potential effects of physical properties
Soil and Environmental Analysis: Physical Methods - Chapter 13 ppt
Ngày tải lên :
11/08/2014, 15:20
... applications of these techniques to the characterization of soil aeration and the impact on it of tillage and traffic, the study of trace gas exchange, and the investigation of the movement of radon ... greater number of samples may be required than for, say, assessment of soil water release Laboratory treatment of samples may also influence choice of size If the matric potentials of samples have ... of measurements of gas movement in assessing tillage and compaction effects lies in their sensitivity to the continuity of air-filled pores These effects may not be detected from measurement of...
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Definition of Greenhouse gases
Ngày tải lên :
09/06/2016, 14:47
... removal rate, which is the sum of the flow of X out of the box (Fout), chemical loss of X (L), and deposition of X (D) (all in kg/sec): [68] The atmospheric lifetime of a species therefore measures ... represent averages of atmospheric concentrations of up to a few centuries rather than annual or decadal levels Since the beginning of the Industrial Revolution, the concentrations of most of the greenhouse ... from a large input of atmospheric CO2 from burning fossil fuels will result in an effective lifetime of tens of thousands of years [70][71] Carbon dioxide is defined to have a GWP of over all time...
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Impact of the global forest industry on atmospheric greenhouse gases potx
Ngày tải lên :
24/03/2014, 05:20
... atmosphere) of approximately 50 kg of CO2 equivalent per tonne of paper and 700 kg of CO2 equivalent per tonne of wood products Additional storage is accomplished in anaerobic landfills 14 Impact of ... displacement factors ranged from a low of -2.3 to a high of 15.0 [tonnes of carbon of emission reduction per tonne of carbon in wood product], with most lying in the range of 1.0 to 3.0 The average displacement ... and reviewers of this study, particularly: Teresa Presas, President of the International Council of Forest and Paper Associations (ICFPA) and Managing Director of the Confederation of European...
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Solid Waste Management and Greenhouse Gases A Life-Cycle Assessment of Emissions and Sinks potx
Ngày tải lên :
31/03/2014, 13:20
... GWP) By definition, the GWP of 1kilogram (kg) of CO2 is CH4 has a GWP of 21, which means that kg of CH4 has the same heat-trapping potential as 21 kg of CO2 N2O has a GWP of 310 PFCs are the most ... in terms of their heat-trapping potential An international protocol has established CO2 as the reference gas for measurement of heat-trapping potential (also known as global warming potential ... references to tonnage of waste in this report are in short tons All references to tons of carbon or CO2 equivalent are in metric tons (i.e., MTCE per short ton of material) EPA Office of Solid Waste,...
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ENCYCLOPEDIA OF ENVIRONMENTAL SCIENCE AND ENGINEERING - GREENHOUSE GASES EFFECTS ppsx
Ngày tải lên :
10/08/2014, 20:20
... and to study the effects of nearly doubling the present level of carbon dioxide to 600 ppmv A general description of the physical basis, structure and operation of the model, of its simulations ... and detrainment of air and the evaporation of precipitation Precipitation is calculated in terms of the water and ice content of the cloud; cooling of the atmosphere by evaporation of precipitation ... differences in their simulations of the deep ocean circulation, but identification of systematic errors is hardly possible because of the paucity of observations The distribution of temperature and salinity...
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ONLINE MONITORING OF NITROGEN GREENHOUSE GASES FROM WATER RECLAMATION PLANTS
Ngày tải lên :
27/11/2015, 12:12
... MONITORING OF NITROGEN GREENHOUSE GASES FROM WATER RECLAMATION PLANTS WANG MENG (B.Eng (Hons.), National University of Singapore) A THESIS SUBMITTEDFOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ... concentrations monitored at the air duct of the odor control system of the South Work of the UPWRP 76 vii LIST OF FIGURES Figure 2.1 Nitrogen transformation pathways of AOB, NOB and denitrifying bacteria ... easternmost of Singapore as a part of the first phase of deep tunnel sewerage system (DTSS) Besides CWRP, phase one of DTSS includes a 48km long underground tunnel from Kranji to Changi and 60km of link...
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Báo cáo y học: " Rationale for one stage exchange of infected hip replacement using uncemented implants and antibiotic impregnated bone graft"
Ngày tải lên :
26/10/2012, 09:53
... eradication of planktonic residues but are not effective in eliminating micro-clusters disrupted from biofilms that may be the cause of recurrence after an indefinite period of time Fragments of biofilms ... populations are often missed by conventional culture The problem of diagnosis markedly increases taking into account the issue of bacterial phenotypes inside biofilms Sonication of explanted devices ... Comparison of Revision of the Acetabular Component without Cement A Concise Follow-up, biofilm-associated cell survival following in vitro exposure of meticil- at Twenty to Twenty-four Years, of a...
