Physical Sciences and Mathematics Commons^™

Host And Prophage Modifications Of Ultraviolet Induction In Salmonella Potsdam, Bela B. Toth

Loma Linda University Electronic Theses, Dissertations & Projects

In induction experiments with naturally occurring and artificially lysogenic strains of S. potsdam, cells were irradiated in buffer, transferred to complete medium, and then assayed for free phage. Irradiation was followed by half hourly samples for free phage from the growing populations of irradiated cells. For an estimation of burst sizes, the irradiated cells were diluted out to a final concentration of 1 cell per ml and distributed to tubes in 0.5 ml quantities. All assays were done by the top-layer method with streptomycin incorporated in the top-layer and SP2-str^r as the bacterial indicator. The non-lysogenic strain S. …

The Fecal Shedding Of Listeria Monocytogenes By Conventional And "Germ Free" Mice, Margaret Joyce Ramsay

Loma Linda University Electronic Theses, Dissertations & Projects

A series of experiments involving Listeria monocytogenes was undertaken to study first the fecal shedding of Listeria by conventional mice challenged intraperitoneally with Listeria and second the fecal shedding and ability to survive of germ free mice with similar challenge. In addition, mites infesting Listeria infected mice were cultured for their possible contamination by Listeria.

Conventional mice were challenged intraperitoneally with a single near LD₅₀ dose of Listeria. Fecal Listeria were detected by collecting specimens from each mouse daily for the first 4 days and every second day thereafter. The feces was held at 7°C for 14 …

Deer And The Ainsworth Canal, Karl E. Menzel

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

Merritt Dam and the Ainsworth Canal were constructed by the Bureau of Reclamation to provide irrigation water for the vicinity of Ainsworth in north central Nebraska. The reservoir was completed in 1964 and at capacity has an area of 2,906 surface acres. The canal commences at the Dam, 27 miles southwest of Valentine, and extends eastward for 52.8 miles to Highway 20 east of Johnstown. The canal, along with 174 miles of laterals and 63 miles of drains, serves to irrigate about 34,000 acres of farmland.

The Ainsworth Canal is lined with concrete along its entire length. In the western …

Publications Of The Mineral Research And Exploration Institute Of Turkey, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Yeni̇ Neşri̇yat, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Mohole» Projesi̇ Ve Uygulanmasi *, Muammer Çeti̇nçeli̇k

Bulletin of the Mineral Research and Exploration

No abstract provided.

Gedanken Über Die Entstehung Der Erde Und Des Lebens, Hartmann Wedding

Bulletin of the Mineral Research and Exploration

No abstract provided.

Geologische Und Hydrologische Untersuchungen Im Gebiet Der Thermalquellen Von Hi̇saralan (Westanatolien), Ch. J. Hâfeli

Bulletin of the Mineral Research and Exploration

No abstract provided.

8th Annual Meeting Rocky Mountain Spectroscopy Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 8th annual meeting of the Rocky Mountain Spectroscopy Conference, sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, August 8-9, 1966.

Observations Sur Un Gisement De Latérite Près De Gökçeovacik Köy (Sw De La Turquie), S. Ayrton, J. P. Vernet, R. Woodtli

Bulletin of the Mineral Research and Exploration

Des lentilles de matériel latéritique de caractère souvent pisolithique, formées au cours de l'Oligocène, épousent une morphologie karstique née et creusée dans les calcaires de l'Eocène, où un organisme cavernicole, Microcodium, s'est largement développé. Le tout a été recouvert par les premiers niveaux du Miocène, dont l'analyse paléontologique est également donnée. L'étude minéralogique du gisement a révélé la forte prédominance de la kaolinite par rapport aux autres minéraux, en particulier l'hématite.

Zur Geologie Und Metallogenese Des Gebietes Zwischen Yahyali (Kayseri̇) Und Zamantifluss, K. Vohryzka

Bulletin of the Mineral Research and Exploration

No abstract provided.

A Propos D'Un Cas De Schizogonie Dans Un Individu D'Orbitoides Media D'Archiac, Engin Meri̇ç

Bulletin of the Mineral Research and Exploration

No abstract provided.

