Physical Sciences and Mathematics Commons^™

Plant Collections For Saltland Revegetation And Soil Conservation, A J. Clarke, T C. Swaan, C V. Malcolm

Technical Bulletins

In 1967, during an overseas plant exploration trip, seeds of plants of reputed salt tolerance and forage value were obtained from seven countries. Since 1971, over 600 plants have been added to the original collection of 343 plants already under observation for suitability for forage production in saline and arid areas. Additions to the test programme since 1971, include shrubs from Algeria; Argentina; Australia; Chile; England; Iran; Israel; Libya; Morocco; Netherlands; Russia; South Africa; Spain; Tunis and the United States of America. This Bulletin includes details of all plant collections from 1966 to December 1983.

Summary Of Rhizobium Experiments, J G. Howieson

Experimental Summaries - Plant Research

The main emphasis for rhizobial work in 1984 was on the acid tolerance of medic Rhizobium. The experimental programme in the field was greatly expanded to include testing of some 160 isolates collected from Sardinia in May 1984. Broadacre sowings of acid tolerant strain WSM 419 were undertaken as a preliminary step to its commercial release in 1985. Glasshouse work in 1984 was dedicated to a more intensive investigation of the factors contributing to the enhanced nodulating ability of M. polymorpha and M. murex on acid soils. As well, a simple technique for identifying acid tolerant strains of rhizobia in …

Long Term Minimum Tillage Investigations, Stubble Management, Deep Ripping, R J. Jarvis, L G. Butcher

Experimental Summaries - Plant Research

Direct drilling Long term minimum tillage investigations (1) Continuous cropping – 77A16, 77A18, 77MT15, 77WH17, 77WH13, 78M25. (2) Rotational cropping – 77A43, 77E52, 77M35, 77M56, 77MT51, 77WH8. Stubble management – 79M7, 79WH6, 82M34, 84M1, 82LG4, 82LG46 (82KD1). Deep ripping - 82M35 in Minimum Tillage Rotation section also contains a deep ripping treatment. 77WH17, 80A44, 80NO46, 81M45, 81NO3, 81NO4, 82GE37, 82GE38, 82M30, 82M46, 82M60, 82ME38, 82N32, 82WH49, 84E24, (84C42, 84C43, 84C44, 84C45, 84C46) Eradu Sandplain – ECRS, 84E23, 84E24, 84JE43, 84JE44, 84LG37, 84M38, 84NO58, 84WH2, 84WH3, 84WH39. Additional deep ripping research is included in summaries by W. Bowden, D. Tennant, J. …

Take-All Of Cereals. Rhizoctonia Patch Of Cereals, G C. Macnish

Experimental Summaries - Plant Research

Part 1. A. Take all of cereals: Effect of nitrogen sources on take-all. 76LG25 (N = 50kg/ha) 82NE34. 77E4 (N = 25kg/ha). 77MT19 (N = 45 kg/ha). B. RHIZOCTONIA PATCH OF CEREALS: Rhizoctonia patch on lupins - 82E17. Abbreviations used: D - Drilled with seed G.S. - Growth stage based on H. Fisher scale NA - Not available N – Nitrogen P - Phosphorus TA - Take-all TD - Topdressed D.D. - Direct drilled T.D.D. - Triple disc drill As - Ammonium sulphate An - Ammonium nitrate (Agran 34) Sn - Sodium nitrate Ag1 - Agras No. 1 Ag2 - …

Soil Acidity - High Rainfall Pastures. Lime On Old Land Pastures - Field & Glasshouse Experiments, J S. Yeates, M. F. Clarke, C S. Fang, D A. Tooke

Experimental Summaries - Plant Research

Soil Acidity - High Rainfall Pastures (funded by the Australian Meat Research Committee). Lime on old land pastures. 1. Field experiments - 80BU13, 80BU14, 81AL10, 81AL12, 81AL16, 81BU18, 81BY18, 81BY19, 81BY25, 81BY26, 82AL4, 82AL5, 82AL55, 82BU7, 82BU8, 82HA35, 82HA36, 82PE1, 83AL7, 83AL9, 83AL10, 83AL11, 83AL13, 83AL14, 83BU25, 83BU26, 83BY29, 83HA19, 83HA41, 84BU9, 84BY36, 84BY37, 84HA21. 2. Glasshouse experiments - 84GL4. Investigation of factors involved in lime responses on a new land acid peaty sand. 84GL7, 84GL8. Investigation of factors involved in lime responses on old land high rainfall area pastures.

