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Geology, Geochemistry And Lava Tubes In Quaternary Basalts, Northeastern Part Of Zuni Lava Field, Valencia County, New Mexico, James Douglas Causey
Geology, Geochemistry And Lava Tubes In Quaternary Basalts, Northeastern Part Of Zuni Lava Field, Valencia County, New Mexico, James Douglas Causey
Earth and Planetary Sciences ETDs
Basaltic volcanism in the northeastern part of the Zuni lava field is related to a north-northeast trending regional fracture system. This is shown by elongation of centers and their alignment. However, .the fractures do not control the direction of lava tubes.
There are three distinct stages of volcanic activity common to the Zuni lava field:
1) early pyroclastic eruptions,
2) quiescent flows or fissure eruptions
3) late pyroclastic eruptions.
Evidence for the first stage is sometimes lacking, but the second and third stages can always be seen.
The basalts range from weakly tholeiitic to alkali in nature. Potassium content varies …
I. Existence Of Eigenvalues For Integral Equations; Ii. A Collocation Method For Boundary Value Problems, Robert Dodd Russell
I. Existence Of Eigenvalues For Integral Equations; Ii. A Collocation Method For Boundary Value Problems, Robert Dodd Russell
Mathematics & Statistics ETDs
I. The existence of eigenvalues is shown for certain classes of integral equations with continuous kernels. A number of interesting and useful results are thereby treated in a unified and relatively elementary way. The simplicity of these new proofs make the results accessible to introductory courses on the theory of integral equations.
II. Collocation with piecewise polynomial functions is developed as a method for solving two-point bour:rlary value problems. Convergence is shown for a general class of linear problems and a rather broad class of nonlinear problems. Some computational examples are presented to illustrate the wide applicability and efficiency of …
Liquid Scintillators. The Photooxidation Of 2,5-Diphenyloxazole, Margaret E. Ackerman
Liquid Scintillators. The Photooxidation Of 2,5-Diphenyloxazole, Margaret E. Ackerman
Chemistry and Chemical Biology ETDs
Mackay had found that prolonged ultraviolet irradiation of solutions of 2,5-diphenyloxazole (PPO) (1) in toluene resulted in the formation of an insoluble crystalline product 2 which accumulated above the meniscus; the formation of 2 was dependent upon the presence of dissolved oxygen and water in the solutions. The Compound 2 was not a simple degradation product of PPO (1); elemental analysis was compatible with the empirical formula C22H17O5N and the thermal decomposition of 2 gave equal molar amounts of carbon monoxide, benzoic acid, and dibenzamide. The study described in this dissertation was initiated to establish the structure of 2 and …
Goursat Problems For The Abstract Equation Urs = Lu, Walter J. Roth
Goursat Problems For The Abstract Equation Urs = Lu, Walter J. Roth
Mathematics & Statistics ETDs
Effect Of The Pedernal Axis On Permian And Triassic Sedimentation, Philip F. Hock
Effect Of The Pedernal Axis On Permian And Triassic Sedimentation, Philip F. Hock
Earth and Planetary Sciences ETDs
The area surrounding the Pedernal Hills has been of scientific and economic interest for a number of years. The effect of the Pedernal axis on sedimentation and stratigraphy of late Paleozoic rocks is of major importance. The principal purposes of this study were to determine whether the Precambrian terrane was an active source of sediment and what effect it had on thickness of strata during Permian and Triassic time. the area was also mapped in as much detail as the scale (1:125,000) permitted.
A Spectroscopic Investigation Of Electron Transfer Transitions In Osmium (Ii) Complexes., Brian J. Pankuch
A Spectroscopic Investigation Of Electron Transfer Transitions In Osmium (Ii) Complexes., Brian J. Pankuch
Chemistry and Chemical Biology ETDs
Osmium (II) complexes containing organic coordinating ligands 2.2'-bipyridine, 1.10-phenanthroline, 2.2' .2"terpyridine were studied spectroscopically. Syntheses were carried out by published methods, and each complex was checked by chemical analysis and thin layer chromatography. The complexes were shown to be d6 strong field systems by magnetic susceptibility measurements performed at room temperature in air.
