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Involvement Of Hemerythrin Sulfhydryl Groups In Heavy Atom Binding And Subunit Interactions, Suzanne Elizabeth Clarke

Dissertations and Theses

Hemerythrin is a respiratory protein found in the erythrocytes of certain marine invertebrates. Structures have been obtained by x-ray crystallography for hemerythrins from Phascolopsis gouldii (P. gouldii) and Themiste dyscritum (T. dyscritum). Since many proteins are inactivated upon binding heavy metals such as mercury, an investigation of mercury-protein interactions in this protein was undertaken. In order to understand the nature of heavy-metal protein interactions in T. dyscritum it was necessary to identify the metalloprotein ligands since neither the liganding amino acid residues nor the geometry of the mercury complexes could be identified in the crystallographic studies.

Monotone Methods For Nonlinear Boundary Value Problems In Banach Spaces, Stephen R. Bernfeld, V. Lakshmikantham

Mathematics Technical Papers - Archive

Monotone methods have been used to generate multiple solutions of nonlinear boundary value problems for both ordinary and partial differential equations. Keller [10] and Sattinger [13], extending the chord method, considered nonlinear partial differential equations containing no gradient term. The inclusion of the gradient term was first introduced by Chandra and Davis [6] who considered the ordinary boundary value problem (1.1) [see pdf for notation] (1.2) [see pdf for notation] Here [see pdf for notation]. They assumed that f depends linearly on [see pdf for notation]; and this restriction on [see pdf for notation]' was eliminated by Bernfeld and Chandra …

Remarks On Numerical Computations Using The Alternative Method, R. Kannan, Jerome Eisenfeld, Stephen R. Bernfeld

Mathematics Technical Papers - Archive

Recently Cesari and Bowman [1] have demonstrated the applicability of the alternative method to obtain approximate solutions of nonlinear equations. They provided numerical approximations of solutions of two point nonlinear boundary value problems. Our purpose here is to point out how these approximations may be improved upon without much additional effort. For illustrative purposes we discuss one of their examples.

Leaf Litter Processing In Aquatic Systems Two Variable Model, Boyd Jay Hanson

Theses and Dissertations

The adequacy of the negative exponential model with one independent variable, days or accumulated time, as a descriptive equation for aquatic leaf litter processing was examined. The effect of adding a second independent variable, degree days or accumulated temperature, to the model was also examined. The two variable negative exponential model was shown to have at least two advantages over the single variable model. The two variable model adequately fits litter processing data for more cases than the single variable model. The expanded model also allows determination of rate coefficients for various temperature levels of the experiment rather than assuming …

Intense Flowing Hollow Cathode Lamp, F. H.K. Rambow, Laird D. Schearer

Physics Faculty Research & Creative Works

An inexpensive, simple, and versatile hollow cathode lamp has been developed which produces intense ion resonance radiation of about 1 mW into 4π/25 sr. The lamp employs flowing helium gas to sustain the discharge. The construction permits a variety of cathode seed materials to be easily interchanged. The same lamp has been used as a source of ion resonance radiation for Ca, Ba, Zn, Mg, Sr, Yb, and Eu.

The Effects Of Various Pyrolysis Conditions On The Release Of Products From Green River Oil Shale, Georgia Thomas Fritz

Chemistry and Chemical Biology ETDs

The fusion of oil shales with eutectic mixtures of inorganic salts was studied with the objective of finding a chemical means of releasing the organic material either at a lower temperature or with a lower empirical activation energy (E_a). Experimental techniques by which the pyrolysis of oil shale was studied were thermogravimetry (TG), evolved gas detection (EGD), and pyrolysis/thin-layer chromatography (TLC). The following fused salts were investigated (ratios in mo1%): LiCO₃/Na₂co₃/K2CO3, 43.5/31.5/25.0; KSCN/NaSCN, 73.75/26.25; KSCN/­NaSCN, 70/30; Na₂SO₄/K₂SO₄/ZnSO₄, 29.1/30.2/40.7; NaCl/Na₂CO_{3 …}

