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The Sixty-Seventh Session Of The Iowa Academy Of Science And The Twenty-Second Convention Of The Iowa Junior Academy Of Science, April 15-16, 1955, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

38th Annual Meeting, 1954. Abstracts Of Papers, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Subsurface Correlations Of The Cretaceous Greenhorn-Lakota Interval In North Dakota : A Study In Facies, Dan E. Hansen

Theses and Dissertations

No abstract provided.

Condensation Reaction Of Terephthaladehyde And Acetophenone, Lloyd J. Mitchell

University of the Pacific Theses and Dissertations

The plant pigments constitute a fascinating group of compounds whose constitution has only recently been partially clarified. Roughly speaking, there are two main groups of pigment: the plastids, associated with the protoplasmic structure of plants, and the anthocyanins, generally found in solution in the cell sap. The term “anthocyanin” is derived from the Greek, “antho” signifying flower and “cyan” meaning blue, and was introduced by the botanist Marquart in 1835 to designate the blue pigments of flowers. It has since been extended to include all of the pigments of this group, the anthocyanin pigments being responsible for the innumerable shades …

A Polarographic Study Of Respiration In A Blue-Green Alga, Samuel Leonard Cooke Jr.

Master's Theses

The study of many aspects of physiology is accomplished by the study of respiration under varied conditions. For this purpose, a simple, rapid, and relatively accurate respirometer would be useful. This project was undertaken to investigate the possibility of adapting previously described polarographic techniques to the measurement of respiration.

Soil Additives And Their Effect On The Yield Of Various Crops And The Physical Properties Of An Agricultural Soil, Gaylen L. Ashcroft

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is generally accepted that soil structure is very important in keeping productivity at a high level. When soils are loose and friable, mechanical impedance to root growth and seedling emergence is greatly reduced. Such soils infiltrate greater quantities of precipitation, are better aerated, and possess a more favorable temperature than puddled soils. Essential plant nutrients are also more easily available in well aggregated soil.

In the last few years, several synthetic soil additives have been placed on the market. Extravagant claims have been made about the ability of these amendments to maintain soil structure, without a sound body of …

The Effect Of The Bicarbonate Ion On The Respiration Of Excised Roots, Gene W. Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

For many years man has been searching for a cure for lime-induced chlorosis. This disease is prevalent throughout the entire western United States and is characterized by a yellowing of the leaves, destruction of the chlorophyll, and eventual death of the plant. It has brought devastation of fruit orchards in Utah, costing fruit producers millions of dollars. Hardly any county in Utah is free from this destructive nutritional disease.

Growth And Nutrition Of Plants As Affected By Various Levels Of Exchangeable Sodium, Mohammad B. Choudhri

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In saline soils, which are characterized by an appreciable quantity of neutral soluble salts, plant growth is adversely affected due to the increase in osmotic pressure and the consequent decrease in the physiological availability of water. In addition, growth may also be restricted through the accumulation of toxic quantities of various ions within the plant.

On the other hand, alkali soils, whether saline or non-saline, are characterized by a high content of exchangeable sodium in the cation-exchange complex. One reason of low productivity on these soils is the unfavorable physical conditions induced by the dispersing action of the sodium ions. …

The Velocity Of Ultrasonics In Liquids, Mack A. Breazeale

Masters Theses

"In acoustics the term ultrasonics is used to refer to those frequencies which are above the range of human hearing; that is, frequencies above approximately 20,000 cycles per second. Since the laws of sound which are valid for the audible range are also valid in the ultrasonic range and since the wave length of ultrasonics is much shorter than that of audible sound, ultrasonic has proved very valuable in the calculation of both the velocity and the absorption coefficient of sound in various media. This is especially notable in the case of liquids, where the velocity of sound is much …

Studies Of The Reactions In Alcoholic Solution Of Gold(Iii) And Alpha-Naphthylamine., Theo Conner Mccoy

LSU Historical Dissertations and Theses

No abstract provided.

Biological Oxidation Of Copper Sulfide Minerals, Delmar Boyd Davis

Theses and Dissertations

This work represents a study of the biological oxidation of copper sulfide minerals. The principal objective of the study was to determine the extent of bacterial oxidation on copper containing sulfide minerals. It was also desired to determine if the bacteria could oxidize copper sulfides in the absence of iron. A better understanding of the nitrogen requirements of the organisms was desired. Minerals used in this study were Bingham Canyon Float Concentrate, chalcopyrite, covellite, calcocite, bornite, tetrahedrite, and reagent grade copper sulfide. The bacteria used were obtained from the mine waters of Bingham Canyon, Utah. To study the problem the …

Concentration Of Tungsten Ore From The Potosi Mining District, Ted S. Jordan

Bachelors Theses and Reports, 1928 - 1970

Tungsten is a strategic metal which, at present, is in short supply in the United States. In addition to its need in the defense effort, tungsten is becoming more and more in industrial demand and, as an increasing number of uses for this element are being found, so must additional sources of it be discovered and processed.

