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Articles 67741 - 67770 of 69093
Full-Text Articles in Physical Sciences and Mathematics
A Study Of The Oxidation Stability Of Lubricating Oils, Frank Albert Pepe
A Study Of The Oxidation Stability Of Lubricating Oils, Frank Albert Pepe
Honors Theses
This past year, research work was done on the oxidation of lubricating oils. Since this is the first year that this research project has been carried out, our work was mainly directed towards finding ways of attacking the study of the oxidation of lubricating oils. We have found a few paths which warrant further investigations.
A Study Of The Thallium Dithizone Complex Using Radioactive Tracer Techniques, Ferdinand J. Schuette
A Study Of The Thallium Dithizone Complex Using Radioactive Tracer Techniques, Ferdinand J. Schuette
Honors Theses
In the present work, use has been made of a radioactive isotope of thallium as a tracer in the study of the thallium dithizone complex.
The Lucky Hit Mine Of Jefferson County, Montana, Bruce B. Goddard
The Lucky Hit Mine Of Jefferson County, Montana, Bruce B. Goddard
Bachelors Theses and Reports, 1928 - 1970
Many mines in the Cardwell Mining District have been more or less steady producers of gold, silver, lead and zinc since 18SO. The area first came into prominence with the discovery of gold at the Mayflower Mine in 1896. Soon after the Mayflower discovery, many claims were located in the nearby Saint Paul Gulch area, northeast of Whitehall. The Lucky Hit Mine is located in Saint Paul Gulch area of the Cardwell Mining District.
Nonmetallic Mineral Resources Of Montana (Except Fuels), F. L. Rytlewski
Nonmetallic Mineral Resources Of Montana (Except Fuels), F. L. Rytlewski
Bachelors Theses and Reports, 1928 - 1970
Essentially, the paper is composed of seven parts, each of which concerns a group of related nonmetallic minerals such as ceramic materials, gemstones, or abrasives. Following the data pertaining to the minerals of each group are index mars locating the major mineral deposits which are known to date. Production and reserve figures are listed by tables in cases where such information is available.
The Construction And Operation Of A Universal Specimen Mount With Protective Lead Shield For The Purpose Of Determining Pole Figures Using The Schulz-Decker Transmission Technique, Richard L. Fausner
The Construction And Operation Of A Universal Specimen Mount With Protective Lead Shield For The Purpose Of Determining Pole Figures Using The Schulz-Decker Transmission Technique, Richard L. Fausner
Bachelors Theses and Reports, 1928 - 1970
It was the purpose of this study to construct a universal mount, to construct a protective lead shield, to operate the instrument, and to provide a pole figure using the transmission method of Schulz and Decker. There are at present several lengthy x-ray methods of determining the grain orientation of metals. These methods are mainly photographic. In order to provide a rapid means of obtaining the necessary information concerning the grain orientation of a metal, a universal mount was constructed.
Reactions In The Synthesis Of Indazole, John Earl Sigsby Jr.
Reactions In The Synthesis Of Indazole, John Earl Sigsby Jr.
Honors Theses
This work was undertaken in order to study the reactions that lead to the formation of Indazole. There are many possible variations that effect the final product. Some of them are studied here, such as the effect of heat upon the initial reaction, change of solvent, and the decomposition of the nitroso intermediate.
An Investigation Of Some Changes In The Chemical Composition Of Arterial Tissue Which Correlate With The Development Of Arteriosclerosis, Richard Dee Strickland
An Investigation Of Some Changes In The Chemical Composition Of Arterial Tissue Which Correlate With The Development Of Arteriosclerosis, Richard Dee Strickland
Chemistry and Chemical Biology ETDs
Arteriosclerosis is one of the major health problems confronting people of middle and advanced age. The disorder, commonly called "hardening of the arteries", is a contributing factor in more deaths than any other ailment.
The profound alteration in the physical properties of arteries which comes about as a result of the sclerotic process suggests that equally important changes may take place in the chemical composition of the arterial tissue.
An Investigation Of The Collision Lengths Of Penetrating-Shower-Producing Radiation In Various Materials, James Francis Kenney
An Investigation Of The Collision Lengths Of Penetrating-Shower-Producing Radiation In Various Materials, James Francis Kenney
Physics & Astronomy ETDs
The purpose of this paper is to compile and tabulate some of the experimental data that have been obtained on penetrating showers, and to compare these data with the results that should be expected from the various theories that have been advanced.