Neutron-Proton Elastic Scattering At 790 Mev, Roger Daniel Carlini

Physics & Astronomy ETDs

The forward n-p differential cross-section is measured at 790 Mev from 9.5 to 60. degrees in the center of mass. The systematic errors are less than 4.0%. The differential cross-section is parameterized by the function dσ/dΩ = A e^bt, where t is the momentum transfer between the incoming and outgoing neutrons in (GeV/C)², and A and b are constants having the values A= 9.757±.069, b= 5.052±.045. With 36 data points the x² is 55. The magnitude of the ratio of the real to imaginary part of the forward scattering amplitude is found to be .3501±.14.

Texture, Fabric And Composition Of Fine-Grained Terrigenous Sediments From The Graneros Member Of The Mancos Shale, San Juan Basin, New Mexico, Anthony J. Skeryanc

Earth and Planetary Sciences ETDs

Petrography, scanning electron microscopy (SEM), porosity and permeability, radiography, x-ray diffraction (clay mineralogy), whole rock wet chemistry and organic analysis are used to examine the texture, fabric and composition of fine-grained terrigenous sediments from the Graneros Member of the Mancos Shale, San Juan Basin, New Mexico. Grain content is highly variable and determines the configuration of the fabric during compaction. A scale of the degree of parallel orientation is compared to grain content and reveals a decrease in parallelism with an increase in grain content. Grain content also affects permeability, thus controlling he degree of authigenic mineralization. Although clay composition …

The Chemistry Of Sf₅Br And Sf₅Cf=Cf₂ - Addition Reactions, Robin J. Debuhr

Dissertations and Theses

Addition reactions of pentafluorosulfur bromide (SF₅Br) with fluoroolefins were studied. Three new adducts were prepared, SF₅CHFCHC1Br, SF₅CH₂CH(CF₃)Br, SF₅CHFCFC1Br. SF₅Br and CFC1=CHC1 yielded a small amount of product but attempts to add SF₅Br to CF₂₌FCOF were unsuccessful.

The mechanism for these addition reactions seems to involve a free radical addition pathway. Steric factors seem to be important in determining whether SF₅Br will add to fluoroolefins.

The new compounds, SF₅CF(CF₃)COF and SF₅CF(CF₃ )CONH₂ have …

Fixed Point Theorem For Non-Expansive Mappings On Banach Spaces With Unifformly Normal Structure, B. B. Williams, A. A. Gillespie

Mathematics Technical Papers - Archive

In [1] Kirk proved that if D is a bounded, closed, and convex subset of a reflexive Banach space that has normal structure, then every non-expansive mapping of D into D has a fixed point. This was also proved for a uniformly convex space by Browder [2]. In this paper we replace uniformly convex, or reflexive and normal structure, by uniformly normal structure to obtain this result. Let S be a bounded subset of the Banach space X and [see pdf for notation] (1) [see pdf for notation] (2) [see pdf for notation] (3) [see pdf for notation] A space …

Convection In Pulsating Stars, Michael John Robert Costello

Physics & Astronomy ETDs

Stellar models using mixing length convection in a linear calculation show a red edge to the instability strip. The models are of a 6 solar mass, 1 x 10 ergs/sec luminos­ity, King 4A composition, cepheid variable star, for various values of effective temperature, Te, and mixing length parameter, a. Results are obtained with an assumed instantaneous adjustment of the convective flux to changes in the local stellar conditions. Calculations of the convective time de­lay show it to be small compared to the period, under the assumption that the convective time delay is due solely to the inertia of convective bubbles. …

Ferromagneticlike Resonance Behavior In Superfluid 3he-B, Richard A. Webb

Faculty Publications

Nonlinear cw NMR behavior, similar to that observed on ferromagnets at high rf powers, has been observed in superfluid ³He-B using a superconducting quantum interference device (SQUID) magnetometer in fields of 31, 102, 180, and 308 Oe and at a pressure of 21 bar. It is observed that beyond some threshold value of the transverse H₁ field the z component of magnetization anomalously decreases and is followed by a rapid increase back to the normal resonance curve as the frequency of the H₁ field is swept through resonance.