A Lamellar Liquid Crystal As An In Situ Surface Balance. I. The Conformation Of 5- (And 6-)Carboxy-4-Hexyl-2-Cyclohexene-1-Yl Octanoic Acid And Its Monosoap, Tony Flaim, Stig Friberg

Chemistry Faculty Research & Creative Works

The interfacial conformation of a dicarboxylic acid, 5- (and 6-)carboxy-4-hexyl-2-cyclohexene-1-yl octanoic acid, and its monosodium soap was determined from the change of liquid crystal dimensions after introduction of the diacid compounds. The results showed that both functional groups of the Mono soap form were present at the interface and that increased water content of the liquid crystal matrix had little effect on the conformation of the Mono soap. On the other hand, the results indicated the conformation of the diacid as such to depend on the water content of the matrix. At low water content, the diacid form was in …

Order Parameters Of Hydrocarbons Solubilized In A Lamellar Liquid Crystal, Anthony J.I. Ward, Stig Friberg, David W. Larsen, Shankar B. Rananavare

Chemistry Faculty Research & Creative Works

A preliminary study of the 2H NMR spectrum of n-hexadecane-d34 solubilized in the lamellar phase of tetra ethylene glycol n-dodecyl ether has been made as a function of solubilization content. Complex spectra comprising eight overlapping powder spectra were observed, which showed a complex oil concentration dependence. These spectra were unusually rich in detail and indicate a considerably higher degree of complexity than has earlier been reported for solubilized hydrocarbons. The derived order profile was found to be different from that normally found for amphiphiles in lamellar environments. A tentative model involving some penetration of solubilize molecules between the host amphiphiles …

Single Compound Forming A Lyotropic Liquid Crystal At Room Temperature, Stig Friberg, Paul Liang, Frances E. Lockwood, Maher Tadros

Chemistry Faculty Research & Creative Works

The compound triethanolammonium oleate forms a lamellar liquid crystal at room temperature. The basis for the lyotropic mesomorphism is the fact that part of the triethanolammonium oleate has changed to triethanolamine and oleic acid. These two compounds serve as solvents in the liquid crystalline structure. © 1984 American Chemical Society.

Aphasia After Left Thalamic Infarction, Philip B. Gorelick, Daniel B. Hier, Louis Benevento, Susan Levitt, Walter Tan

Chemistry Faculty Research & Creative Works

We Examined a 70-Year-Old Woman Who Became Aphasic after a Left Thalamic Infarction. Computed Tomographic Scan Showed Injury that Was Largely Limited to the Ventral Anterior and Rostral Ventral Lateral Thalamic Nuclei. Speech Was Characterized by Reduced Voice Volume, Impaired Auditory and Reading Comprehension, Perseverations, Intermittent Use of Jargon, Fluctuations in the Ability to Perform Confrontation Naming, Extraneous Intrusions, Verbal Paraphasia, Intact Repetition Skills, and Fluent Speech that Was Laconic But Grammatically Correct. We Propose that the Deficits after Left Thalamic Injury Can Be Grouped into the Following Four Large Clusters: Extrapyramidal Deficits (Decreased or Fading Voice Volume), Deficits in …

Molecular Motion And Phases In An Equimolar Phosphatidylcholine/Ethylene Glycol System, David W. Larsen, Shankar B. Rananavare, Frank E. Stary, Magda Elnokaly, Stig Friberg

Chemistry Faculty Research & Creative Works

An equimolar mixture of phosphatidylcholine and ethylene glycol was studied by pulsed proton NMR at temperatures between 100 and 430 K. Relaxation times T1, T1ρ, and T1D, and second moments, M2, were measured. The system is lamellar liquid crystalline at room temperature, but at least four phases are present within the temperature range studied. Phase transitions were confirmed by DSC. Activation barriers were estimated for methyl reorientation, choline group motion, and chain motion. Models to describe the various motions and the role of spin diffusion are discussed. The relationship of the parameters for the present system to those for the …

Lyotropic Liquid Crystals From Lecithin, Water, And Polyethylene Glycol, Magda El Nokaly, Stig Friberg, David W. Larsen

Chemistry Faculty Research & Creative Works

Lyotropic liquid crystals with lecithin as the amphiphile and with water/polyethylene glycol (PEG) solutions as the solvent were prepared with polyethylene glycol/water ratios from 182 to 0. The liquid crystals were lamellar and the interlayer spacing was independent of the solvent content for water/PEG ratios ≤1 but increased strongly with the water/PEG ratio. Higher ratios gave increased interlayer spacing with solvent content similar to the variation for liquid crystals with water as solvent but the absolute values of the spacing were higher. © 1984 Academic Press, Inc. All rights reserved.

