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Palladium Catalyzed Coupling Reactions: Mechanism of Reductive Elimination. Progress Report, October 1, 1979-September 30, 1980. [Ethane Elimination]

Description: The 1,1-reductive elimination of ethane from three cis-bis(phosphine)-dimethylpalladium complexes, L/sub 2/Pd(CH/sub 3/)/sub 2/ (L = PPh/sub 3/, PPh/sub 2/,CH/sub 3/ and L/sub 2/ = Ph/sub 2/PCH/sub 2/CH/sub 2/PPh/sub 2/), and three trans analogs (L = PPh/sub 3/, PPh/sub 2/CH/sub 3/ and L/sub 2/ = 2,11-bis(diphenylphosphinomethyl)benzo(c)phenanthrene (TRANSPHOS)) was carried out. The three cis complexes underwent reductive elimination in the presence of coordinating solvents (DMSO, DMF, and THF)… more
Date: September 1, 1980
Creator: Stille, J. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Planetary-Wave Behavior and Arctic Air Pollution

Description: An attempt was made to relate episodes of air pollution at Barrow, Alaska, containing vanadium, to the behavior of planetary waves in middle and high latitudes. A stationarity index for planetary waves is defined as the ratio between amplitudes computed from monthly mean maps and the mean amplitudes computed on a daily basis and averaged over the same month, irrespective of phase angle. Longitude-time sections of 500-mb height anomalies at various latitudes are related to vanadium pollution epi… more
Date: January 1, 1979
Creator: Reiter, Elmar R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rio Blanco Massive Hydraulic Fracture: Project Definition

Description: The Piceance Basin in Colorado contains an estimated 600 trillion cu ft of natural gas in place. Both the Rulison and Rio Blanco events have been detonated to determine the feasibility of nuclear fracturing to stimulate natural gas production in this basin. A demonstration program to test the relative effectiveness of massive hydraulic fracturing (MHF) to achieve natural gas production stimulation from the same gas reservoir is presented. Details are included on MHF design parameters, including… more
Date: 1973~
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Steady-State Thermomechanical Finite Element Analysis of Elastoviscoplastic Metal Forming Processes

Description: Extrusion and rolling processes exhibiting large amounts of plastic flow are analyzed using a finite element technique that is based on a modified creeping viscous flow approximation. The technique, called the initial stress-rate method, iteratively corrects creeping viscous flow solutions to generate results that include elastic response. The momentum equations have been coupled with the energy equation to provide the capability to predict thermomechanical response during forming operations.
Date: January 1, 1977
Creator: Dawson, P.R. & Thompson, E.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Novel Concepts in Electrochemical Solar Cells. Third Quarterly Progress Report, November 15, 1979-January 15, 1980. [Molten Salt Electrolytes]

Description: Efforts have been primarily directed toward evaluation of the room temperature molten salt electrolyte in terms of its overall performance for photovoltaic cells. Mass transport processes may prove to be the rate-limiting factor for such electrolytes, unless the concentration of the photo-active redox component can be increased and the solvent viscosity reduced. Acid-base surface chemistry of n-GaAs as occurs in aqueous systems, has been found present and its consequences will be further explor… more
Date: January 1, 1980
Creator: DuBow, J.; Job, R. & Krishnan, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Diosmacycloalkanes as models for the formation of hydrocarbons from surface methylenes

Description: We are making progress on our investigation of the mechanism of olefin exchange with Os{sub 2}(C{sub 2}H{sub 4})(CO){sub 8}. We are probing this system by kinetic study of the reaction of Os{sub 2}(C{sub 2}H{sub 4})(CO){sub 8} with butyl acrylate (BA) under various pressures of ethylene.
Date: May 1, 1992
Creator: Norton, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Candidate Recommendation INT-0013

Description: Public Document - Recommendation to realign Counterintelligence Field Activity in Colorado Springs, CO., to Peterson AFB, CO.
Date: August 2, 2005
Creator: United States. Department of Defense.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department

