UNT Libraries Government Documents Department - 2,961 Matching Results

Search Results

Results: 1 - 24 next
open access

The Effect of Chemical Additives on the Synthesis of Ethanol

Description: The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different electronegativeities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experim… more
Date: April 30, 1989
Creator: Chuang, S. S. C.
Item Type: Refine your search to only Report
open access

The Effect of Chemical Additives on the Synthesis of Ethanol. Technical Progress Report 6, December 16, 1988--March 15, 1989

Description: The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different electronegativeities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experim… more
Date: April 30, 1989
Creator: Chuang, S. S. C.
Item Type: Refine your search to only Report
open access

Magnet design technical report---ITER definition phase

Description: This report contains papers on the following topics: conceptual design; radiation damage of ITER magnet systems; insulation system of the magnets; critical current density and strain sensitivity; toroidal field coil structural analysis; stress analysis for the ITER central solenoid; and volt-second capabilities and PF magnet configurations.
Date: April 28, 1989
Creator: Henning, C. (ed.)
Item Type: Refine your search to only Report
open access

Removal of organic and inorganic sulfur from Ohio coal by combined physical and chemical process. Final report

Description: This project consisted of three sections. In the first part, the physical cleaning of Ohio coal by selective flocculation of ultrafine slurry was considered. In the second part, the mild oxidation process for removal of pyritic and organic sulfur.was investigated. Finally, in-the third part, the combined effects of these processes were studied. The physical cleaning and desulfurization of Ohio coal was achieved using selective flocculation of ultrafine coal slurry in conjunction with froth flot… more
Date: April 28, 1989
Creator: Attia, Y. A.; Zeky, M. El.; Lei, W. W.; Bavarian, F. & Yu, S.
Item Type: Refine your search to only Report
open access

ZPPR progress report, January 1989 through April 1989

Description: Further results are presented from the large, homogeneous assembly ZPPR-18 in the JUPITER-III program. Reaction rate results are given for ZPPR-18B along with measured gamma ray dose results from ZPPR-18A and 18B. Control rod worth results from the ZPPR-18 assemblies are included. Calculation models, measured and calculated k-effective values and measured sodium worth values, are presented for the ZPPR-19 assemblies of the lo program.
Date: April 27, 1989
Creator: Collins, P.J. & Brumbach, S.B.
Item Type: Refine your search to only Report
open access

GPHS (General Purpose Heat Source) uranium oxide encapsulations supporting satellite safety tests

Description: General Purpose Heat Source (GPHS) simulant-fueled capsules were assembled, welded, nondestructively examined, and shipped to Los Alamos National Laboratory (LANL) for satellite safety tests. Simulant-fueled iridium capsules contain depleted uranium oxide pellets that serve as a stand-in for plutonium-238 oxide pellets. Information on forty seven capsules prepared during 1987 and 1988 is recorded in this memorandum along with a description of the processes used for encapsulation and evaluation.… more
Date: April 24, 1989
Creator: Kanne, W. R.
Item Type: Refine your search to only Report
open access

Student science enrichment training program: Progress report, June 1, 1988--May 31, 1989

Description: This is a status report on a Student Science Enrichment Training Program held at the campus of Claflin College, Orangeburg, SC. The topics of the report include the objectives of the project, participation experienced, financial incentives and support for the program, curriculum description, and estimated success of the program in stimulating an occupational interest in science and research fields by the students.
Date: April 21, 1989
Creator: Sandhu, S. S.
Item Type: Refine your search to only Report
open access

MHD compressor---expander conversion system integrated with GCR inside a deployable reflector

Description: This work originates from the proposal MHD Compressor-Expander Conversion System Integrated with a GCR Inside a Deployable Reflector''. The proposal concerned an innovative concept of nuclear, closed-cycle MHD converter for power generation on space-based systems in the multi-megawatt range. The basic element of this converter is the Power Conversion Unit (PCU) consisting of a gas core reactor directly coupled to an MHD expansion channel. Integrated with the PCU, a deployable reflector provides… more
Date: April 20, 1989
Creator: Tuninetti, G. (Ansaldo S.p.A., Genoa (Italy). Research Div.); Botta, E.; Criscuolo, C.; Riscossa, P. (Ansaldo S.p.A., Genoa (Italy). Nuclear Div.); Giammanco, F. (Pisa Univ. (Italy). Dipt. di Fisica) & Rosa-Clot, M. (Florence Univ. (Italy). Dipt. di Fisica)
Item Type: Refine your search to only Report
open access

Establishment and maintenance of a coal sample bank and data base

Description: During the current reporting period a total of 139 samples (46 DOE Sample Bank samples and 93 other Penn State samples) of various sizes were distributed. Sixty-three of the samples were distributed to DOE or its contractors; 76 were distributed to other agencies. A total of 88 data printouts were distributed. In addition, seven special data requests were fulfilled by either search/sort and printout or creation of a data disk. Several preliminary requests for Sample Bank and Data Base informati… more
Date: April 19, 1989
Item Type: Refine your search to only Report
open access

Establishment and maintenance of a coal sample bank and data base. Project status report, January 9, 1989--April 8, 1989

Description: During the current reporting period a total of 139 samples (46 DOE Sample Bank samples and 93 other Penn State samples) of various sizes were distributed. Sixty-three of the samples were distributed to DOE or its contractors; 76 were distributed to other agencies. A total of 88 data printouts were distributed. In addition, seven special data requests were fulfilled by either search/sort and printout or creation of a data disk. Several preliminary requests for Sample Bank and Data Base informati… more
Date: April 19, 1989
Item Type: Refine your search to only Report
open access

