Cumulative Dosing, Donald M. Thompson, Joseph M. Moerschbaecher, Peter J. Winsauer Jan 1983

Drug Effects On Repeated Acquisition: Comparison Of Cumulative And Non‐Cumulative Dosing, Donald M. Thompson, Joseph M. Moerschbaecher, Peter J. Winsauer

Faculty Publications

Pigeons acquired a different four‐response chain each session by responding sequentially on three keys in the presence of a sequence of four colors. The response chain was maintained by food presentation under a fixed‐ratio schedule. Errors produced a brief timeout but did not reset the chain. Each day there were four 15‐minute sessions, with a 10‐minute intersession interval. Cumulative dose‐effect curves for phencyclidine, pentobarbital, and d‐amphetamine were obtained by giving an injection before each of the four sessions; successive injections increased the cumulative dose in equally spaced logarithmic steps. For comparison, non‐cumulative doses of each drug (i.e., doses not preceded …

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Statistical Mechanics Of Conformational Transitions In Biopolymers., Rachid Charbel Maroun Jan 1983

Statistical Mechanics Of Conformational Transitions In Biopolymers., Rachid Charbel Maroun

LSU Historical Dissertations and Theses

Recently extended theoretical methods and existent experimental methods have been employed for the determination of conformational-dependent properties of polymers of biological interest like synthetic polyamino acids, natural polypeptides and proteins. Calculation of theoretical properties, like for example average helical content and average helical length, as derived from the configuration partition function has been achieved by making use of the Rotational Isomeric State approximation through modifications and innovations of a nearest-neighbor interaction version of the Zimm-Bragg model of helix-coil transitions as presented in a matrix format suitable for use in an electronic computer. The scope of the theory allows for the …

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Chemical Modifications Of Condensation Polymers, Chloromethylation And Quaternization., Shih-Jen Wu Jan 1983

Chemical Modifications Of Condensation Polymers, Chloromethylation And Quaternization., Shih-Jen Wu

LSU Historical Dissertations and Theses

Chloromethyl methyl ether, 6, generated in situ by reaction of dimethoxymethane with acetyl chloride, was employed to chloromethylate condensation polymers containing oxy-1,4-phenylene repeat units, i.e. poly(oxy-2,6-dimethyl-1,4-phenylene), 3, polyarylether sulfone, 4, and acetylated phenoxy resin, 10. To minimize concomitant crosslinking, the optium reaction ratios are 20:1:0.1 for reagent 6 to polymer to SnCl(,4) catalyst. One chloromethyl group per activated aromatic ring could be introduced: the corresponding concentration of active sites were 5.8, 3.5, and 4.6 meq/g for derivatives of 3, 4, and 10, respectively. All of the derivatives were characterized by NMR, DTA, and TGA techniques. A model segment of polyarylether …

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