Physical Sciences and Mathematics Commons^™

Nmr Determination Of The Conduction-Electron Hyperfine Interaction In Crystalline Cdo, David C. Look

Physics Faculty Publications

Measurements of the Cd¹¹³ nuclear-spin-lattice relaxation time T₁ and Hall effect in crystalline CdO, a degenerate semiconductor, have yielded the contact hyperfine strength of the conduction electrons at the nuclei. The product T₁T=168 sec °K, independent of temperature T and frequency ν for T=1.4,4.2, and 77-350 °K, and for ν=2-10 MHz. Taking the carrier concentration N=2.6×10¹⁹ cm^-3 independent of temperature to within 3% at 4.2, 77, and 300°K, and using an effective electron mass m_e^*=0.2m_e, we calculate an averaged electron probability density at the nucleus, 〈|φ_F(0)|^{2 …}

Geology Of The Moose River And Roach River Synclinoria, Northwestern Maine, Arthur J. Boucot, Edward W. Heath

Maine Collection

Geology of the Moose River and Roach River Synclinoria, Northwestern Maine

by Arthur J. Boucot, with contributions by Edward W. Heath

Bulletin No.21, Maine Geological Survey

Department of Economic Development, Augusta, Maine (August, 1969).

Contents: Abstract / Introduction / Stratigraphy / Intrusive Rocks / Metamorphism / Structure / Large Scale Maps / Somerset Island / Lobster Island / Historical Geology / The Problem of Shell Beds / References / Appendix I /

The Fresnel Integrals, Jean Therese Powers

Master's Essays (1922 - )

In the study of complex analysis, and in particular in the area of complex integration, there arise a series of integrals whose evaluation require more than an thing else, a great deal of mathematical ingenuity. Among these classical integrals are two known as the Fresnel Integrals and it is the purpose of this paper to discuss one method of evaluation of this pair of functions.

Solid-Liquid Phase Equilibria Of The Sodium-Rubidium And Sodium-Potassium-Rubidium Alloy Systems, Chen-Chao Hsu

Theses and Dissertations

Thermal methods were used, to determine with high precision, the solid-liquid phase equilibria diagrams for the sodium-rubidium and sodium-potassium-rubidium systems. In the sodium-rubidium system, the results differ greatly from those of earlier works, especially near the eutectic composition where differences in freezing points as large as 25°K occur. A detailed search was made for possible intermetallic compounds (especially Na2Rb). Neither slow temperature cycling in the temperature range where compound formation could occur nor extended periods of annealing just above the eutectic temperature produced any evidence for compound formation in the sodium-rubidium system. A 2:1 (sodium to rubidium) sample was subjected …

A Kinetic Study Of The Oxidation Of The 2, 3, And 4 Pyridine Aldehydes By Cobalt (Iii) Perchlorate In Aqueous Solution., Ronald Barry Giuntoli

All Master's Theses

Cobalt(III) perchlorate has been shown to be a powerful oxidizing agent and kinetic investigations of the mechanism of oxidation of many organic compounds including organic acids have been performed.

The Mossbauer Effect In Ferric Stearate And Ferric Oleate, Ronald L. Wilson

Masters Theses

No abstract provided.

Estimations Of The Effective Electrolytic Surface Area Of Rough And Porous Silver Electrodes ; Ii. Potentiostatic Oxidation Of Silver In Alkaline Electrolyte, James Glenn Bearss

Theses and Dissertations

This dissertation is written in two sections. The first section deals with the development of methods for the estimation of the effective electrolytic surface area of rough and porous silver electrodes in alkaline electrolyte. Data are presented comparing the results of three different methods of surface area estimation. Model pore electrodes were also prepared and oxidized to study the reactions in a pore. Data for constant current oxidations of these electrodes is given. The second section deals with the potentiostatic oxidations of silver in alkaline electrolyte. Data are presented on the total charge acceptance versus applied potential for a potential …

Inelastic Deuteron Scattering From 151Eu, Gerald Ralph Boss

Masters Theses

No abstract provided.