Estimates For The Zeros Of Ultraspherical Polynomials, Frank B. Correia
Estimates For The Zeros Of Ultraspherical Polynomials, Frank B. Correia
Mathematics & Statistics ETDs
In this work an attempt is made to develop a new method for estimating the zeros of the Ultraspherical Polynomials. This method presupposes knowledge of the differential equation that these polynomials satisfy. However the method is applicable to a much wider class of functions since it may also be applied to estimating the zeros of the solutions of any homogeneous linear differential equation of the second order which satisfies certain initial conditions.
Geology Of East Grants Ridge, Valencia County, New Mexico, Herbert C. Johnston Jr.
Geology Of East Grants Ridge, Valencia County, New Mexico, Herbert C. Johnston Jr.
Earth and Planetary Sciences ETDs
The field investigation for this report was initiated in October 1952 and was continued intermittently until February 1953. The area was mapped on the scale of 1/31680 with the aid of aerial photographs and Soil Conservation Service planimeteric base map 173. This scale was later enlargened to 1/15840. Rock and mineral specimens were studied with the aid of a hand lens, and the oil immersion method was used to identify some minerals. No thin sections were made. Sedimentary rocks were mapped to complete the geologic picture. No detailed sedimentary sections were measured as emphasis was placed on the Cenozoic igneous …
The Flotation Concentration Of A Complex Low-Grade Lead Zinc Ore, Edward James Fong
The Flotation Concentration Of A Complex Low-Grade Lead Zinc Ore, Edward James Fong
Bachelors Theses and Reports, 1928 - 1970
This report is concerned primarily with the beneficiation of a low-grade complex lead-zinc ore. The depletion of high grade veins has caused the mineral engineer to seek deposits deeper in the earth's crust or to find lower grade deposits. The other alternative has placed more research problems on Mineral Dressing Engineers in particularly the iron, copper, lead and zinc fields.
Studies In The Cinnoline Series, David B. Cox
Studies In The Cinnoline Series, David B. Cox
Chemistry and Chemical Biology ETDs
Recent work by Castle and Kruse (16) has partially elucidated the range of reactivity of the chlorine atom in the compounds 4-chlorocinnoline and 4-chloro-6,7-dimethoxycinnoline. Condensations between the chlorinated cinnolines and certain phenylacetonitriles were found to proceed readily; however, condensations with compounds of the malonic ester type were unsuccessful. It was found that hydrolysis of the condensation product obtained from 4-chlorocinnoline and phenylacetontrile by hot 60% sulfuric acid caused decarboxylation of the intermediate acid, the final product being 4-benzylcinnoline. This compound has a formal resemblance to the basic ring structure of papaverine.
The Crystal Structure Of Ceni, Joseph J. Finney
The Crystal Structure Of Ceni, Joseph J. Finney
Earth and Planetary Sciences ETDs
X-ray diffraction methods were used to determine the cell constants and structure of CeNi. The unit cell is orthohombic. The spcae group is probably Cmcm with aO=3.77 +/- 0.01, bO=10.46 +/- 0.02, cO=4.37+/- 0.01 A. The cell formula is Ce4Ni4. The observed density if 7.51 grams/cm3 and the calculated density is 7.65 grams/cm3, a deviation of 1.8%.
Stratigraphic Relationships Of Cretaceous And Early Tertiary Rocks Of A Part Of Northwestern San Juan Basin, Elmer H. Baltz Jr.
Stratigraphic Relationships Of Cretaceous And Early Tertiary Rocks Of A Part Of Northwestern San Juan Basin, Elmer H. Baltz Jr.
Earth and Planetary Sciences ETDs
No abstract provided.
Stratigraphic Analysis Of The Upper Cretaceous Pictured Cliffs Sandstone In Northeastern San Juan County, New Mexico, John W. Caldwell
Stratigraphic Analysis Of The Upper Cretaceous Pictured Cliffs Sandstone In Northeastern San Juan County, New Mexico, John W. Caldwell
Earth and Planetary Sciences ETDs
The San Juan Basin is located in northwestern New Mexico and southern Colorado and is physiographically a part of the Colorado Plateau province.