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Impacts of Greenhouse Gas on Feed and Livestock Production
Ngày tải lên :
14/04/2013, 16:04
... (2000) Effect of feeding characteristics on methane production • Digestible organic matter or energy • Residence time in the rumen and level of intake • Source of C and pattern of fermentation ... forecasted to 590 mm/y in the end of century Source: Robert A Rohde (2006) available from: http://en.wikipedia.org/wiki/File:Greenhouse_Gas_by_Sector.png “Livestock, one of top two or three most contributors ... climate change in CO2 equivalent 18percent Includingpasture degradation and assuming that two-thirds of land use change is livestock related Livestock’s share in carbon dioxide emissions percent Not...
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Tài liệu Báo cáo Y học: Phosphatidylinositol synthesis and exchange of the inositol head are catalysed by the single phosphatidylinositol synthase 1 from Arabidopsis docx
Ngày tải lên :
22/02/2014, 04:20
... the same plot of the values found for de novo synthesis in the presence of 7.5 or 2.5 mM MnCl2 with various amounts of EDTA, or in the presence of MnCl2 only [11], as a function of the concentration ... the relevance of the exchange of polar head when de novo synthesis is studied We calculated that with a linear rate of synthesis of nmol PtdInsÆmin)1Æmg)1 (Fig 2), the concentration of CMP in a ... 1C, the labelled PtdIns of bacterial origin therefore arises from an exchange reaction Effect of EDTA on the enzymatic activities of PtdIns synthase The net activity of PtdIns synthase as an...
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detection of organic gases using tio2 nanotube - based gas sensors
Ngày tải lên :
19/03/2014, 16:47
... Characterization of nanotubular TiO2 films Figure shows SEM images of the surface of TiO2 thick films composed of nanoparticles (a) and nanotubes (b-d) Uniform TiO2 nanotubes of 600 nm in length ... probably because of the improved particle packing density in the sensing film Thus, the results obtained indicate the importance of the microstructure control of sensing layers in terms of tube length, ... microscopy (SEM), transmission electron microscopy (TEM), and porosity of the films by mercury porosimetry The gas sensing properties of the films were measured in a conventional gas-flow apparatus...
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semiconducting metal oxide sensor array for the selective detection of combustion gases
Ngày tải lên :
20/03/2014, 13:07
... 1999 from the Institute of Electronics of the National Academy of Sciences of Belarus In 1981–2000 he worked at the Physical Technical Institute of the Academy of Sciences of Belarus, Minsk, first ... almost all of the characteristics of the full feature space Fig shows the PCA of the data from three trials with different gas sequences (i.e from one of the trials based on the sequence of CH4–CO–NO–NO2–NH3–SO2–H2S, ... N00014-01-C-0132 from the Of ce of Naval Research, USA The authors thank the Laboratory for Surface Science and Technology (LASST) of the University of Maine for the preparation of the WO3 sol–gel powder...
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absorption of nitrous gases
Ngày tải lên :
09/05/2014, 17:03
... the supply of fixed nitrogen is of vital importance to the existence of the nation I n almost all processes for the fixation of nitrogen the production of oxides of nitrogen is one of the fundamental ... number of gram-mols.) of nitric oxide M = Initial volume (or number of gram-mols.) of oxygen pc = Volume of oxygen changed in time t in 100 volumes of mixture V = Total initial volume of gas ... Volumes of Nitrogen and Oxygen Curves showing the times (seoonds) of oxidation of various percentages of the nitric oxide in different mixtures of that gas with a mixture of equal volumes of nitrogen...
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SYNTHESIZE AND INVESTIGATE THE CATALYTIC ACTIVITY OF THREE-WAY CATALYSTS BASED ON MIXED METAL OXIDES FOR THE TREATMENT OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINE
Ngày tải lên :
12/05/2014, 17:14
... Influence of different reaction conditions on the activity of MnCoCe 1-3-0.75 69 3.2.4 Activity for the treatment of soot and the influence of soot on activity of MnCoCe 1-3-0.75 72 3.2.5 Influence of ... of MnCoCe 1-3-0.75 at room temperature 80 3.3 Study on the improvement of NOx treatment of MnO2Co3O4-CeO2 catalyst by addition of BaO and WO3 81 3.4 Study on the improvement of the activity of ... method of thermal analysis in which changes in physical and chemical properties of materials are measured as a function of increasing temperature (with constant heating rate), or as a function of...
