Resource Type

Rigidity Magnetic Field, and Inflector Voltage Based on Frequency Measurements in Booster (open access)

Rigidity Magnetic Field, and Inflector Voltage Based on Frequency Measurements in Booster

N/A
Date: December 1, 2003
Creator: Gardner, C. J.
System: The UNT Digital Library
Permanganate Treatment of DNAPLs in Reactive Barriers and Source Zone Flooding Schemes (open access)

Permanganate Treatment of DNAPLs in Reactive Barriers and Source Zone Flooding Schemes

Permanganate is a simple and common chemical, which has proven useful in oxidizing common chlorinated solvents. Due to the nature of oxidation, the byproducts and products are much less harmful than those from reduction-type remedial schemes, and the degradation process is rapid. The main goal of this project is to understand oxidative destruction of chlorinated solvents using potassium permanganate. The study has provided a theoretical basis for evaluating the feasibility of in-situ applications, to couple kinetic reaction with transport models, and to develop an appropriate field test for further assessing the approach.
Date: December 23, 2003
Creator: Schwartz, F. W. & Zhang, H.
System: The UNT Digital Library
Development And Evaluation Of Stable Isotope And Fluorescent Labeling And Detection Methodologies For Tracking Injected Bacteria During In Situ Bioremediation (open access)

Development And Evaluation Of Stable Isotope And Fluorescent Labeling And Detection Methodologies For Tracking Injected Bacteria During In Situ Bioremediation

This report summarizes the results of a research project conducted to develop new methods to label bacterial cells so that they could be tracked and enumerated as they move in the subsurface after they are introduced into the groundwater (i.e., during bioaugmentation). Labeling methods based on stable isotopes of carbon (13C) and vital fluorescent stains were developed. Both approaches proved successful with regards to the ability to effectively label bacterial cells. Several methods for enumeration of fluorescently-labeled cells were developed and validated, including near-real time microplate spectrofluorometry that could be performed in the field. However, the development of a novel enumeration method for the 13C-enriched cells, chemical reaction interface/mass spectrometry (CRIMS), was not successful due to difficulties with the proposed instrumentation. Both labeling methodologies were successfully evaluated and validated during laboratory- and field-scale bacterial transport experiments. The methods developed during this research should be useful for future bacterial transport work as well as other microbial ecology research in a variety of environments. A full bibliography of research articles and meeting presentations related to this project is included (including web links to abstracts and full text reprints).
Date: December 17, 2003
Creator: Fuller, Mark E. & Onstott, Tullis C.
System: The UNT Digital Library
Chem-Prep PZT 95/5 for neutron generator applications : development of laboratory-scale powder processing operations. (open access)

Chem-Prep PZT 95/5 for neutron generator applications : development of laboratory-scale powder processing operations.

Chemical synthesis methods are being developed as a future source of PZT 95/5 powder for neutron generator voltage bar applications. Laboratory-scale powder processes were established to produce PZT billets from these powders. The interactions between calcining temperature, sintering temperature, and pore former content were studied to identify the conditions necessary to produce PZT billets of the desired density and grain size. Several binder systems and pressing aids were evaluated for producing uniform sintered billets with low open porosity. The development of these processes supported the powder synthesis efforts and enabled comparisons between different chem-prep routes.
Date: December 1, 2003
Creator: Montoya, Ted V.; Moore, Roger Howard & Spindle, Thomas Lewis Jr.
System: The UNT Digital Library
Heavy Quark Physics (open access)

Heavy Quark Physics

The results from the FOCUS experiment at Fermilab in which UPR participated. Plans for the BTeV experiment.
Date: December 1, 2003
Creator: Lopez, Angel M.
System: The UNT Digital Library
Equations of state for hydrogen and deuterium. (open access)

Equations of state for hydrogen and deuterium.

This report describes the complete revision of a deuterium equation of state (EOS) model published in 1972. It uses the same general approach as the 1972 EOS, i.e., the so-called 'chemical model,' but incorporates a number of theoretical advances that have taken place during the past thirty years. Three phases are included: a molecular solid, an atomic solid, and a fluid phase consisting of both molecular and atomic species. Ionization and the insulator-metal transition are also included. The most important improvements are in the liquid perturbation theory, the treatment of molecular vibrations and rotations, and the ionization equilibrium and mixture models. In addition, new experimental data and theoretical calculations are used to calibrate certain model parameters, notably the zero-Kelvin isotherms for the molecular and atomic solids, and the quantum corrections to the liquid phase. The report gives a general overview of the model, followed by detailed discussions of the most important theoretical issues and extensive comparisons with the many experimental data that have been obtained during the last thirty years. Questions about the validity of the chemical model are also considered. Implications for modeling the 'giant planets' are also discussed.
Date: December 1, 2003
Creator: Kerley, Gerald Irwin (Kerley Technical Services, Appomattox, VA)
System: The UNT Digital Library