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Articles 57811 - 57840 of 58447
Full-Text Articles in Entire DC Network
The Thermal Conductivity Of Sodium Chloride At Elevated Temperatures, Howard Martin Brown
The Thermal Conductivity Of Sodium Chloride At Elevated Temperatures, Howard Martin Brown
Masters Theses
"The thermal conductivity of solids has been attributed to a combined effect of the quantized vibration of the lattice points, called phonons, and the flow of valence electrons. In nonconductors the thermal conductivity is due almost entirely to phonons, as was shown by Debye, whereas in metals the conductivity is due mostly to the flow of valence electrons. After Debye, Peierls calculated the lattice conductivity at elevated temperatures using quantum mechanics and demonstrated that it is proportional to 1/T. There are not enough data available to substantiate any theory but what data there are seem to indicate a mixed conductivity …
Chromatographic Studies., Richard Thomas Moravek
Chromatographic Studies., Richard Thomas Moravek
LSU Historical Dissertations and Theses
No abstract provided.
The Construction Of A Recording Raman Spectrometer And An Analysis Of The Vibrational Spectrum Of Bromobenzene And Its Monodeuterium Isomers., William Ward Daniels
The Construction Of A Recording Raman Spectrometer And An Analysis Of The Vibrational Spectrum Of Bromobenzene And Its Monodeuterium Isomers., William Ward Daniels
LSU Historical Dissertations and Theses
No abstract provided.
Morphology And Systematic Position Of Some Anomalinid Foraminifera, Billy G. Deaver
Morphology And Systematic Position Of Some Anomalinid Foraminifera, Billy G. Deaver
Masters Theses
"Morphological studies of the following species are the basis for a partial revision of the Family Anomalinadae: Anomalina acuta Plummer, A. midwayensis (Plummer), A. pseudopapillosa Carsey, A. vulgaris (Plummer), Anomalinoides pinguis (Jennings), Cibicides alleni (Plummer), C. beaumontianus (d’Orbigny), c. harperi (Sandidge), Cibicidina danvillensis (Howe and Wallace), Planulina correcta (Carsey), and P. dumblei (Applin); a description of Stensioina americana Cushman and Dorsey, discorbid foraminifer, is included for comparison. The classificatory position and incomplete content of the family are: Superfamily Discorbidea; Family Anomalinidae; Subfamily Anomalininae (revised) -- with ventral supplementary apertures: Anomalina , Planulina ; Subfamily Cibicidinae -- with dorsal supplementary apertures: …
Correlation Functions For Use In Small Angle X-Ray Scattering, James Edwin Thomas Jr.
Correlation Functions For Use In Small Angle X-Ray Scattering, James Edwin Thomas Jr.
Masters Theses
"Thus, the determination of the structure of the material, and obtaining a distribution function which will enable the theoretical scattering to be predicted is the major problem.
In this work the diffraction material shall be considered to contain scattering regions of identical geometrical forms at such a distance from one another that they will essentially scatter the incident beam independently of their closest neighbor. An effort will be made to determine a correlation function characteristic of these forms, which may be interpreted as a distribution function, that might allow the low angle scattering pattern to be predicted. This correlation function …
The Monadnock Volume 29, Number 1, December 1954, Clark University Geographical Society
The Monadnock Volume 29, Number 1, December 1954, Clark University Geographical Society
The Monadnock (Clark Geographical Society)
Volume 29, Issue 1 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).
An Experiment Of The Time Variations Of Cosmic Rays Underground, Mercedes Merner Agogino
An Experiment Of The Time Variations Of Cosmic Rays Underground, Mercedes Merner Agogino
Physics & Astronomy ETDs
Ever since the discovery of cosmic rays, investigations of time variations in their intensity have been carried out in the hope of obtaining information on their nature and origin. Early experiments were somewhat contradictory, but it was soon clear that any variation present could be no longer than a few percent at the most. This meant that experiments had to be carefully planned and carried out over a long period of time to attain the statistical accuracy necessary for clear-cut results. In addition, the influence of the atmosphere and the earth's magnetic field made it very difficult to interpret the …
The Measurement Of The Concentration Of Ozone In The Atmosphere By The Oxidation Of Silver, Albert Goodman
The Measurement Of The Concentration Of Ozone In The Atmosphere By The Oxidation Of Silver, Albert Goodman
Physics & Astronomy ETDs
Under conditions of standard temperature and pressure, it has been found that no reaction occurs between silver and oxygen, nor between silver and ozone. When the temperature of the silver is raised, however, it is oxidized by ozone but not by oxygen. Upon raising the products of the reaction to a still higher temperature, they decompose into silver and ordinary oxygen. By measuring the amount of oxygen thus produced, it would be possible to calculate the amount of ozone involved originally.
