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Articles 290431 - 290460 of 292240
Full-Text Articles in Physical Sciences and Mathematics
A Pleistocene Lake In The White River Valley, Paul Macclintock, Erwin Hinckley Barbour, C. B. Schultz, Alvin Leonard Lugn
A Pleistocene Lake In The White River Valley, Paul Macclintock, Erwin Hinckley Barbour, C. B. Schultz, Alvin Leonard Lugn
Department of Earth and Atmospheric Sciences: Faculty Publications
DURING the course of a field conference on the Pleistocene geology of western Nebraska, carved sediments were found in the headwater drainage of White River near Crawford, Nebraska. A reconnaissance of White River Valley revealed them to be present also in the mid-course, near Interior, South Dakota, and at the mouth, near Chamberlain, South Dakota, where the White River joins the Missouri (Fig. 1). These isolated occurrences of varves, over a distance of 240 miles, are so similar that a correlation seemed possible. Furthermore, since the varves occur within the area where Yuma artifacts are found, it was thought that …
The Reptiles Of Cherokee County, Kansas, Myron Alec Hurd
The Reptiles Of Cherokee County, Kansas, Myron Alec Hurd
Electronic Theses & Dissertations
Cherokee County has an area of 585 square miles. The greater part is covered with hydrophytes and mesophytes, but there are some Xerophytic areas. A large part of its area is covered with typical prairie grassland. Thickets of plum, sumac, persimmon, hawthorne, blackberry, and buck brush occur in pastures and wastelands. Along the streams may be found the elm-ask-oak assocations and other plants. Along the embankments may be found blackberry, sumac, and wild rose. Surrounding the ponds and marsh areas are rushes, reeds, button willows, and willows.
The mean annual temperature is 56 degrees fahrenheit. The three summer months average …
Effect Of Salts On The Setting Time Of Silicic Acid Gels, Gustav F. Hallstrom
Effect Of Salts On The Setting Time Of Silicic Acid Gels, Gustav F. Hallstrom
Honors Theses
It has been stated by Prasad and Hattiangadi (1) that the process of setting of mixtures of solutions of sodium silicate and acetic acid consists of three stages: (a) The formation of silicic acid by the interaction of the acid with sodium silicate (b) The formation of the colloidal solution of silicic acid (c) The coagulation of the colloidal solution by the electrolytes liberated in the first reaction The present investigation was undertaken with a view to examine the effect produced on the time of setting of the silicic acid gels by the addition of extra quantities of electrolytes to …
Influence Of Temperature And Acid On Time And Set Of Silicic Acid Gels, Kenneth Jacob Frederick
Influence Of Temperature And Acid On Time And Set Of Silicic Acid Gels, Kenneth Jacob Frederick
Honors Theses
The underlying purpose of this research was to gain a further insight into the mechanism of the setting of silicic acid gels. The primary purpose, however, was to study the effect upon the heat of activation of the substitution of the weak acids, heretofore used almost entirely in the work done at Union College on these gels, by certain strong acids. The acids employed in this research were hydrochloric, nitric and sulphuric. Several gels were prepared from a standard silicate solution and each of these acids. Measurements of the time of set and pH were taken for each gel. Four …
Heats Of Solution In Liquid Ammonia, Herman Dettbarn Kluge
Heats Of Solution In Liquid Ammonia, Herman Dettbarn Kluge
Honors Theses
Liquid ammonia in many of its reactions and properties stimulates water. Next to water liquid ammonia is the best known electrolytic solvent. It dissolves a large number of salts to form, in general, conducting solutions, in which the ions are more mobile. Dilution Curve. The heat of dilutes is plotted against the change in the moles of ammonia. The curves approach a constant value which is the heat of dilution. These curves were plotted to compare the heat of dilution of ammonia chloride and ammonium bromide.
Time Of Set Of Silicic Acid Gels, Michael Priznar
Time Of Set Of Silicic Acid Gels, Michael Priznar
Honors Theses
The purpose of this work is to study the time of set of silicic acid gels as a function of the temperature. All data are confined entirely to acid gels made by mixing sodium silicate and an acid.
Change Of Conductivity Of Silicic Acid Gels Upon Setting, Robert E. Russell
Change Of Conductivity Of Silicic Acid Gels Upon Setting, Robert E. Russell
Honors Theses
During the studies made on the structure of silicic acid gels, several theories of gel formation have been proposed. The theory at present under consideration has to do with the polymerization of the molecule H2SiO3 into some of structure, most probably due to the splitting out of water molecules as is indicated.
A Study And Application Of The Process Of Supergene Enrichment Of Silver Ores., Arthur C. Verling
A Study And Application Of The Process Of Supergene Enrichment Of Silver Ores., Arthur C. Verling
Bachelors Theses and Reports, 1928 - 1970
In many deposits of silver ores the grade of the ore decreases considerably a few hundred feet below the surface. It is believed that in many cases the better ores owe their richness in part to the process of sulphide enrichment. It is recognized, however, that many rich silver ores are hypogene deposits that have been affected very little, if any, by processes of enrichment.
