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Sample records for pumpherston retort

  1. Cyclone oil shale retorting concept. [Use it all retorting process

    Energy Technology Data Exchange (ETDEWEB)

    Harak, A.E.; Little, W.E.; Faulders, C.R.

    1984-04-01

    A new concept for above-ground retorting of oil shale was disclosed by A.E. Harak in US Patent No. 4,340,463, dated July 20, 1982, and assigned to the US Department of Energy. This patent titled System for Utilizing Oil Shale Fines, describes a process wherein oil shale fines of one-half inch diameter and less are pyrolyzed in an entrained-flow reactor using hot gas from a cyclone combustor. Spent shale and supplemental fuel are burned at slagging conditions in this combustor. Because of fines utilization, the designation Use It All Retorting Process (UIARP) has been adopted. A preliminary process engineering design of the UIARP, analytical tests on six samples of raw oil shale, and a preliminary technical and economic evaluation of the process were performed. The results of these investigations are summarized in this report. The patent description is included. It was concluded that such changes as deleting air preheating in the slag quench and replacing the condenser with a quench-oil scrubber are recognized as being essential. The addition of an entrained flow raw shale preheater ahead of the cyclone retort is probably required, but final acceptance is felt to be contingent on some verification that adequate reaction time cannot be obtained with only the cyclone, or possibly some other twin-cyclone configuration. Sufficient raw shale preheating could probably be done more simply in another manner, perhaps in a screw conveyor shale transporting system. Results of the technical and economic evaluations of Jacobs Engineering indicate that further investigation of the UIARP is definitely worthwhile. The projected capital and operating costs are competitive with costs of other processes as long as electric power generation and sales are part of the processing facility.

  2. Combat Ration Network for Technology Implementation. Retort Racks for Polymeric Trays in 1400 Style Spray Retorts

    Science.gov (United States)

    2003-05-01

    trays backup plate & support pillars to allow 35" shut height as required by most 3500 ton molding machines dedicated mounting rails for installation...hr. At this time, Stegner had modified all their pallet bottom plates to support the rack in all load bearing points and in addition, Wornick send two...COMBAT RATION NETWORK FOR TECHNOLOGY IMPLEMENTATION Retort Racks for Polymeric Trays in 1400 Style Spray Retorts Final Technical Report STP 2010

  3. Double Retort System for Materials Compatibility Testing

    Energy Technology Data Exchange (ETDEWEB)

    V. Munne; EV Carelli

    2006-02-23

    With Naval Reactors (NR) approval of the Naval Reactors Prime Contractor Team (NRPCT) recommendation to develop a gas cooled reactor directly coupled to a Brayton power conversion system as the Space Nuclear Power Plant (SNPP) for Project Prometheus (References a and b) there was a need to investigate compatibility between the various materials to be used throughout the SNPP. Of particular interest was the transport of interstitial impurities from the nickel-base superalloys, which were leading candidates for most of the piping and turbine components to the refractory metal alloys planned for use in the reactor core. This kind of contamination has the potential to affect the lifetime of the core materials. This letter provides technical information regarding the assembly and operation of a double retort materials compatibility testing system and initial experimental results. The use of a double retort system to test materials compatibility through the transfer of impurities from a source to a sink material is described here. The system has independent temperature control for both materials and is far less complex than closed loops. The system is described in detail and the results of three experiments are presented.

  4. Morphology of retorted oil shale particles

    Energy Technology Data Exchange (ETDEWEB)

    Adams, D.C.; Mahajan, O.P.

    The formation of two distinct coked particle morphotypes, namely exfoliated and peripheral, during oil shale retorting and their implications toward the coking mechanism are discussed. Rapid heating causes swelling, exfoliation, and formation of a matrix of veinlets and cracks; these changes lead to uniform coking within the particle body. In contrast, slow heating produces the peripheral morphotype with a low coke density at the center and a high coke density at the periphery. The difference in the coking morphology of the two particle types has been explained on the basis of kerogen pyrolysis kinetics. Of the two morphotypes, peripheral coke makes the particles stronger and more resistant to size attrition. In addition to the formation of coke in the particle body of the two morphotypes, coke is also formed on the outer surface of both the particle types. It has been concluded that more coke is produced from the secondary decomposition reactions than directly from the kerogen itself. 25 references, 8 figures.

  5. Effects of retorting factors on combustion properties of shale char. 3. Distribution of residual organic matters.

    Science.gov (United States)

    Han, Xiangxin; Jiang, Xiumin; Cui, Zhigang; Liu, Jianguo; Yan, Junwei

    2010-03-15

    Shale char, formed in retort furnaces of oil shale, is classified as a dangerous waste containing several toxic compounds. In order to retort oil shale to produce shale oil as well as treat shale char efficiently and in an environmentally friendly way, a novel kind of comprehensive utilization system was developed to use oil shale for shale oil production, electricity generation (shale char fired) and the extensive application of oil shale ash. For exploring the combustion properties of shale char further, in this paper organic matters within shale chars obtained under different retorting conditions were extracted and identified using a gas chromatography-mass spectrometry (GC-MS) method. Subsequently, the effects of retorting factors, including retorting temperature, residence time, particle size and heating rate, were analyzed in detail. As a result, a retorting condition with a retorting temperature of 460-490 degrees C, residence time of circulating fluidized bed technology with fractional combustion.

  6. Assessment of TAMU Rack Material in Poly Tray Racks using Spray Retort

    Science.gov (United States)

    2009-07-01

    necessary perforated plates for their production retort pallets to support the racks in all the load bearing points, temperature distribution were...Characterization New Rack – Loaded with Polymeric Half Steam Table Tray – One Pallet Retorted @ 260 F for 60 min (2 times) – Test for Rack Sag – Drop Test – 2...dimension and weight. Rutgers will supply adequate number of polymeric trays for this test. A single pallet load will be retorted at 260 F for 60

  7. Oil shale project run summary for small retort Run S-10

    Energy Technology Data Exchange (ETDEWEB)

    Ackerman, F.J.; Sandholtz, W.A.; Raley, J.H.; Laswell, B.H. (eds.)

    1978-06-01

    A combustion run using sidewall heaters to control heat loss and computer control to set heater power were conducted to study the effectiveness of the heater control system, compare results with a one-dimensional retort model when radial heat loss is not significant, and determine effects of recycling off-gas to the retort (by comparison with future runs). It is concluded that adequate simulation of in-situ processing in laboratory retorts requires control of heat losses. (JRD)

  8. Ignition technique for an in situ oil shale retort

    Science.gov (United States)

    Cha, Chang Y.

    1983-01-01

    A generally flat combustion zone is formed across the entire horizontal cross-section of a fragmented permeable mass of formation particles formed in an in situ oil shale retort. The flat combustion zone is formed by either sequentially igniting regions of the surface of the fragmented permeable mass at successively lower elevations or by igniting the entire surface of the fragmented permeable mass and controlling the rate of advance of various portions of the combustion zone.

  9. 30 CFR 57.22401 - Underground retorts (I-A and I-B mines).

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Underground retorts (I-A and I-B mines). 57... METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Safety Standards for Methane in Metal and Nonmetal Mines Underground Retorts § 57.22401...

  10. Source characterization studies at the Paraho semiworks oil shale retort. [Redistribution of trace and major elements

    Energy Technology Data Exchange (ETDEWEB)

    Fruchter, J.S.; Wilkerson, C.L.; Evans, J.C.; Sanders, R.W.; Abel, K.W.

    1979-05-01

    In order to determine the redistribution of trace and major elements and species during aboveground oil shale retorting, a comprehensive program was carried out for the sampling and analysis of feedstock, products, effluents, and ambient particulates from the Paraho Semiworks Retort. Samples were obtained during two periods in 1977 when the retort was operating in the direct mode. The data were used to construct mass balances for 31 trace and major elements in various effluents, including the offgas. The computed mass balances indicated that approx. 1% or greater fractions of the As, Co, Hg, N, Ni, S, and Se were released during retorting and redistributed to the product oil, retort water, or product offgas. The fraction released for these seven elements ranged from approx. 1% for Co and Ni to 50 to 60% for Hg and N. Approximately 20% of the S and 5% each of the As and Se were released. Ambient aerosols were found to be elevated near the retorting facility and associated crushing and retorted shale disposal sites. Approximately 50% of these particles were in the respirable range (< 5 ..mu..m). The elevated dust loadings are presented very local, as indicated by relatively low aerosol loadings at background sites 100 to 200 m away. State-of-the-art dust control measures were not employed. 15 figures, 19 tables.

  11. Oil shale project: run summary for small retort Run S-11

    Energy Technology Data Exchange (ETDEWEB)

    Sandholtz, W.A.; Ackerman, F.J.; Bierman, A.; Kaehler, M.; Raley, J.; Laswell, B.H.; Tripp, L.J. (eds.)

    1978-06-01

    Results are reported on retort run S-11 conducted to observe the effects of combustion retorting with undiluted air at relatively rapid burn (retorting) rates and to provide a base case for retorting small uniform shale (Anvil Points master batch -2.5 +- 1.3 cm) with undiluted air. It was found that a 0.6 m/sup 3//m/sup 2//minute superficial gas velocity gave an average rate of propagation of the combustion peak of about 2.7 m/day and an average maximum temperature on the centerline of the rubble bed of 1003/sup 0/C. Oil yield was 93 percent of Fischer assay. For small uniform shale particles (-2.5 + 1.3 cm) it is concluded that only small losses in yield (92 percent vs 96 percent in Run S-10) result from high retorting rates. Maximum temperature considerations preclude going to higher rates with undiluted air. Without diluent, a larger air flux would give excessive bed temperatures causing rock melting and potential closure to gas flow. In experimental retorts, another problem of excessive temperatures is potential damage to metal walls and in-situ sensors. No advantage is seen to using recycled off-gas as a combustion gas diluent. Inert diluents (e.g. nitrogen or steam) may be necessary for process control, but the fuel values in the off-gas should best be used for energy recovery rather than burned in the retort during recycle. Another consideration from model calculations is that the use of recycle gas containing fuel components retards the retorting rate and so is undesirable. No further recycle experiments are planned as the results of this run proved satisfactory.

  12. An Economic and Ecologic Comparison of the Nuclear Stimulation of Natural Gas Fields with Retorting of Oil Shale

    Science.gov (United States)

    1975-06-06

    a completely different system of retorting. Unlike the gas-combustion retorts, the TOSCO II is a rotary type retort that uses hot ceramic balls to... kilns and smelters are designed to do the nonvolatile solid such as iron, copper, or lime. This is the mining technique envisioned in most shale...burned. Such heating also con- verts -ome of the other minerals to their oxide forms and the resulting ash has be»n described as a low grade of cement

  13. Investigation of the geokinetics horizontal in situ oil shale retorting process. Quarterly report, April, May, June 1980

    Energy Technology Data Exchange (ETDEWEB)

    Hutchinson, D.L.

    1980-08-01

    The Retort No. 18 burn was terminated on May 11, 1980. A total of 5547 barrels of shale oil or 46 percent of in-place resource was recovered from the retort. The EPA-DOE/LETC post-burn core sampling program is underway on Retort No. 16. Eleven core holes (of 18 planned) have been completed to date. Preliminary results indicate excellent core recovery has been achieved. Recovery of 702 ft of core was accomplished. The Prevention of Significant Deterioration (PSD) permit application was submitted to the EPA regional office in Denver for review by EPA and Utah air quality officials. The application for an Underground Injection Control (UIC) permit to authorize GKI to inject retort wastewater into the Mesa Verde Formation is being processed by the State of Utah. A hearing before the Board of Oil, Gas and Mining is scheduled in Salt Lake City, Utah, for July 22, 1980. Re-entry drilling on Retort No. 24 is progressing and placement of surface equipment is underway. Retort No. 25 blasthole drilling was completed and blast preparations are ongoing. Retort No. 25 will be blasted on July 18, 1980. The retort will be similar to Retort No. 24, with improvements in blasthole loading and detonation. US Patent No. 4,205,610 was assigned to GKI for a shale oil recovery process. Rocky Mountain Energy Company (RME) is evaluating oil shale holdings in Wyoming for application of the GKI process there.

  14. Investigation of the geokinetics horizontal in situ oil shale retorting process. Quarterly report, October, November, December 1983

    Energy Technology Data Exchange (ETDEWEB)

    Henderson, K.B.

    1984-03-01

    Retort No. 27 was ignited on August 11, 1983 and by December 31 had completed 139 days of operation and produced 11,420 barrels of oil. Retort No. 28 was ignited on October 18, 1983 and on December 31 had completed 74 days of operation and produced 5,285 barrels of oil. The off-gas processing plants for the two retorts was completed and put through a shakedown run. Concentration levels of H/sub 2/S and NH/sub 3/ in the retort off gas did not warrant plant operation in the fourth quarter. Environmental studies are reported.

  15. Evaluation of oil shale from Eastern Canada by retorting and by concentration of a kerogen-rich fraction. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Brown, G.W.; Abbott, D.

    1981-12-16

    An apparatus was developed for testing the retorting behaviour of oil shales under pressures up to 500 psi hydrogen and 700/sup 0/C. Equipment was also constructed and brought into service for the determination of oil yields by the Fischer assay method. Six samples of Albert shale of varying oil content (<10 to 40-50 gals/ton) were tested by the Fischer method and by hydrogen retorting to determine yields of liquid distillate under different conditions of retorting. The Fischer assays gave oil yields of 2.9 to 47.5 gals/ton which corresponded to carbon conversion of 50.5 to 87.8 per cent. The hydrogen retorting tests at 700/sup 0/C and 500/sup 0/C gave carbon conversion rates of 53 to 87 per cent which are comparable to that for the Fischer retorting. Retorting at 500/sup 0/C gave oil yields similar to the Fischer assay but at 700/sup 0/C oil yields were reduced, 4 to 30 gals/ton, although gas yields increased. In the retorting tests performed, the use of hydrogen at 500 psi did not increase yields. More work is needed to understand the retorting behaviour of New Brunswick and other Canadian oil shales. Retorting tests for resource assessment purposes are also needed. These should be coupled to determining the rate of carbon conversion and hence the effectiveness of the retorting technique. Petrographic, chemical and thermogravimetric analyses of the oil shales were undertaken to characterize the materials for retorting tests. The second part of the project involved producing a kerogen concentrate by standard beneficiation methods, spherical agglomeration, gravity methods and by flotation. Only gravity separation showed promise of being a viable industrial process. Fine grinding and gravity separation gave high concetrations up to 70 gals/ton but yields were low. 11 figs., 13 tabs.

  16. Water Usage for In-Situ Oil Shale Retorting – A Systems Dynamics Model

    Energy Technology Data Exchange (ETDEWEB)

    Earl D. Mattson; Larry Hull; Kara Cafferty

    2012-12-01

    A system dynamic model was construction to evaluate the water balance for in-situ oil shale conversion. The model is based on a systems dynamics approach and uses the Powersim Studio 9™ software package. Three phases of an insitu retort were consider; a construction phase primarily accounts for water needed for drilling and water produced during dewatering, an operation phase includes the production of water from the retorting process, and a remediation phase water to remove heat and solutes from the subsurface as well as return the ground surface to its natural state. Throughout these three phases, the water is consumed and produced. Consumption is account for through the drill process, dust control, returning the ground water to its initial level and make up water losses during the remedial flushing of the retort zone. Production of water is through the dewatering of the retort zone, and during chemical pyrolysis reaction of the kerogen conversion. The major water consumption was during the remediation of the insitu retorting zone.

  17. Evaluation of physical-chemical and biological treatment of shale oil retort water

    Energy Technology Data Exchange (ETDEWEB)

    Mercer, B.W.; Mason, M.J.; Spencer, R.R.; Wong, A.L.; Wakamiya, W.

    1982-09-01

    Bench scale studies were conducted to evaluate conventional physical-chemical and biological treatment processes for removal of pollutants from retort water produced by in situ shale oil recovery methods. Prior to undertaking these studies, very little information had been reported on treatment of retort water. A treatment process train patterned after that generally used throughout the petroleum refining industry was envisioned for application to retort water. The treatment train would consist of processes for removing suspended matter, ammonia, biodegradable organics, and nonbiodegradable or refractory organics. The treatment processes evaluated include anaerobic digestion and activated sludge for removal of biodegradable organics and other oxidizable substances; activated carbon adsorption for removal of nonbiodegradable organics; steam stripping for ammonia removal; and chemical coagulation, sedimentation and filtration for removal of suspended matter. Preliminary cost estimates are provided.

  18. Development of RM-1 type coated electrode for reducing retorts in magnesium refining

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    According to the working condition of high temperature oxidation and sulphidation corrosion of the ZG35Cr24Ni7SiN heat-resisting stainless steel used for reducing retort in magnesium refining, and the practical situation which the weld metal between the body and cover of reducing retort must possess resisting high temperature oxidation and corrosion, a kind of RM-1 type coated electrode for reducing retorts in magnesium refining with special alloying system and excellent usability has been developed. The RM-1 coated electrode is made of H0Cr21Ni10 wire core and is alloyed chromium and nickel simultaneously through coating material and wire core and some rare-earth oxides are added in coating material. The electrode has been verified to be satisfied the operation requirements of practical production.

  19. Method for forming an in situ oil shale retort with horizontal free faces

    Science.gov (United States)

    Ricketts, Thomas E.; Fernandes, Robert J.

    1983-01-01

    A method for forming a fragmented permeable mass of formation particles in an in situ oil shale retort is provided. A horizontally extending void is excavated in unfragmented formation containing oil shale and a zone of unfragmented formation is left adjacent the void. An array of explosive charges is formed in the zone of unfragmented formation. The array of explosive charges comprises rows of central explosive charges surrounded by a band of outer explosive charges which are adjacent side boundaries of the retort being formed. The powder factor of each outer explosive charge is made about equal to the powder factor of each central explosive charge. The explosive charges are detonated for explosively expanding the zone of unfragmented formation toward the void for forming the fragmented permeable mass of formation particles having a reasonably uniformly distributed void fraction in the in situ oil shale retort.

  20. Mercury isotope fractionation during ore retorting in the Almadén mining district, Spain

    Science.gov (United States)

    Gray, John E.; Pribil, Michael J.; Higueras, Pablo L.

    2013-01-01

    Almadén, Spain, is the world's largest mercury (Hg) mining district, which has produced over 250,000 metric tons of Hg representing about 30% of the historical Hg produced worldwide. The objective of this study was to measure Hg isotopic compositions of cinnabar ore, mine waste calcine (retorted ore), elemental Hg (Hg0(L)), and elemental Hg gas (Hg0(g)), to evaluate potential Hg isotopic fractionation. Almadén cinnabar ore δ202Hg varied from − 0.92 to 0.15‰ (mean of − 0.56‰, σ = 0.35‰, n = 7), whereas calcine was isotopically heavier and δ202Hg ranged from − 0.03‰ to 1.01‰ (mean of 0.43‰, σ = 0.44‰, n = 8). The average δ202Hg enrichment of 0.99‰ between cinnabar ore and calcines generated during ore retorting indicated Hg isotopic mass dependent fractionation (MDF). Mass independent fractionation (MIF) was not observed in any of the samples in this study. Laboratory retorting experiments of cinnabar also were carried out to evaluate Hg isotopic fractionation of products generated during retorting such as calcine, Hg0(L), and Hg0(g). Calcine and Hg0(L) generated during these retorting experiments showed an enrichment in δ202Hg of as much as 1.90‰ and 0.67‰, respectively, compared to the original cinnabar ore. The δ202Hg for Hg0(g) generated during the retorting experiments was as much as 1.16‰ isotopically lighter compared to cinnabar, thus, when cinnabar ore was roasted, the resultant calcines formed were isotopically heavier, whereas the Hg0(g) generated was isotopically lighter in Hg isotopes.

  1. Documentation of INL’s In Situ Oil Shale Retorting Water Usage System Dynamics Model

    Energy Technology Data Exchange (ETDEWEB)

    Earl D Mattson; Larry Hull

    2012-12-01

    A system dynamic model was construction to evaluate the water balance for in-situ oil shale conversion. The model is based on a systems dynamics approach and uses the Powersim Studio 9™ software package. Three phases of an in situ retort were consider; a construction phase primarily accounts for water needed for drilling and water produced during dewatering, an operation phase includes the production of water from the retorting process, and a remediation phase water to remove heat and solutes from the subsurface as well as return the ground surface to its natural state. Throughout these three phases, the water is consumed and produced. Consumption is account for through the drill process, dust control, returning the ground water to its initial level and make up water losses during the remedial flushing of the retort zone. Production of water is through the dewatering of the retort zone, and during chemical pyrolysis reaction of the kerogen conversion. The document discusses each of the three phases used in the model.

  2. Energy and process substitution in the frozen-food industry: geothermal energy and the retortable pouch

    Energy Technology Data Exchange (ETDEWEB)

    Stern, M.W.; Hanemann, W.M.; Eckhouse, K.

    1981-12-01

    An assessment is made of the possibilities of using geothermal energy and an aseptic retortable pouch in the food processing industry. The focus of the study is on the production of frozen broccoli in the Imperial Valley, California. Background information on the current status of the frozen food industry, the nature of geothermal energy as a potential substitute for conventional fossil fuels, and the engineering details of the retortable pouch process are covered. The analytical methodology by which the energy and process substitution were evaluated is described. A four-way comparison of the economics of the frozen product versus the pouched product and conventional fossil fuels versus geothermal energy was performed. A sensitivity analysis for the energy substitution was made and results are given. Results are summarized. (MCW)

  3. Hot gas stripping of ammonia and carbon dioxide from simulated and actual in situ retort waters

    Energy Technology Data Exchange (ETDEWEB)

    Murphy, C.L.

    1979-01-01

    This study proved that ammonia and carbon dioxide could be removed from retort water by hot gas stripping and that overall transfer rates were slower than for physical desorption alone. The ammonia in solution complexed with the carbonate species with the result that the CO/sub 2/ transfer rates were linked to the relatively slower desorption of NH/sub 3/ from solution. Ionic reactions in the liquid phase limited the quantity of free NH/sub 3/ and CO/sub 2/, thus decreasing the driving forces for mass transfer. The retort water exhibited foaming tendencies that affected the interfacial area which should be taken into account if a stripping tower is considered on a larger scale. Transfer unit heights were calculated for the process conditions studied and correlated such that scaleup to increased capacities is possible.

  4. Withdrawal of gases and liquids from an in situ oil shale retort

    Science.gov (United States)

    Siegel, Martin M.

    1982-01-01

    An in situ oil shale retort is formed within a subterranean formation containing oil shale. The retort contains a fragmented permeable mass of formation particles containing oil shale. A production level drift extends below the fragmented mass, leaving a lower sill pillar of unfragmented formation between the production level drift and the fragmented mass. During retorting operations, liquid and gaseous products are recovered from a lower portion of the fragmented mass. A liquid outlet line extends from a lower portion of the fragmented mass through the lower sill pillar for conducting liquid products to a sump in the production level drift. Gaseous products are withdrawn from the fragmented mass through a plurality of gas outlet lines distributed across a horizontal cross-section of a lower portion of the fragmented mass. The gas outlet lines extend from the fragmented mass through the lower sill pillar and into the production level drift. The gas outlet lines are connected to a gas withdrawal manifold in the production level drift, and gaseous products are withdrawn from the manifold separately from withdrawal of liquid products from the sump in the production level drift.

  5. Lethality of Rendang packaged in multilayer retortable pouch with sterilization process

    Science.gov (United States)

    Praharasti, A. S.; Kusumaningrum, A.; Frediansyah, A.; Nurhikmat, A.; Khasanah, Y.; Suprapedi

    2017-01-01

    Retort Pouch had become a choice to preserve foods nowadays, besides the used of the can. Both had their own advantages, and Retort Pouch became more popular for the reason of cheaper and easier to recycle. General Method usually used to estimate the lethality of commercial heat sterilization process. Lethality value wa s used for evaluating the efficacy of the thermal process. This study aimed to find whether different layers of pouch materials affect the lethality value and to find differences lethality in two types of multilayer retort pouch, PET/Aluminum Foil/Nylon/RCPP and PET/Nylon/Modified Aluminum/CPP. The result showed that the different layer arrangement was resulted different Sterilization Value (SV). PET/Nylon/Modified Aluminum/CPP had better heat penetration, implied by the higher value of lethality. PET/Nylon/Modified Aluminum/CPP had the lethality value of 6,24 minutes, whereas the lethality value of PET/Aluminum Foil/Nylon/RCPP was 3,54 minutes.

  6. Assessment of the long-term stability of retort pouch foods to support extended duration spaceflight.

    Science.gov (United States)

    Catauro, Patricia M; Perchonok, Michele H

    2012-01-01

    To determine the suitability of retort processed foods to support long-duration spaceflight, a series of 36-mo accelerated shelf life studies were performed on 13 representative retort pouch products. Combined sensory evaluations, physical properties assessments, and nutritional analyses were employed to determine shelf life endpoints for these foods, which were either observed during the analysis or extrapolated via mathematical projection. Data obtained through analysis of these 13 products were later used to estimate the shelf life values of all retort-processed spaceflight foods. In general, the major determinants of shelf life appear to be the development of off-flavor and off-color in products over time. These changes were assumed to be the result of Maillard and oxidation reactions, which can be initiated or accelerated as a result of the retort process and product formulation. Meat products and other vegetable entrées are projected to maintain their quality the longest, between 2 and 8 y, without refrigeration. Fruit and dessert products (1.5 to 5 y), dairy products (2.5 to 3.25 y), and starches, vegetable, and soup products (1 to 4 y) follow. Aside from considerable losses in B and C vitamin content, nutritional value of most products was maintained throughout shelf life. Fortification of storage-labile vitamins was proposed as a countermeasure to ensure long-term nutritive value of these products. The use of nonthermal sterilization technologies was also recommended, as a means to improve initial quality of these products and extend their shelf life for use in long-duration missions. Data obtained also emphasize the importance of low temperature storage in maintaining product quality. Retort sterilized pouch products are garnering increased commercial acceptance, largely due to their improved convenience and quality over metal-canned products. Assessment of the long-term stability of these products with ambient storage can identify potential areas for

  7. Wet scrubbing for control of particular emissions from oil shale retorting

    Energy Technology Data Exchange (ETDEWEB)

    Rinaldi, G.M.; Thurnau, R.C.; Lotwala, J.T.

    1981-01-01

    A mobile pilot-scale venturi scrubber was tested for control of particulate emissions from the Laramie Energy Techonolgy Center's 136-mg (150-ton)-capacity oil shale retort. The entire retort off-gas flow of 15.4 m/sup 3//min (545 ft/sup 3//min), discharged from a heat exchanger at a temperature of 58 /degree/C and saturated with water, was scrubbed at liquid-to-gas ratios of l.5 to 2.4 L/m/sup 3/. Sampling and analysis of the scrubber inlet and outlet gases were conducted to determine particulate removal. Outlet particulate concentrations were consistently reduced to 35 mg/m/sup 3/, even through inlet loadings varied from 125 to 387 mg/m/sup 3/ and 50 weight percent of the particles were less than four micrometers in diameter. Particulate control efficiencies up to 94 percent were achieved, although no correlation to liquid-to-gas ratio was observed. Simultaneous control of ammonia emissions, at efficiencies up to 75 percent, was also observed. 5 refs.

  8. Economics derived from detailed and definitive design of Superior's Circlar Grate Retort for an 18,000 BPD oil shale demonstration plant

    Energy Technology Data Exchange (ETDEWEB)

    Lilley, D.F.; Fishback, J.W.

    1983-04-01

    Superior Oil Company has continued efforts to reduce to practice the Superior retorting technology as applied to oil shale. From February 1981 to October 1982, Superior has participated in a cost sharing agreement with the Department of Energy for detailed design of the Superior Circular Grate Retort, definitive design of retort ancillaries, auxiliaries and offsites, and mining, and for capital and operating cost estimates for a nominal 18,000 BPD oil shale plant. The terms, detailed design and definitive design, are defined. The design documents are described in sufficient detail to render an overview to the reader of the basis used for project cost estimates and economic analysis.

  9. Development of retort porch bovine runnet%牛百叶软罐头的研制

    Institute of Scientific and Technical Information of China (English)

    吴红棉; 董萍; 洪鹏志

    2001-01-01

    以牛百叶为原料,以PET/AL/PP复合蒸煮袋作包装材料,经原料处理、预煮、油炸、浸汤、真空封口、杀菌等工序,制得牛百叶软罐头。研究了各工序中的最佳工艺条件及不同的复合材料包装袋对制品质量的影响。%A PET/AL/PP packed retort porch bovine runnet was d eveloped bypretreatment,precooking,frying,soaking,vacuum packaging and steriliz ation. The effects of processing parameters and packaging materials on the quali ty of the product were studied.

  10. Acid mine drainage potential of raw, retorted, and combusted Eastern oil shale: Final report

    Energy Technology Data Exchange (ETDEWEB)

    Sullivan, P.J.; Yelton, J.L.; Reddy, K.J.

    1987-09-01

    In order to manage the oxidation of pyritic materials effectively, it is necessary to understand the chemistry of both the waste and its disposal environment. The objective of this two-year study was to characterize the acid production of Eastern oil shale waste products as a function of process conditions, waste properties, and disposal practice. Two Eastern oil shales were selected, a high pyrite shale (unweathered 4.6% pyrite) and a low pyrite shale (weathered 1.5% pyrite). Each shale was retorted and combusted to produce waste products representative of potential mining and energy conversion processes. By using the standard EPA leaching tests (TCLP), each waste was characterized by determining (1) mineralogy, (2) trace element residency, and (3) acid-base account. Characterizing the acid producing potential of each waste and potential trace element hazards was completed with laboratory weathering studies. 32 refs., 21 figs., 12 tabs.

  11. Optimization of processing conditions for the sterilization of retorted short-rib patties using the response surface methodology.

    Science.gov (United States)

    Choi, Su-Hee; Cheigh, Chan-Ick; Chung, Myong-Soo

    2013-05-01

    The aim of this study was to determine the optimum sterilization conditions for short-rib patties in retort trays by considering microbiological safety, nutritive value, sensory characteristics, and textural properties. In total, 27 sterilization conditions with various temperatures, times, and processing methods were tested using a 3(3) factorial design. The response surface methodology (RSM) and contour analysis were applied to find the optimum sterilization conditions for the patties. Quality attributes were significantly affected by the sterilization temperature, time, and processing method. From RSM and contour analysis, the final optimum sterilization condition of the patties that simultaneously satisfied all specifications was determined to be 119.4°C for 18.55min using a water-cascading rotary mode. The findings of the present study suggest that using optimized sterilization conditions will improve the microbial safety, sensory attributes, and nutritional retention for retorted short-rib patties.

  12. Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top

    Science.gov (United States)

    Cha, Chang Y.

    1980-01-01

    An in situ oil shale retort having a top boundary of unfragmented formation and containing a fragmented permeable mass has a pocket at the top, that is, an open space between a portion of the top of the fragmented mass and the top boundary of unfragmented formation. To establish a combustion zone across the fragmented mass, a combustion zone is established in a portion of the fragmented mass which is proximate to the top boundary. A retort inlet mixture comprising oxygen is introduced to the fragmented mass to propagate the combustion zone across an upper portion of the fragmented mass. Simultaneously, cool fluid is introduced to the pocket to prevent overheating and thermal sloughing of formation from the top boundary into the pocket.

  13. Gamma 60Co-irradiation of organic matter in the Phosphoria Retort Shale

    Science.gov (United States)

    Lewan, M. D.; Ulmishek, G. F.; Harrison, W.; Schreiner, F.

    1991-04-01

    Irradiation experiments were conducted on a thermally immature rock sample of the Phosphoria Retort Shale and its isolated kerogen. A 60Co-source for gamma radiation was employed at dosages ranging from 81 to 885 Mrads, which are attainable by Paleozoic and Precambrian black shales with syngenetic uranium enrichments. Kerogen elemental, isotopic, and pyrolysate compositions are not affected at these dosages, but the bitumens extracted from the irradiated rock are affected. The major effects are reductions in the amounts of bitumen, acyclic isoprenoids, and high-molecular weight acyclic carboxylic acids. Natural differences in the amounts of bitumen and acyclic isoprenoid due to regional and stratigraphie variations in organic source input and depositional conditions make the radiation-induced reductions in these parameters difficult to use as indicators of natural radiation damage in black shales. However, the preferential reduction in the high-molecular weight acyclic carboxylic acids, which are ubiquitous in the living precursory organic matter, is diagnostic of experimental γ-irradiation but may not be diagnostic of natural irradiation. The overall process associated with radiation damage is polymerization by cross-linking through a free radical mechanism. As a result, irradiation of organic matter in black shales is more likely to retard rather than enhance petroleum generation.

  14. Fluidized-bed retorting of Colorado oil shale: Topical report. [None

    Energy Technology Data Exchange (ETDEWEB)

    Albulescu, P.; Mazzella, G.

    1987-06-01

    In support of the research program in converting oil shale into useful forms of energy, the US Department of Energy is developing systems models of oil shale processing plants. These models will be used to project the most attractive combination of process alternatives and identify future direction for R and D efforts. With the objective of providing technical and economic input for such systems models, Foster Wheeler was contracted to develop conceptual designs and cost estimates for commercial scale processing plants to produce syncrude from oil shales via various routes. This topical report summarizes the conceptual design of an integrated oil shale processing plant based on fluidized bed retorting of Colorado oil shale. The plant has a nominal capacity of 50,000 barrels per operating day of syncrude product, derived from oil shale feed having a Fischer Assay of 30 gallons per ton. The scope of the plant encompasses a grassroots facility which receives run of the mine oil shale, delivers product oil to storage, and disposes of the processed spent shale. In addition to oil shale feed, the battery limits input includes raw water, electric power, and natural gas to support plant operations. Design of the individual processing units was based on non-confidential information derived from published literature sources and supplemented by input from selected process licensors. The integrated plant design is described in terms of the individual process units and plant support systems. The estimated total plant investment is similarly detailed by plant section and an estimate of the annual operating requirements and costs is provided. In addition, the process design assumptions and uncertainties are documented and recommendations for process alternatives, which could improve the overall plant economics, are discussed.

  15. Effects of in-situ oil-shale retorting on water quality near Rock Springs, Wyoming, Volume 1

    Energy Technology Data Exchange (ETDEWEB)

    Lindner-Lunsford, J.B.; Eddy, C.A.; Plafcan, M.; Lowham, H.W.

    1990-12-01

    Experimental in-situ retorting techniques (methods of extracting shale oil without mining) were used from 1969 to 1979 by the Department of Energy's (DOE) Laramie Energy Technology Center (LETC) at a test area near Rock Springs in southwestern Wyoming. The retorting experiments at site 9 have produced elevated concentrations of some contaminants in the ground water. During 1988 and 1989, the US Geological Survey, in cooperation with the US Department of Energy, conducted a site characterization study to evaluate the chemical contamination of ground water at the site. Water samples from 34 wells were analyzed; more than 70 identifiable organic compounds were detected using a combination of gas chromatography and mass spectrometry analytical methods. This report provides information that can be used to evaluate possible remedial action for the site. Remediation techniques that may be applicable include those techniques based on removing the contaminants from the aquifer and those based on immobilizing the contaminants. Before a technique is selected, the risks associated with the remedial action (including the no-action alternative) need to be assessed, and the criteria to be used for decisions regarding aquifer restoration need to be defined. 31 refs., 23 figs., 9 tabs.

  16. Heavy metal removal from produced water using retorted shale; Remocao de metais pesados em aguas produzidas utilizando xisto retortado

    Energy Technology Data Exchange (ETDEWEB)

    Pimentel, Patricia M.; Melo, Marcos A.F.; Melo, Dulce M.A.; Silva Junior, Carlos N.; Assuncao, Ary L.C. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Anjos, Marcelino J. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia

    2004-07-01

    The Production of oil and gas is usually accompanied by the production of large volume of water that can have significant environmental effects if not properly treated. In this work, the use of retort shale was investigated as adsorbent agent to remove heavy metals in produced water. Batch adsorption studies in synthetic solution were performed for several metal ions. The efficiency removal was controlled by solution pH, adsorbent dosage, and initial ion concentration and agitation times. Two simple kinetic models were used, pseudo-first- and second-order, were tested to investigate the adsorption mechanisms. The equilibrium data fitted well with Langmuir and Freundlich models. The produced water samples were treated by retorted shale under optimum adsorption conditions. Synchrotron radiation total reflection X-ray fluorescence was used to analyze the elements present in produced water samples from oil field in Rio Grande do Norte, Brazil. The removal was found to be approximately 20-50% for Co, Ni, Sr and above 80% for Cr, Ba, Hg and Pb. (author)

  17. Environmental research plan for the Geokinetics Inc. investigation of the horizontal in situ oil shale retorting process

    Energy Technology Data Exchange (ETDEWEB)

    Spradlin, H.K.L.; Hutchinson, D.L.; Mankowski, S.G.

    1979-11-30

    The development of a horizontal in-situ retorting process may have significant impacts upon valuable environmental resources. A research program has been developed to identify, assess, and minimize the adverse environmental impacts which may result. The goals are to: describe the environment as it existed prior to disturbance; determine the nature and extent of the changes; develop and implement measures to minimize the adverse impacts; develop and implement reclamation procedures which will return the affected land to its original level; and coordinate measures to protect the health and safety of persons and animals which may be affected by the activities. Specific research areas are outlined. These include atmospheric, hydrologic, terrestrial ecology, and social/economic research. (DMC)

  18. Advanced retorting, microwave assisted thermal sterilization (MATS), and pressure assisted thermal sterilization (PATS) to process meat products.

    Science.gov (United States)

    Barbosa-Cánovas, Gustavo V; Medina-Meza, Ilce; Candoğan, Kezban; Bermúdez-Aguirre, Daniela

    2014-11-01

    Conventional thermal processes have been very reliable in offering safe sterilized meat products, but some of those products are of questionable overall quality. Flavor, aroma, and texture, among other attributes, are significantly affected during such processes. To improve those quality attributes, alternative approaches to sterilizing meat and meat products have been explored in the last few years. Most of the new strategies for sterilizing meat products rely on using thermal approaches, but in a more efficient way than in conventional methods. Some of these emerging technologies have proven to be reliable and have been formally approved by regulatory agencies such as the FDA. Additional work needs to be done in order for these technologies to be fully adopted by the food industry and to optimize their use. Some of these emerging technologies for sterilizing meat include pressure assisted thermal sterilization (PATS), microwaves, and advanced retorting. This review deals with fundamental and applied aspects of these new and very promising approaches to sterilization of meat products. Copyright © 2014 Elsevier Ltd. All rights reserved.

  19. Improved and more environmentally friendly charcoal production system using a low-cost retort-kiln (Eco-charcoal)

    Energy Technology Data Exchange (ETDEWEB)

    Adam, J.C. [Adam and Partner, Bahnhofstrasse 13, 82467 Garmisch (Germany)

    2009-08-15

    Research into a low-cost retort-kiln, used to produce charcoal from sustainably managed forests in a more environmentally friendly way (Eco-Charcoal), has been completed and pilot units have been built in India and East Africa. The unit is called ICPS (Improved Charcoal Production System). Importantly, it has a much higher efficiency rating than traditional earth-mound kilns, which have until now been the main means of domestic charcoal production in developing nations. The efficiency of traditional charcoal production methods is about 10%-22% (calculated on using oven-dry wood with 0% water content) while the efficiency of the ICPS is approximately 30%-42%. As compared with traditional carbonisation processes, the ICPS reduces emissions to the atmosphere by up to 75%. The ICPS works in two different phases. During the first phase the ICPS works like a traditional kiln; however, waste wood is burned in a separate fire box to dry the wood. During the second phase of operation the harmful volatiles are burned in a hot 'fire chamber' meaning all resulting emissions are cleaner, minus these already reduced volatiles. The heat gained by flaring the wood gazes, is used and recycled to accelerate the carbonisation process. Unlike traditional methods the ICPS can complete a carbonisation cycle within 12 h. (author)

  20. Explosion limits analysis of oil shale retorting under areobic condition%油页岩含氧干馏工艺流程爆炸极限分析

    Institute of Scientific and Technical Information of China (English)

    周洁琼; 张福群; 刘云义

    2012-01-01

    The main industrial utilization of oil shale is to produce shale oil through a retorting process. In order to lower the carrier gas temperature so as to save energy consumption and achieve better industrial application potential , moderate amount of oxygen was added to the carrier gas in the oil shale retorting process. And the potential security problems owing to combustible mixtures might occur. These tests focused on how gaseous products of thermal decomposition of oil shale changed depending on pyrolysis temperature. Explosion limits under different temperature and inert gas condition combining with theoretical study on explosion limits were analyzed and calculated. The results showed that H2, CH4 are the main combustible gas of the retorting process and the process caused no explosion hazards because of the concentration of flammable gas did not within the limits of explosion danger zone in the whole heating process. It was suggested to prevent explosive occurrence of that process by controlling oxygen flow. The results can give a reference to quantitative understanding gas release law in process of oil shale retorting under areobic condition and antiexplosion treatment.%根据干馏工艺流程配入适量氧气,可以降低载热气体需要预热的温度,以实现低能耗、易于工业生产的特点,设计了一套新型的有氧干馏工艺流程.有氧干馏工艺因其过程中存在可燃性混合物,有发生爆炸事故的可能性,通过实验对所收集的不同温度下的干馏气体的成分与含量进行了分析,结合爆炸极限理论,对该有氧干馏工艺流程的不同温度、不同惰性气体含量条件下可燃气体爆炸极限进行了分析计算.结果表明,可燃气体的浓度在整个反应升温过程中始终没有进入爆炸危险区域,说明该实验装置不具备爆炸危险性;对干馏工艺流程中氧气的输入量的控制,可以防止该工艺流程的火灾爆炸的发生.

  1. Effect of different binders on the physico-chemical, textural, histological, and sensory qualities of retort pouched buffalo meat nuggets.

    Science.gov (United States)

    Devadason, I Prince; Anjaneyulu, A S R; Babji, Y

    2010-01-01

    The functional properties of 4 binders, namely corn starch, wheat semolina, wheat flour, and tapioca starches, were evaluated to improve the quality of buffalo meat nuggets processed in retort pouches at F(0) 12.13. Incorporation of corn starch in buffalo meat nuggets produced more stable emulsion than other binders used. Product yield, drip loss, and pH did not vary significantly between the products with different binders. Shear force value was significantly higher for product with corn starch (0.42 +/- 0.0 Kg/cm(3)) followed by refined wheat flour (0.36 +/- 0.010 Kg/cm(3)), tapioca starch (0.32 +/- 0.010 Kg/cm(3)), and wheat semolina (0.32 +/- 0.010 Kg/cm(3)). Type of binder used had no significant effect on frying loss, moisture, and protein content of the product. However, fat content was higher in products with corn starch when compared to products with other binders. Texture profile indicated that products made with corn starch (22.17 +/- 2.55 N) and refined wheat flour (21.50 +/- 0.75 N) contributed firmer texture to the product. Corn starch contributed greater chewiness (83.8 +/- 12.51) to the products resulting in higher sensory scores for texture and overall acceptability. Products containing corn starch showed higher sensory scores for all attributes in comparison to products with other binders. Panelists preferred products containing different binders in the order of corn starch (7.23 +/- 0.09) > refined wheat flour (6.48 +/- 0.13) > tapioca starch (6.45 +/- 0.14) > wheat semolina (6.35 +/- 0.13) based on sensory scores. Histological studies indicated that products with corn starch showed dense protein matrix, uniform fat globules, and less number of vacuoles when compared to products made with other binders. The results indicated that corn flour is the better cereal binder for developing buffalo meat nuggets when compared to all other binders based on physico-chemical and sensory attributes.

  2. Sterilization of Staple Foods in Retort Pouch%软包装主食罐头杀菌工艺研究

    Institute of Scientific and Technical Information of China (English)

    郑志强; 刘嘉喜; 王越鹏

    2012-01-01

    对软包装主食罐头的杀菌工艺进行研究,分析在不同杀菌温度和时间条件下食品中心温度及F值的变化,确定最佳杀菌方式为双峰高温杀菌,杀菌参数为80℃、5min,110℃、5min,121℃、12min,125℃、(30+30)s,峰底113℃,该杀菌工艺能够有效降低软包装主食罐头的杀菌强度,杀菌后的产品大大降低了因高温产生的后熟蒸馏味,大幅延长了保质期,最终产品品质显著提高。%This study was undertaken to investigate the sterilization of retort pouches containing staple foods.Variations in central temperature and F value were analyzed under various conditions of sterilization temperature and time.The optimal sterilization process was double peak high temperature sterilization at 80 ℃ for 5 min,110 ℃ for 5 min,121 ℃ for 12 min and 125 ℃ for 30 s + 30 s with a peak base temperature of 113 ℃.Under these conditions,the sterilization intensity of retort pouches was attenuated effectively.Moreover,the distillation odor caused by high-temperature sterilization was reduced greatly,and the shelf life was markedly extended.As a result,the quality of staple foods could be obviously improved.

  3. 牛蒡花生软罐头的加工工艺%Study on Processing Technology of Arctium lappa L.and Peanut Retort Pouch

    Institute of Scientific and Technical Information of China (English)

    曹雪慧; 王奔

    2011-01-01

    Using Arctium lappa L. and peanut as materials, the processing technology of retort pouch is studied.The results show that the better color protective condition is immersing Arctium lappa L. in 0.5% of citrate, 1.5% of salt, and 0.2% of CaCl2. The optimal formula is consisted of 1.5% of sucrose, 0.2% of monosodium glutamate,3% of salt, and 1.2% of yellow wine based on the orthogonal test. The Arctium lappa L and peanut retort pouch with rich nutrition and unique taste can be achieved after being sterilized 10′-30′- 10′/121℃ and cooling at reverse -pressure at 0.12MPa.%以牛蒡和花生为原料,对软罐头生产的工艺进行研究,结果表明:采用柠檬酸0.5%、食盐1.5%、CaCl20.2%的复合护色剂对牛蒡有较好护色效果,通过正交试验得出最佳的汤汁配比为白砂糖1.5%,味精0.2%,食盐3%,黄酒1.2%,经10′-30′-10′/121℃,反压0.12 MPa杀菌处理后,可生产出营养丰富,口感独特的牛蒡花生软罐头.

  4. A "Retort Courteous."

    Science.gov (United States)

    Kingsbury, Mary E.

    1979-01-01

    Responds to article by Pauline Wilson (School Library Journal, v25 n6 Feb 1979) in terms of defining the role of children's librarians, clarifying the goals of children's services, making a case for such services, improving the impression made by children's librarians, determining appropriate preparation, and understanding and achieving quality…

  5. 油页岩干馏厂污水处理工艺的设计%Design and Application of Wastewater Treatment Process in Oil Shale Retorting Plant

    Institute of Scientific and Technical Information of China (English)

    上官中华; 李魏山; 王铮

    2013-01-01

    Oil shale retort wastewater is characterized by high concentrations of organic compounds, ammonia nitrogen and oils, many types of pollutants and refractory degradation. This type of wastewater was designed to be pretreated separately, and the stripper was used to reduce ammonia nitrogen to below 200 mg/L and oil to below 20 mg/L. The treated wastewater was mixed with domestic sewage for biochemical treatment. The final effluent quality met the first class criteria specified in the Integrated Wastewater Discharge Standard ( GB 8978 - 1996).%针对某污水处理站油页岩干馏废水中有机物浓度高、氨氮高、含油量高、污染物种类多、难降解的特性,设计对该部分生产废水单独做预处理,使动植物油降到20 mg/L以下,然后采用氨吹脱塔去除氨氮,使出水氨氮降到200 mg/L以下,而后再与生活污水混合后进行生化处理,出水水质达到《污水综合排放标准》(GB 8978-1996)的一级标准,其经验值得推广借鉴.

  6. 油页岩干馏工艺积碳特性正交分析%Oil Shale Retorting Process Characteristic Orthogonal Carbon Analysis

    Institute of Scientific and Technical Information of China (English)

    柏静儒; 许伟; 潘朔; 张本熙

    2015-01-01

    To evaluate coking behavior of oil shale full cycle carbonization process,we established the experi-mental table independently. Determining that propylene is the main matrix coking among various of organic ga-ses of retorting gas of oil shale based on self-building experiment table and gas chromatography. I selected pro-pylene as carbon source to analysis the phenomenon of coking in different cases ( reaction time/wall tempera-ture/gas flow rate) . Coke amount increased with the longer reaction time and higher wall temperature ( under 800 ℃) ,Coke amount continuous increased with the increasing of gas flow rate until the gas flow rate reached 30 mL·min-1 meeting a sudden decrease. According to the result of experiments,the influence degree of co-king behavior by different cases is as follows:reaction time> gas flow rate > wall temperature.%通过自建实验台模拟瓦斯全循环油页岩干馏工艺并进行积碳实验,利用气相色谱仪对积碳反应前后瓦斯气组分性质进行分析。使用丙烯为碳源气,观察不同工况下(反应时间、壁面温度、气体流量)的积碳现象。结果表明:瓦斯气中主要积碳母体为烯烃,含量最高为丙烯。积碳量随反应时间和壁面温度(800℃以下)的增加而增加,随气体流量的增加而变化,流量达到30 mL·min-1后积碳量开始减少。各工况对积碳现象的影响程度依次是反应时间>气体流量>壁面温度。

  7. Thermal inactivation of Listeria monocytogenes and Yersinia enterocolitica in minced beef under laboratory conditions and in sous-vide prepared minced and solid beef cooked in a commercial retort.

