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Biosynthesis of plant plasmamembrane polypeptides
None
Date:
January 1, 1992
Creator:
Lamb, Christopher J.
System:
The UNT Digital Library
Boiling Heat Transfer of Refrigerant R-113 in a Small-Diameter, Horizontal Tube
Results of a study of boiling heat transfer from refrigerant R-113 in a small-diameter (2.92-mm) tube are reported. Local heat transfer coefficients over a range of heat fluxes, mass fluxes, and equilibrium mass qualities were measured. The measured coefficients were used to evaluate eight different heat transfer correlations, some of which have been developed specifically for refrigerants. High heat fluxes and low flow rates are inherent in small channels, and this combination results in high boiling numbers. The high boiling number of the collected data shows that the nucleation mechanism was dominant. As a result, the two-phase correlations that predicted this dominance also predicted the data best if they also properly modeled the physical parameters. The correlations of Lazarek and Black and of Shah, as modified in this study, predicted the data very well. It is also shown that a simple form, suggested by Stephan and Abdelsalam for nucleate boiling, correlates the data equally well. This study is part of a research program in multiphase flow and heat transfer, with the overall objective of developing validated design correlations and predictive methods that will facilitate the design and optimization of compact heat exchangers for use with environmentally acceptable alternatives for chlorofluorocarbon …
Date:
January 1992
Creator:
Wambsganss, M. W.; France, D. M.; Jendrzejczyk, J. A. & Tran, T. N.
System:
The UNT Digital Library
Boiling heat transfer of refrigerant R-113 in a small-diameter, horizontal tube
Results of a study of boiling heat transfer from refrigerant R-113 in a small-diameter (2.92-mm) tube are reported. Local heat transfer coefficients over a range of heat fluxes, mass fluxes, and equilibrium mass qualities were measured. The measured coefficients were used to evaluate eight different heat transfer correlations, some of which have been developed specifically for refrigerants. High heat fluxes and low flow rates are inherent in small channels, and this combination results in high boiling numbers. The high boiling number of the collected data shows that the nucleation mechanism was dominant. As a result, the two-phase correlations that predicted this dominance also predicted the data best if they also properly modeled the physical parameters. The correlations of Lazarek and Black and of Shah, as modified in this study, predicted the data very well. It is also shown that a simple form, suggested by Stephan and Abdelsalam for nucleate boiling, correlates the data equally well. This study is part of a research program in multiphase flow and heat transfer, with the overall objective of developing validated design correlations and predictive methods that will facilitate the design and optimization of compact heat exchangers for use with environmentally acceptable alternatives for chlorofluorocarbon …
Date:
January 1, 1992
Creator:
Wambsganss, M. W.; Jendrzejczyk, J. A.; Tran, T. N. & France, D. M.
System:
The UNT Digital Library
Boiling heat transfer of refrigerant R-113 in a small-diameter, horizontal tube
Results of a study of boiling heat transfer from refrigerant R-113 in a small-diameter (2.92-mm) tube are reported. Local heat transfer coefficients over a range of heat fluxes, mass fluxes, and equilibrium mass qualities were measured. The measured coefficients were used to evaluate eight different heat transfer correlations, some of which have been developed specifically for refrigerants. High heat fluxes and low flow rates are inherent in small channels, and this combination results in high boiling numbers. The high boiling number of the collected data shows that the nucleation mechanism was dominant. As a result, the two-phase correlations that predicted this dominance also predicted the data best if they also properly modeled the physical parameters. The correlations of Lazarek and Black and of Shah, as modified in this study, predicted the data very well. It is also shown that a simple form, suggested by Stephan and Abdelsalam for nucleate boiling, correlates the data equally well. This study is part of a research program in multiphase flow and heat transfer, with the overall objective of developing validated design correlations and predictive methods that will facilitate the design and optimization of compact heat exchangers for use with environmentally acceptable alternatives for chlorofluorocarbon …
Date:
January 1, 1992
Creator:
Wambsganss, M. W.; Jendrzejczyk, J. A.; Tran, T. N. & France, D. M.