Chemical Analyses Of Some Oil-Well Waters Of Russell, Ellis And Trego Counties, H. Everett Runyon
Chemical Analyses Of Some Oil-Well Waters Of Russell, Ellis And Trego Counties, H. Everett Runyon
Master's Theses
Considerable work dealing with analysis of oil-well waters of other areas has been published, but to the knowledge of the author, none has been published dealing specifically with the waters of this area. While the waters dealt with in this paper are not far different from the waters of the Midcontinent area as a whole, there are certain differences which are noticeable. For instance strontium is found in the top waters of the Eldorado, Kansas field. None has been found in this area. The sulphate content of the top water here is very high. Both apparently cause trouble at times. …
The Extraction Of Manganese From Manganese Flue Dust., John Raymond Moore
The Extraction Of Manganese From Manganese Flue Dust., John Raymond Moore
Bachelors Theses and Reports, 1928 - 1970
It is estimated that 90 to 95% of the world’s consumption of manganese is used in the steel industry in the form of either ferromanganese or spiegeleisen. The remainder is used in the form of either salts or oxides, chloride, dioxide and monoxide.
A Study Of The Effect Of Oxygen On The Rate Of Dissolution Of Gold In Cyanide Solutions., John A. Cook
A Study Of The Effect Of Oxygen On The Rate Of Dissolution Of Gold In Cyanide Solutions., John A. Cook
Bachelors Theses and Reports, 1928 - 1970
The accepted chemical reactions in the dissolution of gold by cyanide solutions require the presence of gold, cyanide, water, and oxygen. The importance of dissolved oxygen in cyanide solutions as a factor is recognized by those familiar with cyanidation. Manufacturers of cyanidation equipment realize the necessity of oxygen, as shown by the appliances they have developed which are attached to the agitators in order to saturate the cyanide solutions with air.
The Control Of The Grain Size Of Zinc, Oswald J. Wick
The Control Of The Grain Size Of Zinc, Oswald J. Wick
Bachelors Theses and Reports, 1928 - 1970
The use of zinc as a structural metal has been militated against by two of its properties, namely, its low tensile strength and its susceptibility to grain growth. The importance of these factors can be appreciated when it is realized that the tensile strength of coarsely crystalline cast zinc is 4,000 pounds per square inch, while finely crystalline cast zinc has a tensile strength of 12,000 pounds per square inch.
Contact Metamorphism In The Highlands, Frank Trask Jr.
Contact Metamorphism In The Highlands, Frank Trask Jr.
Bachelors Theses and Reports, 1928 - 1970
On the southern margin of the Boulder Batholith, about twenty miles south of Butte in the Highland Mountains, there are many miles of contact between the igneous and sedimentary rocks. As two kinds of igneous rocks and many different kinds of sedimentary rock are present, it is an excellent place for the study of contact metamorphism.
The Geology Of A Part Of The Bear River Range And Some Relationships That It Bears With The Rest Of The Range, Vic E. Peterson
The Geology Of A Part Of The Bear River Range And Some Relationships That It Bears With The Rest Of The Range, Vic E. Peterson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The structure of the western three or four miles of the Bear River range east of Logan, Utah, has many times been alluded to in papers written locally on Cache Valley and the related ranges. There has not however, ever been, to the author's knowledge, an investigation made of this portion of the range for the express purpose of determining its exact structure. Although the area specifically covered by this present investigation is greatly inadequate to base the whole west range structure on, the author believes that the facts brought to light by the specific study of this area, added …
The Vitamin D And Provitamin D Content Of Some Varieties Of Utah Wheat, Harold M. Nielsen
The Vitamin D And Provitamin D Content Of Some Varieties Of Utah Wheat, Harold M. Nielsen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Cereal grains were known to be notably deficient in the anti-rachitic principle even before the discovery of vitamin D. Clinicians had associated a type of rickets of infancy, characterized by an over-weight, flabby, bowlegged condition, with a diet consisting mainly of cereals. Mellanby (1) in 1921 concluded that this type of rickets is induced by overfeeding with carbohydrates. He also showed in the same report, however, that oatmeal, although it contains less carbohydrates than the other grains tested, possesses a special tendency toward rachitogenesis.
The Influence Of Ph On The Activity Of Trypsin And Papain (Caroid) As Measured By A Modification Of The Northrup Gravimetric Casein Method, Frank W. Dragan
The Influence Of Ph On The Activity Of Trypsin And Papain (Caroid) As Measured By A Modification Of The Northrup Gravimetric Casein Method, Frank W. Dragan
Bachelors’ Theses
Hydrogen ion concentrations have long been recognized as an essential factor in many biochemical processes.
The influence of hydrogen ion concentration upon enzyme activity has been of especial importance as proteolytic enzymes are rapidly gaining in use in various industries, principally the tanning industry.
