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The Syntheses And Ultraviolet Absorption Spectra Of 2-Imidazolines, 2-Imidazolidones And Imidazolidines, Robert J. Ferm

Chemistry and Chemical Biology ETDs

The first method used to prepare 2-imidazolines was through the reaction of aromatic aldehydes with ammonia. Amarin, which is known as 2,4,5-triphenyl-2-imidazoline, was the first compound reported to be prepared in this manner. This type of reaction has since been widely studied 2,3,4,5,6 in connection with the preparation of 2,4,5-triarylimidazolines. Furfural and ammonia have also been reported to react in a similar manner. Amarin has also been obtained from the reaction of a mixture of benzil, ammonia, and benzaldehyde.

The Preparation And Properties Of Aromatic Ditellurides, Roger Sanftner

Chemistry and Chemical Biology ETDs

It has been shown that tellurium tetrachloride combines additively with aliphatic others yielding hygroscopic compounds of the type R2O•TeCl4, but with mixed ethers, containing both alkyl and aryl radicals, substitution takes place with the elimination of hydrogen chloride.

The Chelation Of Praseodymium As A Function Of Ph Using Thenolytrifluoroacetone, Thomas K. Keenan

Chemistry and Chemical Biology ETDs

The rare earth elements, including elements 57 through 71, provide many diverse series of studies through their chemical reactions. In as much as these elements are all in Group III of the periodic table, they are markedly similar in their properties. The separation, insulation and purification of the various rare earths from one another has long been a problem of great interest to the chemist. All of these elements show a principle valence of plus three. Cerium has a well-defined plus four state, stable in aqueous solution and europium forms a stable, insoluable divalent sulfate. Those two exceptions, however, are …

A Study Of The Intermediary Products Formed During The Life Of A Copper Cyanide Plating Bath, Matthew E. Carlisle

Chemistry and Chemical Biology ETDs

Four aims of a study of cyanide baths were:

1. To study the intermediate products formed during the operation of plating and stripping baths under various conditions.

2. To identify these intermediate products or complexes and to determine whether or not they caused the failure of the bath.

3. To consider the conditions that caused a bath to fail, and to be able thereby to increase the life of the bath.

4. To develop a fast, accurate method for controlling the baths, preferably by means of the cyanide content.

The Use Of Ethyl 4,4-Dimethyl-1-Isopropyl-2-Imidazolinyl-2-Acetate In The Synthesis Of Some 2-Imidazolines, Jacob Shapira

Chemistry and Chemical Biology ETDs

The first recorded synthesis of a 2-imidazoline was reported in 1882 by Radziszewski who obtained what he thought to be 2,4,5-triphenyl-3-imidazoline by warming an alcoholic solution of benzoin, ammonia and benzaldehyde. ‘Amarine’, the common name for this compound, has been shown to be 2,4,5-triphenyl-2-imidazoline.

Microradiography With Biological Specimens, Arthur D. Wellman

Bachelors’ Theses

Microradiography is a technique in which X-rays are directed through a very thin specimen onto a fine-grained photographic film and the image examined under magnification. It has been used chiefly as a supplementary tool in industrial analysis of metal structures, and even in this field has attained prominence only within the past decade. Its usefulness is limited to fine structures (except where minute flaws or impurities are to be examined in a material), and its success is limited by the degree of clarity in the radiograph to be magnified.

Calibration Of An X-Ray Unit As To Effective Wave-Lengths By Comparing Absorption Coefficients, Jerome James Woyci

Bachelors’ Theses

The purpose of this paper is to determine by the mass absorption coefficients of various substances, namely, aluminum, copper and iron, the effective wave-length of an X-ray beam which passes through particular thicknesses of the above materials. Since an X-ray tube does not emit a monochromatic wavelength but emits heterogeneous wave-lengths, we had to use a comparative method in order to obtain the desired results. It happens that the mass coefficient of absorption of carbon does not vary appreciably with an increase or decrease in wavelength, hence, we can use carbon as our standard or material to which we can …

The Monadnock Volume 24, Number 2, May 1950, Clark University Geographical Society

The Monadnock (Clark Geographical Society)

Volume 24, Issue 2 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).

The Sixty-Second Session Of The Iowa Academy Of Science And The Seventeenth Convention Of The Junior Academy Of Science Of Iowa, April 21 And 22, 1950, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

It's Time To Take Stock

United States Environmental Protection Agency: Publications

Likening colleges and universities to the automobile industry may seem far-fetched, but is it? Each is engaged in fashioning and selling necessary products- one trained men, the other mechanical equipment. Both entered the post-war years with production at low ebb; unable to satisfy pent-up customer demands. Time and high-speed assembly lines have bridged the gap of gas buggy shortage. The impact of selective buying by a discriminating public is now real cause for concern among some of the motor moguls. Rumor has had it that schools teaching wildlife management are overproducing. We decided to gather facts and opinions at the …

Microorganisms And Soil Structure, T. M. Mccalla

Department of Agronomy and Horticulture: Faculty Publications

SUMMARY

Laboratory tests were made to determine the effectiveness of different compounds and microbial groups in increasing the stability of Peorian loess lumps against the action of falling water drops. The influence of these on percolation tests in the laboratory was also determined.