    Science.gov (United States)

    Bolton, D J; McMahon, C M; Doherty, A M; Sheridan, J J; McDowell, D A; Blair, I S; Harrington, D

    2000-04-01

    D-values were obtained for Listeria monocytogenes and Yersinia enterocolitica at 50, 55 and 60 degrees C in vacuum-packed minced beef samples heated in a laboratory water-bath. The experiment was repeated using vacutainers, which allowed heating of the beef to the desired temperature before inoculation. D-values of between 0.15 and 36.1 min were obtained for L. monocytogenes. Pre-heating the beef samples significantly affected (P < 0.05) the D60 value only. D-values for Y. enterocolitica ranged from 0.55 to 21.2 min and all the D-values were significantly different (P < 0.05) after pre-heating. In general, the D-values obtained for core inoculated solid beef samples were significantly higher (P < 0.05) than those generated in minced beef when heated in a Barriquand Steriflow commercial retort.

  8. 直立炉、焦炉荒煤气微压自动调节的改进%The improvement of micropressure automatic control for raw gas from vertical retorts and tar ovens

    Institute of Scientific and Technical Information of China (English)

    薛润林; 张勇; 刘玉霞

    2001-01-01

    This article presents the use of rapid dampers in a raw gas pressure control system to change the pressure tap position of a speed governor for improving the top pressure of a vertical retort and a tar oven. This technological improvement can keep the pneumatic or electric butter fly valves working in a stable way and the raw gas micropressure proper under automatic control.%本文介绍了对直立炉、焦炉炉顶压力,使用快速阻尼器改进变速器取压点位置等技改措施,确保气动蝶阀和电动蝶阀的稳定运行,实现荒煤气微压自动调节。

  9. Rapid Retort Processing of Eggs

    Science.gov (United States)

    2006-12-04

    Vegetable Oil 5.5 0.0 Liquid Margarine 3.000 2.981 Modified waxy maize Pre-gelatinized instant starch 2.0 0.0 Salt...known as insoluble yolk globules that are only disrupted at high concentrations of salt or urea . Free floating granules are smaller than YS, having a

  10. Effect of oxygen permeance of retort pouches on quality degradation in boiled bamboo shoots%蒸煮袋材料透氧性对水煮笋品质劣变的影响

    Institute of Scientific and Technical Information of China (English)

    潘梦垚; 卢立新; 唐亚丽; 王军

    2013-01-01

    研究了蒸煮袋材料透氧性对其真空包装水煮笋品质劣变的影响.采用3种不同透氧量的耐高温蒸煮复合薄膜PA/PE、KPA/PE和PA/PET/SiO/PE对水煮笋进行真空包装,基于33℃恒温加速试验测定分析不同包装材料内的水煮笋感官与营养品质的劣变规律,以水煮笋色泽、硬度、可溶性蛋白质、游离氨基酸、还原糖和维生素C作为关键质量指标,比较各自的品质劣变速度.结果表明,蒸煮袋材料的氧气透过量对水煮笋各指标劣变程度影响显著(P<0.05),笋的品质劣变速度随材料透氧量的增加而提高,其中,透氧量最小的材料PA/PET/SiOx/PE对产品品质的维持效果最佳.%The effect of oxygen permeance of retort pouches on the quality deterioration of vacuum-packaged boiled bamboo shoots was studied.The boiled bamboo shoots were vacuum-packaged with three heat-resistant laminated films of PA/PE,KPA/PE and PA/PET/SiOx/PE which had different oxygen permeance.The sensory and nutritional quality degradation of boiled bamboo shoots packaged in these three materials were analyzed via constant temperature accelerating test at 33℃.The color,firmness,soluble protein,free amino acid,reducing sugar and vitamin C in boiled bamboo shoots were regarded as critical quality indexes in order to compare the respective quality degradation rate for each group of samples.The results showed that the oxygen permeance of retort pouches had a significant effect on index degradation rate of boiled bamboo shoots (P < 0.05).The degradation rates were increased with the increase of material oxygen permeance.Among all the three kinds of material,the least oxygen premeance was PA/PET/SiOx/PE and it had the best function to maintain the products quality.

  11. Caracterização e uso de xisto para adsorção de chumbo (II em solução Characterization and use of retorted shale for adsorption of lead (II in solution

    Directory of Open Access Journals (Sweden)

    P. M. Pimentel

    2006-09-01

    Full Text Available Existe um grande interesse no uso de materiais de baixo custo para remoção de metais pesados em águas residuais. Novas técnicas de processamento e adsorventes incluindo argilas, resinas sintéticas, turfa e quitosana tem sido estudados objetivando substituir o carvão ativado. No presente trabalho, xisto retortado (XR, um rejeito sólido da transformação térmica do xisto oleígeno, foi caracterizado com o objetivo de utilizá-lo como adsorventes para remoção de metais pesados. O aproveitamento desse rejeito é de grande interesse, uma vez que o Brasil possui a segunda maior reserva mundial de xisto oleígeno. Os rejeitos foram caracterizados por diferentes técnicas de caracterização, incluindo tamanho de partícula, análise termogravimétrica, fluorescência de raios X, espectroscopia na região do infravermelho, difração de raios X, e microscopia eletrônica de varredura-EDS. As características dos pós foram adequadas para os experimentos de adsorção. Estudos de adsorção de Pb2+ pelo método de banho finito foram realizados. A remoção do Pb2+ foi superior a 85%.There has been a growing interest in the use of cost-effective materials to remove heavy metals from wastewater. New processing techniques and adsorbents including natural clays, synthetic resins, peat and chitosan have been studied aiming at replacing activated coal. In the present investigation, retorted shale, a solid residue of the thermal transformation of oil shale, was characterized with the objective of preparing heavy metals adsorbents. In addition to the direct environmental benefits from the technology to wastewater, Brazil has the second world reserve of oil shale. The fine residue was fully characterized by different techniques including particle size determination, thermogravimetric analyses, BET, FTIR, X-ray diffraction, and SEM/EDS. The characteristics of the powder were appropriate for adsorption. Batch adsorption studies in Pb2+ synthetic solution

  12. Simulation and Design of Shale Flashing Retorting Recovery Oil and Gas%油页岩闪速干馏油气回收工艺设计及模拟

    Institute of Scientific and Technical Information of China (English)

    张原源; 曹祖宾; 韩冬云

    2016-01-01

    According to the process characteristics of flashing retorting process,a set of suitable for high temperature oil washing oil vapor recovery technology was designed,combined with pilot plant field data,using plus Aspen software for process simulation.Shale oil was separated to heavy oil,heavy diesel oil,light oil fraction and gasoline fraction by the oil washing method.The process produced steam as by-product and it had the advantages of high recovery rate,low oil loss,low energy consumption,and could effectively avoided environmental pollution.Using this process,the rate of gas recovery could be greatly enhanced:crude oil washing tower could recycle 39.7% of the oil steam,heavy diesel oil washing tower could recycle 60.3% of the oil steam.Compared with the traditional process,it could improve the recovery rate of 10%-20%.%针对闪速干馏工艺特点,设计了一套适合高温油洗法回收油气工艺,并结合中试装置现场数据,运用Aspen Plus 软件进行了工艺模拟.油洗工艺可将页岩油粗分为重油、重柴油馏分、轻油馏分、汽油馏分.该工艺副产水蒸气,具有油损失小、能耗低、可减轻环境污染等特点,采用该回收工艺,可大幅度提升干馏油气的回收率,重油洗涤塔可回收 39.7%的油蒸气,重柴油洗涤塔可回收 60.3%的油蒸气,与传统工艺相比回收率可提高 10%~20%.

  13. Retort to Religious Critics of RET.

    Science.gov (United States)

    Nardi, Thomas J.

    This paper is concerned with people who contact clergymen for counseling who could benefit from the short-term directive therapeutic approach of Rational Emotive Therapy (RET) and the reluctance of clergymen to use RET. The integration of the precepts of Christianity and the concepts of RET is considered. This paper is specifically a response to…

  14. Retortable Laminate/Polymeric Food Tubes for Specialized Feeding

    Science.gov (United States)

    2012-06-01

    Advanced Food Technology School of Enviromental and Biological Sciences New Brunswick, NJ 08903 FTR 303 Defense Logistics Agency 8725 John J. Kingsman Rd...quality issues have elevated concerns over the future availability and viability of this critically important item. Quality, erosion, and availability... issues or production delays leading to loss of this tube supply source are of extreme concern to the military, as the missions which they support

  15. Post Retort, Pre Hydro-treat Upgrading of Shale Oil

    Energy Technology Data Exchange (ETDEWEB)

    Gordon, John

    2012-09-30

    Various oil feedstocks, including oil from oil shale, bitumen from tar sands, heavy oil, and refin- ery streams were reacted with the alkali metals lithium or sodium in the presence of hydrogen or methane at elevated temperature and pressure in a reactor. The products were liquids with sub- stantially reduced metals, sulfur and nitrogen content. The API gravity typically increased. Sodi- um was found to be more effective than lithium in effectiveness. The solids formed when sodium was utilized contained sodium sulfide which could be regenerated electrochemically back to so- dium and a sulfur product using a "Nasicon", sodium ion conducting membrane. In addition, the process was found to be effective reducing total acid number (TAN) to zero, dramatically reduc- ing the asphaltene content and vacuum residual fraction in the product liquid. The process has promise as a means of eliminating sulfur oxide and carbon monoxide emissions. The process al- so opens the possibility of eliminating the coking process from upgrading schemes and upgrad- ing without using hydrogen.

  16. Oil shale mining cost analysis. Volume I. Surface retorting process. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Resnick, B.S.; English, L.M.; Metz, R.D.; Lewis, A.G.

    1981-01-01

    An Oil Shale Mining Economic Model (OSMEM) was developed and executed for mining scenarios representative of commercially feasible mining operations. Mining systems were evaluated for candidate sites in the Piceance Creek Basin. Mining methods selected included: (1) room-and-pillar; (2) chamber-and-pillar, with spent shale backfilling; (3) sublevel stopping; and (4) sublevel stopping, with spent shale backfilling. Mines were designed to extract oil shale resources to support a 50,000 barrels-per-day surface processing facility. Costs developed for each mining scenario included all capital and operating expenses associated with the underground mining methods. Parametric and sensitivity analyses were performed to determine the sensitivity of mining cost to changes in capital cost, operating cost, return on investment, and cost escalation.

  17. Changes in Texture and Retorting Yield in Oil Shale During Its Bioleaching by Bacillus Mucilaginosus

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xue-qing; REN He-jun; LIU Na; ZHANG Lan-ying; ZHOU Rui

    2013-01-01

    Bioleaching of oil shale by Bacillus mucilaginosus was carried out in a reaction column for 13 d.The pH value of the leaching liquor decreased steadily from 7.5 to 5.5 and the free silicon dioxide concentration reached approximately 200 mg/L in it.Scanning electron microscopy(SEM) observations revealed that a mass of small particles separated from the matrix of oil shale.Energy dispersive spectrometry(EDS) analysis implied that the total content of Si,O,A1 was decreased in the particle area of the matrix.These facts indicate that the silicate was removed,leading to the structural transformation of oil shale.Comparison of the shale oil yields before and after bioleaching illustrated that approximately 10% extra shale oil was obtained.This finding suggests that the demineralisation of the oil shale by silicate bacteria improves shale oil yield.

  18. Heat transfer simulation and retort program adjustment for thermal processing of wheat based Haleem in semi-rigid aluminum containers.

    Science.gov (United States)

    Vatankhah, Hamed; Zamindar, Nafiseh; Shahedi Baghekhandan, Mohammad

    2015-10-01

    A mixed computational strategy was used to simulate and optimize the thermal processing of Haleem, an ancient eastern food, in semi-rigid aluminum containers. Average temperature values of the experiments showed no significant difference (α = 0.05) in contrast to the predicted temperatures at the same positions. According to the model, the slowest heating zone was located in geometrical center of the container. The container geometrical center F0 was estimated to be 23.8 min. A 19 min processing time interval decrease in holding time of the treatment was estimated to optimize the heating operation since the preferred F0 of some starch or meat based fluid foods is about 4.8-7.5 min.

  19. 21 CFR 113.87 - Operations in the thermal processing room.

    Science.gov (United States)

    2010-04-01

    ..., car, or crate used to hold containers in a retort, or one or more containers therein, shall, if it contains any retorted food product, be plainly and conspicuously marked with a heat-sensitive indicator, or... change has occurred in the heat-sensitive indicator as a result of retorting for all retort baskets...

  20. Occidental vertical modified in situ process for the recovery of oil from oil shale. Phase II. Quarterly progress report, September 1-November 30, 1979

    Energy Technology Data Exchange (ETDEWEB)

    McDermott, William F.

    1979-12-01

    The major activities at OOSI's Logan Wash site during the quarter were: driving the access drifts towards the underground locations for Retorts 7 and 8; manway raise boring; constructing the change house; rubbling the first lift of Mini-Retort (MR)1; preparing the Mini-Retorts for tracer testing; coring of Retort 3E; and beginning the DOE instrumentation program.

  1. Oil Sludge Treatment in Oil Shale Retorting Process%油母页岩干馏生产过程中的油泥处理

    Institute of Scientific and Technical Information of China (English)

    何红梅

    2009-01-01

    研究了在油母页岩干馏生产各个过程中的油泥的来源及其特点,利用废甲苯进行萃取、热碱水进行洗脱,处理回收页岩油.页岩油的回收率与碳酸钠的质量浓度、废甲苯的质量以及处理温度有关.把处理后的油泥渣与页岩粉尘、固硫剂等进行搅拌混合后压碇成型,经干燥后,进行低温干馏生产,从而实现油泥的资源化、无害化处理.

  2. Geokinetics in situ shale oil recovery project. Third annual report, 1979

    Energy Technology Data Exchange (ETDEWEB)

    Hutchinson, D.L.

    1980-05-01

    Objective is to develop a true in situ process for recovering shale oil using a fire front moving in a horizontal direction. The project is being conductd at a field site located 70 miles south of Vernal, Utah. During 1979, five retorts were blasted. Four of these were small retorts (approx. 7000 tons), designed to collect data for improving the blast method. The fifth retort was a prototype of a full-sized retort measuring approximately 200 ft on each side. Two retorts, blasted the previous year, were burned, and a third retort was ignited near the end of the year. A total of 5170 bbl of oil was produced during the year.

  3. Bibliography of Technical Publications and Papers, October 1978 - September 1979

    Science.gov (United States)

    1979-11-01

    for the retortable pouch. International Seminar on Retort Pouch, Organization of American States, Instituto de Technologia de Alimentos , Campinas...national Seminar on Retort Pouch, Organization of American States, Instituto de Technologia de Alimentos , Campinas, S.P. Brazil, 23-25 April 1979. 124

  4. Occidental vertical modified in situ process for the recovery of oil from oil shale, Phase 2. Construction, operation, testing, and environmental impact. Final report, August 1981-December 1982. Volume 1

    Energy Technology Data Exchange (ETDEWEB)

    Stevens, A.L.; Zahradnik, R.L.; Kaleel, R.J.

    1984-01-01

    Occidential Oil Shale, Inc. (OOSI) recently completed the demonstration of mining, rubblization, ignition, and simulataneous processing of two commericalized modified in situ (MIS) retorts at the Logas Wash facility near DeBeque, Colorado. Upon completion of Retort 6 in 1978, Occidential began incorporating all of the knowledge previously acquired in an effort to design two more commercial-sized MIS retorts. Any commercial venture of the future would require the ability to operate simultaneously more than one retort. Thus, Retorts 7 and 8 were developed during 1980 and 1981 through joint funding of the DOE and OOSI in Phase II. Rubblization of the retorts produced an average rubble void of 18.5% in the low grade shale (17 gallons per ton) at the Logan Wash site. After rubblization, bulkheads were constructed, inlet and offgas pipes were installed and connected to surface processing facilities and liquid product handling systems were connected to the retorts. Extensive instrumentation was installed in cooperation with Sandia National Laboratories for monitoring the complete operation of the retorts. After pre-ignition testing, Retort 8 was ignited in December of 1981 and Retort 7 was ignited in January of 1982. The retorts were operated without interruption from ignition until mid- November of 1982 at which time inlet gas injection was terminated and water quenching was begun. Total product yield from the two retorts was approximately 200,000 barrels of oil, or 70% of the Fischer Assay oil-in-place in the rubblized rock in the two retrots. Water quenching studies were conducted over a period of several months, with the objective of determining the rate of heat extraction from the retorts as well as determining the quantity and quality of offgas and water coming out from the quenching process. Data from these studies are also included in this Summary Report. 62 figs., 18 tabs.

  5. Paraho environmental data. Part IV. Land reclamation and revegetation. Part V. Biological effects. Part VI. Occupational health and safety. Part VII. End use

    Energy Technology Data Exchange (ETDEWEB)

    Limbach, L.K.

    1982-06-01

    Characteristics of the environment and ecosystems at Anvil Points, reclamation of retorted shale, revegetation of retorted shale, and ecological effects of retorted shale are reported in the first section of this report. Methods used in screening shale oil and retort water for mutagens and carcinogens as well as toxicity studies are reported in the second section of this report. The third section contains information concerning the industrial hygiene and medical studies made at Anvil Points during Paraho research operations. The last section discusses the end uses of shale crude oil and possible health effects associated with end use. (DMC)

  6. Effects of organic wastes on water quality from processing of oil shale from the Green River Formation, Colorado, Utah, and Wyoming

    Science.gov (United States)

    Leenheer, J.A.; Noyes, T.I.

    1986-01-01

    A series of investigations were conducted during a 6-year research project to determine the nature and effects of organic wastes from processing of Green River Formation oil shale on water quality. Fifty percent of the organic compounds in two retort wastewaters were identified as various aromatic amines, mono- and dicarboxylic acids phenols, amides, alcohols, ketones, nitriles, and hydroxypyridines. Spent shales with carbonaceous coatings were found to have good sorbent properties for organic constituents of retort wastewaters. However, soils sampled adjacent to an in situ retort had only fair sorbent properties for organic constituents or retort wastewater, and application of retort wastewater caused disruption of soil structure characteristics and extracted soil organic matter constituents. Microbiological degradation of organic solutes in retort wastewaters was found to occur preferentially in hydrocarbons and fatty acid groups of compounds. Aromatic amines did not degrade and they inhibited bacterial growth where their concentrations were significant. Ammonia, aromatic amines, and thiocyanate persisted in groundwater contaminated by in situ oil shale retorting, but thiosulfate was quantitatively degraded one year after the burn. Thiocyanate was found to be the best conservative tracer for retort water discharged into groundwater. Natural organic solutes, isolated from groundwater in contact with Green River Formation oil shale and from the White River near Rangely, Colorado, were readily distinguished from organic constituents in retort wastewaters by molecular weight and chemical characteristic differences. (USGS)

  7. 77 FR 47668 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Underground...

    Science.gov (United States)

    2012-08-09

    ...; Underground Retorts ACTION: Notice. SUMMARY: The Department of Labor (DOL) is submitting the Mine Safety and Health Administration (MSHA) sponsored information collection request (ICR) titled, ``Underground Retorts... from shale in underground metal and nonmetal I-A and I-B mines (those that operate in a combustible ore...

  8. Minimum bed parameters for in situ processing of oil shale. Third quarterly report, April 1-June 30, 1980

    Energy Technology Data Exchange (ETDEWEB)

    Tyner, C. E.

    1980-11-01

    Oil shale retort runs 028 (16% void) and 029 (7% void), composed of competent shale blocks plus shale rubble, were completed. Retort 028, processed with air at a flux of 0.017 kg/sub air//m/sup 2/ /sub shale/.second, had peak temperatures of 700/sup 0/C, a retorting rate of 1.1 m/day, and a yield of 82% FA. Retort 029, processed with air at a flux of 0.027 kg/sub air//m/sup 2//sub shale/.second, had peak temperatures of 750/sup 0/C, a retorting rate of 1.6 m/day, and a yield of 75% FA. Comparisons of retort model calculations with experimental data from previous retort run 027 (16% void, air flux of .029 kg/sub air//m/sup 2//sub shale/.second were good; observed experimental yield was 95% FA, calculated yield, 92.8%; experimental retorting rates varied from 9.5 to 8.9 cm/h, calculated rates from 10.3 to 10.0 cm/h; observed local heating rates ranged from 29 to 14/sup 0/C/h, calculated heating rates from 20 to 16/sup 0/C/h; and observed peak temperatures ranged from 815 to 825/sup 0/C, calculated from 820 to 825/sup 0/C.

  9. 9 CFR 318.306 - Processing and production records.

    Science.gov (United States)

    2010-01-01

    ....306 Section 318.306 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF... Canning and Canned Products § 318.306 Processing and production records. At least the following processing... the first can enters and the time the last can exits the retort. The retort or reel speed shall...

  10. 40 CFR 63.8266 - What definitions apply to this subpart?

    Science.gov (United States)

    2010-07-01

    ... mercury droplets, or a pool of liquid mercury, present on the floor or other surface exposed to the... chlor-alkali plant. Mercury thermal recovery unit means the retort(s) where mercury-containing wastes... recovered. Mercury thermal recovery unit vent means the discharge point of the mercury thermal recovery...

  11. Distilling solid carbonaceous materials

    Energy Technology Data Exchange (ETDEWEB)

    Ainscow, J.W.H.

    1928-11-19

    Carbonaceous materials such as coal or oil shale are distilled by being passed in a continuous stream through a retort heated externally and at temperatures increasing from the inlet to the outlet end, the distillates being taken off through openings in the retort wall.

  12. Distillation of carbonaceous material

    Energy Technology Data Exchange (ETDEWEB)

    Ainscow, J.W.H.

    1936-10-03

    To recover hydrocarbon products by distillation of carbonaceous material in a plurality of horizontal zones maintained at different temperatures, a retort has a plurality of superimposed (3) retort chambers, the uppermost being in communication at one end with a hopper and at the other end through coupled junction not shown with one end of the next lower chamber, whose opposite end communicates with lowermost chamber, the other end of which has a sealed discharge passage, tank, and conveyor not shown. Each retort chamber has stirring and conveying means consisting of helical blades (2) attached to radial arms on shaft mounted in water cooled bearings and driven through suitably mounted sprocket wheels and chains not shown. Each retort chamber has a gas dome, with pyrometer tube, and off-take connected to a common main opening into a dust eliminator which in turn connects with a plurality of vertical condensation towers of known construction, maintained at different temperatures by means of steam from a superheater not shown situated in one retort chamber. The retort heating gases pass from the furnace via zig-zag, (three) baffles under and around each retort chamber to a flue not shown.

  13. OCCIDENTAL VERTICAL MODIFIED IN SITU PROCESS FOR THE RECOVERY OF OIL FROM OIL SHALE. PHASE II

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, Reid M.

    1980-09-01

    The progress presented in this report covers the period June 1, 1980 through August 31, 1980 under the work scope for.Phase II of the DOE/Occidental Oil Shale, Inc. (OOSI) Cooperative Agreement. The major activities at OOSI 1s Logan Wash site during the quarter were: mining the voids at all levels for Retorts 7, 8 and 8x; completing Mini-Retort (MR) construction; continuing surface facility construction; tracer testing the MR 1 s; conducting Retorts 7 & 8 related Rock Fragmentation tests; setting up and debugging the Sandia B-61 trailer; and preparing the Phase II instrumentation plan.

  14. Integrated oil production and upgrading using molten alkali metal

    Energy Technology Data Exchange (ETDEWEB)

    Gordon, John Howard

    2016-10-04

    A method that combines the oil retorting process (or other process needed to obtain/extract heavy oil or bitumen) with the process for upgrading these materials using sodium or other alkali metals. Specifically, the shale gas or other gases that are obtained from the retorting/extraction process may be introduced into the upgrading reactor and used to upgrade the oil feedstock. Also, the solid materials obtained from the reactor may be used as a fuel source, thereby providing the heat necessary for the retorting/extraction process. Other forms of integration are also disclosed.

  15. Integrated oil production and upgrading using molten alkali metal

    Science.gov (United States)

    Gordon, John Howard

    2016-10-04

    A method that combines the oil retorting process (or other process needed to obtain/extract heavy oil or bitumen) with the process for upgrading these materials using sodium or other alkali metals. Specifically, the shale gas or other gases that are obtained from the retorting/extraction process may be introduced into the upgrading reactor and used to upgrade the oil feedstock. Also, the solid materials obtained from the reactor may be used as a fuel source, thereby providing the heat necessary for the retorting/extraction process. Other forms of integration are also disclosed.

  16. Role of spent shale in oil shale processing and the management of environmental residues. Final technical report, January 1979-May 1980

    Energy Technology Data Exchange (ETDEWEB)

    Hines, A.L.

    1980-08-15

    The adsorption of hydrogen sulfide on retorted oil shale was studied at 10, 25, and 60/sup 0/C using a packed bed method. Equilibrium isotherms were calculated from the adsorption data and were modeled by the Langmuir, Freundlich, and Polanyi equations. The isosteric heat of adsorption was calculated at three adsorbent loadings and was found to increase with increased loading. A calculated heat of adsorption less than the heat of condensation indicated that the adsorption was primarily due to Van der Waals' forces. Adsorption capacities were also found as a function of oil shale retorting temperature with the maximum uptake occurring on shale that was retorted at 750/sup 0/C.

  17. 2015 Subpoena and Information Request from EPA to Mercury Recyclers

    Science.gov (United States)

    EPA issued formal requests for information to five companies believed to be the primary recyclers/retorters and distributors of mercury in the United States to gain a better understanding of the mercury recycling marketplace.

  18. Fuel Gas Demonstration Plant Program. Volume I. Demonstration plant

    Energy Technology Data Exchange (ETDEWEB)

    1979-01-01

    The objective of this project is for Babcock Contractors Inc. (BCI) to provide process designs, and gasifier retort design for a fuel gas demonstration plant for Erie Mining Company at Hoyt Lake, Minnesota. The fuel gas produced will be used to supplement natural gas and fuel oil for iron ore pellet induration. The fuel gas demonstration plant will consist of five stirred, two-stage fixed-bed gasifier retorts capable of handling caking and non-caking coals, and provisions for the installation of a sixth retort. The process and unit design has been based on operation with caking coals; however, the retorts have been designed for easy conversion to handle non-caking coals. The demonstration unit has been designed to provide for expansion to a commercial plant (described in Commercial Plant Package) in an economical manner.

  19. Plan and justification for a Proof-of-Concept oil shale facility. Final report

    Energy Technology Data Exchange (ETDEWEB)

    1990-12-01

    The technology being evaluated is the Modified In-Situ (MIS) retorting process for raw shale oil production, combined with a Circulating Fluidized Bed Combustor (CFBC), for the recovery of energy from the mined shale. (VC)

  20. Plan and justification for a Proof-of-Concept oil shale facility

    Energy Technology Data Exchange (ETDEWEB)

    1990-12-01

    The technology being evaluated is the Modified In-Situ (MIS) retorting process for raw shale oil production, combined with a Circulating Fluidized Bed Combustor (CFBC), for the recovery of energy from the mined shale. (VC)

  1. Occidental vertical modified in situ process for the recovery of oil from oil shale. Phase II. Quarterly progress report, September 1, 1980-November 30, 1980

    Energy Technology Data Exchange (ETDEWEB)

    1981-01-01

    The major activities at OOSI's Logan Wash site during the quarter were: mining the voids at all levels for Retorts 7 and 8; blasthole drilling; tracer testing MR4; conducting the start-up and burner tests on MR3; continuing the surface facility construction; and conducting Retorts 7 and 8 related Rock Fragmentation tests. Environmental monitoring continued during the quarter, and the data and analyses are discussed. Sandia National Laboratory and Laramie Energy Technology Center (LETC) personnel were active in the DOE support of the MR3 burner and start-up tests. In the last section of this report the final oil inventory for Retort 6 production is detailed. The total oil produced by Retort 6 was 55,696 barrels.

  2. Thermal processing of foods: control and automation

    National Research Council Canada - National Science Library

    Sandeep, K. P

    2011-01-01

    .... In addition to validating new control systems, some food companies have started the more difficult task of validating legacy control systems that have been operating for a number of years on retorts or aseptic systems.Thermal Processing...

  3. 21 CFR 113.40 - Equipment and procedures.

    Science.gov (United States)

    2010-04-01

    ...—Overflow line. E1—Drain line. E2—Screens. F—Check valves. G—Line from hot water storage. H—Suction line and... retort during the venting period. Vents shall not be connected directly to a closed drain system. If the... drain. The vent shall be located in that portion of the retort opposite the steam inlet; for...

  4. Analysis of Paraho oil shale products and effluents: an example of the multi-technique approach

    Energy Technology Data Exchange (ETDEWEB)

    Fruchter, J. S.; Wilkerson, C. L.; Evans, J. C.; Sanders, R. W.

    1979-06-10

    Inorganic analysis of solid, liquid and gaseous samples from the Paraho Semiworks Retort was completed using a multitechnique approach. The data were statistically analyzed to determine both the precision of each method and to see how closely the various techniques compared. The data were also used to determine the redistribution of 31 trace and major elements in the various effluents, including the offgas for the Paraho Retort operating in the direct mode. The computed mass balances show that approximately 1% or greater fractions of the As, Co, Hg, N, Ni, S and Se are released during retorting and redistributed to the product shale oil, retort water or product offgas. The fraction for these seven elements ranged from almost 1% for Co and Ni to 50 to 60% for Hg and N. Approximately 20% of the S and 5% of the As and Se are released. The mass balance redistribution during retorting for Al, Fe, Mg, V and Zn was observed to be no greater than .05%. These redistribution figures are generally in agreement with previous mass balance studies made for a limited number of elements on laboratory or smaller scale pilot retorts. 7 tables.

  5. Effect of combination processing on the microbial, chemical and sensory quality of ready-to-eat (RTE) vegetable pulav

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, R., E-mail: kumardfrl@gmail.com [Defence Food Research Laboratory, Mysore, Karnataka 570011 (India); George, Johnsy; Rajamanickam, R.; Nataraju, S.; Sabhapathy, S.N.; Bawa, A.S. [Defence Food Research Laboratory, Mysore, Karnataka 570011 (India)

    2011-12-15

    Effect of irradiation in combination with retort processing on the shelf life and safety aspects of an ethnic Indian food product like vegetable pulav was investigated. Gamma irradiation of RTE vegetable pulav was carried out at different dosage rates with {sup 60}Co followed by retort processing. The combination processed samples were analysed for microbiological, chemical and sensory characteristics. Microbiological analysis indicated that irradiation in combination with retort processing has significantly reduced the microbial loads whereas the chemical and sensory analysis proved that this combination processing is effective in retaining the properties even after storage for one year at ambient conditions. The results also indicated that a minimum irradiation dosage at 4.0 kGy along with retort processing at an F{sub 0} value of 2.0 is needed to achieve the desired shelf life with improved organoleptic qualities. - Highlights: > A combination processing involving gamma irradiation and retort processing. > Combination processing reduced microbial loads. > Minimum dose of 4.0 kGy together with retort processing at F{sub 0}-2.0 is required to achieve commercial sterility.

  6. Comparison of the Acceptability of Various Oil Shale Processes

    Energy Technology Data Exchange (ETDEWEB)

    Burnham, A K; McConaghy, J R

    2006-03-11

    While oil shale has the potential to provide a substantial fraction of our nation's liquid fuels for many decades, cost and environmental acceptability are significant issues to be addressed. Lawrence Livermore National Laboratory (LLNL) examined a variety of oil shale processes between the mid 1960s and the mid 1990s, starting with retorting of rubble chimneys created from nuclear explosions [1] and ending with in-situ retorting of deep, large volumes of oil shale [2]. In between, it examined modified-in-situ combustion retorting of rubble blocks created by conventional mining and blasting [3,4], in-situ retorting by radio-frequency energy [5], aboveground combustion retorting [6], and aboveground processing by hot-solids recycle (HRS) [7,8]. This paper reviews various types of processes in both generic and specific forms and outlines some of the tradeoffs for large-scale development activities. Particular attention is given to hot-recycled-solids processes that maximize yield and minimize oil shale residence time during processing and true in-situ processes that generate oil over several years that is more similar to natural petroleum.

  7. Continuous sodium modification of nearly-eutectic aluminium alloys. Part II. Experimental studiem

    Directory of Open Access Journals (Sweden)

    Białobrzeski A.

    2007-01-01

    Full Text Available One of the possible means of continuous sodium modification of nearly-eutectic alloys may be continuous electrolysis of sodium compounds (salts, taking place directly in metal bath (in the crucible. For this process it is necessary to use a solid electrolyte conducting sodium ions. Under the effect of the applied direct current voltage, sodium salt placed in a retort made from the solid electrolyte undergoes dissociation, and next - electrolysis. The retort is immersed in liquid metal. The anode is sodium salt, at that temperature occurring in liquid state, connected to the direct current source through, e.g. a graphite electrode, while cathode is the liquid metal. Sodium ions formed during the sodium salt dissociation and electrolysis are transported through the wall of the solid electrolyte (the material of the retort and in contact with liquid alloy acting as a cathode, they are passing into atomic state, modifying the metal bath.

  8. Characterization of oil shale, isolated kerogen, and post-pyrolysis residues using advanced 13 solid-state nuclear magnetic resonance spectroscopy

    Science.gov (United States)

    Cao, Xiaoyan; Birdwell, Justin E.; Chappell, Mark A.; Li, Yuan; Pignatello, Joseph J.; Mao, Jingdong

    2013-01-01

    Characterization of oil shale kerogen and organic residues remaining in postpyrolysis spent shale is critical to the understanding of the oil generation process and approaches to dealing with issues related to spent shale. The chemical structure of organic matter in raw oil shale and spent shale samples was examined in this study using advanced solid-state 13C nuclear magnetic resonance (NMR) spectroscopy. Oil shale was collected from Mahogany zone outcrops in the Piceance Basin. Five samples were analyzed: (1) raw oil shale, (2) isolated kerogen, (3) oil shale extracted with chloroform, (4) oil shale retorted in an open system at 500°C to mimic surface retorting, and (5) oil shale retorted in a closed system at 360°C to simulate in-situ retorting. The NMR methods applied included quantitative direct polarization with magic-angle spinning at 13 kHz, cross polarization with total sideband suppression, dipolar dephasing, CHn selection, 13C chemical shift anisotropy filtering, and 1H-13C long-range recoupled dipolar dephasing. The NMR results showed that, relative to the raw oil shale, (1) bitumen extraction and kerogen isolation by demineralization removed some oxygen-containing and alkyl moieties; (2) unpyrolyzed samples had low aromatic condensation; (3) oil shale pyrolysis removed aliphatic moieties, leaving behind residues enriched in aromatic carbon; and (4) oil shale retorted in an open system at 500°C contained larger aromatic clusters and more protonated aromatic moieties than oil shale retorted in a closed system at 360°C, which contained more total aromatic carbon with a wide range of cluster sizes.

  9. Energy and technology review

    Energy Technology Data Exchange (ETDEWEB)

    1983-10-01

    Three review articles are presented. The first describes the Lawrence Livermore Laboratory role in the research and development of oil-shale retorting technology through its studies of the relevant chemical and physical processes, mathematical models, and new retorting concepts. Second is a discussion of investigation of properties of dense molecular fluids at high pressures and temperatures to improve understanding of high-explosive behavior, giant-planet structure, and hydrodynamic shock interactions. Third, by totally computerizing the triple-quadrupole mass spectrometer system, the laboratory has produced a general-purpose instrument of unrivaled speed, selectivity, and adaptability for the analysis and identification of trace organic constituents in complex chemical mixtures. (GHT)

  10. Paraho environmental data. Part I. Process characterization. Par II. Air quality. Part III. Water quality

    Energy Technology Data Exchange (ETDEWEB)

    Heistand, R.N.; Atwood, R.A.; Richardson, K.L.

    1980-06-01

    From 1973 to 1978, Development Engineering, Inc. (DEI), a subsidiary of Paraho Development Corporation, demostrated the Paraho technology for surface oil shale retorting at Anvil Points, Colorado. A considerable amount of environmentally-related research was also conducted. This body of data represents the most comprehensive environmental data base relating to surface retorting that is currently available. In order to make this information available, the DOE Office of Environment has undertaken to compile, assemble, and publish this environmental data. The compilation has been prepared by DEI. This report includes the process characterization, air quality, and water quality categories.

  11. "As a Shepherd Divideth His Sheep from the Goats": Does the Daily Spiritual Experiences Scale Encapsulate Separable Theistic and Civility Components?

    Science.gov (United States)

    Schuurmans-Stekhoven, James Benjamin

    2013-01-01

    Numerous studies suggest spirituality and subjective well-being (SWB) are positively associated. However, critics argue that popular spirituality instruments--including the Daily Spiritual Experiences Scale (DSES)--contain items that conflate religiosity/spirituality (R/S), prosociality and SWB. Advocates of the DSES retort that, despite this…

  12. Evaluation of Long-Term Migration Testing from Can Coatings into Food Simulants: Polyester Coatings.

    Science.gov (United States)

    Paseiro-Cerrato, Rafael; Noonan, Gregory O; Begley, Timothy H

    2016-03-23

    FDA guidance for food contact substances recommends that for food packaging intended for use at sterilized, high temperature processed, or retorted conditions, a migration test with a retort step at 121 °C for 2 h followed by a 10 day migration test at 40 °C should be performed. These conditions are in intended to simulate processing and long-term storage. However, can coatings may be in contact with food for years, and there are very few data evaluating if this short-term testing accurately simulates migration over extended time periods. A long-term migration test at 40 °C with retorted and non-retorted polyester cans using several food simulants (water, 3% acetic acid, 10% ethanol, 50% ethanol, and isooctane) was conducted to verify whether traditional migration testing protocols accurately predict migration from food contact materials used for extended time periods. Time points were from 1 day to 515 days. HPLC-MS/MS was used to analyze polyester monomers, and oligomer migration was monitored using HPLC-DAD/CAD and HPLC-MS. Concentrations of monomers and oligomers increased during the migration experiments, especially in ethanol food simulants. The data suggest that current FDA migration protocols may need to be modified to address changes in migrants as a result of long-term storage conditions.

  13. Environmental assessment: Geokinetics, Inc. oil shale research project, Uintah County, Utah

    Energy Technology Data Exchange (ETDEWEB)

    1979-12-01

    Geokinetics, Inc. (GKI) proposes to complete the remaining experimental program to develop the LOFRECO modified horizontal in situ oil shale retorting process. This Environmental Assessment Report addresses the impacts of the project, located in a remote area of east-central Utah, about 70 miles south of both Vernal and Roosevelt.

  14. 9 CFR 318.305 - Equipment and procedures for heat processing systems.

    Science.gov (United States)

    2010-01-01

    ... unauthorized speed changes of the conveyor shall be provided. For example, a lock or a notice from management... speed changes on retorts shall be provided. For example, a lock or a notice from management posted at or... as resistance temperature detectors, used in lieu of mercury-in-glass thermometers, shall meet known...

  15. 9 CFR 381.305 - Equipment and procedures for heat processing systems.

    Science.gov (United States)

    2010-01-01

    ... unauthorized speed changes of the conveyor shall be provided. For example, a lock or a notice from management... speed changes on retorts shall be provided. For example, a lock or a notice from management posted at or..., such as resistance temperature detectors, shall meet known, accurate standards for such devices when...

  16. Chemistry of oil shale

    Energy Technology Data Exchange (ETDEWEB)

    Iida, T.

    1974-01-01

    A review with several references covers the formation, distribution, and mining of oil shales of Fu-Shun colliery; retorting furnaces for oil shale; refining of crude shale oils; and components of oil from Fu-Shun oil shales including pyrolle, matrine, fatty acid anilides, 2,4,5-trimethylpyrrole, and middle-layer bases.

  17. 9 CFR 318.300 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE AGENCY... CERTIFICATION ENTRY INTO OFFICIAL ESTABLISHMENTS; REINSPECTION AND PREPARATION OF PRODUCTS Canning and Canned... emitted from the retort throughout the entire thermal process. (d) Canned product. A meat food...

  18. Western states enhanced oil shale recovery program: Shale oil production facilities conceptual design studies report

    Energy Technology Data Exchange (ETDEWEB)

    1989-08-01

    This report analyzes the economics of producing syncrude from oil shale combining underground and surface processing using Occidental's Modified-In-Situ (MIS) technology and Lawrence Livermore National Laboratory's (LLNL) Hot Recycled Solids (HRS) retort. These retorts form the basic technology employed for oil extraction from oil shale in this study. Results are presented for both Commercial and Pre-commercial programs. Also analyzed are Pre-commercialization cost of Demonstration and Pilot programs which will confirm the HRS and MIS concepts and their mechanical designs. These programs will provide experience with the circulating Fluidized Bed Combustor (CFBC), the MIS retort, the HRS retort and establish environmental control parameters. Four cases are considered: commercial size plant, demonstration size plant, demonstration size plant minimum CFBC, and a pilot size plant. Budget cost estimates and schedules are determined. Process flow schemes and basic heat and material balances are determined for the HRS system. Results consist of summaries of major equipment sizes, capital cost estimates, operating cost estimates and economic analyses. 35 figs., 35 tabs.

  19. Simplifying pyrolysis; using gasification to produce corn stover and wheat straw biochar for sorptive and horitcultural media

    Science.gov (United States)

    Biochar is a renewable, useful material that can be utilized in many different applications. Biochar is commonly produced via pyrolysis methods using a retort-style oven with inert gas. Gasification is another method that can utilize pyrolysis to produce biochar, but with the advantage of not requir...

  20. transforming nigeria's economy on the path of sustainable ...

    African Journals Online (AJOL)

    SILKA

    Though all these, including the contemporary security challenges are .... America, China, India, United Kingdom, Netherlands, France, Germany, Brazil .... retorted during a media chart, that the whole exercise was facing the problems of lack of .... one may not overlook the massive economic trickle down effect in relation to ...

  1. Paraho oil shale project. [Coloardo

    Energy Technology Data Exchange (ETDEWEB)

    Pforzheimer, H.

    1976-01-01

    The Paraho Oil Shale Project is a privately financed program to prove the Paraho retorting process and hardware on oil shale at Anvil Points, Colo., near Rifle. The project was launched in late 1973 under the sponsorship of 17 participants many of whom were active in earlier oil shale research. Two new Paraho retorts, a pilot and a semiworks size unit, were installed at Anvil Points. The oil-shale mine on the adjacent Naval Oil Shale Reserve was reactivated. The mine and new retorts were put into operation during 1974. The pilot plant is used to explore operating parameters in order to define conditions for testing in the larger semiworks size retort. The experimental operations in 1974 set the stage for the successful runs in 1975 and early 1976. The results of the Paraho operations to date have been encouraging. They demonstrate that the process works, that the equipment is durable, and that both are environmentally acceptable on a pilot and a semiworks plant scale.

  2. Feasibility of Rectangular Concrete Pressure Vessels for Human Occupancy

    Science.gov (United States)

    1990-07-01

    initial prestressing must be sufficient to produce a resultant compressive preloadin the concrete after time dependent effects of creep in the concrete... silage . Bridge and skyscraper applications of prestressed concrete followed thereafter. Today prestressed concrete is widely used in civil engineering...for large pressurized concrete cylinders for coal gasification plants. Large high pressure, high temperature retorts were needed to convert coal into

  3. Revegetation research on oil shale lands in the Piceance Basin

    Energy Technology Data Exchange (ETDEWEB)

    Redente, E.F.; Cook, C.W.

    1981-02-01

    The overall objective of this project is to study the effects of various reclamation practices on above- and belowground ecosystem development associated with disturbed oil shale lands in northwestern Colorado. Plant growth media that are being used in field test plots include retorted shale, soil over retorted shale, subsoil materials, and surface disturbed topsoils. Satisfactory stands of vegetation failed to establish on unleached retorted shale during two successive years of seeding. All seedings with soil over retorted shale were judged to be successful at the end of three growing seasons, but deep-rooted shrubs that depend upon subsoil moisture may have their growth hampered by the retorted shale substrate. Natural revegetation on areas with various degrees of disturbance shows that natural invasion and succession was slow at best. Invasion of species on disturbed topsoil plots showed that after three years introduced seed mixtures were more effective than native mixtures in occupying space and closing the community to invading species. Fertilizer appears to encourage the invasion of annual plants even after the third year following application. Long-term storage of topsoil without vegetation significantly decreases the mycorrhizal infection potential and, therefore, decreases the relative success of aboveground vegetation and subsequent succession. Ecotypic differentation related to growth and competitive ability, moisture stress tolerance, and reproductive potential have been found in five native shrub species. Germplasm sources of two grasses and two legumes, that have shown promise as revegetation species, have been collected and evaluated for the production of test seed. Fertilizer (nitrogen) when added to the soil at the time of planting may encourage competition from annual weeds to the detriment of seeded species.

  4. The Pidgeon Process in China and Its Future

    Science.gov (United States)

    Zang, Jing Chun; Ding, Weinan

    Magnesium production in China has been growing steadily over the past 10 years. Most of the metal has been produced by the Pidgeon process. This process uses horizontal steel tubes called retorts, in furnaces and under vacuum. In the retorts mixtures of finely ground calcined dolomite and ferrosilicon formed into briquettes react to form magnesium vapors which are condensed and later remelted into ingots. The Pidgeon process was long thought to be uneconomic and obsolete. The Chinese have used the advantages of excellent raw material, location, large skilled labor supply, and low capital costs to produce magnesium by this process. The Chinese magnesium is being sold at the lowest prices in the world and lower than aluminum on a pound for pound basis.

  5. Closed Process of Shale Oil Recovery from Circulating Washing Water by Hydrocyclones

    Directory of Open Access Journals (Sweden)

    Yuan Huang

    2016-12-01

    Full Text Available The conventional oil recovery system in the Fushun oil shale retorting plant has a low oil recovery rate. A large quantity of fresh water is used in the system, thereby consuming a considerable amount of water and energy, as well as polluting the environment. This study aims to develop a closed process of shale oil recovery from the circulating washing water for the Fushun oil shale retorting plant. The process would increase oil yield and result in clean production. In this process, oil/water hydrocyclone groups were applied to decrease the oil content in circulating water and to simultaneously increase oil yield. The oil sludge was removed by the solid/liquid hydrocyclone groups effectively, thereby proving the smooth operation of the devices and pipes. As a result, the oil recovery rate has increased by 5.3 %, which corresponds to 230 tonnes a month.

  6. Contributions in petroleum geology and engineering

    Energy Technology Data Exchange (ETDEWEB)

    1989-01-01

    This book provides a discussion of Petroleum Reservoir Analysis. Contents include: Introduction to laboratory equipment and procedures. Fluid saturation of hydrocarbon reservoir rocks by the distillation extraction and Dean Stark procedures. Fluid saturation of hydrocarbon reservoir rocks by retort method (atmospheric distillation). Fluid saturation of hydrocarbon reservoir rocks by temperature retorting analysis. Fluid saturation of hydrocarbon reservoir rocks by vacuum distillation method. Effective porosity by Barnes and modified Barnes method. Effective porosity determination by the mercury injection and Kobe methods. Effective porosity determination by the mercury injection and Kobe methods. Effective porosity determination by use of the helium porosimeter. Total porosity and grain density determination. Absolute air permeability with correction for Klinkenberg effect. Absolute liquid permeability. Liquid viscosity by use of a falling ball viscometer. Surface and interfacial tension measurement. Capillary pressure determination.

  7. Nutritional Composition of Australian Combat Ration Packs and Options for Improvement

    Science.gov (United States)

    2013-10-01

    12]. In Australia, for example, the fortification of bread-making flour with thiamin, folate and iodine is mandatory [13]. It is important that CRP...by other high protein products, resulting in very low overall protein content. The research has found the meat content of some meat based, retort...folate provides against serious birth defects, the mandatory fortification of wheat flour for bread-making was introduced in Australia in 2009 [20

  8. Migration of melamine from thermally cured, amino cross-linked can coatings into an aqueous ethanol food simulant: aspects of hydrolysis, relative reactivity and migration.