The Synthesis Of 2-Methyl-3, 4-Benzpyrene And 2, 8-Dimethyl-3, 4-Benzpyrene, James W. Patton
The Synthesis Of 2-Methyl-3, 4-Benzpyrene And 2, 8-Dimethyl-3, 4-Benzpyrene, James W. Patton
Chemistry and Chemical Biology ETDs
In 1933 Cook, Hewett and Hieger (1) isolated a carcinogenic hydrocarbon from coal tar thought to be 3,4-benzpyrene (I).
Evaluations Of Two Proposed Mechanisms Of Cation Adsorption By Silicate Minerals, Norman D. Larsen
Evaluations Of Two Proposed Mechanisms Of Cation Adsorption By Silicate Minerals, Norman D. Larsen
Theses and Dissertations
Previous work done at the Brigham Young University by Andelin^1, Roberts^2, and Olsen^3, has established the mechanism by which xanthate collectors are adsorbed on molybdenite ores to produce the hydrophobic surfaces necessary for flotation. This thesis is an attempt to better understand the mechanism by which the silicate minerals, which are found in conjunction with the ores, become hydrophyllic and as a result are not floated when in contact with air bubbles. It has been previously established that silicate minerals do adsorb cations on their surfaces^4. The present study has been undertaken to more fully understand the mechanism by which …
The Structure Of A Shock Front In Argon, John W. Bond Jr.
The Structure Of A Shock Front In Argon, John W. Bond Jr.
Physics & Astronomy ETDs
If a one-dimensional shock wave travels through argon, the translational degrees of freedom of the atoms are immediately excited and reach translational equilibrium within two collision lengths. If the shock velocity is sufficiently high, energy will be transferred from the translational degrees of freedom to those of electronic excitation and ionization until complete thermal equilibrium exists. The region between the first disturbance in front of the shock and the point at which thermal equilibrium is first realized is the shock front.
Escrow Instructions To The First National Bank Of Nevada Regarding The Transfer Of Las Vegas Water Production From The Union Pacific Railroad To The Las Vegas Valley Water District, June 21, 1954, First National Bank Of Nevada, Los Angeles & Salt Lake Railroad Company, Las Vegas Valley Water District, Las Vegas Land And Water Company (Las Vegas, Nev.), Union Pacific Railroad Company
Escrow Instructions To The First National Bank Of Nevada Regarding The Transfer Of Las Vegas Water Production From The Union Pacific Railroad To The Las Vegas Valley Water District, June 21, 1954, First National Bank Of Nevada, Los Angeles & Salt Lake Railroad Company, Las Vegas Valley Water District, Las Vegas Land And Water Company (Las Vegas, Nev.), Union Pacific Railroad Company
Publications (WR)
Escrow instructions for the transfer of Las Vegas water production from the Union Pacific Railroad to the Las Vegas Valley Water District. Contract between the Los Angeles & Salt Lake Railroad, the Union Pacific Railroad, and the Las Vegas Land and Water Company.
The Exchange Of Antimony Between Antimony Trichloride And Antimony Pentachloride In Carbon Tetrachloride Solution, Franklin Brett Barker
The Exchange Of Antimony Between Antimony Trichloride And Antimony Pentachloride In Carbon Tetrachloride Solution, Franklin Brett Barker
Chemistry and Chemical Biology ETDs
In the investigation of any chemical reaction, the main points of interest are the conditions of equilibrium, the rate at which equilibrium is approached, and the mechanisms by which the reaction occurs. The first of these is determined by the standard free energy change, a thermodynamic quantity which depends only upon the initial and final states of the system. However, two reactions having the same value of the standard free energy change may approach equilibrium at radically different rates, one being practically instantaneous and the other almost infinitely slow. The field of chemical kinetics is concerned with the study of …
Cosmic Ray Intensity At Balloon Altitudes, Kenneth R. Greider
Cosmic Ray Intensity At Balloon Altitudes, Kenneth R. Greider
Physics & Astronomy ETDs
In the investigation of cosmic rays at balloon altitudes, it is important to recognize the various factors that affect the total intensity at any point in the atmosphere. The three main factors are: (1) Atmospheric influence: variation of intensity with atmospheric depth, (2) Geomagnetic influences: variations of intensity with the geomagnetic latitude, and (3) Extraterrestrial influences: periodic and non periodic variations of intensity.