System:
The UNT Digital Library
Bonneville Power Administration 1991 Annual Report.
Congress enacted the Bonneville Project Act in 1937, creating the Bonneville Power Administration to market and transmit the power produced by Bonneville Dam on the Columbia River. Since then, Congress has directed BPA to sell at wholesale the power produced at a total of 30 Federal dams in the Pacific Northwest, and to acquire conservation and generating resources sufficient to meet the needs of BPA`s customer utilities. The dams and the electrical system are known as the Federal Columbia River Power System. Bonneville sells wholesale power to public and private utilities, rural cooperatives, large industries, and Federal agencies. BPA also sells or exchanges power with utilities in California. BPA uses revenues from the sale of power and transmission services to recover its own expenses, to repay the Federal investment in the power system, and to pay for the resources it has acquired. BPA pays for operation and maintenance expenses at the Federal dams and at non-Federal power plants. It also pays for irrigation benefits of Federal projects allocated to power to repay, and for fish and wildlife projects which offset damage to these resources by the Federal hydropower system. This document is the 1991 statement of budget, financial statement, cash …
Date:
January 1, 1992
Creator:
United States. Bonneville Power Administration.
System:
The UNT Digital Library
Bonneville Power Administration Budget for Fiscal Year 1993.
This report contains the FY 1993 Congressional budget for the Bonneville Power Administration. The overview includes tables and summary statements of (1) Current services -- Program and financing; (2) Status of borrowing and cash flow; (3) Impact of repayment proposal on Federal Columbia River Power System; (4) Summary of changes (Capital commitments and borrowing authority); as well as (5) Budget preface and program overview; (6) System statistics; (7) BPA transmission system map; and (8) Financial performance indicators. These materials are in narrative and graph format. Major programs are discussed. Operating expenses for key programs are given for FY 1991, FY 1992, and FY 1993. Budget schedules and supplementary material are also included.
Date:
January 1, 1992
Creator:
United States. Bonneville Power Administration.
System:
The UNT Digital Library
Booster Applications Facility report: Addendum
This proposal is based on the conceptual design and feasibility study (BNL report {number sign}52291) which was performed at the request, and with the support of NASA's Life Sciences Division. The BNL Booster, which is now being successfully commissioned with protons, will undergo similar tests and initial heavy-ion operation in early 1992. This accelerator is a fast cycling synchrotron, and therefore capable of sequentially delivering independent alternate pulses of different ions for two applications. Thus, after a pulse is injected in the Alternating Gradient Synchrotron (AGS) for further acceleration, there will be ample time to deliver a pulse of a different ion to a proposed Booster Applications Facility (BAF) before the next AGS pulse is required. Cost effective BAF operation and reliable beam delivery would result. This is guaranteed by the need to maintain all the systems in good operating condition for the main mission of the facility, which is the injection of AGS, and eventually of the Relativistic Heavy Ion Collider (RHIC). A large variety of high-Z high-energy (HZE) particles can be produced, ranging from maximum energies of 1.5 GeV/AMU for ions lighter than iron, to {approximately}1.25 GeV/AMU for iron, and to {approximately}350 MeV/AMU for gold.
Date:
January 1, 1992
Creator:
Thieberger, P. (ed.)
System:
The UNT Digital Library
Booster Applications Facility report: Addendum
This proposal is based on the conceptual design and feasibility study (BNL report {number_sign}52291) which was performed at the request, and with the support of NASA`s Life Sciences Division. The BNL Booster, which is now being successfully commissioned with protons, will undergo similar tests and initial heavy-ion operation in early 1992. This accelerator is a fast cycling synchrotron, and therefore capable of sequentially delivering independent alternate pulses of different ions for two applications. Thus, after a pulse is injected in the Alternating Gradient Synchrotron (AGS) for further acceleration, there will be ample time to deliver a pulse of a different ion to a proposed Booster Applications Facility (BAF) before the next AGS pulse is required. Cost effective BAF operation and reliable beam delivery would result. This is guaranteed by the need to maintain all the systems in good operating condition for the main mission of the facility, which is the injection of AGS, and eventually of the Relativistic Heavy Ion Collider (RHIC). A large variety of high-Z high-energy (HZE) particles can be produced, ranging from maximum energies of 1.5 GeV/AMU for ions lighter than iron, to {approximately}1.25 GeV/AMU for iron, and to {approximately}350 MeV/AMU for gold.