4th Annual Umr-Dnr Conference On Energy -- Entire Proceedings, University Of Missouri--Rolla

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

No abstract provided.

Pitman-Closeness Efficiency Of Estimators Of Reliability With Application To The Exponent/Al Failure Model, Jerome P. Keating, Danny D. Dyer

Mathematics Technical Papers - Archive

When there are available several point estimators of component or system reliability, it would be of interest to compare such estimators through some "closeness to the true value of reliability" criteria. Along these lines, the concept of Pitman-closeness efficiency is introduced. Essentially, when comparing two estimators of reliability for a given situation, Pitman-closeness efficiency gives the odds in favor of one of the estimators being closer to the true value of reliability than is the other. Theory is developed which provides a straightforward way to evaluate this measure of efficiency under fairly general conditions on the estimators. Based on this …

Water Current, Volume 9, No. 6, November/December 1977

Water Current Newsletter

From the Desk of the Assistant Director
Interdisciplinary Water Resources Seminar
Proceedings Available from NWRC
NWRC Reports Available
MRBC Adopts Water Resources Priorities
Nation Now Using More than 420 Billion Gallons of Water a Day
Save Water, Save Money
New Water Center Director at Texas Tech
Research Review: Mapping Model for Determining Land Suitable for Irrigation

The Water Monomer On The Basal Plane Of Ice Iₕ: An Effective Pair, Central Force Potential Model Of The Static Interaction, Jerry Kiefer, Barbara N. Hale

Physics Faculty Research & Creative Works

The H₂O-H₂O intermolecular central force potential of Lemberg and Stillinger is used to obtain optimal binding energy surfaces, vibrational frequencies, and bonding configurations of an adsorbed water monomer on a model basal plane of ice I_h. The monomer interacts (pairwise) with 50 molecules arranged in two layers of the unrelaxed bulk ice lattice. The results of calculations for three model surface sites of differing proton arrangement indicate the existence of diffusion barriers of the order of 2.5 kcal/mole and optimal monomer bonding sites at about 9 kcal/mole with nonepitaxial characteristics. Perspective computer-drawn plots of …

The Effect Of Warmed Humidified Oxygen On The Temperature Of Depressed Newborns, Earlene Scharping

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to evaluate the effect of warmed humidified oxygen on the body temperature of depressed newborns and compare it to the effect of unwarned un-humidified oxygen administered under similar circumstances. The sample group consisted of a total of ten infants (five control and five experimental) with birth weights > 2000 gms who had an Apgar score of less than seven at birth and who required the administration of oxygen. The control group received oxygen in the routine delivery room manner (unwarned and un-humidified). The experimental group received oxygen which had been warmed to a temperature of …

Mineralogy, Petrology, And Geochemistry Of Some Lavas From Kohala Volcano, Hawaii, Steven Sherman Sibray

Earth and Planetary Sciences ETDs

Twelve samples from Kohala volcano, Hawaii were selected for chemical analyses and electron microprobe study. Seven of the samples are from the Pololu volcanic series. Three of these samples are tholeiitic basalts, two are oceanites, and two are alkali olivine basalts transitional to hawaiite. The five samples from the Hawi volcanic series include one hawaiite, two mugearites, and two benmoreites. Electron microprobe study of the minerals in the basaltic matrix of the two oceanites reveal that one of the oceanites was derived from a tholeiitic magma while the other was derived from an alkalic magma. The alkalic oceanite matrix is …

Mineralogy, Petrology, And Geochemistry Of Some Lavas From Kohala Volcano, Hawaii, Steven Sherman Sibray

Earth and Planetary Sciences ETDs

Twelve samples from Kohala volcano, Hawaii, were selected for chemical analyses and electron microprobe study. Seven of the samples are from the Polulu volcanic series. Three of the samples are tholeiitic basalts, two are oceanites, and two are alkali olivine basalts transitional to hawaiite. The five samples from the Hawi volcanic series include one hawaiite, two mugearites, and two benmoreites. Electron microprobe study of the minerals in the basaltic matrix of the two oceanites reveal that one of the oceanites was derived from a tholeiitic magma while the other was derived from an alkalic magma. The alkalic oceanite matrix is …

