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Articles 69121 - 69150 of 69938

Full-Text Articles in Physical Sciences and Mathematics

Spectroscopy, Harvey E. Wagner May 1947

Spectroscopy, Harvey E. Wagner

Bachelors’ Theses

No abstract provided.


Spectroscopy, Harvey E. Wagner May 1947

Spectroscopy, Harvey E. Wagner

Bachelors’ Theses

This thesis was first concerned with a spectroscope based on an eagle mounting (instrument no. 57034). However, due to apparatus difficulties it was necessary to start again using a spectroscope based on a Paschen Runge Mounting (instrument no. 37102 - 124 Central Scientific Co.).


Experiments On The Keto-Cleavage Of D1 (2-Cyanoethyl) Acetoacetic Ester, Charles W. Huff May 1947

Experiments On The Keto-Cleavage Of D1 (2-Cyanoethyl) Acetoacetic Ester, Charles W. Huff

Chemistry Honors Papers

This 12 page thesis examines effects of the addition of acrylo-nitrile to acetoacetic ester.


The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford Apr 1947

The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford

Theses and Dissertations

This brief discussion and research paper attempts to correlate a large portion of the information about the preparation of known organic chloroformates and carbonates, to point out the present and possible future uses of these compounds, and to contribute some information concerning the preparation of a number of the organic carbonates. A comparison of the different methods of preparation is made.


Laboratory Model Shaking Table; An Investigation Of Defects And Suggested Improvements, George C. Horak Mar 1947

Laboratory Model Shaking Table; An Investigation Of Defects And Suggested Improvements, George C. Horak

Bachelors Theses and Reports, 1928 - 1970

The laboratory model is considered in this thesis. Information gained from this investigation has not been trans­ferred to the larger industrial machines. Some of the factors noted concerning the efficiency of the laboratory shaking table are inherent in this small scale model only.


Insoluble Residues Of Five Sections Of The Amsden Formation, Wilmer R. Peterson Jan 1947

Insoluble Residues Of Five Sections Of The Amsden Formation, Wilmer R. Peterson

Bachelors Theses and Reports, 1928 - 1970

The term, "insoluble residue," as used in this report is that portion of the original rock sample remaining after the sample has been digested by a mixture of one part hydrocloric acid and two parts water. The remains or insoluble residue from this acid treatment may vary from nothing to I00 percent.


The Interplaner Spacings Of Atoms In Titanates, Elizabeth R. Mcgrath Jan 1947

The Interplaner Spacings Of Atoms In Titanates, Elizabeth R. Mcgrath

Bachelors’ Theses

The science of crystallography was founded about one hundred fifty years ago by Rene Hauy. This science is the study of the outward form of crystals, and soon the crystallographer learned to classify the crystalline substances according to their outward form, particularly by the angles formed between faces of the crystals.


A Study Of The Synthesis Of 4-Chlorobutanal., Carl E. Moore 1915-2012 Jan 1947

A Study Of The Synthesis Of 4-Chlorobutanal., Carl E. Moore 1915-2012

Electronic Theses and Dissertations

No abstract provided.


A Spectral Study Of Some Deuterated Toluenes., Charles Hooper Smith Jan 1947

A Spectral Study Of Some Deuterated Toluenes., Charles Hooper Smith

LSU Historical Dissertations and Theses

No abstract provided.


Lipide Stimulation Of Lactobacilli., Virginia R. Williams Jan 1947

Lipide Stimulation Of Lactobacilli., Virginia R. Williams

LSU Historical Dissertations and Theses

No abstract provided.


Pennsylvanian Stratigraphy Of The Colorado Springs Quadrangle, Colorado., Kenneth Phelps Mclaughlin Jan 1947

Pennsylvanian Stratigraphy Of The Colorado Springs Quadrangle, Colorado., Kenneth Phelps Mclaughlin

LSU Historical Dissertations and Theses

No abstract provided.


The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay Jan 1947

The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay

Masters Theses

"The purpose of this thesis is to provide a means of preparing highly purified samples of neodymium and praseodymium compounds when the material to be refined already exists in a state of approximate purity. The method described cannot be profitably used to purify the individual rare earths without first concentrating them. The process is not intended to be quantitative, for it is a fractional crystallization technique using a concentrated hydrochloric acid medium"--Introduction, page 1.


Geology Of The Ozark-Martin Mine Area, Madison County, Missouri, William Clifton Hayes Jan 1947

Geology Of The Ozark-Martin Mine Area, Madison County, Missouri, William Clifton Hayes

Masters Theses

"General descriptions of the region adjacent to the Ozark and Martin Mines of Madison County, Missouri have been included in a number of early publications dealing with the Einstein Silver Mine area, but a detailed geologic map has not been made. It was thought that through detailed mapping and by a detailed analysis of all of the geologic features present, a more definite relationship between mineralization and structure might be determined"--Introduction, Purpose and Scope of Work, page 1.


