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Articles 1891 - 1920 of 2077
Full-Text Articles in Physical Sciences and Mathematics
A Study Of Placer Tin Materials From Southern Thailand, Somkiat Ganthavee
A Study Of Placer Tin Materials From Southern Thailand, Somkiat Ganthavee
Masters Theses
"This thesis deals with a series of investigations of placer tin samples from a Chinteik's Tin-dredge, Gnaw District, Ranong Province, and the Tin-Pet mine, Phang-gna Province, in southern Thailand.
A brief summary of the geography and geology of Thailand as a whole has been given as a general introduction to the source of the materials studied in this thesis.
The results of sieve analyses have shown that the sluice boxes do not effectively concentrate the cassiterite grain below 0.147 mm. from the rough concentrate treated in the tin-dressing shed.
It has been found that roundness and shape determinations of quartz …
Foraminifera Of The Cenozoic And Recent Genus Sphaerogypsina Galloway, Wayne C. Horton
Foraminifera Of The Cenozoic And Recent Genus Sphaerogypsina Galloway, Wayne C. Horton
Masters Theses
"The morphology of Sphaerogypsina as seen in thin section affords various characters useful in classification] 1) arrangement and composition of the wall (calcareous-perforate, radially crystalline); 2) layering of wall (like Gypsina, without layering or black line, having only microlamellae); 3) shape of test (always spherical); and 4) specific characters: size of test, order/unorder ratio, size of chambers, wall thickness, pore diameter, and type of embryonic apparatus.
Correlation of the above characters has allowed recognition of two new species. Comparisons with other genera strongly suggest placing the genus in the Family Gypsinidae (nom. correct.) rather than in the …
Seismic Investigation Of Flint Clay Deposits In East Central Missouri, Roland D. Dayley
Seismic Investigation Of Flint Clay Deposits In East Central Missouri, Roland D. Dayley
Masters Theses
"Seismic refraction surveys were conducted in several localities within the east central Missouri clay districts in order to determine the applicability and economy of this method as a clay exploration tool. Results of these surveys revealed that the sink-type clay deposits possess lithologic and structural characteristics that lend themselves favorably to this method of exploration.
Seismic records obtained from profiles shot across known deposits indicate that several factors other than velocity contrast serve to produce apparent seismic anomalies.
Some unforeseen time loss and expense was encountered because of malfunctions of the seismic equipment employed, which necessitated the purchase and installation …
Variation Of Sensitized Fluorescence With Penetration Depth Of Incident 2537a Radiation, George Grayson Robinson
Variation Of Sensitized Fluorescence With Penetration Depth Of Incident 2537a Radiation, George Grayson Robinson
Masters Theses
"An investigation of the sensitized fluorescence of a thallium and mercury mixture using a variable depth cell and photomultiplier type of detection is discussed. Data are given to indicate the variation of the intensity of the 3519A thallium line as a function of thallium temperature, as a function of mercury temperature, and as a function of cell depth. Explanations of results require the use of generally accepted ideas concerning energy transfer, emission, and absorption."
A Study Of The Colloidal Properties Of Zirconium And Promethium By Electrodialysis And Liquid-Liquid Extraction, James N. Click
A Study Of The Colloidal Properties Of Zirconium And Promethium By Electrodialysis And Liquid-Liquid Extraction, James N. Click
Masters Theses
"The purpose of this investigation was to study the solution chemistry of zirconium by investigating the colloidal behavior of natural zirconium and zirconium-95, utilizing electrodialysis and liquid-liquid extraction techniques. Also incorporated into this study was the investigation of optimum conditions for the extraction of the natural zirconium and zirconium-95 with thenoyl trifluoracetone. A limited amount of work was done on the colloidal nature of promethium-147"--Introduction, pages 2-3.
A Study Of The Behavior Of Zirconium In Aqueous Solutions And The Separation Of Radioactive Zirconium By Electrodialysis, Charles William Brauer Jr.
A Study Of The Behavior Of Zirconium In Aqueous Solutions And The Separation Of Radioactive Zirconium By Electrodialysis, Charles William Brauer Jr.
Masters Theses
"Nuclear reactor installations designed for power production must of necessity operate at higher energy levels than their experimental precursors. As these facilities increase in number, better solutions must be found for both technical and economic problems.
