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Articles 68311 - 68340 of 69086
Full-Text Articles in Physical Sciences and Mathematics
Geology Of A Kyanite Deposit Near Ennis, Montana, Clarence L. Nordstrom
Geology Of A Kyanite Deposit Near Ennis, Montana, Clarence L. Nordstrom
Bachelors Theses and Reports, 1928 - 1970
A deposit of kyanite, an aluminum silicate mineral used in the ceramic industry, occurs in the low foothills of the Gravelly range about 10 miles south of Ennis, Montana. This study deals primarily with the character and origin of the deposit, and its relationship to the surrounding rocks.
A Preliminary Investigation Of Chromite, Lester C. Brown
A Preliminary Investigation Of Chromite, Lester C. Brown
Bachelors Theses and Reports, 1928 - 1970
The purpose of this thesis was to study the effects of cryolite and a mixture of cryolite and aluminum oxide on a chromite concentrate with special reference to the ability to break the bond between the ferrous iron and chromic oxide in the chromite.
Distribution And Lithology Of Sedimentary Rocks In Montana And Adjacent Areas, Harold Kentta
Distribution And Lithology Of Sedimentary Rocks In Montana And Adjacent Areas, Harold Kentta
Bachelors Theses and Reports, 1928 - 1970
The general features of the sedimentary rocks in a region, their distribution, and the relationships of these rocks to other rocks of the area and of adjacent areas, are some of the things in which most geologists are interested, for reasons of general curiosity or for obtaining a better understanding of their specific problems
Experiments On The Keto-Cleavage Of D1 (2-Cyanoethyl) Acetoacetic Ester, Charles W. Huff
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.
Glaciation In Montana, Alvin H. Lense
Glaciation In Montana, Alvin H. Lense
Bachelors Theses and Reports, 1928 - 1970
Glacial deposits are increasingly entering into consideration in engineering projects, soil surveys, ground-water supply, sources for industrial materials, and other economic enterprises. In the field of engineering, glacial deposits if present must be considered in connection with reservoir sites, dam or bridge abutments, road building, and other types of construction work.
The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford
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
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.
Pennsylvanian Stratigraphy Of The Colorado Springs Quadrangle, Colorado., Kenneth Phelps Mclaughlin
Pennsylvanian Stratigraphy Of The Colorado Springs Quadrangle, Colorado., Kenneth Phelps Mclaughlin
LSU Historical Dissertations and Theses
No abstract provided.
Lipide Stimulation Of Lactobacilli., Virginia R. Williams
Lipide Stimulation Of Lactobacilli., Virginia R. Williams
LSU Historical Dissertations and Theses
No abstract provided.
The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay
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
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.
Geology Of The Einstein-Apex Tungsten Mine Area, Joel B. Pomerene
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, …
Insoluble Residues Of Five Sections Of The Amsden Formation, Wilmer R. Peterson
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.
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
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.
A Spectral Study Of Some Deuterated Toluenes., Charles Hooper Smith
A Spectral Study Of Some Deuterated Toluenes., Charles Hooper Smith
LSU Historical Dissertations and Theses
No abstract provided.
Crude Oil Salts In Petroleum Refining., Thomas Porter Bailey 1914-2001
Crude Oil Salts In Petroleum Refining., Thomas Porter Bailey 1914-2001
Electronic Theses and Dissertations
No abstract provided.
A Study Of The Synthesis Of 4-Chlorobutanal., Carl E. Moore 1915-2012
A Study Of The Synthesis Of 4-Chlorobutanal., Carl E. Moore 1915-2012
Electronic Theses and Dissertations
No abstract provided.
An Investigation Of The Meaning Of Α3 As A Measure Of Skewness, John W. Coy
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.
Studies In The Determination Of Iodine In Soils Organic Materials, And Waters, Russell T. Lundell
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
A Study Of Retention Of Percentage, Fred Dellett
Master's Theses
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
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 …
The Effect Of Sodium And Potassium Ions On The Time Of Set Of Silicic Acid Gels, Orin Chester Hansen
The Effect Of Sodium And Potassium Ions On The Time Of Set Of Silicic Acid Gels, Orin Chester Hansen
Honors Theses
This paper will deal with the relative effect of the potassium and sodium ions on the time of set. To determine this effect, gels were prepared using potassium silicate in place of the sodium silicate used in the previous experiments on the effects of electrolytes in this laboratory. The heat of activation for the setting of the potassium silicate gels was determined by the method used by Hurd and Letterton (7) in which the logarithm of the time of set was plotted against the reciprocal absolute temperature, the heat of activation being computed from the slope of the resulting line …
The Effect Of Polyvalent Electrolytes On The Viscosity Of Silicic Acid Gel Mixtures, David John Gimber
The Effect Of Polyvalent Electrolytes On The Viscosity Of Silicic Acid Gel Mixtures, David John Gimber
Honors Theses
Von Weimarn has shown that the degree of supersaturation at the time of formation, and the viscosity of the medium account, qualitatively at least, for the resulting character of the precipitate from a solution, whether it be crystalline of amorphous. When fairly concentrated solutions form precipitates they are usually colloidal in nature and may even be gelatinous, or a jelly may be formed. When a precipitate, thus formed, retains an appreciable quantity of the liquid in which it was dissolved in the form of a semi-rigid mass, it is termed a “gelatinous precipitate”, and if all the liquid is initially …
Heats Of Solution In Liquid Ammonia, Merwin William Warren
Heats Of Solution In Liquid Ammonia, Merwin William Warren
Honors Theses
The present work consists in measurements of the integral heat of solution of dimethylamine hydrochloride, and its isomer, ethyl ammomium chloride, and preliminary measurements on phenyl-amine hydrochloride.
Degree Of Substitution In Ethylchlorosilanes, Charles Guare
Degree Of Substitution In Ethylchlorosilanes, Charles Guare
Honors Theses
When an organo-magnesium halide is reacted with an excess of trichlorosilane, a mixture of products results according to the equations. If phenyl magnesium bromide is used, a mixture of high boiling products results, the highest boiling point of which is approximately 250° at 14mm. pressure. If ethyl magnesium bromide is used, it may be shown that, making certain assumptions and under the conditions of the experiment, if ethyl magnesium bromide is added to the trichlorosilane, monosubstitution is promoted, whereas if the trichlorosilane is added to the ethyl magnesium bromide, polysubstitution is promoted.
Application Of The Cathode Ray Oscillograph To Polarographic Analysis, George Sidney Wooster
Application Of The Cathode Ray Oscillograph To Polarographic Analysis, George Sidney Wooster
Honors Theses
The object of this work is to devise a method of reproducing on a cathode ray oscillograph the current-voltage curves that are obtained with the Fisher Electropode, and from these curves determine directly the half-wave potentials of the elements present in a test solution. This test solution is composed of copper, lead, cadmium, and zinc ions in a supporting electrolyte of .1 normal k C1.
Dialysis Of Silicic Acid, Frank Witzel
Dialysis Of Silicic Acid, Frank Witzel
Honors Theses
There were two objectives in carrying out this investigation. To lend more evidence to the establishment of the polysilicic theory. To investigate the possibilities of using a colorimetric analysis for the determination of relatively large amounts of silica.
Microradiography With Metal Powders, Wallace Kluck
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.
An Investigation Into The Adaption Of The Induction Furnace For Determining The Equilibrim Diagram Of The System Cu2s-Fes, John R. Cole
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.
A Preliminary Investigation Of The Hydrometallurgy Of Philipsburg Manganese, W. L. Goodman
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.