Sur L'Existence De Roches A Diaspore Dans La Région De Muğla, Sw De La Turquie, S. Ayrton, J. P. Vernet, R. Woodtli

Bulletin of the Mineral Research and Exploration

No abstract provided.

Analyse Sporopollinique Des Lignites Éocènes De Sorgun (Yozgat - Turquie), Eran Nakoman

Bulletin of the Mineral Research and Exploration

No abstract provided.

The Significance And Distribution Of Glaucophane Rocks In Turkey, G. V. D. Kaaden

Bulletin of the Mineral Research and Exploration

No abstract provided.

The Significance Of The Geologic Time Factor In Metallogeny And Petrology, Mehmed Ramoviç

Bulletin of the Mineral Research and Exploration

No abstract provided.

Tb23: Studies Concerning The Retention Of Organic Materials By Clays, David C. Frost, Harold W. Gausman

Technical Bulletins

The purpose for conducting this research reported was to investigate interlattice adsorption of organic materials by montmorillonite clay and clays obtained from Merrimac sandy loam and Suffield silt loam soils.

A Method For The Determination Of Trace Metals In Carbon By Atomic Absorption Spectroscopy, Leo Francis Meyer

Master's Theses

The object of this research was to develop an accurate, rapid and economical method for determining trace amounts of metals in carbons, especially in activated carbons designed as gas adsorbents. More specifically, the investigation was directed primarily to the determination of K, Ca, and Fe in Carbons

Geology Of Eastern And Southeastern Anatolia (Part Ii) *, İ. Enver Altinli

Bulletin of the Mineral Research and Exploration

No abstract provided.

Synthesis Of A Substituted Tetrahydropyrimidopyrimidine, Jack Lee Parsons

Masters Theses

Introduction

The purpose of this research was to develop a generalized synthesis of substituted tetrahydropyrimidopyrimidines. It was also of interest to prepare related compounds for the purpose of structure determination.

We were interested in tetrahydropyrimidopyrimidines as possible folic acid antagonists.

Studies On The Preparation Of Tetrasubstituted Hydrazones, William Kao

Masters Theses

Introduction

In a recent study of the ultraviolet spectra of substituted hydrazones, it was concluded that a sterio effect existed in tetrasubstituted hydrazones that significantly hindered complete rotation about the nitrogen-nitrogen bond. Weber¹⁶ noted that di- and tri-substituted hydrazones exhibited similar spectra with three strong absorption bands at approximately 235, 300, and 340 mu. In acid solutions, the spectra of these compounds showed a marked decrease in intensity of the long wavelength band. It has been postulated that this change was a consequence of the protonation of the non-bonding electron-pair on the amino nitrogen atom, and thus correlated the …

The Application Of The Verwey-Overbeek Theory To The Relative Sediment Volume Of Kaolin-Water Dispersions, James E. Kline

Masters Theses

Introduction

This paper describes an investigation intended to: 1. observe the effect of electrolyte concentration on the stability of kaolin-water systems, 2. evaluate the relative sediment volume measurement as a tool for determining the stability of such systems, 3. assess the applicability of the Verwey-Overbeek theory of stability of lyophobic colloids for predicting the observed effects, and 4. determine if any correlation exists between the effects predicted by the theory and observed through the relative sediment volume measurement.

The relative sediment volume measurement will be shown to be dependent upon the efficiency of packing of the pigment particles, which in …

An Investigation Of The Surface Temperature Distribution In The Detroit Region, Allen R. Smith

Masters Theses

Chapter I

Introduction

Climate and the City

Studies made of temperature in and around cities have shown the climate of the city to be anomalous in relation to its regional climate. The extent of this anomalous condition and the reasons for its occurrence vary from city to city and from season to season. So many variable factors are present in the generation or regeneration of heat within the city that no study has yet satisfactorily explained the total factors involved, or has indicated the percentage for which any one factor might be responsible. This being the case, the only objective …