The Upper Cretaceous Pictured Cliffs sandstone is exposed around the perimeter of the San Juan Basin and is present throughout the greater part of the Basin in the subsurface. This economically important gas-bearing sandstone is situated in the structural basin in which the strata are upturned on the basinward flanks of the nearby Laramide cliffs.
Five possible origins for the Pictured Cliffs gas are presented: from the underlying Lewis shale, from within the Pictured Cliffs sandstone, from …
Paleontology And Stratigraphy Of The Upper Cretaceous Rocks Between Mount Taylor And The Rio Puerco, New Mexico, Kenneth D. Sharp
Paleontology And Stratigraphy Of The Upper Cretaceous Rocks Between Mount Taylor And The Rio Puerco, New Mexico, Kenneth D. Sharp
Earth and Planetary Sciences ETDs
The area covered in this report lies between Mt. Taylor and the Rio Puerco, and embraces approximately 675 square miles. Much of it is readily accessible by either paved highways or improved roads. The general region is a land of numerous mesas, the largest of which is Mesa Chivato. Sandstones form prominent ridges while shales and alluvium form the valleys. Many volcanic plugs stand out as landmarks.
Stratigraphy And Paleontology Of The Carboniferous Rocks Of The Cedro Canyon Area, Manzanita Mountains, Bernalillo County, New Mexico, Ernest Szabo
Earth and Planetary Sciences ETDs
The discovery of an extension into the Cedro Canyon area, in the northern Manzanita Mountains, Bernalillo County, New Mexico, of strata similar in lithology and stratigraphic position to known pre-Pennsylvanian rocks of nearby areas is included in this report. No diagnostic fossils have been found in these newly discovered strata and therefore definite age assignment can not be made.
The Pennsylvanian strata are dominantly marine and exhibit unusual lighologic variations. These variations are attributed to the environment of a transgressing sea on an unstable shelf.
Measured sections indicate that it is possible to subdivide these strata according to series on …
Geology And Mineralogy Of The Fierro-Hanover District, Grant County, New Mexico., Robert B. O'Sullivan
Geology And Mineralogy Of The Fierro-Hanover District, Grant County, New Mexico., Robert B. O'Sullivan
Earth and Planetary Sciences ETDs
The primary purpose of this report is to describe the petrography of the contact pyrometasomatic ores and rocks from the metamorphic aureole near Fierro. In the course of this work the literature pertaining to the area was read in order to compare the features of metamorphism about Fierro with those about Hanover. One two-day reconnaissance was made in the area.
Host Rocks And Gangue Minerals Associated With Copper Deposits In Plutonic Igneous Rocks, Richard D. Montgomery
Host Rocks And Gangue Minerals Associated With Copper Deposits In Plutonic Igneous Rocks, Richard D. Montgomery
Bachelors Theses and Reports, 1928 - 1970
All of the information on the various districts has come directly from published reports. The investigation was suggested by Mr. Forbes Robertson. The geographical extent of the deposits was confined to the western United States. Many of these deposits are of the disseminated porphyry type. A few of the deposits, such as at Butte, Montana, were of the fissure vein type.
Chelation Of The Rare Earth Elements As A Function Of Ph Using Thenoyltrifluoroacetone, Hugh James Bronaugh
Chelation Of The Rare Earth Elements As A Function Of Ph Using Thenoyltrifluoroacetone, Hugh James Bronaugh
Chemistry and Chemical Biology ETDs
The rare Earth elements, or lanthanides, having atomic numbers 57 through 71 occupy only one space in the periodic chart of the elements. These fifteen elements, which have extraordinarily similar chemical and physical properties, are placed in group three of the periodic table, between barium of group two and hafnium of group four. This series of elements has been the subject of extensive study in the past. The development of atomic energy has significantly increased the interest in the rare earths in the past ten years.
The Variegated Member Of The Morrison Formation In The Southeastern Part Of The San Juan Basin, Valencia County New Mexico, William L. Chenoweth
The Variegated Member Of The Morrison Formation In The Southeastern Part Of The San Juan Basin, Valencia County New Mexico, William L. Chenoweth
Earth and Planetary Sciences ETDs
The strata now designated as Morrison in western New Mexico have been known by a variety of names since the beginning of geological exploration in the West. The nomenclature has become confused due to the many facies that are present. Recent exploration for uranium has renewed interest in the stratigraphy of the Morrison formation.