Composition Of Regenerated Cell Walls Of Reverting Aureobasidium Pullulans Protoplasts, D. R. Quigley, Donald J. Siehr

Chemistry Faculty Research & Creative Works

Protoplasts of Aureobasidium pullulans, formed by treating normal blastospores with polysaccharide-hydrolizing enzymes, synthesized glycans when incubated in shallow culture. The polysaccharides formed a loose, thick coating on the cells. The glycans that were formed are similar to the glycans in normal cell walls; however, they lack the branching that is normally found. This result is consistent with the findings of others who have studied the cell wall composition of reverting yeast protoplasts.

Magnetic And Crystallographic Structure Of Y₆Mn₂₃D₂₃, K. A. Hardman-Rhyne, James J. Rhyne, E. Prince, Cyrus E. Crowder, William Joseph James

Chemistry Faculty Research & Creative Works

The magnetic behavior of Y6Mn23 is dramatically altered upon hydrogenation (or deuteration). In this study it has been found, by means of high-resolution powder diffraction and Rietveld refinement techniques, that the crystallographic structure is distorted from face-centered cubic (Fm3m) at 295 K to a primitive tetragonal structure at 4 K in which deuterium atoms are atomically ordered. Y6Mn23 is a ferromagnetic compound with Tc=486 K, and bulk magnetization of 13.2 Bf.u. (formula unit). After deuteration of Y6Mn23 to the composition Y6Mn23D23, low-temperature scattering data (T<180 K) show that the b and f2 sites in the Fm3m structure are antiferromagnetic and the d and f1 sites have no spontaneous magnetic moment. © 1984 The American Physical Society.

Thermodynamics Of Aqueous Solutions Of 1-Naphthyl Methylcarbamate, Miguel Angel Huerta Diaz

University of the Pacific Theses and Dissertations

Accurate solubility measurements for the pesticide l-naphthyl-N-methylcarbamate (carbaryl) in water, natural and artificial seawater, NaCl, Na₂SO₄, CaCl₂ and (CH₃)₄NBr, at different temperatures covering the range 5-45 °C, were obtained using a combination of the generator column method and absorption spectroscopy techniques. As a rule, it was found that the solubility of carbaryl in water and in the electrolyte solution increased with an increase in temperature.

The thermodynamic parameter ΔG°, ΔH°, ΔS°, and ΔC°_p at 298.15 K, for the dissolution process carbaryl(s) to carbaryl(aq) and carbaryl(s) to carbaryl(aq. elect.), were calculated …

The Synthesis Of Various Substituted 3-Amino-7-Hydroxy-2,2-Dimethyltetralins And Their Opioid-Related Activities, David Alan Lippman

University of the Pacific Theses and Dissertations

A series of aminotetralones and aminotetralins were synthesized from the common intermediate F, 3-amino-2,2-dimethyl-7-methoxy- 1-tetralone. The final compounds derived from F were simple substituted and/or reduced analogues. The products would allow a progressive structure activity relationship to be drawn based on pharmacological testing.

The common intermediate F was synthesized utilizing a six step procedure starting with p-methoxyphenylacetic acid. The overall yield from the precursor to the F:HC1 was 25%. Compound F was either O-demethylated to form 3-amino-2,2-dimethyl-7-hydroxy-l-tetralone (I) or was dimethylated on the amine and subsequently O-demethylated to yield the 3-dimethylamino-7-hydroxy-2,2-dimethyl-l-tetralone (J). The last major modification was the reduction of …

Setchenov Parameters For Naphthalene, Gerardo Gold Bouchot

University of the Pacific Theses and Dissertations

It is the purpose of this work to study the solubility of naphthalene, the simplest polycyclic aromatic hydrocarbon as a function of the salt content and the temperature, in ranges that span those likely to be found in natural ecosystems. Another goal is to set up a high-pressure generator, to study the effect of pressure on the solubility of hydrocarbons.

Effects Of N-Substituents On The Polymerization Properties Of Maleimide, Dilip R. Abayasekara

Theses and Dissertations

The effect of the amide function and the carbethoxy function on the polymerization properties of maleimide are reported. The effects of these functions on homopolymerization and copolymerization (with styrene) were examined. These electron-withdrawing groups appeared to decrease the rate of homopolymerization and increase the rate of copolymerization.