Dimethyl Sulfoxide Oxidation Of Primary Alcohols, Carmen Vargas Zenarosa

Masters Theses

Historical

A method of selective oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones has been developed recently, namely the use of dimethyl sulfoxide (DMSO) as the oxidizing agent, either alone or with dicyclohexylcarbodiimide (DCC)¹⁴, acid anhydrides¹, or alkyl chloroformates¹⁰. The negatively polarized oxygen atom of the sulfoxide group in DMSO is ideally situated for a transfer to many electron-deficient substrates. The oxygen of the alcohol coordinates with the sulfur atom of DMSO through its oxygen atom; this is followed by β-elemination of dimethyl sulfide, thereby resulting in oxidation of the …

Isolation Of A Toxic Substance From Centaurea Repens, Merton E. Sprengel

Loma Linda University Electronic Theses, Dissertations & Projects

A poisonous steroid-type compound was isolated from Centaurea repens. After extraction with absolute ethanol, removal of the solvent, addition of 2% HCl to precipitate the pigments, and filtering, the pH was adjusted to 9 with aqueous anunonia. This solution was exhaustively extracted with chloroform, evaporated to dryness, and extracted with ethyl ether.

This fraction was chromatographed on silica-gel plates, using 10:1 1,2-dichloroethane-methanol as the developer. The band at Rf 4.2 was removed and found toxic to mice. Labored, slow, gasping respiration and frequent involuntary muscular contractions became apparent within a few minutes following the intraperitoneal injection into each animal. Death …

Acquisition Of Health Knowledge In Selected Hong Kong Secondary Schools, Anne D. Lindt

Loma Linda University Electronic Theses, Dissertations & Projects

The exploratory survey method was used to determine the extent to whole scientific knowledge, related to principles and practices of healthful living, was enhanced during the secondary school education of students attending four Seventh-day Adventist secondary schools in Hong Kong. The tool, in the form of a health knowledge test designed to fit the cultural patterns of the population, was applied to 358 Form I (grade 7) and Form V (grade 11) students of the specified schools. Individual scores were computed and comparative analyses done on scores of groups of students representing the two different educational levels, sex differences, two …

Study Of Some Solutions Of The One-Electron—Two-Center Problem For Heteronuclear Cases, L.Y. Wilson, Gordon A. Gallup

Gordon Gallup Publications

The Schrödinger equation for two nuclei and one electron has been solved for the first eight σ states of the system HeH^{2 +} , He₂³⁺, LiH^{3 +} , and LiHe^{4 +} . The resulting solutions are described and some of their properties are discussed. ©1966 American Institute of Physics

Development, Verification, And Use Of Methods To Model Chemical And Thermal Processes Lakes Mead And Powell, Bureau Of Reclamation

Publications (WR)

PURPOSE

The purpose of the proposed research is to quantify the effects that Lakes Mead and Powell have on the salinity in the Colorado River system, and to evaluate changes that cap be made to the operating system of the reservoirs (within legal/institutional constraints) to enhance salt precipitation and/or minimize evaporation within the reservoirs. The effect of any changes (i.e., selective withdrawal uses, pumped storage, etc.) on reservoir evaporation could also be evaluated with a goal of minimizing evaporation. This will be accomplished through the development of a mathematical model of the reservoirs as described below.

BACKGROUND

Two major problems …

Potential Neoplasm Inhibitors Ii, Ronald Lee Floyd

Master's Theses

No abstract provided.

Self-Consistent-Field Calculation Of The Energy Of Heh +, Gordon A. Gallup, M.S. Mcknight

Gordon Gallup Publications

The use of the exact solutions of the one-electron—two-nucleus problem as a basis set of functions for SCF calculations is investigated for the HeH ⁺ ion. The calculations are made with both scaled and non-scaled functions. The best energy obtained here is –3.345 a.u. at an internuclear distance of 1.40 a.u. The conclusion is that these functions form an only moderately good basis set for such calculations. Their conditioning to the problem can only partially overcome their lack of completeness when continuum states are omitted. ©1966 American Institute of Physics