Laboratory studies of the behavior of undissolved solids in both pulsed and packed column extraction systems

Description: A substantial fraction of the finely divided undissolved solid material found in nuclear fuel reprocessing dissolver-product solutions is hydrophobic and tends to ``seek`` any organic-aqueous interface existing within countercurrent liquid-liquid extraction systems. While passing through pulsed-type columns this material is swept out of the aqueous phase by the combined surface area of the tiny bubbles of dispersed phase. Because these bubbles have a net velocity towards the end of the column w… more
Date: April 18, 1989
Creator: Siemer, D. D.
Item Type: Refine your search to only Article
open access

[Studies on the interaction of blood components with ultra-smooth polymer surfaces]

Description: This report is in three parts, though each is briefly described data is provided. The three parts address (1) radioiodination of human thrombin and fibrinogen; (2) interaction of blood components with ultra- smooth polymer surfaces; and (3) initial studies of Tecoflex and treated Tecoflex cups with normal serum samples.
Date: April 17, 1989
Creator: Carlson, T. H.
Item Type: Refine your search to only Report
open access

Building 774A mini-melter restoration

Description: Large scale mechanical improvements were made on the 100th scale glass melter in building 774A following a shutdown in November, 1988. The circumstances regarding that shutdown were reported by P.M. Allen in DPST-89-345. By request, the Mechanical Development Group assumed responsibility for the work on SRL Service order DS-87042. This report describes the changes which were made, their purpose, and observations as to their effectiveness after approximately 4 weeks of operating with the improve… more
Date: April 14, 1989
Creator: Mensink, D. L.
Item Type: Refine your search to only Report
open access

Electrorefining cell evaluation

Description: Operational characteristics of the LANL electrorefining cell, a modified LANL electrorefining cell, and an advanced electrorefining cell (known as the CRAC cell) were determined. Average process yields achieved were: 75% for the LANL cell, 82% for the modified LANL cell, and 86% for the CRAC cell. All product metal from the LANL and modified LANL cells was within foundry specifications. Metal from one run in the CRAC cell exceeded foundry specifications for tantalum. The LANL and modified LANL … more
Date: April 14, 1989
Creator: Bronson, M. C. & Thomas, R. L.
Item Type: Refine your search to only Report
open access

Gravimelt Process (Molten-Caustic-Leaching). Quarterly report, January--March 1989

Description: The objective of this project is to construct and operate an integrated test circuit for the Molten-Caustic-Leaching (Gravimelt) process for desulfurization and demineralization of coal to prove process economics assumptions, deliver product coal and to test process conditions aimed at significantly lowering costs. The test circuit consists of six unit operations which together provide a continuous system for leaching coal and regenerating the reactant. These units are: (a) a kiln for reacting … more
Date: April 14, 1989
Item Type: Refine your search to only Report
open access

Magnetic switching

Description: Magnetic switching is a pulse compression technique that uses a saturable inductor (reactor) to pass pulses of energy between two capacitors. A high degree of pulse compression can be achieved in a network when several of these simple, magnetically switched circuits are connected in series. Individual inductors are designed to saturate in cascade as a pulse moves along the network. The technique is particularly useful when a single-pulse network must be very reliable or when a multi-pulse netwo… more
Date: April 14, 1989
Creator: Kirbie, H.C.
Item Type: Refine your search to only Article
open access

Relativistic klystron wakefields

Description: Monopole, dipole and quadrupole wake potentials are calculated for two cavities in a standing-wave relativistic klystron, using two independent programs, TBCI and AMOS. Reflections from model terminations which may distort long-range wakes can be mitigated either by using a very long pipe or by using absorptive materials at the pipe boundaries. 7 refs., 10 figs.
Date: April 14, 1989
Creator: Yu, D.U.L. (Duly Consultants, Rancho Palos Verdes, CA (USA)); Craig, G.D. & DeFord, J.F. (Lawrence Livermore National Lab., CA (USA))
Item Type: Refine your search to only Article
open access

Switched power workshop: Power supply working group

Description: The power supply working group was assigned the problem of pulse charging the 3-MeV gun. The gun is a radial line structure that has two charging configurations: a single ring charged to 500 kV or nine rings charged from 100 to 200 kV. In either configuration, the pulsed source must rapidly charge the structure's ring(s) before breakdown can begin. The issues encountered in charging the structure can be divided into two categories. First, the charging system must be well matched to the gun stru… more
Date: April 14, 1989
Creator: Haseroth, H.; Hopkins, D.; Ikezi, H.; Kirbie, H.C.; Lincke, E. & Wilson, M.
Item Type: Refine your search to only Article
open access

Photoinitiated electron transfer in multichromophoric species: Synthetic tetrads and pentads

Description: This research project involves the design, synthesis and study of molecules which mimic many of the important aspects of photosynthetic electron and energy transfer. Specifically, the molecules are designed to mimic the following aspects of natural photosynthetic multistep electron transfer: electron donation from a tetrapyrrole excited singlet state, electron transfer between tetrapyrroles, electron transfer from tetrapyrroles to quinones, and electron transfer between quinones with different … more
Date: April 12, 1989
Item Type: Refine your search to only Report
Back to Top of Screen