synthesis of heat induced separation network for condensation of volatile organic compounds
Tài liệu Glossary of Volatile Organic Compounds ppt
... volcanoes and forest fires Benzene is a natural part of crude oil, gasoline, and cigarette smoke Benzene is one of the major components of JP-8 fuel Industry is the main source of benzene in ... animals Route of exposure People are exposed to benzene mainly through breathing air that contains it, for example while showering or bathing The level of exposure to benzene through food (for example, ... large U.S study, 95% of the participants had a benzene concentration up to 0.48 parts per billion in their blood (0.15 ppb for nonsmokers and 0.66 ppb for smokers) The effect of benzene exposure...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
... DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS APPLICABILITY 1.1 This method (Method 310) applies to the determination of ... LVP-VOC status of compounds or “mixtures.” The Executive Officer will test a sample of the LVP-VOC used in the product formulation to determine the boiling point for a compound or for a mixture ... no enforcement action for violation of the VOC standards will be taken 3.7.2 If the Executive Officer is unable to verify the accuracy of the supplied formulation data, then the Executive Officer...
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Source Identification of Volatile Organic Compounds in Houston, Texas pdf
... overfitting of c13-benzene for the case of 10 sources Neither poor fit nor over fit is acceptable So the number of sources for this analysis was chosen to be During the experiments, FIGURE Profiles of ... respectively Some of the reasons for this selection are benzene, toluene, and xylene (BTX) compounds are usually considered of high importance for urban VOC reactivity/air quality, propene is one of the ... The principle of the PTR-MS is the reaction of organic species in ambient air with H3O+ ions, generated from the hollow cathode discharge of water vapor, to produce the protonated organic species...
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Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
... transformation of VOCs downwind of the metropolitan area Measurable VOCs as defined here consist of non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (OVOCs), including formaldehyde ... individual and classes of VOC species This will be used to help understand the chemical transformation of air parcels as they are exported out of and downwind of the MCMA For organic compounds the VOC ... to the right of each bar graph is a breakdown, for T0 and T1, respectively, of all of the species measured in terms of the sums of the mixing ratios for each compound class ratios for propane,...
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Development of new methodologies for the synthesis of enantiomerically enriched compounds
... DEVELOPMENT OF NEW METHODOLOGIES FOR THE SYNTHESIS OF ENANTIOMERICALLY ENRICHED COMPOUNDS LEE CHENG HSIA ANGELINE (B.ApplSc (Hons.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... stereocontrol of the C – C bond formation in the reactions of allylmetals with aldehydes and ketones This widespread use of allylic organometallics in controlling the stereochemistry of organic synthesis ... participation of alkene in the formation of aldehyde via ozonolysis (path C), the facile one-carbon homologation to δ-lactones via hydroformylation (path D), the selective epoxidation for introduction of...
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PROTOCOL FOR EQUIPMENT VERIFICATION TESTING OF VOLATILE ORGANIC CHEMICAL REMOVAL ppt
... Testing Plan for Removal of Volatile Organic Chemicals by Air Stripping Technology 2-1 Chapter 3: EPA/NSF ETV Equipment Verification Testing Plan for Removal of Volatile Organic Chemicals ... Statement of typical rates of consumption of chemicals, a description of the physical and chemical nature of wastes, and rates of waste production; concentrates, residues, etc.; Definition of the performance ... Protocol document for VOC removal Refer to the “EPA/NSF ETV Protocol For Equipment Verification Testing For Volatile Organic Chemical Removal: Requirements For All Studies” for further information In...
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Báo cáo sinh học: "A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds" pot
... of RIfS sensing device, testing of sensing performance data processing and composition of the draft manuscript LP was involved in designing and in the fabrication of the microfluidic system for ... with major presence of H2S that arises from bacterial metabolism of amino acids and proteins is another example of biomedical determination of H2S that can be used for diagnosis of specific diseases ... operators, often require a large volume of sample and cannot be used for real-time measurements Hence, development of new methods to address these limitations for the biomedical measurement of H2S...
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báo cáo hóa học:" A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds" pdf
... of RIfS sensing device, testing of sensing performance data processing and composition of the draft manuscript LP was involved in designing and in the fabrication of the microfluidic system for ... with major presence of H2S that arises from bacterial metabolism of amino acids and proteins is another example of biomedical determination of H2S that can be used for diagnosis of specific diseases ... operators, often require a large volume of sample and cannot be used for real-time measurements Hence, development of new methods to address these limitations for the biomedical measurement of H2S...