Many organic substances-dextrose, sucrose, starch, peptone, cullulose, and gum arabic-did not themselves contribute directly to soil-structure stability, though these substances do furnish energy material for soil microorganisms, which can convert them readily into either microbial tissue or decomposition products that increase soil-structure stability. Lignin, proteins, oils, fats, waxes, resin, and paraffin increased the stability of lumps of …

Public Health Reports, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Preliminary tests with DDT for the control of mosquitoes, forest insects, and agricultural pests demonstrated that it was toxic to a wide variety of animal life. Because there were indications that the new insecticide would be widely used, apprehension was expressed by some groups that its extensive or indiscriminate use would cause extensive harm to wildlife.

The desirability of carefully controlled use was early recognized by those in charge of extensive programs for the control of insects of public health importance. A joint statement of policy for the use of DDT issued early in 1945 (1) by the Army and …

An Ecological Study Of The Foraminifera Of Mason Inlet, North Carolina, Daniel N. Miller Jr.

Masters Theses

"Mason Inlet. North Carolina is a lagoonal marsh area with warm-temperate water, the salinity ranging from fresh to salt water. Nine collecting stations comprise an ecological gradient across the environment.

Forty-two species of foraminifera are recorded from the inlet, ranging in their affinities from brackish water to open-sea facies. Several extensions of range are recorded both northward and southward.

Substratum conditions apparently control the distribution of foraminifera within the inlet. Clean, fine sand provided the largest faunal populations. A depauperate assemblage was found in an inorganic, argillaceous substratum. The largest population of arenaceous forms was found at the channel through …

The Synthesis And Insecticidal Activity Of Some Halogenated Aromatic Ethers., Tien-Chih Chen

LSU Historical Dissertations and Theses

No abstract provided.

A Petrographic Study Of The Eocene Jackson Group Of Mississippi And Adjacent Areas., Ming-Shan Sun

LSU Historical Dissertations and Theses

No abstract provided.

The Species Concept: A Semantic Review, Benjamin H. Burma

Department of Earth and Atmospheric Sciences: Faculty Publications

In some respects, it is extremely unfortunate that names are ever attached either to ideas or objects. The false attachment of names to ideas or objects similar but not identical with the original can work harm far exceeding the benefits conferred by having a convenient label. The name "species" has come to such a state. As we shall see, a species, be it plant or animal, is a fiction, a mental construct without objective existence. Animal, and plant, lines of descent exist in a four-dimensional continuum. To set up species in this continuous line of descent, we must chop it …

Liquid Potassium Soaps From Coconut And Corn Oils, Jack R. Kaestner

Bachelors’ Theses

My interest in liquid potassium soaps began a number of years ago. At this time I was employed at a company that manufactured various cleaning preparations, one of these being a liquid soap prepared by the interaction of potassium hydroxide and cocoanut oil. It was there that I first became acquainted with techniques and problems encountered in the soap industry.

The above mentioned notes took place during the middle of World War II, and consequently the author became familiar with some of the different fats and oils that were substituted for the then unavailable Philippine coconut oil. All of the …

The Possibility Of Using Gelatin As A Substrate In Determining The Effect Of Ph On The Activity Of Hyaluronidase, Robert P. O'Driscoll

Bachelors’ Theses

The aim of this research is as follows:

1. To determine the feasibility of using gelatin as a substrate for hyaluronidase.
2. To determine the optimum pH for the enzyme acting upon a gelatin substrate.
3. To determine qualitatively and quantitatively if reducing sugars are present in the substrate after action by the enzyme.

The work on hyaluronidase is relatively new. However it is the most extensively studies mucolytic enzyme.

A Study Of Magnesium Silicate As A Base Matrix Material For Fluorescent Materials, John D. Hopperton

Chemistry and Chemical Biology ETDs

Luminescent materials have come into wide and important use within the past ten years in such equipments as the fluorescent lamp, and the cathode ray television tube. Because of this wide interest and usage, there has been made a concentrated search for ever brighter luminescent materials. It has also been of importance to produce and investigate materials which would produce as a wide range of colors under excitation as possible.

