Digital Commons Network^™

Ab Initio Comparison Of H Bonds And Li Bonds. Complexes Of Lif, Licl, Hf, And Hcl With Nh3, Z. Latajka, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Ab initio calculations are carried out on the complexes H₃N–LiF, H₃N–LiCl and their analogs H₃N–HF and H₃N–HCl as well as the isolated subunits. Double‐zeta basis sets, augmented by two sets of polarization functions, are used in conjunction with second‐order Moller–Plesset perturbation theory (MP2) for evaluation of electron correlation effects. The Li bonds are found to be substantially stronger than their H‐bonding counterparts, due in large measure to the greater dipole moments of the LiX subunits. Correlation has a large effect on the geometry and energetics of …

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 …

Studies Of Dispersion Energy In Hydrogen‐Bonded Systems. H2o–Hoh, H2o–Hf, H3n–Hf, Hf–Hf, M. M. Szczesniak, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Dispersion energy is calculated in the systems H₂O–HOH, H₂O–HF, H₃N–HF, and HF–HF as a function of the intermolecular separation using a variety of methods. M≂ller–Plesset perturbation theory to second and third orders is applied in conjunction with polarized basis sets of 6‐311G∗∗ type and with an extended basis set including a second set of polarization functions (DZ+2P). These results are compared to a multipole expansion of the dispersion energy, based on the Unsöld approximation, carried out to the inverse tenth power of the intermolecular distance. Pairwise evaluation is also carried out using both atom–atom …

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% …

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 …

Proton Transfers Between First‐ And Second‐Row Atoms: (H2ohsh2)+ And (H3nhsh2)+, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Ab initio molecular orbital methods are used to study the transfer of the central proton along the hydrogen bonds in (H₂OHSH₂)⁺ and (H₃NHSH₂)⁺. Proton transfer potentials are generated using the 4‐31G∗ basis set at the Hartree–Fock level for various values for the hydrogen bond length R(XS). Full geometry optimizations are carried out at each stage of proton transfer. The barrier to proton transfer increases as the hydrogen bond is lengthened. For a given bond length, the highest barriers are observed for transfer from …

General Catalog 1984-1986, Utah State University

University Catalogs

General Catalog of 1984-1986

Contains course descriptions, University college calendar, and college administration.

Assessment Of Potential Irrigation Water Needs In The Bayou Meto Watershed, Richard C. Peralta, Paul W. Dutram

Civil and Environmental Engineering Faculty Publications

No abstract provided.

The Effects Of Climatic Factors And Still Design On Solar Earth‑Water Distillation For Saturated Sand, Timothy M. Skergan, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

No abstract provided.

The Application And Effectiveness Of Slow Sand Filtration In The United States, L. A. Slezak, Ronald C. Sims

Biological Engineering Faculty Publications

A survey of 27 slow sand filtration plants in the United States indicated that most of these plants are currently serving communities of fewer than 10 000 persons, are more than 50 years old, and are effective and inexpensive to operate. A slow sand filtration research facility in Logan, Utah, was compared with the operating plants to determine if locally available, unsieved sand achieved similar results. The 75‐m³/d research facility performed well in removing turbidity, coliform bacteria, and particles of a size representative of Giardia cysts.

Human Health Effects Assays, Ronald C. Sims, J. L. Sims, R. R. Dupont

Biological Engineering Faculty Publications

Current development and use of short-term bioassays to evaluate potential human health hazards of environmental chemical exposure has been the focus of the U. S. Environmental Protection Agency (EPA) Second and Third Symposia on the Ap plication of Short-Term Bioassays in the Analysis of Complex Environmental Mixtures.¹'² Topics addressed included development and applications of bioassays, collection and preparation of environmental samples, characterization of hazardous components using bioassays, and environmental assessment. Bartsch and Tomabis,³ using six mutagenicity assays including sub mammalian and mammalian assays to evaluate the quantitative relationship between carcinogenicity and mutagenicity for 532 chemicals, concluded …

Review Of In-Place Treatment Techniques For Contaminated Surface Soils - Volume 2: Background Information For In Situ Treatment, Ronald C. Sims, Darwin L. Sorensen, Judith Sims, Joan E. Mclean, Ramzi Mahmood, R. Ryan Dupont

Reports

This second volume of a two volume manual on in-place treatment of hazardous waste contaminated soil supports the treatment methodology described in Volume 1 (EPA- ). The information presented on monitoring to determine treatment effectiveness, characterization and evaluation of the behavior and fate of hazardous constituents in soil/waste systems, and properties (including adsorption, degradation, and volatilization parameters) for various compounds is intended to help the manual user in making more complex decisions and in selecting analyses concerning site, soil, and waste interactions. This report was submitted in partial fulfillment of Contract No. 68-03-3113 by Utah State University under the sponsorship …

Direct Filtration Versus Conventional Water Treatment In The Intermountain Region, Susan K. Burns, V. Dean Adams, Steel B. Maloney

Reports

The direct filtration water treatment scheme does not include sedimentation and in some cases flocculation. Compared to conventional treatment, direct filtration has lowered capital costs, reduced space requirements, decreased sludge quantities, and reduced coagulant dosages. One objective of this research was the statistical comparison of the direct filtration, Utah Valley Water Purification Plant (Orem, Utah) and the conventional Little Cottonwood Water Treatment Plant (Salt Lake City, Utah). These treatment plants are the two most compatible treatment plants having the highest correlation of source water in the local area. The Little Cottonwood plant receives approximately 65 percent of its sources water …

Solar Earth‑Water Distillation For Wet Sand, Richard C. Peralta, Timothy M. Skergan, David B. Marx