The Attempted Synthesis Of Ethylenimine, Rabindranath Patnaik

Masters Theses & Specialist Projects

The object of this investigation was to study the homogeneously catalyzed reaction of acetylene and ammonia and particularly to attempt to synthesize ethylamine by the reaction of acetylene and ammonia.

Homogenous Catalytic Hydrogenation Of Organic Compounds Using Rhodium-Triarylphosphine Complexes, Jack Lee Parsons

Dissertations

Introduction

The purpose of this research was to study the homogeneous catalytic hydrogenation of α,β-unsaturated organic compounds containing a wide variety of reducible functional groups. The catalysts to be used were rhodium complexes of triarylphosphines. It was also desired to develop these catalytic systems into practical synthetic methods for the reduction of unsaturated compounds.

On The Theory Of Quaternions, Earle David Smith

All Master's Theses

Ordered triplets serve to describe space geometrically just as ordered pairs serve to describe the plane. A multiplication can be defined on pairs consistent with the complex numbers. However, as this paper will show, one cannot define a multiplication on triplets which is consistent with the complex numbers.

The Effects Of Herbicides On Three Soil Inhabiting Blue Green Algal Species, Lee C. Darlington

All Master's Theses

The object of this study was to examine the effects of varying concentrations of 2, 4-D, Dalapon, and Tordon on the growth of several nitrogen-fixing blue-green algal species obtained from soil samples and grown under culture conditions in the laboratory.

A Thermodynamic Approach To The Study Of Phase Equilibria In The Sodium-Potassium Alloy System I. The Phase Diagram For Nak At Atmospheric Pressure ; Ii. High Pressure Phase Studies, Donald Ray Anderson

Theses and Dissertations

Ultra-pure reagents, platinum resistance thermometry and modern inert atmosphere glove box facilities have made possible a detailed examination of the NaK system at atmospheric pressure. A thermoanalytical study of solid-liquid phase equilibria in the NaK alloy system was conducted in the tetrahedral press to 55 kbars to investigate possible intermediate compound formation and shifting of the invariant points at various pressures. An expected shift in the eutectic composition to lower potassium content with an increase in the halt temperature on increasing pressure was confirmed. A merging of the meritectic and eutectic points at 343 ±2°K and 37 ±3 kbars occurred …

A Study Of Folic Acid Dependent Reactions In Bovine Brain, Dillard Spencer Broderick

Theses and Dissertations

The enzymatic interconversion of serine to glycine and N5, N10-methylene tetrahydrofolate to N5 -methyl tetrahydrofolate have been studied in a cell-free system derived from bovine brain. A partial purification of serine transhydroxymethylase and N5, N10 -methylene tetrahydrofolate reductase has been achieved by ammonium sulfate fractionation, protamine sulfate fraction, and by various column chromatography procedures. The two enzymes studied catalyze sequentially the reductive transfer of the hydroxymethyl group of serine to the N5 position of tetrahydrofolate forming N5 -methyl tetrahydrofolate. The products of these reactions were assayed by the incorporation of C14 from a one-carbon precursor i.e., L-beta-(C14)-serine, or N5 -methyl …

The Catalytic Hydrogenation Of Benzodiazines.|Ni.|Pphthlazine.|Nii.|Pquinazoline, Danny Lee Elder