The disposal of waste materials is of primary importance and will require greater effort if satisfactory disposal methods are to keep pace with the increase of waste materials, produced by the increasing number of new nuclear facilities. The radioactive materials present in this waste material may constitute a valuable by-product from these operations if suitable and economic recovery procedures are developed. If the development …
Geology Of The Esterbrook Area, Converse And Albany Counties, Wyoming, Michael Nolan Greeley
Geology Of The Esterbrook Area, Converse And Albany Counties, Wyoming, Michael Nolan Greeley
Masters Theses
"The Esterbrook area lies within the Laramie Range in Converse and Albany Counties, Wyoming. Exposures include Precambrian metamorphic and igneous rocks, the Tertiary White River formation, and Quaternary alluvium.
Hornblende schist and mica-quartz schist comprise the Precambrian metamorphic rocks. Foliation planes of these rocks trend northeast and dip steeply to the southeast. Metamorphic rocks of younger age probably lie to the southeast.
A distinctive, Precambrian silicic pluton of biotite-leucogranite with marginal zones of muscovite-leucogranite and alaskite passively intrudes the metamorphic rocks, generally parallel to the foliation trends. Numerous granite pegmatites show a zonal distribution around the pluton and appear to …
Studies Involving Modification Of The Megregian Method Of Fluoride Determination And Application To Fluoride Balance Studies In Infants, Gene R. Wright
Studies Involving Modification Of The Megregian Method Of Fluoride Determination And Application To Fluoride Balance Studies In Infants, Gene R. Wright
Masters Theses
Introduction
At the request of Dr. Frederick Margolis, M.D., and in association with The Upjohn Company, this research problem was initiated as a participation in the investigation of whether or not fluoride ingested as a constituent of the Upjohn 47-M liquid vitamin preparation is retained in an infant's body to the same extent as is fluoride ingested as the sodium salt by itself--either in solution or in tablet form. The retention patterns may be studied indirectly by measuring the amounts of fluoride excreted in the urine and in the feces during each of a series of equal time intervals after …
Ground Water Investigation In The Southern Half Of Franklin County, Missouri, Kemal Piskin
Ground Water Investigation In The Southern Half Of Franklin County, Missouri, Kemal Piskin
Masters Theses
"Increasing population and industrialization in Franklin County, Missouri, has led to increased demand for water. Much of this demand will be satisfied from ground water resources. Although the general geology of Franklin County has been mentioned in several publications, no detailed study of structure and ground water geology had been done. This thesis consists of study of stratigraphy, lithology, and geologic structure, and analysis of well log data to determine occurrence and availability of ground water, in the southern half of Franklin County.
Stratigraphy and lithology is compiled from previous literature, modified to agree with well log data. Structural geology …
K₂O/Na₂O Content As A Possible Index To The Chronological Sequence Of Some Precambrian Igneous Rocks Of Missouri, Erwin Joseph Mantei
K₂O/Na₂O Content As A Possible Index To The Chronological Sequence Of Some Precambrian Igneous Rocks Of Missouri, Erwin Joseph Mantei
Masters Theses
"Flame photometric analyses for K₂O and Na₂O were run on 31 samples of the Precambrian igneous rocks of Missouri. Samples were collected from the field, physically prepared and dissolved by a standard method and a modified standard method of rapid silicate analyses. The K₂O, Na₂O values obtained are averages between two methods of analyses. The modified method reduces by 80% the time required to chemically digest a rock sample. The results for both methods are not significantly different. Curtin and Company Advanced Flame Photometer was used.
Results have been plotted on graphs and a chronological sequence for the named Precambrian …
Application Of Digital Computer To Magnetic Data Interpretation Using Surface Integral Method, Afif Hani Saad
Application Of Digital Computer To Magnetic Data Interpretation Using Surface Integral Method, Afif Hani Saad
Masters Theses
"A simple method is developed for the calculation of the magnetic effect due to three-dimensional bodies. The method is based on the use of surface integration instead of volume integration. Thus, any three-dimensional body can be considered as having two surfaces, upper and lower, with magnetic pole distributions. Simple equations based on potential theory have been derived for the calculation of the vertical component and total intensity due to these surface distributions of poles. The anomalous field of the body can be obtained by subtracting the effect due to one of the surfaces from that of the other.
The method …
Study Of The Copper-Uranium Deposits At Vilcabamba, Department Of Cuzco, Peru, Oscar Aguilar
Study Of The Copper-Uranium Deposits At Vilcabamba, Department Of Cuzco, Peru, Oscar Aguilar
Masters Theses
"Uranium has been known in the Vilcabamba district of Cuzco, Peru since 1954. Copper ores of high silver content were worked by the Spaniards during the seventeenth and the early eighteenth centuries, At the beginning of the twentieth century these ores were worked intermittently; during the last fifty years no mining operation has been going on.