    Science.gov (United States)

    Magami, Saminu M; Oldring, Peter K T; Castle, Laurence; Guthrie, James T

    2015-01-01

    Aspects of melamine migration from epoxy-based coatings into a food simulant were studied. Four commercial amino-based cross linkers were incorporated into an epoxy anhydride coating system and into an epoxy phenolic coating system. The epoxy-based coatings were formulated, applied, cured and tested for migration by retorting in contact with the food simulant, 10% ethanol, at 131°C. The commercial melamino-based cross linkers used and the model coatings that were prepared using these cross linkers contained very low or non-detectable levels of free melamine. However, during retorting, the migration of melamine from the coatings increased as the retorting time was increased. This migration process is not the more classical diffusional process but rather the result of chemical attack (hydrolysis) of the coating. For these model can coatings, a substantial fraction of the melamino cross linker was hydrolysed although, curiously, the essential functional properties of the coating are retained. In all cases, for these model systems the migration of melamine was rather low because the cross linkers are used commercially in only small amounts - typically 1-2% of the dry film weight of the coatings. For the standard retorting conditions of 1 h, migration of melamine was up to 0.4 mg kg(-1), depending on the cross linker used. The cross linker that contained the methylol functionality (-CH₂OH group) gave rise to less melamine than did the alkylated cross linkers (methylated and butylated, -OCHv and -O(CH₂)₃CH₃, respectively). This observation could prove useful in formulating coatings with even lower melamine release characteristics.

  9. Canning Tests on Mushroom Strain

    OpenAIRE

    Gormley, T. R. (Thomas Ronan); MacCanna, C.

    1980-01-01

    Canning tests were carried out on 5 mushroom strains from 2 flushes of 4 separate crops. Particular attention was given to the ratio of whole closed canned mushrooms to that of whole closed canned mushrooms plus canned stems and pieces - i.e. total yield. Factors considered in the tests included grading prior to processing, blanching and retort losses, shrinkage in size and mushroom whiteness. Cream and off-white strains had the highest level of open and misshapen mushrooms prior to processin...

  10. Spatial and stratigraphic distribution of water in oil shale of the Green River Formation using Fischer assay, Piceance Basin, northwestern Colorado

    Science.gov (United States)

    Johnson, Ronald C.; Mercier, Tracey J.; Brownfield, Michael E.

    2014-01-01

    The spatial and stratigraphic distribution of water in oil shale of the Eocene Green River Formation in the Piceance Basin of northwestern Colorado was studied in detail using some 321,000 Fischer assay analyses in the U.S. Geological Survey oil-shale database. The oil-shale section was subdivided into 17 roughly time-stratigraphic intervals, and the distribution of water in each interval was assessed separately. This study was conducted in part to determine whether water produced during retorting of oil shale could provide a significant amount of the water needed for an oil-shale industry. Recent estimates of water requirements vary from 1 to 10 barrels of water per barrel of oil produced, depending on the type of retort process used. Sources of water in Green River oil shale include (1) free water within clay minerals; (2) water from the hydrated minerals nahcolite (NaHCO3), dawsonite (NaAl(OH)2CO3), and analcime (NaAlSi2O6.H20); and (3) minor water produced from the breakdown of organic matter in oil shale during retorting. The amounts represented by each of these sources vary both stratigraphically and areally within the basin. Clay is the most important source of water in the lower part of the oil-shale interval and in many basin-margin areas. Nahcolite and dawsonite are the dominant sources of water in the oil-shale and saline-mineral depocenter, and analcime is important in the upper part of the formation. Organic matter does not appear to be a major source of water. The ratio of water to oil generated with retorting is significantly less than 1:1 for most areas of the basin and for most stratigraphic intervals; thus water within oil shale can provide only a fraction of the water needed for an oil-shale industry.

  11. The Jurema tree (Mimosa hostilis) as an energy source for the Brazilian arid northeast region; A Jurema preta (Mimosa hostilis, Benth) como fonte energetica do semi-arido do nordeste-carvao

    Energy Technology Data Exchange (ETDEWEB)

    Faria, Washington Luiz Fonseca

    1984-12-31

    This study was carried out to evaluate the charcoal production using `Jurema` wood and also to determine its potential as an alternative energy source for Paraiba state, northeast Brazil. Charcoal was produced in a laboratory electrical retort at temperatures of 400, 550 and 700 deg C. The following properties were analyzed: yield (condensed liquids and non-condensable gases), superior calorific value, specific gravity, volatile materials, fixed carbon and ash content. (author). 18 figs., 17 tabs., 47 refs

  12. Software packages for food engineering needs

    OpenAIRE

    Abakarov, Alik

    2011-01-01

    The graphic user interface (GUI) software packages “ANNEKs” and “OPT-PROx” are developed to meet food engineering needs. “OPT-RROx” (OPTimal PROfile) is software developed to carry out thermal food processing optimization based on the variable retort temperature processing and global optimization technique. “ANNEKs” (Artificial Neural Network Enzyme Kinetics) is software designed for determining the kinetics of enzyme hydrolysis of protein at different initial reaction parameters based on the...

  13. Flow of products of thermal decomposition of oil shale through porous skeleton

    Science.gov (United States)

    Knyazeva, A. G.; Maslov, A. L.

    2016-11-01

    Oil shale is sedimentary rock formed by the accumulation of pelagic sediments, minerals and their further transformation. Experimental investigation of shale decomposition is very complex and expensive. The model of underground oil shale retorting is formulated in this paper. Model takes into account the reactions in solid phase and in fluid, mass and heat exchange, gaseous product flow in pores. Example of the numerical solution of the developed system of equations for the particular problem is shown.

  14. Composition and Variation of Macronutrients, Immune Proteins, and Human Milk Oligosaccharides in Human Milk From Nonprofit and Commercial Milk Banks.

    Science.gov (United States)

    Meredith-Dennis, Laura; Xu, Gege; Goonatilleke, Elisha; Lebrilla, Carlito B; Underwood, Mark A; Smilowitz, Jennifer T

    2017-06-01

    When human milk is unavailable, banked milk is recommended for feeding premature infants. Milk banks use processes to eliminate pathogens; however, variability among methods exists. Research aim: The aim of this study was to compare the macronutrient (protein, carbohydrate, fat, energy), immune-protective protein, and human milk oligosaccharide (HMO) content of human milk from three independent milk banks that use pasteurization (Holder vs. vat techniques) or retort sterilization. Randomly acquired human milk samples from three different milk banks ( n = 3 from each bank) were analyzed for macronutrient concentrations using a Fourier transform mid-infrared spectroscopy human milk analyzer. The concentrations of IgA, IgM, IgG, lactoferrin, lysozyme, α-lactalbumin, α antitrypsin, casein, and HMO were analyzed by mass spectrometry. The concentrations of protein and fat were significantly ( p milk samples that had undergone retort sterilization had significantly less immune-protective proteins and total and specific HMOs compared with samples that had undergone Holder and vat pasteurization. These data suggest that further analysis of the effect of retort sterilization on human milk components is needed prior to widespread adoption of this process.

  15. Metal coordination chemistry: removal and recovery of metal compounds from heavy crude and shale oils with multidentate ligands. Annual report, October 1981-October 1982

    Energy Technology Data Exchange (ETDEWEB)

    Fish, R.H.

    1982-01-01

    The separation and identification by HPLC-GFAA analysis of organic and organoarsenic compounds occurring in oil shale retort and process waters, shale oils and Green River Formation oil shale are described in this report. The molecular characterization of these compounds has given new insight into developing innovative methods for their removal from oil shale retorting products. Catechol (1,2-dihydrocylbenzene) derivatives of both inorganic and organoarsenic compounds may in fact provide the means by which these compounds can be successfully removed from the above mentioned retort products. In addition to model compounds experiments with catechols and characterized inorganic arsenic and organoarsenic compounds, we have also synthesized a polymer that was modified with catechol and are in the process of determining its reactivity with the characterized arsenic compounds. Progress in preparing these catechol-bonded polymers is discussed. In a complimentary study, we have performed molecular characterizations and profile identifications of vanadyl porphyrin and non-porphyrin complexes in various heavy crude petroleums and their asphaltenes by HPLC-GFAA analysis. Results are discussed. (DMC)

  16. Isotopic variability of mercury in ore, mine-waste calcine, and leachates of mine-waste calcine from areas mined for mercury.

    Science.gov (United States)

    Stetson, Sarah J; Gray, John E; Wanty, Richard B; Macalady, Donald L

    2009-10-01

    The isotopic composition of mercury (Hg) was determined in cinnabar ore, mine-waste calcine (retorted ore), and leachates obtained from water leaching experiments of calcine from two large Hg mining districts in the U.S. This study is the first to report significant mass-dependent Hg isotopic fractionation between cinnabar ore and resultant calcine. Data indicate that delta202Hg values relative to NIST 3133 of calcine (up to 1.52 per thousand) in the Terlingua district, Texas, are as much as 3.24 per thousand heavier than cinnabar (-1.72 per thousand) prior to retorting. In addition, delta202Hg values obtained from leachates of Terlingua district calcines are isotopically similar to, or as much as 1.17 per thousand heavier than associated calcines, most likely due to leaching of soluble, byproduct Hg compounds formed during ore retorting that are a minor component in the calcines. As a result of the large fractionation found between cinnabar and calcine, and because calcine is the dominant source of Hg contamination from the mines studied, delta202Hg values of calcine may be more environmentally important in these mined areas than the primary cinnabar ore. Measurement of the Hg isotopic composition of calcine is necessary when using Hg isotopes for tracing Hg sources from areas mined for Hg, especially mine water runoff.

  17. Effect of salmon type and presence/absence of bone on color, sensory characteristics, and consumer acceptability of pureed and chunked infant food products.

    Science.gov (United States)

    DeSantos, F A; Ramamoorthi, L; Bechtel, P; Smiley, S; Brewer, M S

    2010-08-01

    Salmon-based infant food (puree) and toddler food (puree plus chunks) were manufactured from pink salmon, with and without bone, and from Sockeye salmon, with and without bone, to contain 45% salmon, 55% water, and 5% starch. Products were retort processed at 118 to 121 degrees C for 55 min in a steam-jacketed still retort. A trained descriptive panel (n = 7) evaluated infant and toddler foods separately. Instrumental color, pH, and water activity were also determined. Infant and toddler foods were also evaluated by a consumer panel (n = 104) of parents for product acceptability. During the manufacturing process (cooking, homogenization, retort processing), salmon infant food from pink salmon lost much of its characteristic pink color while that from sockeye salmon retained a greater amount. Bitterness was more evident in samples with bones. In the toddler food formulation containing chunks, the odor and flavor characteristics were influenced primarily by the type of salmon. The presence of bone affected visual pink color and lightness, and salmon odor only. Consumers scored products made with sockeye salmon as more acceptable despite the fact that they had more off-flavor than products from pink salmon. The appearance and thickness of the pureed infant food was more acceptable than the toddler food with chunks despite the chunky toddler product having more acceptable salmon flavor. This indicates that the color and appearance of the prototypes were the main drivers for liking. Of the total number of parents surveyed, 73% would feed this salmon product to their children.

  18. High-pressure thermal sterilization: food safety and food quality of baby food puree.

    Science.gov (United States)

    Sevenich, Robert; Kleinstueck, Elke; Crews, Colin; Anderson, Warwick; Pye, Celine; Riddellova, Katerina; Hradecky, Jaromir; Moravcova, Eliska; Reineke, Kai; Knorr, Dietrich

    2014-02-01

    The benefits that high-pressure thermal sterilization offers as an emerging technology could be used to produce a better overall food quality. Due to shorter dwell times and lower thermal load applied to the product in comparison to the thermal retorting, lower numbers and quantities of unwanted food processing contaminants (FPCs), for example, furan, acrylamide, HMF, and MCPD-esters could be formed. Two spore strains were used to test the technique; Geobacillus stearothermophilus and Bacillus amyloliquefaciens, over the temperature range 90 to 121 °C at 600 MPa. The treatments were carried out in baby food puree and ACES-buffer. The treatments at 90 and 105 °C showed that G. stearothermophilus is more pressure-sensitive than B. amyloliquefaciens. The formation of FPCs was monitored during the sterilization process and compared to the amounts found in retorted samples of the same food. The amounts of furan could be reduced between 81% to 96% in comparison to retorting for the tested temperature pressure combination even at sterilization conditions of F₀-value in 7 min.

  19. Potential small-scale development of western oil shale

    Energy Technology Data Exchange (ETDEWEB)

    Smith, V.; Renk, R.; Nordin, J.; Chatwin, T.; Harnsberger, M.; Fahy, L.J.; Cha, C.Y.; Smith, E.; Robertson, R.

    1989-10-01

    Several studies have been undertaken in an effort to determine ways to enhance development of western oil shale under current market conditions for energy resources. This study includes a review of the commercial potential of western oil shale products and byproducts, a review of retorting processes, an economic evaluation of a small-scale commercial operation, and a description of the environmental requirements of such an operation. Shale oil used as a blend in conventional asphalt appears to have the most potential for entering today's market. Based on present prices for conventional petroleum, other products from oil shale do not appear competitive at this time or will require considerable marketing to establish a position in the marketplace. Other uses for oil shale and spent shale, such as for sulfur sorbtion, power generation, cement, aggregate, and soil stabilization, are limited economically by transportation costs. The three-state area area consisting of Colorado, Utah, and Wyoming seems reasonable for the entry of shale oil-blended asphalt into the commercial market. From a review of retorting technologies and the product characteristics from various retorting processes it was determined that the direct heating Paraho and inclined fluidized-bed processes produce a high proportion of heavy material with a high nitrogen content. The two processes are complementary in that they are each best suited to processing different size ranges of materials. An economic evaluation of a 2000-b/d shale oil facility shows that the operation is potentially viable, if the price obtained for the shale oil residue is in the top range of prices projected for this product. Environmental requirements for building and operating an oil shale processing facility are concerned with permitting, control of emissions and discharges, and monitoring. 62 refs., 6 figs., 10 tabs.

  20. Comprehensive database of Manufactured Gas Plant tars. Part A. Database.

    Science.gov (United States)

    Gallacher, Christopher; Thomas, Russell; Lord, Richard; Kalin, Robert M; Taylor, Chris

    2017-08-15

    Coal tars are a mixture of organic and inorganic compounds that were by-products from the manufactured gas and coke making industries. Different manufacturing processes have resulted in the production of distinctly different tar compositions. This study presents a comprehensive database of compounds produced using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS), analysing 16 tar samples produced by five distinct production processes. Samples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatised post-extraction using N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) with 1% trimethylchlorosilane (TMCS). The derivatised samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS). A total of 16 tar samples originating from five different production processes: Low Temperature Horizontal Retorts, Horizontal Retorts, Vertical Retorts, Carbureted Water Gas and Coke Ovens, were analysed. A total of 2369 unique compounds were detected with 948 aromatic compounds, 196 aliphatic compounds, 380 sulfur-containing compounds, 209 oxygen-containing compounds, 262 nitrogen-containing compounds and 15 mixed heterocycles. Derivatisation allowed the detection of 359 unique compounds, the majority in the form of hydroxylated polycyclic aromatic hydrocarbons, many of which would not have been detected without derivatisation. Of the 2369 unique compounds detected, 173 were found to be present within all samples. A unique comprehensive database of compounds detected within 16 tar samples from five different production processes was produced. The 173 compounds identified within every sample may be of particular importance from a regulatory standpoint. This initial study indicates that different production processes produce tars with different chemical signatures and it can be further expanded upon by in-depth analysis of the different compound

  1. Western Research Institute: Annual technical progress report, October 1986--September 1987

    Energy Technology Data Exchange (ETDEWEB)

    1987-10-01

    Accomplishments for the year are presented for the following five areas of research: oil shale, tar sand, underground coal gasification, advanced process technology, and advanced fuel research. Oil shale research covers: chemical and physical characterization of reference shales; oil shale retorting studies; and environmental base studies for oil shale. Tar sand covers: reference resource (tar sand deposits) evaluation; chemical and physical propeerties of reference tar sand; recovery processes; mathematical modeling; product evaluation; and environmental base studies. Underground coal gasification covers environmental impact assessment and groundwater impact mitigation. Advanced process technology includes advanced process analysis (contaminant control and new technology) and advanced mitigation concepts. Advanced fuels research is on jet fuels from coal. (AT).

  2. Utilization of non-merchantable wood in Steppe regions

    Energy Technology Data Exchange (ETDEWEB)

    Dobrovol' skil, E.Ya.

    1979-01-01

    A description, with diagram, is given of the design of a small mobile retort developed in the USSR for pyrolysis of unmerchantable wood in the steppe regions. The type of wood considered is the tree and shrub material in shelterbelts, e.g. Cornus sanguinea, Elaeagnus angustifolia, Ribes aureum, Cotinus coggygria (Rhus continus) and Caragana arborescens. Yields of charcoal, settled tar, alcohols, and volatile acids from each of these species are given in % of oven-dry wood for pyrolysis at 320/sup 0/C for 2 h. Comparative data are given for dry distillation of wood of birch, spruce, and pine (400/sup 0/C, 8 h).

  3. Development and Evaluation of Integrity Assessment Tests for Polymeric Hermetic Seals

    Science.gov (United States)

    2006-02-19

    inoculated) 5 samples Total Polytrays 80 Microorganism Washes 1. Prepare Cultures of Enterobacter aerogenes a. 5 tubes (10 mL each) in...initial number – 6 log CFU/mL a. Add two tubes (20 mL) of Enterobacter aerogenes culture to 5 gallons of water with sodium thiosulfate b. Ca. 9 log CFU... Enterobacter aerogenes bucket to 5 gallon water with thiosulfate b. 1.06 x 108 CFU/18,925 mL – 5.6 x 103 CFU/mL 7. Dip all retorted polytrays for 2

  4. Gas Warfare in World War I. The Use of Gas in the Meuse-Argonne Campaign, September-November 1918

    Science.gov (United States)

    1958-12-01

    ERIBULLES-our-MEUSE-CUNEL, the Vth Corps the heights in BOIS de GESNES , BOIS do MONCY and the METIT BOIS, and the lt Corps the FORE? D’ ARGONNE to include...use in Le Petit Bois, Bois do Gesnes , Bois do Moncy, and the Argonne that night and the next day. The next evening the Aire Gpg retorted that none of...October, the left and center corps made slight gains, reaching Apremont, Exermont, and Gesnes , but the right corps, "hampered by the German flanking

  5. Oil shale program. Eighteenth quarterly report, April 1980-June 1980

    Energy Technology Data Exchange (ETDEWEB)

    Stevens, A. L. [ed.

    1980-11-01

    Instrumentation and evaluation activities are in progress at two DOE-supported in situ oil shale field projects, namely, the Geokinetics Oil Shale Project near Vernal, Utah, and the Occidental Oil Shale Project near DeBeque, Colorado. In support of these projects, it is necessary to develop new and advanced instrumentation systems and associated deployment, recording and analysis techniques that are unique to the field project needs. A rock mechanics program provides material properties, material response models and computational methods for use in the design analysis, and evaluation functions. In addition, retorting studies are in progress on problems unique to the low void conditions encountered in field experiments.

  6. Shrinkage in canned mushrooms treated with xanthan gum as a pre-blanch soak treatment

    OpenAIRE

    Gormley, T. R. (Thomas Ronan)

    1986-01-01

    Vacuum treating freshly harvested mushrooms with a 1 % xanthan gum solution (XVT)containing 0.25% sodium metabisulphite{SMBS) prior to blanching and canning gave a lower shrinkage value than for corresponding samples vacuum treated with water, or those canned by conventional means or the 3S process. A combination of chill storage (2-4°C) for 1-3 days coupled with 1 % XVT was found best and gave even lower total canning losses (chill storage loss+blanch loss+retort loss); these were6% lower th...

  7. OIL SHALE ASH UTILIZATION IN INDUSTRIAL PROCESSES AS AN ALTERNATIVE RAW MATERIAL

    OpenAIRE

    Azeez Mohamed, Hussain; Campos, Leonel

    2016-01-01

    Oil shale is a fine-grained sedimentary rock with the potential to yield significant amounts of oil and combustible gas when retorted. Oil shale deposits have been found on almost every continent, but only Estonia, who has the 8th largest oil shale deposit in the world has continuously utilized oil shale in large scale operations. Worldwide, Estonia accounts for 80% of the overall activity involving oil shale, consuming approximately 18 million tons while producing 5–7 million tons of oil sha...

  8. Închisoarea federală Oz - Un model de reprezentare mediatică a comunicării în grupurile din instituțiile închise

    Directory of Open Access Journals (Sweden)

    George ANGHELCEV

    2002-06-01

    Full Text Available The article seeks to explore the particular features of group communication networks and processes in the media-created environment of Oz, The Federal Prison. Specific characteristics of the OZ groups, their members, internal and external group pressures, distribution of status and group formation are analyzed by retorting to group communication theories and the pioneering work of American sociologist Ervin Goffman on prisons as total institutions. The analysis applies theorethical concepts to individual characters and actual contexts depicted throughout the series.

  9. SPOUTED BED DESIGN CONSIDERATIONS FOR COATED NUCLEAR FUEL PARTICLES

    Energy Technology Data Exchange (ETDEWEB)

    Marshall, Douglas W.

    2017-07-01

    High Temperature Gas Cooled Reactors (HTGRs) are fueled with tristructural isotropic (TRISO) coated nuclear fuel particles embedded in a carbon-graphite fuel body. TRISO coatings consist of four layers of pyrolytic carbon and silicon carbide that are deposited on uranium ceramic fuel kernels (350µm – 500µm diameters) in a concatenated series of batch depositions. Each layer has dedicated functions such that the finished fuel particle has its own integral containment to minimize and control the release of fission products into the fuel body and reactor core. The TRISO coatings are the primary containment structure in the HTGR reactor and must have very high uniformity and integrity. To ensure high quality TRISO coatings, the four layers are deposited by chemical vapor deposition (CVD) using high purity precursors and are applied in a concatenated succession of batch operations before the finished product is unloaded from the coating furnace. These depositions take place at temperatures ranging from 1230°C to 1550°C and use three different gas compositions, while the fuel particle diameters double, their density drops from 11.1 g/cm3 to 3.0 g/cm3, and the bed volume increases more than 8-fold. All this is accomplished without the aid of sight ports or internal instrumentation that could cause chemical contamination within the layers or mechanical damage to thin layers in the early stages of each layer deposition. The converging section of the furnace retort was specifically designed to prevent bed stagnation that would lead to unacceptably high defect fractions and facilitate bed circulation to avoid large variability in coating layer dimensions and properties. The gas injection nozzle was designed to protect precursor gases from becoming overheated prior to injection, to induce bed spouting and preclude bed stagnation in the bottom of the retort. Furthermore, the retort and injection nozzle designs minimize buildup of pyrocarbon and silicon carbide on the

  10. The role of water in unconventional in situ energy resource extraction technologies: Chapter 7 in Food, energy, and water: The chemistry connection

    Science.gov (United States)

    Gallegos, Tanya J.; Bern, Carleton R.; Birdwell, Justin E.; Haines, Seth S.; Engle, Mark A.

    2015-01-01

    Global trends toward developing new energy resources from lower grade, larger tonnage deposits that are not generally accessible using “conventional” extraction methods involve variations of subsurface in situ extraction techniques including in situ oil-shale retorting, hydraulic fracturing of petroleum reservoirs, and in situ recovery (ISR) of uranium. Although these methods are economically feasible and perhaps result in a smaller above-ground land-use footprint, there remain uncertainties regarding potential subsurface impacts to groundwater. This chapter provides an overview of the role of water in these technologies and the opportunities and challenges for water reuse and recycling.

  11. Application of transfer functions to canned tuna fish thermal processing.

    Science.gov (United States)

    Ansorena, M R; del Valle, C; Salvadori, V O

    2010-02-01

    Design and optimization of thermal processing of foods need accurate dynamic models to ensure safe and high quality food products. Transfer functions had been demonstrated to be a useful tool to predict thermal histories, especially under variable operating conditions. This work presents the development and experimental validation of a dynamic model (discrete transfer function) for the thermal processing of tuna fish in steam retorts. Transfer function coefficients were obtained numerically, using commercial software of finite elements (COMSOL Multiphysics) to solve the heat transfer balance. Dependence of transfer function coefficients on the characteristic dimensions of cylindrical containers (diameter and height) and on the sampling interval is reported. A simple equation, with two empirical parameters that depends on the container dimensions, represented the behavior of transfer function coefficients with very high accuracy. Experimental runs with different size containers and different external conditions (constant and variable retort temperature) were carried out to validate the developed methodology. Performance of the thermal process simulation was tested for predicting internal product temperature of the cold point and lethality and very satisfactory results were found. The developed methodology can play an important role in reducing the computational effort while guaranteeing accuracy by simplifying the calculus involved in the solution of heat balances with variable external conditions and emerges as a potential approach to the implementation of new food control strategies leading not only to more efficient processes but also to product quality and safety.

  12. Mercury speciation in the Mt. Amiata mining district (Italy): interplay between urban activities and mercury contamination

    Science.gov (United States)

    Rimondi, Valentina; Bardelli, Fabrizio; Benvenuti, Marco; Costagliola, Pilario; Gray, John E.; Lattanzi, Pierfranco

    2014-01-01

    A fundamental step to evaluate the biogeochemical and eco-toxicological significance of Hg dispersion in the environment is to determine speciation of Hg in solid matrices. In this study, several analytical techniques such as scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), sequential chemical extractions (SCEs), and X-ray absorption spectroscopy (XANES) were used to identify Hg compounds and Hg speciation in samples collected from the Mt. Amiata Hg mining district, southern Tuscany, Italy. Different geological materials, such as mine waste calcine (retorted ore), soil, stream sediment, and stream water suspended particulate matter were analyzed. Results show that the samples were generally composed of highly insoluble Hg compounds such as sulphides (HgS, cinnabar and metacinnabar), and more soluble Hg halides such as those associated with the mosesite group. Other moderately soluble Hg compounds, HgCl2, HgO and Hg0, were also identified in stream sediments draining the mining area. The presence of these minerals suggests active and continuous runoff of soluble Hg compounds from calcines, where such Hg compounds form during retorting, or later in secondary processes. Specifically, we suggest that, due to the proximity of Hg mines to the urban center of Abbadia San Salvatore, the influence of other anthropogenic activities was a key factor for Hg speciation, resulting in the formation of unusual Hg-minerals such as mosesite.

  13. Converting oil shale to liquid fuels: energy inputs and greenhouse gas emissions of the Shell in situ conversion process.

    Science.gov (United States)

    Brandt, Adam R

    2008-10-01

    Oil shale is a sedimentary rock that contains kerogen, a fossil organic material. Kerogen can be heated to produce oil and gas (retorted). This has traditionally been a CO2-intensive process. In this paper, the Shell in situ conversion process (ICP), which is a novel method of retorting oil shale in place, is analyzed. The ICP utilizes electricity to heat the underground shale over a period of 2 years. Hydrocarbons are produced using conventional oil production techniques, leaving shale oil coke within the formation. The energy inputs and outputs from the ICP, as applied to oil shales of the Green River formation, are modeled. Using these energy inputs, the greenhouse gas (GHG) emissions from the ICP are calculated and are compared to emissions from conventional petroleum. Energy outputs (as refined liquid fuel) are 1.2-1.6 times greater than the total primary energy inputs to the process. In the absence of capturing CO2 generated from electricity produced to fuel the process, well-to-pump GHG emissions are in the range of 30.6-37.1 grams of carbon equivalent per megajoule of liquid fuel produced. These full-fuel-cycle emissions are 21%-47% larger than those from conventionally produced petroleum-based fuels.

  14. 提高蒸馏醪液预热温度的研究%Improvement of Distilled Mash Preheat Temperature

    Institute of Scientific and Technical Information of China (English)

    郭传广; 何松贵; 卫云路

    2016-01-01

    In order to improve the distillation efficiency, reduce energy consumption through the transformation of existing retort, increasing the heat transfer area of the heat exchanger, so be distilled mash temperature than the original improved 45.3%, 7.5 single retort distillation save time min, to achieve annual savings of 7.26%of steam. Further, the test vegetarian tasting that wine quality, to improve the preheating temperature of the mash vegetarian wine quality has little effect on stability vegetarian wine quality.%为了提高蒸馏效率,降低能耗,通过对现有蒸馏甑进行改造,增大了换热器的换热面积,使得待蒸馏的醪液温度较原来的提升了45.3%,单甑蒸馏节约时间7.5min,全年可实现节约蒸汽7.26%。另外,通过对试验斋酒质量的品评得知,提高醪液预热温度对斋酒质量影响不大,斋酒质量稳定。

  15. Influence of frequency, grade, moisture and temperature on Green River oil shale dielectric properties and electromagnetic heating processes

    Energy Technology Data Exchange (ETDEWEB)

    Hakala, J. Alexandra [National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States); Stanchina, William [Univ. of Pittsburgh, PA (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States); Soong, Yee [National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States); Hedges, Sheila [National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)

    2011-01-01

    Development of in situ electromagnetic (EM) retorting technologies and design of specific EM well logging tools requires an understanding of various process parameters (applied frequency, mineral phases present, water content, organic content and temperature) on oil shale dielectric properties. In this literature review on oil shale dielectric properties, we found that at low temperatures (<200° C) and constant oil shale grade, both the relative dielectric constant (ε') and imaginary permittivity (ε'') decrease with increased frequency and remain constant at higher frequencies. At low temperature and constant frequency, ε' decreases or remains constant with oil shale grade, while ε'' increases or shows no trend with oil shale grade. At higher temperatures (>200º C) and constant frequency, epsilon' generally increases with temperature regardless of grade while ε'' fluctuates. At these temperatures, maximum values for both ε' and ε'' differ based upon oil shale grade. Formation fluids, mineral-bound water, and oil shale varve geometry also affect measured dielectric properties. This review presents and synthesizes prior work on the influence of applied frequency, oil shale grade, water, and temperature on the dielectric properties of oil shales that can aid in the future development of frequency- and temperature-specific in situ retorting technologies and oil shale grade assay tools.

  16. Influence of frequency, grade, moisture and temperature on Green River oil shale dielectric properties and electromagnetic heating processes

    Energy Technology Data Exchange (ETDEWEB)

    Hakala, J. Alexandra; Soong, Yee; Hedges, Sheila [National Energy Technology Laboratory, Pittsburgh, PA (United States); Stanchina, William [National Energy Technology Laboratory, Pittsburgh, PA (United States); Department of Electrical and Computer Engineering, University of Pittsburgh, PA (United States)

    2011-01-15

    Development of in situ electromagnetic (EM) retorting technologies and design of specific EM well logging tools requires an understanding of various process parameters (applied frequency, mineral phases present, water content, organic content and temperature) on oil shale dielectric properties. In this literature review on oil shale dielectric properties, we found that at low temperatures (< 200 C) and constant oil shale grade, both the relative dielectric constant ({epsilon}') and imaginary permittivity ({epsilon}'') decrease with increased frequency and remain constant at higher frequencies. At low temperature and constant frequency, {epsilon}' decreases or remains constant with oil shale grade, while {epsilon}'' increases or shows no trend with oil shale grade. At higher temperatures (> 200 C) and constant frequency, {epsilon}' generally increases with temperature regardless of grade while {epsilon}'' fluctuates. At these temperatures, maximum values for both {epsilon}' and {epsilon}'' differ based upon oil shale grade. Formation fluids, mineral-bound water, and oil shale varve geometry also affect measured dielectric properties. This review presents and synthesizes prior work on the influence of applied frequency, oil shale grade, water, and temperature on the dielectric properties of oil shales that can aid in the future development of frequency- and temperature-specific in situ retorting technologies and oil shale grade assay tools. (author)

  17. Proof-of-Concept Oil Shale Facility Environmental Analysis Program

    Energy Technology Data Exchange (ETDEWEB)

    1990-11-01

    The objectives of the Project are to demonstrate: (1) the Modified In- Situ (MIS) shale oil extraction process and (2) the application of CFBC technology using oil shale, coal and waste gas streams as fuels. The project will focus on evaluating and improving the efficiency and environmental performance of these technologies. The project will be modest by commercial standards. A 17-retort MIS system is planned in which two retorts will be processed simultaneously. Production of 1206-barrels per calendar day of raw shale oil and 46-megawatts of electricity is anticipated. West Virginia University coordinated an Environmental Analysis Program for the Project. Experts from around the country were retained by WVU to prepare individual sections of the report. These experts were exposed to all of OOSI`s archives and toured Tract C-b and Logan Wash. Their findings were incorporated into this report. In summary, no environmental obstacles were revealed that would preclude proceeding with the Project. One of the most important objectives of the Project was to verify the environmental acceptability of the technologies being employed. Consequently, special attention will be given to monitoring environmental factors and providing state of the art mitigation measures. Extensive environmental and socioeconomic background information has been compiled for the Tract over the last 15 years and permits were obtained for the large scale operations contemplated in the late 1970`s and early 1980`s. Those permits have been reviewed and are being modified so that all required permits can be obtained in a timely manner.

  18. Leading trends in environmental regulation that affect energy development. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Steele, R V; Attaway, L D; Christerson, J A; Kikel, D A; Kuebler, J D; Lupatkin, B M; Liu, C S; Meyer, R; Peyton, T O; Sussin, M H

    1980-01-01

    Major environmental issues that are likely to affect the implementation of energy technologies between now and the year 2000 are identified and assessed. The energy technologies specifically addressed are: oil recovery and processing; gas recovery and processing; coal liquefaction; coal gasification (surface); in situ coal gasification; direct coal combustion; advanced power systems; magnetohydrodynamics; surface oil shale retorting; true and modified in situ oil shale retorting; geothermal energy; biomass energy conversion; and nuclear power (fission). Environmental analyses of these technologies included, in addition to the main processing steps, the complete fuel cycle from resource extraction to end use. A comprehensive survey of the environmental community (including environmental groups, researchers, and regulatory agencies) was carried out in parallel with an analysis of the technologies to identify important future environmental issues. Each of the final 20 issues selected by the project staff has the following common attributes: consensus of the environmental community that the issue is important; it is a likely candidate for future regulatory action; it deals with a major environmental aspect of energy development. The analyses of the 20 major issues address their environmental problem areas, current regulatory status, and the impact of future regulations. These analyses are followed by a quantitative assessment of the impact on energy costs and nationwide pollutant emissions of possible future regulations. This is accomplished by employing the Strategic Environmental Assessment System (SEAS) for a subset of the 20 major issues. The report concludes with a more general discussion of the impact of environmental regulatory action on energy development.

  19. Possible future environmental issues for fossil fuel technologies. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Attaway, L.D.

    1979-07-01

    The work reported here was carried out for the Department of Energy's Office of Fossil Energy to identify and assess 15 to 20 major environmental issues likely to affect the implementation of fossil energy technologies between 1985 and 2000. The energy technologies specifically addressed are: oil recovery and processing; gas recovery and processing; coal liquefaction; coal gasification (surface); in situ coal gasification; direct coal combustion; advanced power systems; magnetohydrodynamics; surface oil shale retorting; and true and modified in situ oil shale retorting. Environmental analysis of these technologies included, in addition to the main processing steps, the complete fuel cycle from resource extraction to end use. The 16 environmental issues identified as those most likely for future regulatory actions and the main features of, and the possible regulatory actions associated with, each are as follows: disposal of solid waste from coal conversion and combustion technologies; water consumption by coal and oil shale conversion technologies; siting of coal conversion facilities; the carbon dioxide greenhouse effect; emission of polycyclic organic matter (POM); impacts of outer continental shelf (OCS) oil development; emission of trace elements; groundwater contamination; liquefied natural gas (LNG), safety and environmental factors; underground coal mining - health and safety; fugitive emissions from coal gasification and liquefaction - health and safety; boomtown effects; emission of fine particulates from coal, oil and oil shale technologies; emission of radioactivity from the mining and conversion of coal; emission of nitrogn oxides; and land disturbance from surface mining. (LTN)

  20. Life cycle assessment to evaluate the environmental impact of biochar implementation in conservation agriculture in Zambia.

    Science.gov (United States)

    Sparrevik, Magnus; Field, John L; Martinsen, Vegard; Breedveld, Gijs D; Cornelissen, Gerard

    2013-02-01

    Biochar amendment to soil is a potential technology for carbon storage and climate change mitigation. It may, in addition, be a valuable soil fertility enhancer for agricultural purposes in sandy and/or weathered soils. A life cycle assessment including ecological, health and resource impacts has been conducted for field sites in Zambia to evaluate the overall impacts of biochar for agricultural use. The life cycle impacts from conservation farming using cultivation growth basins and precision fertilization with and without biochar addition were in the present study compared to conventional agricultural methods. Three different biochar production methods were evaluated: traditional earth-mound kilns, improved retort kilns, and micro top-lit updraft (TLUD) gasifier stoves. The results confirm that the use of biochar in conservation farming is beneficial for climate change mitigation purposes. However, when including health impacts from particle emissions originating from biochar production, conservation farming plus biochar from earth-mound kilns generally results in a larger negative effect over the whole life cycle than conservation farming without biochar addition. The use of cleaner technologies such as retort kilns or TLUDs can overcome this problem, mainly because fewer particles and less volatile organic compounds, methane and carbon monoxide are emitted. These results emphasize the need for a holistic view on biochar use in agricultural systems. Of special importance is the biochar production technique which has to be evaluated from both environmental/climate, health and social perspectives.

  1. PEMBUATAN AYAKAN MOLEKULER BERBASIS KARBON UNTUK PEMISAHAN N2/O2 DARI PIROLISIS RESIN PHENOL FORMALDEHYDE

    Directory of Open Access Journals (Sweden)

    Imam Prasetyo

    2012-02-01

    Full Text Available Proses pemisahan campuran gas dengan menggunakan carbon molecular sieve (CMS atau ayakan molekuler berbasis karbon merupakan teknologi proses pemisahan yang mulai banyak diterapkan di dalam industri kimia. Dalam penelitian ini, CMS untuk pemisahan N2 dari udara dibuat dari pirolisis bahan polimer sintetis yaitu resin phenol formaldehyde (PF. Prekursor yang berupa resin tersebut dipanaskan dalam retort pada suhu 400-950oC selama 0,5-3 jam yang disertai dengan pengaliran gas N2 ke dalam retort dengan laju 100 mL/jam. Dengan proses pirolisis, atom-atom non-karbon penyusun bahan polimer akan terurai dan menguap sehingga hanya menyisakan arang karbon dengan struktur kerangka atom karbon yang sesuai dengan struktur kerangka dasar rantai polimer. Kemudian karbon hasil prolisis tersebut dipanaskan lebih lanjut pada suhu 750-950oC sambil dialiri gas CO2 selama 1 jam. Pada kondisi ini karbon akan mengalami proses gasifikasi parsial sehingga terbentuk karbon dengan porositas tinggi. Melalui rekayasa proses polimerisasi dan karbonisasi dihasilkan material karbon berpori yang mayoritas porinya adalah mikropori dengan ukuran pori efektif < 2 nm yang dapat dikategorikan sebagai CMS yang dapat dipergunakan untuk memisahkan campuran gas N2-O2.  Pada penelitian ini dihasilkan CMS dengan selektifitas kinetis DN2/DO2 sekitar 3.

  2. Size fractionation in mercury-bearing airborne particles (HgPM 10) at Almadén, Spain: Implications for inhalation hazards around old mines

    Science.gov (United States)

    Moreno, Teresa; Higueras, Pablo; Jones, Tim; McDonald, Iain; Gibbons, Wes

    Almadén has a >2000y mining history and an unprecedented legacy of mercury contamination. Resuspended airborne particles were extracted from mine waste (Las Cuevas), retort site soil (Almadenejos), and urban car park dust (Almadén), separated into fine (PM 10) and coarse (PM >10 μm ) fractions, analysed for mercury using ICP-MS, and individual HgPM characterised using SEM. Cold extractable mercury concentrations in PM 10 range from 100 to 150 μg g -1 (car parks), to nearly 6000 μg g -1 (mine waste), reaching a world record of 95,000 μg g -1 above the abandoned retort at Almadenejos where ultrafine HgPM have pervaded the brickwork and soil and entered the food chain: edible wild asparagus stem material from here contains 35-65 μg g -1 Hg, and pig hair from animals living, inhaling and ingesting HgPM 10 at the site yielded 8-10 μg g -1. The PM 10 fraction (dusts easily wind transported and deeply inhaled) contains much more mercury than the coarser fraction. The contribution of HgPM 10 to ecosystem contamination and potential human health effects around old mercury mines has been underestimated.

  3. Status and commentary of research and development on oil sand pyrolysis characteristics with technology and equipment%油砂热解特性及工艺与装置研究开发现状与评述

    Institute of Scientific and Technical Information of China (English)

    马小龙; 张自生; 高鑫; 李鑫钢

    2016-01-01

    油砂是一种储量巨大的非常规石油资源,油砂热解技术具有良好的工业化前景。本文概述了油砂热解的相关基础研究进展,包括油砂热解的3个阶段、气液固三相产物的性质及多种油砂热解动力学模型的总结。分析了常压干馏、惰性气体保护热解、加氢热解、减压热解及复合热解工艺,简述了不同工艺对产品收率和产品性质等方面的影响。回顾了油砂热解的装置,从固定床、旋转干馏炉、流化床干馏炉到Alberta Taciuk Process (ATP)装置,重点介绍了具有不同载热方式和能量回收方式的旋转干馏炉和流化床干馏炉。从能源利用效率的角度分析对比了各种热解工艺和热解设备的优势与劣势,阐明了降低能耗提高能源效率是热解技术的主要问题,进而提出了旋转干馏炉和流化床干馏炉具有更好的工业前景。%Oil sand is a kind of unconventional oil resources and the pyrolysis technique of oil sand is suitable for industrial application. In this paper the fundamental research of oil sand pyrolysis was summarized, including the three stages of oil sand pyrolysis,properties of gaseous,liquid and solid products and various pyrolysis kinetic models of oil sand. Atmospheric retorting,pyrolysis under inert gas,hydropyrolysis, vacuum pyrolysis and combined pyrolysis technology were analyzed. The effects on the products yields and characteristics of different pyrolysis technologies were reviewed. The pyrolysis equipment were summarized,including fixed bed reactor,rotary retort,fluidized-bed retort and Alberta Taciuk Process (ATP) reactor. And special emphasis was placed on the rotary and fluidized-bed retorts using different ways of heat carrier and energy recovery. From the perspective of energy efficiency,the advantages and disadvantages of different technologies and equipments were analyzed by comparison. It was indicated that reducing energy consumption and

  4. Application of cogeneration technology of gas-liquid-solid products pyrolyzed from crop straw%农作物秸秆热解多联产技术的应用

    Institute of Scientific and Technical Information of China (English)

    刘标; 陈应泉; 何涛; 杨海平; 王贤华; 陈汉平

    2013-01-01

      农作物秸秆是重要的可再生能源,开发先进高效的秸秆利用技术,有助于缓解能源危机,增加废弃物资源的二次化利用,降低环境污染。该文介绍了一种新型的农作物秸秆固定床干馏釜气固液联产技术,并以湖北省天门市杨林办集中供气示范站为商业化运行典型案例进行了经济效益分析。农作物秸秆固定床干馏釜气固液联产技术可以同时产出中等热值(8~12 MJ/m3)的民用燃气和低位发热量达到28 MJ/kg 的生物质焦炭,此外还有一定应用潜力的木焦油和木醋液。现有规模商业化运行,电价和用工成本的大幅上升降低了集中供气示范站的经济效益。%To improve the standard of living in rural areas, many distributed gas stations were constructed in Hubei province, and these stations were based on the biomass-polygeneration technology which could produce charcoal, fuel gas and bio-oil simultaneously. This paper presented a theoperational process and the character of products of a typical station. The gas station consisted of a biomass pretreatment system, retort equipment, condensation and purification system, gas storage tank, and pipeline. At first, agricultural straws were dried until their moisture content was below 12%. Subsequently, the dried straws were briquetted, and these briquettes were placed in an orderly manner in the retort equipment. The fuel gas or straws were combusted to supply heat for the pyrolysis process of the briquettes. A complete pyrolysis process would take above 8 hours. At the beginning of 2-3 hours, a large amount of water was formed from external water and bound water when the temperature was controlled below 250℃. At this stage, the gas product consisted of CO2, CO, and water vapor, and the heat value was rather lower, therefore, these gases would combust. After the gas product was heated about 5~6 hours, the temperature of the retort was up to 600℃, then, the

  5. Demonstration of New Technologies Required for the Treatment of Mixed Waste Contaminated with {ge}260 ppm Mercury

    Energy Technology Data Exchange (ETDEWEB)

    Morris, M.I.

    2002-02-06

    The Resource Conservation and Recovery Act (RCRA) defines several categories of mercury wastes, each of which has a defined technology or concentration-based treatment standard, or universal treatment standard (UTS). RCRA defines mercury hazardous wastes as any waste that has a TCLP value for mercury of 0.2 mg/L or greater. Three of these categories, all nonwastewaters, fall within the scope of this report on new technologies to treat mercury-contaminated wastes: wastes as elemental mercury; hazardous wastes with less than 260 mg/kg [parts per million (ppm)] mercury; and hazardous wastes with 260 ppm or more of mercury. While this report deals specifically with the last category--hazardous wastes with 260 ppm or more of mercury--the other two categories will be discussed briefly so that the full range of mercury treatment challenges can be understood. The treatment methods for these three categories are as follows: Waste as elemental mercury--RCRA identifies amalgamation (AMLGM) as the treatment standard for radioactive elemental mercury. However, radioactive mercury condensates from retorting (RMERC) processes also require amalgamation. In addition, incineration (IMERC) and RMERC processes that produce residues with >260 ppm of radioactive mercury contamination and that fail the RCRA toxicity characteristic leaching procedure (TCLP) limit for mercury (0.20 mg/L) require RMERC, followed by AMLGM of the condensate. Waste with <260 ppm mercury--No specific treatment method is specified for hazardous wastes containing <260 ppm. However, RCRA regulations require that such wastes (other than RMERC residues) that exceed a TCLP mercury concentration of 0.20 mg/L be treated by a suitable method to meet the TCLP limit for mercury of 0.025 mg/L. RMERC residues must meet the TCLP value of {ge}0.20 mg/L, or be stabilized and meet the {ge}0.025 mg/L limit. Waste with {ge}260 ppm mercury--For hazardous wastes with mercury contaminant concentrations {ge}260 ppm and RCRA

  6. Emissions and Char Quality of Flame-Curtain "Kon Tiki" Kilns for Farmer-Scale Charcoal/Biochar Production.

    Directory of Open Access Journals (Sweden)

    Gerard Cornelissen

    Full Text Available Pyrolysis of organic waste or woody materials yields charcoal, a stable carbonaceous product that can be used for cooking or mixed into soil, in the latter case often termed "biochar". Traditional kiln technologies for charcoal production are slow and without treatment of the pyrolysis gases, resulting in emissions of gases (mainly methane and carbon monoxide and aerosols that are both toxic and contribute to greenhouse gas emissions. In retort kilns pyrolysis gases are led back to a combustion chamber. This can reduce emissions substantially, but is costly and consumes a considerable amount of valuable ignition material such as wood during start-up. To overcome these problems, a novel type of technology, the Kon-Tiki flame curtain pyrolysis, is proposed. This technology combines the simplicity of the traditional kiln with the combustion of pyrolysis gases in the flame curtain (similar to retort kilns, also avoiding use of external fuel for start-up.A field study in Nepal using various feedstocks showed char yields of 22 ± 5% on a dry weight basis and 40 ± 11% on a C basis. Biochars with high C contents (76 ± 9%; n = 57, average surface areas (11 to 215 m2 g-1, low EPA16-PAHs (2.3 to 6.6 mg kg-1 and high CECs (43 to 217 cmolc/kg(average for all feedstocks, mainly woody shrubs were obtained, in compliance with the European Biochar Certificate (EBC.Mean emission factors for the flame curtain kilns were (g kg-1 biochar for all feedstocks; CO2 = 4300 ± 1700, CO = 54 ± 35, non-methane volatile organic compounds (NMVOC = 6 ± 3, CH4 = 30 ± 60, aerosols (PM10 = 11 ± 15, total products of incomplete combustion (PIC = 100 ± 83 and NOx = 0.4 ± 0.3. The flame curtain kilns emitted statistically significantly (p<0.05 lower amounts of CO, PIC and NOx than retort and traditional kilns, and higher amounts of CO2.With benefits such as high quality biochar, low emission, no need for start-up fuel, fast pyrolysis time and, importantly, easy and cheap

  7. Effect of different percent loadings of nanoparticles and food processing conditions on the properties of nylon 6 films

    Science.gov (United States)

    Allafi, Ahmad R.