An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break Jan 1947

An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break

Masters Theses

"There has been a need for a rapid and an accurate method for the determination of fluorine in its compounds. Both gravimetric and volumetric methods have been studied, but both methods were time consuming or inaccurate or both. Colorimetric methods had been studied before F. Richter developed his method but none had been reported to be as satisfactory as his method. This method was investigated because it was thought that F. Richter's method would be a satisfactory colorimetric determination for fluorine in its compounds"--Introduction, page 1.


Crude Oil Salts In Petroleum Refining., Thomas Porter Bailey 1914-2001 Jan 1947

Crude Oil Salts In Petroleum Refining., Thomas Porter Bailey 1914-2001

Electronic Theses and Dissertations

No abstract provided.


Geology Of The Einstein-Apex Tungsten Mine Area, Joel B. Pomerene Jan 1947

Geology Of The Einstein-Apex Tungsten Mine Area, Joel B. Pomerene

Masters Theses

"The geological problem existing in the Silver Mine area, the relationship of mineralization to structure, particularly to faulting and jointing, was pointed out to the writer by Prof. O. R. Grawe. Several geologists have made reconnaisance [sic] surveys of the whole region, but so far no detailed geologic map has been published of the immediate area. Prof. Grawe pointed out that such a map would be of value in the better understanding of the area and would be especially useful in the event that another national emergency required the development of all possible sources of tungsten"--Introduction, Selection of the Problem, …


An Investigation Of The Meaning Of Α3 As A Measure Of Skewness, John W. Coy Aug 1946

An Investigation Of The Meaning Of Α3 As A Measure Of Skewness, John W. Coy

Mathematics & Statistics ETDs

The purpose of this study is the interpretation of α3 by means of a relatively simple formula which will predict the amount of shift in the effective limits of the Type III curve for a given change in the skewness. The methods used are chiefly empirical.


The Synthesis And Certain Chemical Properties Of Several Aromatic Fluorides, Horst G. Schneider Aug 1946

The Synthesis And Certain Chemical Properties Of Several Aromatic Fluorides, Horst G. Schneider

Bachelors’ Theses

The preparation of organic fluorides, until only recently, had been seriously curtailed not only because of the difficulty experienced in their synthesis, but also due to the lack of information with regard to their physical and chemical properties. With the investigation of their characteristics, their great importance was for the first time fully realized. A concerted search was made for new modes of their preparation. That this search was rewarded is shown in part by the synthesis of several aromatic fluorides as a portion of this thesis.


Studies In The Determination Of Iodine In Soils Organic Materials, And Waters, Russell T. Lundell Aug 1946

Studies In The Determination Of Iodine In Soils Organic Materials, And Waters, Russell T. Lundell

Theses and Dissertations

A summary of the literature on the nutritional value of iodine in the diet of various forms of life is given. The majority of evidence indicates that iodine is an essential element in plant and animal nutrition. It functions particularly in animal metabolism in the form of thyroxine. The occurrence of iodine in a nature has been briefly discussed. Investigations made in this regard indicate iodine to be almost universally distributed in very minute amounts. Most iodine salts are soluble in water and their distribution is affected by water movements. Results of iodine determinations made during the course of this …


A Study Of Retention Of Percentage, Fred Dellett Jul 1946

A Study Of Retention Of Percentage, Fred Dellett

Master's Theses or Doctor of Nursing Practice

The problem of this thesis was to determine by means of a test the retention of the fundamentals of percentage as shown by beginning eighth grade pupils, who were taught percentage the previous year in the seventh grade. The fundamentals of percentage are here considered as the changing of percents to decimal fractions or common fractions, the reverse procedures, and the three types of problems arising from the relation, base times rate equals part. These quantities, base, rate, and part, are represented in the example, 300 X 12% = 36, respectively. Because of the inherent relationship of decimal fractions and …


Geology And Ore Deposits Of The Dunmore Mine, Ouray County, Colorado, Caswell Silver Jun 1946

Geology And Ore Deposits Of The Dunmore Mine, Ouray County, Colorado, Caswell Silver

Earth and Planetary Sciences ETDs

The Dunmore lode is located near Ouray, Colorado in the northwest part of the San Juan Mountains. In structure as well as mineral assemblage it shows a connection between the chimneys and veins of the region. The lode averages about 100 feet wide for 1,200 feet along the Dunmore claim. The fissure zone is over two miles long and displacement along it has offset a folded pre-Cambrian complex 4,500 feet prior to the deposition of 2,400 feet of volcanic tuff. Fissures in the pre-Cambrian rocks controlled in part the intrusion of dikes and the formation of veins. Late Tertiary faulting …


Microradiography With Metal Powders, Wallace Kluck Jun 1946

Microradiography With Metal Powders, Wallace Kluck

Bachelors’ Theses

Microradiography is a comparatively recent development in the X-ray field. The term applies to the analysis of a thin specimen by photographing it with X-rays and subsequently enlarging the photograph to bring out minute structural elements. A microradiograph has several advantages over a photomicrograph. First of all it goes beyond the surface and reveals the internal structure of the specimen, a more important advantage at least as concerns this paper is the ability of the microradiograph to enable one to accurately determine the chemical elements making up the specimen.


