microbial formation and degradation of carbonates

geomicrobiology

Ngày tải lên : 08/04/2014, 02:21

... surface and in the subsurface of Earth, the weathering of rocks, soil and sediment formation and transformation, and the genesis and degradation of various minerals and fossil fuels Geomicrobiology ... to the recognition of the significance of microbial oxidation of H2S to elemental sulfur in the formation of sedimentary sulfur deposits Our early understanding of the role of bacteria in sulfur ... editorial board of the Annual Review of Earth and Planetary Science She is on the scientific advisory board of Mascoma Corporation, and is a member of the American Society of Microbiology and the American...

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study the substitution of fossil fuels by rdf produced from municipal solid waste of hanoi m.a thesis waste management and contaminated site treatment

Ngày tải lên : 09/01/2015, 08:53

... population and quickly growing o f living standard as well as consumerism give Vietnam more and more challenges One o f them is the growth o f energy demand in all sectors Prices of electricity and ... in western and eastern countries is different The distinction in paper and cardboard can be a good example In Italy and UK, the percentage of paper and cardboard is respectively times and 10 times ... market and in demanding the proper design o f combustion systems In terms o f densified or pelletized RDF (Figure 8), it has advantages over fluff type It is transportable and easier to handle and...

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Effect of unsaturated fatty acid esters of biodiesel fuels on combustion, performance and emission characteristics of a DI diesel engine

Ngày tải lên : 05/09/2013, 15:28

... generation) The presence of hydroperoxides increases the risk of polymerization and acidiﬁcation and of the appearance of insoluble sediments and gums, which can lead to ﬁlter plugging and deposits in ... Where, JT 80:20 = Blend of 80 % of jatropha oil methyl ester and 20 % of tallow oil methyl ester by volume, JP 50:50 = Blend of 50 % of jatropha oil methyl ester and 50 % of palm oil methyl ester ... volume, JT 50:50 = Blend of 50 % of jatropha oil methyl ester and 50 % of tallow oil methyl ester by volume, SFCt 50:50 = Blend of 50 % of sunflower oil methyl ester and 50 % of coconut oil methyl...

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Tài liệu LIQUID FOSSIL FUELS FROM PETROLEUM ppt

Ngày tải lên : 23/01/2014, 07:20

... mining, processing, and refining of oils from tar sands Table 47.18 lists chemical and physical properties of several tar sand bitumens.15 Further refining will be necessary because of the high density, ... K P Thomas et al., "Chemical and Physical Properties of Tar Sand Bitumens and Thermally Recovered Oils," in Synthetic Fuels from Oil Shale and Tar Sands, Institute of Gas Technology, Chicago, ... 14 H Tokairin and S Morita, "Properties and Characterizations of Fischer-Assay-Retorted Oils from Major World Deposits," in Synthetic Fuels from Oil Shale and Tar Sands, Institute of Gas Technology,...

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Tài liệu FOSSIL FUELS: ENVIRONMENTAL EFFECTS doc

Ngày tải lên : 18/02/2014, 04:20

... monoxide; (b) the oxides of sulfur, SO2 and SO3 (represented as SOx); (c) the oxides of nitrogen, NO and NO2 (NOx); and (d) ‘particulates’, consisting primarily of very fine soot and ash particles Air ... tons of S and N to tons of SO2 and NO, multiply by 64/32 and 30/14 [Source: Vital Signs 1996, Worldwatch Institute; Energy Information Administration.] Illustration 11-1 The annual consumption of ... fraction of gasoline 198 CHAPTER 11 sweeps right through the engine and ends up unburned in the exhaust system To understand how this happens and also to understand the related phenomenon of soot formation, ...

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Use of Alternative Fuels in Cement Manufacture: Analysis of Fuel Characteristics and Feasibility for Use in the Chinese Cement Sector pdf

Ngày tải lên : 24/03/2014, 05:20

... landfills as of 2003, and shredded tires as of 2006 (Corti and Lombardi 2004) The German Federal Environmental Office commissioned a study in 1999 to evaluate the trade-offs among different landfill ... Industrialized countries have over 20 years of successful experience (GTZ and Holcim 2006) The Netherlands and Switzerland, with respective national substitution rates of 83% and 48%, are world leaders in ... value and water content Based on the average values reported in Table II-7, and an assumed coal LHV of 26.3 GJ/ton, the range is between 1.3 and 1.8 tons of chemical and hazardous waste per ton of...