    Nylon 6 organoclay nanocomposites were prepared by melt processing using a twin screw extruder. Five different films were produced with five different % loadings (0, 2, 4, 6, and 8%). This study had three main objectives. The first was to investigate the effects of loading percentages on the barrier, thermal and mechanical properties of nylon 6 nanocomposite materials. The second was to study the effects of 0, 50 and 80% RH on the oxygen permeation of the nylon 6/nanocomposite films. The third was to investigate the properties of nylon 6 nanocomposite materials exposed to typical food processing conditions. These films were tested for their permeabilities to oxygen (OTR), carbon dioxide (CO2TR), and water vapor (WVTR). Thermal properties testing on the samples included differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Tensile strength at break, tensile modulus at break, and the percent elongation for the five films were examined using an INSTRON tester. Transmission electron microscopy (TEM) was used to investigate the morphology of the five films. Results showed that all gas barriers significantly increased with percent loading but there were no significant differences (P>0.05) between the 6 and 8% for the CO2TR. For the DMA, the storage modulus also significantly increased (P<0.05) with increasing loading except between the 2 and 4% concentrations. For the DSC analyses, enthalpy of fusion decreased slightly from an average of 39 J/g (control) to 32J/g (8% loading). The melt temperature also decreased from 227 to 222°C between those loadings. High pressure processed samples had the highest barrier against oxygen permeation when compared with the retorted and controls. Retorting seemed to reduce the tensile strength slightly; however, no significant changes in modulus and elongation occurred after retorting and HPP. These results showed that increasing percent loadings increased the stiffness of the material at the expense of its

  8. 不同包装材料对冷鲜鸡胸肉品质的影响%Effects of Different Packaging Method on Chicken Breast Qualities

    Institute of Scientific and Technical Information of China (English)

    闫文杰; 李兴民

    2016-01-01

    In order to explore the technology of prolonging cooled chicken shelf life,Changes of sensory index、drip loss、Aw、TVBN value、total bacterial count and globulin precipitation of chilled chicken breast at 0-4 ℃were detected after samples were treated with pallet package、PE aseptic bag and high-temperature retort bag vacuum package . The results showed that changes of above indexes of PE aseptic bag and high-temperature re-tort bag vacuum package were better significantly than pallet package. the effect of high-temperature retort bag vacuum was most significant,in ninth days,organoleptic state was secondary fresh meat,drip loss was 5.58%, Aw was 0.987,TVBN value was 11.9 mg/100 g,total bacterial count was less than 106 cfu/g,globulin precipita-tion was minimum.%以冷鲜鸡胸肉为原料,采用托盘包装、PE无菌袋和高温蒸煮袋真空包装处理后,测定样品在0~4℃贮藏过程中感官指标、汁液流失率、Aw、TVBN值、菌落总数和球蛋白沉淀的变化。结果表明:鸡胸肉经PE无菌袋和高温蒸煮袋真空包装处理后,上述指标的变化显著好于托盘包装处理。高温蒸煮袋真空包装处理对抑制鸡胸肉品质下降的效果最显著,在第9天,感官状态显示依然为二级鲜肉,汁液流失率为5.58%,Aw为0.987,TVBN值为11.9 mg/100 g,菌落总数小于106 cfu/g,球蛋白沉淀最小。

  9. Energy and Technology Review, August--September

    Energy Technology Data Exchange (ETDEWEB)

    Sefcik, J A [ed.

    1992-01-01

    This issue of Energy and Technology Review focuses on cooperative research and development agreements (CRADAs)-one of the Laboratory's most effective means of technology transfer. The first article chronicles the legislative evolution of these agreements. The second article examines the potential beneficial effects of CRADAs on the national economy and discusses their role in the development and marketing of Laboratory technologies. The third article provides information on how to initiate and develop CRADAs at LLNL, and the fourth and fifth articles describe the Laboratory's two most prominent technology transfer projects. One is a 30-month CRADA with General Motors to develop advanced lasers for cutting, welding, and heat-treating operations. The cover photograph shows this laser cutting through a piece of steel 1/16 of an inch thick. The other project is a three-year CRADA with Amoco, Chevron-Conoco, and Unocal to refine our oil shale retorting process.

  10. Automated thermal treatment of metals with a mechanically fluidized vacuum machine. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Kemp, W.E.

    1997-09-05

    The ERIP project {open_quotes}Automated Thermal Treatment of Metals with a Mechanically Fluidized Vacuum Machine{close_quotes} produced more benefits in unintended areas than in the original intent of the program. The first project was directed to heat treating of solid parts using a retort half filled with fine powder. The treatment of metal powders was not originally envisioned at the time of proposal preparation. This second application, where the powder itself is being treated, has turned out to be multi-billion dollar market in which the Mechanical Fluidized Vacuum machine can create revolutionary changes. Consequently most efforts in recent years have been dedicated to further growth of the powder markets. These efforts procured a second ERIP grant titled {open_quotes}Thermal Heat and Diffusion Treatment of Bulk Powders.{close_quotes}

  11. Report of the Energy Field Institute V on western energy opportunities, problems, and policy issues

    Energy Technology Data Exchange (ETDEWEB)

    Hepworth, J.C.; Foss, M.M.

    1982-12-01

    The fifth Energy and Minerals Field Institute program for Washington, D.C. Congressional and Executive Aides was held during August 15-21, 1982. The five-and-one-half day program was conducted through Wyoming, Colorado and Utah and consisted of visits to: an R and D tertiary petroleum production facility; an historic oil field entering secondary production; a surface uranium mine; a petroleum exploration drilling rig; a surface coal mine; an air cooled, coal-fired power plant; an oil shale site; a geothermal-electrical generating facility; and open pit copper mine and associated smelter and refinery; a petroleum refinery and an oil shale semi-works retort. During the field program, participants had opportunities to view communities affected by these activities, such as Wright City and Gillette, Wyoming, Parachute, Colorado and Milford and Cedar City, Utah. Throughout the program, aides met with local, state and industry officials and citizen leaders during bus rides, meals and site visits.

  12. Carbonisation of coal with chlorides content

    Energy Technology Data Exchange (ETDEWEB)

    E. Plevova

    2002-07-01

    From accessible literature it is evident that the addition of Lewis acids to coal before carbonisation can effect the course of reactions in the way of getting required products. An investigation was carried out into the effects of addition of chloride solutions. For experiments low concentration of solutions of three chlorides (PbCl{sub 2}, ZnCl{sub 2}, AlC{sub 3}) were used. Then samples were carbonised in a special coking retort. Volatile products were collected to establish the mass balance of this process. The resultant properties of obtained char and coal tar were estimated. Evaluation of the solid phase showed the increasing of specific surface although the used solution concentration was quite low. Estimation of obtained tar indicated mainly increasing of aromatic hydrocarbons in consequence of charring and aromatisation of carbon skeleton. 3 refs., 1 fig., 3 tabs.

  13. In the gramaticalization limits. The evolution of encima (de que as speech marker

    Directory of Open Access Journals (Sweden)

    Mar Garachana Camarero

    2008-06-01

    Full Text Available The present paper describes the process of semantic subjectivization that Spanish encima ‘on top’ undergoes in its development from a prepositional phrase (en cima ‘on top’ to its extended uses as a discourse marker of addition, counterargumentation, and retort. Many changes implicated in the evolution of encima are typical of grammaticalization (semantic bleaching, development of procedural meanings, decategorization, and univerbation of the two original components of the PP. Nonetheless, the fact that the discoursive marker is able to come out of syntagmatic frame, reaching an orational and textual level, gaining in syntaxes mobility or even to occupy a speech turn by itself (¡Encima! is a serious objection when the time comes to include it into the gramaticalization, typically characterized basically by eliminating the gramaticalized term’s phonology and by the obligatorification and rigidification of the piece being gramaticalized.

  14. Testing the Non-Parametric Conditional CAPM in the Brazilian Stock Market

    Directory of Open Access Journals (Sweden)

    Daniel Reed Bergmann

    2014-04-01

    Full Text Available This paper seeks to analyze if the variations of returns and systematic risks from Brazilian portfolios could be explained by the nonparametric conditional Capital Asset Pricing Model (CAPM by Wang (2002. There are four informational variables available to the investors: (i the Brazilian industrial production level; (ii the broad money supply M4; (iii the inflation represented by the Índice de Preços ao Consumidor Amplo (IPCA; and (iv the real-dollar exchange rate, obtained by PTAX dollar quotation.This study comprised the shares listed in the BOVESPA throughout January 2002 to December 2009. The test methodology developed by Wang (2002 and retorted to the Mexican context by Castillo-Spíndola (2006 was used. The observed results indicate that the nonparametric conditional model is relevant in explaining the portfolios’ returns of the sample considered for two among the four tested variables, M4 and PTAX dollar at 5% level of significance.

  15. Characterization and beneficiation of the Egyptian black shale for possible extraction of organic matter

    Institute of Scientific and Technical Information of China (English)

    Abd El-Rahiem F.H.; Hassan M.S.; Selim K.A.; Abdel-Khalek N.A

    2014-01-01

    The present paper focuses on obtaining concentrate enriched with organic matter that could be suitable for a retorting process from black shale; this is black shale from the Safaga area on the Red Sea Coast. X-ray diffraction and optical polarising microscope are used in evaluating black shale minerals. Attrition scrubbing and flotation were conducted for enrichment of organic matter in the black shale sample. Mineralogical studies revealed that black shale samples contain bituminous calcareous clay stone, quartz, apatite and pyrite. Rabah mine black shale contains 28% organic matter. The results of the different separation techniques indicate that attrition and flotation techniques successively enriched the organic matter in the black shale. The organic matter could be enriched in the black shale and obtained a concen-trate with 59%assaying and 85%recovery.

  16. Effects of aqueous effluents from in situ fossil-fuel processing technologies on aquatic systems

    Energy Technology Data Exchange (ETDEWEB)

    Bergman, H.L.

    1978-12-01

    Progress is reported for the second year of this project to evaluate the effects of aqueous effluents from in-situ fossil fuel processing technologies on aquatic biota. The project objectives for Year 2 were pursued through five tasks: literature reviews on process water constituents, possible environmental impacts and potential control technologies; toxicity bioassays on the effects of coal gasification and oil shale retorting process waters and six process water constituents on aquatic biota; biodegradation studies on process water constituents; bioaccumulation factor estimation for the compounds tested in the toxicity bioassays; and recommendations on maximum exposure concentrations for process water constituents based on data from the project and from the literature. Results in each of the five areas of research are reported.

  17. Photovoltaic policy is questioned; Le photovoltaique en garde a vue

    Energy Technology Data Exchange (ETDEWEB)

    Piro, P.; Cessac, M.

    2011-01-15

    The French government has decided a freeze and a reassessment of the measures taken to support the photovoltaic sector. Only the installations with a power output over 3 kWc are concerned so the market of solar roofs for homes is spared. The main reasons for this reversal is the quick and chaotic development of photovoltaic projects, a lot of projects are only motivated by the lure of high purchase prices of the electricity produced imposed by the law on EDF. Another reason is that 90% of the solar panels installed in France come from China, the photovoltaic sector retorts that 75% of the price of a complete installation pays for services produced in France. (A.C.)

  18. Synthetic fuels technology overview with health and environmental impacts

    Science.gov (United States)

    Bentz, E. J., Jr.; Salmon, E. J.

    1981-06-01

    An introduction is presented to the following synthetic fuels technologies: (1) the Lurgi gasification of coal; (2) the Fischer-Tropsch liquefaction of coal; (3) coal-methanol conversion; (4) donor solvent gas liquefaction; (5) Tosco surface shale retorting; ethanol production from coal; and (6) the coal-methanol-gasoline conversion process. After establishing the system characteristics of these six technologies, consideration is given to their potential major health, safety, environmental and socio-economic impacts at the global, regional and local levels. It is determined that the main global consequence of synfuels development is climate modification, to which may be added the regional impact of dry and wet deposition of gaseous and particulate pollutants, and land and water quality deterioration due to soil erosion at the local level.

  19. OPERATION OF ENTERPRISE RESOURCE PLANNING SYSTEM IMPLEMENTATION COMPATIBILITY TOWARDS TECHNICAL ADVANCEMENT

    Directory of Open Access Journals (Sweden)

    J. Venkatesh

    2013-01-01

    Full Text Available The Execution of ERP systems has been perplexing factor for many firms. Many establishments have accepted that the operation of ERP system is a massive hindrance until the flow of process is organized carefully. As information technology is booming its prerequisite for organizations to realize the prominence of technical advancement and compatibility in work environment. A complete review was done to ascertain the features and strategic aids of ERP enactments using the retorts from 120 firms. The respondents were approached with orderly framed questionnaires, thereby giving them ample time to come out with their own thoughts. The effects of this learning provide assistance for the vendors, higher officials and ERP specialists to be more competent in handling the execution of ERP with their inadequate possessions there by augmenting the business. It acts a pathway for the concerns to realize their potent and extend their business platform.

  20. Fuel Gas Demonstration Plant Program: Small-Scale Industrial Project. Demonstration plant design manual, Phase I

    Energy Technology Data Exchange (ETDEWEB)

    1979-01-01

    The plant will utilize fixed bed, stirred, two stage gasifiers. The lower stage will be a standard gasifier configuration. The upper stage will be an undivided distillation section containing a slowly rotating stirrer which will move vertically through the bed. The bottom of the gasifier will contain a standard dry grate and will have lock hoppers to discharge the ash. This type of gasifier provides high coal utilization. It also distills the tars and oils from the coal in the upper zone at minimum temperatures, thereby providing minimum viscosity liquid fuels which can be used for the induration of iron ore pellets. The very hot bottom gases leaving the combustion zone, after passing through a cyclone to remove coal and ash dust can be used to generate steam. This steam is in addition to the steam generated in the water jacket of the lower zone which is used in the steam air blast to the bottom of the gasifier retort.

  1. The Durability of Various Crucible Materials for Aluminum Nitride Crystal growth by Sublimation

    Energy Technology Data Exchange (ETDEWEB)

    Liu,B.; Edgar, J.; Gu, Z.; Zhuang, D.; Raghothamachar, B.; Dudley, M.; Sarua, A.; Kuball, M.; Meyer, H.

    2004-01-01

    Producing high purity aluminum nitride crystals by the sublimation-recondensation technique is difficult due to the inherently reactive crystal growth environment, normally at temperature in excess of 2100 C. The durability of the furnace fixture materials (crucibles, retorts, etc.) at such a high temperature remains a critical problem. In the present study, the suitability of several refractory materials for AlN crystal growth is investigated, including tantalum carbide, niobium carbide, tungsten, graphite, and hot-pressed boron nitride. The thermal and chemical properties and performance of these materials in inert gas, as well as under AlN crystal growth conditions are discussed. TaC and NbC are the most stable crucible materials with very low elemental vapor pressures in the crystal growth system. Compared with refractory material coated graphite crucibles, HPBN crucible is better for AlN self-seeded growth, as crystals tend to nucleate in thin colorless platelets with low dislocation density.

  2. Use of sodium salt electrolysis in the process of continuous modification of eutectic EN AC-AlSi12 alloy

    Indian Academy of Sciences (India)

    J Pezda; A Białobrzeski

    2015-04-01

    This paper presents test results concerning the selection of sodium salt for the technology of continuous modification of the EN AC-AlSi12 alloy, which is based on electrolysis of sodium salts, occurring directly in a crucible with liquid alloy. Sodium ions formed as a result of the sodium salt dissociation and the electrolysis are 'transferred' through walls of the retort made of solid electrolyte. Upon contact with the liquid alloy, which functions as a cathode, sodium ions are transformed into the atomic state, modifying the alloy. As a measure of the alloy modification extent, the obtained increase of the tensile strength m and change of metallographic structure are used, confirming obtained modification effect of the investigated alloy.

  3. Traditional Indian Foods-Some Recent Developments

    Directory of Open Access Journals (Sweden)

    S. S. Arya

    1984-04-01

    Full Text Available Considerable progress has been made in the preservation of traditional Indian foods in ready-to-eat form and products like chapaties, stuffed parothas, halwa, upma, kheer, idli, avial, pullav, precooked dehydrated dhals, precooked dehydrated instantised pullav and alu-chholay have been preserved for periods ranging from 6 months to one year under ambient conditions either by thermal processing in cans and flexible retortable pouches or by the use of preservatives and dehydration. Processes have also been developed for freeze drying of tropical Indian fruits like mango and pineapple in the form of fruit juice powders. Preserved products have been utilized extensively during mountaineering expeditions, Antarctica expeditions and feeding of cosmonauts in space programmes. Some of the critical parameters in the process development and their role in the sensory quality of preserved foods have been highlighted.

  4. Market enhancement of shale oil: The native products extraction technology

    Energy Technology Data Exchange (ETDEWEB)

    Bunger, J.W. (Bunger (James W.) and Associates, Inc., Salt Lake City, UT (United States)); DuBow, J.B. (Utah Univ., Salt Lake City, UT (United States))

    1991-10-01

    The overall objective of this work was to assess the feasibility of enhancing shale oil commercialization through SO/NPX technology. Specific objectives were: (1) To determine the properties and characteristics of fractions isolable from shale oil utilizing separation sequences which are based on thermodynamic considerations; (2) To identify product streams of market value for promising technology development; (3)To conduct technology development studies leading to a shale oil extraction and processing sequence which promises economic enhancement of shale oil commercialization; (4) To develop an analytical methodology and model for obtaining engineering design data required for process development; (5) To estimate the economics of SO/NPX including the potential for enhancing the profitability of a commercial-scale shale oil MIS retort.

  5. Food processing by high hydrostatic pressure.

    Science.gov (United States)

    Yamamoto, Kazutaka

    2017-04-01

    High hydrostatic pressure (HHP) process, as a nonthermal process, can be used to inactivate microbes while minimizing chemical reactions in food. In this regard, a HHP level of 100 MPa (986.9 atm/1019.7 kgf/cm(2)) and more is applied to food. Conventional thermal process damages food components relating color, flavor, and nutrition via enhanced chemical reactions. However, HHP process minimizes the damages and inactivates microbes toward processing high quality safe foods. The first commercial HHP-processed foods were launched in 1990 as fruit products such as jams, and then some other products have been commercialized: retort rice products (enhanced water impregnation), cooked hams and sausages (shelf life extension), soy sauce with minimized salt (short-time fermentation owing to enhanced enzymatic reactions), and beverages (shelf life extension). The characteristics of HHP food processing are reviewed from viewpoints of nonthermal process, history, research and development, physical and biochemical changes, and processing equipment.

  6. Estonia`s oil shale industry - meeting environmental standards of the future

    Energy Technology Data Exchange (ETDEWEB)

    Tanner, T. [Jaakko Poyry International, Helsinki (Finland); Bird, G.; Wallace, D. [Alberta Research Council, Edmonton (Canada)] [and others

    1995-12-31

    Oil shale is Estonia`s greatest mineral resource. In the 1930s, it was used as a source of gasoline and fuel oil, but now it is mined primarily for thermal generation of electricity. With the loss of its primary market for electricity in the early 1990s and in the absence of another domestic source of fuel Estonia once again is considering the use of a larger proportion of its shale for oil production. However, existing retorting operations in Estonia may not attain western European environmental standards and desired conversion efficiencies. As a reference point, the Estonian authorities have documented existing environmental impacts. It is evaluating technologies to reduce the impacts and is setting a direction for the industry that will serve domestic needs. This paper provides a description of the existing oil shale industry in Estonia and options for the future.

  7. The importance of the industrialization of Brazilian shale when faced with the world energy scenario; A importancia da industrializacao do xisto brasileiro frente ao cenario energetico mundial

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Marilin Mariano dos; Matai, Patricia Helena Lara dos Santos [Universidade de Sao Paulo (USP), SP (Brazil). Programa de Pos-Graduacao em Energia], Emails: marilinsantos@usp.br, pmatai@usp.br

    2010-10-15

    This article discusses the importance of the industrialization of Brazilian shale based on factors such as: security of the national energy system security, global oil geopolitical, resources available, production costs, oil prices, environmental impacts and the national oil reserves. The study shows that the industrialization of shale always arises when issues such as peak oil or its geopolitics appear as factors that raise the price of oil to unrealistic levels. The article concludes that in the Brazilian case, shale oil may be classified as a strategic resource, economically viable, currently in development by the success of the retorting technology for extraction of shale oil and the price of crude oil. The article presents the conclusion that shale may be the driving factor for the formation of a technology park in Sao Mateus do Sul, due to the city's economic dependence on PETROSIX. (author)

  8. Molecular characterization and comparison of shale oils generated by different pyrolysis methods using FT-ICR mass spectrometry

    Science.gov (United States)

    Jin, J.M.; Kim, S.; Birdwell, J.E.

    2011-01-01

    Fourier transform ion cyclotron resonance mass spectrometry (FT ICR-MS) was applied in the analysis of shale oils generated using two different pyrolysis systems under laboratory conditions meant to simulate surface and in situ oil shale retorting. Significant variations were observed in the shale oils, particularly the degree of conjugation of the constituent molecules. Comparison of FT ICR-MS results to standard oil characterization methods (API gravity, SARA fractionation, gas chromatography-flame ionization detection) indicated correspondence between the average Double Bond Equivalence (DBE) and asphaltene content. The results show that, based on the average DBE values and DBE distributions of the shale oils examined, highly conjugated species are enriched in samples produced under low pressure, high temperature conditions and in the presence of water.

  9. Apparatus for producing charcoal from fine lignocellulose wastes

    Energy Technology Data Exchange (ETDEWEB)

    Babicki, R.; Perzynski, B.

    1979-05-15

    A continuous retort for the production of charcoal from sawdust, nut shells, wood chips, etc. consists of a cylindrical tower separated from the top into the drying, pyrolyzing, and cooling sections. Dry feed is introduced at the top where it is spread by stirrer blades on 2 trays kept at 120 degrees and 160 degrees by external heating. The feed falls through discharge slots into a 2nd section where it is contacted with a limited supply of hot air while the temperature rises to about 600 degrees. Hot charcoal is swept by stirrer blades toward discharge slots and falls into a 3rd section where it is cooled and discharged. Off gases are used for predrying the incoming feed, scrubbed, and vented through a stack.

  10. [Study on rapid analysis method of pesticide contamination in processed foods by GC-MS and GC-FPD].

    Science.gov (United States)

    Kobayashi, Maki; Otsuka, Kenji; Tamura, Yasuhiro; Tomizawa, Sanae; Kamijo, Kyoko; Iwakoshi, Keiko; Sato, Chizuko; Nagayama, Toshihiro; Takano, Ichiro

    2011-01-01

    A simple and rapid method using GC-MS and GC-FPD for the determination of pesticide contamination in processed food has been developed. Pesticides were extracted from a sample with ethyl acetate in the presence of anhydrous sodium sulfate, then cleaned up with a combination of mini-columns, such as macroporous diatomaceous earth, C18, GCB (graphite carbon black) and PSA. Recovery tests of 57 pesticides (known to be toxic or harmful) from ten kinds of processed foods (butter, cheese, corned beef, dried shrimp, frozen Chinese dumplings, grilled eels, instant noodles, kimchi, retort-packed curry and wine) were performed, and the recovery rates were mostly between 70% and 120%. This method can be used to judge whether or not processed foods are contaminated with pesticides at potentially harmful levels.

  11. Rehabilitation potential and practices of Colorado oil shale lands. Progress report, June 1, 1978--May 31, 1979

    Energy Technology Data Exchange (ETDEWEB)

    Cook, C.W.

    1979-03-01

    The following document is a third-year progress report for the period June 1, 1978 to May 31, 1979. The overall objective of the project is to study the effects of seeding techniques, species mixtures, fertilizer, ecotypes, improved plant materials, mycorrhizal fungi, and soil microorganisms on the initial and final stages of reclamation obtained through seeding and subsequent succession on disturbed oil shale lands. Plant growth medias that are being used in field-established test plots include retorted shale, soil over retorted shale, subsoil materials, and surface disturbed topsoils. Because of the long-term nature of successional and ecologically oriented studies the project is just beginning to generate significant publications. Several of the studies associated with the project have some phases being conducted principally in the laboratories and greenhouses at Colorado State Univerisity. The majority of the research, however, is being conducted on a 20 hectare Intensive Study Site located near the focal points of oil shale activity in the Piceance Basin. The site is at an elevation of 2,042 m, receives approximately 30 to 55 cm of precipitation annually, and encompasses the plant communities most typical of the Piceance Basin. Most of the information contained in this report originated from the monitoring and sampling of research plots established in either the fall of 1976 or 1977. Therefore, data that have been obtained from the Intensive Study Site represent only first- or second-year results. However, many trends have been identified in thesuccessional process and the soil microorganisms and mycorrhizal studies continue to contribute significant information to the overall results. The phytosociological study has progressed to a point where field sampling is complete and the application and publication of this materials will be forthcoming in 1979.

  12. Uncovering leaf rust responsive miRNAs in wheat (Triticum aestivum L.) using high-throughput sequencing and prediction of their targets through degradome analysis.

    Science.gov (United States)

    Kumar, Dhananjay; Dutta, Summi; Singh, Dharmendra; Prabhu, Kumble Vinod; Kumar, Manish; Mukhopadhyay, Kunal

    2017-01-01

    Deep sequencing identified 497 conserved and 559 novel miRNAs in wheat, while degradome analysis revealed 701 targets genes. QRT-PCR demonstrated differential expression of miRNAs during stages of leaf rust progression. Bread wheat (Triticum aestivum L.) is an important cereal food crop feeding 30 % of the world population. Major threat to wheat production is the rust epidemics. This study was targeted towards identification and functional characterizations of micro(mi)RNAs and their target genes in wheat in response to leaf rust ingression. High-throughput sequencing was used for transcriptome-wide identification of miRNAs and their expression profiling in retort to leaf rust using mock and pathogen-inoculated resistant and susceptible near-isogenic wheat plants. A total of 1056 mature miRNAs were identified, of which 497 miRNAs were conserved and 559 miRNAs were novel. The pathogen-inoculated resistant plants manifested more miRNAs compared with the pathogen infected susceptible plants. The miRNA counts increased in susceptible isoline due to leaf rust, conversely, the counts decreased in the resistant isoline in response to pathogenesis illustrating precise spatial tuning of miRNAs during compatible and incompatible interaction. Stem-loop quantitative real-time PCR was used to profile 10 highly differentially expressed miRNAs obtained from high-throughput sequencing data. The spatio-temporal profiling validated the differential expression of miRNAs between the isolines as well as in retort to pathogen infection. Degradome analysis provided 701 predicted target genes associated with defense response, signal transduction, development, metabolism, and transcriptional regulation. The obtained results indicate that wheat isolines employ diverse arrays of miRNAs that modulate their target genes during compatible and incompatible interaction. Our findings contribute to increase knowledge on roles of microRNA in wheat-leaf rust interactions and could help in rust

  13. Choice of salts for process of continous sodium modification of Al-Si alloys

    Directory of Open Access Journals (Sweden)

    Białobrzeski A.

    2007-01-01

    Full Text Available Broad application of aluminum cast alloys, silumins first of all, have become to be possible after finding a method of change of solidification form in Al-Si eutectic mixture. By introduction to liquid alloy a slight additive of modifying agent this primary thick, needle-like shape of Si crystals becomes altered into fine and compact structure. Quality of structure modification depends on correct proportioning of the modifying agent, temperature of metal and time elapsing from modification to solidification of the alloy. The sodium is used as one of the modifying agents. The sodium is introduced into metal bath in metallic form or in form of compounds containing sodium. Apart from a form in which modifying agent is introduced to metal bath, however, its action is relatively short (about 15-20 minutes. Prolongation of modifying agent’s action can be accomplished due to technology of continuous introduction of the sodium to metal bath. That technology is based on continuous electrolysis of sodium salt, occurring directly in melting pot with liquid alloy. Sodium salt placed in retort ( immersed in liquid metal undergoes dissociation due to applied voltage, and next electrolysis. Sodium ions arisen during the dissociation of sodium salts and electrolysis are “conveyed” through retort walls made from solid electrolyte. In contact with liquid alloy as cathode, sodium ions pass to atomic state, modifying the alloy. Suitable selection of material for the anode (source of sodium is an important issue. The paper presents results of preliminary research concerning selection of sodium salt, based on predetermined Rm tensile strength and measured voltage drop for the alloy in solid state. Values of those parameters confirm modification effect on tested alloys. Complexity of physical-chemical phenomena occurring in course of the process effects on necessity of further investigation which needs to be performed for optimization of parameters of the

  14. WATEQ3 geochemical model: thermodynamic data for several additional solids

    Energy Technology Data Exchange (ETDEWEB)

    Krupka, K.M.; Jenne, E.A.

    1982-09-01

    Geochemical models such as WATEQ3 can be used to model the concentrations of water-soluble pollutants that may result from the disposal of nuclear waste and retorted oil shale. However, for a model to competently deal with these water-soluble pollutants, an adequate thermodynamic data base must be provided that includes elements identified as important in modeling these pollutants. To this end, several minerals and related solid phases were identified that were absent from the thermodynamic data base of WATEQ3. In this study, the thermodynamic data for the identified solids were compiled and selected from several published tabulations of thermodynamic data. For these solids, an accepted Gibbs free energy of formation, ..delta..G/sup 0//sub f,298/, was selected for each solid phase based on the recentness of the tabulated data and on considerations of internal consistency with respect to both the published tabulations and the existing data in WATEQ3. For those solids not included in these published tabulations, Gibbs free energies of formation were calculated from published solubility data (e.g., lepidocrocite), or were estimated (e.g., nontronite) using a free-energy summation method described by Mattigod and Sposito (1978). The accepted or estimated free energies were then combined with internally consistent, ancillary thermodynamic data to calculate equilibrium constants for the hydrolysis reactions of these minerals and related solid phases. Including these values in the WATEQ3 data base increased the competency of this geochemical model in applications associated with the disposal of nuclear waste and retorted oil shale. Additional minerals and related solid phases that need to be added to the solubility submodel will be identified as modeling applications continue in these two programs.

  15. Effects of aqueous effluents from in situ fossil fuel processing technologies on aquatic systems. Annual progress report, January 1-December 31, 1979

    Energy Technology Data Exchange (ETDEWEB)

    Bergman, H.L.

    1980-01-04

    This is the third annual progress report for a continuing EPA-DOE jointly funded project to evaluate the effects of aqueous effluents from in situ fossil-fuel processing technologies on aquatic biota. The project is organized into four project tasks: (1) literature review; (2) process water screening; (3) methods development; and (4) recommendations. Our Bibliography of aquatic ecosystem effects, analytical methods and treatment technologies for organic compounds in advanced fossil-fuel processing effluents was submitted to the EPA for publication. The bibliography contains 1314 citations indexed by chemicals, keywords, taxa and authors. We estimate that the second bibliography volume will contain approximately 1500 citations and be completed in February. We compiled results from several laboratories of inorganic characterizations of 19 process waters: 55 simulated in situ oil-shale retort waters; and Hanna-3, Hanna-4B 01W and Lawrence Livermore Hoe Creek underground coal gasification condenser waters. These process waters were then compared to a published summary of the analyses from 18 simulated in situ oil-shale retort waters. We completed this year 96-h flow-through toxicity bioassays with fathead minnows and rainbow trout and 48-h flow-through bioassays with Daphnia pulicaria exposed to 5 oil-shale process waters, 1 tar-sand process water, 2 underground coal gasification condenser waters, 1 post-gasification backflood condenser water, as well as 2 bioassays with fossil-fuel process water constituents. The LC/sub 50/ toxicity values for these respective species when exposed to these waters are given in detail. (LTN)

  16. High efficiency shale oil recovery

    Energy Technology Data Exchange (ETDEWEB)

    Adams, D.C.

    1993-04-22

    The overall project objective is to demonstrate the high efficiency of the Adams Counter-Current shale oil recovery process. The efficiency will first be demonstrated on a small scale, in the current phase, after which the demonstration will be extended to the operation of a small pilot plant. Thus the immediate project objective is to obtain data on oil shale retorting operations in a small batch rotary kiln that will be representative of operations in the proposed continuous process pilot plant. Although an oil shale batch sample is sealed in the batch kiln from the start until the end of the run, the process conditions for the batch are the same as the conditions that an element of oil shale would encounter in a continuous process kiln. Similar chemical and physical conditions (heating, mixing, pyrolysis, oxidation) exist in both systems.The two most important data objectives in this phase of the project are to demonstrate (1) that the heat recovery projected for this project is reasonable and (2) that an oil shale kiln will run well and not plug up due to sticking and agglomeration. The following was completed this quarter. (1) Twelve pyrolysis runs were made on five different oil shales. All of the runs exhibited a complete absence of any plugging, tendency. Heat transfer for Green River oil shale in the rotary kiln was 84.6 Btu/hr/ft[sup 2]/[degrees]F, and this will provide for ample heat exchange in the Adams kiln. (2) One retorted residue sample was oxidized at 1000[degrees]F. Preliminary indications are that the ash of this run appears to have been completely oxidized. (3) Further minor equipment repairs and improvements were required during the course of the several runs.

  17. High efficiency shale oil recovery. Fifth quarterly report, January 1, 1993--March 31, 1993

    Energy Technology Data Exchange (ETDEWEB)

    Adams, D.C.

    1993-04-22

    The overall project objective is to demonstrate the high efficiency of the Adams Counter-Current shale oil recovery process. The efficiency will first be demonstrated on a small scale, in the current phase, after which the demonstration will be extended to the operation of a small pilot plant. Thus the immediate project objective is to obtain data on oil shale retorting operations in a small batch rotary kiln that will be representative of operations in the proposed continuous process pilot plant. Although an oil shale batch sample is sealed in the batch kiln from the start until the end of the run, the process conditions for the batch are the same as the conditions that an element of oil shale would encounter in a continuous process kiln. Similar chemical and physical conditions (heating, mixing, pyrolysis, oxidation) exist in both systems.The two most important data objectives in this phase of the project are to demonstrate (1) that the heat recovery projected for this project is reasonable and (2) that an oil shale kiln will run well and not plug up due to sticking and agglomeration. The following was completed this quarter. (1) Twelve pyrolysis runs were made on five different oil shales. All of the runs exhibited a complete absence of any plugging, tendency. Heat transfer for Green River oil shale in the rotary kiln was 84.6 Btu/hr/ft{sup 2}/{degrees}F, and this will provide for ample heat exchange in the Adams kiln. (2) One retorted residue sample was oxidized at 1000{degrees}F. Preliminary indications are that the ash of this run appears to have been completely oxidized. (3) Further minor equipment repairs and improvements were required during the course of the several runs.

  18. Trace elements in oil shale. Progress report, 1976--1979

    Energy Technology Data Exchange (ETDEWEB)

    Chappell, W.R.

    1979-01-01

    The overall objective of the program is to evaluate the environmental and health consequences of the release of toxic trace elements (As, B, F, Mo, Se) by shale oil production and use. Some of the particularly significant results are: The baseline geochemical survey shows that stable trace elements maps can be constructed for numerous elements and that the trends observed are related to geologic and climatic factors. Shale retorted by above-ground processes tends to be very homogeneous (both in space and in time) in trace element content. This implies that the number of analytical determinations required of processed shales is not large. Leachate studies show that significant amounts of B, F, And Mo are released from retorted shales and while B and Mo are rapidly flushed out, F is not. On the other hand, As, Se, and most other trace elements ae not present in significant quantities. Significant amounts of F and B are also found in leachates of raw shales. Very large concentrations of reduced sulfur species are found in leachates of processed shale. Upon oxidation a drastic lowering in pH is observed. Preliminary data indicates that this oxidation is catalyzed by bacteria. Very high levels of B and Mo are taken up in some plants growing on processed shale with and without soil cover. These amounts depend upon the process and various site specific characteristics. In general, the amounts taken up decrease with increasing soil cover. On the other hand, we have not observed significant uptake of As, Se, and F into plants. There is a tendency for some trace elements to associate with specific organic fractions, indicating that organic chelation or complexation may play an important role. In particular, most of the Cd, Se, and Cr in shale oil is associated with the organic fraction containing most of the nitrogen-containing compounds.

  19. Reclamation studies on oil shale lands in northwestern Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Cook, C.W.; Redente, E.F.

    1980-02-01

    The overall objective of this project is to study the effects of various reclamation practices on above- and belowground ecosystem development associated with disturbed oil shale lands in northwestern Colorado. Plant growth media that are being used in field test plots include retorted shale, soil over retorted shale, subsoil materials, and surface disturbed topsoils. Some of the more significant results are: (1) a soil cover of at least 61 cm in conjunction with a capiallary barrier provided the best combination of treatments for the establishment of vegetation and a functional microbial community, (2) aboveground production values for native and introduced species mixtures are comparable after three growing seasons, (3) cover values for native species mixtures are generally greater than for introduced species, (4) native seed mixtures, in general, allow greater invasion to occur, (5) sewage sludge at relatively low rates appears to provide the most beneficial overall effect on plant growth, (6) cultural practices, such as irrigated and mulching have significant effects on both above- and belowground ecosystem development, (7) topsoil storage after 1.5 years does not appear to significantly affect general microbial activities but does reduce the mycorrhizal infection potential of the soil at shallow depths, (8) populations of mycorrhizal fungi are decreased on severely disturbed soils if a cover of vegetation is not established, (9) significant biological differences among ecotypes of important shrub species have been identified, (10) a vegetation model is outlined which upon completion will enable the reclamation specialist to predict the plant species combinations best adapted to specific reclamation sites, and (11) synthetic strains of two important grass species are close to development which will provide superior plant materials for reclamation in the West.

  20. EFFECT OF NITRITE AND CITRIC ACID ON THE CHEMICAL COMPOSITION AND pH OF THE CANNED BEEF SAUSAGES

    Directory of Open Access Journals (Sweden)

    M.M.A. MAHA

    2015-01-01

    Full Text Available The effects of nitrite and citric acid as preservatives on the chemical composition and pH of the canned beef sausage were investigated after three months storage at room temperature (35±5ºc. Two experiments were conducted in this study, the first, was undertaken to determine the effect of nitrite as a preservative on the chemical composition and pH of the canned beef sausages retorted at 107.2°C (225ºF for 80 minutes, and at 115.5°C (240ºF for 40 minutes. The second experiment, which was based on the results of the first one, was conducted to determine the effects of the absence of nitrite on the canned beef sausage processed with meat treated by immersion in 1% citric acid before processing at (80 and 30ºc for one minute and drained, then the product retorted at 107.2°C for 80 minutes. The evaluation of percentages of the dry matter, ash, crude protein, fat and also pH were done monthly. The results in experiment 1 indicated that, percentages of the dry matter, ash and crude protein before and after canning of sausages were not significantly different (P>0.05. The fat (% was significantly different among treatments (P0.05 for the raw, cooked and canned sausages. Generally it was observed a decrease in moisture content (increases in dry matter content, ash%, crude protein fat (% and pH value with increasing of storage period. Citric acid had no clear effect on chemical properties and pH value.

  1. Energy Consumption and Greenhouse Gases Emission form Canned Fish Production in Iran a Case Study: Khuzestan Province

    Directory of Open Access Journals (Sweden)

    Abbas Asakereh

    2010-08-01

    Full Text Available Energy is a fundamental ingredient in the process of economic development, as it provides essential services that maintain economic activity and the quality of human life but intensive use of it causes problems threatening public health and environment. The aim of this study was to evaluate energy consumption and greenhouse gases emission from canned fish production in the Khuzestan province, Iran, to determine the losing energy factors and pollutant emission. In this research, canneries, consuming human labor, electricity and diesel fuel energy sources w ere investigated. Total input energy was 22681.8 MJ/t that diesel fuel had the biggest share in the total energy up to 98%. Energy of labour was a small amount of total input energy, but it is the most expensive input in the canned fish production. Primary cooking and sterilization operations are most consumers of input energy in canning fish production with 21202.6 MJ/t. Manual operations of fish cleaning and transferring, includes the lowest energy and this stage includes 43.33% of total human labour. Amount of greenhouse gas and air pollutant emissions from diesel fuel is much greater than electricity in fish cannery. Emission of CO2, NOX and SO2 are the most gas emission with 1071.282, 7.264 and 6.52 Kg/t, respectively. Productivity of labour and electricity, diesel fuel and labour energy were 0.025 t/La 1h and 2.2, 0.044 t/GJ and 0.056 t/MJ, respectively. Using agitating retorts in steed of still retorts and reform path of transferring vapor will decrease the diesel fuel consumption and greenhouse gas emission.

  2. On the Adhocness Standard of Bayesianism and Falsificationism%评贝叶斯主义和证伪主义的特设性标准

    Institute of Scientific and Technical Information of China (English)

    赵晓芬

    2012-01-01

    Duhem Quine topic concerns the dispute between holism and reductionism. From the perspective of holism, the experiment result faces the overall theory with a piece of evidence retorting only a series of hypothesis, then how to retort a single hypothesis with a piece of evidence? Generally, in order to prevent the central theory from criticizing, we will modify the auxiliary hypothesis or add ad hoc hypothesis. Although it is quite easy to estimate specific ad hoc hypothesis by instinct, disputes still exist in the sense of operational standard. This paper intends to evaluate objectively on the different standards and principles of Bayesianism and FalsiFicationism.%迪昂一蒯因问题涉及整体论与还原论之争。按照整体论观点,实验结果面对的是理论整体,一个证据只能反驳一组假设,那么一个证据反驳某一单个假设如何可能?通常的做法是,通过修改辅助性假说或者添加特设性假设的方法来保护中心理论不受指责。虽然特定的特设性假说在直觉上相当容易估计,但对于一般运用的标准还是颇有争议。

  3. Proof-of-Concept Oil Shale Facility Environmental Analysis Program

    Energy Technology Data Exchange (ETDEWEB)

    1990-11-01

    The objectives of the Project are to demonstrate: (1) the Modified In- Situ (MIS) shale oil extraction process and (2) the application of CFBC technology using oil shale, coal and waste gas streams as fuels. The project will focus on evaluating and improving the efficiency and environmental performance of these technologies. The project will be modest by commercial standards. A 17-retort MIS system is planned in which two retorts will be processed simultaneously. Production of 1206-barrels per calendar day of raw shale oil and 46-megawatts of electricity is anticipated. West Virginia University coordinated an Environmental Analysis Program for the Project. Experts from around the country were retained by WVU to prepare individual sections of the report. These experts were exposed to all of OOSI's archives and toured Tract C-b and Logan Wash. Their findings were incorporated into this report. In summary, no environmental obstacles were revealed that would preclude proceeding with the Project. One of the most important objectives of the Project was to verify the environmental acceptability of the technologies being employed. Consequently, special attention will be given to monitoring environmental factors and providing state of the art mitigation measures. Extensive environmental and socioeconomic background information has been compiled for the Tract over the last 15 years and permits were obtained for the large scale operations contemplated in the late 1970's and early 1980's. Those permits have been reviewed and are being modified so that all required permits can be obtained in a timely manner.

  4. Assessment and control of water contamination associated with shale oil extraction and processing. Progress report, October 1, 1979-September 30, 1980

    Energy Technology Data Exchange (ETDEWEB)

    Peterson, E.J.; Henicksman, A.V.; Fox, J.P.; O' Rourke, J.A.; Wagner, P.

    1982-04-01

    The Los Alamos National Laboratory's research on assessment and control of water contamination associated with oil shale operations is directed toward the identification of potential water contamination problems and the evaluation of alternative control strategies for controlling contaminants released into the surface and underground water systems from oil-shale-related sources. Laboratory assessment activities have focused on the mineralogy, trace element concentrations in solids, and leaching characteristics of raw and spent shales from field operations and laboratory-generated spent shales. This report details the chemical, mineralogic, and solution behavior of major, minor, and trace elements in a variety of shale materials (spent shales from Occidental retort 3E at Logan Wash, raw shale from the Colony mine, and laboratory heat-treated shales generated from Colony mine raw shale). Control technology research activities have focused on the definition of control technology requirements based on assessment activities and the laboratory evaluation of alternative control strategies for mitigation of identified problems. Based on results obtained with Logan Wash materials, it appears that the overall impact of in situ processing on groundwater quality (leaching and aquifer bridging) may be less significant than previously believed. Most elements leached from MIS spent shales are already elevated in most groundwaters. Analysis indicates that solubility controls by major cations and anions will aid in mitigating water quality impacts. The exceptions include the trace elements vanadium, lead, and selenium. With respect to in situ retort leaching, process control and multistaged counterflow leaching are evaluated as alternative control strategies for mitigation of quality impacts. The results of these analyses are presented in this report.

  5. Trace elements in oil shale. Progress report, 1979-1980

    Energy Technology Data Exchange (ETDEWEB)

    Chappell, W R

    1980-01-01

    The purpose of this research program is to understand the potential impact of an oil shale industry on environmental levels of trace contaminants in the region. The program involves a comprehensive study of the sources, release mechanisms, transport, fate, and effects of toxic trace chemicals, principally the trace elements, in an oil shale industry. The overall objective of the program is to evaluate the environmental and health consequences of the release of toxic trace elements by shale and oil production and use. The baseline geochemical survey shows that stable trace elements maps can be constructed for numerous elements and that the trends observed are related to geologic and climatic factors. Shale retorted by above-ground processes tends to be very homogeneous (both in space and in time) in trace element content. Leachate studies show that significant amounts of B, F, and Mo are released from retorted shales and while B and Mo are rapidly flushed out, F is not. On the other hand, As, Se, and most other trace elements are not present in significant quantities. Significant amounts of F and B are also found in leachates of raw shales. Very large concentrations of reduced sulfur species are found in leachates of processed shale. Very high levels of B and Mo are taken up in some plants growing on processed shale with and without soil cover. There is a tendency for some trace elements to associate with specific organic fractions, indicating that organic chelation or complexation may play an important role. Many of the so-called standard methods for analyzing trace elements in oil shale-related materials are inadequate. A sampling manual is being written for the environmental scientist and practicing engineer. A new combination of methods is developed for separating the minerals in oil shale into different density fractions. Microbial investigations have tentatively identified the existence of thiobacilli in oil shale materials such as leachates. (DC)

  6. Water resources and potential hydrologic effects of oil-shale development in the southeastern Uinta Basin, Utah and Colorado

    Science.gov (United States)

    Lindskov, K.L.; Kimball, B.A.

    1984-01-01

    withdrawal to about 20,000 acre-feet per year.An oil-shale industry in the southeastern Uinta Basin with a peak production of 400,000 barrels of oil per day would require a water supply of about 70,000 acre-feet per year. Sources of water supply considered for such an industry were: diversion from the natural flow of the White River, a proposed reservoir on the White River, diversion from the White River combined with proposed off-stream storage in Hells Hole Canyon, diversion from the Green River, and conjunctive use of ground and surface water.The proposed reservoir on the White River would trap about 90 percent of the sediment moving in the river and in turn would release almost sediment-free water. Possible impacts are changes in channel gradient in the downstream 18 miles of the White River and changes in bank stability. In some parts of the area, annual sheet-erosion rates are as great as 2.2 acre-feet per square mile but sediment yield to the White River is less than might be expected because the runoff is small. If process water from retort operations or water used in the construction of surface facilities is discharged into a normally dry streambed, increased channel erosion and sediment in tributary streams could result in increased sediment loads in the White River. In addition, sediment yields from retorted-shale piles with minimum slopes could exceed 0.1 acrefoot per square mile during a common storm. Thus, without safeguards, the useful life of any proposed reservoir or holding pond could be decreased considerably.Leachate water from retorted-shale piles has large concentrations of sodium and sulfate, and the chemical composition of retort waters differs considerably from that of the natural waters of the area. The retort waters contain a greater concentration of dissolved solids and more organic carbon and nutrients. Without proper disposal or impoundment of retort and leachate waters, the salinity of downstream waters in the Colorado River Basin would be

  7. CO2 Sequestration within Spent Oil Shale

    Science.gov (United States)

    Foster, H.; Worrall, F.; Gluyas, J.; Morgan, C.; Fraser, J.

    2013-12-01

    Worldwide deposits of oil shales are thought to represent ~3 trillion barrels of oil. Jordanian oil shale deposits are extensive and of high quality, and could represent 100 billion barrels of oil, leading to much interest and activity in the development of these deposits. The exploitation of oil shales has raised a number of environmental concerns including: land use, waste disposal, water consumption, and greenhouse gas emissions. The dry retorting of oil shales can overcome a number of the environmental impacts, but this leaves concerns over management of spent oil shale and CO2 production. In this study we propose that the spent oil shale can be used to sequester CO2 from the retorting process. Here we show that by conducting experiments using high pressure reaction facilities, we can achieve successful carbonation of spent oil shale. High pressure reactor facilities in the Department of Earth Sciences, Durham University, are capable of reacting solids with a range of fluids up to 15 MPa and 350°C, being specially designed for research with supercritical fluids. Jordanian spent oil shale was reacted with high pressure CO2 in order to assess whether there is potential for sequestration. Fresh and reacted materials were then examined by: Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Thermogravimetric Analysis (TGA), X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD) methods. Jordanian spent oil shale was found to sequester up to 5.8 wt % CO2, on reacting under supercritical conditions, which is 90% of the theoretical carbonation. Jordanian spent oil shale is composed of a large proportion of CaCO3, which on retorting decomposes, forming CaSO4 and Ca-oxides which are the focus of carbonation reactions. A factorially designed experiment was used to test different factors on the extent of carbonation, including: pressure; temperature; duration; and the water content. Analysis of Variance (ANOVA) techniques were then used to determine the significance of

  8. Integration of Product, Package, Process, and Environment: A Food System Optimization

    Science.gov (United States)

    Cooper, Maya R.; Douglas, Grace L.