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semantic web and peer-to-peer decentralized management and exchange of knowledge and information
Ngày tải lên :
03/06/2014, 02:00
... multiple dimensions of difficulty, viz pragmatics of ontology use, sloppiness of ontology mappings, scalability of mapping creation, functionality of mapping execution and evaluation of mapping quality ... combines the best features of other languages and adds some of its own In the rest of this section, we will give an overview of the basic syntax of SeRQL The overview of the SeRQL language given ... space of d; A non-empty set called the value space of d; A mapping from the lexical space of d to the value space of d, called the lexicalto-value mapping of d The lexical-to-value mapping of a...
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GREENHOUSE GASES – EMISSION, MEASUREMENT AND MANAGEMENT pptx
Ngày tải lên :
28/06/2014, 17:20
... fraction of the fuel to exhaust of the preliminary process of combustion 2.1 Mechanisms of chemical reactions in the engines The detailed chemical mechanisms of pollutant formation and kinetics of ... fertilised grassland, A 2-year study of the effects of N fertilizer form and environmental conditions Biology and Fertility of Soils, 25, pp 252-260 Emissions of Nitrous Oxide (N2O) and Di-Nitrogen ... extraction of the H atom of alkanes, cyclic ether, aldehyde or ketone, addition of radicals to oxygen, split hemolytic CC and OO and decomposition of several radicals, radical reaction of the peroxide...
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GREENHOUSE GASES – CAPTURING, UTILIZATION AND REDUCTION doc
Ngày tải lên :
28/06/2014, 17:20
... is also the major constituent of large, underutilized resources of natural gas (located in remote areas of Asia, Siberia, Western Canada and offshore reservoirs of Australia, and therefore expensive ... carbon dioxide The primary source of man-made CO2 is combustion of fossil fuels Stabilizing the concentration of atmospheric CO2 will likely require a variety of actions including a reduction ... emissions of CO2 to the atmosphere it would have to be compressed to a pressure of typically more than 10 MPa and this would consume an excessive amount of energy Also, the high volume of flue...
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Báo cáo toán học: "Modelling age- and density-related gas exchange of Picea abies canopies in the Fichtelgebirge, Germany" docx
Ngày tải lên :
08/08/2014, 14:22
... coordinates of the trees in the stand, the gas exchange of a cluster of trees with clumped leaf area similar to observation can be calculated Such clusters of trees were the subject of sapflow ... interpretation of water potential gradients in trees More generally, predawn water potential of leaves or needled branch ends serve as an integrated measure for the water status of the plant Decreases ... conductance stomatal conductance [33], and therefore effects of changed wind profiles on canopy conductance are low 2.5 Simulations Simulations of canopy CO2 and H2O exchange were carried out for...
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Báo cáo khoa học: "Influence of shade on photosynthetic gas exchange of 7 tropical rain-forest species from Guadeloupe (French West Indies)" docx
Ngày tải lên :
08/08/2014, 19:21
... regeneration of these species (Ducrey and Labbé, 1985) The study of the seedlings in relation to the intensity of regeneration fellings gave us preliminary information about light response of the species ... apparent quantum yield and which approximates to the quantum yield of the leaf (number of moles of CO assimilated per mole of photons absorbed by the leaf) except that only incident photon flux ... idea of the photosynthetic potential of tropical rainforest species They are, in fact, very close to those for temperate forest species found by Bazzaz (1979), who gives photosynthetic potentials...
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Báo cáo lâm nghiệp: "doubling atmospheric CO concentration on 2 matter distribution and CO exchange of 2 yr growth, dry 2 old sweet chestnut trees (Castanea sativa Mill.)" pptx
Ngày tải lên :
09/08/2014, 04:20
... the end of July, 62% of the enriched plants ceased growth as compared with 37% of the controls The early onset of yellowing and the stopped terminal bud growth indicates earlier senescence of the ... timing of the nutrient application The accumulation of the carbon surplus was restricted to the root system These changes could have far reaching ecological consequences for tree growth of Castanea ... matter partitioning (Table III) Table III shows that the root biomass of -enriched C0 plants was 69% heavier than roots of the control plants The increase was statistically significant The shoot...
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Báo cáo lâm nghiệp: "Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition of ions" ppt
Ngày tải lên :
09/08/2014, 04:20
... October 1986, Van Elsacker P & Impens (1986) Direct effects of simulated acid wet deposition on gas exchange of Norway spruce In: Direct Effects of Dry and Wet Deposition on Forest Ecosystems - ... addition of the ionic mix- ture The effect of acidic rain on the Gn of clone 1019 seemed to depend upon envi- ronmental and/or ecophysiological conditions (interaction pH x ions x d) A reduction of ... Research Report Commission of pp 122-131 Van Elsacker P., Martens C & Impens (1988) Direct effects of acid wet deposition on photosynthesis, stomatal conductance and growth of Populus cv Beziupr6...
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