The Effect Of Some Electrolytes On The Critical Solution Temperature Of The Phenol-Water System, Donald Gerald Leavitt Jun 1946

The Effect Of Some Electrolytes On The Critical Solution Temperature Of The Phenol-Water System, Donald Gerald Leavitt

Bachelors’ Theses

A classical example of a system of liquids exhibiting partial miscibility is the phenol-water system. One of the earliest binary systems of this type to be Investigated, it has been the subject of much research and experimentation during the past sixty years. Its critical solution temperature has been determined by a multitude of investigators, the effect of a third component upon the system has been studied and many generalizations concerning partially miscible binary systems have been derived from these undertakings.

The studies which have been carried on regarding this system have been chiefly of theoretical interest, although in recent years …


A Study Of The Lassaigne Test For Nitrogen, Marion Ann Stout Jun 1946

A Study Of The Lassaigne Test For Nitrogen, Marion Ann Stout

Bachelors’ Theses

The elementary analysis of an organic compound is a determining factor in the characterization of the compound. The problem of this analysis was first encountered in organic characterization class where it was impossible to obtain a satisfactory test for nitrogen using the Lassaigne Method. It is the purpose of this thesis to testout the Lassaigne method under various conditions and to determine a set of conditions hereby the test will be positive.


The Synthesis And Some Physical Properties Of Certain Aromatic Fluorides, John W. Weldon Jun 1946

The Synthesis And Some Physical Properties Of Certain Aromatic Fluorides, John W. Weldon

Bachelors’ Theses

The late discovery of methods of introduction of fluorine into organic compounds has retarded to some extent the commercial use of organic fluorides. The indirect methods used also prevented general preparation of fluorocompounds. However, the characteristic stability of many fluorine compounds has warranted both the preparation of numerous aromatic and aliphatic fluorides as well as a search for new methods of preparation. It 1s the purpose of this thesis to delineate the present methods of synthesis of aromatic fluorides and to show the influence of the substitution of fluorine on some of the physical properties of aromatic compounds.


An Investigation Into The Adaption Of The Induction Furnace For Determining The Equilibrim Diagram Of The System Cu2s-Fes, John R. Cole May 1946

An Investigation Into The Adaption Of The Induction Furnace For Determining The Equilibrim Diagram Of The System Cu2s-Fes, John R. Cole

Bachelors Theses and Reports, 1928 - 1970

This investigation was started in an effort to find an accurate and efficient method of determining the freezing points of ferrous and cuprous sulphides, mixtures of the two substances, and from this to establish the liquidus line of the equilibrium dia­gram.


Economic Talc Deposits Of Montana And Related Firing Problems, Charles J. Lyden May 1946

Economic Talc Deposits Of Montana And Related Firing Problems, Charles J. Lyden

Bachelors Theses and Reports, 1928 - 1970

This thesis has to do with a study of the produc­tion of talc in Montana, describing the local geology of each deposit, and a description of the laboratory tests that were made on various grades of Montana talc in an attempt to determine why some grades of talc can be burned in solid forms while others must be ground, mixed with a binder and molded.


A Preliminary Investigation Of The Hydrometallurgy Of Philipsburg Manganese, W. L. Goodman May 1946

A Preliminary Investigation Of The Hydrometallurgy Of Philipsburg Manganese, W. L. Goodman

Bachelors Theses and Reports, 1928 - 1970

In the past the steel industry of the United States has depended almost wholly on imports for its supplies of manganese. Although it is well known that there are enormous deposits of low grade manganese ore in the United States the production of substantial amounts of ferro-grade mater­ial from domestic sources presents a field for con­structive and practical research.


The Determination Of Interfacial Tension Using Pendant Drop Method, Katherine Tellor Mar 1946

The Determination Of Interfacial Tension Using Pendant Drop Method, Katherine Tellor

Bachelors’ Theses

Boundary tension is a measure of the free energy of a fluid interface. It is a term derived from the superficial analogy between the surface of a liquid and a stretched membrane. Just as the potential energy of a fluid mass in foot pound per pound is spoken of as a "head" in feet, so it is useful to speak of free energy of a fluid surface in ergs per square centimeter as a "tension" in dynes per centimeter.


The Electrodeposition Of Waxes From Emulsions, Richard Nebel Mar 1946

The Electrodeposition Of Waxes From Emulsions, Richard Nebel

Bachelors’ Theses

At the beginning of the nineteenth century, electrochemistry became an established part of the science of chemistry. Volta believed in the existence of some definite relationship between chemical and electrical phenomena and his investigations led to the discovery of a means of converting chemical energy to electrical energy. His observations became the foundation upon which all modern electrochemistry is based. Volta alternated zinc and silver disks with paper soaked in salt water between each disk. This afforded a source of electrical energy which produced a current and became to be known as the Voltaic-pile.