The oldest rocks in the thesis area consist of Ordovician phyllites. The presence of Devonian in the area is questionable, but has been recognized 5 km. away from the thesis area. A conglomerate of limited lateral extent of Mississippian age overlies the Devonian (?) …
The Separation Of Germanium From Lead, Cadmium, And Zinc By Ion Exchange, Myra Sue Anderson
The Separation Of Germanium From Lead, Cadmium, And Zinc By Ion Exchange, Myra Sue Anderson
Masters Theses
"The object of this study was to investigate the ion exchange behavior of germanium in order to find a quantitative separation method applicable to the analysis of germanium in zinc ores.
Germanium had been predicted and described as eka-silicon by Mendeleeff, and was discovered by Winkler in 1886. The importance of the metal has increased very much since World War II because of its use as a semiconductor in diodes and transistors.
All commercial scale germanium is now produced as a by-product of base metal processing. Although the United States Bureau of Mines is conducting a program for the recovery …
Investigation And Development Of Ground Water Of Chalone Creek, (Pinnacles National Monument, California), Donald Lee Brown
Investigation And Development Of Ground Water Of Chalone Creek, (Pinnacles National Monument, California), Donald Lee Brown
Masters Theses
"The Pinnacles National Monument is located in San Benito and Monterey Counties about 130 highway miles south of San Francisco, California. Because of unusual patterns in volcanic rocks, the Monument was set aside as a recreation area on January 16, 1908, by President Theodore Roosevelt. It encompasses an area of approximately 12,818 acres.
Water quality and supply problems were experienced at the Monument in the few years prior to 1961. In 1961, a collection trench system was installed to alleviate the water supply condition. A horizontal trench system, 215 feet long and four feet below the dry season water table, …
Stylolites And Sedimentary Structures In The Cave-In-Rock Fluorspar District, Southern Illinois, Won Choon Park
Stylolites And Sedimentary Structures In The Cave-In-Rock Fluorspar District, Southern Illinois, Won Choon Park
Masters Theses
"This thesis deals with stylolites, slump structures, sulfides in the oolitic limestone, and geometry of the bedded fluorite deposits in the Cave-In-Rock fluorspar district, southern Illinois. Stratigraphic zones studied were: 1) the upper part of the lower Fredonia limestone member, 2) the upper part of the upper Fredonia limestone member,,and 3) the upper part of the Renault formation.
Geometry of the ore rocks and related structures was investigated. Most of the ore is layered and constitutes part of the sedimentary strata.
Slump structures were observed and studied in detail. Most of the slump structures show evidence which indicates a sedimentary …
An Investigation Of Lehmer's Method For Finding The Roots Of Polynomial Equations Using The Royal-Mcbee Lgp-30, James W. Joiner
An Investigation Of Lehmer's Method For Finding The Roots Of Polynomial Equations Using The Royal-Mcbee Lgp-30, James W. Joiner
Masters Theses
“The solution of the general polynomial equation f (x) = O, where f(x) = anxn + an-1xn-1 + … + a1x = ao, has received the attention of many mathematicians for hundreds of years and is at present in a very highly developed state. Even a cursory examination of the literature will reveal many volumes on this subject. However, this study is concerned primarily with the numerical methods for solving polynomial equations, hence the classical methods will be treated here only as they contribute to this field.
Virtually all of …
Syntheses And X-Ray Investigations Within The System Fes₂-Cos₂, Samuel Shu Mou Chan
Syntheses And X-Ray Investigations Within The System Fes₂-Cos₂, Samuel Shu Mou Chan
Masters Theses
"Pyrite (FeS2), cattierite (CoS2), and various transitional members of the solid solution compounds were prepared. The methods used are as follows:
First, sulfides of cobalt, iron, or cobalt-iron were obtained by precipitation from a mixture of the cobalt chloride and/or ferrous sulfate in an aqueous solution. The dried precipitates were then mixed with an equal weight amount of sulfur and placed into silica glass tubes. After evacuation, they were filled with hydrogen gas of 3/4 of atmospheric pressure and sealed. The samples were then heated up to 500°C (for FeS2), 650°C (for FeS2 …
Buttressing Effect In 3, 3' -Disubstituted-2, 2' -Three-Carbon-Atom Bridged Biphenyls, Yunn Hui Chiang
Buttressing Effect In 3, 3' -Disubstituted-2, 2' -Three-Carbon-Atom Bridged Biphenyls, Yunn Hui Chiang
Masters Theses
Introduction
The configuration of biphenyl has been the subject of much investigation and many recent reviews (1, 5, 6, 7, 8, 17, 21, 22). Of particular interest has been the configuration of 2,2' -bridged biphenyl derivatives. The preparation of an optically active 2,2' -three-carbon-atom-bridged biphenyl having an ultraviolet absorption maximum at 250 mμ, has been recently described (14). Although the compound was easily racemized, this property requires that a non-planar configuration be assigned to this biphenyl (I). Furthermore, this ultraviolet spectra indicates that inter-ring conjugation must exist in the non-planar configuration.