Theses and Dissertations

Quinazoline and phthalazine were hydrogenated at low pressure and temperature (60 psi, room temperature) and high pressure and temperature (2000 psi, 100°C, 150°C} in neutral and acidic solvents over 5% Pd/C, 5% Ru/C, 5% Rh/Al2O3 , 5% Rh/C, and 5% Pt/C. Chromatographic methods for determining the qualitative and quantitative composition of hydrogenation mixtures were developed. The compositions of quinazoline and phthalazine-hydrogenation mixtures were determined. Eight phthalazine-hydrogenation products were detected and isolated: (1) 1,2-dihydrophthalazine, (2) 1,2,3,4-tetrahydrophthalazine, (3) a,a'-diamino-o-xylene, (4) o-methylbenzylamine, (5) 1,3-dihydroisoindole, (6) o-xylene, (7 and 8) cis- and trans- 1,2-dimethylcyclohexane. These products were identified by isolating them from reaction mixtures …

Thermodynamics Of Proton Dissociation And Metal Ion Complexation In Aqueous Solution. I, Cation Binding With Cyclic Polyethers: Significance In Ion Transport Processes. Ii, Proton Dissociation From Adenosine, Several Monosaccharides And Related Compounds. Iii, Proton Dissociation From Several Pyrimidines And Their Nucleosides At 10, 25 And 40°, Joseph Howard Ryttling

Theses and Dissertations

The log K, ΔH° and ΔS° values for the interaction of several metal ions with the two isomers of the cyclic polyether, 2,5,8,15,-18,21 hexaoxatricyclo[20.4.0.0^9,14]hexacosane are reported. The stability order found for alkali metal ion interaction with either isomer is identical to the order of ion permeability through reconstituted biological membranes for structurally related antibiotics. The size of the metal ion is critical in determining the extent of interaction. A calorimetric titration study of proton ionization from several monosaccharides and derivatives, pyrimidine bases and their nucleosides, adenosine and its derivatives, and cycloheptaamylose is described. The heats of reaction obtained in this …

Angular Correlation Of Positron Annihilation Radiation In Damaged Nickel And Iron, Hsien Chen Huang

Masters Theses

No abstract provided.

The Elastic Scattering Of 1.33 Mev Gamma Rays From Tin, J. Edward Terdal

Masters Theses

No abstract provided.

The Wittig Reaction Of Stabalized Phosphonium Ylids With Derivatives Of D-Ribose, George Robert Wellman

Masters Theses

No abstract provided.

Mechanism Of Water Transport Through Reverse Osmotic Membranes, Cheryl Kay Murphy

Theses and Dissertations

Cellulose acetate membranes show a higher permeability to water than to salt and are being used for desalination of salt water by reverse osmosis. Use of highly acetylated cellulose membranes give a higher salt rejection but also decrease flow rate of the water. The addition of very-short-chain substances or alkyl groups larger than one carbon atom to the cellulose membrane also decreases water flux. A proposed mechanism of transport through the membrane is that the water molecule is passed along the chain by hydrogen bonding with the acetyl groups, The NMR shows a change in the chemical shift of water …

Standing Waves On The Moon, Lewis T. Chadderton, Frans G. Krajenbrink, Robert Katz, Arcadio Poveda

Robert Katz Publications

The existence of local annular and radial structures in the environment of lunar craters, and of a global selenographic tectonic pattern, is ascribed in part to standing “moonquakes” established after impact or eruption.

A Calculation Of Photodetachment From Molecular Oxygen, Raymond Pollock Jr.

Physics & Astronomy ETDs

The problem of photodetachment from homonuclear diatomic mole­cules is treated theoretically, with the aim of providing a calcula­tion of photodetacbment from the molecular oxygen ion. Using a two­-center (spheroidal) coordinate system a one-electron model including direct coulomb, polarization, and approximate exchange interactions is developed, and formulas for scattering and photodetachment cross section are derived. Wave functions representing both bound and free electrons in the field of the neutral molecule are calculated numerically, using adjustable parameters in the exchange and polarization potentials to attain the proper binding energy. The photodetachment cross section is then computed from these wave functions, along with …

Water Resources News, Volume 1, No. 3, July 1969

Water Current Newsletter

Evapotranspiration Seminar
Legislation of Interest
Publicatons of Interest
Data Bank Bill Passed
Phreatophyte Research Grant Obtained
OWRR Fiscal Year 1970 Title II Program
Research Review