Life with a Superhero: Raising Michael Who Has Down Syndrome

Description: Over twenty years ago, in a small Israeli town, a desperate mother told a remarkable lie. She told her friends and family that her newborn child had died. That lie became the catalyst for the unfolding truth of the adoption of that same baby—Michael —who is, in fact, very much alive and now twenty-two years old. He also has Down syndrome. When Kathryn Hulings adopted Michael as an infant, she could not have known that he would save her life when she became gravely ill and was left forever physi… more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: July 15, 2013
Creator: Hulings, Kathryn U.
Item Type: Refine your search to only Book
Partner: UNT Press
open access

Geology and Mineralogy of the J.J. Mine, Jo Dandy Area, Montrose County, Colorado

Description: Introduction: Detailed geologic mine mapping and sampling of the J.J. mine in the Jo dandy area, Montrose County, Colo., were undertaken to study a vanadium-uranium ore body in terms of the physical relationships of ore to host rock, the paragenetic sequence of ore minerals, and the sequential development of an oxidized suite of ore minerals from unoxidized ore.
Date: September 1955
Creator: Elston, Donald Parker & Botinelly, Theodore
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tectonic Map of Northern Colorado and Northeastern Utah, Showing the Distribution of Uranium Deposits

Description: From introduction: The compilation of the tectonic map of northern Colorado and northeastern Utah (area h, fig. 2) was done by the U. S. Geological Survey on behalf of the Division of Raw Materials of the U. S. Atomic Energy Commission. Structures shown on the map have been obtained from published geologic maps, and from unpublished data supplied by government agencies, private companies, and independent geologists. The various structures of the Foreland can be divided into three large classes … more
Date: April 1956
Creator: Osterwald, Frank W. & Dean, Basil G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Ammonium Carbonate Pressure Leaching of Uranium Ores Proposed as Feed to the Pilot Plant at Grand Junction, Colorado : Progress Report

Description: From introduction: This is Progress report BMI-282, the first of a series covering the operation of the pressure-leaching towers for the extraction of uranium by an ammonium carbonate leach...This report discusses the data obtained from tests run to show the effects of such variables as the amount of air and carbon dioxide passed through the pulp, temperature, pressure, and concentration of ammonium carbonate and ammonium bicarbonate in the leach solution on the extraction of uranium.
Date: June 15, 1955
Creator: Wheeler, C. M.; Langston, B. G. & Stephens, F. M., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Investigation of the Importance of the Art of Hand Lettering in the Field of Advertising Art

Description: This thesis concerns the utility of including the art of hand lettering in a curriculum of a university advertising art program. Data secured from 155 questionnaires sent to 266 advertising firms in five states were analyzed by simple descriptive statistics including frequency counts and percentages. Two hypotheses were examined, and it is concluded that hand lettering is still needed in advertising art and should be taught in university art programs.
Date: August 1977
Creator: Greer, Hiram V.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Study of Remote Military Power Applications: Report 5, NORAD

Description: From introduction: The study is essentially an economic evaluation of the construction and operation of nuclear power plants at several designated military installations where increased power generating capabilities of 5 to 40 mwe may be required by the Government during the period 1963 through 1970.
Date: July 1960
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Food Habits of Stoneflies (Plecoptera) in the Gunnison and Dolores Rivers, Colorado

Description: Gut contents of 2,500 stonefly nymphs, comprising 10 species, from the Gunnison and Dolores Rivers, Colorado were examined from Dec., 1974-Oct., 1975. Perlidae species were carnivorous feeding primarily on chironomids, mayflies and caddisflies. Seasonal patterns of ingestion and preference varied among species and predator sizes and between rivers. Early instar polyphagous species utilized detritus in the fall, eventually shifting to carnivorous habits as they grew through winter-spring. Pteron… more
Date: August 1976
Creator: Fuller, Randall L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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