Some Properties And Applications Of Symmetric Functions, Marie C. Kniewel
Some Properties And Applications Of Symmetric Functions, Marie C. Kniewel
Bachelors’ Theses
The word symmetry suggests that more fundamental aspect of all being, unity. In mathematics as in all other sciences, there is no going without having glimpsed something of that unity. Given even a glimpse, the wayfarer on the path toward mathematical truth, finds the traveling made, not easy, but more certain.
The Solution Of The Quartic Equation In One Variable, Jack W. Bril
The Solution Of The Quartic Equation In One Variable, Jack W. Bril
Bachelors’ Theses
The purpose of this thesis is to discuss two of the foremost solutions of the quartic equation---Descartes' method and Ferrari's method. Most of the ideas were garnered from books on the theory of equations. The historical material was obtained from histories of mathematics.
Geology And Ore Deposits Of The Golden Era And Goldfinch Mines, Argenta Mining District, Montana., Glenn C. Johnston
Geology And Ore Deposits Of The Golden Era And Goldfinch Mines, Argenta Mining District, Montana., Glenn C. Johnston
Bachelors Theses and Reports, 1928 - 1970
This report includes the results of geological investigation of a small area in the northern part of the Argenta mining district. Approximately two square miles were mapped. The underground working of the three mines only were accessible: the Goldfinch. Golden Era, and Mayday mines.
A Preliminary Study Of Montana Copper - Nickel Ore, J. Argall Mcallister
A Preliminary Study Of Montana Copper - Nickel Ore, J. Argall Mcallister
Bachelors Theses and Reports, 1928 - 1970
Deposits of sulfides, containing nickel and copper with associated platineferous minerals occur in the Stillwater Igneous Complex. This is a group of unusual igneous rocks situated in Stillwater and Sweetgrass counties in Montana.
The Effects Of Lime On The Amalgamation Of Gold., Rollien R. Wells
The Effects Of Lime On The Amalgamation Of Gold., Rollien R. Wells
Bachelors Theses and Reports, 1928 - 1970
An amalgam is an alloy of mercury with other metals, and amalgamation is the art of making or forming amalgams. In metallurgical language the word is limited to the means adopted for the recovery of gold and silver from their ores by the use of mercury.
Geology Of Some Gold Deposits Of Montana, Leo Edwin Efraimson
Geology Of Some Gold Deposits Of Montana, Leo Edwin Efraimson
Bachelors Theses and Reports, 1928 - 1970
Gold is one of the rarer metals in nature, and chemically it is one of the most inactive. Gold forms stable, natural compounds with few other elements, and only with metals.
Ua37/23 Whas Broadcast No. 31, Whas, Western Kentucky University, Earl Moore
Ua37/23 Whas Broadcast No. 31, Whas, Western Kentucky University, Earl Moore
WKU Archives Records
Script for weekly WKU broadcast on WHAS radio. This show included Kelly Thompson, Norma Lagura, C.P. McNally, Karl Beyer, Virginia Fortenberry, Helen Albritton, Paul McDaniel and B.T. Towery.
Front Matter
Journal of the Minnesota Academy of Science
The 4th Annual Meeting of The Minnesota Academy of Science.
A Configurational Approach To Sound, Alfred R. Root
A Configurational Approach To Sound, Alfred R. Root
Journal of the Minnesota Academy of Science
No abstract provided.
Soil Erosion Demonstration Areas In Southern Minnesota, R. H. Davis
Soil Erosion Demonstration Areas In Southern Minnesota, R. H. Davis
Journal of the Minnesota Academy of Science
No abstract provided.
An Analysis Of The Flowering Plants Of Nebraska, John Mack Winter
An Analysis Of The Flowering Plants Of Nebraska, John Mack Winter
Conservation and Survey Division
No abstract provided.
A Study Of Certain Physical And Chemical Effects Of Aromatic Halides, Unsaturated Carboxylic Acids, Saturated Ketohydroxy Acids, And Saturated Ketone Alcohols Upon Hydrocarbon Oils, Clyde Aubrey Crowley
A Study Of Certain Physical And Chemical Effects Of Aromatic Halides, Unsaturated Carboxylic Acids, Saturated Ketohydroxy Acids, And Saturated Ketone Alcohols Upon Hydrocarbon Oils, Clyde Aubrey Crowley
Master's Theses
No abstract provided.
A Method Of Changing Certain Infinite Series To New But Equivalent Series, Moneta Gunilla Johnson
A Method Of Changing Certain Infinite Series To New But Equivalent Series, Moneta Gunilla Johnson
Mathematics & Statistics ETDs
The purpose of this investigation is to prove that the sum of a series of variable terms of a certain type is equal to a constant plus the sum of another series of variable terms. As a result of this proof it may be hoped that certain series, which so far have not been summed, may be shown equal to a constant plus another series for which the sum is known.