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Estimating the burden of disease attributable to indoor air pollution from household use of solid fuels in South Africa in 2000 pdf

Ngày tải lên : 29/03/2014, 18:20

... levels of recurring respiratory symptoms among children and high levels of indoor air pollution (with levels of CO, SO2 and NO2 up to 12 times those of international guidelines).24 One of the ... use of solid fuels Three health outcomes had strong evidence of a causal relationship: ALRIs in children under years, and COPD and lung cancer (from the use of coal) in adults of 30 years and ... valuable contribution of Associate Professor Theo Vos of the University of Queensland, School of Population Health We thank him not only for providing technical expertise and assistance, but also...

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clean coal technology coproduction of power fuels and chemicals pdf

Ngày tải lên : 31/03/2014, 15:21

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Báo cáo y học: " Theoretical size distribution of fossil taxa: analysis of a null model" ppsx

Ngày tải lên : 13/08/2014, 16:21

... of species, Lt, and the number of species in the pioneering genus, Nt, have negative binomial distributions (with parameters n0 and e-(λ+ γ)t and n0 and e-λt respectively); while the number of ... One characteristic of interest in the empirical study of lineages is the proportion of monotypic taxa Przeworski and Wall[5] compared the proportions of monospecific genera and of monogeneric families ... Biology and Medical Modelling 2007, 4:12 No of genera 10 No of genera 50 10 50 No of genera Figure plots (both cataclysmic extinctions scales logarithmic) of the distribution of the number of genera...

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ASTM D976 06 Standard Test Method for Calculated Cetane Index of Distillate Fuels

Ngày tải lên : 20/10/2014, 17:17

... the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent ... “35.55” and “35.65” to “35.6 cetane index.” Precision and Bias 7.1 Correlation of index values with ASTM cetane number is dependent to a great extent upon the accuracy of determination of both ... Method D86 data following Appendix X5, Correlation of Jet and Diesel Fuel of test Method D2887 and use the data from Test Method D86 in place of the actual Test Method D86 data in the calculations...

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ASTM D4539 10 Standard Test Method for Filterability of Diesel Fuels by LowTemperature Flow Test (LTFT)

Ngày tải lên : 20/10/2014, 17:18

... (Warning—Avoid buildup of vapors, and eliminate all sources of ignition, especially non-explosion proof electrical apparatus and heaters.) A1.1.7 (Warning—Avoid prolonged breathing of vapor or spray ... the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent ... Timer, capable of measuring tenths of a second 5.7 Vacuum System, capable of maintaining a constant vacuum of 20.0 0.2 kPa below atmospheric pressure at the receiver for the duration of each determination...

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ASTM D6079 11 Standard Test Method for Evaluating Lubricity of Diesel Fuels by the HighFrequency Reciprocating Rig (HFRR)

Ngày tải lên : 20/10/2014, 17:18

... and cleaned The image of the wear scar is captured using the microscope digital camera, and the dimensions of the major and minor axes of the wear scar are measured and recorded Signiﬁcance and ... item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely ... in the operation of the component.6 5.3 The wear scar generated in the HFRR test is sensitive to contamination of the ﬂuids and test materials, the temperature of the test fuel, and the ambient...

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Fossil Fuels

Ngày tải lên : 27/01/2016, 15:10

... of proven reserves of conventional liquid oil, but huge deposits of oil sands in the Athabasca region of western Canada bring 31 Fossil Fuels Sedimentary basins and major oil and gas fields of ... sands Tar sands are deposits of loose sand or partially consolidated sandstone that are saturated with highly viscous bitumen, a solid or semisolid form of petroleum Oil recovered from tar sands ... is measured in cubic metres at a pressure of 750 mm of mercury and a temperature of 15 °C (that is, at standard sea-level pressure and a temperature of 60 °F The conditions under which it is...

