The Hy-Redshift Universe: Galaxy Formation and Evolution at High Redshift (open access)

The Hy-Redshift Universe: Galaxy Formation and Evolution at High Redshift

Hyron Spinrad's career has spanned several decades, and has stretched from our neighboring planets to the most remote galaxies in the Universe, pausing in between to ''enrich'' our knowledge of the compositions of stars.
Date: November 3, 1999
Creator: Bunker, A. J. & van Breugel, W. J. M.
System: The UNT Digital Library
Field Demonstrations of Logging Technologies for Reservoir Characterization (open access)

Field Demonstrations of Logging Technologies for Reservoir Characterization

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Date: February 3, 1999
Creator: Fowler, M.L.; Johnson, W.I.; Safley, L.E.; Schatzinger, R.A.; Sharma, B. & Szpakiewicz, M.J.
System: The UNT Digital Library
SUBAQUEOUS DISPOSAL OF MILL TAILINGS (open access)

SUBAQUEOUS DISPOSAL OF MILL TAILINGS

A study of mill tailings and sulfide minerals was carried out in order to understand their behavior under subaqueous conditions. A series of electrochemical experiments, namely, cyclic voltammetry, electrochemical impedance spectroscopy and galvanic coupling tests were carried out in artificial seawater and in pH 6.8 buffer solutions with chloride and ferric salts. Two mill tailings samples, one from the Kensington Mine, Alaska, and the other from the Holden Mine, Washington, were studied along with pyrite, galena, chalcopyrite and copper-activated sphalerite. SEM analysis of mill tailings revealed absence of sulfide minerals from the Kensington Mine mill tailings, whereas the Holden Mine mill tailings contained approximately 8% pyrite and 1% sphalerite. In order to conduct electrochemical tests, carbon matrix composite (CMC) electrodes of mill tailings, pyrite and galena were prepared and their feasibility was established by conducting a series of cyclic voltammetry tests. The cyclic voltammetry experiments carried out in artificial seawater and pH 6.8 buffer with chloride salts showed that chloride ions play an important role in the redox processes of sulfide minerals. For pyrite and galena, peaks were observed for the formation of chloride complexes, whereas pitting behavior was observed for the CMC electrodes of the Kensington Mine mill tailings. …
Date: September 3, 1999
Creator: Mendiratta, Neeraj K.; Yoon, Roe-Hoan & Richardson, Paul
System: The UNT Digital Library
The Human Genome Project and Mental Retardation: An Educational Program. Final Progress Report (open access)

The Human Genome Project and Mental Retardation: An Educational Program. Final Progress Report

The Arc, a national organization on mental retardation, conducted an educational program for members, many of whom have a family member with a genetic condition causing mental retardation. The project informed members about the Human Genome scientific efforts, conducted training regarding ethical, legal and social implications and involved members in issue discussions. Short reports and fact sheets on genetic and ELSI topics were disseminated to 2,200 of the Arc's leaders across the country and to other interested individuals. Materials produced by the project can e found on the Arc's web site, TheArc.org.
Date: May 3, 1999
Creator: Davis, Sharon
System: The UNT Digital Library