N-carbamylmaleimide and N-carbethoxymaleimide were copolymerized with styrene in 1,4 -dioxane at 60.0° C at different feed ratios to high conversion. Copolymer composition, determined by elemental analysis and 1H NMR, indicated that while 1:1 copolymers were obtained with an equimolar feed ratio, the two systems were not alternating. It is of note that the …

Theoretical Study Of H2o–Hf And H2o–Hcl: Comparison With Experiment, M. M. Szczesniak, Steve Scheiner, Y. Bouteiller

Chemistry and Biochemistry Faculty Publications

The H bonds in H₂O–HF and H₂O–HCl are studied and compared using ab initio molecular orbital methods and the results compared to experimental data. Basis sets used are: (i) triple valence 6‐311G∗∗ and (ii) double ζ with two sets of polarization functions. Electron correlation, included via second‐ and third‐order Møller–Plesset perturbation theory, is found to have profound effects on both systems, particularly H₂O–HCl. Both H bonds are strengthened substantially with a concomitant reduction in length. H‐bond energies and geometries calculated at correlated levels are in excellent accord with …

Ab Initio Study Of Fh–Ph3 And Clh–Ph3 Including The Effects Of Electron Correlation, Z. Latajka, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Ab initio calculations are carried out for FH–PH₃ and ClH–PH₃ using a basis set including two sets of polarization functions. Electron correlation is incorporated via Møller–Plesset perturbation theory to second and (in part) to third orders. The basis set is tested and found to produce satisfactory treatments of subsystem properties including geometries and dipole moments as well as the proton affinity and inversion barrier of PH₃. Electron correlation is observed to markedly enhance the interaction between PH₃ and the hydrogen halides. Its contribution to the complexation energy is 30% …

Effects Of Basis Set And Electron Correlation On The Calculated Properties Of The Ammonia Dimer, Z. Latajka, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Ab initio calculations are carried out for (NH₃)₂ with a 6‐31G∗∗(1p,2d) basis set containing diffuse polarization functions. Electron correlation is included via second‐order Møller–Plesset perturbation theory (MP2). At the SCF level, the equilibrium R(NN) distance is 3.54 Å and the interaction energy is −2.35 kcal/mol. Inclusion of correlation enhances the attraction substantially, increasing the energy to −4.05 kcal/mol and reducing the intermolecular separation by 0.20 Å. Comparison with previous results at the SCF level demonstrates a variety of errors including exaggerated dipole moments, underestimation of polarization …

Resonant Electron Transfer And Excitation In Two-, Three-, And Four- Electron Caq +20 And Vq +23 Ions Colliding With Helium, J. A. Tanis, E. M. Bernstein, W. G. Graham, M. P. Stockli, M. Clark, Robert H. Mcfarland, T. J. Morgan, K. H. Berkner, A. S. Schlachter, J. W. Stearns

Physics Faculty Research & Creative Works

Significant new evidence is reported for resonant transfer and excitation in ion-atom collisions. This process, which is analogous to dielectronic recombination, occurs when a target electron is captured simultaneously with the excitation of the projectile followed by photon emission. Strong resonant behavior with structure, in agreement with theoretical calculations, is observed in the cross section for projectile K x rays coincident with single electron capture for 100-360-MeV Ca16+,17+,18+20 and 180-460-MeV V19+,20+,21+23 ions colliding with helium. © 1984 The American Physical Society.

Molecular-State Cross-Section Calculations For H+Csh-+Cs+, Ronald E. Olson, M. Kimura, H. Sato

Physics Faculty Research & Creative Works

Pseudopotential molecular-structure calculations have been used to obtain the seven lowest 1 and 1 states of CsH. These states and their associated radial and rotational coupling terms have been used to calculate the cross sections for H-+Cs+ ion-pair production in H+Cs(6s) and H+Cs*(6p) collisions at energies from 0.1 to 10 keV. The ion-ion mutual neutralization cross section, H-+Cs+ H+Cs, is also presented. The cross-section calculations were done with the perturbed-stationary-state method, modified to include two-electron translation factors. The ion-pair production cross section for ground-state reactants is in good agreement with experiment; collisions of H with excited Cs*(6p) show an order-of-magnitude …

The Homogeneous Nucleation Of Nonane, G. W. Adams, John L. Schmitt, R. A. Zalabsky

Physics Faculty Research & Creative Works

The homogeneous nucleation rate of n-nonane has been measured as a function of temperature and supersaturation ratio in a precision fast-expansion chamber. The measured nucleation rate ranges from 102 to 105 drops/cm3 over the temperature range 215-270 K. The results have been compared to the classical theory and to the classical theory with the RKC replacement factor. The RKC theory functional form is the basis for an empirical rate equation to fit the data. A full listing of the thermodynamic constants used for the reduction of the data is given. © 1984 American Institute of Physics.