Final Report: Lake Mead Monitoring Program, James E. Deacon

Publications (WR)

The Lake Mead Monitoring Program has continued to develop information on the limnological condition of Lake Mead. We have significantly increased our analytical capabilities this year by developing a cooperative project with the U.S. Bureau of Reclamation and continuing our cooperative program with E.P.A. We also were able to derive significant benefit from the reviews of the Pollution Abatement Project written by Clair Sawyer and Charles Goldman. Partially as a result of these reviews we have had the opportunity to interpret and more fully explain the significance of our work to a wider public audience than would otherwise have been …

Water Current, Volume 9, No. 5, September/October 1977

Water Current Newsletter

From the Desk of the Director
Conference on Decisioni Making in Water Resources
Exchange Program Completed
Neuberger Appointed to Water Post
Short Course in Hydrology
Gary Cobb Named Director of OWRT
New Director for Water Resources Council
Interior Proposes New Rules for Disposal of "Excess" Irrigated Lands
USGS Director McKelvey to Leave Post January 1
Research Review: Mechanics and Potentials of Artificial Groundwater Recharge

Megafossil Orientation Of Selected Silurian, Devonian, And Pleistocene Reefs Of North America, Lance T. Hodges

Loma Linda University Electronic Theses, Dissertations & Projects

The definition and identification of fossil reefs has been a continually vexing problem for paleoecologists. One approach to this problem is a study of fossil orientation in "reef" strata. Orientation of corals in exposures of reef limestones has been mentioned in the literature, but usually in a brief, non-quantitative way. Eight study sites were used to investigate the nature of structures described as reef-related. Two sites were selected from the Pleistocene Key Largo Limestone of Florida, probably a backreef facies. The Florida sites were used as fossil reef reference sites, because of their close relationship to modern Florida reefs. The …

Biostratigraphy Of The Type Weberg Member, Snowshoe Formation, Grant County, Oregon, David G. Taylor

Dissertations and Theses

Thirty three species of ammonites are recorded from the composite type section of the Weberg Member of the Snowshoe Formation in the Suplee area, Grant County, Oregon. Holcophylloceras burkei, Euhoploceras westi, E. tubereulosum and Strigoceras taylori are described as new, while four new species belonging to the genera Sonninia [?], Bradfordia, Pseudotoites and Witchellia are not formally named. Three ammonite zonules characterize the ammonite sequence of the type Weberg composite section. The sequence correlates with parts of the standard lower and middle Bajocian (Jurassic) of northwestern Europe. In addition, four associations (paleo-communities) of benthic mega invertebrates, the Gervillia, Protocardia, Isocyprina …

The Use Of Nuclear Reactions And Sims For Quantitative Depth Profiling Of Hydrogen In Amorphous Silicon, David D. Allred, G. J. Clark, C. W. White, B. R. Appleton, C. W. Magee, D. E. Carlson

Faculty Publications

Depth profiles for hydrogen in amorphous silicon have been determined by the use of resonant nuclear reactions [1H(15N,αγ)12C and 1H(19F,αγ)16O] and by secondary ion mass spectroscopy (SIMS). Independent calibration procedures were used for the two techniques. Measurements were made on the same amorphous silicon film to provide a direct comparison of the two hydrogen analysis techniques. The hydrogen concentration in the bulk of the film was determined to be about 9 at % H. The SIMS results agree with the resonant nuclear reaction results to within 10%, which demonstrates that quantitative hydrogen depth profiles can be obtained by SIMS analysis …

Beef Cattle Feedlot Runoff And Control In Eastern Nebraska, L. P. Schram, Lynn R. Shuyler

United States Environmental Protection Agency: Publications

This study was initiated to determine operational characteristics of runoff control facility components for beef cattle feedlots.

A runoff control facility was designed and constructed for a 3,000 head capacity feedlot in eastern Nebraska. Components of the runoff control facility included debris basins inside the pen and outside the pen, a holding pond, and a disposal system.