Room temperature absorption spectra in the visible and near-ultraviolet were measured in solvents of different polarities (H2O, MeOH, CH3CN, DMF, CHCl3) and solvent shifts of the band maxima of 0.3 to 3 kK were found. Low temperature (approximately 82-90°K) absorption spectra …
Surface Energies In The Caso4-H2o System And The Effect Of Supersaturation On The Crystallization Of Gypsum, Sandra C. Feldman
Surface Energies In The Caso4-H2o System And The Effect Of Supersaturation On The Crystallization Of Gypsum, Sandra C. Feldman
Earth and Planetary Sciences ETDs
The surface energy of gypsum has been experimentally determined to be 70. 2 erg/cm2 at 30˚ C. The value for anhydrite is calculated as 112 erg/cm2. At various extrapolated supersaturations, the number of particles or ions necessary to form nuclei of gypsum and anhydrite is:
Supersaturation
No. part. or ions/nucleus
Gypsum
Anhydrite
10
60.5
1000
51
8
2
99
20
4
Crystal size measurements and crystal shapes were noted for gypsum within the range of supersaturations studied (45.6 to 131). The maximum crystal size is attained at a slightly lower supersaturation than the critical supersaturation. The shape …
Propagation Of Ultrasound In Plastic Crystals, Carl E. Scheie
Propagation Of Ultrasound In Plastic Crystals, Carl E. Scheie
Physics & Astronomy ETDs
The study of the organic solid state, and in particular of plastic crystals, is a relatively new branch of physics (1,2). Timmermans first surmised the existence of these solids from the anomalous values of the entropies of fusion. The solids possess many of the characteristics of liquids. They are easily deformed by pressure and they show dielectric properties that can be described on the basis of rotation of the molecules in their lattice positions. Still they have a definite crystal structure. Thus, even though the molecules are not symmetric, they appear to be to some degree because of the rotation. …
Trace-Element Geochemistry Of Southwestern Turquoise, Anne Marguerite Colberg Sigleo
Trace-Element Geochemistry Of Southwestern Turquoise, Anne Marguerite Colberg Sigleo
Earth and Planetary Sciences ETDs
Southwestern turquoise (CuAl6(PO4)4 OH8 · 4H2O) is associated with Laramide intrusions along the eastern and southern margins of the Colorado Plateau in Colorado, New Mexico, and Arizona, and with a zone of Late DevonianMississippian tectonic activity in Nevada. A review, of the previous work on the origin of turquoise is presented. Of these, the supergene hypothesis proposed by Sidney Paige in 1912 generally remains undisputed in the literature. Much of the data presented in this study, however, suggest a hydrothermal mode of formation. The concentrations of Co in particular are most similar …
Volcanic Rocks Associated With The Western Part Of The Mogollon Plateau Volcano-Tectonic Complex, Southwestern New Mexico, Rodney Charles Rhodes
Volcanic Rocks Associated With The Western Part Of The Mogollon Plateau Volcano-Tectonic Complex, Southwestern New Mexico, Rodney Charles Rhodes
Earth and Planetary Sciences ETDs
An area of approximately 450 square miles was mapped on a reconnaissance basis, covering part of the western half of the Mogollon Plateau volcano-tectonic complex. This report deals with the geology of the area and its relationship to the regional volcano-tectonic structure of the Mogollon Plateau.
The Synthesis Of Some New Azabenzo[A]Pyrene And Monomethyl Azabenzo[A]Pyrene Derivatives, Richard E. Phillips
The Synthesis Of Some New Azabenzo[A]Pyrene And Monomethyl Azabenzo[A]Pyrene Derivatives, Richard E. Phillips
Chemistry and Chemical Biology ETDs
The synthesis of six new azabenzo[a]pyrenes was undertaken in order that the carcinogenic and carcinostatic properties of these compounds might be tested. The compounds thus synthesized were 4-aza benzo[a]pyrene (1), 5-methyl-4-azabenzo[a]pyrene (2), 12-azabenzo[a]pyrene (3), 11-methyl-12-azabenzo [a]pyrene (4),5 -azabenzo [a]pyrene (5), and 4-methy1-5-azabenzo[a]pyrene (6).
Compounds 1 and 2 were prepared from the intermediate 4-keto-1,2,3,4-tctrahydrochrysene. The azine from this ketone was dehydrogenated and the resulting aromatic amine was both formylated and acetylated. The amides were cyclized with polyphosphoric acid in a Bischler-Napieralski cyclodchydration giving fair yields of 1 and 2. The synthesis of compounds 3 and 4 was carried out in a …