Date:
January 1, 1992
Creator:
Thieberger, P.
System:
The UNT Digital Library
Brookhaven highlights
This publication provides a broad overview of the research programs and efforts being conducted, built, designed, and planned at Brookhaven National Laboratory. This work covers a broad range of scientific disciplines. Major facilities include the Alternating Gradient Synchrotron (AGS), with its newly completed booster, the National Synchrotron Light Source (NSLS), the High Flux Beam Reactor (HFBR), and the RHIC, which is under construction. Departments within the laboratory include the AGS department, accelerator development, physics, chemistry, biology, NSLS, medical, nuclear energy, and interdepartmental research efforts. Research ranges from the pure sciences, in nuclear physics and high energy physics as one example, to environmental work in applied science to study climatic effects, from efforts in biology which are a component of the human genome project to the study, production, and characterization of new materials. The paper provides an overview of the laboratory operations during 1992, including staffing, research, honors, funding, and general laboratory plans for the future.
Date:
January 1, 1992
Creator:
Rowe, M.S.; Cohen, A.; Greenberg, D. & Seubert, L. (eds.)
System:
The UNT Digital Library
Brookhaven National Laboratory site environmental report for calendar year 1990
Brookhaven National Laboratory (BNL) carries out basic and applied research in the following fields: high-energy nuclear and solid state physics; fundamental material and structure properties and the interactions of matter; nuclear medicine, biomedical and environmental sciences; and selected energy technologies. In conducting these research activities, it is Laboratory policy to protect the health and safety of employees and the public, and to minimize the impact of BNL operations on the environment. This document is the BNL environmental report for the calendar year 1990 for the safety and Environmental Protection division and corners topics on effluents, surveillance, regulations, assessments, and compliance.
Date:
January 1, 1992
Creator:
Miltenberger, R. P.; Royce, B. A. & Naidu, J. R.
System:
The UNT Digital Library
Brookhaven National Laboratory Site Environmental Report for Calendar Year 1990
Brookhaven National Laboratory (BNL) carries out basic and applied research in the following fields: high-energy nuclear and solid state physics; fundamental material and structure properties and the interactions of matter; nuclear medicine, biomedical and environmental sciences; and selected energy technologies. In conducting these research activities, it is Laboratory policy to protect the health and safety of employees and the public, and to minimize the impact of BNL operations on the environment. This document is the BNL environmental report for the calendar year 1990 for the safety and Environmental Protection division and corners topics on effluents, surveillance, regulations, assessments, and compliance.
Date:
January 1, 1992
Creator:
Miltenberger, R. P.; Royce, B. A. & Naidu, J. R.