Technical Assistance To The Commerical Fisheries Statistics Project Of Puerto Rico (Final Report)., Charles W. Caillouet, James B. Higman

RSMAS Technical Reports

In the first fiscal year of this project, the Institute of Marine Sciences, University of Miami, Florida, and the Department of Agriculture, Commonwealth of Puerto Rico, under Public Law 88-309, began development of a program of continuous collection of statistical information on the quantity and value of landings of commercial marine fishes and shellfishes from Puerto Rican coastal waters (Caillouet, Garcia and Higman, 1968).

New Phylogenies Of The Lower Organisms: Possible Relation To Organic Deposits In Precambrian Sediment, Lynn Margulis

Lynn Margulis (1938 - 2011)

Classical phylogenies of the lower organisms are based on assumptions recently claimed to be erroneous. Alternative assumptions, more consistent with modern genetic and biochemical data, lead to the construction of new phylogenies. The new phylogenies (one for prokaryote organisms and one for eukaryotes) based on the symbiotic theory of the origin of eukaryotic organelles predict the nature and sequence of organic deposits on the Precambrian earth. Even if incorrect, these phylogenies present a modern framework upon which to compare the many recent reports of organic remains in sediment.

Terminal Talk - The Wofford Connection - July 1969, Wofford College Computer Center

Terminal Talk

No abstract provided.

Generalized Threshold Decoding Of Convolutional Codes, Luther D. Rudolph

Electrical Engineering and Computer Science - Technical Reports

It is shown that any rate l/b systematic convolutional code over GF(p) can be decoded up to its minimum distance with respect to the decoding constraint length by a one-step threshold decoder. It is further shown that this decoding method can be generalized in a natural way to allow “decoding” of a received sequence in its unquantized analog form.

An Attempt To Measure The Diffusion Of Aluminum Into Natural Aluminum Oxide, Charles Edward Galaspie

Master's Theses

The goal of this research was to investigate the diffusion of aluminum ions in natural aluminum oxide grown under atmospheric conditions. The basis for the approach employed here had been developed earlier by J. H. Christian and H. L.Taylor. However, these authors studied the diffusion of aluminum ions in an oxide grown in a pure oxy­gen atmosphere. They utilized a glass slide upon which aluminum metal was deposited in vacuo (10^-11 Torr). Oxide was then allowed to grow on this metal by back-filling the vacuum with pure oxygen to a pressure of 40 to 50 m Torr while infrared …

Peracid Oxidation Of 3-Phenylindene, Christopher Peter Johnson

Master's Theses

Indene oxide (indan, 1,2-epoxy; indene 2,3-oxid is first recorded in the literature in 1919. This compound was formed in practically quantitative yield by the treatment of indene bromo­ hydrin in ether with powdered potassium hydroxide. At this time Van Loon also reported the preparation of indene oxide by mechanical shaking of an anhydrous, ethere!al solution of the bromohydrin with finely powdered potassium hydroxide. The desired product was obtained in a 92-97% yield by this method. Indene oxide has been prepared in a similar manner from trans-2-chloro-l-indanol by treatment "with soda," distillation of the acetone in vacuo after 15 hours, and …

A Thermogravimetric Study Of Polyvinylidene Chloride In Polymers, Charles Edward Singleton

Master's Theses

In the manufacturing of thin films such as cellophane, polymers employed as coatings greatly improve film functionality. Polymers such as polyvinylidene chloride, polyvinyl chloride, polyvinyl acetate and many others are used as coatings or components of coatings designed to improve the functionality of a film. Selection of polymers with properties that will meet the requirements of the finished film product is a continuing process of film manufacturers. Physical and chemical characterization of the polymer along with coating functionality are the factors involved in the selection. Chemical composition is the most important factor affecting polymer characteristics and must be known if …