Civil and Environmental Engineering Faculty Publications

Solar earth-water distillation is a means of extracting moisture from an earth medium. Three designs of the hot-box type of solar earth-water still were tested using wet or saturated sand. The designs included: low height with reflective interior siding, tall height with reflective siding and tall height with absorptive siding. The daily volume of distillate from different designs was compared. A twenty-centimeter-tall still with reflective siding produced significantly greater yields than one twice as tall. No significant difference in the yield between tall stills with light-absorptive versus light reflective interior siding was found. A regression equation was developed to predict …

Using Target Levels To Develop A Sustained Yield Pumping Strategy And Its Applicability In Arkansas, A Riparian Rights State, Richard C. Peralta, Ann W. Peralta

Civil and Environmental Engineering Faculty Publications

Groundwater is the major source of water for consumptive use in Arkansas. Significant pumping is concentrated in areas of agricultural and industrial production. In a number of these areas, including much of the Grand Prairie region of Arkansas, average annual withdrawal from the aquifer exceeds recharge. As a result of this groundwater mining, water levels are dropping. Mining which leads to excessive declines in the water level can accelerate salt water intrusion in an aquifer, cause aquifer compaction, make irrigation economically unfeasible, and eventually disrupt an economy based upon groundwater. Generally, these problems can be prevented or limited by maintaining …

Water For The 21st Century, Will It Be There?, Richard C. Peralta, Ann W. Peralta, Leslie E. Mack

Civil and Environmental Engineering Faculty Publications

One of Arkansas' major water management goals is to provide adequate water for agriculture, the economic mainstay of the state. Effective water management requires inputs from engineering, economics, law, administration, and environmental concern, all in a matrix of public education, participation and communications. Groundwater levels in eastern Arkansas have been dropping for decades as irrigation for rice, other row crops, and fish farming have increased substantially. Additional surface water supplies are available from the adjacent rivers but there are competition, conflict of use, and jurisdictional problems involved. A critical path sequence chart was designed to include all the research steps …

Projected 1992 Groundwater Levels On The Arkansas Grand Prairie, Richard C. Peralta, Aminollah Yazdanian

Civil and Environmental Engineering Faculty Publications

The Arkansas Grand Prairie has been a major rice producing area for most of this century. The irrigation water required for rice, and at the present time, for soybeans, is primarily obtained from a Quaternary aquifer. This extensive formation underlies much of eastern Arkansas as well as parts of other states. Groundwater enters the Grand Prairie region from extensions of the aquifer lying outside of the area. Prolonged pumping of water from the aquifer at a rate exceeding the recharge rate has significantly reduced Quaternary groundwater levels in the Grand Prairie.

Time‑Varient Water Needs Of The Boeuf‑Tensas Basin, Paul W. Dutram, Richard C. Peralta, Paul J. Killian

Civil and Environmental Engineering Faculty Publications

No abstract provided.

The Utah Statesman, December 7, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, December 5, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, December 2, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Plant Information Network (Pin) Data Base: Colorado, Montana, North Dakota, Utah, And Wyoming, United States Department Of The Interior, Fish And Wildlife Service

Plants

This publication provides introductory information on the Plant Information Network (PIN) and a print-out of PIN data. The PIN was a computerized data base containing information on native and naturalized vascular plants of five Western States. Information was included on over 5,000 species found in Colordo, Montana, North Dakota, Utah, and Wyoming. Because of funding restrictions PIN is no longer operated as a computerized data base. This publication makes the PIN data available to resource managers, planners, and others who have a continuing need for this information.

Approximately 500 descriptors were included in the data base for each species. These …

A Microsystem Sediment-Water Simulation Study For The Proposed Jordanelle Reservoir, Heber City, Utah, United States Department Of The Interior, Bureau Of Reclamation

Water

The technique of microsystem sediment-water simulation was used to predict water quality data for the proposed Jordanelle Reservoir, Heber City, Utah. Simulation microsystems were prepared for four sites located in the north arm of the reservoir basin including two sites located in an abandoned acid mine tailings pond. Data obtained from the tailings pond microsystems indicated that low pH water and high trace metal concentrations will exist in the north arm of the reservoir. These data suggested that some kind of membrane or compacted earth lining will be necessary to seal and contain the mine spoilage. Other sites in the …

Mst Radar Data-Base Management, Vincent B. Wickwar

All Physics Faculty Publications

No abstract provided.

Utah Science Vol. 44 No. 4, Winter 1983

Utah Science

91 TURKEY NUTRITION – The DNA Breakdown J.O. Anderson Feed quality and genetics are crucial considerations for poultry producers. The protein component of the diet has special significance. Even so, different strains of birds may vary in how they use identical diets.

94 THE BUILDING OF TURKEYS R.E. Warnick They may not look it, but turkeys are relatively frail birds. Researchers at Snow Field Station are therefore trying to help producers water effectively t their nutritional, housing, and general environmental needs.

98 IRON CHLOROSIS – THE Role for Iron in Chlorophyll Formation G.W. Miller and J.C. Pushnik Where and how …

The Utah Statesman, November 30, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Thomas Moran In Utah, Gaell Lindstrom

Faculty Honor Lectures

On July 9, 1873, Thomas Moran wrote to his wife Mary from Salt Lake City: "In the afternoon Powell and I went to Brigham Young's house and I was introduced to all the leading Mormons. There was Brig[ham] Young. Geo. A. Smith second man in power. Bishop Nusser [Musser]. Bishop Cannon. The editor of the Mormon paper and delegate to Congress. Bishop Hooper and some other Mormon high priests. They are very much like the rest of mankind and all smart fellows."l Moran came to Salt Lake via the Union Pacific Railroad to meet John Wesley Powell of Colorado River …

The Utah Statesman, November 28, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, November 21, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, November 18, 1983, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.