System:
The UNT Digital Library
[Building and testing of Pickard Line-up Boom]
The Packard Line-up Boom is a device for controlling the placing together of the ends of two sections of pipe for clamping and welding. Consistently better weld quality is possible because the optimum weld space is achieved and held constant throughout every stringer bead, regardless of the welding method. With the use of the Pickard Line-Up Boom, there will be a minimum of pipe movement while the stringer bead is being run. Since the welder can rely on conditions being the same throughout the weld, he can regulate the weld to eliminate backwelding almost entirely. During the grant period and with the assistance of DOE grant funds, Pickard Line-up Boom Associates (PLUBA) successfully completed Task 1, construction of the Packard Boom. PLUBA contracted with Sawyer Manufacturing Company (1031 North Columbia Place, Tulsa, Oklahoma) to construct the new boom. After completion of the new boom by Sawyer, the boom was successfully tested by PLUBA, thereafter PLUBA attempted to obtain lease agreements with pipeline contractors (Tasks 2 and 3). Toward the end of the project period, PLUBA entered into a license/marketing agreement with Sabre International with. the objective of first securing contracts outside of the United States. Once this is achieved and …
Date:
January 1, 1992
Creator:
unknown
System:
The UNT Digital Library
The calculation of surface orbital energies for specific types of active sites on dispersed metal catalysts
An angular overlap calculation has been used to determine the s, p, and d orbital energy levels of the different types of surface sites present on dispersed metal catalysts. These data can permit a Frontier Molecular Orbital treatment of specific site activities as long as the surface orbital availability for overlap with adsorbed substrates is considered along with its energy value and symmetry.
Date:
January 1, 1992
Creator:
Augustine, R.L.; Lahanas, K.M. & Cole, F.
System:
The UNT Digital Library
Calmodulin immunolocalization to cortical microtubules is calcium independent
Calcium affects the stability of cortical microtubules (MTs) in lysed protoplasts. This calmodulin (CaM)-mediated interaction may provide a mechanism that serves to integrate cellular behavior with MT function. To test the hypothesis that CaM associates with these MTs, monoclonal antibodies were produced against CaM, and one (designated mAb1D10), was selected for its suitability as an immunocytochemical reagent. It is shown that CaM associates with the cortical Mats of cultured carrot (Daucus carota L.) and tobacco (Nicotiana tobacum L.) cells. Inasmuch as CaM interacts with calcium and affects the behavior of these Mats, we hypothesized that calcium would alter this association. To test this, protoplasts containing taxol-stabilized Mats were lysed in the presence of various concentrations of calcium and examined for the association of Cam with cortical Mats. At 1 [mu]M calcium, many protoplasts did not have CaM in association with the cortical Mats, while at 3.6 [mu]M calcium, this association was completely abolished. The results are discussed in terms of a model in which CaM associates with Mats via two types of interactions; one calcium dependent and one independent.
Date:
January 1, 1992
Creator:
Fisher, D.D. & Cyr, R.J.
System:
The UNT Digital Library
Capillary liquid chromatography using laser-based and mass spectrometric detection. [Capillary zone electrophoresis (CZE); micellar electrokinetic capillary kchromatography (MECC)]
In the years following the 1986 seminal paper (J. Chromatogr. Sci., 24, 347-352) describing modern capillary zone electrophoresis (CZE), the prominence of capillary electrokinetic separation techniques has grown. A related electrochromatographic technique is micellar electrokinetic capillary chromatography (MECC). This report presents a brief synopsis of research efforts during the current 3-year period. In addition to a description of analytical separations-based research, results of efforts to develop and expand spectrometric detection for the techniques is reviewed. Laser fluorometric detection schemes have been successfully advanced. Mass spectrometric research was less fruitful, largely owing to personnel limitations. A regenerable fiber optic sensor was developed that can be used to remotely monitor chemical carcinogens, etc. (DLC)
Date:
January 1, 1992
Creator:
Sepaniak, M.J. & Cook, K.D.