Diffuse Reflection Of Light, Francis L. Bentsen
Diffuse Reflection Of Light, Francis L. Bentsen
Physics & Astronomy ETDs
This thesis describes an attempt to determine the feasibility of measuring the ozone content in the air by absorption of light over a long path.
A Fresnel Half-Period Zone Plate For Focusing Electromagnetic Energy In The One Meter Wave-Length Region, Henry George Oltman Jr.
A Fresnel Half-Period Zone Plate For Focusing Electromagnetic Energy In The One Meter Wave-Length Region, Henry George Oltman Jr.
Physics & Astronomy ETDs
Theory and past experience predict, (1) that the zone plate should form images analogous to the optical refracting lens, (2) that focal length and gain are determined by the number of zones in a given aperture, (3) and that the resolving power is a function of the aperture dimension and of the wavelength of the radiation.
Records Of Wells Drilled For Oil And Gas In New Mexico, George H. Dixon
Records Of Wells Drilled For Oil And Gas In New Mexico, George H. Dixon
Earth and Planetary Sciences ETDs
This report contains information compiled from data in the files of the U.S. Geological Survey, the New Mexico Bureau of Mines and Mineral Resources, and oil and gas companies on nearly 3,000 of the more than 13,000 wells drills in New Mexico prior to September 1, 1953. The tabulation is believed to include all unsuccessful wildcat test wells, most of the unsuccessful field extension wells, and most of the discovery wells for the various producing areas, even though they may be shut or abandoned at the present time. In addition, the list contains some deep tests and some wells representative …
Analysis Of Zodiacal Light Recordings, Mclane Downing
Analysis Of Zodiacal Light Recordings, Mclane Downing
Physics & Astronomy ETDs
The object of the zodiacal light work at Capillo Peak is to take comparable records of zodiacal light intensities over an extended period of time. In order to obtain extra-terrestrial isophotes from the original recordings, corrections for loss of light intensity in the atmosphere must be made.
Volume 1, Number 2 - May 1954
The Entropy
The Entropy (also published as the Providence College Journal of Physics and Chemistry) was an undergraduate scholarship journal published by the Phi Chi Club of Providence College. (Volume 1, Number 2 - May 1954 - 10 pages in total.)
The Chromatographic Purification Of Human Red Blood Cell Acetylcholinesterase, Richard P. Dunkley
The Chromatographic Purification Of Human Red Blood Cell Acetylcholinesterase, Richard P. Dunkley
Theses and Dissertations
A process of column chromatography of human erythrocyte acetylcholinesterase, using a cationic exchange resin, was investigated as a possible method for the primary partial purification of the enzyme on a large scale. The investigation was based, first; on a detailed study of the enzymatic stability to variation in hydrogen-ion and salt concentrations for periods of time extending to forty eight hours and, second; on an investigation of the degree of adsorption by the resin of the enzyme at various pH values within the pH range of enzyme stability. A method for the analysis of the enzyme activity of large numbers …
Exchange Reactions Of The Transuranium Elements Section 1. Am(Iii)-Am(V)-Am(Vi), Am(Iii)-Am(V), And Am(V)-Am(Vi), Thomas K. Keenan
Exchange Reactions Of The Transuranium Elements Section 1. Am(Iii)-Am(V)-Am(Vi), Am(Iii)-Am(V), And Am(V)-Am(Vi), Thomas K. Keenan
Chemistry and Chemical Biology ETDs
No exchange work prior to this dissertation has been reported on the americium system. Neptunium exchange is presently being studied by J. C. Hindman and co-workers at the Argonne National Laboratory, but has not been completely reported. Study of uranium exchange, which is still in an unsatisfactory state, has been limited to the U(IV)-(VI) exchange.
Volume 1, Number 1 - January 1954
Volume 1, Number 1 - January 1954
The Entropy
The Entropy (also published as the Providence College Journal of Physics and Chemistry) was an undergraduate scholarship journal published by the Phi Chi Club of Providence College. (Volume 1, Number 1 - January 1954 - 22 pages in total.)