Representations Of Algebras Over A Complete Discrete Valuation Ring, Brendan Goldsmith, Manfred Dugas, Rudiger Gobel

Articles

No abstract available

Non-Tidal Sea Level Variations Across The Lower Chesapeake Bay, Richard Leo Garfield

Dissertations, Theses, and Masters Projects

No abstract provided.

Studies On The Biochemical And Antibiotic Patterns Of The Genus Citrobacter, Craig Richard Tanner

University of the Pacific Theses and Dissertations

Today three species are recognized in the genus: C. freundii, C. amalonaticus, and C, diversus. C. freundii is known to occur as three varieties: C. freundii H₂S +, IND -, C. freundii H₂S +, IND +, and C. freundii H₂S -, IND -.

The role of Citrobacter in disease has not been investigated thoroughly. The organism is a normal inhabitant of the human intestine, being as common as Escherichia coli in infants. With age, the child's intestine begins to show a greater ratio of E. coli to Citrobacter (Nahhas, personal communication). Citrobacter has been …

Nuclear-Spin-Relaxation Study Of Internal Motion In Two Organic Molecular Solids, Alfonso M. Albano, Peter A. Beckmann, M. E. Carrington, E. E. Fisch, F. A. Fusco, A. E. O'Neill, Mary E. Scott

Physics Faculty Research and Scholarship

We investigate proton spin-lattice relaxation in two powdered organic molecular solids with reorienting methyl (CH3) and tert-butyl [C(CH3)3] groups: 3,5-di-tert-butylphenol (DTBP) and 1,3,5-tri-tert-butylbenzene (TTBZ). The temperature and Larmor frequency dependence of the relaxation rate is considerably more complicated than would be expected on the basis of random reorientations of the CH3 and C(CH3)3 groups. The spectral densities describing the relaxation are broader, and show more structure, than those customarily used to interpret relaxation data. Assuming that the spectral densities may be expressed as linear superpositions of Lorentzians, we are able to obtain a single, nonexponential correlation function which leads to …

A Re-Examination Of The Reactions Of Cyanide With Cytochrome C Oxidase, M. G. Jones, D. Bickar, M. T. Wilson, M. Brunori, A. Colosimo, P. Sarti

Chemistry: Faculty Publications

Experiments were performed to examine the cyanide-binding properties of resting and pulsed cytochrome c oxidase in both their stable and transient turnover states. Inhibition of the oxidation of ferrocytochrome c was monitored as a function of cyanide concentration. Cyanide binding to partially reduced forms produced by mixing cytochrome c oxidase with sodium dithionite was also examined. A model is presented that accounts fully for cyanide inhibition of the enzyme, the essential feature of which is the rapid, tight, binding of cyanide to transient, partially reduced, forms of the enzyme populated during turnover. Computer fitting of the experimentally obtained data to …

Peat Resources Of Maine - Volume 4: Southern And Western Maine, Cornelia C. Cameron, Michael K. Mullen, Carolyn A. Lepage

Maine Collection

Peat Resources of Maine - Volume 4: Southern and Western Maine

by Cornelia C. Cameron, Michael K. Mullen, Carolyn A. Lepage & Walter A. Anderson

Bulletin 31 - Maine Geological Survey, Department of Conservation, Augusta, Maine (1984).

Preparation of this report was supported by funds furnished by the U.S. Department of Energy, Grant No. DE-FG18-79ET14690, the Maine Office of Energy Resources, the Maine Geological Survey, and the U.S. Geological Survey.

Contents: Introduction / The Maine Peat Resource Evaluation Program / Geologic Setting of Maine Peat Deposits / Formation of Peat Deposits in Maine / Methods of Investigation / Identification of …

Tackling The Problem Off The Farm, C M. Croft

Journal of the Department of Agriculture, Western Australia, Series 4

Methods of redusing phosphorus losses from the catchment soils of the Peel-Harvey esturine system have been discussed in other articles in this Journal.

This article briefly discusses a range of 'off the farm' techniques to improve phosphorus flushing from Peel Inlet or Harvey Estuary to the sea and to treat the phosphorus and the algae. These techniques were among more than 100 management options evaluated by the Peel-Harvey Study Group.