System:
The UNT Digital Library
Carbon dioxide and the stomatal control of water balance and photosynthesis in higher plants
Research continued into the investigation of the effects of carbon dioxide on stomatal control of water balance and photosynthesis in higher plants. Topics discussed this period include a method of isolating a sufficient number of guard cell chloroplasts for biochemical studies by mechanical isolation of epidermal peels; the measurement of stomatal apertures with a digital image analysis system; development of a high performance liquid chromatography method for quantification of metabolites in guard cells; and genetic control of stomatal movements in Pima cotton. (CBS)
Date:
January 1, 1992
Creator:
unknown
System:
The UNT Digital Library
Case studies of thermal energy storage (TES) systems: Evaluation and verification of system performance
We have developed two case studies to review and analyze energy performance of thermal energy storage CMS systems in commercial buildings. Our case studies considered two partial ice storage systems in Northern California. For each case, we compiled historical data on TES design, installation, and operation. This information was further enhanced by data obtained through interviews with the building owners and operators. The performance and historical data of the TES systems and their components were grouped into issues related to design, installation, operation, and maintenance of the systems. Our analysis indicated that (1) almost all problems related to the operation of TES and non-TES systems could be traced back to the design of the system, and (2) the identified problems were not unique to the TES systems. There were as many original problems with conventional'' HVAC systems and components as with TES systems. Judging from the problems related to non-TES components identified in these two case studies, it is reasonable to conclude that conventional systems have as many problems as TES systems, but a failure, in a TES system may have a more dramatic impact on thermal comfort and electricity charges. The objective of the designers of the TES systems …
Date:
January 1, 1992
Creator:
Akbari, H. & Sezgen, O.
System:
The UNT Digital Library
Case studies of thermal energy storage (TES) systems: Evaluation and verification of system performance. Final report
We have developed two case studies to review and analyze energy performance of thermal energy storage CMS systems in commercial buildings. Our case studies considered two partial ice storage systems in Northern California. For each case, we compiled historical data on TES design, installation, and operation. This information was further enhanced by data obtained through interviews with the building owners and operators. The performance and historical data of the TES systems and their components were grouped into issues related to design, installation, operation, and maintenance of the systems. Our analysis indicated that (1) almost all problems related to the operation of TES and non-TES systems could be traced back to the design of the system, and (2) the identified problems were not unique to the TES systems. There were as many original problems with ``conventional`` HVAC systems and components as with TES systems. Judging from the problems related to non-TES components identified in these two case studies, it is reasonable to conclude that conventional systems have as many problems as TES systems, but a failure, in a TES system may have a more dramatic impact on thermal comfort and electricity charges. The objective of the designers of the TES systems …
Date:
January 1, 1992
Creator:
Akbari, H. & Sezgen, O.
System:
The UNT Digital Library
Catalysis and co-catalysis of bond cleavages in coal and coal analogs
The catalytic efficiency of 2-pyridone and 4-pyridone (tautomers of 2-hydroxy and 4-hydroxypyridine) for transfer hydrogenolysis of dinaphthyl ether in tetralin at 450 C was investigated. The effectiveness of 2-pyridone dropped when the reaction time was increased, suggesting that the catalyst is destroyed. Reaction of a compound with bromine in CCl[sub 4] yielded a rearrangement product with a minor amount of the cyclization product; in acetonitrile, only the rearrangement product is obtained.
Date:
January 1, 1992
Creator:
Miller, B.
System:
The UNT Digital Library
Catalysis and co-catalysis of bond cleavages in coal and coal analogs. [N,N-Dimethylaniline]
Catalytic hydrogenolysis and thermal fragmentation of coal-related compounds are covered in this report. Data are tabulated for the following processes: (1) Transfer Hydrogenolysis in Tetralin at 450{degrees}C in Stainless Steel Reactors; (2) Effects of Diphenylamine on Fragmentation of 1,1-Dibenzyl-1,4-dihydronaphthalene at 150{degrees}C; (3) Effect of Diphenylamine on Rate of Fragmentation of 1,1-Di-p-tolyl-1,4-dihydronaphthalene at 150{degrees}C; (4) Fragmentation of 1,1-Di-(4-chlorobenzyl)-1,4-dihydronaphthalene at 150{degrees}C. (VC)
Date:
January 1, 1992
Creator:
Miller, B.