    2015-01-01

    The food systems slated for future NASA missions must meet crew nutritional needs, be acceptable for consumption, and use resources efficiently. Although the current food system of prepackaged, moderately stabilized food items works well for International Space Station (ISS) missions, many of the current space menu items do not maintain acceptability and/or nutritive value beyond 2 years. Longer space missions require that the food system can sustain the crew for 3 to 5 years without replenishment. The task "Integration of Product, Package, Process, and Environment: A Food System Optimization" has the objective of optimizing food-product shelf life for the space-food system through product recipe adjustments, new packaging and processing technologies, and modified storage conditions. Two emergent food processing technologies were examined to identify a pathway to stable, wet-pack foods without the detrimental color and texture effects. Both microwave-assisted thermal sterilization (MATS) and pressure-assisted thermal stabilization (PATS) were evaluated against traditional retort processing to determine if lower heat inputs during processing would produce a product with higher micronutrient quality and longer shelf life. While MATS products did have brighter color and better texture initially, the advantages were not sustained. The non-metallized packaging film used in the process likely provided inadequate oxygen barrier. No difference in vitamin stability was evident between MATS and retort processed foods. Similarly, fruit products produced using PATS showed improved color and texture through 3 years of storage compared to retort fruit, but the vitamin stability was not improved. The final processing study involved freeze drying. Five processing factors were tested in factorial design to assess potential impact of each to the quality of freeze-dried food, including the integrity of the microstructure. The initial freezing rate and primary freeze drying

  9. COMPARAÇÃO ENTRE TÉCNICAS NUMÉRICAS PARA A RESOLUÇÃO DO PROBLEMA DE TRANSFERÊNCIA DE CALOR EM ALIMENTOS ENLATADOS

    Directory of Open Access Journals (Sweden)

    A.D. RODRIGUES

    1998-05-01

    Full Text Available Este trabalho apresenta a comparação das técnicas de resolução numérica de Diferenças Finitas e Runge-Kutta-Gill de 4a ordem com passo de integração variável para a simulação do modelo de transferência de calor em regime transiente bidimensional em coordenadas cilíndricas e unidimensional em coordenadas esféricas, aplicado a alimentos enlatados processados em autoclave, observando-se a rapidez e a precisão de integração comparados aos perfis reais de tempo/temperatura, incluindo desvios de processo. Além disso, uma análise de sensibilidade paramétrica na difusividade térmica foi realizada na tentativa de quantificar a influência que essa propriedade possui na resolução numérica. Para tanto, foram realizados ensaios de penetração de calor em autoclave a vapor, utilizando-se latas cilíndricas de 75x90 e 100x110 contendo simulantes de alimentos com características de aquecimento por condução e convecção.This work presents a comparison of the integration quickness and precision between the techniques of numerical resolution of Finite Differences and Runge-Kutta-Gill of fourth order with variable integration pass, to do simulation of the unsteady-state heat transfer model, two-dimensional in cylindrical coordinates and one-dimensional in spherical coordinates, applied to canned foods processed in retorts, showing advantages for the technique of Runge-Kutta-Gill. It was also accomplished a parametric sensitivity analysis in the thermal diffusivity indicating a great influence of this parameter in the numerical solution. The mathematical simulation were compared with results of real heat penetration tests done in steam retort, using cylindrical cans filled with bentonite suspensions simulating foods with heat characteristics resembling heat conduction and heat convection.

  10. Alloying of titanium by oxygen during chamber electroslag remelting/Legiranje titanijuma kiseonikom u peći za elektropretapanje pod troskom

    Directory of Open Access Journals (Sweden)

    Anatoliy D. Ryabtsev

    2014-10-01

    Full Text Available The paper presents the results of alloying titanium by oxygen in the process of chamber electroslag remelting. As an oxygen-containing ligature, we used the electrodes-satellite from the reaction mass residues mixture from the retort lid for magnesium thermal reduction of a titanium sponge, a specially prepared gaseous argon oxygen mixture containing 30% oxygen applied directly to the melting space, microsize (10-15 mm powder particles of titanium oxide and titanium oxide nanopowder with a particle size of 21 ± 5 nm. The structure and the properties of titanium alloyed by oxygen from the oxygen-containing ligature, gas phase and titanium oxide powder during chamber electroslag remelting of the titanium sponge are investigated. It was found that at the oxygen content of 0.053%mas. to 0.22%mas. in the metal formed a homogeneous single-phase structure typical for commercial titanium formed by polyhedral grains of the α-phase. The increase of the oxygen concentration in titanium for more than 0.22%mas. leads to the formation of the microstructure with a typical needle structure, which allows it to be classified as the α ׳-phase. / U radu su prikazani rezultati legiranja titanijuma kiseonikom u procesu elektropretapanja pod troskom u peći. Za vezivo, koje sadrzi kiseonik, korišćene su satelit elektrode iz reakcije masenih ostataka mešavine iz poklopca retorte za termalnu redukciju magnezijumtitanijumskog sunđera, specijalno pripremljena mešavina gasa argona i kiseonika sa 30% kiseonika primenjena direktno na mesto topljenja, čestice praha titanijum-oksida mikroveličine 10-15mm i nanoprah titanijum-oksida veličine čestica od 21± 5 nm. Ispitane su struktura i karakteristike titanijuma legiranog kiseonikom iz veziva , gasne faze i praha titanijum-oksida tokom elektropretapanja titanijumovog sunđera pod troskom u peći. Utvrđeno je da se pri sadržaju kiseonika od 0.053%mas.do 0.22%mas. u metalu formira homogena jednofazna struktura tipi

  11. Migration of melamine from can coatings cross-linked with melamine-based resins, into food simulants and foods.

    Science.gov (United States)

    Bradley, E L; Castle, L; Day, J S; Leak, J

    2011-02-01

    Resins based on melamine-formaldehyde and related analogues such as methylolated melamine are used to cross-link coatings used inside food cans and on the metal closures of glass jars. Thirteen commercially coated cans and closures representing 80% of the European market were tested using simulants under realistic industrial heat-processing conditions for canned and jarred foods. The food simulants and the retort conditions used were 3% acetic acid for 1 h at 100 °C and 10% ethanol for 1 h at 130 °C. The highest migration level seen for melamine into simulant was 332 µg kg⁻¹. There was no detectable migration of the melamine analogues cyanuric acid (food simulant and foods themselves were then conducted using two experimental coatings made using amino-based cross-linking resins. Coated metal panels were exposed to the food simulant 10% (v/v) aqueous ethanol and to three foodstuffs under a range of time and temperature conditions both in the laboratory and in a commercial food canning facility using proprietary time and temperature conditions. The highest migration into a food was 152 µg kg⁻¹ from the first coating processed for a long time at a moderate sterilisation temperature. The highest migration into simulant was also from this coating at 220 µg kg⁻¹ when processed at 134 °C for 60 min, dropping to 190 µg k⁻¹ when processed at 123 °C for 70 min. Migration from the second coating was quite uniformly two to three times lower under all tests. These migration results were significantly higher than the levels of melamine extractable using 95% ethanol at room temperature. The experiments show that commercial canning and retorting can be mimicked in an acceptable way using laboratory tests with an autoclave or a simple pressure cooker. The results overall show there is hydrolytic degradation of the melamine cross-linked resins to release additional melamine. There is a strong influence of the temperature of heat treatment applied with foods or

  12. Abrasion and erosion testing of materials used in power production from coal

    Energy Technology Data Exchange (ETDEWEB)

    Tylczak, Joseph H.; Adler, Thomas A.; Rawers, James C.

    2003-09-01

    The Albany Research Center (ARC) has a long history of studying abrasive wear, related to mineral testing, handling, and processing. The center has also been instrumental in the design and development of wear test procedures and equipment. Research capabilities at ARC include Pin-on-Drum, Pin-on-Disk, and Dry Sand/Rubber Wheel abrasion tests, Jaw Crusher gouging test, Ball-on-Ball Impact test, and Jet erosion tests. Abrasive and erosive wear studies have been used to develop both new alloys and improved heat treatments of commercial alloys. As part of ARC’s newest iteration on wear testing to evaluate materials for use in new and existing pulverized coal combustion and gasifier power systems, the ARC has designed and constructed a new High Temperature Hostile Atmosphere Erosion Wear Test (HAET). This new piece of test apparatus is designed for erosive particle velocities of 10-40 m/sec and temperatures from room temperature (23°C) to 800+°C, with special control over the gas atmosphere. A variable speed whirling arm design is used to vary the impact energy of the gravity fed erosive particles. The specimens are mounted at the edge of a disk and allow a full range of impingement angles to be selected. An electric furnace heats the specimens in an enclosed retort to the selected temperature. Tests include both oxidizing conditions and reducing conditions. A range of gases, including CO, CO2, CH4, H2, H2S, HCl, N2, O2, and SO2 can be mixed and delivered to the retort. During the erosion testing a stream of abrasive powder is delivered in front of the specimens. This apparatus is designed to use low abrasive fluxes, which simulate real operating conditions in commercial power plants. Currently ~270 μm SiO2 particles are being used to simulate the abrasive impurities typically found in coal. Since operators are always striving for longer lifetimes and higher operating temperatures, this apparatus can help elucidate mechanisms of wastage and identify superior

  13. Introducing the concept of critical Fo in batch heat processing Introduzindo o conceito de Fo crítico no processamento térmico em batelada

    Directory of Open Access Journals (Sweden)

    Homero Ferracini Gumerato

    2009-12-01

    Full Text Available The determination of the sterilization value for low acid foods in retorts includes a critical evaluation of the factory's facilities and utilities, validation of the heat processing equipment (by heat distribution assays, and finally heat penetration assays with the product. The intensity of the heat process applied to the food can be expressed by the Fo value (sterilization value, in minutes, at a reference temperature of 121.1 °C, and a thermal index, z, of 10 °C, for Clostridium botulinum spores. For safety reasons, the lowest value for Fo is frequently adopted, being obtained in heat penetration assays as indicative of the minimum process intensity applied. This lowest Fo value should always be higher than the minimum Fo recommended for the food in question. However, the use of the Fo value for the coldest can fail to statistically explain all the practical occurrences in food heat treatment processes. Thus, as a result of intense experimental work, we aimed to develop a new focus to determine the lowest Fo value, which we renamed the critical Fo. The critical Fo is based on a statistical model for the interpretation of the results of heat penetration assays in packages, and it depends not only on the Fo values found at the coldest point of the package and the coldest point of the equipment, but also on the size of the batch of packages processed in the retort, the total processing time in the retort, and the time between CIPs of the retort. In the present study, we tried to explore the results of physical measurements used in the validation of food heat processes. Three examples of calculations were prepared to illustrate the methodology developed and to introduce the concept of critical Fo for the processing of canned food.A determinação do valor de esterilização de alimentos de baixa acidez em autoclaves compreende uma minuciosa avaliação das instalações e utilidades da fábrica, uma validação do equipamento de processo t

  14. Unpacking intoxication, racialising disability.

    Science.gov (United States)

    Chen, Mel Y

    2015-06-01

    This article examines concepts whose strictly medical applications have only partly informed their widespread use and suggests that demonstrably shared logics motivate our thinking across domains in the interest of a politically just engagement. It considers exchanges between the culturally complex concepts of 'toxicity' and 'intoxication', assessing the racialised conditions of their animation in several geopolitically--and quite radically--distinct scenarios. First, the article sets the framework through considering the racial implications of impairment and disability language of 'non-toxic' finance capital in the contemporary US financial crisis. Shifting material foci from 'illiquid financial bodies' to opiates while insisting that neither is 'more' metaphorically toxic than the other, the article turns to address the role of opium and temporality in the interanimations of race and disability in two sites of 19th-century British empire: Langdon Down's clinic for idiocy, and China's retort on opium to Queen Victoria. The article concludes with a provocation that suggests yet another crossing of borders, that between researcher and researched: 'intoxicated method' is a hypothetical mode of approach that refuses idealised research positions by 'critically disabling' the idealised cognitive and conceptual lens of analysis. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  15. Preparation of aluminide coatings at relatively low temperatures

    Institute of Scientific and Technical Information of China (English)

    ZHAN Zhao-lin; HE Ye-dong; WANG De-ren; GAO Wei

    2006-01-01

    A method was presented to prepare aluminide coatings on metals by combining the pack aluminizing with the ball impact process. This technique applied mechanical vibration to a retort, which was loaded with pack-aluminizing powder, specimens and alloy balls. Pack aluminizing was carried out with repeated ball impact, which accelerated chemical reactions and atomic diffusion.Aluminide coatings were formed at a relatively lower temperature (below 600 ℃) and in a shorter treatment time, compared with the conventional pack aluminizing. The effects of the operation temperature and the treatment time on the formation of the coatings were analysed. The SEM, EDS and XRD analysis results show that the aluminide coatings appear to be homogeneous, with a high density and free of porosity, and have excellent adherence to the substrate. The coatings mainly consist of Al-rich phases such as η-Fe2Al5,θ-FeAl3 and CrAl5. Oxidation resistance was studied by high-temperature tests. The formation mechanism of the Al-coatings was also investigated. This technique provides a new approach for industrial diffusion coatings with great energy and time savings.

  16. The Darwins and Wells: from revolution to evolution.

    Science.gov (United States)

    Wade, Nicholas J

    2010-04-01

    In the biography of his grandfather (Erasmus Darwin), Charles Darwin hinted that his father (Robert Darwin) had received parental assistance in conducting and writing his medical thesis (which concerned afterimages). The experiments also involved visual vertigo, and they were elaborated by the senior Darwin in his Zoonomia, published in 1794. Erasmus Darwin's interpretation was in terms of trying to pursue peripheral afterimages formed during rotation; it was at variance with one published two years earlier by William Charles Wells, who had investigated the visual consequences of body rotation when the body is subsequently still. Wells penned two retorts to the Darwins' theory; although they were not accepted by Erasmus, he did devise a human centrifuge, models of which were employed in later studies of vertigo. Wells's ideas on evolution were expressed in a paper delivered to the Royal Society (in 1813) but not published in its Transactions. Commenting on the case of a white woman, part of whose skin was black, he proposed a process of change that was akin to natural selection. His ideas were acknowledged by Charles Darwin in the fourth edition of On the Origin of Species.

  17. [Applicability of PCR methods for detection of shrimp and crab in processed food].

    Science.gov (United States)

    Taguchi, Hiromu; Nagatomi, Yasuaki; Kikuchi, Ryo; Hirao, Takashi

    2014-01-01

    According to Japanese food allergen labeling regulations, an ELISA screening test is used for detection of crustacean proteins in food and a shrimp/crab-PCR confirmation test is used to confirm a positive ELISA screening test and to exclude false positives. Forty-six kinds of processed foods labeled as containing shrimp/crab were subjected to ELISA screening test and PCR confirmation test and the usefulness of the shrimp/crab-PCR was evaluated. Twenty-seven of the 46 samples contained total crustacean protein levels of 10 ppm or more in the ELISA screening test. All of the samples were positive in the shrimp/crab-PCR confirmation test. The results of the confirmation test were consistent with the declaration in the list of ingredients and with the results of the ELISA screening test. The shrimp/crab-PCR confirmation test was demonstrated to be applicable to various kinds of foods, including powder, extract, seasoning paste, prepared frozen food, snack food, retort food and canned food.

  18. 1985 technical coefficients for inputs to energy technologies

    Energy Technology Data Exchange (ETDEWEB)

    Lukachinski, J.; Tessmer, R.G. Jr.

    1976-06-01

    This report describes the incorporation of input--output technical coefficients for five new energy supply and conversion technologies as estimated by the MITRE Corporation into a 110-sector Energy I--O Model. The five new technologies are solvent refining of coal, oil shale mining and retorting, high-temperature gas-cooled reactor electricity generation, high-BTU coal gasification, and COGAS combined-cycle electricity generation. Incorporation of seven existing energy supply and conversion technologies is also described: crude oil and gas extraction, coal mining, refined petroleum products, pipeline gas, fossil electric generation, and hydroelectric generation. Non-energy input coefficients are given in units of 1967 $/10/sup 6/ BTU and represent the inputs in constant 1967 dollars from non-energy sectors (e.g. manufacturing, transportation, services) required per 10/sup 6/ BTU of energy production by each of these energy supply technologies. The 90 non-energy sectors included are based on the Bureau of Economic Analysis 83 sector input--output structure for 1967 with minor disaggregations. Energy input coefficients are given in units of BTU/BTU.

  19. Recycling of Zinc- and Lead-Bearing Residues with Pyrolysis Gas

    Science.gov (United States)

    Pichler, C.; Antrekowitsch, J.

    2015-09-01

    Efforts in the metallurgical industry for an approximation to the zero waste concept has led to many different investigations. Together with the greenhouse effect, CO2 emissions have caused additional costs for different process steps in the industry. For this reason, alternative carbon carriers have been sought, and charcoal was found to be an ideal substitute, due to its CO2 neutrality. In order to use it in the metallurgical industry, an optimization of the charcoal production through a carbonization process must be carried out. Beside the charcoal, pyrolysis gas also occurs during the heating of wood or agricultural wastes under the exclusion of air. Because of combustible compounds in this gas, it is possible to use it as a reduction agent instead of fossil carbon carriers. Together with the idea of preventing landfilling of metallurgical by-products, an investigation was carried out to treat zinc- and lead-containing materials. For this issue a special process concept was designed and developed. The main aspect was to recycle the zinc- and lead-containing Waelz slag, which results from the processing of steel mill dusts, in a vertical retort. Two different sizes of facilities were constructed to perform the reaction system of the solid Waelz slag with the gaseous reduction agent of pyrolysis gas.

  20. Efeito da ativação química nas propriedades de superfície de xisto retortado

    Directory of Open Access Journals (Sweden)

    Marta Eliane Doumer

    2016-05-01

    Full Text Available A pyrolyzed oil shale by-product known as retorted shale was functionalized with HCl, HNO3, H2SO4, H3PO4, HNO3/H2SO4 (3:1, Fenton's reagent, (NH42S2O7, NaOH, and KMnO4 using either ultrasound (Route 1 or reflux (Route 2. The products obtained were evaluated in terms of cation exchange capacity (CEC. Structural characterization was performed using X-ray diffraction, X-ray fluorescence, and infrared spectroscopy to identify the functional groups present. The best results were achieved using Route 2 with solutions of either H3PO4 or HNO3/H2SO4 (3:1, giving CEC values of 315 and 316 mmolc kg-1, respectively. The pyrolyzed oil shale functionalized using Route 2 (reflux with NaOH as the activating agent showed the highest sorption of methylene blue (35.6 mg g-1. The main mechanisms observed for oil shale by-product functionalization were oxidation, nitration, and CaO leaching.

  1. Iodine Contents in Baby Food Consumed in Japan

    Directory of Open Access Journals (Sweden)

    Yoshida M.

    2013-04-01

    Full Text Available To evaluate iodine intake in Japanese infants, iodine contents were determined in both commercial and homemade baby food samples consumed in Japan. Fifty-three samples of commercial bottled or retort baby food and 25 samples of homemade baby food for one day were collected and their iodine contents were determined by inductively coupled plasma mass spectrometry after an extraction with 0.5% tetramethylammonium hydroxide. Among the commercial baby food samples, 35 samples showed low iodine values ( 1000 ng/g wet weight. Significantly higher iodine values were observed in 15 samples composed of dishes cooked using kombu (a kind of kelp than other samples. Among the homemade baby food samples, 12 samples brought very low iodine intake (< 1- 24 μg/d, while 5 samples brought very high iodine intake (283-978 μg/d. These results indicate that intermittent high iodine baby food including dishes cooked using kombu contributes to sufficient iodine intake in Japanese infants.

  2. Modeling of hydrologic conditions and solute movement in processed oil shale waste embankments under simulated climatic conditions

    Energy Technology Data Exchange (ETDEWEB)

    Reeves, T.L.; Turner, J.P.; Hasfurther, V.R.; Skinner, Q.D.

    1992-06-01

    The scope of this program is to study interacting hydrologic, geotechnical, and chemical factors affecting the behavior and disposal of combusted processed oil shale. The research combines bench-scale testing with large scale research sufficient to describe commercial scale embankment behavior. The large scale approach was accomplished by establishing five lysimeters, each 7.3 [times] 3.0 [times] 3.0 m deep, filled with processed oil shale that has been retorted and combusted by the Lurgi-Ruhrgas (Lurgi) process. Approximately 400 tons of Lurgi processed oil shale waste was provided by RBOSC to carry out this study. Research objectives were designed to evaluate hydrologic, geotechnical, and chemical properties and conditions which would affect the design and performance of large-scale embankments. The objectives of this research are: assess the unsaturated movement and redistribution of water and the development of potential saturated zones and drainage in disposed processed oil shale under natural and simulated climatic conditions; assess the unsaturated movement of solubles and major chemical constituents in disposed processed oil shale under natural and simulated climatic conditions; assess the physical and constitutive properties of the processed oil shale and determine potential changes in these properties caused by disposal and weathering by natural and simulated climatic conditions; assess the use of previously developed computer model(s) to describe the infiltration, unsaturated movement, redistribution, and drainage of water in disposed processed oil shale; evaluate the stability of field scale processed oil shale solid waste embankments using computer models.

  3. Modeling of hydrologic conditions and solute movement in processed oil shale waste embankments under simulated climatic conditions

    Energy Technology Data Exchange (ETDEWEB)

    Reeves, T.L.; Turner, J.P.; Hasfurther, V.R.; Skinner, Q.D.

    1992-06-01

    The scope of this program is to study interacting hydrologic, geotechnical, and chemical factors affecting the behavior and disposal of combusted processed oil shale. The research combines bench-scale testing with large scale research sufficient to describe commercial scale embankment behavior. The large scale approach was accomplished by establishing five lysimeters, each 7.3 {times} 3.0 {times} 3.0 m deep, filled with processed oil shale that has been retorted and combusted by the Lurgi-Ruhrgas (Lurgi) process. Approximately 400 tons of Lurgi processed oil shale waste was provided by RBOSC to carry out this study. Research objectives were designed to evaluate hydrologic, geotechnical, and chemical properties and conditions which would affect the design and performance of large-scale embankments. The objectives of this research are: assess the unsaturated movement and redistribution of water and the development of potential saturated zones and drainage in disposed processed oil shale under natural and simulated climatic conditions; assess the unsaturated movement of solubles and major chemical constituents in disposed processed oil shale under natural and simulated climatic conditions; assess the physical and constitutive properties of the processed oil shale and determine potential changes in these properties caused by disposal and weathering by natural and simulated climatic conditions; assess the use of previously developed computer model(s) to describe the infiltration, unsaturated movement, redistribution, and drainage of water in disposed processed oil shale; evaluate the stability of field scale processed oil shale solid waste embankments using computer models.

  4. Occupational health and environment research 1983: Health, Safety, and Environment Division. Progress report

    Energy Technology Data Exchange (ETDEWEB)

    Voelz, G.L. (comp.)

    1985-05-01

    The primary responsibility of the Health, Safety, and Environment (HSE) Division at the Los Alamos National Laboratory is to provide comprehensive occupational health and safety programs, waste processing, and environmental protection. These activities are designed to protect the workers, the public, and the environment. Evaluation of respiratory protective equipment included the XM-30 and M17A1 military masks, use of MAG-1 spectacles in respirators, and eight self-contained units. The latter units were used in an evaluation of test procedures used for Bureau of Mines approval of breathing apparatuses. Analyses of air samples from field studies of a modified in situ oil shale retorting facility were performed for total cyclohexane extractables and selected polynuclear aromatic hydrocarbons. Aerosols generation and characterization of effluents from oil shale processing were continued as part of an inhalation toxicology study. Additional data on plutonium excretion in urine are presented and point up problems in using the Langham equation to predict plutonium deposition in the body from long-term excretion data. Environmental surveillance at Los Alamos during 1983 showed the highest estimated radiation dose from Laboratory operations to be about 26% of the natural background radiation dose. Several studies on radionuclides and their transport in the Los Alamos environment are described. The chemical quality of surface and ground water near the geothermal hot dry rock facility is described. Short- and long-term consequences to man from releases of radionuclides into the environment can be simulated by the BIOTRAN computer model, which is discussed brirfly.

  5. Fixed-bed pyrolysis and hydropyrolysis of sunflower bagasse: product yields and compositions

    Energy Technology Data Exchange (ETDEWEB)

    Putun, A.E.; Kockar, O.M.; Yorgun, S.; Gercel, H.F.; Andresen, J.; Snape, C.E.; Putun, E. [Anadolu University, Eskisehir (Turkey). Dept. of Chemistry

    1996-01-01

    Pyrolysis and hydropyrolysis experiments at different temperatures, heating rates and pressures have been conducted on a sample of sunflower pressed bagasse to investigate the effect of particle size, sweep gas velocity, and hydrogen pressure on the product yields and characteristics. In contrast to coal and oil shales, char and oil yields from sunflower pressed bagasse were found to be largely independent of particle size and sweep gas velocity in a Heinze retort with the oil yield of {approx} 40% w/w being the same as that from a well-swept fixed-bed reactor in which a much smaller sample size was used. The use of high hydrogen pressure ({gt} 50 bar) increased the oil yields by up to {approx} 10% w/w but these increases are much greater when expressed on a carbon basis due to the reduced oxygen contents of the oils. Even at low pressure, it has been estimated that {approx} 40% of the carbon aromatized during pyrolysis. 25 refs., 12 figs., 5 tabs.

  6. Pressurized fluidized-bed hydroretorting of eastern oil shales. Volume 4, Task 5, Operation of PFH on beneficiated shale, Task 6, Environmental data and mitigation analyses and Task 7, Sample procurement, preparation, and characterization: Final report, September 1987--May 1991

    Energy Technology Data Exchange (ETDEWEB)

    1992-03-01

    The objective of Task 5 (Operation of Pressurized Fluidized-Bed Hydro-Retorting (PFH) on Beneficiated Shale) was to modify the PFH process to facilitate its use for fine-sized, beneficiated Eastern shales. This task was divided into 3 subtasks: Non-Reactive Testing, Reactive Testing, and Data Analysis and Correlations. The potential environment impacts of PFH processing of oil shale must be assessed throughout the development program to ensure that the appropriate technologies are in place to mitigate any adverse effects. The overall objectives of Task 6 (Environmental Data and Mitigation Analyses) were to obtain environmental data relating to PFH and shale beneficiation and to analyze the potential environmental impacts of the integrated PFH process. The task was divided into the following four subtasks. Characterization of Processed Shales (IGT), 6.2. Water Availability and Treatment Studies, 6.3. Heavy Metals Removal and 6.4. PFH Systems Analysis. The objective of Task 7 (Sample Procurement, Preparation, and Characterization) was to procure, prepare, and characterize raw and beneficiated bulk samples of Eastern oil shale for all of the experimental tasks in the program. Accomplishments for these tasks are presented.

  7. Electric ignition and airless kindle for underfeed stokers

    Energy Technology Data Exchange (ETDEWEB)

    Crowther, M.E. [CRE Group Ltd., Stoke Orchard (United Kingdom)

    1996-02-01

    The leaflet describes a project carried out to assess the effectiveness and reliability of two methods of reducing the amount of coal used for kindling on boilers fitted with underfeed stokers. Many coal-fired boilers use underfeed stokers to deliver their fuel. When heat is not required, the stoker is put into standby `kindle` mode, and the fire kept alight by the periodic delivery of small amounts of coal and air. CRE Group Ltd., assessed two techniques for reducing the fuel used for kindling: electric ignition and airless kindle. Electric ignition eliminates entirely the need for kindling by automatically re-igniting the coal in the stoker retort using a hot air jet. CRE Group`s development work aimed to overcome earlier design problems and improve cost-effectiveness and reliability. Airless kindle reduces the size and frequency of coal feed in kindle mode. Although it does not entirely eliminate the use of kindle, it saves almost as much fuel for a lower capital outlay and minimal maintenance costs. This option has proved so attractive to the host organisations (Derbyshire Country Council, Nottinghamshire Country Council and Haven Nurseries) that the boiler used for trials for the electric ignition system has now been converted to airless kindle. 3 figs., 4 photos.

  8. Pyrolysis Gas as a Renewable Reducing Agent for the Recycling of Zinc- and Lead-Bearing Residues: A Status Report

    Science.gov (United States)

    Pichler, C.; Antrekowitsch, J.

    2017-04-01

    The topic "Zero Waste" has been in existence for several years in the industry, and the metallurgical industry has also made efforts to reduce the amounts of residues occurring and have started several investigations to cut down on metallurgical by-products which have to be landfilled. Especially, the additional costs for CO2 emissions in different metallurgical steps have led to investigations into alternative carbon carriers. Charcoal has been identified to serve as an ideal substitute due its CO2-neutrality. For the applications of this renewable carbon carrier in metallurgical processes, charcoal production by means of a carbonization process needs to be optimized. As a by-product during the heating of agricultural wastes or wood by excluding air, pyrolysis gas occurs. Due to the existence of combustible compounds in this gas, an application as a reduction agent instead of fossil carbon carriers in metallurgy is possible. Based on the prevention of dumping metallurgical by-products, an investigation has been developed to treat zinc- and lead-containing materials. To realize this, a dedicated process concept has been designed and developed. As the main focuses, the usage of the pyrolysis gas from charcoal production for the Waelz kiln process and the recycling of zinc- and lead-containing Waelz slag, resulting from the processing of steel mill dust in a vertical retort, have to be mentioned. Within this research, the process concept was executed from laboratory-scale up to pilot-scale testing, described in this article.

  9. A Novel Energy-Efficient Pyrolysis Process: Self-pyrolysis of Oil Shale Triggered by Topochemical Heat in a Horizontal Fixed Bed

    Science.gov (United States)

    Sun, You-Hong; Bai, Feng-Tian; Lü, Xiao-Shu; Li, Qiang; Liu, Yu-Min; Guo, Ming-Yi; Guo, Wei; Liu, Bao-Chang

    2015-01-01

    This paper proposes a novel energy-efficient oil shale pyrolysis process triggered by a topochemical reaction that can be applied in horizontal oil shale formations. The process starts by feeding preheated air to oil shale to initiate a topochemical reaction and the onset of self-pyrolysis. As the temperature in the virgin oil shale increases (to 250–300°C), the hot air can be replaced by ambient-temperature air, allowing heat to be released by internal topochemical reactions to complete the pyrolysis. The propagation of fronts formed in this process, the temperature evolution, and the reaction mechanism of oil shale pyrolysis in porous media are discussed and compared with those in a traditional oxygen-free process. The results show that the self-pyrolysis of oil shale can be achieved with the proposed method without any need for external heat. The results also verify that fractured oil shale may be more suitable for underground retorting. Moreover, the gas and liquid products from this method were characterised, and a highly instrumented experimental device designed specifically for this process is described. This study can serve as a reference for new ideas on oil shale in situ pyrolysis processes. PMID:25656294

  10. Photobiomodulation (PBM) Applications in Ophthalmology

    Science.gov (United States)

    Dotson, Robert

    2011-03-01

    In a very real sense, we are all creatures of light. This fact is just now beginning to impact medicine, as quantum theory begins to spread outside the confines of physics and into the life sciences. No longer can living organisms simply be viewed as retorts for biochemical reactions. They also demonstrate an energy component that will prove to be the unifying force of life in all its varied forms. With the advent of this shift in the life sciences, light is becoming an increasingly important diagnostic and therapeutic tool within medicine. Ophthalmologists have long been concerned with light and its application and, consequently, have an interest in the coming scientific revolution, photomedicine. A brief history of the use of low energy light for healing, a review of known mechanisms by which photons interact with living cells, and a review of some of the established cellular effects will be presented. Finally, brief clinical studies will be presented illustrating the benefits of PBM - specifically regarding: corneal healing, glaucoma, and dry age-related macular degeneration. The purpose of this talk is to introduce the emerging field of PBM to the physics community at large.

  11. Optimization of Multilayer Laminated Film and Absorbent of Vacuum Insulation Panel for Use at High Temperature

    Science.gov (United States)

    Araki, Kuninari; Echigoya, Wataru; Tsuruga, Toshimitsu; Kamoto, Daigorou; Matsuoka, Shin-Ichi

    For the energy saving regulation and larger capacity, Vacuum Insulation Panel (VIP) has been used in refrigerators with urethane foam in recent years. VIP for low temperature is constructed by laminated plastic film, using heat welding of each neighboring part for keeping vacuum, so that the performance decrement is very large under high temperature. But recently high efficiency insulation material is desired for high temperature water holding devices (automatic vending machine, heat pump water heater, electric hot-water pot water, etc.), and we especially focused on cost and ability of the laminated plastic film and absorbent for high temperature VIP. We measured the heatproof temperature of plastic films and checked the amount of water vapor and out coming gas on temperature-programmed adsorption in absorbent. These results suggest the suitable laminated film and absorbent system for VIP use at high temperature, and the long-term reliability was evaluated by measuring thermal conductivity of high temperature. As a result it was found that high-retort pouch of CPP (cast polypropylene film) and adding of aluminum coating are the most suitable materials for use in the welded layers of high-temperature VIPs (105°C).

  12. Clean diffusion coatings by chemical vapor deposition

    Energy Technology Data Exchange (ETDEWEB)

    Warnes, B.M.; Punola, D.C. [Howmet Thermatech Coatings, Whitehall, MI (United States)

    1997-10-01

    An experimental program was undertaken to identify diffusion coating impurities introduced by standard aluminizing processes and to evaluate the impact of those impurities on oxidation resistance of the resultant Pt aluminide coating. IN-738 tabs and foils were platinum-electroplated, and then aluminized using three different processes: high-activity pack cementation, high-activity CVD and low-activity CVD. The results suggest that aluminizing processes which involve aluminum bearing alloys in the coating retort with H{sub 2} or H{sub 2}/HCl gas at high temperature can contaminate the diffusion coating during deposition. CVD low-activity aluminizing (coating gas generated at low temperature outside the coating chamber from 99.999% Al) did not introduce any coating impurities. In addition, the data indicates that harmful impurities from the IN-738 substrate (sulfur, boron and tungsten) and the electroplating process (phosphorus) were removed from the coating during deposition. The CVD low-activity Pt aluminide coating was the `cleanest` in the study, and it exhibited the best high-temperature oxidation resistance of the coatings considered. It can be concluded that trace elements in diffusion coatings from the superalloy substrate and/or the aluminizing process can adversely effect the oxidation resistance of those coatings, and that CVD low-activity aluminizing yields cleaner coatings than other commercially available aluminizing techniques. (orig.) 10 refs.

  13. Oil shale commercialization study

    Energy Technology Data Exchange (ETDEWEB)

    Warner, M.M.

    1981-09-01

    Ninety four possible oil shale sections in southern Idaho were located and chemically analyzed. Sixty-two of these shales show good promise of possible oil and probable gas potential. Sixty of the potential oil and gas shales represent the Succor Creek Formation of Miocene age in southwestern Idaho. Two of the shales represent Cretaceous formations in eastern Idaho, which should be further investigated to determine their realistic value and areal extent. Samples of the older Mesozonic and paleozoic sections show promise but have not been chemically analyzed and will need greater attention to determine their potential. Geothermal resources are of high potential in Idaho and are important to oil shale prospects. Geothermal conditions raise the geothermal gradient and act as maturing agents to oil shale. They also might be used in the retorting and refining processes. Oil shales at the surface, which appear to have good oil or gas potential should have much higher potential at depth where the geothermal gradient is high. Samples from deep petroleum exploration wells indicate that the succor Creek shales have undergone considerable maturation with depth of burial and should produce gas and possibly oil. Most of Idaho's shales that have been analyzed have a greater potential for gas than for oil but some oil potential is indicated. The Miocene shales of the Succor Creek Formation should be considered as gas and possibly oil source material for the future when technology has been perfectes. 11 refs.

  14. Chattanooga shale: uranium recovery by in situ processing

    Energy Technology Data Exchange (ETDEWEB)

    Jackson, D.D.

    1977-04-25

    The increasing demand for uranium as reactor fuel requires the addition of sizable new domestic reserves. One of the largest potential sources of low-grade uranium ore is the Chattanooga shale--a formation in Tennessee and neighboring states that has not been mined conventionally because it is expensive and environmentally disadvantageous to do so. An in situ process, on the other hand, might be used to extract uranium from this formation without the attendant problems of conventional mining. We have suggested developing such a process, in which fracturing, retorting, and pressure leaching might be used to extract the uranium. The potential advantages of such a process are that capital investment would be reduced, handling and disposing of the ore would be avoided, and leaching reagents would be self-generated from air and water. If successful, the cost reductions from these factors could make the uranium produced competitive with that from other sources, and substantially increase domestic reserves. A technical program to evaluate the processing problems has been outlined and a conceptual model of the extraction process has been developed. Preliminary cost estimates have been made, although it is recognized that their validity depends on how successfully the various processing steps are carried out. In view of the preliminary nature of this survey (and our growing need for uranium), we have urged a more detailed study on the feasibility of in situ methods for extracting uranium from the Chattanooga shale.

  15. Molecular characterization and comparison of shale oils generated by different pyrolysis methods

    Science.gov (United States)

    Birdwell, Justin E.; Jin, Jang Mi; Kim, Sunghwan

    2012-01-01

    Shale oils generated using different laboratory pyrolysis methods have been studied using standard oil characterization methods as well as Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) with electrospray ionization (ESI) and atmospheric photoionization (APPI) to assess differences in molecular composition. The pyrolysis oils were generated from samples of the Mahogany zone oil shale of the Eocene Green River Formation collected from outcrops in the Piceance Basin, Colorado, using three pyrolysis systems under conditions relevant to surface and in situ retorting approaches. Significant variations were observed in the shale oils, particularly the degree of conjugation of the constituent molecules and the distribution of nitrogen-containing compound classes. Comparison of FT-ICR MS results to other oil characteristics, such as specific gravity; saturate, aromatic, resin, asphaltene (SARA) distribution; and carbon number distribution determined by gas chromatography, indicated correspondence between higher average double bond equivalence (DBE) values and increasing asphaltene content. The results show that, based on the shale oil DBE distributions, highly conjugated species are enriched in samples produced under low pressure, high temperature conditions, and under high pressure, moderate temperature conditions in the presence of water. We also report, for the first time in any petroleum-like substance, the presence of N4 class compounds based on FT-ICR MS data. Using double bond equivalence and carbon number distributions, structures for the N4 class and other nitrogen-containing compounds are proposed.

  16. Moderate dementia: relational social engagement (RSE) during family visits.

    Science.gov (United States)

    Walmsley, Bruce; McCormack, Lynne

    2017-05-17

    This qualitative study seeks evidence of retained social awareness in individuals with moderate dementia residing in care-homes, when engaged in interactive family visits. Speech/non-speech data collected from 10/15-minute video-recorded family interactions of five family groups (12 individuals; 2 sessions per family group) were coded using thematic analysis. Interactional patterns embedded in familiar bonds provided the context for the superordinate theme: relational social engagement (RSE). This overarched two subthemes: in-step and out-of-step; highlighting that RSE, can occur as a result of both positive and negative familial communication patterns. When familial communication was in-step, despite changed communication pathways, the resident's attempts at social engagement appeared open, relaxed, and responsive. A sense of trust, and familiarity appeared to facilitate reciprocal understanding and the striving of resident family members to retain family group membership. When familial communication was out-of-step, active attempts at reciprocity or open engagement from visiting family members were not observed. At such times, communication became discordant, and frustrated in their efforts to remain an integral part of the family group, the resident appeared disinterested or guarded often retorting with annoyance at visiting family members. The construct of RSE appears specific to prior meaningful relationships, where optimal social awareness and communication, positive and negative, can occur. Currently, dementia assessment and care does not include RSE during family interactions. Implications are discussed.

  17. 废名对进化论的反思与质疑%Fei Ming's Reflection and Query on the Theory of Evolution

    Institute of Scientific and Technical Information of China (English)

    陈建军

    2011-01-01

    废名著《阿赖耶识论》,意在破熊十力的《新唯识论》,但他一开始却是以摧毁进化论为目标的。他对进化论的驳斥,是在“质疑生物进化论”、“质疑社会进化论”、“质疑唯科学主义”等三个相关层面展开的。废名以不无偏激的言辞表现了一种较为保守的文化姿态,其思想中明显带有民族主义的情结和反现代性的倾向,但对于我们重新认识和深刻反思唯科学主义特别是进化学说实不乏启示意义。%Fei Ming wrote the book On Alaiye Doctrine in an attempt to challenge Xiong Shili's New Mere-consciousness Theory. In reality, he originally intended to retort the theory of evolution at three levels, including questioning theories of biological evolution

  18. Pyrolysis and co-pyrolysis of coal and oil shale

    Energy Technology Data Exchange (ETDEWEB)

    Qiumin Zhang; Demin He; Jun Guan [Dalian University of Technology, Dalian (China). Institute of Coal Chemical Engineering

    2007-07-01

    Pyrolysis and co-pyrolysis of coal and oil shale was investigated by using Yilan oil shale, Longkou oil shale, Huolinhe lignite, Taiji gas coal and Ruqigou anthracite as raw materia1s. A fixed-bed pyrolysis and co-pyrolysis of these coal and oil shale were investigated. The results indicated that synergetic effect existed with the oil yield increased, water yield decreased, and the synergetic effect varied with the mass percentage of coal differed. The co-pyrolysis oil yield of Yilan oil shale and Ruqigou anthracite is a little higher than the linear sum of their oil yield in the pyrolysis process. But for the co-pyrolysis of Taiji gas coal and Yilan oil shale, no significant change of the oil yield was found. Huolinhe lignite and Longkou oil shale were chosen as the material for the solid heat carrier experiment. Synergetic effect analyses of both the fixed-bed pyrolysis and the retorting process with solid heat carrier were given. Huolinhe lignite is an ideal material for oil recovery by pyrolysis, with high volatile and low ash, its oil content is 8.55%. Longkou oil shale is an ideal material for oil recovery by pyrolysis, with high oil content of 14.38%. The optimum co-pyrolysis temperature for Huolinhe lignite and Longkou oil shale is 510{sup o}C. Synergetic effect was found with the oil increased 9% and water decreased 36%. 5 refs., 2 figs., 10 tabs.

  19. Assessment of In-Place Oil Shale Resources of the Green River Formation, Piceance Basin, Western Colorado

    Science.gov (United States)

    Johnson, Ronald C.; Mercier, Tracey J.; Brownfield, Michael E.; Pantea, Michael P.; Self, Jesse G.

    2009-01-01

    The U.S. Geological Survey (USGS) recently completed a reassessment of in-place oil shale resources, regardless of richness, in the Eocene Green River Formation in the Piceance Basin, western Colorado. A considerable amount of oil-yield data has been collected after previous in-place assessments were published, and these data were incorporated into this new assessment. About twice as many oil-yield data points were used, and several additional oil shale intervals were included that were not assessed previously for lack of data. Oil yields are measured using the Fischer assay method. The Fischer assay method is a standardized laboratory test for determining the oil yield from oil shale that has been almost universally used to determine oil yields for Green River Formation oil shales. Fischer assay does not necessarily measure the maximum amount of oil that an oil shale can produce, and there are retorting methods that yield more than the Fischer assay yield. However, the oil yields achieved by other technologies are typically reported as a percentage of the Fischer assay oil yield, and thus Fischer assay is still considered the standard by which other methods are compared.

  20. The Abject Human Nature:a Critical Analysis of Human Nature Reflected in Lu Xun’s Essays%卑怯人性:鲁迅杂文人学的一个精神批判

    Institute of Scientific and Technical Information of China (English)

    王吉鹏; 陈晨

    2013-01-01

      鲁迅作为我们民族的英魂,一直致力于剔除国人精神中的痼疾,他清醒地认识到中国人的血液里流淌着卑怯人性的“精髓”:惰性与中庸、自私阴险的鬼蜮伎俩与借别人的凶残和牺牲来慰藉自己的怯懦等,急需加以疗治。于是拿起“匕首投枪”直指这黑暗世界中人性的卑怯,冷刺造成这卑怯人性的黑暗社会,以期改变国人的劣根性。%Mr. Lu Xun, as the soul of the Chinese nation, strives to eliminate the chronic problems from the spirit of the Chinese people. He recognizes that the abject human nature is intrinsic to the Chinese people, that is, laziness, belief in the Golden Mean, selfishness and insidiousness as well as taking advantage of others’ cruelty or losses. Therefore, he spares no efforts to criticize the abject human nature as well as the retorted society, which is expected to transform all this.

  1. Characteristics and synergistic effects of co-pyrolysis of yinning coal and poplar sawdust

    Directory of Open Access Journals (Sweden)

    Zhu Shenghua

    2016-01-01

    Full Text Available Co-process of biomass and coal is perceived as a way to enhance the energy utilization by virtue of the integrated and interactive effects between different types of carbonaceous fuels. The purpose of this study was to investigate the co-pyrolysis characteristics of Yining coal and poplar sawdust, and to determine whether there is any synergistic effect in pyrolytic product yields. The coal was blended with sawdust at a mass fraction of 9:1, 7:3, 5:5, 3:7 and 1:9 respectively. The change of char yields, maximum weight loss rate and the corresponding temperature of different coal/sawdust blends during pyrolysis were compared by thermogravimetric analysis (TG. The total tar yields during separate coal, sawdust as well as their blends pyrolysis were acquired from the low temperature aluminum retort distillation test. By compare the experimental and theoretical value of the char yields from TG and tar yields from carbonization test, it was observed that co-pyrolysis of coal/sawdust blends produced less char and tar than the total amount produced by separate coal and sawdust pyrolysis. The different product distribution suggested that there was synergy effect in gas product yields. The co-pyrolysis of demineralized and devolatilized sawdust with coal indicated that the ash in the sawdust was the main contributor to the synergistic effect.

  2. The effect of moisture on the release and enrichment of heavy metals during pyrolysis of municipal solid waste.

    Science.gov (United States)

    Raclavská, Helena; Corsaro, Agnieszka; Hlavsová, Adéla; Juchelková, Dagmar; Zajonc, Ondřej

    2015-03-01

    The investigation of the effect of moisture on the release and enrichment of heavy metals during pyrolysis of municipal solid waste is essential. This is important owing to: (i) the increasing amount of metals in the solid product of pyrolysis beyond the normalised level; (ii) the effect of moisture on the overall cost of pyrolysis process; and (iii) the utilisation of pyrolysis products. Seven metals were selected for evaluation: arsenic, cadmium, chromium, mercury, nickel, lead, and vanadium. Pyrolysis experiments were conducted in a steel retort at 650 °C. The municipal solid waste samples with moisture contents of 0, 30, and 65 wt% were investigated. The relative enrichment index and release of heavy metals were evaluated individually for liquid and solid fractions. A consistent trend was observed for the majority of metals investigated. Reductions of relative enrichment index and release, i.e. an increase of volatility, were observed for arsenic, chromium, cadmium, nickel, and vanadium, with an increase of municipal solid waste moisture. Whereas divergent results were obtained for lead and mercury. The effect of moisture on the relative enrichment index and release was greater at 65 wt% moisture than at 30 wt% for lead, and more remarkable at 30 wt% than at 65 wt% for mercury.

  3. In vitro studies evaluating leaching of mercury from mine waste calcine using simulated human body fluids

    Science.gov (United States)

    Gray, John E.; Plumlee, Geoffrey S.; Morman, Suzette A.; Higueras, Pablo L.; Crock, James G.; Lowers, Heather A.; Witten, Mark L.

    2010-01-01

    In vitro bioaccessibility (IVBA) studies were carried out on samples of mercury (Hg) mine-waste calcine (roasted Hg ore) by leaching with simulated human body fluids. The objective was to estimate potential human exposure to Hg due to inhalation of airborne calcine particulates and hand-to-mouth ingestion of Hg-bearing calcines. Mine waste calcines collected from Hg mines at Almadén, Spain, and Terlingua, Texas, contain Hg sulfide, elemental Hg, and soluble Hg compounds, which constitute primary ore or compounds formed during Hg retorting. Elevated leachate Hg concentrations were found during calcine leaching using a simulated gastric fluid (as much as 6200 μg of Hg leached/g sample). Elevated Hg concentrations were also found in calcine leachates using a simulated lung fluid (as much as 9200 μg of Hg leached/g), serum-based fluid (as much as 1600 μg of Hg leached/g), and water of pH 5 (as much as 880 μg of Hg leached/g). The leaching capacity of Hg is controlled by calcine mineralogy; thus, calcines containing soluble Hg compounds contain higher leachate Hg concentrations. Results indicate that ingestion or inhalation of Hg mine-waste calcine may lead to increased Hg concentrations in the human body, especially through the ingestion pathway.

  4. Ion chromatographic analysis of oil shale leachates

    Energy Technology Data Exchange (ETDEWEB)

    Butler, N.L.