The Reaction Of N, N-Disubstituted Ketohydrazones With Lead Tetraacetate, Elisabeth Cerda
The Reaction Of N, N-Disubstituted Ketohydrazones With Lead Tetraacetate, Elisabeth Cerda
Masters Theses
Introduction
The reaction of lead tetraacetate with compounds of the following general structure (not able to enter here) was first reported by Iffland and Criner (12). In the case of ketoximes (A = oxygern), a nitrosoacetate was produced which was oxidized to the more stable acetoxy-nitrocompound as follows: (not able to enter here)
The generality of the reaction was established by preparation of a series of acetoxy-nitrocompounds from alicyclic and aliphatic ketoximes. The apparently similar reaction of cyclohexanonephenylhydrazone (A = N-¢) with lead tetraacetate was reported, but the reaction product was not identified.
Certain Trace Element Distribution In The Searchlight, Nevada Quartz Monzonite, Clark County, Nevada, Jai Nandan Shrivastava
Certain Trace Element Distribution In The Searchlight, Nevada Quartz Monzonite, Clark County, Nevada, Jai Nandan Shrivastava
Masters Theses
"The once prosperous gold, silver, copper and lead mines of the Searchlight mining district, Nevada, are situated along the south and western margins of a large quartz monzonite body. This intrudes the Precambrian gneisses and younger lava flows. Associated mineral veins show an eccentric type of zoning around the intrusive.
Seven rock samples of the quartz monzonite representing different parts of the intrusive were analyzed petrographically and spectrographically. Modal analyses and various types of rock alteration were investigated petrographically. Spectrochemical analyses of the rock samples and their major minerals were carried out for certain trace elements. A semi-quantitative method was …
Sedimentary Features And Geochemistry Of The Sulphide Facies In The Transition Between The Lamotte Sandstone And The Bonneterre Formation In The Fredericktown Area, Madison County, Missouri, Farouk El Baz
Masters Theses
"SCOPE AND PURPOSE The Lead Belt area of southeast Missouri, which is nearly 40 km. long and 10 km. wide, is considered, at the present time, the most important lead district in the world. Lead has been mined in this area by the natives prior to 1720, and almost continuously up to the present day. A variety of sulphides are mined from different places in the district.
The sulphide deposits in the Lead Belt are considered to be typical examples of the Mississippi Valley Type Deposits, which are distributed all over the world. As in practically all the Mississippi Valley …
Certain Features Of Alteration In The Michigan Lavas And Their Genetic Interpretation, Peethambaram Doraibabu
Certain Features Of Alteration In The Michigan Lavas And Their Genetic Interpretation, Peethambaram Doraibabu
Masters Theses
"The origin of the alteration and copper mineralization in the Keweenawan lavas of the Upper Peninsula of Michigan is one of the well known controversial topics in Economic Geology. The literature on this problem is most extensive and an attempt was made in this thesis to first review as many aspects of the discussion as appeared to be necessary. This portion is necessarily extensive, and it is hoped that some new light has been thrown here on some patterns of approach or thought which, today, can hardly be called scientific.
Next, the observations made in the field, on hand specimens …
Geology Of The East-Central Portion Of The Nelson Quadrangle, Clark County, Nevada, Tedral Kantor
Geology Of The East-Central Portion Of The Nelson Quadrangle, Clark County, Nevada, Tedral Kantor
Masters Theses
"The purpose of this investigation was to determine the unusually complex geology of a little-known area south of the Eldorado mining district, southern Clark County, Nevada. The area, mapped at a scale of 1:24000, comprises a segment of the northerly-trending Eldorado mountains in the southeast corner of the Great Basin. This rugged desert area is on a drainage divide between the Great Basin and the Colorado River. The rocks of the area consist of Precambrian gneisses and schists invaded by successive generations of Upper Cretaceous (?) - Tertiary igneous rocks. The older rocks, mainly biotite-chlorite gneisses, have resulted from high-grade …
A Theoretical Investigation Of Periodic Precipitation, Jack M. Scrivner
A Theoretical Investigation Of Periodic Precipitation, Jack M. Scrivner
Masters Theses
"The problem of periodic precipitation in solution or gel is considered from the standpoint of supplementing the simple diffusion equation with chemical reaction rate terms. This addition has the effect of making the differential equations of the process non-linear.