Results indicated that design volumes for the debris basins and holding ponds were effective in controlling runoff from the lots caused by snowmelt and rainfall for climatic conditions within eastern Nebraska. Characteristics of runoff transported solids from this large lot compared favorably with …

Comparison Of Point Estimators Of Normal Percentiles, Danny D. Dyer, Onas L. Hensley, Jerome P. Keating

Mathematics Technical Papers - Archive

There are available several point estimators of the percentiles of a normal distribution with both mean and variance unknown. Consequently, it would seam appropriate to make a comparison among the estimators through sums "closeness to the true value" criteria. Along these lines, the concept of Pitman-closeness efficiency is introduced. Essentially, when comparing two estimators, the Pitman-closeness efficiency gives "odds" in favor of one of the estimators being closer to the true value than is the other in a given situation. Through the use of Pitman-closeness efficiency, this paper compares (a) the maximum likelihood estimator, (b) the minimum variance unbissed estimator, …

High Pressure Liquid Chromatographic Methods For The Separations Of Derivatized Alpha-Keto Acids And Thiamine Phosphate Esters, Bruce Clark Hemming

Theses and Dissertations

Improved methods have been developed for separation of a-keto acid derivatives and for thiamine and its phosphate esters. Linear gradient reverse phase chromatography using ion-pair formation provides baseline resolution for a seven-component homologous series of a-keto acid dinitrophenylhydrazones having increasing carbon chain lengths. Branched-chain keto acids can also be separated. Aldehyde derivatives were examined as possible interfering compounds. Peak identification in biological material was confirmed for pyruvate by an enzymic peak shift technique. Monitoring near 365 nm permits low nanogram detection. Preliminary studies of keto acids in biological material illustrate the method's applicability. The same system with slight changes separates …

A Software Science Analysis Of The Writing Of A Technical Paper, M. H. Halstead

Department of Computer Science Technical Reports

No abstract provided.

High Spin-Low Spin Crossover And Antiferromagnetic Interactions In Tris(1-Pyrrolidinecarbodithioato)Iron(Iii) And The 4-Morpholine (Fem) And Dibutyl Analogs, Effect Of Recrystallization Solvent, And Crystal Structure Of Fem·Nitrobenzene, Edward J. Cukauskas, Bascom Sine Deaver, Ekkehard Sinn

Chemistry Faculty Research & Creative Works

High sensitivity magnetic susceptibility determinations, especially in the range 1.2-4.2 K on pure and dilute tris(pyrrolidinecarbodithioato)iron(III) (FeP) in its high spin form, show that a maximum at about 2 K is caused by antiferromagnetic interactions. The analogous chromium(III) complex does not exhibit significant antiferromagnetism compared to that of the iron complex, and it is likely that the upper e electrons possessed by the iron and not by the chromium are responsible for the bulk of the antiferromagnetism. As the iron atoms are about 9 Å apart in discrete molecules, the antiferromagnetic interactions presumably occur between unpaired spins delocalized on to …

A Photochemical Study Of S-Triazolo[4,3-B] Pyridazine And 3-Diazo-4-Oxo-3,4-Dihydroquinoline, John Timothy Carlock

Theses and Dissertations

When subjected to ultraviolet radiation in the presence of an alkene, s-triazolo[4,3-b]pyridazine (STP) undergoes an unusual 3 + 2 photocycloaddition wherein the alkene adds to the 1 and 8 positions of STP with concommitant N4-N5 bond cleavage yielding 5,6-disubstituted-6,7-dihydro-7-methylene (and 7-cyanomethyl)-5H-pyrrolo[1,2-b]-s-triazoles. Amides and esters of indole-3-carboxylic acid have been synthesized by a novel reaction employing the ultraviolet irradiation of 3-diazo-4-oxo-3,4-dihydroquinoline (QDA) in the presence of amines or alcohols respectively. QDA, when irradiated, is postulated to undergo an internal Wolff Rearrangement to Indole-3-ketene which can add any amine or alcohol to form the corresponding amide or ester in modest to good …