    1990-10-01

    In the present work an investigation of the use of ion chromatography to determine environmentally significant anions present in oil shale leachates was undertaken. Nadkarni et al. have used ion chromatography to separate and quantify halogen, sulfur and nitrogen species in oil shales after combustion in a Parr bomb. Potts and Potas used ion chromatography to monitor inorganic ions in cooling tower wastewater from coal gasification. Wallace and coworkers have used ion chromatography to determine anions encountered in retort wastewaters. The ions of interest in this work were the ions of sulfur oxides including sulfite (SO{sub 3}{sup 2{minus}}), sulfate (SO{sub 4}{sup 2{minus}}), thiosulfate (S{sub 2}O{sub 3}{sup 2{minus}}), dithionite (S{sub 2}O{sub 4}{sup 2{minus}}), dithionate (S{sub 2}O{sub 6}{sup 2{minus}}), peroxyodisulfate (S{sub 2}O{sub 8}{sup 2{minus}}), and tetrathionate (S{sub 4}O{sub 6}{sup 2{minus}}), and thiocyanate (SCN{sup {minus}}), sulfide (S{sup 2{minus}}) hydrosulfide (HS{sup {minus}}), cyanide (CN{sup {minus}}), thiocyanate (SCN{sup {minus}}), and cyanate (OCN{sup {minus}}). A literature search was completed and a leaching procedure developed. 15 refs., 6 figs., 1 tab.

  5. Transport and fate of mercury under different hydrologic regimes in polluted stream in mining area.

    Science.gov (United States)

    Lin, Yan; Larssen, Thorjørn; Vogt, Rolf D; Feng, Xinbin; Zhang, Hua

    2011-01-01

    Seepage from Hg mine wastes and calcines contains high concentrations of mercury (Hg). Hg pollution is a major environmental problem in areas with abandoned mercury mines and retorting units. This study evaluates factors, especially the hydrological and sedimentary variables, governing temporal and spatial variation in levels and state of mercury in streams impacted by Hg contaminated runoff. Samples were taken during different flow regimes in the Wanshan Hg mining area in Guizhou Province, China. In its headwaters the sampled streams/rivers pass by several mine wastes and calcines with high concentration of Hg. Seepage causes serious Hg contamination to the downstream area. Concentrations of Hg in water samples showed significant seasonal variations. Periods of higher flow showed high concentrations of total Hg (THg) in water due to more particles being re-suspended and transported. The concentrations of major anions (e.g., Cl-, F-, NO3- and SO4(2-)) were lower during higher flow due to dilution. Due to both sedimentation of particles and dilution from tributaries the concentration of THg decreased from 2100 ng/L to background levels (MINTEQ) showed that Hg(OH)2 associated with dissolved organic matter is the main form of Hg in dissolved phase in surface waters in Wanshan (over 95%).

  6. Furan in commercially processed foods: four-year field monitoring and risk assessment study in Korea.

    Science.gov (United States)

    Kim, Tae-Kyu; Lee, Yun-Kyung; Kim, Simhae; Park, Young Sig; Lee, Kwang-Geun

    2009-01-01

    The aim of this study was to monitor and assess the risk associated with the presence of furan in various food products consumed in Korea. An optimized analytical method was used for the analysis of furan levels. The optimized solid-phase microextraction (SPME) fiber exposure conditions as follows for temperature, time, and amount of sample were 50 degrees C, 20 min, and 5 g (ml), respectively. Furan was detected in all food samples tested, at levels ranging from 0.4 ng/g in canned crab to 814 ng/g in ground roasted coffee powder. The furan levels in coffee, canned fish, canned meats, sauce, soup, retort, canned vegetables, baby foods, nutritional/diet drinks, confectionary and biscuits and snacks, juice, jams, and canned fruit were (ng/g) 169, 56.1, 30.1, 21.1, 18.1, 15.6, 10.9, 10.6, 7.1, 5.4, 3.7, 3.2, and 2.9, respectively. Furan concentrations in baby food products were between 1 and 102.5 ng/g. The total exposure estimate of furan was determined to be 10.6 ng/kg/d (maximum, 20 ng/kg/d) for adults, and 17.4 ng/kg/d (maximum. 84.9 ng/kg/d) for babies. Exposure estimates found in this study are lower than those prescribed by the U.S. Food and Drug Administration (FDA).

  7. Study on the Analytical Behaviour of Concrete Structure Against Local Impact of Hard Missile

    Directory of Open Access Journals (Sweden)

    Ahmad Mujahid Ahmad Zaidi

    2011-07-01

    Full Text Available Concrete is basic construction material used for almost all kind of structure. However, in the majority essential structures such as nuclear plants, Power plants, Weapon Industries, weapons storage places, water retaining structures like dams, highways barriers, bridges, & etc., concrete structures have to be designed as self-protective structure which can afford any disaster or consciously engendered unpleasant incidents such as incident occurs in nuclear plants, incident in any essential industry, terrorist attack, Natural disasters like tsunami and etc missile attack, and local impact damage generated by kinetic missiles dynamic loading (steel rods, steel pipes, turbine blades, etc.. This paper inquisitively is paying attention on verdict of the recent development in formulating analytical behavior of concrete and reinforced concrete structures against local impact effect generated by hard missile with and without the influence of dimensional analysis based on dominant non-dimensional parameters, various nose shape factors at normal and certain inclined oblique angles. The paper comprises the analytical models and methods for predicting penetration, and perforation of concrete and reinforced concrete. The fallout conquer from this study can be used for making design counsel and design procedures for seminal the dynamic retort of the concrete targets to foil local impact damage.

  8. MICROBIALLY MEDIATED LEACHING OF RARE EARTH ELEMENTS FROM RECYCLABLE MATERIALS

    Energy Technology Data Exchange (ETDEWEB)

    Reed, D. W.; Fujita, Y.; Daubaras, D. L.; Bruhn, D. F.; Reiss, J. H.; Thompson, V. S.; Jiao, Y.

    2016-09-01

    Bioleaching offers a potential approach for recovery of rare earth elements (REE) from recyclable materials, such as fluorescent lamp phosphors or degraded industrial catalysts. Microorganisms were enriched from REE-containing ores and recyclable materials with the goal of identifying strains capable of extracting REE from solid materials. Over 100 heterotrophic microorganisms were isolated and screened for their ability to produce organic acids capable of leaching REE. The ten most promising isolates were most closely related to Pseudomonas, Acinetobacter and Talaromyces. Of the acids produced, gluconic acid appeared to be the most effective at leaching REE (yttrium, lanthanum, cerium, europium, and terbium) from retorted phosphor powders (RPP), fluidized cracking catalyst (FCC), and europium-doped yttrium oxide (YOEu). We found that an Acinetobacter isolates, BH1, was the most capable strain and able to leach 33% of the total REE content from the FCC material. These results support the continuing evaluation of gluconic acid-producing microbes for large-scale REE recovery from recyclable materials.

  9. Quality changes of ready-to-eat ginseng chicken porridge during storage at 25 °C.

    Science.gov (United States)

    Jang, Dong Hyun; Lee, Keun Taik

    2012-12-01

    Ready-to-eat (RTE) ginseng chicken porridge was heated in a retort with an F-value of 4.0 after being packaged in a gas-tight plastic tray (PP/EVOH/PP) with top film (PET/PA/CPP). Various quality changes were investigated during the storage for 28 weeks at 25 °C. Over the storage period, microorganisms were not detected above 1.0 log cfu/cm² (detection limit). The viscosity increased sharply from 775 to 2025 cp for initial 4 weeks and increased steadily until 16 weeks, with a slight reduction thereafter. During the 28 weeks of storage, the ratio of residual oxygen and pH decreased from 10.8% and 6.49 to 5.7% and 6.05, while retrogradation degree increased from 0% to 55.9%. Hunter L*, b*, and ΔE values increased until 20 weeks and remained for the rest of storage. Based on sensory, microbiological and physicochemical evaluations, the RTE ginseng chicken porridge could be marketable for at least 24 weeks at 25 °C.

  10. Slovak brown coals as a feedstock for the active coke production

    Directory of Open Access Journals (Sweden)

    Sobolewski Aleksander

    1998-09-01

    Full Text Available V èlánku sa venuje pozornos možnostiam výroby aktívneho koksu zo slovenského hnedého uhlia Bane Cíge¾. Príprava aktívneho koksu bola uskutoènená v laboratórnych podmienkach a v poloprevádzke. Surové uhlie sa podrobilo vysokoteplotnej pyrolýze v retorte s pevným roštom, v klasickej rotaènej peci, ako aj vo fluidnom reaktore. Následne boli urèované adsorpèné charakteristiky získaného aktívneho koksu, ktoré sa porovnávali s charakteristikami komerène vyrábaného koksu. V príspevku sa taktiež diskutujú možnosti aplikácie pripraveného aktívneho koksu v technológiách ochrany životného prostredia.

  11. Processing needs and methodology for wastewaters from the conversion of coal, oil shale, and biomass to synfuels

    Energy Technology Data Exchange (ETDEWEB)

    1980-05-01

    The workshop identifies needs to be met by processing technology for wastewaters, and evaluates the suitability, approximate costs, and problems associated with current technology. Participation was confined to DOE Environmental Control Technology contractors to pull together and integrate past wastewater-related activities, to assess the status of synfuel wastewater treatability and process options, and to abet technology transfer. Particular attention was paid to probable or possible environmental restrictions which cannot be economically met by present technology. Primary emphasis was focussed upon process-condensate waters from coal-conversion and shale-retorting processes. Due to limited data base and time, the workshop did not deal with transients, upsets, trade-offs and system optimization, or with solids disposal. The report is divided into sections that, respectively, survey the water usage and effluent situation (II); identify the probable and possible water-treatment goals anticipated at the time when large-scale plants will be constructed (III); assess the capabilities, costs and shortcomings of present technology (IV); explore particularly severe environmental-control problems (V); give overall conclusions from the Workshop and recommendations for future research and study (VI); and, finally, present Status Reports of current work from participants in the Workshop (VII).

  12. Dose calcium channel blocker verapamil decrease urinary VMA levels in sympathoadrenal hyperactive patients with posttraumatic stress disorder?

    Institute of Scientific and Technical Information of China (English)

    Munawar Alam Ansari; Shahida PAhmed; Zahida Memon

    2008-01-01

    Objective:The majority of the patients with posttraumatic stress disorders (PTSD)embrace augmented urina-ry flow of Vanillylmandelic Acid (VMA)than normal subjects owing to superior sympathetic doings,which steer to cardiovascular catastrophe.Urinary flow of VMA was evaluated as sympathoadrenal bustle marker in patients with posttraumatic stress disorder.Calcium ion shows a noteworthy dependability in nervousness owing to its special effects on brain synaptosomes.So this study was conducted to explore the effects of Verapamil on sympathoadrenal motion in patients with PTSD.Methods:Placebo controlled clinical tryout was conducted. At first hundred (100)PTSD patients were chosen and enrolled in the study,from department of Psychological Medicine Dow University of Health Sciences,Karachi.Verapamil 120 mg/day was specified in divided doses to group-I (n =50)patients and group-II (n =50)patients received placebo therapy on a daily basis for nine weeks.Each and every patient was monitored weekly,all the way through extent of study.Results:Under-neath the posttraumatic stress disorder,urinary excretion of VMA was greater.Calcium channel blocker vera-pamil additionally abolished the embellished retort in urinary flow of VMA appreciably in patients with PTSD. Conclusion:Verapamil was experiential to be exceedingly effectual treatment.It reduces VMA levels in u-rine,and on the whole cardiovascular threat in PTSD patients.

  13. Determination of mechanism of flock sediment formation in tea beverages.

    Science.gov (United States)

    Niino, Hitoshi; Sakane, Iwao; Okanoya, Kazunori; Kuribayashi, Syuhei; Kinugasa, Hitoshi

    2005-05-18

    The mechanism of sediment formation during the storage of green tea beverage was investigated. Green tea extract was separated by Diaion HP-20 column chromatography, and a sediment-formation test was performed. Results showed that at least one compound of the substance causing flock sediment was contained in each of the HP-20 nonadsorbed and adsorbed fractions. From the following fractionations and structure analyses, the substance in the HP-20 adsorbed fraction was determined to be 1-O-galloyl-4,6-O-(S)-hexahydroxydiphenoyl-beta-D-glucose (strictinin), which is one of the ellagitannins. Strictinin was hydrolyzed to ellagic acid by heat-sterilization processes such as retort sterilization or the ultra-high temperature processing used during the manufacturing of tea beverages. Ellagic acid combined with proteins in the HP-20 nonadsorbed fraction to form an irreversible sediment of green tea beverage; ellagic acid and proteins were confirmed to be present in that sediment. The HP-20 adsorbed fraction contained little strictinin and formed hardly any sediment, suggesting that control of the strictinin content is significant in avoiding sediment formation during the manufacturing process of tea beverages.

  14. Future Recovery of Energy and Mineral Values from Organic-Rich Shales (Summary L'avenir de la production d'énergie et de la valeur minérale des schistes riches en matière organique (résumé

    Directory of Open Access Journals (Sweden)

    Park W. C.

    2006-10-01

    Full Text Available Oil shale deposits vary significantly in their geological nature and can represent enormous reserves of low grades ores for various minerals such as alumina, sodium carbonates, molybdenum, nickel, vanadium, and uranium. The treatment of these rocks for mineral values can be economically attractive when coupled with the production of synthetic oil. Mutually shared costs for extractinq the mineral values can be favorably affected by utilizing by-products from the oil shale retorting. These can include the residual char for a carbonaceous reductant or fuel, C02 for acidification, or lime and soda ash for caustic. Conversely, an inappropriate choice of oil shale retorting conditions can substantially lower subsequent recovery of mineral values from the spent shale. The proceeding considerations will be discussed for several oil shale deposits including: 1. The Green River formation in the mid-western United States which is not only oil rich but also represents a nearly inexhaustible domestic supply of alumina and sodium carbonates and 2. The block shale of Julia Creek, Queensland, Australia, the Devonian Chattanooga shale in the United States, the Cambrian Kulm shale in Sweden, the Permian Lodeve shale in southern France, and the Paleozoic shales from Korea and USSR for energy and metal values such as molybdenum, nickel, vanadium, and uranium. La nature géologique des dépôts de schistes à huile est très variée ; ces schistes peuvent représenter des réserves énormes de minerais à faible teneur de métaux tels que l'aluminium, le molybdène, le nickel, le vanadium, l'uranium, sans oublier le carbonate de sodium. Le traitement de ces roches pour leur valeur minérale peut être attractif économiquement s'il est associé à la production d'huile synthétique. La répartition des coûts d'extraction des métaux peut être favorablement affectée en utilisant les sous-produits du traitement des schistes à huile. Ceci peut comprendre le goudron

  15. 内加热移动床生物质炭化中试设备监控系统开发%Monitoring and control system development for pilot-scale moving bed biomass carbonization equipment with internal heating

    Institute of Scientific and Technical Information of China (English)

    丛宏斌; 赵立欣; 孟海波; 姚宗路

    2015-01-01

    Biochar is a pyrolysis solid product of biological organic material (biomass) in anoxic and anaerobic conditions, It can be widely used in carbon emission reduction, water purification, adsorption of heavy metals and soil improvement, etc., so it can partly provide solutions for the focus issues of global concern, such as climate warming, environmental pollution and soil degradation. The production and application of biochar have aroused wide attention of researchers both at home and abroad. According to the continuity of production process, two types of biomass carbonization techniques have been developed in China, which are respectively fixed bed carbonization technique and moving bed carbonization technique. The fixed bed carbonization techniques can be divided into kiln carbonization technique and retort carbonization. Accordingly, the kiln carbonization technique commonly adopts spontaneous combustion heating method, its corresponding equipments have the features of simple structure and low-cost, so this technique has been used widely in China. The retort carbonization technique adopts external heating method, so its corresponding device has more complicated structure than the kiln carbonization technique, this technique can commonly realize the poly-generation of biochar and other byproducts. The moving bed carbonization technique is upgraded from the fixed bed carbonization technique, and according to flowing the direction of material, this technique can be divided into transverse flow moving bed carbonization technique and vertical flow moving bed carbonization technique. Continuous producing is the remarkable feature of the moving bed biomass carbonization technique, and it has higher automation level and lower labor intensity, compared with the fixed bed carbonization technique. The moving bed carbonization technique represents developing direction of China’s biomass carbonization technique. Aimed at the problems of low productivity, high energy

  16. Histology without xylene.

    Science.gov (United States)

    Buesa, René J; Peshkov, Maxim V

    2009-08-01

    After the hazardous effects of xylene became indisputable in the 1970s, many potential substitutes became available, some with as many if not more hazards. This article discusses the inadequacy of 5 vegetable oils as substitutes, as well as the characteristics of 22 D-limonene-based substitutes, all less effective in their chemical role, some capable of inducing health problems, and costing more than twice as much as xylene. Some of the 35 alkane-based substitutes discussed are effective for tissue processing, less toxic, with a cost about the same as xylene, but are not very effective for dewaxing and other staining tasks. Isopropanol (2-propanol) alone or mixed with molten paraffin is a technically acceptable and cost-effective substitute for xylene for tissue processing, but in this study, we demonstrate that the best clearing agents from the sectioning quality and diagnostic value point of view, with automated or manual protocols, are mixtures of 5:1 and 2:1 isopropanol and mineral oil, followed by undiluted mineral oil, all at 50 degrees C, making them a safer and cheaper substitute than xylene. Using a 1.7% dishwasher soap aqueous solution at 90 degrees C to dewax before staining and oven drying the stained sections before coverslipping will eliminate xylene from the staining tasks. Tissue processors retorts and conduits can be dewaxed with a 2% solution of a strong glassware laboratory detergent. These 4 methodologies will make the histology laboratory xylene-free but, due to the natural resistance to change, many histotechs will be reluctant to adopt them if they think that their technical expertise could be jeopardized, and the only way these changes will succeed is if the pathologists, as stewards of the histology laboratory, commit to their implementation.

  17. Improvement of flavor and viscosity in hot and cold break tomato juice and sauce by peel removal.

    Science.gov (United States)

    Mirondo, Rita; Barringer, Sheryl

    2015-01-01

    Tomatoes are typically not peeled before being made into juice but the peels contain enzymes that affect the odor, flavor, and viscosity of the juice. The peels are removed in the finisher, but their presence during the break process may affect quality. Juice was processed from peeled and unpeeled tomatoes using hot or cold break. The juices were pasteurized by high temperature short time (HTST), low temperature long time (LTLT), or with a retort. The control samples were treated with 10% calcium chloride to stop enzymatic activity in the juice. Sauce was made from juice and the tomato products were analyzed for volatiles, color, viscosity, and by sensory. Cold break juice made with peel contained higher levels of some lipoxygenase-, carotenoid-, and amino acid-derived volatiles, than the juice made without peel. Because of the lack of enzyme activity, hot break juices had lower levels of these volatiles and there was no significant difference between hot break juices made with and without peel. CaCl2 -treated and HTST juice had higher levels of most of the volatiles than LTLT, including the lipoxygenase-derived volatiles. The presence of peel produced a significant decrease in the viscosity of the cold break juice and sauce. There was no significant difference in the hue angle, total soluble solids, pH, titratable acidity, and vitamin C for most of the treatments. The texture, flavor, and overall liking of cold break juice made without peel were preferred over cold break juice made with peel whereas the color was less preferred. Between the sauces no significant differences in preference were obtained.

  18. Development of slow pyrolysis business operations in Finland - Hidaspyro

    Energy Technology Data Exchange (ETDEWEB)

    Fagernaes, L.; Kuoppala, E.; Arpiainen, V.; Oasmaa, A. (VTT Technical Research Centre of Finland, Espoo (Finland)), e-mail: leena.fagernas@vtt.fi; Setaelae, H.; Hagner, M. (University of Helsinki, Lahti (Finland), Dept. of Ecological and Environmental Sciences), e-mail: heikki.setala@helsinki.fi; Tiilikkala, K.; Lindqvist, I.; Lindqist, B. (MTT Agrifood Research Finland, Jokioinen (Finland)), e-mail: kari.tiilikkala@mtt.fi

    2011-11-15

    The primary aim of the Hidaspyro project was to support and develop slow pyrolysis business operations of small and medium-sized enterprises by overcoming barriers to commercialisation. In addition to charcoal, the products include distillates, tar and gases. Birch distillate is a new innovation in biological plant protection. Slow pyrolysis test runs with different retorts were carried out using hardwood as feedstock. The analytical scheme was developed for the liquid products. The organic content was for distillates 15-30 wt %, and for tars about 80 wt %. The detailed chemical composition of distillates was determined. Methods to separate tar from distillates were developed resulting in tar free and PAH free distillates, which due to their chemical composition are promising to be utilized. Economic calculations based on the test runs were carried out. Based on experimental results and economic assessments, optimal product lines and business concepts were determined. For more profitable business, utilisation of all the products is needed. Potential applications of the liquids as repellents and wood preservatives were studied. Land snail proved to be a very useful organism for testing different samples. All the liquids tested repelled land snails effectively. Active ingredients of the liquids were identified based on the observed impacts on snails and field voles. The efficacy of repellents is based on several different substances. Storing of the liquids over one year did not reduce the repelling efficacy. The stability of distillates in soils, and the potential leaching of distillates out of the soil were studied in a greenhouse experiment. Tasks related to REACH registration of the products, such as pre-registration, SIEF Communication, preparation of IUCLID5 files, notification of CLP, and up-dating of chemical safety reports, were processed for the enterprises and focused on the terms 'charcoal' and 'pyroligneous acids'. (orig.)

  19. Development of slow pyrolysis business operations in Finland - Hidaspyro

    Energy Technology Data Exchange (ETDEWEB)

    Fagernaes, L.; Kuoppala, E.; Arpiainen, V.; Oasmaa, A. (VTT Technical Research Centre of Finland, Espoo (Finland)), Email: leena.fagernas@vtt.fi; Setaelae, H.; Hagner, M. (Helsinki Univ., Lahti (Finland)Dept. of Ecological and Environmental Sciences), Email: heikki.setala@helsinki.fi; Tiilikkala, K.; Lindqvist, I.; Lindqvist, B. (MTT Agrefood Research Finland, Jokioinen (Finland)), Email: kari.tiilikkala@mtt.fi

    2010-10-15

    The primary aim of the Hidaspyro project is to support and develop slow pyrolysis business operations of small and medium-sized enterprises. In addition to charcoal, the products include distillates, tar and gases. Birch distillate is a new innovation in biological plant protection. Slow pyrolysis test runs with different retorts have been carried out. The analytical scheme developed for the liquid products proved to be very workable. The distillates could be analysed extensively. The organic content was for distillates 15-30 wt%, and for tars about 80 wt%. Methods to separate tar from distillates were developed resulting in tar free and PAH free distillates, which due to their chemical composition are promising to be utilized. Economic calculations based on the test runs are un der way. Based on experimental results and economic assessments, optimal product lines and business concepts will be determined. Potential uses and applications of the liquids as repellents and wood preservatives have been studied. All the liquids tested repelled land snails used as test organisms effectively. Active ingredients of the liquids are being identified based on the observed impacts on snails and field voles. Preliminary results indicated that efficacy of repellents is based on different active ingredients. Storing of the liquids over one year did not reduce the repelling efficacy. The stability of distillates in soils, and the potential leaching of distillates out of the soil are studied in a greenhouse experiment. The REACH pre-registration process was carried out for the enterprises and the work has continued with the SIEF tasks. (orig.)

  20. A Transversely Isotropic Thermo-mechanical Framework for Oil Shale

    Science.gov (United States)

    Semnani, S. J.; White, J. A.; Borja, R. I.

    2014-12-01

    The present study provides a thermo-mechanical framework for modeling the temperature dependent behavior of oil shale. As a result of heating, oil shale undergoes phase transformations, during which organic matter is converted to petroleum products, e.g. light oil, heavy oil, bitumen, and coke. The change in the constituents and microstructure of shale at high temperatures dramatically alters its mechanical behavior e.g. plastic deformations and strength, as demonstrated by triaxial tests conducted at multiple temperatures [1,2]. Accordingly, the present model formulates the effects of changes in the chemical constituents due to thermal loading. It is well known that due to the layered structure of shale its mechanical properties in the direction parallel to the bedding planes is significantly different from its properties in the perpendicular direction. Although isotropic models simplify the modeling process, they fail to accurately describe the mechanical behavior of these rocks. Therefore, many researchers have studied the anisotropic behavior of rocks, including shale [3]. The current study presents a framework to incorporate the effects of transverse isotropy within a thermo-mechanical formulation. The proposed constitutive model can be readily applied to existing finite element codes to predict the behavior of oil shale in applications such as in-situ retorting process and stability assessment in petroleum reservoirs. [1] Masri, M. et al."Experimental Study of the Thermomechanical Behavior of the Petroleum Reservoir." SPE Eastern Regional/AAPG Eastern Section Joint Meeting. Society of Petroleum Engineers, 2008. [2] Xu, B. et al. "Thermal impact on shale deformation/failure behaviors---laboratory studies." 45th US Rock Mechanics/Geomechanics Symposium. American Rock Mechanics Association, 2011. [3] Crook, AJL et al. "Development of an orthotropic 3D elastoplastic material model for shale." SPE/ISRM Rock Mechanics Conference. Society of Petroleum Engineers

  1. Health and environmental effects document for direct coal liquefaction - 1981.

    Energy Technology Data Exchange (ETDEWEB)

    Mellinger, P.J.; Wilson, B.W.; Mahlum, D.D.; Sever, L.E.; Olsen, A.R.

    1982-09-01

    This document presents initial estimates of potential human health effects from inhalation of nonmethane hydrocarbons (NMHC) that may be released from a future hypothetical industry producing about 600,000 bb1/day of synthetic fuel by direct liquefaction of coal. The assessment approach starts wth general assumptions that are then refined in a tiered sequence that considers available epidemiological, environmental and chemical data. The uncertainties involved in such an evaluation have been quantified where possible at this early stage of health risk analysis. Many surrogate data bases were considered for application to coal liquefaction including coke oven, British gas retort, roofing tar and asphalts, and cigarette smoke. The coke oven data base was selected for this assessment because the chemical and physical nature of coke oven emissions are judged to more closely approximate potential coal liquefaction emissions. Utilizing the extensive epidemiological data base for coke oven workers as a surrogate model, health effects from release of coal liquefaction NMHC may be quantified. This method results in estimates of about 1 x 10/sup -3/ excess cancer deaths/yr to an industrial work force of 7800 persons and 5 x 10/sup -2/ excess cancer deaths/yr in the U.S. population as a whole from NMHC that boil above 600/sup 0/F. Sources of uncertainty in the estimates are listed. Using these uncertainties, it is estimated that from 2 x 10/sup -4/ to 5 x 10/sup -3/ lung cancer deaths/yr may occur in the industrial work force and from 1 x 10/sup -2/ to 2.5 x 10/sup -1/ lung cancer deaths/yr in the U.S. population as a whole. On an individual basis, the excess lifetime risk to occupationally exposed workers is estimated to be 500 times greater than to members of the U.S. public.

  2. Quality degradation kinetics of vacuum-packaged boiled bamboo shoots under the influence of illumination%光照影响下真空包装水煮笋的品质化动力学

    Institute of Scientific and Technical Information of China (English)

    潘梦垚; 卢立新; 唐亚丽; 卢苏越

    2013-01-01

    透明蒸煮袋真空包装水煮笋在储运和销售过程中不可避免地受到光照影响.研究了不同光照强度下真空包装水煮笋各品质指标的变化规律和反应机理,并建立了相应的反应动力学模型,得到反应速率常数,为选择具有合适透光率的水煮笋软包装材料提供理论依据.结果表明,光照对水煮笋色泽、可溶性蛋白质含量和维生素C含量的变化速率影响显著,确定水煮笋色泽的褪变符合零级反应动力学模型,蛋白质和维生素C的损失均符合一级反应动力学模型.%Boiled bamboo shoots packaged by transparent retort pouch can not avoid illumination during storage,transportation and sale process.Quality indexes reaction rules and mechanism of vacuum-packaged boiled bamboo shoots under different intensity of light were studied.The corresponding kinetic models were established and the reaction rate constants were achieved.The research could provide a theoretical basis for the selection of flexible packaging materials with suitable light transmittance.Results showed that illumination had an obvious effect on the changing rates of color,soluble protein content and vitamin C content.The color fading process of boiled bamboo shoots followed zero-order kinetics model.The protein and vitamin C loss were accorded with first-order kinetics model.

  3. NASA, We Have a Challenge and It's Food Packaging

    Science.gov (United States)

    Perchonok, Michele

    2014-01-01

    Current Packaging: Freeze Dried Foods Packaging ? The thermoformed base is fabricated from Combitherm PAXX230 [a coextrusion of nylon/medium-density polyethylene (MDPE)/nylon/ethylene-vinyl alcohol (EVOH)/nylon/MDPE/linear low-density polyethylene (LLDPE)]. ? The lid is fabricated from Combitherm PAXX115 (a coextrusion of nylon/EVOH/nylon/LF adhesive/HV polyethylene/LLDPE) ? Natural form (Bite size) foods ? The bite-size food package is fabricated from Combitherm PAXX115, a coextrusion of nylon/EVOH/nylon/LF adhesive/HV polyethylene/LLDPE. ? Overwrap ? Packages are wrapped in a white pouch,.003-mm thick, fabricated from a laminate of polyester/polyethylene/aluminum foil/Surlyn®. This overwrap is removed before the food is prepared and heated. Requirements ? High barrier packaging - low oxygen and water vapor transmission rates ? No aluminum layer ? Mass - Flexible ? Puncture resistant ? Approved for food use ? Amenable to sterilization ? Able to be heat sealed ? Preferred (not required) ? Transparent ? Retortable, microwavable, high pressure use. Small Business Innovative Research Program - 7 years ? 8 Phase I contracts ? 4 Phase II contracts ? Two workshops to bring together food packaging experts ? Three internal research tasks ? Public Outreach - average of 3 presentations/yr. for 8 years describing NASA's challenges ? Department of Defense Collaboration - Combat Feeding Program No significant improvement in food packaging capabilities after these efforts. It was unlikely that a food packaging solution could be found within the food science community ? There was a need to go outside to other industries such as pharmaceutical or electrical ? Although a positive result was preferred, a negative result would also be useful ? Two Innovation Techniques were used as a comparison ? InnoCentive - Theoretical Challenge to identify new technologies ? Yet2.com - A matchmaker between NASA and commercial packaging manufacturers

  4. Wei Man is a Chinese, not a Korean%论卫满是中国人而非朝鲜人

    Institute of Scientific and Technical Information of China (English)

    吴彦勤

    2001-01-01

    In BC194, WeiMan,a rebel in Yan region ,escaped to Korea and came to the throne in the locality. Jin Zhenpei,a scholor of RK, considers the majority of people in Yan region belong to the Mo nation, Which is one of ancient nations evolving to Korean;then Jin concludes WeiMan belongs to "Korean system". This thesis retorts his opinion. Indeed, the Mo nation is one of nations hich had evolved to Korean,but the great majority of them in China had fused into Various nations of north China and become the ingredient of the Chinese natioin.It's erroneous to identify the Mo nation with "Korean system".No matter whether WeiMan and Yan's refugees belong to the Mo nation or not,they are Chinese. It can' t be denied that WeiMan Korea contained Chinese constituent.%本文就韩国学者金贞培在其《韩国民族的文化和起源》一书中关于因燕国境内多为貊族,从而认定卫满及燕满亡民为"朝鲜人系统"的观点展开论述。本文认为民族是一个历史的范畴,许多古代民族不断分化融合到其他民族中去,并成为这其他民族不可分割的一部份,因而将貊族完全认为"朝鲜人系统"是错误的。无论卫满和燕满是不是貊族,他们都是中国人;卫满朝鲜的成份是不容否认的。

  5. Conflicts of Discourse Power Displayed in M. Butterfly%《蝴蝶君》的话语权之争

    Institute of Scientific and Technical Information of China (English)

    陈尚坤

    2011-01-01

    黄哲伦的《蝴蝶君》以人物聚散的离奇情节与细腻的心理刻画有力地颠覆了东方对西方依存关系的虚假命题。作者在其作品中试图解构东方主义、反击文化殖民并颠覆西方殖民话语权。由于作者的文化身份、成长经历以及他身处的社会历史环境的局限性,作品对东方主义的解构是有限的,特别是剧中人宋利伶的角色本身就是一个矛盾体:一方面他被看作是颠覆殖民话语的一次努力尝试,另一方面角色本身却强化了西方对东方的固有成见。%David Hwang's M. Butterfly subverts the pseudo-hypothesis of the Oriental reliance on the Occident with its exceptional arrangement of plots and delicate depiction of dramatis personae. Hwang tries to deconstruct Orientalism, retort culture colonialism and topple down the discourse power of western colonialism. Due to Hwang's cultural identity, personal life as well as the social settings he experienced every day, M. Butterfly only partly subverts Orientalism. Particularly, the dra matis persona, Song, is a paradoxical creation: While he is often considered to be the author's effort to subvert the colonial discourse power, he has actually strengthened the West's stereotyped bias against the East.

  6. Technology assessment: environmental, health, and safety impacts associated with oil recovery from US tar-sand deposits

    Energy Technology Data Exchange (ETDEWEB)

    Daniels, J.I.; Anspaugh, L.R.; Ricker, Y.E.

    1981-10-13

    The tar-sand resources of the US have the potential to yield as much as 36 billion barrels (bbls) of oil. The tar-sand petroleum-extraction technologies now being considered for commercialization in the United States include both surface (above ground) systems and in situ (underground) procedures. The surface systems currently receiving the most attention include: (1) thermal decomposition processes (retorting); (2) suspension methods (solvent extraction); and (3) washing techniques (water separation). Underground bitumen extraction techniques now being field tested are: (1) in situ combustion; and (2) in situ steam-injection procedures. At this time, any commercial tar-sand facility in the US will have to comply with at least 7 major federal regulations in addition to state regulations; building, electrical, and fire codes; and petroleum-industry construction standards. Pollution-control methods needed by tar-sand technologies to comply with regulatory standards and to protect air, land, and water quality will probably be similar to those already proposed for commercial oil-shale systems. The costs of these systems could range from about $1.20 to $2.45 per barrel of oil produced. Estimates of potential pollution-emisson levels affecting land, air, and water were calculated from available data related to current surface and in situ tar-sand field experiments in the US. These data were then extrapolated to determine pollutant levels expected from conceptual commercial surface and in situ facilities producing 20,000 bbl/d. The likelihood-of-occurrence of these impacts was then assessed. Experience from other industries, including information concerning health and ecosystem damage from air pollutants, measurements of ground-water transport of organic pollutants, and the effectiveness of environmental-control technologies was used to make this assessment.

  7. The Corrosion and Corrosion Fatigue Behavior of Nickel Based Alloy Weld Overlay and Coextruded Claddings

    Science.gov (United States)

    Stockdale, Andrew

    The use of low NOx boilers in coal fired power plants has resulted in sulfidizing corrosive conditions within the boilers and a reduction in the service lifetime of the waterwall tubes. As a solution to this problem, Ni-based weld overlays are used to provide the necessary corrosion resistance however; they are susceptible to corrosion fatigue. There are several metallurgical factors which give rise to corrosion fatigue that are associated with the localized melting and solidification of the weld overlay process. Coextruded coatings offer the potential for improved corrosion fatigue resistance since coextrusion is a solid state coating process. The corrosion and corrosion fatigue behavior of alloy 622 weld overlays and coextruded claddings was investigated using a Gleeble thermo-mechanical simulator retrofitted with a retort. The experiments were conducted at a constant temperature of 600°C using a simulated combustion gas of N2-10%CO-5%CO2-0.12%H 2S. An alternating stress profile was used with a minimum tensile stress of 0 MPa and a maximum tensile stress of 300 MPa (ten minute fatigue cycles). The results have demonstrated that the Gleeble can be used to successfully simulate the known corrosion fatigue cracking mechanism of Ni-based weld overlays in service. Multilayer corrosion scales developed on each of the claddings that consisted of inner and outer corrosion layers. The scales formed by the outward diffusion of cations and the inward diffusion of sulfur and oxygen anions. The corrosion fatigue behavior was influenced by the surface finish and the crack interactions. The initiation of a large number of corrosion fatigue cracks was not necessarily detrimental to the corrosion fatigue resistance. Finally, the as-received coextruded cladding exhibited the best corrosion fatigue resistance.

  8. [Social marketers' lack of success in using CSM discipline to harness commercial resources and increase contraceptive prevalence].

    Science.gov (United States)

    Davies, J

    1984-01-01

    Social marketers have certainly shown that the CSM discipline can quickly and cost-effectively harness commercial resources to increase contraceptive prevalence. But why hasn't the social marketing idea caught on in more countries? According to Social Marketing Forum, only a tiny number of countries have active programs after more than a decade of effort. The most likely reason for this lack of success is doubt and fear on the part of both developing countries' officials and donor agencies about allowing marketing enthusiasts--with our very noticeable advertising methods--to join the family planning fight. And what has our answer been? Usually, a head-on retort such as, "But look at all the condoms we've sold]" And that gets us nowhere, because the successful peddling of 1 not-so-impressive method doesn't begin to balance the fears of a possible backlash that brash condom promotions could bring down on official heads. The lesson we should be learning is that social marketers possess to narrow an outlook and promote a small range of products that don't enthuse decisionmakers. Hence, we are often perceived as condom salesmen--and not much more. What should we be doing? We should be selling the idea of using private sector experience to assist national development. That means social development, particularly improved health, family planning and women's education. These 3 activities have proven effective in reducing fertility and would add up to a marketing opportunity--a longterm challenge that should enthuse dicisionmakers, private sector entrepreneurs and donor agencies alike. Further, our model--the commercial sector--is renowned for branching out and secceeding in a broad range of endeavors. As an example, Procter and Gamble uses separate divisions to market different products. Initiatives already exist in many countries to harness the private sector as a development tool. Social marketers should be leading the initiative--and benefitting from it, too. full text

  9. Mercury and methylmercury contents in mine-waste calcine, water, and sediment collected from the Palawan Quicksilver mine, Philippines

    Science.gov (United States)

    Gray, J.E.; Greaves, I.A.; Bustos, D.M.; Krabbenhoft, D.P.

    2003-01-01

    The Palawan Quicksilver mine, Philippines, produced about 2,900 t of mercury during mining of cinnabar ore from 1953 to 1976. More than 2,000,000 t of mine-waste calcines (retorted ore) were produced during mining, much of which were used to construct a jetty in nearby Honda Bay. Since 1995, high Hg contents have been found in several people living near the mine, and 21 of these people were treated for mercury poisoning. Samples of mine-waste calcine contain high total Hg concentrations ranging from 43-660 ??g/g, whereas total Hg concentrations in sediment samples collected from a mine pit lake and local stream vary from 3.7-400 ??g/g. Mine water flowing through the calcines is acidic, pH 3.1-4.3, and total Hg concentrations ranging from 18-31 ??g/l in this water significantly exceed the 1.0-??g/l drinking water standard for Hg recommended by the World Health Organization (WHO). Total Hg contents are generally lower in water samples collected from surrounding domestic wells, the mine pit lake, Honda Bay, and the nearby stream, varying from 0.008-1.4 ??g/l. Methylmercury concentrations in water draining mine calcines range from <0.02-1.4 ng/l, but methylmercury is highest in the pit lake water, ranging from 1.7-3.1 ng/l. Mercury methylation at the Palawan mine is similar to or higher than that found in other mercury mines worldwide. Much of the methylmercury generated in Palawan mine-waste calcines and those in Honda Bay is transferred to water, and then to marine fish and seafood. A food source pathway of Hg to humans is most likely in this coastal, high fish-consuming population.

  10. 基于分数阶偏微分方程和 CB 模型的彩色图像去噪方法%Novel Color Image Denoising Method Based on Fractional-Order Partial Differential Equation and CB Model

    Institute of Scientific and Technical Information of China (English)

    周千

    2016-01-01

    将分数阶偏微分理论和 CB 模型相结合应用于图像去噪,提出了一种基于分数阶偏微分方程和 CB 模型的彩色图像去噪方法。首先,将一副彩色图像分解为色度 C 和亮度 B 两部分,然后用分数阶偏微分模型处理亮度 B ,而对于色度C ,由于其受到单位长度的限制,在处理时非常困难,利用拉格朗日乘数法并通过添加辅助变量,将色度转化为两个近似的子问题,从而得到色度的近似处理方法,最后将处理后的亮度 B 和色度 C 合成为新的彩色图像。最后通过实验证明了该方法的有效性。%Combing fractional-order differential theory with Chromaticity-Brightness(CB) model ,a novel image denois-ing model was proposed ,which was based on fractional-order partial differential equation and CB model .Firstly ,a color im-age was decomposed into chromaticity component and brightness component .Secondly ,fractional-order differential model was used for brightness component .For chromaticity component ,Lagrange multipliers method was used and an auxiliary variable was added to approximate the chromaticity .Thirdly ,the retorted image was got by multiplying the recovered chro-maticity with recovered brightness .Finally ,it proved the validity of the proposed model through the experiment .

  11. Apparent Formation Factor for Leachate-Saturated Waste and Sediments: Examples from the USA and China

    Institute of Scientific and Technical Information of China (English)

    Philip J Carpenter; Ding Aizhong; Cheng Lirong; Liu Puxin; Chu Fulu

    2009-01-01

    The formation factor relates bulk resistivity to pore fluid resistivity in porous materials. Understanding the formation factor is essential in using electrical and electromagnetic methods to monitor leachate accumulations and movements both within and around landfills. Specifically, the formation factor allows leachate resistivity, the degree of saturation, and, possibly, even the hydraulic conductivity of the waste to be estimated from non-invasive surface measurements. In this study, apparent formation factors are computed for three landfills with different types of waste as well as sediments contaminated by landfill leachate. Resistivity soundings at the closed Mallard North landfill in suburban Chicago (Illinois, USA) mapped leachate surfaces that were confirmed by monitoring wells. The resistivity of leachate-saturated waste from resistivity sounding inversions was then divided by the leachate resistivity values measured in-situ to compute apparent formation factors (Fa) ranging from 1.6 to 4.9. A global Fa of 3.0±1.9 was computed for the entire monitored portion of this landfill At a nearby mixed laboratory waste landfill, a 2D inverted resistivity section was used to compute an Fa of 2.9. Finally, a distinctly different Fa value of 10.6±2.8 was computed for leachate-saturated retorted oil and organic compounds. The Fa for aquifers containing contaminated groundwater fall in the same range as aquifers with normal groundwater, 1.7-3.9. However, models from inverted sounding curves over these contaminated areas exhibit unusually low resistivity layers, which may be diagnostic of contamination.

  12. Science, practice, and human errors in controlling Clostridium botulinum in heat-preserved food in hermetic containers.

    Science.gov (United States)

    Pflug, Irving J

    2010-05-01

    The incidence of botulism in canned food in the last century is reviewed along with the background science; a few conclusions are reached based on analysis of published data. There are two primary aspects to botulism control: the design of an adequate process and the delivery of the adequate process to containers of food. The probability that the designed process will not be adequate to control Clostridium botulinum is very small, probably less than 1.0 x 10(-6), based on containers of food, whereas the failure of the operator of the processing equipment to deliver the specified process to containers of food may be of the order of 1 in 40, to 1 in 100, based on processing units (retort loads). In the commercial food canning industry, failure to deliver the process will probably be of the order of 1.0 x 10(-4) to 1.0 x 10(-6) when U.S. Food and Drug Administration (FDA) regulations are followed. Botulism incidents have occurred in food canning plants that have not followed the FDA regulations. It is possible but very rare to have botulism result from postprocessing contamination. It may thus be concluded that botulism incidents in canned food are primarily the result of human failure in the delivery of the designed or specified process to containers of food that, in turn, result in the survival, outgrowth, and toxin production of C. botulinum spores. Therefore, efforts in C. botulinum control should be concentrated on reducing human errors in the delivery of the specified process to containers of food.

  13. Botulism associated with commercially canned chili sauce--Texas and Indiana, July 2007.

    Science.gov (United States)

    2007-08-03

    On July 7 and July 11, 2007, public health officials in Texas and Indiana, respectively, reported to CDC four suspected cases of foodborne botulism, two in each state. Investigations conducted by state and local health departments revealed that all four patients had eaten brands of Castleberry's hot dog chili sauce before illness began. Botulinum toxin type A was detected in the serum of one Indiana patient and in a leftover chili mixture obtained from his home. CDC informed the Food and Drug Administration (FDA) of the apparent link between illness and consumption of the chili sauce. On July 18, FDA issued a consumer advisory, and the manufacturer, Castleberry's Food Company (Augusta, Georgia), subsequently recalled the implicated brand and several other products produced in the same set of retorts (commercial-scale pressure cookers for processing canned foods) at the same canning facility. Examination of the canning facility in Georgia during the outbreak investigation had identified deficiencies in the canning process. On July 19, the U.S. Department of Agriculture Food Safety and Inspection Service (FSIS) issued a press release that announced a recall of chili and certain meat products from the Castleberry canning facility and provided recommendations to consumers. That recall was expanded on July 21 to include additional canned products. A fifth case of botulism potentially linked to one of the recalled products is under investigation in California. This report describes the ongoing investigation by members of OutbreakNet and others and the measures undertaken to control the outbreak, which is the first outbreak of foodborne botulism in the United States associated with a commercial canning facility in approximately 30 years. Clinicians should be vigilant for symptoms of botulism, including symmetric cranial nerve palsies, especially if accompanied by descending flaccid paralysis. Consumers should not eat any of the recalled chili sauce or other recalled

  14. Comprehensive database of Manufactured Gas Plant tars. Part B. Aliphatic and aromatic compounds.

    Science.gov (United States)

    Gallacher, Christopher; Thomas, Russell; Lord, Richard; Kalin, Robert M; Taylor, Chris

    2017-08-15

    Coal tars are a mixture of organic and inorganic compounds that were produced as a by-product from the manufactured gas and coke making industries. The composition of the tar produced varies depending on many factors; these include the temperature of production and the type of retort used. As different production processes produce different tars, a comprehensive database of the compounds present within coal tars from different production processes is a valuable resource. Such a database would help to understand how their chemical properties differ and what hazards the compounds present within these tars might pose. This study focuses on the aliphatic and aromatic compounds present in a database of 16 different tars from five different production processes. Samples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatised post-extraction using N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) with 1% trimethylchlorosilane (TMCS). The derivatised samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS). A total of 198 individual aliphatic and 951 individual aromatic compounds were detected within 16 tar samples produced by five different production processes. The polycyclic aromatic hydrocarbon (PAH) content of coal tars varies greatly depending on the production process used to obtain the tars and this is clearly demonstrated within the results. The aliphatic composition of the tars provided an important piece of analytical information that would have otherwise been missed with the detection of petrogenic compounds such as alkyl cyclohexanes. The aromatic compositions of the tar samples varied greatly between the different production processes investigated and useful analytical information was obtained about the individual production process groups. Alkyl cyclohexanes were detected in all samples from sites known to operate Carbureted Water Gas plants and not detected in

  15. Comprehensive database of Manufactured Gas Plant tars. Part C. Heterocyclic and hydroxylated polycyclic aromatic hydrocarbons.

    Science.gov (United States)

    Gallacher, Christopher; Thomas, Russell; Lord, Richard; Kalin, Robert M; Taylor, Chris

    2017-08-15

    Coal tars are a mixture of organic and inorganic compounds that were by-products from the manufactured gas and coke making industries. The tar compositions varied depending on many factors such as the temperature of production and the type of retort used. For this reason a comprehensive database of the compounds found in different tar types is of value to understand both how their compositions differ and what potential chemical hazards are present. This study focuses on the heterocyclic and hydroxylated compounds present in a database produced from 16 different tars from five different production processes. Samples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatized post-extraction using N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) with 1% trimethylchlorosilane (TMCS). The derivatized samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS). A total of 865 heterocyclic compounds and 359 hydroxylated polycyclic aromatic hydrocarbons (PAHs) were detected in 16 tar samples produced by five different processes. The contents of both heterocyclic and hydroxylated PAHs varied greatly with the production process used, with the heterocyclic compounds giving information about the feedstock used. Of the 359 hydroxylated PAHs detected the majority would not have been be detected without the use of derivatization. Coal tars produced using different production processes and feedstocks yielded tars with significantly different heterocyclic and hydroxylated contents. The concentrations of the individual heterocyclic compounds varied greatly even within the different production processes and provided information about the feedstock used to produce the tars. The hydroxylated PAH content of the samples provided important analytical information that would otherwise not have been obtained without the use of derivatization and GCxGC/TOFMS. Copyright © 2017 John Wiley & Sons, Ltd.

  16. Technology assessment: environmental, health, and safety impacts associated with oil recovery from US tar-sand deposits

    Energy Technology Data Exchange (ETDEWEB)

    Daniels, J.I.; Anspaugh, L.R.; Ricker, Y.E.