The system of equations admits of a periodic, steady-state solution under certain conditions, but lack of experimental values for the parameters prohibits a definite statement as to whether or not the model is valid"--Abstract, page ii.
The Magnetic Monopole, Thomas E. Kemple
The Magnetic Monopole, Thomas E. Kemple
Masters Theses
"Since Dirac has shown that the concept of a magnetic monopole follows from the fundamental laws of quantum mechanics and that it imposes quantization of electric charge, one has reason for taking the magnetic monopole seriously. Such particles, if they exist, would also give symmetry to Maxwell's equations.
A comprehensive review of the literature is presented and all known properties of magnetic poles are discussed. Scattering of mono- poles by heavy nuclei is analyzed in detail and definite mathematical relations are established. All previous experimental work known is outlined and discussed. Definite criteria for identification of monopole tracks in a …
Evaluation Of The Force Constants Of Non-Polar Gases From Viscosity Data, Kei-Sin Wei
Evaluation Of The Force Constants Of Non-Polar Gases From Viscosity Data, Kei-Sin Wei
Masters Theses
"The analytical expressions for the transport coefficients (i.e. viscosity, thermal conductivity, and diffusivity) of an ideal gas can be derived from the kinetic theory of gases. It is also possible to make these analytical expressions adequate for real gases if the intermolecular forces of attraction and repulsion for these gases have been taken into consideration.
The intermolecular forces have been studied by many investigators. The Lennard-Jones potential is one of the most realistic semi-empirical statements which represents particularly the intermolecular forces of attraction and repulsion for non-polar gases.
The values of the Lennard-Jones potential parameters or the force constants of …
Normal Incidence - Grazing Incidence Spectrograph For The Vacuum Ultraviolet, J. Kirston Henderson
Normal Incidence - Grazing Incidence Spectrograph For The Vacuum Ultraviolet, J. Kirston Henderson
Masters Theses
"Presentation of Design.
This thesis presents the design for a combination normal incidence - grazing incidence spectrograph for use in the vacuum ultra-violet and soft x-ray portions of the electromagnetic spectrum. The instrument described was designed and constructed as a partial fulfillment of the requirements for the master of science degree from The Missouri School of Mines and Metallurgy.
Design Details.
Included in this thesis is a complete set of all detailed drawings and information required for either effective use or duplication of this instrument. Complete discussions of the design, operating procedures, difficulties encountered during construction and suggestions for future …
Occurrence Of Mineralized Ground Water In Southern St. Louis And Jefferson Counties, Missouri, Willard Glennon Owens
Occurrence Of Mineralized Ground Water In Southern St. Louis And Jefferson Counties, Missouri, Willard Glennon Owens
Masters Theses
"Mineralized ground water occurs at some localities in southeastern St. Louis and northern Jefferson counties, Missouri. This water is usually undesirable and is detrimental to development of ground water resources.
Water well records in the offices of the Missouri Geological Survey and Water Resources provided data for a study of structure, lithology and occurrence of ground water. Water well drillers and property owners were interviewed to obtain additional information concerning drilling problems and quality of water.
Geologic cross-sections, subsurface contour maps and isochlorinity maps aided the study of lithology, structure and areal distribution of mineralized ground water. Relationship is suggested …
Oxygen Permeability Of Free Paint Films, Janice I. Kellerman
Oxygen Permeability Of Free Paint Films, Janice I. Kellerman
Masters Theses
"As early as the mid 1800’s investigations were performed on the gas passage through rubber, but it is only comparatively recently that plastic polymeric materials have come into prominence. One interesting aspect of much experimentation begun was that of permeability, and it was soon evident that, in general, polymeric materials have extremely low permeability of gases. This is, in essence, the basis for use of plastics as packaging materials, balloons, and in many other designs and fabrications where it is desirous and/or necessary to exclude air.
There are several variables which must be taken into consideration in the evaluation of …
The Fundamental Atomic Particles, Ransom Bloomer Beers
The Fundamental Atomic Particles, Ransom Bloomer Beers
Masters Theses
No abstract provided.