The Orientation Of Quartz Grains In Unconsolidated Beach Sands Of San Luis Obispo County, California, David V. Pearson
The Orientation Of Quartz Grains In Unconsolidated Beach Sands Of San Luis Obispo County, California, David V. Pearson
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation is to determine the orientation of quartz grains in unconsolidated beach sands, and if possible, to determine some of the physical factors involved in producing the orientation found.
Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue
Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue
Bachelors Theses and Reports, 1928 - 1970
One of the reasons why steel is the most versatile of all the metals available for engineering applications is because of the wide range of properties that can be obtained from it by proper heat treatment.
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Bachelors Theses and Reports, 1928 - 1970
As the field work progressed it became apparent that very little was known of the mineralogical associations of the precious metal constituents of the Marget Ann ore. A mineralogical study in excess of that originally planned was then decided upon to determine the affiliations exhibited by the silver and gold. With these objectives in mind, the laboratory and field work continued.
The Huego (Gym) Limestone, Luna County, New Mexico, Lowell E. Bogart
The Huego (Gym) Limestone, Luna County, New Mexico, Lowell E. Bogart
Earth and Planetary Sciences ETDs
Southwestern New Mexico is characterized by Basin and Range Physiography. Nearly level bolson plains are interrupted irregularly by linear mountain ranges. Sedimentary rocks ranging in age from Cambrian and recent crop out in the mountain areas. Darton (1916) mapped and described a limestone formation, about 1,000 feet thick, which he named Gym limestone. He thought the Gym was restricted in outcrop to Luna County and was distinct from previously described Paleozoic formations. The Gym was originally thought to be Pennsylvanian in age but later on was regarded as Permian. In the restudy of the Gym limestone was the basis of …
The Structural Geology Of The Cerrillos Hills Area, New Mexico, Alan E. Disbrow
The Structural Geology Of The Cerrillos Hills Area, New Mexico, Alan E. Disbrow
Earth and Planetary Sciences ETDs
The earliest major structural deformation recorded in rocks exposed in the Cerrillos area occurred during the Laramie uplift of the Sangre de Cristo Mountains. This resulted in an erosional wedging of Upper Cretaceous strata at a rate of 130 feet per mile. Subsequent deposition of the Eocene Galisteo sand, clay, and gravel overstepped this surface in a sourceward direction.
At the beginning of work on this project the major problem was to determine the geological structure of the Cerrillos Hills. It was felt that a large-scale geologic map of an area extensive enough to reveal the structurally complex center of …
Polarographic Determination Of Germanium, Calvin Leo Stevenson
Polarographic Determination Of Germanium, Calvin Leo Stevenson
Bachelors Theses and Reports, 1928 - 1970
In the past germanium has been determined by either wet methods or by the spectograph; the spectograph being used for the determination of very small amounts of germanium and wet methods used when more than one hundredth of one percent germanium is present. Both of these analytical schemes have weaknesses.
On Air Density Measurements Using The Alpha-Particle Range Method, Gus Tom Zorn
On Air Density Measurements Using The Alpha-Particle Range Method, Gus Tom Zorn
Physics & Astronomy ETDs
The density of the air is in general determined from a knowledge of the pressure and temperature by applying the ideal gas law. This law may be stated in the following for; p=MP/TR, where p is the density of the air in gm/cm3, M is the gram molecular weight, P is the pressure in dynes/cm2, T is the temperature in degrees kelvin and R is the universal gas constant in ergs per degree absolute for one mole. This method is also used in the determination of the air density as a function of the height in …
Fluorite Deposits In The Dry Creek District, Near Superior, Mineral County, Montana, Russell M. Corn
Fluorite Deposits In The Dry Creek District, Near Superior, Mineral County, Montana, Russell M. Corn
Bachelors Theses and Reports, 1928 - 1970
Fluorite was discovered in the. Dry Creek District, Mineral County, in 1943 and the first commercial production of this mineral in Montana waS recorded from this locality.
Concentration Of Tungsten Ore From The Potosi Mining District, Ted S. Jordan
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.