    1981-10-13

    The tar-sand resources of the US have the potential to yield as much as 36 billion barrels (bbls) of oil. The tar-sand petroleum-extraction technologies now being considered for commercialization in the United States include both surface (above ground) systems and in situ (underground) procedures. The surface systems currently receiving the most attention include: (1) thermal decomposition processes (retorting); (2) suspension methods (solvent extraction); and (3) washing techniques (water separation). Underground bitumen extraction techniques now being field tested are: (1) in situ combustion; and (2) in situ steam-injection procedures. At this time, any commercial tar-sand facility in the US will have to comply with at least 7 major federal regulations in addition to state regulations; building, electrical, and fire codes; and petroleum-industry construction standards. Pollution-control methods needed by tar-sand technologies to comply with regulatory standards and to protect air, land, and water quality will probably be similar to those already proposed for commercial oil-shale systems. The costs of these systems could range from about $1.20 to $2.45 per barrel of oil produced. Estimates of potential pollution-emisson levels affecting land, air, and water were calculated from available data related to current surface and in situ tar-sand field experiments in the US. These data were then extrapolated to determine pollutant levels expected from conceptual commercial surface and in situ facilities producing 20,000 bbl/d. The likelihood-of-occurrence of these impacts was then assessed. Experience from other industries, including information concerning health and ecosystem damage from air pollutants, measurements of ground-water transport of organic pollutants, and the effectiveness of environmental-control technologies was used to make this assessment.

  17. Western oil shale development: a technology assessment. Volume 8. Health effects of oil shale development

    Energy Technology Data Exchange (ETDEWEB)

    Rotariu, G.J.

    1982-02-01

    Information on the potential health effects of a developing oil shale industry can be derived from two major sources: (1) the historical experience in foreign countries that have had major industries; and (2) the health effects research that has been conducted in the US in recent years. The information presented here is divided into two major sections: one dealing with the experience in foreign countries and the second dealing with the more recent work associated with current oil shale development in the US. As a result of the study, several observations can be made: (1) most of the current and historical data from foreign countries relate to occupational hazards rather than to impacts on regional populations; (2) neither the historical evidence from other countries nor the results of current research have shown pulmonary neoplasia to be a major concern, however, certain types of exposure, particularly such mixed source exposures as dust/diesel or dust/organic-vapor have not been adequately studied and the lung cancer question is not closed; (3) the industry should be alert to the incidence of skin disease in the industrial setting, however, automated techniques, modern industrial hygiene practices and realistic personal hygiene should greatly reduce the hazards associated with skin contact; and (4) the entire question of regional water contamination and any resultant health hazard has not been adequately addressed. The industrial practice of hydrotreating the crude shale oil will diminish the carcinogenic hazard of the product, however, the quantitative reduction of biological activity is dependent on the degree of hydrotreatment. Both Soviet and American experimentalists have demonstrated a correlation betweed carcinogenicity/toxicity and retorting temperature; the higher temperatures producing the more carcinogenic or toxic products.

  18. Transport and fate of mercury under different hydrologic regimes in polluted stream in mining area

    Institute of Scientific and Technical Information of China (English)

    Yan Lin; Thorjφrm Larssen; Rolf D. Vogt; Xinbin Feng; Hua Zhang

    2011-01-01

    Seepage from Hg mine wastes and calcines contains high concentrations of mercury (Hg).Hg pollution is a major environmental problem in areas with abandoned mercury mines and retorting units.This study evaluates factors, especially the hydrological and sedimentary variables, governing temporal and spatial variation in levels and state of mercury in streams impacted by Hg contaminated runoff.Samples were taken during different flow regimes in the Wanshan Hg mining area in Guizhou Province, China.In its headwaters the sampled streams/rivers pass by several mine wastes and calcines with high concentration of Hg.Seepage causes serious Hg contamination to the downstream area.Concentrations of Hg in water samples showed significant seasonal variations.Periods of higher flow showed high concentrations of total Hg (THg) in water due to more particles being re-suspended and transported.The concentrations of major anions (e.g., CI-, F-, NO3- and 8042-) were lower during higher flow due to dilution.Due to both sedimentation of particles and dilution from tributaries the concentration of THg decreased from 2100 ng/L to background levels (< 50 ng/L) within 10 km distance downstream.Sedimentation is the main reason for the fast decrease of the concentration, it accounts for 69% and 60%for higher flow and lower flow regimes respectively in the upper part of the stream.Speciation calculation of the dissolved Hg fraction (DHg) (using Visual MINTEQ) showed that Hg(OH)2 associated with dissolved organic matter is the main form of Hg in dissolved phase in surface waters in Wanshan (over 95%).

  19. Environmental analysis of the eastern shale hydroretorting data base

    Energy Technology Data Exchange (ETDEWEB)

    Rex, R.C. Jr.; Lynch, P.A.

    1984-05-01

    The purpose of this study is to perform a preliminary environmental analysis of certain chemical aspects of Eastern shale hydroretorting utilizing the data from the twenty-one (21) bench scale unit runs conducted during the HYTORT Feasibility Study. The report contained herein primarily addresses the potential types and quantities of pollutants emanating directly from the hydroretorting of oil shale (i.e., the retort paper). The following areas are discussed in detail: nitrogen distribution; sulfur distribution; gas trace constituents; sour water constituents; and shale leachates. The results of the analysis have not identified any potential pollutants or quantities which cannot be brought to conformance with currently promulgated environmental standards using existing technology. Additional analysis of the process chemistry portion of the HYTORT data base, coupled with the process and mechanical design information, can provide a methodology for dealing with the identified environmental concerns as they pertain to a commercial facility. Section 5.0 of the report delineates the areas which should be addressed in a continuing analysis of environmental concerns. The suggested program divides naturally into three phases, of which Phase 1 has been completed: Phase 1 - Environmental Analysis of the Eastern Shale Hydroretorting Data Base; Phase 2 - Generic (non-site-specific) Environmental Analysis; and Phase 3 - Site-Specific Environmental Analysis. Phase 2 details the anticipated emissions from all areas of a commercial HYTORT facility operating on a typical Eastern shale using the results of this Phase 1 effort and the HYTORT data base. Phase 3 utilizes this information to assess the effects of plant emissions on chosen sites in the context of applicable laws and regulations. 7 references, 18 figures, 2 tables.

  20. Método de varredura para exame de criadouros de vetores de dengue e febre amarela urbana Sweeping method to scan breeding places for dengue and urban yellow fever vectors

    Directory of Open Access Journals (Sweden)

    Roseane Lieko Kubota

    2003-04-01

    Full Text Available Com objetivo de estimar o número mínimo de varreduras para coletar uma amostra representativa das larvas presentes em um grande recipiente, foram adicionadas 200 larvas de quarto estádio em um tambor de 80 litros de água. Com auxílio de peneira plástica, foram feitas dez varreduras em cada réplica do experimento. Os resultados indicaram que oito varreduras foram suficientes para coletar até 72% do total de 200 larvas de quarto estadio presentes no criadouro, ou seja, uma média de 143±1,97. A técnica mostrou ser de fácil e eficiente execução quanto à inspeção de criadouros com grande volume de água. Isto reforça sua utilização como instrumento com grande potencial para vigilância vetorial na rotina dos programas de controle de vetores do dengue e febre amarela.To estimate the minimum numbers of "sweepings" for a representative sampling of larvae in a large container. 200 larvae in 4th stage were added in an 80-liter drum to carry out the experiment, in each retort was made 10 sweepings using a plastic sieve. Two hundred larvae in stage 4 were added to an 80-liter-drum and using a plastic sieve10 sweepings were carried out in each experiment replicate. The results showed that 8 sweepings were enough to collect up to 72% of the total sample in the container, i.e., an average of 143±1.97. The proposed method proved to be easily and effectively implemented and allowed for the inspection of containers with large water volumes. These findings reinforce its use as an important potential tool in the routine vectorial surveillance of control programs of dengue and yellow fever.

  1. Development Direction of Resource Utilization of Phosphogypsum%磷石膏资源化利用的发展方向

    Institute of Scientific and Technical Information of China (English)

    孙志立; 车建青

    2014-01-01

    分析了目前国内磷石膏利用面临的难题和必须解决的基本问题,提出了磷石膏资源化利用的创新思路及发展方向。磷石膏制硫酸联产水泥是磷石膏资源化利用的发展方向,主要有中空长窑法、预热器窑法和窑外分解法,其中窑外分解法采用竖罐来获得高浓度窑气,并添加矿化剂,无需添加天然石膏或硫磺,可使磷石膏的利用率提高至100%。%An analysis is made of the problems facing utilization of phosphogypsum at present in China and basic problems needing to be solved , and innovation ideas and development direction for resource utilization of phosphogypsum are suggested .Production of sulfuric acid with co-production of cement from phosphogypsum is the development direction of resource utilization of phosphogypsum , the main processes are hollow long kiln method , preheater kiln method and outside kiln decomposition method, among which, outside kiln decomposition method uses vertical retort to obtain high concentrated kiln gas , and adds mineralizer , has no need to add natural gypsum or sulfur , can increase utilization ratio of phoshogypsum to 100%.

  2. Environmental data energy technology characterizations: synthetic fuels

    Energy Technology Data Exchange (ETDEWEB)

    1980-04-01

    Environmental Data Energy Technology Characterizations are publications which are intended to provide policy analysts and technical analysts with basic environmental data associated with key energy technologies. This publication provides documentation on synthetic fuels (coal-derived and oil shale). The transformation of the energy in coal and oil shale into a more useful form is described in this publication in terms of major activity areas in the synthetic fuel cycles, that is, in terms of activities which produce either an energy product or a fuel leading to the production of an energy product in a different form. The activities discussed in this document are coal liquefaction, coal gasification, in-situ gasification, and oil shales. These activities represent both well-documented and advanced activity areas. The former activities are characterized in terms of actual operating data with allowance for future modification where appropriate. Emissions are assumed to conform to environmental standards. The advanced activity areas examined are those like coal liquefaction and in-situ retorting of oil shale. For these areas, data from pilot or demonstration plants were used where available; otherwise, engineering studies provided the data. The organization of the chapters in this volume is designed to support the tabular presentation in the summary volume. Each chapter begins with a brief description of the activity under consideration. The standard characteristics, size, availability, mode of functioning and place in the fuel cycle are presented. Next, major legislative and/or technological factors influencing the commercial operation of the activity are offered. Discussions of resources consumed, residuals produced, and economics follow. To aid in comparing and linking the different activity areas, data for each area are normalized to 10/sup 12/ Btu of energy output from the activity.

  3. Detection and Characterization of Package Defects and Integrity Failure using Dynamic Scanning Infrared Thermography (DSIRT).

    Science.gov (United States)

    Morris, Scott A

    2016-02-01

    A dynamic scanning infrared thermography (DSIRT) system developed at the Univ. of Illinois Urbana-Champaign (UIUC) Packaging Lab relies on variation in transient thermal artifacts to indicate defects, and offers the possibility of characterization of many types of materials and structures. These include newer polymer and laminate-based structures for shelf-stable foods that lack a reliable, nondestructive method for inspection, which is a continuing safety issue. Preliminary trials were conducted on a polyester/aluminum foil/polypropylene retort pouch laminate containing artificially-induced failed seal and insulating inclusion defects ranging from 1 to 10 mm wide in the plane of the seal. The samples were placed in relative motion to a laterally positioned infrared laser, inducing heating through the plane of the seal. The emergent thermal artifact on the obverse side was sensed using either a bolometer camera or a thermopile sensor, with thermal anomalies indicating potential defects and the results of each sensors were compared. The bolometer camera detected defects to the limit of its measured optical resolution-approximately 1 mm at 20 cm-although the lower-resolution thermopile sensors were only capable of detecting 5 mm defects even at closer distances of approximately 5 mm. In addition, a supplementary magnification system was fitted to the bolometer camera which increased resolution but reduced field of view and would require a much higher frame rate to be useful. Automatic processing of the image data rapidly detected the model defects and can lead to development of an automated inspection system.  Much higher material throughput speeds are feasible using faster instruments, and the system is scalable. © 2015 Institute of Food Technologists®

  4. Synthesis of current data for Hg in areas of geologic resource extraction contamination and aquatic systems in China.

    Science.gov (United States)

    Qiu, Guangle; Feng, Xinbin; Jiang, Guibin

    2012-04-01

    China has become the largest contributor of anthropogenic atmospheric mercury (Hg) in the world owing to its fast growing economy and the largest of populations. Over the last two decades, Hg has become of increasing environmental concern in China and much has been published on its distribution, transportation, methylation, and bioaccumulation in aquatic systems and areas of geologic resource extraction contaminated sites, such as coal-fired power plants, non-ferrous smelters, Hg mining and retorting sites, Au amalgam, landfills, chemical plants, etc.. Environmental compartments, like soil, water, air, and crop from areas of geologic resource extraction contamination, especially from Hg mining regions, exhibit elevated values of total-Hg and MMHg. Risk assessments indicate that the consumption of rice, which has a high bioaccumulation of MMHg, has become the dominant pathway of MMHg exposure of inhabitants living in Hg mining areas. Low concentrations less than 5ngl(-1) in total-Hg can be observed in rivers from remote areas, however, high concentrations that reached 1600ngl(-1) in total-Hg can be found in rivers from industrial and urban areas. The studies of hydropower reservoirs of southwest China indicated the old reservoirs act as net sinks for total-Hg and net sources of MMHg, while newly established ones act as net sinks for both total-Hg and MMHg, which is in sharp contrast to the evolution of biomethylation in reservoirs established in the boreal belt of North America and Eurasia. Fish from those reservoirs have relatively low levels of total-Hg, which do not exceed the maximum total-Hg limit of 0.5mgkg(-1) recommended by WHO. Currently, however, there is still a large data gap regarding Hg even in the areas mentioned above in China, which results in poor understanding of its environmental biogeochemistry. Moreover, for a better understanding of human and environmental health effects caused by the fast growing economy, long-term Hg monitoring campaigns are

  5. 大功率高速行星齿轮减速器动载系数计算研究%Study on the Dynamic Load Coefficient of Certain Planetary Reducer with Herringbone Gears using on Marine

    Institute of Scientific and Technical Information of China (English)

    尤明明

    2011-01-01

    In order to manufacture the certain NGW planetary reducer with high- power and high speed, it uses the method of convergence mass to predigest rotary parts and the coupings between parts, and finally gets a spring-mass system.In this process, it takes the vibrancy displacement of parts along planar orientation and rotational orientation into accout, finds the retortion- planar couping model, and finally gets the reducer' dynamic load coefficient via solving differential eguation.Based on the design rotating speed, it validates the rationality of structure and parameters.%针对某NGW型大功率高速行星齿轮减速器,采用集中质量法将减速器各运动构件简化为集中质量,各个构件之间以及构件与机架之间的连接简化为弹性元件,整个系统简化为一个弹簧质量系统.建模中考虑了齿轮类构件、行星架组件的质心沿横向和纵向的振动位移以及构件由于扭转振动产生的角位移,最终建立了系统的扭转-横向振动耦合模型.通过求解动力学微分方程组,获取表征系统振动特性的内外啮合齿轮副在频域内的动载系数,根据设计输入转速,验证了此减速器各结构参数设计的合理性.

  6. Fossil Energy Program report. University activities, 1 October 1977-30 September 1978. [US DOE supported

    Energy Technology Data Exchange (ETDEWEB)

    None

    1979-12-01

    This document describes the Fossil Energy-supported contract and project activity for FY 1978. The primary thrust of the Program is on coal - especially direct coal combustion and what can be done to increase the environmental acceptability of coal. We are concerned with developing cleaner technologies, and we are working on precombustion cleanup, fluidized-bed combustion, and post-combustion cleanup. Longer range technologies are being developed that will use coal more efficiently; for example, magnetohydrodynamics, fuel cells, and high-temperature turbine utilization. Another priority is the development of a capability to produce synthetic fuels from coal. We are also engaged in a coal mining research and development program that focuses on increased mine productivity and workers' safety through the development of improved technologies. Our activity in the petroleum and gas research areas is intended to complement efforts in the private sector, which are to be further stimulated by new pricing or Federal incentives. Our present enhanced oil recovery efforts represent a shift in emphasis toward longer range, high-technology development projects instead of numerous field demonstrations and tests. The enhanced gas program emphasizes activities to increase our knowledge of the size and economic productivity of the unconventional gas resources. We are also involved in oil shale development, with the major research concentration on in situ retorting. We are continually assessing our program. Total annual funding has increased from $58 million in FY 1973 to $881 million in FY 1979. Fossil Energy is working closely with all parts of the Department of Energy, other appropriate Federal agencies, industry, and universities to insure that we maintain a balanced, aggressive, and responsive program suited to our national needs.

  7. New packaging technologies for the 21st century.

    Science.gov (United States)

    Eilert, S J

    2005-09-01

    This paper reviews the major influencers that will drive change in meat packaging. A review of the current state of fresh-meat packaging in the US has shown a continued evolution to case ready packaging, with 60% of the packages audited being in the case ready format, versus 49% just two years earlier. Additionally, the market is moving to a higher degree of convenience in the meat case, and reducing the linear feet devoted to fresh meat (69% fresh meat linear feet two years ago, versus 63% in 2004). Additional evidence for the growth of convenience items was shown by a 48% growth in shelf stable meal kits between 1998 and 2003. Packaging innovations have been developed to meet these needs for convenience, but have largely been implemented outside of the meat industry. These include, but are not limited to, lines of hand-held soups, self-heating cans and cartons that are replacing the traditional steel can for retort purposes. The recent developments of films that are ovenable in traditional as well as microwave ovens are critical to the further advancement of convenience meat items. Material costs are also driving the need for packaging innovations. Polyethylene costs rose 20% during the second half of 2003, which is largely due to increased petroleum costs. As petroleum costs are sustained at the current high levels, renewable packaging for food, such as materials based on polylactide, will become more feasible. Labor costs and availability at retail will continue to drive the demand for case ready packaging innovations. The recent regulatory approval of carbon monoxide in fresh meat packaging in the US will enable greater usage of low oxygen packaging formats and should provide greater retail acceptance of case ready in the US.

  8. Integrating Nuclear Energy to Oilfield Operations – Two Case Studies

    Energy Technology Data Exchange (ETDEWEB)

    Eric P. Robertson; Lee O. Nelson; Michael G. McKellar; Anastasia M. Gandrik; Mike W. Patterson

    2011-11-01

    Fossil fuel resources that require large energy inputs for extraction, such as the Canadian oil sands and the Green River oil shale resource in the western USA, could benefit from the use of nuclear power instead of power generated by natural gas combustion. This paper discusses the technical and economic aspects of integrating nuclear energy with oil sands operations and the development of oil shale resources. A high temperature gas reactor (HTGR) that produces heat in the form of high pressure steam (no electricity production) was selected as the nuclear power source for both fossil fuel resources. Both cases were based on 50,000 bbl/day output. The oil sands case was a steam-assisted, gravity-drainage (SAGD) operation located in the Canadian oil sands belt. The oil shale development was an in-situ oil shale retorting operation located in western Colorado, USA. The technical feasibility of the integrating nuclear power was assessed. The economic feasibility of each case was evaluated using a discounted cash flow, rate of return analysis. Integrating an HTGR to both the SAGD oil sands operation and the oil shale development was found to be technically feasible for both cases. In the oil sands case, integrating an HTGR eliminated natural gas combustion and associated CO2 emissions, although there were still some emissions associated with imported electrical power. In the in situ oil shale case, integrating an HTGR reduced CO2 emissions by 88% and increased natural gas production by 100%. Economic viabilities of both nuclear integrated cases were poorer than the non-nuclear-integrated cases when CO2 emissions were not taxed. However, taxing the CO2 emissions had a significant effect on the economics of the non-nuclear base cases, bringing them in line with the economics of the nuclear-integrated cases. As we move toward limiting CO2 emissions, integrating non-CO2-emitting energy sources to the development of energy-intense fossil fuel resources is becoming

  9. Mercury mine drainage and processes that control its environmental impact

    Science.gov (United States)

    Rytuba, J.J.

    2000-01-01

    Mine drainage from mercury mines in the California Coast Range mercury mineral belt is an environmental concern because of its acidity and high sulfate, mercury, and methylmercury concentrations. Two types of mercury deposits are present in the mineral belt, silica-carbonate and hot-spring type. Mine drainage is associated with both deposit types but more commonly with the silica-carbonate type because of the extensive underground workings present at these mines. Mercury ores consisting primarily of cinnabar were processed in rotary furnaces and retorts and elemental mercury recovered from condensing systems. During the roasting process mercury phases more soluble than cinnabar are formed and concentrated in the mine tailings, commonly termed calcines. Differences in mineralogy and trace metal geochemistry between the two deposit types are reflected in mine drainage composition. Silica-carbonate type deposits have higher iron sulfide content than hot- spring type deposits and mine drainage from these deposits may have extreme acidity and very high concentrations of iron and sulfate. Mercury and methylmercury concentrations in mine drainage are relatively low at the point of discharge from mine workings. The concentration of both mercury species increases significantly in mine drainage that flows through and reacts with calcines. The soluble mercury phases in the calcines are dissolved and sulfate is added such that methylation of mercury by sulfate reducing bacteria is enhanced in calcines that are saturated with mine drainage. Where mercury mine drainage enters and first mixes with stream water, the addition of high concentrations of mercury and sulfate generates a favorable environment for methylation of mercury. Mixing of oxygenated stream water with mine drainage causes oxidation of dissolved iron(II) and precipitation of iron oxyhydroxide that accumulates in the streambed. Both mercury and methylmercury are strongly adsorbed onto iron oxyhydroxide over the p

  10. John Rawls’Theory of International Justice:Critique and Defense%罗尔斯的国际正义理论:批判与捍卫

    Institute of Scientific and Technical Information of China (English)

    高景柱

    2015-01-01

    美国政治哲学家约翰·罗尔斯的国际正义理论是当代政治哲学界的一种重要理论,学界对此产生了激烈的纷争。世界主义者对罗尔斯的国际正义理论的批判主要侧重于罗尔斯忽视了全球背景不正义的问题、不应该以“人民”为道德关怀的终极对象、给定的人权清单过于单薄、对非自由的人民过于“宽容”和不应该拒斥全球分配正义等方面。以塞缪尔·弗里曼等人为代表的罗尔斯的辩护者回应了世界主义者对罗尔斯的国际正义理论的批判,这种回应虽然有助于澄清罗尔斯的国际正义理论,但是并没有成功回应世界主义者对罗尔斯的国际正义理论的诘难。%John Rawls’theory of international justice is an important theory in contemporary political philosophy.Some cosmopolitans criticize John Rawls’theory of international justice,arguing that John Rawls ignores the injustice of the global background and should not take the “people”as the ultimate moral concern.Others claim that the human rights on Rawls’truncated list are too thin and that John Rawls should not refuse international distributive justice.Samuel Freeman and other scholars retort the criticism of cosmopolitans,but their arguments are questionable.

  11. GIS-based Geospatial Infrastructure of Water Resource Assessment for Supporting Oil Shale Development in Piceance Basin of Northwestern Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, Wei [Colorado School of Mines, Golden, CO (United States) Dept. of Geology and Geological Engineering; Minnick, Matthew D [Colorado School of Mines, Golden, CO (United States) Dept. of Geology and Geological Engineering; Mattson, Earl D [Idaho National Lab. (INL), Idaho Falls, ID (United States); Geza, Mengistu [Colorado School of Mines, Golden, CO (United States) Dept. of Cilvil and Environmental Engineering; Murray, Kyle E. [Univ. of Oklahoma, Norman, OK (United States) Oklahoma Geological Survey

    2015-04-01

    Oil shale deposits of the Green River Formation (GRF) in Northwestern Colorado, Southwestern Wyoming, and Northeastern Utah may become one of the first oil shale deposits to be developed in the U.S. because of their richness, accessibility, and extensive prior characterization. Oil shale is an organic-rich fine-grained sedimentary rock that contains significant amounts of kerogen from which liquid hydrocarbons can be produced. Water is needed to retort or extract oil shale at an approximate rate of three volumes of water for every volume of oil produced. Concerns have been raised over the demand and availability of water to produce oil shale, particularly in semiarid regions where water consumption must be limited and optimized to meet demands from other sectors. The economic benefit of oil shale development in this region may have tradeoffs within the local and regional environment. Due to these potential environmental impacts of oil shale development, water usage issues need to be further studied. A basin-wide baseline for oil shale and water resource data is the foundation of the study. This paper focuses on the design and construction of a centralized geospatial infrastructure for managing a large amount of oil shale and water resource related baseline data, and for setting up the frameworks for analytical and numerical models including but not limited to three-dimensional (3D) geologic, energy resource development systems, and surface water models. Such a centralized geospatial infrastructure made it possible to directly generate model inputs from the same database and to indirectly couple the different models through inputs/outputs. Thus ensures consistency of analyses conducted by researchers from different institutions, and help decision makers to balance water budget based on the spatial distribution of the oil shale and water resources, and the spatial variations of geologic, topographic, and hydrogeological Characterization of the basin. This endeavor

  12. Five Relationship Paradigms of "Teaching" and "Learning"%论“教”与“学”的五种关系范型

    Institute of Scientific and Technical Information of China (English)

    张荣伟

    2012-01-01

    As to the relationship of teaching and learning,there are five ideal paradigms at present: less teaching and more learning;learning before teaching;learning-oriented teaching;integration of teaching and learning;learning by teaching.In comparison,less teaching more learning is a kind of effective teaching idea criticizing more teaching less learning;learning before teaching is a kind of classroom teaching model breaking teaching before learning;learning-oriented teaching is a kind of teaching activity logic retorting teaching-oriented learning;integration of teaching and learning is kind of teaching collaborative consciousness pointing against separation of teaching and learning;learning by teaching is a kind of teachers' profession realm transcending mutual harming of teaching and learning.The theoretical value of discussing the five ideal paradigms is to establish a cognitive frame of teaching reform in China.%就"教"与"学"的关系而言,当前大致存在着"少教多学"、"先学后教"、"以学定教"、"教学合一"、"教学相长"五种范型。其中",少教多学"主要表征为一种批判"多教少学"的有效教学理念";先学后教"主要表征为一种突破"先教后学"的课堂教学模式;"以学定教"主要表征为一种反驳"以教定学"的教学活动逻辑;"教学合一"主要表征为一种针对"教学分离"的教学协同意识";教学相长"主要表征为一种超越"教学互损"的教师职业境界。探讨这五种关系范型的理论价值在于构建一个关于中国基础教育教学改革的总体认知框架。

  13. Concentration, distribution, and translocation of mercury and methylmercury in mine-waste, sediment, soil, water, and fish collected near the Abbadia San Salvatore mercury mine, Monte Amiata district, Italy.

    Science.gov (United States)

    Rimondi, Valentina; Gray, John E; Costagliola, Pilario; Vaselli, Orlando; Lattanzi, Pierfranco

    2012-01-01

    The distribution and translocation of mercury (Hg) was studied in the Paglia River ecosystem, located downstream from the inactive Abbadia San Salvatore mine (ASSM). The ASSM is part of the Monte Amiata Hg district, Southern Tuscany, Italy, which was one of the world's largest Hg districts. Concentrations of Hg and methyl-Hg were determined in mine-waste calcine (retorted ore), sediment, water, soil, and freshwater fish collected from the ASSM and the downstream Paglia River. Concentrations of Hg in calcine samples ranged from 25 to 1500 μg/g, all of which exceeded the industrial soil contamination level for Hg of 5 μg/g used in Italy. Stream and lake sediment samples collected downstream from the ASSM ranged in Hg concentration from 0.26 to 15 μg/g, of which more than 50% exceeded the probable effect concentration for Hg of 1.06 μg/g, the concentration above which harmful effects are likely to be observed in sediment-dwelling organisms. Stream and lake sediment methyl-Hg concentrations showed a significant correlation with TOC indicating considerable methylation and potential bioavailability of Hg. Stream water contained Hg as high as 1400 ng/L, but only one water sample exceeded the 1000 ng/L drinking water Hg standard used in Italy. Concentrations of Hg were elevated in freshwater fish muscle samples and ranged from 0.16 to 1.2 μg/g (wet weight), averaged 0.84 μg/g, and 96% of these exceeded the 0.3 μg/g (methyl-Hg, wet weight) USEPA fish muscle standard recommended to protect human health. Analysis of fish muscle for methyl-Hg confirmed that >90% of the Hg in these fish is methyl-Hg. Such highly elevated Hg concentrations in fish indicated active methylation, significant bioavailability, and uptake of Hg by fish in the Paglia River ecosystem. Methyl-Hg is highly toxic and the high Hg concentrations in these fish represent a potential pathway of Hg to the human food chain.

  14. La eritropoyetina un neuroprotector potencial Erythropoietin: A potential neuroreceptor

    Directory of Open Access Journals (Sweden)

    Alain Valdivia Acosta

    2007-08-01

    Full Text Available La importante función fisiológica de la hormona eritropoyetina en el proceso eritropoyético se descubrió hace alrededor de un siglo. Mas recientemente se ha trabajado en su obtención por vía recombinante para su aplicación en pacientes con anemias agudas o crónicas, causadas por diferentes afecciones. Esta terapia mejora, sin lugar a duda, la calidad de vida de estos pacientes. A partir del año 1998, se reportaron por primera vez las propiedades neuroprotectoras de la eritropoyetina y se realizaron estudios que así lo corroboraron con el empleo de modelos de daño cerebral, tanto in vitro como in vivo. Los estudios actuales consisten en dilucidar a profundidad los mecanismos de acción por los cuales la eritropoyetina muestra sus propiedades neuroprotectoras y en obtener una adecuada biodisponibildad de la molécula para su aplicación segura en la terapéutica de afecciones del cerebro. El presente trabajo recopila información actualizada sobre la eritropoyetina como agente neuroprotector y refiere la continuidad de estudios para su aplicación en la clínica.A century ago, significant physiolgical function of Erithropoietin was discovered. More recently, it has been working on its obtention by a recombinant via for application in patients presenting with acute and chronic anemia, from different afections. This type of therapy improves undoubtedly, life quality of these patients. From 1998, neuroprotective properties of Erythropoietin were retorted for the first time, and we performed studies corroborating it b y means of use of bran damage model, both, in vitro and in vivo. Present studies are designed to elucidate deeply action mechanisms by which Erythropoietin shows its neuroprotective properties and to obtain a appropriate bioavailability of molecule for a accurate application in therapeutics of bran afections. Present paper collets updated information on Erythropoietin as a neuroprotective agent, and refers to continuity of

  15. A Streamlined Approach by a Combination of Bioindication and Geostatistical Methods for Assessing Air Contaminants and Their Effects on Human Health in Industrialized Areas: A Case Study in Southern Brazil

    Directory of Open Access Journals (Sweden)

    Angélica B. Ferreira

    2017-09-01

    Full Text Available Industrialization in developing countries associated with urban growth results in a number of economic benefits, especially in small or medium-sized cities, but leads to a number of environmental and public health consequences. This problem is further aggravated when adequate infrastructure is lacking to monitor the environmental impacts left by industries and refineries. In this study, a new protocol was designed combining biomonitoring and geostatistics to evaluate the possible effects of shale industry emissions on human health and wellbeing. Futhermore, the traditional and expensive air quality method based on PM2.5 measuring was also used to validate the low-cost geostatistical approach. Chemical analysis was performed using Energy Dispersive X-ray Fluorescence Spectrometer (EDXRF to measure inorganic elements in tree bark and shale retorted samples in São Mateus do Sul city, Southern Brazil. Fe, S, and Si were considered potential pollutants in the study area. Distribution maps of element concentrations were generated from the dataset and used to estimate the spatial behavior of Fe, S, and Si and the range from their hot spot(s, highlighting the regions sorrounding the shale refinery. This evidence was also demonstrated in the measurements of PM2.5 concentrations, which are in agreement with the information obtained from the biomonitoring and geostatistical model. Factor and descriptive analyses performed on the concentrations of tree bark contaminants suggest that Fe, S, and Si might be used as indicators of industrial emissions. The number of cases of respiratory diseases obtained from local basic health unit were used to assess a possible correlation between shale refinery emissions and cases of repiratory disease. These data are public and may be accessed on the website of the the Brazilian Ministry of Health. Significant associations were found between the health data and refinery activities. The combination of the spatial

  16. A new laboratory approach to shale analysis using NMR relaxometry

    Science.gov (United States)

    Washburn, Kathryn E.; Birdwell, Justin E.; Baez, Luis; Beeney, Ken; Sonnenberg, Steve

    2013-01-01

    Low-field nuclear magnetic resonance (LF-NMR) relaxometry is a non-invasive technique commonly used to assess hydrogen-bearing fluids in petroleum reservoir rocks. Measurements made using LF-NMR provide information on rock porosity, pore-size distributions, and in some cases, fluid types and saturations (Timur, 1967; Kenyon et al., 1986; Straley et al., 1994; Brown, 2001; Jackson, 2001; Kleinberg, 2001; Hurlimann et al., 2002). Recent improvements in LF-NMR instrument electronics have made it possible to apply methods used to measure pore fluids to assess highly viscous and even solid organic phases within reservoir rocks. T1 and T2 relaxation responses behave very differently in solids and liquids; therefore the relationship between these two modes of relaxation can be used to differentiate organic phases in rock samples or to characterize extracted organic materials. Using T1-T2 correlation data, organic components present in shales, such as kerogen and bitumen, can be examined in laboratory relaxometry measurements. In addition, implementation of a solid-echo pulse sequence to refocus T2 relaxation caused by homonuclear dipolar coupling during correlation measurements allows for improved resolution of solid-phase protons. LF-NMR measurements of T1 and T2 relaxation time distributions were carried out on raw oil shale samples from the Eocene Green River Formation and pyrolyzed samples of these shales processed by hydrous pyrolysis and techniques meant to mimic surface and in-situ retorting. Samples processed using the In Situ Simulator approach ranged from bitumen and early oil generation through to depletion of petroleum generating potential. The standard T1-T2 correlation plots revealed distinct peaks representative of solid- and liquid-like organic phases; results on the pyrolyzed shales reflect changes that occurred during thermal processing. The solid-echo T1 and T2 measurements were used to improve assessment of the solid organic phases, specifically

  17. Growth of aluminum nitride bulk crystals by sublimation

    Science.gov (United States)

    Liu, Bei

    The commercial potential of III-nitride semiconductors is already being realized by the appearance of high efficiency, high reliability, blue and green LEDS around the world. However, the lack of a native nitride substrate has hindered the full-realization of more demanding III-nitride devices. To date, single aluminum nitride (AlN) crystals are not commercially available. New process investigation is required to scale up the crystal size. New crucibles stable up to very high temperatures (˜2500°C) are needed which do not incorporate impurities into the growing crystals. In this thesis, the recent progresses in bulk AlN crystal growth by sublimation-recondensation were reviewed first. The important physical, optical and electrical properties as well as chemical and thermal stabilities of AlN were discussed. The development of different types of growth procedures including self-seeding, substrate employed and a new "sandwich" technique were covered in detail. Next, the surface morphology and composition at the initial stages of AlN grown on 6H-SiC (0001) were investigated. Discontinuous AlN coverage occurred after 15 minutes of growth. The initial discontinuous nucleation of AlN and different lateral growth of nuclei indicated discontinuous AIN direct growth on on-axis 6H-SiC substrates. At the temperature in excess of 2100°C, the durability of the furnace fixture materials (crucibles, retorts, etc.) remains a critical problem. The thermal and chemical properties and performance of several refractory materials, including tantalum carbide, niobium carbide, tungsten, graphite, and hot-pressed boron nitride (HPBN), in inert gas, as well as under AIN crystal growth conditions were discussed. TaC and NbC are the most stable crucible materials in the crystal growth system. HPBN crucible is more suitable for AlN self-seeding growth, as crystals tend to nucleate in thin colorless platelets with low dislocation density. Finally, clear and colorless thin platelet Al

  18. Method for Removing Mixed Noises of Color Image Based on CB Model%基于CB模型的彩色图像混合噪声去除方法

    Institute of Scientific and Technical Information of China (English)

    周千; 李文胜

    2016-01-01

    将分数阶偏微分理论和CB模型相结合应用于图像去噪,提出了一种基于分数阶偏微分方程和CB模型的彩色图像混合噪声去除方法。对于添加混合噪声(高斯噪声和椒盐噪声)的彩色图像,首先,利用MCM模型去除图像中的椒盐噪声,然后将处理后的彩色图像分解为色度C和亮度B两部分,用分数阶偏微分模型处理亮度B,而对于色度C,由于其受到单位长度的限制,在处理时非常困难,利用拉格朗日乘数法并通过添加辅助变量,将色度转化为两个近似的子问题,从而得到色度的近似处理方法,最后将处理后的亮度B和色度C合成为新的彩色图像。最后通过实验证明了该方法的有效性。%Combining fractional-order differential theory with Chromaticity-Brightness(CB)model in order to deal with the mixture of the salt&pepper and Gaussian noises,a novel color image denoising model is proposed,which is based on fractional-order partial differential equation and CB model. For a color image with mixed noises(salt &pepper and Gaussian noises),the salt & pepper noise can be eliminated by the MCM model effectively. Then ,the processed color image is decomposed into chromaticity component and brightness component. Secondly ,we use fractional-order differential model for brightness component. For chromaticity component ,we use Lagrange multiplier method and add an auxiliary variable to approximate the chromaticity. Thirdly ,the retorted image is got by multiplying the recovered chromaticity with recovered brightness. Finally,we prove the validity of the proposed model through the experiments.

  19. Below a Historic Mercury Mine: Non-linear Patterns of Mercury Bioaccumulation in Aquatic Organisms

    Science.gov (United States)

    Haas, J.; Ichikawa, G.; Ode, P.; Salsbery, D.; Abel, J.

    2001-12-01

    Unlike most heavy metals, mercury is capable of bioaccumulating in aquatic food-chains, primarily because it is methylated by bacteria in sediment to the more toxic methylmercury form. Mercury concentrations in a number of riparian systems in California are highly elevated as a result of historic mining activities. These activities included both the mining of cinnabar in the coastal ranges to recover elemental mercury and the use of elemental mercury in the gold fields of the Sierra Nevada Mountains. The most productive mercury mining area was the New Almaden District, now a county park, located in the Guadalupe River drainage of Santa Clara County, where cinnabar was mined and retorted for over 100 years. As a consequence, riparian systems in several subwatersheds of the Guadalupe River drainage are contaminated with total mercury concentrations that exceed state hazardous waste criteria. Mercury concentrations in fish tissue frequently exceed human health guidelines. However, the potential ecological effects of these elevated mercury concentrations have not been thoroughly evaluated. One difficulty is in extrapolating sediment concentrations to fish tissue concentrations without accounting for physical and biological processes that determine bioaccumulation patterns. Many processes, such as methylation and demethylation of mercury by bacteria, assimilation efficiency in invertebrates, and metabolic rates in fish, are nonlinear, a factor that often confounds attempts to evaluate the effects of mercury contamination on aquatic food webs. Sediment, benthic macroinvertebrate, and fish tissue samples were collected in 1998 from the Guadalupe River drainage in Santa Clara County at 13 sites upstream and downstream from the historic mining district. Sediment and macroinvertebrate samples were analyzed for total mercury and methylmercury. Fish samples were analyzed for total mercury as whole bodies, composited by species and size. While linear correlations of sediment

  20. Mineralogical Characterization and Gravity Separation of Huadian Oil Shale%桦甸油页岩的矿物学特征及重力分选富集

    Institute of Scientific and Technical Information of China (English)

    张志军; 李亚南; 杨小霞; 贾红伟

    2016-01-01

    为了实现油页岩中油母质的分选富集,采用浮沉试验将桦甸油页岩原矿分成不同的密度级别,并借助 XRD、XRF、SEM-EDS 和光学显微镜分析手段分析了原矿及各密度级别样品的化学组成和矿物学特征。结果表明,桦甸油页岩中的无机矿物主要包含石英、高岭石、蒙脱石、白云母、方解石和白云石。对于不同密度级别的油页岩样品,其密度越高,灰分越高,在低密度级别的油页岩中存在较高含量的油母质。采用重介质旋流器的重力分选方法可将高密度贫油母质部分抛除,得到含油率较高的富油母质产品,实现了油母质的分选富集。分选后的富油母质产品可用于干馏制油,贫油母质产品可用于发电或暂时封存。%The float and sink tests were carried out to separate the raw Huadian oil shale into a series of fractions according to density.The mineralogical characterization of the oil shale and its fractions was performed by using the analytical methods of XRF,XRD,SEM-EDS and optical microscopy.The inorganic minerals of oil shale were mainly quartz,kaolinite,montmorillonite, muscovite,calcite and dolomite.The ash content of oil shale with different density fractions increased with the increase of density fraction.There was high content of kerogen in low density fraction of Huadian oil shale,and kerogen beneficiation from raw oil shale could be realized by using gravity separation method.After the separation of raw oil shale with dense medium cyclone,the rich kerogen products can be used for retorting to increase oil yield,and the poor kerogen products can be used for power generation or temporarily sealed.

  1. 巴戟天提取物对大鼠类风湿性关节炎作用的观察%Observation of the effect of Morinda offcinalis How on rat rheumatoid arthritis

    Institute of Scientific and Technical Information of China (English)

    陈岚; 陈翠; 高毅; 任海祥

    2011-01-01

    目的 研究巴戟天提取物对大鼠类风湿性关节炎的抗炎作用.方法 采用完全Freund's佐剂诱导大鼠类风湿性关节炎和0.6%冰醋酸致小鼠疼痛扭体模型,分别以大鼠足踝关节周径、炎症介质PGE2含量,小鼠扭体次数为指标,观察巴戟天提取物对实验性类风湿性关节炎的作用.结果 巴戟天提取物中剂量、高剂量对完全Freund's佐剂所致的大鼠足肿胀有明显抑制作用,能降低PGE2的含量(P<0.05,P<0.01);减少冰醋酸所致的小鼠扭体次数(P<0.01).结论 巴戟天提取物具有一定的抗类风湿性关节炎作用,其抗炎镇痛作用和降低炎症介质PGE2含量密切相关.%Objective To study effects of extract from Morinda offcinalis How on the rheumatoid arthritis. Methods AA in rats was induced by Freund's complete adjuvant. Mice retortion pain model is induced by 0.6% glacial acetic acid. The diameter of ankle joint, mediators of inflammation PGE2 and the writhing frequency are effect index. Researched effects of extract from Morincla offcinalis How on the rheumatoid arthritis.Results The extract from Morinda offcinalis How medium dose and high dose both significant inhibited the ankle swelling of AA in rats and decreased the PGE2 ( P < O. 05 ,P < O. 01 ), they also reduced the writhing frequency of mice induced by glacial acetic acid ( P < O. O1 ). Conclusion Mofinda effcinalis How extracts has therapeutic effects on rheumatoid arthritis, which mechanism is related to its effects on reducing the mediators of inflammation PGF2, anti-inflammatory and analgesia.

  2. Challenges and barriers faced by women in accessing justice against obstetric violence

    Directory of Open Access Journals (Sweden)

    Chandramathi Majety

    2016-09-01

    Full Text Available The progress of any nation exclusively depends on the societal status of women. Just about one half of the global population comprise of women. Women have always been sufferers of abuse by male dominated society. Men require being oriented about their sense of duty towards women and women wishes to be empowered. The position remains the same everywhere. In a country like India woman is worshipped as goddess and on the other hand she is being subjected to oppression, suppression, exploitation and ill-treated by the male dominated society. The United Nations report states that and ldquo;woman constitutes half of the world population, perform nearly 2/3 of works hours, receive one tenth of the world's income and own less than one-hundredth percent of the world's property. and rdquo; There are many probable retort to the problem of violence against women and a range of legal doctrines in which violent behavior come into sight as an issue. A wholesome legal response to crime against women might require a significantly restructured legal framework with a new approach solely for the rationale of dealing with violence against women in all its forms. and ldquo;Obstetric violence and rdquo; refers to acts categorized as physically or psychologically violent in the process of child birth. Obstetric care submits to the most basic maternal care. It deals itself with the concern of a woman during pregnancy, childbirth and the post-partum blues. This also involves providing information regarding the pregnancy, child birth and post-partum blues. Indian Public Health Standards guides and lsquo;emergency obstetric care' as an essential service at every government health care center. Most of the findings have decorated the situation of obstetric care in the government health facilities to be of very poor quality and the major concern of maternal mortality. Legal intervention must ensure women's reproductive rights for better implementation and monitoring of

  3. Chapter 3: Geologic Assessment of Undiscovered Oil and Gas Resources in the Phosphoria Total Petroleum System of the Wind River Basin Province, Wyoming

    Science.gov (United States)

    Kirschbaum, M.A.; Lillis, P.G.; Roberts, L.N.R.

    2007-01-01

    The Phosphoria Total Petroleum System (TPS) encompasses the entire Wind River Basin Province, an area of 4.7 million acres in central Wyoming. The source rocks most likely are black, organic-rich shales of the Meade Peak and Retort Phosphatic Shale Members of the Permian Phosphoria Formation located in the Wyoming and Idaho thrust belt to the west and southwest of the province. Petroleum was generated and expelled during Jurassic and Cretaceous time in westernmost Wyoming and is interpreted to have migrated into the province through carrier beds of the Pennsylvanian Tensleep Sandstone where it was preserved in hypothesized regional stratigraphic traps in the Tensleep and Permian Park City Formation. Secondary migration occurred during the development of structural traps associated with the Laramide orogeny. The main reservoirs are in the Tensleep Sandstone and Park City Formation and minor reservoirs are in the Mississippian Madison Limestone, Mississippian-Pennsylvanian Amsden Formation, Triassic Chugwater Group, and Jurassic Nugget Sandstone and Sundance Formation. The traps are sealed by shale or evaporite beds of the Park City, Amsden, and Triassic Dinwoody Formations, Triassic Chugwater Group, and Jurassic Gypsum Spring Formation. A single conventional oil and gas assessment unit (AU), the Tensleep-Park City AU, was defined for the Phosphoria TPS. Both the AU and TPS cover the entire Wind River Basin Province. Oil is produced from 18 anticlinal fields, the last of which was discovered in 1957, and the possibility of discovering new structural oil accumulations is considered to be relatively low. Nonassociated gas is produced from only two fields, but may be underexplored in the province. The discovery of new gas is more promising, but will be from deep structures. The bulk of new oil and gas accumulations is dependent on the discovery of hypothesized stratigraphic traps in isolated carbonate reservoirs of the Park City Formation. Mean resource estimates for

  4. Study on Dynamic Characteristic of Planetary Reducer with High Power and High Speed%大功率高速行星齿轮减速器动态特性计算研究

    Institute of Scientific and Technical Information of China (English)

    尤明明

    2011-01-01

    针对某NGW型大功率高速行星齿轮减速器,采用集中质量法将减速器各运动构件简化为集中质量,各个构件之间以及构件与机架之间的连接简化为弹性元件,整个系统简化为一个弹簧质量系统.建模中考虑了齿轮类构件、行星架组件的质心沿横向和纵向的振动位移以及构件由于扭转振动产生的角位移,最终建立了系统的扭转一横向振动耦合模型.通过求解动力学微分方程组,获取表征系统动态特性的系统各阶固有频率及其对应的各共振转速,根据设计输入转速,验证了此减速器各结构参数设计的合理性.%Aiming at a certain NGW planetary reducer with high power and high speed, the method of convergence mass is adopted to simplify the parts of reducer as convergence mass, the connection of each part,parts and rack is simplified to elastic part, and the total system is simplified to a spring - mass system.In the modeling process, the mass center of gear and planet carrier component vibration displacement along lateral orientation and longitudinal orientation is considered, and the retortion- lateral vibration coupling model is built.Through solving dynamic differential equations, the each order inherence frequency and corresponding each resonance speed which representing the system dynamics characteristic is obtained.According to the design rotating speed, the rationality of reducer each structure parameter is verified.

  5. Concentration, distribution, and translocation of mercury and methylmercury in mine-waste, sediment, soil, water, and fish collected near the Abbadia San Salvatore mercury mine, Monte Amiata district, Italy

    Science.gov (United States)

    Rimondi, V.; Gray, J.E.; Costagliola, P.; Vaselli, O.; Lattanzi, P.

    2012-01-01

    The distribution and translocation of mercury (Hg) was studied in the Paglia River ecosystem, located downstream from the inactive Abbadia San Salvatore mine (ASSM). The ASSM is part of the Monte Amiata Hg district, Southern Tuscany, Italy, which was one of the world’s largest Hg districts. Concentrations of Hg and methyl-Hg were determined in mine-waste calcine (retorted ore), sediment, water, soil, and freshwater fish collected from the ASSM and the downstream Paglia River. Concentrations of Hg in calcine samples ranged from 25 to 1500 μg/g, all of which exceeded the industrial soil contamination level for Hg of 5 μg/g used in Italy. Stream and lake sediment samples collected downstream from the ASSM ranged in Hg concentration from 0.26 to 15 μg/g, of which more than 50% exceeded the probable effect concentration for Hg of 1.06 μg/g, the concentration above which harmful effects are likely to be observed in sediment-dwelling organisms. Stream and lake sediment methyl-Hg concentrations showed a significant correlation with TOC indicating considerable methylation and potential bioavailability of Hg. Stream water contained Hg as high as 1400 ng/L, but only one water sample exceeded the 1000 ng/L drinking water Hg standard used in Italy. Concentrations of Hg were elevated in freshwater fish muscle samples and ranged from 0.16 to 1.2 μg/g (wet weight), averaged 0.84 μg/g, and 96% of these exceeded the 0.3 μg/g (methyl-Hg, wet weight) USEPA fish muscle standard recommended to protect human health. Analysis of fish muscle for methyl-Hg confirmed that > 90% of the Hg in these fish is methyl-Hg. Such highly elevated Hg concentrations in fish indicated active methylation, significant bioavailability, and uptake of Hg by fish in the Paglia River ecosystem. Methyl-Hg is highly toxic and the high Hg concentrations in these fish represent a potential pathway of Hg to the human food chain.

