UNT Libraries Government Documents Department - 130 Matching Results

Search Results

prev Results: 121 - 130
open access

Tricarbalyllic Acid (Propane-1, 2, 3-Tricarboxylic Acid)

Description: From report : "Tricarbalyllic acid (propane-1, 2, 3-tricarboxylic acid) has a structure similar to that of citric acid, except that it lacks the hydroxyl group attached to the middle of the carbon atom. Properties of the rare earth citrates have been used very successfully in the separation of rare earths by ion exchange methods; consequently it was deemed advisable to study the rare-earth compounds which form with the anion if triarbalyllic acid."
Date: 1964
Creator: Gupta, A. K. & Powell, J. E.
Item Type: Refine your search to only Report
open access

Trimethyllactamide

Description: Technical report. From "3. Methods of Preparation" : "Pivadehyde cyanohydrin can be prepared by the reaction of pivadehyde with anhydrous HCN2 or by the sodium bisulfite process. Trimethyllactamide can be prepared by hydrolysis of pivaldehyde cyanohydrin with cold concentrated sulfuric acid. The procedure described here differs in the scale of preparation an in the use of cold fusing hydrochloric acid for hydrolizing the cyanohydrin."
Date: May 9, 1963
Creator: Powell, Jack E.
Item Type: Refine your search to only Report
open access

The Uranium-Rhenium Alloy System

Description: Abstract The phase diagram of the uranium-rhenium alloy system is presented along with a discussion on transformation kinetics of the uranium solid solutions. The phase diagram is of the double eutectic type with the intermediate phase having the composition URe2. This phase exhibits allotropy at 180°C and melts congruently at 2200°C. URe2 reacts sluggishly with the uranium solid solutions below 750°C to form the peritectoid compound U2Re. Eutectic reactions occur at 1105° and 2105°C at respec… more
Date: January 14, 1963
Creator: Jackson, R. J. (Robert James), 1929-; Williams, D. E. & Larsen, W. L.
Item Type: Refine your search to only Report
open access

The Vapor Pressures of VCl2, VCl3, VBr2, and VBr3 by Knudsen Effusion

Description: Technical report. From Abstract : "The vapor pressures of crystalline VCl2, VBr2, VCl3 and VBr3 have been measured by the Knudsen effusion method using pyrex and Vycor effusion cells. ... During the measurements on VCl3 and VBr3 dissociation and disproportionation of the samples occurred simultaneously with the simple vaporization. However, because the product of each of these processes was collected separately during an experiment, the vapor pressure due to sublimation was obtained without dif… more
Date: August 21, 1962
Creator: McCarley, R. E. & Roddy, J. W.
Item Type: Refine your search to only Report
open access

͟v͟ic-Dioximes as Analytical Reagents

Description: This technical report discusses the synthesis of vic-dioximes, the analysis of vic-dioximes, the structure of vic-dioximes, the structure of metal(II)-vic-dioxime complexes, and analytical applications of this research. The report includes tables and figures that accompany the report's contents and findings.
Date: March 19, 1962
Creator: Banks, Charles V.
Item Type: Refine your search to only Report
open access

The Weighting of Intensities

Description: Technical report. From report : "The method of least squares refinement is based on the prediction of the theory of errors that, if the errors of the observed structure factors follow the Gaussian distribution, the most nearly correct atomic parameters will be those which result in the minimization of the residual R = Σi [√wi(|Fo| - |Fc|)i]2."
Date: December 13, 1962
Creator: Hershaft, Alex & Corbett, John D.
Item Type: Refine your search to only Report
open access

X-Ray Analytical Spectroscopy of the Rare Earths

Description: Technical report. From Abstract : "The term 'rare earths' is the classic name given to the group of elements with atomic numbers 57 to 71. The element yttrium is usually included in this group. The chemical properties of these elements are so strikingly similar that they always occur together in nature and their separation from each other is a singularly difficult task. With but few exceptions, mixtures of these elements have also defied analysis by classical methods of analytical chemistry. Co… more
Date: September 1962
Creator: Heidel, Robert H. & Fassel, Velmer A.
Item Type: Refine your search to only Report
open access

The Y-Nd and Sc-Nd Phase Systems

Description: Technical report. From Introduction : "In a recent study by Spedding, et al. on some rare earth alloy systems, an intermediate phase was found to form when a light rare earth (ABAC stacking) was alloyed with a heavy rare earth (ABAC stacking). This intermediate phase was found to have the structure of samarium metal with the stacking ABABCBCAC and was designated "delta". Since the cause of this rather unusual structure occurring in either samarium metal or these alloys is not known the study of… more
Date: February 1964
Creator: Beaudry, B. J.; Michel, M.; Daane, A. H. & Spedding, F. H.
Item Type: Refine your search to only Report
open access

αZ Correction to the Bethe-Maximon Pair Production Cross Section

Description: From abstract: "The first order correction in αZ to the Bethe-Maximon pair production cross section is calculated for the case where the incident photon and one of the electrons has an energy much greater than mc2. Comparison of these calculations to the experimental data of Plimpton and Hammer shows an improvement ina greement between theory and experiment of approximately a factor of 1+(αZ4π/15) for low positron kinetic energies. However, for positron kinetic energies of the order of 1 Mev no… more
Date: March 21, 1962
Creator: Moroi, David S. & Hammer, C. L.
Item Type: Refine your search to only Report
Back to Top of Screen