The Synthesis Of 10-Methyl-3, 4-Benzpyrene And 8,10-Dimethyl-3, 4-Benzpyrene, Jules Adelfang
The Synthesis Of 10-Methyl-3, 4-Benzpyrene And 8,10-Dimethyl-3, 4-Benzpyrene, Jules Adelfang
Chemistry and Chemical Biology ETDs
In 1953 Cook, Hewett, and Rieger found a highly carcinogenic hydrocarbon in coal tar. By a variety of solvent extraction methods, fractional distillation, and crystallization several pure hydrocarbons were isolated from the crude pitch. Two new pentacyclic aromatic hydrocarbons were isolated and since only small quantities of them were available it was decided to ascertain their structures by synthesis instead of degradetive experiments. The hydrocarbon samples were obtained with great difficulty from two tons of crude pitch. The problem was simplified since ten of the possible fifteen pentacyclic hydrocarbons were known. From certain similarities of these hydrocarbons to perylene its …
A Study Of The Emission And Absorption Spectra Of Nacl And Kcl Between 100 A And 1000 A, Paul Henry Blackmon
A Study Of The Emission And Absorption Spectra Of Nacl And Kcl Between 100 A And 1000 A, Paul Henry Blackmon
Masters Theses
"This investigation was begun with the idea of obtaining the emission and absorption spectra of NaCl and KCl in the region between 100 A and 1000 A. From these data, it is hoped that useful information concerning the energy levels of these two substances may be obtained.
The vacuum ultraviolet region is rather difficult to investigate because of the necessity of removing all air, lenses and other absorbing material from the light path. Many writers have enumerated the problems involved and some have indicated that much work still needs to be done in the vacuum ultraviolet.
In order to do …
Period Relations For Picard Integrals Defined On A Special Class Of Kaehler Manifolds., Joseph Clement Wilson
Period Relations For Picard Integrals Defined On A Special Class Of Kaehler Manifolds., Joseph Clement Wilson
LSU Historical Dissertations and Theses
No abstract provided.
The Velocity Of Ultrasonics In Liquids, Mack A. Breazeale
The Velocity Of Ultrasonics In Liquids, Mack A. Breazeale
Masters Theses
"In acoustics the term ultrasonics is used to refer to those frequencies which are above the range of human hearing; that is, frequencies above approximately 20,000 cycles per second. Since the laws of sound which are valid for the audible range are also valid in the ultrasonic range and since the wave length of ultrasonics is much shorter than that of audible sound, ultrasonic has proved very valuable in the calculation of both the velocity and the absorption coefficient of sound in various media. This is especially notable in the case of liquids, where the velocity of sound is much …
Coloration Of Glass By High Energy Radiation, Thomas L. Nickens
Coloration Of Glass By High Energy Radiation, Thomas L. Nickens
Masters Theses
"Purpose of Investigation: One of the objects of this investigation is to determine the amount of CeO2 required to prevent the discoloration of glass when exposed to gamma radiation. By discoloration, it is meant that there has been a change in the absorption bands of visible light. Another objective is an attempt to prevent the coloration by the introduction of two oxides not previously used. Finally, a theory is presented which could explain why glass containing CeO2 does not change color upon irradiation by gamma rays"--Introduction, page 1.
Early History Of Millard County And Its Latter-Day Saint Settlers, 1851-1912, Ladd R. Cropper
Early History Of Millard County And Its Latter-Day Saint Settlers, 1851-1912, Ladd R. Cropper
Theses and Dissertations
Millard County, Utah is located one hundred and fifty miles south of Salt Lake City in the west central part of the state. The county is bounded on the north by Juab County, on the west by Nevada, on the south by Beaver County, and on the east by Sevie, Sanpete, and Juab Counties.
There are interesting formations of extinct volcanoes. Fossils can be found and well marked evidences of an ancient lake named Bonneville.
A short account of the early explorer, Father Escalante, is given in the thesis. This tells of his travels in Millard County in the year …
A Model For X-Ray Scattering From A Free-Volume Liquid, Charles A. Hewett
A Model For X-Ray Scattering From A Free-Volume Liquid, Charles A. Hewett
Masters Theses
"Investigation of the diffraction of x-rays by liquids was begun soon after the well-known work of Friedrich, Knipping, and Laue proved to be of value in supplying information as to the arrangement of atoms in crystalline matter. Friedrich in 1913 reported x-ray diffraction patterns of Canadian Balsam, paraffin, and amber; three years later Debye and Scherrer, in their work on benzene, (among other liquids investigated) showed that the diffraction phenomenon exhibited was one of interference. Still later, in 1922, Keesom and de Smedt reported similar investigations carried out on argon, nitrogen, and oxygen in the liquid state, the results of …
Voltammetry At Constant Current And Its Application To Electrochemical Kinetics., Calvin C. Mattax
Voltammetry At Constant Current And Its Application To Electrochemical Kinetics., Calvin C. Mattax
LSU Historical Dissertations and Theses
No abstract provided.