  6. Assaying J. L. Mackie\\\\\\'s View on Evil Based on Suhrewardi\\\\\\'s Philosophy

    Directory of Open Access Journals (Sweden)

    S.Moreza Hosseini Shahroudi

    2014-01-01

    Full Text Available J. L. Mackie is among those philosophers who have highlighted evil as evidence to God's nonexistence. Suhrewardi's ideas of evil can partially answer some of his critiques. There are two kinds of answers to Mackie's objections in Suhrewardi's ideas: 1- direct answers, 2- answers which can be inferred from the general principles of Suhrewardi's philosophy. Of course some of Mackie's critiques cannot be retorted upon Suhrewardi's philosophy.   J. L. Mackie lays out his major objection through the argument that God is omnipotent, he is purely good, evil exists; the latter proposition shall contradict the former two ones if they are true. Following this argument Mackie levels other minor objections too.   The major objection of Mackie can be retorted by basic principles of Suhrewardi's philosophy: human lack of authority in attribution of good and evil a principle which if adopted by one it eventually leads to partial evil's disappearance in universal goodness; acceptance of the rule: "the higher is not concerned with the lower" which disqualifies man of negation of absolute divine attributes after the demonstration of Necessary Being; rational determination of taxonomy of contingent beings according to the good/evil order the result of which is demonstration of pure goodness of God and minor evil's not being in contradiction with pure goodness attribute; acceptance of the maxim that evils are necessary for higher goods which not only makes evils' existence not to challenge divine power and goodness but rather it is indeed the lack of evil that would challenge wisdom.    Having outlined his major critique, Mackie reviews some of the answers offered by the theosophers and then takes them all to task.   The first contradictory solution discussed by Mackie reads "good cannot exist without evil, or stated otherwise, evil is necessarily associated with good". Mackie levels some critiques against this solution. Among others one of these critiques is

  7. Influence of cooling rate on food quality after high-temperature sterilization%高温杀菌冷却速率对食品品质的影响研究

    Institute of Scientific and Technical Information of China (English)

    张路遥; 姜启兴; 许艳顺; 夏文水

    2013-01-01

    研究食品经高温杀菌后冷却速度对其品质的影响.根据罐头食品杀菌快速冷却的优势理论,应用数值计算方法分析温度场分布及蒸煮强度的变化,采用冰水淋水式反压快速方法,测定其冷却速率的变化及冷却过程中过余热强度对其品质的影响,通过食品质构分析和用电泳测定渗出液中可溶性胶原蛋白的组成变化,并与常温冷却对食品冷却时间和品质影响进行比较,结果表明:食品尺寸大小影响冷却时热穿透时间和冷却效果;对于包装鱼头食品的杀菌,与反压常温水冷却方式相比,冰水淋水式反压冷却时间缩短45.1%,蒸煮强度降低8.5%,鱼肉硬度弹性分别提高12.7%和6.5%,食品渗出液中可溶性胶原蛋白有一定减少.结果表明,冰水淋水式反压冷却对于大尺寸包装高温杀菌食品的品质有一定提高.研究结果对于大尺寸包装的高温杀菌食品具有指导意义和应用价值.%The influence of cooling rate on food quality after sterilizing was explored.According to the advantage theory of quick cooling applied on canned foods,numerical method was applied to calculate temperature distribution and the change of C value.Using pressurized cooling with ice water after sterilization,the cooling rate and the excessive foods quality damage of heat treatment were evaluated by analyzing the food texture properties as well as testing the change of soluble collagen in exudates,which was compared with that of products using pressurized cooling with water at room temperature.Results showed that foods size influences heat penetration time and the cooling effect.By applying quick cooling on bighead carp packed in retort pouches,cooling time was shortened by 45.1%,and C value was reduced by 8.5%,and hardness and springiness of fish muscle were increased by 12.7% and 6.5%,respectively,in addition,soluble collagen in exudates was slightly reduced.The research suggested that

  8. Mercury recycling in the United States in 2000

    Science.gov (United States)

    Brooks, William E.; Matos, Grecia R.

    2005-01-01

    Reclamation and recycling of mercury from used mercury- containing products and treatment of byproduct mercury from gold mining is vital to the continued, though declining, use of this metal. Mercury is reclaimed from mercury-containing waste by treatment in multistep high-temperature retorts-the mercury is volatized and then condensed for purification and sale. Some mercury-containing waste, however, may be landfilled, and landfilled material represents loss of a recyclable resource and a threat to the environment. Related issues include mercury disposal and waste management, toxicity and human health, and regulation of mercury releases in the environment. End-users of mercury-containing products may face fines and prosecution if these products are improperly recycled or not recycled. Local and State environmental regulations require adherence to the Resource Conservation and Recovery Act and the Comprehensive Environmental Response, Compensation, and Liability Act to regulate generation, treatment, and disposal of mercury-containing products. In the United States, several large companies and a number of smaller companies collect these products from a variety of sources and then reclaim and recycle the mercury. Because mercury has not been mined as a principal product in the United States since 1992, mercury reclamation from fabricated products has become the main source of mercury. Principal product mercury and byproduct mercury from mining operations are considered to be primary materials. Mercury may also be obtained as a byproduct from domestic or foreign gold-processing operations. In the early 1990s, U.S. manufacturers used an annual average that ranged from 500 to 600 metric tons of recycled and imported mercury for fabrication of automobile convenience switches, dental amalgam, fluorescent lamps, medical uses and thermometers, and thermostats. The amount now used for fabrication is estimated to be 200 metric tons per year or less. Much of the data on

  9. Powdered microporous glasses: changing porosity through aging Pós de vidros microporosos: variação de porosidade via envelhecimento

    Directory of Open Access Journals (Sweden)

    Carlos Renato Perruso

    1998-10-01

    Full Text Available Recently, we have reported the production of a microporous high purity silica powder from the acid leaching of glasses with average pore size around 2.5nm and specific surface area of 420m2/g (BET. The employed glasses derived from the melting of two types of waste from the industrial processing of Brazilian oil shale (retorted oil shale and the top fraction of the intermediate layer of Irati Formation. Depending on the proportion of the two wastes employed in the formulation of the glasses, either a silica gel or a powdered one is obtained, after leaching. The acid leaching of those glasses with hydrochloric acid, at 90 °C, was used to produce powdered microporous silica. In the present work it is studied the effect of aging time and temperature on the morphology and structure of the obtained powdered silica. Aging studies were performed in two different media, an acidic (hydrochloric acid and a basic one (ammonium hydroxide for different periods of time and temperatures. XRD, SEM/EDX, TEM, specific surface area measurements and DTA/TGA were used to characterize these materials. The results have shown a decrease of specific surface area with increasing time and temperature. Apparently, this behavior may be associated with dissolution and re-precipitation mechanisms.Recentemente apresentamos a produção de pós microporosos de sílica de alta pureza a partir de lixiviação ácida de vidros, com tamanho médio de poros próximo de 2,5 nm e 420 m2/g (BET de área de superfície específica. Foram usados vidros a partir de fusão de dois tipos de resíduos de processamento industrial de xisto oleígeno brasileiro (xisto oleígeno retortado e fração superior da camada intermediária da formação de Irati. Dependendo da proporção dos dois resíduos empregados na formulação dos vidros, é obtida sílica na forma de gel ou de pó, após lixiviação. A lixiviação desses vidros com ácido clorídrico a 90 oC foi usada para produzir s

  10. Corrosión por depósitos salinos de los aceros SA213-T22 y SA213-TP347H en presencia de una mezcla 80%V2O5-20%Na2SO4-20%Na2SO4

    Directory of Open Access Journals (Sweden)

    Romero, M. A.

    1998-02-01

    Full Text Available Many hot corrosion problems in industrial and utility boilers are caused by molten salts. The corrosion processes which occur in salts are of an electrochemical nature, and so they can be studied using electrochemical test methods. In this research, electrochemical techniques in molten salt systems have been used for the measurements of molten corrosion processes. Electrochemical test methods are described here for a salt mixture of 80%V2O5-20%Na2SO4 at 540-680°C. To establish better the electrochemical corrosion rate mearurements for molten salt systems, information from electrochemical potentiodynamic polarization curves, such as polarization resistance and Tafel slopes were used in this study to generate corrosion rate data. The salt was contained in a quartz crucible inside a stainless steel retort. The atmosphere used was air. A thermocouple sheathed with quartz glass was introduced into the molten salt for temperature monitoring and control. Two materials were tested in the molten mixture: SA213-T22 and SA213-TP347H steels. The corrosion rates values obtained using electrochemical methods were around 0.58-7.14 mm/yr (22.9-281 mpy. The corrosion rate increase with time.Muchos problemas de corrosión por depósitos salinos en la industria eléctrica, especialmente en los generadores de vapor, se deben al ataque por sales fundidas. El proceso de corrosión en sales fundidas es de naturaleza electroquímica; así, puede estudiarse empleando técnicas electroquímicas. Este proceso de corrosión en un sistema de sales fundidas, mezcla de 80%V2O5 y 20%Na2SO4 a temperaturas comprendidas entre 540 y 680°C, se evaluó en esta investigación por medio de técnicas electroquímicas. Para medir la velocidad de corrosión por depósitos salinos se parte de curvas de polarización potenciodinámicas determinando la resistencia de polarización por extrapolación de las pendientes de Tafel. Las sales se fundieron en un crisol de cuarzo dentro de un

  11. Oil Shale and Its Relation to Petroleum and Other Fuels (Summary Les schistes à l'huile et leurs relation avec le pétrole et les autres combustibles (résumé

    Directory of Open Access Journals (Sweden)

    Billo S. M.

    2006-10-01

    Full Text Available World oil reserves in oil shales (1. 2 to 2 trillion barrels are at least 4 times as large as proven crude oil petroleum reserves (310 billion barrels. Petroleum is produced from oil shale by pyrolysis (destructive distillation by hecit. Coal can also be converted ta synthetic petroleum products by direct hydrogenation and by the modified Fischer-Tropsch process. Rising cost of oil exploration and production and increasing efficiency of synthetizing processes indicate that synthetic fuels may increase the supply of natural liquid fuels in the foreseeable future. The term kerogen is often used to comprise all the organic matter contained in sediments and may be of two kinds: 1 coalylike kerogen, and 2 sapropellic kerogen - oil shale type. It is believed that both kerogen and petroleum were formed from hypothetical ancestor - protopetroleum. They are found together in sedimenfs and their C13C12 ratios are similar. The largest producer of oil shale ore China, the USSR and Sweden. The USA is technologically prepared to begin production of synthetized fuels through varying economic condition. Richness and size of deposits, cost of mining, cost of retorting, character of products, and location of deposit in relation to plant and market, determine the economic value of a given deposit. Les réserves mondiales de schistes à huile (1,2 à 2 x 10. 12 barils sont au moins quatre fois supérieures aux réserves prouvées de pétrole brut (310 x 10. 9 barils. On extrait le pétrole des schistes par pyrolyse (distillation destructive thermique. Le charbon peut aussi être transformé en hydrocarbures par hydrogénation et par le procédé Fischer-Tropsch modifié. L'augmentation des coûts de l'exploration et de la production du pétrole et amélioration de l'efficacité des procédés synthétiques montrent que les produits synthétiques vont jouer un rôle croissant dans l'approvisionnement en combustibles liquides au cours des années à venir. Le terme k

  12. A Spouted Bed Reactor Monitoring System for Particulate Nuclear Fuel

    Energy Technology Data Exchange (ETDEWEB)

    D. S. Wendt; R. L. Bewley; W. E. Windes

    2007-06-01

    Conversion and coating of particle nuclear fuel is performed in spouted (fluidized) bed reactors. The reactor must be capable of operating at temperatures up to 2000°C in inert, flammable, and coating gas environments. The spouted bed reactor geometry is defined by a graphite retort with a 2.5 inch inside diameter, conical section with a 60° included angle, and a 4 mm gas inlet orifice diameter through which particles are removed from the reactor at the completion of each run. The particles may range from 200 µm to 2 mm in diameter. Maintaining optimal gas flow rates slightly above the minimum spouting velocity throughout the duration of each run is complicated by the variation of particle size and density as conversion and/or coating reactions proceed in addition to gas composition and temperature variations. In order to achieve uniform particle coating, prevent agglomeration of the particle bed, and monitor the reaction progress, a spouted bed monitoring system was developed. The monitoring system includes a high-sensitivity, low-response time differential pressure transducer paired with a signal processing, data acquisition, and process control unit which allows for real-time monitoring and control of the spouted bed reactor. The pressure transducer is mounted upstream of the spouted bed reactor gas inlet. The gas flow into the reactor induces motion of the particles in the bed and prevents the particles from draining from the reactor due to gravitational forces. Pressure fluctuations in the gas inlet stream are generated as the particles in the bed interact with the entering gas stream. The pressure fluctuations are produced by bulk movement of the bed, generation and movement of gas bubbles through the bed, and the individual motion of particles and particle subsets in the bed. The pressure fluctuations propagate upstream to the pressure transducer where they can be monitored. Pressure fluctuation, mean differential pressure, gas flow rate, reactor

  13. Depositional environment and source rock potential of Cenomanian and Turonian sedimentary rocks of the Tarfaya Basin, Southwest Morocco

    Energy Technology Data Exchange (ETDEWEB)

    Ghassal, B.I.; Littke, R.; Sachse, V.; Sindern, S.; Schwarzbauer, J.

    2016-07-01

    from bituminite-fair to bituminite-rich and to higher percentages of visible organic matter towards the younger interval. These differences in the organic matter type are attributed to i) early diagenetic kerogen sulfurization and ii) the upwelling depositional environment. Moreover, kerogen sulfurization was controlled by the relationship between carbonate, iron and sulfur as well as the organic matter. Thus, the organic carbon-rich deposits can be grouped into: i) low Sorg and moderately organic matter-rich oil prone source rocks, ii) moderate Sorg and organic-carbon-rich oil prone source rocks, iii) high Sorg and organic carbon-rich oil prone source rocks and iv) very high Sorg and organic carbon-rich oil prone source rocks, the latter representing the CTBE interval. Types 2 to 4 will generate sulfur-rich petroleum upon maturation or artificial oil shale retorting. This integrated organic and inorganic approach sheds light on the various processes leading to the development of the world-class oil shales deposited through the Cenomanian to Turonian. In addition, this study shows how the changes in the depositional environment might have controlled kerogen sulfurization and organic matter preservation and structure. This detailed approach provides a better understanding on source rock development during the Cenomanian to Turonian in a global context, as many of the geochemical features were identified worldwide for deposits related to OAE2. (Author)

  14. Zone Freezing Study for Pyrochemical Process Waste Minimization

    Energy Technology Data Exchange (ETDEWEB)

    Ammon Williams

    2012-05-01

    Pyroprocessing technology is a non-aqueous separation process for treatment of used nuclear fuel. At the heart of pyroprocessing lies the electrorefiner, which electrochemically dissolves uranium from the used fuel at the anode and deposits it onto a cathode. During this operation, sodium, transuranics, and fission product chlorides accumulate in the electrolyte salt (LiCl-KCl). These contaminates change the characteristics of the salt overtime and as a result, large volumes of contaminated salt are being removed, reprocessed and stored as radioactive waste. To reduce the storage volumes and improve recycling process for cost minimization, a salt purification method called zone freezing has been proposed at Korea Atomic Energy Research Institute (KAERI). Zone freezing is melt crystallization process similar to the vertical Bridgeman method. In this process, the eutectic salt is slowly cooled axially from top to bottom. As solidification occurs, the fission products are rejected from the solid interface and forced into the liquid phase. The resulting product is a grown crystal with the bulk of the fission products near the bottom of the salt ingot, where they can be easily be sectioned and removed. Despite successful feasibility report from KAERI on this process, there were many unexplored parameters to help understanding and improving its operational routines. Thus, this becomes the main motivation of this proposed study. The majority of this work has been focused on the CsCl-LiCl-KCl ternary salt. CeCl3-LiCl-KCl was also investigated to check whether or not this process is feasible for the trivalent species—surrogate for rare-earths and transuranics. For the main part of the work, several parameters were varied, they are: (1) the retort advancement rate—1.8, 3.2, and 5.0 mm/hr, (2) the crucible lid configurations—lid versus no-lid, (3) the amount or size of mixture—50 and 400 g, (4) the composition of CsCl in the salt—1, 3, and 5 wt%, and (5) the

  15. Distribution, speciation, and transport of mercury in stream-sediment, stream-water, and fish collected near abandoned mercury mines in southwestern Alaska, USA

    Science.gov (United States)

    Gray, J.E.; Theodorakos, P.M.; Bailey, E.A.; Turner, R.R.

    2000-01-01

    Concentrations of total Hg, Hg (II), and methylmercury were measured in stream-sediment, stream-water, and fish collected downstream from abandoned mercury mines in south-western Alaska to evaluate environmental effects to surrounding ecosystems. These mines are found in a broad belt covering several tens of thousands of square kilometers, primarily in the Kuskokwim River basin. Mercury ore is dominantly cinnabar (HgS), but elemental mercury (Hg(o)) is present in ore at one mine and near retorts and in streams at several mine sites. Approximately 1400 t of mercury have been produced from the region, which is approximately 99% of all mercury produced from Alaska. These mines are not presently operating because of low prices and low demand for mercury. Stream-sediment samples collected downstream from the mines contain as much as 5500 ??g/g Hg. Such high Hg concentrations are related to the abundance of cinnabar, which is highly resistant to physical and chemical weathering, and is visible in streams below mine sites. Although total Hg concentrations in the stream-sediment samples collected near mines are high, Hg speciation data indicate that concentrations of Hg (II) are generally less than 5%, and methylmercury concentrations are less than 1% of the total Hg. Stream waters below the mines are neutral to slightly alkaline (pH 6.8-8.4), which is a result of the insolubility of cinnabar and the lack of acid- generating minerals such as pyrite in the deposits. Unfiltered stream-water samples collected below the mines generally contain 500-2500 ng/l Hg; whereas, corresponding stream-water samples filtered through a 0.45-??m membrane contain less than 50 ng/l Hg. These stream-water results indicate that most of the Hg transported downstream from the mines is as finely- suspended material rather than dissolved Hg. Mercury speciation data show that concentrations of Hg (II) and methylmercury in stream-water samples are typically less than 22 ng/l, and generally less than

  16. Entrepreneurship and Suburbanism:A Case of Pearl River Delta, China%创业精神与郊区转型--以珠三角为例

    Institute of Scientific and Technical Information of China (English)

    李志刚

    2015-01-01

    This study examines recent transformation of the suburbia in Pearl River Delta, China. With the perspective of territorialization, it asserts that there are three types of sociospatial reconifguration, namely, assimilation, integration, and adaptation, such that it highlights the complexity of suburbia transformation in post-reform China. With several typical cases such as the south suburb of Guangzhou, Luogang New City, and transitional suburban villages, I interrogate a diverse landscape in terms of the transformation of China’s suburbia. Moreover, I argue that the suburbanization of China is attributed to the rise of entrepreneurship, so that suburban communities or authorities retort to such efforts as local entrepreneurialism, entrepreneurial state, and resourcemining feature by bricolage, so to take the risk ofmarket, creation, as well as (re)territorialization. Positively, entrepreneurship provides a signiifcant basis for the recent rise of suburbia in Pearl River Delta, which brings about a number ofmodels including both top-down and bottom-up struggles. As such, we highlight the signiifcance of entrepreneurship and its relation with (re) territorialization, particularly to and for such regions as developing economy, transitional economy, etc.%本文从“领域化”的视角入手,以珠三角为例,解析转型期中国的郊区化及其社会空间重构机制,提出郊区社会空间转型的三种状态:同化、融合、适应,展现出乡城转型进程的复杂性与可能性。珠三角郊区的典型空间案例就是这样一个复杂、多元、差异化的转型机制。在此基础上,本文对中国郊区转型的本质进行解析,强调创业精神的兴起是其内在基础,并将创业精神界定为兼具创业、奋斗与企业家气质的个人或群体精神,以活力、创新和担当风险为特征,强调其正面意义。同时,“领域化”进程与创业精神的兴起存在辩证互动关系,郊区

  17. HPLC FOR CONTROL STABILITY OF QUERCETIN INJECTABLE DOSAGE FORM

    Directory of Open Access Journals (Sweden)

    Martynov AV

    2016-12-01

    retention time and spectral relations in the UV region from the database of DB-2003 spectrums. HPLC analysis results show that the quercetin is stable in ampouled form under autoclave and storage and freshly diluted quercetin concentrate for infusion are identical. Quercetin aqueous solution which was stored at room temperature for 14 days in the light, turned out to be unstable. It was found that aqueous solutions of polysorbate-80 was full hydrolyzed to the initial compounds. Conclusions In this work the ability of quercetin’s perspective concentrates to be stable were checked. The stability of concentrates was determined by HPLC chromatograph "Millichrome A - 02» (SiChrom, Knauer. It is shown that the HPLC methods can be used to establish the smallest difference in the samples. The quercetin’s non-aqueous concentrate is capable of withstanding retorting and remains in standard indestructible state in nonaqueous media (glycerol, ethanol, polysorbate 80. Quercetin is unstable in aqueous solutions and are destroyed during prolonged storage. HPLC- chromatogram is presented in the article and show that gradient HPLC with UV- detection can be used for quality control of quercetin.

  18. Influência dos resíduos da mineração do xisto no crescimento e no teor foliar de Cd, Co e Cr em plantas de aveia preta Influence of residues from oil shale mining on growth and concentration of Cd, Co and Cr in Avena strigosa Schreber plants

    Directory of Open Access Journals (Sweden)

    Ana Rosa Martins dos Anjos

    1996-04-01

    , in the growth and chemical composition of black oats (Avena Strigosa Schreber, as well as the influence of irrigation with deionized water or nutritive solution. The experiment was installed in a greenhouse. with a completely randomized blocks design in factorial combination 4x2, i. e., four different substracts and two water solutions (deionized water and nutritive solution, with four replications. The substract used were A and B horizon from an Oxisol (Alic Dark Red Latossolo with different mixture proportions of oil shale; S1 100% soil, contral, S2 50% soil + 50% smashed oil shale; S3 50% soil + 50% natural oil shale: S4 50% soil + 50% retorted oil shale. The experiment was undertaken during 47 days. After this period average plant height. weight plant drymatter from the leaves and the chemical composition of the leaves for Cd, Co and Cr were determined. The results obtained indicate that in all the treatments, the concentration Cd and Co were higher than the ones observed in gramineaes originated from regions without contamination. The concentration of Cr observed in the leaves may cause toxicity to plants. Plants irrigated with nutritive solution produced higher plant drymatter. The smashed oil shale contributed to increase plant growth and plant drymatter production.

  19. Effects of smectite on the oil-expulsion efficiency of the Kreyenhagen Shale, San Joaquin Basin, California, based on hydrous-pyrolysis experiments

    Science.gov (United States)

    Lewan, Michael D.; Dolan, Michael P.; Curtis, John B.

    2014-01-01

    illite. As a result, illitization only reaches 35% to 40% at 310°C for 72 hr and remains unchanged to 365°C for 72 hr. Bitumen generation before or during early illitization in these experiments emphasizes the importance of knowing when and to what degree illitization occurs in natural maturation of a smectite-rich source rock to determine its expulsion efficiency. Complete illitization prior to bitumen generation is common for Paleozoic source rocks (e.g., Woodford Shale and Retort Phosphatic Shale Member of the Phosphoria Formation), and expulsion efficiencies can be determined on immature samples by hydrous pyrolysis. Conversely, smectite is more common in Cenozoic source rocks like the Kreyenhagen Shale, and expulsion efficiencies determined by hydrous pyrolysis need to be made on samples that reflect the level of illitization at or near bitumen generation in the subsurface.

  20. 多排螺旋CT肠系膜血管造影诊断急性肠缺血%CT angiography of mesenteric vessels in acute mescuteric ischemia

    Institute of Scientific and Technical Information of China (English)

    强金伟; 李若坤; 冯琴; 冯晓源; 廖治河

    2010-01-01

    Objective To evaluate mesenteric muhidetector row CT angiography (MDCTA) in the diagnosis of acute mesenteric ischemia (AMI).Methods In this study,43 cases of AMI proven by clinical criteria,or operation and pathology underwent whole abdomen MDCT precontrast,arterial phase and venous phase scan with 0.6 mm collimation.The mesenteric arteries and veins were reconstructed by using volume rendering (VR),maximum intensity projection (MIP),thin slab maximum intensity projection (TSMIP) techniques,and abnormal CT angiography findings as well as abnormal bowel and mesentery were analyzed.Results It was found that AMI was caused by superior mesenteric artery (SMA) embolism (n =4),SMA thrombosis (n = 6),mesenteric and portal venous thrombosis (n = 13),SMA dissection (n =5),strangulated bowel obstruction (n = 10) and vasculitis (n = 5).MDCTA showed clearly the position,shape,severity and extent of the vascular occlusion,narrow and dissection.It could also demonstrate the abnormal course and direction of the vessels including vascular gathering,shift,tortuosity,retortion,and twist.Furthermore,the pathogenesis of various conditions including atherosclerotic plaque,emboli,thrombosis,dissection,tumorous invasion,strangulated bowel obstruction and vasculitis could be identified by MDCTA.Conclusion MDCTA can clearly demonstrate direct signs leading to AMI,and identify AMI and its etiology at early stage,with the combination with its indirect findings.%目的 探讨多排螺旋CT肠系膜血管造影(MDCTA)在急性肠缺血(AMI)中的应用价值.方法 对43例经临床或手术、病理证实的AMI患者行全腹MDCT平扫、动脉期和门脉期扫描,准直为0.6mm,采用容积重建(VR)、最大密度投影(MIP)及薄层最大密度投影(TSMIP)技术进行肠系膜动脉和静脉成像,重点观察肠系膜血管的异常表现、肠道和肠系膜异常征象.结果 导致AMI的原因为:肠系膜上动脉(SMA)栓塞4例,SMA血栓形成6例,肠

  1. Lycopene in tomatoes: chemical and physical properties affected by food processing.

    Science.gov (United States)

    Shi, J; Le Maguer, M

    2000-01-01

    Lycopene is the pigment principally responsible for the characteristic deep-red color of ripe tomato fruits and tomato products. It has attracted attention due to its biological and physicochemical properties, especially related to its effects as a natural antioxidant. Although it has no provitamin A activity, lycopene does exhibit a physical quenching rate constant with singlet oxygen almost twice as high as that of beta-carotene. This makes its presence in the diet of considerable interest. Increasing clinical evidence supports the role of lycopene as a micronutrient with important health benefits, because it appears to provide protection against a broad range of epithelial cancers. Tomatoes and related tomato products are the major source of lycopene compounds, and are also considered an important source of carotenoids in the human diet. Undesirable degradation of lycopene not only affects the sensory quality of the final products, but also the health benefit of tomato-based foods for the human body. Lycopene in fresh tomato fruits occurs essentially in the all-trans configuration. The main causes of tomato lycopene degradation during processing are isomerization and oxidation. Isomerization converts all-trans isomers to cis-isomers due to additional energy input and results in an unstable, energy-rich station. Determination of the degree of lycopene isomerization during processing would provide a measure of the potential health benefits of tomato-based foods. Thermal processing (bleaching, retorting, and freezing processes) generally cause some loss of lycopene in tomato-based foods. Heat induces isomerization of the all-trans to cis forms. The cis-isomers increase with temperature and processing time. In general, dehydrated and powdered tomatoes have poor lycopene stability unless carefully processed and promptly placed in a hermetically sealed and inert atmosphere for storage. A significant increase in the cis-isomers with a simultaneous decrease in the all

  2. Perfil de deformação de embalagens em função da variação da pressão efetiva Package deformation profile as a function of the variation in effective pressure

    Directory of Open Access Journals (Sweden)

    Maria Isabel Berto

    2011-12-01

    Full Text Available As embalagens metálicas são amplamente utilizadas em processos de esterilização convencional de alimentos, realizados em autoclaves. Devido ao seu material de construção e principalmente ao design do corpo e tampa contendo ondulações, estas embalagens sofrem variação em seu volume interno durante o processamento térmico. A alteração deste volume interno é função da pressão efetiva, que é a diferença entre a pressão interna e externa da embalagem. O conhecimento do comportamento desta variação de volume, denominado de perfil da deformação da embalagem, é importante para a determinação do adequado espaço livre a ser deixado na etapa de enchimento, e para a verificação da necessidade e dimensionamento de uma contrapressão na autoclave durante o processamento térmico, que garanta a integridade da embalagem e eficiência de troca térmica do processo. Este trabalho constou da determinação do ponto de deformação permanente e do perfil de deformação de cinco tipos de embalagens cilíndricas metálicas comerciais, com volumes de 200, 307, 340, 908 e 2700 mL. Funções polinomiais ajustadas aos dados experimentais da variação do volume em função da pressão efetiva apresentaram altos coeficientes de correlação e valores de desvios padrões residuais abaixo de 10%, indicando que as mesmas podem predizer adequadamente este comportamento.Cans are widely used to sterilize food products in retorts using conventional processing techniques. Their construction material and the design of the rippled body lead to changes in the internal volume during thermal processing. This change in internal volume is due to the effective pressure, which is the difference between the pressures inside and outside the package. Knowledge of this variation in volume with respect to the pressure is important for the correct calculations of the package filling, head space, and to determine an appropriate over pressure to guarantee integrity

  3. Variation of chemical composition of thermal bitumen during Huadian oil shale pyrolysis%桦甸油页岩热解过程中热沥青的组成变化规律

    Institute of Scientific and Technical Information of China (English)

    畅志兵; 初茉; 张超; 白书霞; 林浩

    2016-01-01

    将桦甸油页岩分别在300、350、400、450、500和550℃热解得到半焦,对半焦进行逐级抽提和酸洗,得到自由沥青、碳酸盐束缚沥青和硅酸盐束缚沥青,采用柱层析、FT-IR和GC-MS表征不同沥青的化学组成和结构特征,探讨沥青的化学组成变化及与矿物质的相互作用。结果表明,沥青总产率先增大后减小并在400℃取得最大值4.63%,400-450℃大量沥青分解生成页岩油,使沥青产率降至0.98%。350-450℃自由沥青主要发生羧酸脱羧、酯基分解和长链烷烃裂解反应,使羧酸和酯类化合物含量降低、烷烃碳链长度缩短。干酪根分解生成的羧酸与碳酸盐反应生成羧酸盐,使400℃碳酸盐束缚沥青中羧酸含量达78.82%;含氧化合物可与黏土矿物结合,且烷烃可进入蒙脱石层间,使400℃硅酸盐束缚沥青中含氧化合物和烷烃各占80.79%和19.21%。%The variation of chemical composition of thermal bitumen during Huadian oil shale pyrolysis was studied. Spent shale samples obtained by retorting oil shale at 300-550℃ were subjected to sequential Soxhlet extraction-acid pickling-Soxhlet extraction procedures to obtain free bitumen ( FB ) , bitumen bound with carbonates ( BB-1 ) and bitumen bound with silicates ( BB-2 ) . The bitumen samples were characterized by liquid chromatography fractionation, FT-IR and GC-MS. The results show that the total bitumen yield first increases and then decreases with increasing temperature from 300 to 550℃, and reached the maximum value of 4 . 63% at 400℃. Especially, the intense vaporization and decomposition of bitumen occurring at 400-450 ℃ causes a dramatic decrease in bitumen yield from 4. 63% to 0. 98%. Decarboxylation of aliphatic acids, decomposition of esters and cracking of long-chain alkanes take place at 350-450 ℃, which decreases the contents of acids and esters in FB and shortens the chain length of alkanes. The carboxylic acids derived from kerogen

  4. [What can qualia be? The monistic views].

    Science.gov (United States)

    Livaditis, M

    2012-01-01

    experiments concerning philosophical zombies) in order to demonstrate that qualia are irreducible entities. The main physicalistic options are eliminativism, the theories of identity, functionalism and representationalism. The main argument for phenomenalism is that physical properties and physical knowledge of them, as well, are reducible into and derived from experiences. On the other hand, opponents of phenomenalism retort that our world comprises spatiotemporal parts inaccessible to experience (f.e. the microworld of atomic physics, the world before the appearance of intelligent beings). Yet, some phenomenalists claim that phenomenal properties can be either real (experienced) or potentially real (what one would experience if one could observe this or that spatiotemporal part of the world). According to a third, agnosticistic opinion, named mysterianism, the human mind lacks the capacity of bridging the explanatory gap between physical and phenomenal identities. Many opponents of this theory claim the historically proved ability of human mind to find solutions for difficult problems of our world through scientific knowledge and based on it natural philosophy.

  5. 广州金沙洲城市保障房社区研究*--“日常生活实践”的视角%A Study of Jinshazhou Affordable Housing Community, Guangzhou:the Practice of Everyday Life

    Institute of Scientific and Technical Information of China (English)

    任艳敏; 李志刚

    2013-01-01

    government to promote low-cost labor reproduction. In this context, the new community residents' marginalized status on society, economy and culture has been ‘locked’ and ‘marginalized’. As a response, residents take a variety of‘tactics’ to retort through the practice of everyday life. These ‘tactics’ includes:back to city center, clever transformation, hidden employment, maintain the original social network, positive living. This paper provides a new perspective for affordable housing research and provide scientific reference for the formulation and implementation of related policies.

  6. Simulation and design optimization of temperature distribution of in-situ heating electric heater for oil shale%油页岩原位加热电加热器温度分布模拟及优化设计

    Institute of Scientific and Technical Information of China (English)

    曾桂元; 王存新; 杨浩

    2014-01-01

    Electric heating is one of the ways to in-situ retorting oil shale, and electric heater is the key heating component. Through simulating temperature distribution of electric heater by PDE tool in MATLAB, this paper discusses the effect of heat conductivity coef-ifcient of the heater, heat source density, density, speciifc heat capacity, heater size, etc. on heater effectiveness and uses these parameters as the basis for design optimization of electric heaters. The research ifndings show that the materials with low density is helpful in im-proving heating efifciency of the heater;the heat conductivity coefifcient poses small effect on the temperature;the higher the speciifc heat capacity is, the lower the overall temperature of the heater is;with the increase of heat source density, the temperature of the heater is increased remarkably. Orthogonal experiment shows that heat source density, density and speciifc heat capacity have great effect on heater temperature distribution, while heat conductivity coefifcient has little effect;with the increase of heater radius, the temperature increases accordingly. The heater of design optimization takes the shape of U-tube and vacuum heating tube with axial symmetry, and the materials of heating components are copper and stainless steel, etc. Downhole in-situ electric heating can not only be used for develop-ment of oil shale, but be used as a technique for developing heavy oil.%电加热是原位开采油页岩的方法之一,电加热器是其关键的加热元件。通过MATLAB的PDE工具模拟电加热器的温度分布,探讨了加热器导热系数、热源密度、密度、比热容、加热器尺寸等参数对加热效果的影响,以此作为电加热器优化设计的依据。研究指出,密度小的材料有利于提高加热器的加热效率;导热系数对温度影响不大;比热容越高,加热器的整体温度越低;随热源密度的增加,加热器的温度显著增加;正交实验

  7. Environmental and human exposure assessment monitoring of communities near an abandoned mercury mine in the Philippines: a toxic legacy.

    Science.gov (United States)

    Maramba, Nelia P C; Reyes, Jose Paciano; Francisco-Rivera, Ana Trinidad; Panganiban, Lynn Crisanta R; Dioquino, Carissa; Dando, Nerissa; Timbang, Rene; Akagi, Hirokatsu; Castillo, Ma Teresa; Quitoriano, Carmela; Afuang, Maredith; Matsuyama, Akito; Eguchi, Tomomi; Fuchigami, Youko

    2006-10-01

    Abandoned mines are an important global concern and continue to pose real or potential threats to human safety and health including environmental damage/s. Very few countries had government mine regulation and reclamation policies until the latter part of the century where legal, financial and technical procedures were required for existing mining operations. Major reasons for mine closure may be mainly due to poor economies of the commodity making mining unprofitable, technical difficulties and national security. If the mine is abandoned, more often than not it is the government that shoulders the burden of clean-up, monitoring and remediation. The topic of abandoned mines is complex because of the associated financial and legal liability implications. Abandoned mercury mines have been identified as one of the major concerns because of their significant long-term environmental problems. Primary mercury production is still ongoing in Spain, Kyrgzystan, China, Algeria, Russia and Slovakia while world production declined substantially in the late 1980s. In the Philippines, the mercury mine located southeast of Manila was in operation from 1955 to 1976, before ceasing operation because of the decline in world market price for the commodity. During this time, annual production of mercury was estimated to be about 140,000 kg of mercury yearly. Approximately 2,000,000 t of mine-waste calcines (retorted ore) were produced during mining and roughly 1,000,000 t of these calcines were dumped into nearby Honda Bay to construct a jetty to facilitate mine operations where about 2000 people reside in the nearby three barangays. In October, 1994 the Department of Health received a request from the Provincial Health Office for technical assistance relative to the investigation of increasing complaints of unusual symptoms (e.g. miscarriages, tooth loss, muscle weakness, paralysis, anemia, tremors, etc.) among residents of three barangays. Initial health reports revealed significant

  8. Biologia reprodutiva de Synallaxis albilora (aves: Furnariidae no Pantanal de Poconé, Mato Grosso

    Directory of Open Access Journals (Sweden)

    Tatiana Colombo Rubio

    2008-01-01

    dezembro.Synallaxis albilora (White-lored Spinetail is a Neotropical ovenbird restricted to flooded areas in the Pantanal wetlands, central portion of South America. The aim of this work is to present a detailed description of its breeding biology (nests, eggs and nestlings in the locality of Pirizal, Municipality of Nossa Senhora do Livramento, Pantanal of Poconé, at Mato Grosso State, Brazil. Several other aspects of its natural history are also described such as brood size, incubation period, parental care, nest further use by other species, agonistic interactions and nest-site. In order to study nest site, hemispherical photographs of vegetation above and north of each nest were taken. The photos were analyzed to estimate the canopy openness. The use of this method is considered unpublished in ornithological studies. Sixty nests were found and monitored during the years 2001, 2002, 2005 and 2006. The nest of S. albilora is similar to a retort, being built with pieces of kindling and lined with leaves. Its exterior consists of larger pieces of kindling and thorns. Both sexes were observed engaged in nest construction. The eggs are pyriform, whitish and present opaque surface (average of 20.5 x 16.4 mm, 2.8 g. Brood size was 3.35 ± 0.4 eggs (n = 20. The youngs are similar to the adults. A single individual was recorded engaged in incubation. Incubation time was 15.3 ± 0.7 days and the fledging time was of 13.6 ± 1.1 days. Canopy openness above nests was less than at five meters north of nests (16.4 and 20.3%, respectively; p = 0.036, n = 18. These data suggest that S. albilora might exhibit a preference for more open canopy cover sites. Several groups were observed using old nests. Agonistic interactions were registered during the reproductive station. The reproductive period of this species extends from August to December.

  9. Mercury at the Oat Hill Extension Mine and James Creek, Napa County, California: Tailings, Sediment, Water, and Biota, 2003-2004

    Science.gov (United States)

    Slowey, Aaron J.; Rytuba, James J.; Hothem, Roger L.; May, Jason T.

    2007-01-01

    Executive Summary The Oat Hill Extension (OHE) Mine is one of several mercury mines located in the James Creek/Pope Creek watershed that produced mercury from the 1870's until 1944 (U.S. Bureau of Mines, 1965). The OHE Mine developed veins and mineralized fault zones hosted in sandstone that extended eastward from the Oat Hill Mine. Waste material from the Oat Hill Mine was reprocessed at the OHE Mine using gravity separation methods to obtain cinnabar concentrates that were processed in a retort. The U.S. Bureau of Land Management requested that the U.S. Geological Survey measure and characterize mercury and other chemical constituents that are potentially relevant to ecological impairment of biota in tailings, sediment, and water at the OHE Mine and in the tributaries of James Creek that drain the mine area (termed Drainage A and B) (Figs. 1 and 2). This report summarizes such data obtained from sampling of tailings and sediments at the OHE on October 17, 2003; water, sediment, and biota from James Creek on May 20, 2004; and biota on October 29, 2004. These data are interpreted to provide a preliminary assessment of the potential ecological impact of the mine on the James Creek watershed. The mine tailings are unusual in that they have not been roasted and contain relatively high concentrations of mercury (400 to 1200 ppm) compared to unroasted waste rock at other mines. These tailings have contaminated a tributary to James Creek with mercury primarily by erosion, on the basis of higher concentration of mercury (780 ng/L) measured in unfiltered (total mercury, HgT) spring water flowing from the OHE to James Creek compared to 5 to 14 ng/L HgT measured in James Creek itself. Tailing piles (presumably from past Oat Hill mine dumping) near the USBLM property boundary and upstream of the main OHE mine drainage channel (Drainage A; Fig. 2) also likely emit mercury, on the basis of their mercury composition (930 to 1200 ppm). The OHE spring water is likely an

  10. Physio-chemical characterization of biochars pyrolyzed from miscanthus under two different temperatures%不同温度下热裂解芒草生物质炭的理化特征分析

    Institute of Scientific and Technical Information of China (English)

    罗煜; 赵立欣; 孟海波; 向欣; 赵小蓉; 李贵桐; 林启美※

    2013-01-01

    potential in improving soil fertility, but also in remediating polluted soil. So far, we have understood little about miscanthus biochar, which becomes a bottleneck for applying the biochar as a soil conditioner. In this paper, miscanthus giganteus straw was dried at 105°C for 24 h, milled to<1 mm, and pyrolysed in a Carbolite CWF 1 200 furnace with a sealable retort (Carbolite, Hope, UK), flushed with argon. The furnace was initially heated to 100°C. The temperature then increased to 350 (BC350) or 700°C (BC700) at 1°C min−1, and finally held at 350 or 700°C for 30 min. The resulting biochars were subsequently cooled to room temperature overnight, while maintaining the argon flush, and were collected and then their characteristics were determined with different methods. The aim was to investigate the nature of the biochar and its changes with temperature. The results showed that the physio-chemical properties of the biochar were largely determined by the carbonization temperature. The miscanthus biochar produced at 350℃ (BC350) contained more water-soluble components, indicating it giving higher soil fertility if applied in soil. For example, as biochar was added to soil at application rates equivalent to 5%of total soil organic C, this gave 222 and 16 µg water-extractable C g-1 soil for biochar350 and biochar700, respectively. The latter C concentration is clearly negligible. The same trend was found for NH4+-N, but on a much smaller scale: 1.75 and 0.18 µg NH4+-N g-1 biochar, equivalent to 0.09 and 0.01 µg N g-1 soil, for biochar350 and biochar700, respectively. BC700 had higher pH, C/N ratio, water-holding capacity (WHC), and surface area. Theδ13C value, however, showed no difference between BC350 and BC700, while extractable NO3−-N was not detected in the water extracts from both biochars. The paper also discussed the potential value and its prospects of industrial application of miscanthus biochar, with current biochar producing equipment development

  11. Impact of Climate Change on Rain-fed Farming and Response Solutions in Semiarid Area of Northwest China%气候变化对西北半干旱区旱作农业的影响及解决途径

    Institute of Scientific and Technical Information of China (English)

    王红丽; 张绪成; 魏胜文

    2015-01-01

    通过分析气候变化对西北半干旱区旱作农业生产的影响、当前生产中应用的主要抗旱技术、提高粮食生产能力的机理等,以探索应对未来气候变化下西北旱作农业发展的技术途径,为推动未来旱作农业发展、保障粮食安全提供参考。结果表明,未来气候变化对西北半干旱区作物生长的影响主要有3方面:一是气温升高导致作物产量降低,品质下降;二是降水量和降水格局变化引发的作物干旱/洪涝问题;三是极端气候引发的气象灾害导致粮食生产波动。为适应或缓解上述不利影响,提高有限降水利用效率、优化土壤结构、提升土壤肥力、增强作物-土壤体系抵御环境变化的能力,缓解未来气候变化对西北半干旱区粮食生产的影响,应主要从3方面入手:(1)覆盖聚集降水,提高土壤蓄水保墒能力,改变土壤水分分配,调控土壤水分运移并提高降水入渗效率,从而“调水”以适应降水变化;(2)土壤培肥优化土壤结构、改良土壤理化性质,从而“改土”提高作物-土壤体系对环境变化的适应能力以应对未来气候变化,稳定旱作农业生产力;(3)通过“调水”和“改土”技术集成,形成“水土协调”技术体系以综合应对未来气候变化,减缓未来气候变化对西北半干旱区粮食生产的不利影响。%The impact of climate change on the agriculture production in semi-arid areas of Northwest, the major drought-resistant technolo-gy, the mechanism of increasing grain production were analyzed to explore technical solutions to retort the future climate change, future de-velopment of rainfed agriculture, and provide reference for food security. The results showed that the impact of future climate change on crop growth had main three aspects:Firstly, higher temperatures resulted in lower crop yield and quality decline;Secondly, changes in

  12. Methods to reduce mercury pollution in small gold mining operations

    Directory of Open Access Journals (Sweden)

    Pantoja-Timarán, F.

    2005-06-01

    Full Text Available The use of mercury for gold beneficiation is still a current practice in small mining operations, mainly in underdeveloped countries, due to the low investment required and necessity of easy to operate systems. But the lack of basic protections makes unavoidable the high pollution of water streams, soils, and in fact, human bodies. Some improvements have been done at site like that related to the removal of the mercury from the amalgam, that usually was done in the open air and now have been changed to the utilization of artisan iron retorts which considerably reduce the emissions of mercury vapors to the atmosphere, but there are still high losses of mercury into the waste solids or tailings coming from the amalgamation process (nearly most of the total weight of the ore treated. In order to reduce the mercury losses into the tailings from the process, this research work has been based in the use of cheap systems, available to the isolated miners, to proof that it is feasible to get an important reduction of the losses and the pollution. The procedure has been accomplished by means of washing the ores with alkaline or detergent agents, together with the use of activated mercury purified by electrowinning in a simple device, easily manufactured in site by the own workers. It is also proven herewith that controlling the time of amalgamation and the total amount of mercury used could reduce the total pollution, and in addition, the gold recovery would be improved. This investigation reports the possibility of a reduction of mercury losses down to 2.4 g per 100 g of gold produced (case of rich ores like La Bruja, with gold recovery up to 94 %; and 8,6 g per 100 g of gold produced (from ores with average grades like La Gruesa, and gold recoveries in the range of 92 %. All that is about 20 to 100 times lower than data reported in current bibliography. The introduction of a previous step of the ore concentration in shaking tables, decreases the total

  13. PREFACE: Stimuli Stimuli

    Science.gov (United States)

    Queisser, Hans J.

    2011-01-01

    well-rehearsed talk. The audience was intrigued by this new principle of stimulated coherent microwave radiation [3]. Friedrich Hund, famous for his 'rule' was then our theory professor, he sat in the second row. He was very surprised, and asked me in the discussion if he had understood correctly. If it were true what I had just suggested, then the maser coherence length would go from the Earth to the Moon. I paused a little, pondered and observed my microwave-conscious friends in the audience nodding encouragingly. 'Yes, sir; I think so!' 'I don't believe it', Hund retorted. How could a youngster react? I remained silent and obediently, quite imperceptibly shrugged my shoulders. After the talk, Professor Lamla, an editor of a science journal came to congratulate me and asked for a manuscript. I delivered [4]. This item on my early publication list may have contributed to the fact that I was hired in 1959 by William Shockley to join his fledgling company Shockley Transistor in this old apricot barn on 391 South San Antonio Road in Mountain View, California [5]. I knew that it would be extremely difficult to extend the frequency into the optical regime, you have to fight against the square of the frequency. Nevertheless, I refrained from making the statement in my paper that reaching an optical maser might be hopeless [4]. 'Never say never' is an appropriate adage, not only for seniors. A young colleague, who had also written a review paper, dared to support a more pessimistic view [6]. He anticipated in his very last sentence that stimulated emission would probably prevail merely in the microwave regime. This defeatist attitude seemed to have ruled throughout Germany, as already preached in the famous textbooks by Pohl [7], and also assumed by physics Professor Hellwege at Darmstadt, who was the leading expert regarding luminescence of materials such as ruby crystals; yet Maiman and others surpassed him [8]. Silicon came next for me, working, for example, with Shockley