An Investigation Of The Dissociation Of Certain Cyclohexane Derivatives Of Aliphatic Acids, Jack Norman Finch

Master's Theses or Doctor of Nursing Practice

For years it has been known that certain cyclic derivatives of aliphatic acids show hormone activity as growth regulators for some plants, and popular acceptance and application of the regulators has been remarkably rapid. Two commercially available growth regulating substances are indoleacetic acid and phenylacetic acid. Others also include indolebutyric acid and naphthaleneacetic acids (13). There are also certain phenoxy derivatives of acetic acid such as 2,4-dichlorophenoxy acetic acid (commonly called 2,4 D), which have specific destructive effects to growing plants. Many derivatives of phenoxyacetic acid have been prepared, their physical properties determined, and an attempt made to correlate molecular …

The Sixty-First Session Of The Iowa Academy Of Science, April 15 And 16, 1949, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Report From The Chairman Of The Committee On The Preservation Of Natural Conditions, A. N. Wilcox

Journal of the Minnesota Academy of Science

No abstract provided.

Report Of The State Geologist 1947-1948, Maine Geological Survey

Maine Collection

Report of the State Geologist 1947-1948.

Maine Geological Survey - Maine Development Commission, Augusta, Maine - March 1949.

Contents: Activity of the Maine Geological Survey, 1947-48 / Joseph M. Trefethen -- Review of the Aroostook County Manganese Deposits / Joseph M. Trefethen -- Notes on Ground Water Conditions in Maine / Joseph M. Trefethen -- The Desert of Maine / Henry Allen and Elbert Pratt -- Reconnaissance Surveys of Limestones in Franklin County, Maine / Lawrence Wing and Arthur Dawson -- Preliminary Report on Asbestos and Associated Rocks of Northwestern Maine / Lawrence Goldthwait -- Clay Survey 1948 / Earl …

Synthesis Of Imidazolines, Diazepines, Triazepines And Imidazolidones From A 1, 2-Diamine And 1, 1-Dicarboxylic Esters, Irwin J. Pachter

Chemistry and Chemical Biology ETDs

In 1884 Freund (1) heated a mixture of malonic ester and ethylenediamine and obtained a product which dried to give a high melting powder. He named the compound ethylenemalonamide and attributed a seven-membered ring structure to it.

An Annotated List Of The Orthoptera Of Nebraska Part I The Blattidae, Mantidae And Phasmidae, Harold A. Hauke

Bulletin of the University of Nebraska State Museum (1924–2023)

This paper is the first of a series on the Orthoptera of Nebraska. In 1932, while a graduate student at the University of Nebraska, the author began a taxonomic study of the Orthoptera, the result of which was an unpublished List of the Othoptera of Nebraska. The list has been studied and revised.

Electrolyte Equilibria In Blood, Edward J. Fitzsimons

Dissertations

No abstract provided.

Studies In Quantitative Paleontology Ii. Multivariate Analysis—A New Analytical Tool For Paleontology And Geology, Benjamin H. Burma

Department of Earth and Atmospheric Sciences: Faculty Publications

Multivariate analysis is the simultaneous comparison of three or more variables in order to determine the significance of their likenesses and differences. The technique has been in use for some thirteen years, but no simple account of the method has hitherto been available. An illustrative example from invertebrate paleontology is here used, but the method is applicable to any problem in geology involving several quantitatively known variables.

Electrophoretic Studies Of A Synthetic Rubber-Like Lastex., Hulen Brown Williams

LSU Historical Dissertations and Theses

No abstract provided.

Preliminary Geomorphological Studies Of The Lime Creek Area & Preliminary Report On The Lime Creek Sites: New Evidence Of Early Man In Southwestern Nebraska, C. Bertrand Schultz, Gilbert C. Lueninghuener, W. D. Frankforter

Bulletin of the University of Nebraska State Museum (1924–2023)

PALEONTOLOGICAL and archaeological discoveries were made near Cambridge, Nebraska, by the University of Nebraska State Museum field party in the spring of 1947 (Schultz and Frankforter, 1948, pp. 279-280) . Fossils and artifacts were found in situ at the base of a fifty-foot terrace on Lime Creek (University of Nebraska State Museum Localities Ft-41 and Ft-42) and on Medicine Creek just below the mouth of Lime Creek (Ft-50). Lime Creek is located (Fig. 1) in southwestern Nebraska in the southeastern part of Frontier County. It is a tributary of Medicine Creek which in turn is a tributary to the Republican …

Studies In Quantitative Paleontology: I. Some Aspects Of The Theory And Practice Of Quantitative Invertebrate Paleontology, Benjamin H. Burma

Department of Earth and Atmospheric Sciences: Faculty Publications

For some time there has been a noticeable trend toward a more strictly quantitative outlook in paleontology. In view of many special circumstances encountered in dealing with fossil material, there is a rather extended consideration here given to the theoretical background of the quantitative method as applied to fossil invertebrates. First there is a consideration of the relations between sampling theory and paleontology. This is followed by a discussion of variability in populations and the problem of inference from sample to population. A consideration is next given to the species concept and a comparison of the units which can be …