On The Theory Of Head Waves, Patrick Heelan

Research Resources

When a combined longitudinal and transverse disturbance, diverging from a localized source, strikes a plane boundary between two solid elastic media, several systems of head waves and second order boundary waves are generated, each associated with grazing incidence of one or the other of the reflected or refracted waves. Associated with grazing incidence of P ₁ P₂, the refracted P-wave, is the head wave system comprising P₁P₂P₁ (the "refracted wave" of seismic prospectors), and P₁P₂S₁ (a transverse head wave) in the upper medium, and P₁P_{2 …}

An Investigation Of The Effects Of Wave Propagations In An Infinite Membrane Upon The Motions Of Salt Particles On The Surface, Robert Talmadge Maupin

Electronic Theses and Dissertations

No abstract provided.

Ultraviolet Absorption Spectra Of Quinoxaline And Some Of Its Derivatives, Fred Dale Huillet

Theses and Dissertations

A long term research program into the chemistry of quinoxalines has been instituted at Brigham Young University with the aim of preparing the vinylquinoxalines so that their 1,4-addition reactions might be studied. The literature of quinoxaline chemistry has been thoroughly reviewed and assembled. Methods of preparing 2-methyl- and 2,3-dimethylquinoxaline have been studied and improved but all attempts to prepare the vinylquinoxalines have been unsuccessful. In the course of these attempts several compounds of unknown structure were prepared. The purpose of this investigation is to study the spectra of various known quinoxaline derivatives and to attempt to identify the unknowns by …

Electric Conduction At An Interface., Hung-Chi Chang

LSU Historical Dissertations and Theses

No abstract provided.

Studies Of Electrochemical Polarization In Liquids Of Several Ranges Of Conductivity., John Allen Rider

LSU Historical Dissertations and Theses

No abstract provided.

Separation Of Amines And Alkanolamines By Means Of Paper Partition Chromatography, Kenneth A. Waehner

Bachelors’ Theses

The amines may be regarded as derivatives of the hydrocarbons in which a hydrogen atom has been replaced by an amino group; or as derivatives of ammonia in which one or more hydrogen atoms have been replaced by alkyl groups. They may be classified according to structure as primary (R-NH2), secondary (¾-NH) and tertiary (R3-N) amines. In a similar way, ammonium halides or hydroxides may have one or more hydrogen atoms of the ammonium group replaced by alkyl groups to give alkylammonium, dialkylammonium, trialkylammonium and tetraalkylammonium halides or hydroxides.

Preparation Of Vanillic Acid And Some Of Its Metallic Salts, Elaine A. Dittmar

Bachelors’ Theses

Very little work has been done with vanillic acid and its derivatives since the time when the acid was first synthesized. There are usually good reasons why compounds showing such important properties as food preservatives have lain idle for over seventy-five years. It is of great. interest to know the reasons behind this idleness and also to attempt to prepare some of the derivatives heretofore unreported.

This is the purpose for which this thesis has been written; that a little more knowledge will be contributed to a relatively virgin field. Submitted are the preparation of vanillic acid and some of …

The Rate Of Hydrolysis Of Ethyl-Α-Β-Dibromopropionate, Earl Ney

Bachelors’ Theses

Experimentation on the rate of hydrolysis of esters is preceded only by the rate of inversion of cane sugar started by Wilhemy in 1850. However, work on ester hydrolysis soon took the stage in preference as the reaction most favorable to the study of reaction rates. Ostwald's work on the rate of hydrolysis of ethyl acetate in 1884 was the first monumental work and experimentation then proceeded so rapidly that in 1889 Arrhenius' theory of hydrogen ion catalysis and later the dissociation theory itself was born and nursed. Yes, nursed by many more ester hydrolysis experiments which built up such …

A Statistical Review Of 436 Submucous Resections With Post-Operative Results Of 338 Cases, D. Wilson Hales

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

Translation Of Mexican Game Law, Milton J. Linder, Rae Kaplan

Other Publications in Wildlife Management

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Chapter 7

Chapter 8

Chapter 9

Chapter 10

Chapter 11

Transitories

Information to the Foreings Hunters in Mexico

Translation of Order appearing in the Diario Official (September 4, 1954)

Table

Separation Of The Ions Of Groups Iiia And Iiib By Means Of Paper Chromatography, Norman Leffler

Bachelors’ Theses

Since chromatography, In view of its ever increasing importance, may some day largely replace the more traditional methods of qualitative analysis, this research has been aimed not only toward the establishment of a scheme of separation for the ions of group III, but also toward presenting and applying the theoretical principles and basic techniques of this comparatively young branch of analytical science.