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Sustainability of an energy conversion system in Canada involving large-scale integrated hydrogen production using solid fuels

Ngày tải lên : 05/09/2013, 14:58

... or demand factor and a process requiring equipment maintenance [14,68,72,73] A value of is assigned if the element or process has high load and demand with lower maintenance and a value of is ... University of Toronto, Canada, 1987 He is a Professor of Mechanical Engineering at the University of Ontario Institute of Technology in Oshawa, Canada, where he served as founding Dean of the Faculty of ... indicates the level of recyclability or reuse of the element or process [68,72,73] A value of is assigned if most of the element or process is recyclable or reusable and a value of is assigned if...

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Alternate strategies for conversion of waste plastic to fuels

Ngày tải lên : 27/11/2013, 21:35

... polymers demand in the country Table documents the demand of different polymers in India during years 1995-96, 2001-02, and 2006-07 The comparison of demand and consumption from Tables and indicates ... Equations (1) and (2) represent the thermal degradation, and (3) represents the random degradation route of the polymers pyrolysis The fourth type of mechanism, that is, cross-linking often occurs ... problem of disposal of plastic waste It also offers the higher cracking ability of plastics, and the lower concentration of solid residue in the product [3] 4.2.1 Mechanism of Catalytic Degradation...

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Knut Einar Rosendahl (ed.) Social Costs of Air Pollution and Fossil Fuel Use – A Macroeconomic Approach pdf

Ngày tải lên : 06/03/2014, 16:20

... reflect the kind of use of the model Thus, MSG-EE offers interesting studies of e.g environmental effects of both various levels and compositions of economic activity As energy and environmental ... maintained and 50 per cent replaced The prices of maintenance and replacement of materials depend inter alia on the extent of damage, building size and shape, design, material quality and choice of contractor ... are emissions of NOx and VOC However, the formation of ozone is a complex 45 Social Costs of Air Pollution process, and close to large emission sources of NOx the concentration of ozone may actually...

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Unconventional Fossil-Based Fuels potx

Ngày tải lên : 06/03/2014, 21:20

... Costs of Synthetic Crude Oil from Integrated Mining and Upgrading of Oil Sands, with and Without Carbon Capture and Storage, and of Conventional Crude Oil in 2025, Versus Diﬀerent Costs of CarbonDioxide ... that of the city of Calgary (Woynillowicz, Severson-Baker, and Raynolds, 2005; Griﬃths, Woynillowicz, and Taylor, 2006) Production of one bbl of SCO by mining requires between and 4.5 bbl of water ... 54 Estimated Unit Costs of Synthetic Crude Oil from Steam-Assisted Gravity Drainage with Upgrading of Oil Sands, with and Without Carbon Capture and Storage, and of Conventional Crude Oil in...

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Fossil Vertebrates of Arabia_2 potx

Ngày tải lên : 23/03/2014, 01:20

... Alteration of the arrangement of marine basins and hence ocean circulation patterns, genand formation of eration of topographic volcanic debris into the ,-olcanic fronts atmosphere can all have profound ... spread of grassland major climatic regimes intertace in this region and adapted fauna (Gabw1ia and Chochieva, 1982; the climate and weatl1er of the Arabian Peninsula MacFadden and Ceding, 1994), and ... expansion of grassland and of graz ing-adapted faunas has been described in South America (Pascual and Juareguizar, 1990), Australia (Stein and Robert, 1985), and North America (Mac.Fadden and Ceding,...

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Fossil Vertebrates of Arabia_1 pot

Ngày tải lên : 23/03/2014, 01:21

... VVhybrow and Andrew Hill Summary and overview of the Baynunah fauna, Emirate of Abu Dhabi, and its context Andrew Hill and Peter] Whybrmv Histor y of palaeontological research in the Western Region of ... May Hill) and to the memory of Rowland Hill)· and also to the memory of Roger Hamilton and Colin Patterson) FRS CONTENTS Foreword Aeolian and sabkha sediments in the Miocene Shuwaihat Formation, ... London of Oman, and the Republic of Yemen Eminent scientists from Arabia, Eur Andrew ope, and the United States provide pology at Yale UniYersity and curaror up-to-date information on Arabian of...

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Fossil Vertebrates of Arabia doc

Ngày tải lên : 29/03/2014, 18:20

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