System:
The UNT Digital Library
Catalytic carbon membranes for hydrogen production
Commercial carbon composite microfiltration membranes may be modified for gas separation applications by providing a gas separation layer with pores in the 1- to 10-nm range. Several organic polymeric precursors and techniques for depositing a suitable layer were investigated in this project. The in situ polymerization technique was found to be the most promising, and pure component permeation tests with membrane samples prepared with this technique indicated Knudsen diffusion behavior. The gas separation factors obtained by mixed-gas permeation tests were found to depend strongly on gas temperature and pressure indicating significant viscous flow at high-pressure conditions. The modified membranes were used to carry out simultaneous water gas shift reaction and product hydrogen separation. These tests indicated increasing CO conversions with increasing hydrogen separation. A simple process model was developed to simulate a catalytic membrane reactor. A number of simulations were carried out to identify operating conditions leading to product hydrogen concentrations over 90 percent. (VC)
Date:
January 1, 1992
Creator:
Damle, A.S. & Gangwal, S.K.
System:
The UNT Digital Library
Catalytic carbon membranes for hydrogen production. Final report
Commercial carbon composite microfiltration membranes may be modified for gas separation applications by providing a gas separation layer with pores in the 1- to 10-nm range. Several organic polymeric precursors and techniques for depositing a suitable layer were investigated in this project. The in situ polymerization technique was found to be the most promising, and pure component permeation tests with membrane samples prepared with this technique indicated Knudsen diffusion behavior. The gas separation factors obtained by mixed-gas permeation tests were found to depend strongly on gas temperature and pressure indicating significant viscous flow at high-pressure conditions. The modified membranes were used to carry out simultaneous water gas shift reaction and product hydrogen separation. These tests indicated increasing CO conversions with increasing hydrogen separation. A simple process model was developed to simulate a catalytic membrane reactor. A number of simulations were carried out to identify operating conditions leading to product hydrogen concentrations over 90 percent. (VC)
Date:
January 1, 1992
Creator:
Damle, A. S. & Gangwal, S. K.
System:
The UNT Digital Library
Catalytic oxidation of hydrocarbons by dinuclear iron complexes
Our efforts during the past eight months were directed towards characterizing synthetic complexes that model the electronic and reactivity properties of the active site of methane monooxygenase (MMO), a metalloenzyme found in methanotrophic bacteria responsible for the biological oxidation of methane to methanol. We have investigated the structural/electronic and reactivity properties of a series of dinuclear model complexes that can function as oxygen atom transfer catalysts. In particular, our studies focused on [Fe[sup 2+][sub 2](H[sub 2]Hbab)[sub 2](N-MeIm)[sub 2]], its DMF solvated form, [Fe[sup 2+][sub 2](H[sub 2]Hbab)[sub 2](DMF)[sub 2](MeIm)], and the mixed valent species [Fe[sup 2+]Fe[sup 3+](H[sub 2]Hbab)[sub 2](DMF)[sub 4]][sup +], (H[sub 4]Hbab = 1,2-bis(2-hydroxybenzamido) benzene). We have also examined [Fe[sup 3+][sub 2](H[sub 2]Hbab)[sub 2](DMF)[sub 4]][sup 2+], [Fe[sup 3+][sub 2](H[sub 2]Hbab)[sub 2](OMe)[sub 2]], and [mu]-oxo-[Fe[sup 3+][sub 2](H[sub 2]Hbab)[sub 2](DMF)[sub 2]], which are unable to act as oxygen atom transfer catalysts.
Date:
January 1, 1992
Creator:
Caradonna, J. P.
System:
The UNT Digital Library
Catalytic oxidation of secondary alcohols
The dioxygen oxidation of alcohols over platinum catalysts has been known for a long time. While of potential importance in synthetic procedures, this process has never found extensive use except in carbohydrate oxidations. Some reasons for this is the fact that this reaction only appears to work well in an aqueous medium in the presence of rather large amounts of a Pt black catalyst. Results obtained here show that supported Pt catalysts can be used to promote this oxidation in organic solvents provided a small amount of water is added to the reaction medium. It was also estabilished that the reaction takes place on the more coordinately unsaturated corner atoms on the Pt surface.
Date:
January 1, 1992
Creator:
Augustine, Robert L. & Doyle, Lisa K.
System:
The UNT Digital Library