Aromatic Acetals : Their Synthesis And Alkylation, Robert Conner Gass

University of the Pacific Theses and Dissertations

The purpose of this investigation was to study the known methods of forming acetals and find one or several that could be used in further investigation. In connection with the reactions, the use of various catalysts was pertinent. Some of the catalysts used were hydrogen chloride, calcium chloride, ferric chloride, aromatic sulfonic acids, and other. There was no data available comparing the sulfonic acids with the inorganic salts and mineral acids. For that reason one of the subsidiary problems of this investigation was such a comparison.

In order to investigate stability, several acetals were subjected to conditions intended to produce …

Geochemical Prospecting Applied To The Illinois-Kentucky Fluorspar Area, Matthew Peter Nackowski

Doctoral Dissertations

"This study was completed to determine whether geochemical methods of prospecting could be applied to the search for fluorspar deposits in the Illinois-Kentucky fluorspar district.

During the course of the study, aspects of the geochemical cycle of fluorine under the climatic environment encountered were noted in the zone of weathering.

The Illinois-Kentucky fluorspar district supplies a large portion of the fluorite consumed in the United States. The producing deposits are of two geologic types. The vein deposits occur as nearly vertical tabular lenses or pods which occupy fractures. These deposits may reach the bedrock surface, but in any case, the …

The Identification Of Various Halogen Compounds Through Formation Of Quaternary Ammonium Salts, Kenneth E. Miller

Bachelors’ Theses

When, in the process of characterizing an organic compound, the compound has been definitely placed in one certain class, such as acids or alcohols, and all but a certain number of the compounds in the class have been eliminated by physical constants or functional groups, the final step is the preparation of suitable derivatives. If, however, the unknown falls into a class of compounds of such chemical nature that preparation of deriyatives is impossible, or, at the least, difficult, then the identification must depend entirely upon physical constants. This is frequency the case with alkyl halides. They must be identified …

Phenol-Aldehyde-Condensation Synthesis Of A Possible Gerxioide And Fungioide, Bis(4-Fluoro-2-Hydroxyphenyl) Methane, Erwin A. Stern

Bachelors’ Theses

The successful synthesis of chlorinated and brominated dihydroxydlphenylmethanes during the last ten years and their use as germicides and fungicides coupled with the known effect of fluorine and alkyl groups upon phenol, warranted the attempted synthesis of fluorinated and alkylated dihydroxydiphenylmethanee . It is the purpose of this thesis to attempt the synthesis of fluorinated and alkylated dihydroxydiphenylmethanee for purposes of their use as germicides and fungicides.

Benefication Of A Tungsten Ore, James Alexander Shaffer Jr.

Bachelors Theses and Reports, 1928 - 1970

Tungsten is a metal of high strategic value in the defense effort. It is used chiefly to improve creep strength in steels, although a significant percentage enters into the manufacture of cemented carbide tool bits. Therefore, in this age of mechanized warfare, quality and quantity of defense production depend greatly on tungsten.

Resistance Of Solid Inconel To Attack By Liquid Indium, David C. Hendra

Bachelors Theses and Reports, 1928 - 1970

The role of liquid metals in industry is rap­idly becoming of increasing importance. The phys­ical and chemical tendencies of metals in the liq­uid condition must be ascertained before a metal in this form can be put to practical usage. In very many stages of mineral processing and recovery, in molten-metal baths for temperature control on heat treating, and in several industries where heat transfer is an important aspect, metals may be at one time or another in a liquid condition.

A Microscopic Study Of The Ore Minerals From The Mines In The Northern Part Of The Zosell (Emery) Mining District, John P. Joyce

Bachelors Theses and Reports, 1928 - 1970

Any investigation of the many gold silver producing districts of Montana will necessarily include the name Zosell. The Zosell Mining District, often referred to as the Emery District, was never a major producer in the state; however, its location, history, type of deposit, and char­acter of ore, has drawn the interest of many prominent investigators of the mineral industry.