Applications of Micellar Enzymology to Clean Coal Technology (open access)

Applications of Micellar Enzymology to Clean Coal Technology

The sequential addition of enzyme and H[sub 2]O[sub 2] during the reverse micelle incubation was found to enhance sulfoxidation, but levels of EPSn remained low. The triplicate addition of enzyme and H[sub 2]0[sub 2] during the reverse micelle incubation of EPS was found to enhance sulfoxidation to EPSn and unidentified material. Low conversion to EPSn was not due to the inability of the enzyme to oxidize EPSX in reverse micelles, since the latter was demonstrated with both commercially available and enzymatically synthesized EPSx as starting material. Chloroperoxidase in an AOT-isooctane reverse micelle solution also mediated production of a metabolite from DBT with characteristics consistent with DBTSx. The magnitude of conversion was enhanced to 10% of the starting material by triplicate addition of enyme and H[sub 2]0[sub 2]. The identity of this metabolite as DBTSx was verified by GC/MS. Chloroperoxidase in reverse micelles appears therefore to be a versatile catalyst for sulfoxidation of aliphatic and aromatic sulfur-containing model coal compounds.
Date: March 10, 1993
Creator: Walsh, C. T.
Object Type: Report
System: The UNT Digital Library
Productivity and injectivity of horizontal wells. Quarterly report, October 1--December 31, 1993 (open access)

Productivity and injectivity of horizontal wells. Quarterly report, October 1--December 31, 1993

A number of activities have been carried out in the last three months. A list outlining these efforts is presented below followed by brief description of each activity in the subsequent sections of this report: Progress is being made on the development of a black oil three-phase simulator which will allow the use of a generalized Voronoi grid in the plane perpendicular to a horizontal well. The available analytical solutions in the literature for calculating productivity indices (Inflow Performance) of horizontal wells have been reviewed. The pseudo-steady state analytic model of Goode and Kuchuk has been applied to an example problem. A general mechanistic two-phase flow model is under development. The model is capable of predicting flow transition boundaries for a horizontal pipe at any inclination angle. It also has the capability of determining pressure drops and holdups for all the flow regimes. A large code incorporating all the features of the model has been programmed and is currently being tested.
Date: March 10, 1993
Creator: Fayers, F. J.; Aziz, K. & Hewett, T. A.
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: LO93-018 (open access)

Texas Attorney General Opinion: LO93-018

Letter opinion issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Dan Morales, regarding a legal question submitted for clarification;Whether a court may assess fees and court costs in a proceeding under V.T.C.S article 6701d, section 143A,subsection(a)(1) (RQ-475).
Date: March 10, 1993
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Applications of Micellar Enzymology to Clean Coal Technology. Final Report (open access)

Applications of Micellar Enzymology to Clean Coal Technology. Final Report

The sequential addition of enzyme and H{sub 2}O{sub 2} during the reverse micelle incubation was found to enhance sulfoxidation, but levels of EPSn remained low. The triplicate addition of enzyme and H{sub 2}0{sub 2} during the reverse micelle incubation of EPS was found to enhance sulfoxidation to EPSn and unidentified material. Low conversion to EPSn was not due to the inability of the enzyme to oxidize EPSX in reverse micelles, since the latter was demonstrated with both commercially available and enzymatically synthesized EPSx as starting material. Chloroperoxidase in an AOT-isooctane reverse micelle solution also mediated production of a metabolite from DBT with characteristics consistent with DBTSx. The magnitude of conversion was enhanced to 10% of the starting material by triplicate addition of enyme and H{sub 2}0{sub 2}. The identity of this metabolite as DBTSx was verified by GC/MS. Chloroperoxidase in reverse micelles appears therefore to be a versatile catalyst for sulfoxidation of aliphatic and aromatic sulfur-containing model coal compounds.
Date: March 10, 1993
Creator: Walsh, C. T.
Object Type: Report
System: The UNT Digital Library
Anomalous effects of moderation in transportation and storage arrays - revisited (open access)

Anomalous effects of moderation in transportation and storage arrays - revisited

A number of anomalies have been observed for fissile material arrays. This paper will review anomalous behavior associated with interstitial array moderation and correct one previously-mis-identified anomaly. Most arrays show a maximum k{sub eff} with low-density water moderation. An earlier study, however, did not show this maximum for unreflected 5{times}5{times}5 and 10{times}10{times}10 arrays of 15-kg {sup 235}U spheres. Our present calculations with MCNP and KENO V.a, however, show low-density maximums for both unreflected and reflected arrays of these units. We conclude that the earlier calculations for unreflected arrays were in error -- perhaps due to problem setup or code errors. The reactivity enhancement due to fissile material density reductions, however, still exits and is now seen to occur for both unreflected and water-reflected arrays.
Date: March 10, 1993
Creator: Yearwood, D.; Clayton, E. D. & Koponen, B. L.
Object Type: Article
System: The UNT Digital Library
Hungry Horse Dam Fisheries Mitigation Implementation Plan, 1990-2003 Progress (Annual) Report. (open access)

Hungry Horse Dam Fisheries Mitigation Implementation Plan, 1990-2003 Progress (Annual) Report.

In this document the authors present mitigation implementation activities to protect and enhance resident fish and aquatic habitat affected by the construction and operation of Hungry Horse Dam. This plan only addresses non-operational actions (mitigation measures that do not affect dam operation) described in the 'Fisheries Mitigation Plan for Losses Attributable to the Construction and Operation of Hungry Horse Dam' (Mitigation Plan) submitted to the Northwest Power Planning Council (Council) in March 1991 and in accordance with subsequent Council action on that Mitigation Plan. Operational mitigation was deferred for consideration under the Columbia Basin System Operation Review (SOR) process. This document represents an implementation plan considered and conditionally approved by the Council in March of 1993.
Date: March 10, 1993
Creator: Montana. Department of Fish, Wildlife, and Parks.
Object Type: Report
System: The UNT Digital Library
Russian-Japanese Impasse and Its Implications (open access)

Russian-Japanese Impasse and Its Implications

Relations between Russia and Japan are seriously strained. At the heart of the impasse is a territorial dispute over a group of islands seized by the Soviet Union in 1945 and claimed by both countries. The Japanese Government maintains that there can be no normalization of relations between the two countries until Russia agrees to return the islands. Japan may refuse to participate in large-scale economic assistance to Russia until it is satisfied on the territorial question.
Date: March 10, 1993
Creator: Goldman, Stuart D.
Object Type: Report
System: The UNT Digital Library