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Báo cáo hóa học: " A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds" docx
... operators, often require a large volume of sample and cannot be used for real-time measurements Hence, development of new methods to address these limitations for the biomedical measurement of H S ... http://www.nanoscalereslett.com/content/6/1/634 Page of Figure Schematic of the RIfS device for gas sensing Scheme of detection of VSCs using nanoporous Au-AAO reusable halves and sealed during use by fixing in a bondless microfluidic ... and a syringe pump for suction of a known volume of air (part 3) as shown in Figure Before collection of a breath sample, the volunteers were asked to keep their mouth closed for They were then...
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Estimation of emissions of nonmethane organic compounds from a closed landfill site using a landfill gas emission model
... potential (m3/mg of waste), Mi = the mass of solid waste in the ith section of the landfill (mg), ti = the age of the ith section of the section of the landfill (years), t = the age of the landfill ... Journal of Energy and Environment (IJEE), Volume 4, Issue 1, 2013, pp.85-92 Figure Graph of frequency against range of values of age of landfill (t) Figure represents range of values of the total ... concentration of NMOC, the age of the landfill and the annual refuse acceptance rate For example, a comparison of the result of the probabilistic outcome of the total annual mass emission rate of NMOC,...
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Tài liệu METHOD 21 - DETERMINATION OF VOLATILE ORGANIC COMPOUND LEAKS doc
... practices and determine the applicability of regulatory limitations prior to performing this test method 5.2 Hazardous Pollutants Several of the compounds, leaks of which may be determined by this method, ... been published for the compounds of interest for the instrument or detector type, the response factor determination is not required, and existing results may be referenced Examples of published ... [Reserved] References Dubose, D.A., and G.E Harris Response Factors of VOC Analyzers at a Meter Reading of 10,000 ppmv for Selected Organic Compounds U.S Environmental Protection Agency, Research Triangle...
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USEPA REGION 9 TECHNICAL GUIDELINES FOR ACCURATELY DETERMINING VOLATILE ORGANIC COMPOUND (VOC) CONCENTRATIONS IN SOIL AND SOLID MATRICES potx
... USEPA’s Office of Solid Waste, developed (as part of SW-846) Method 5035, “Closed-System Purgeand-Trap and Extraction for Volatile Organics in Soil and Waste Samples,” and Method 5021, Volatile Organic ... Soils for In-Vial Analysis of Volatile Organic Compounds US Army Cold Regions Research and Engineering Laboratory, Special Report 96-5 Hewitt, A.D (1997) Preparing Soil Samples for Volatile Organic ... of Aqueous and Solid Samples for Volatile Organic Compound (VOC) Analysis,” a useful reference for VOC sampling and analysis.) Soil was deleted as an option for Method 5030, “Purge-and-Trap for...
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Reduction of Volatile Organic Compound Emissions from Automobile Refinishing docx
... Research Laboratory Off ice of Research and Development U.S Environmental Protection Agency Research Triangle Park, NC 2771 Center for Environmental Research Information Off ice of Research and Development ... of materials which offsets the capital cost (annualized over 10 years) for installing a spray booth to accomodate the additional drying time required for enamel coatings Also, for all types of ... and provide a bond for the topcoat A breakdown of the relative properties and costs for the different types of primer formulations is presented in Table 3-1 The values presented for each primer...
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Báo cáo hóa học: " Effects of rehydration nutrients on H2S metabolism and formation of volatile sulfur compounds by the wine yeast VL3" docx
... while the concentration of higher alcohols was decreased (Additional file 1) Further characterisation of the effect of rehydration nutrients on the formation of volatile sulfur compounds was obtained ... nutrients induced the formation of H2S while the addition of DAP delayed it Page of 11 (Figure 1c) Nonetheless, these results support our previous hypothesis of distinct effects for each of the treatments ... Francis I, Henschke PA (2011) Comparison of inorganic and organic nitrogen supplementation of grape juice - Effect on volatile composition and aroma profile of a Chardonnay wine fermented with Saccharomyces...
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Occurrence and fate of semivolatile organic compounds (SVOCs) in the tropical atmosphere
... surrogate for organic phase; hence octanol / water partition coefficient (KOW) is often regarded as a descriptor for the distribution of a chemical between organic phase and water The magnitude of KOW ... of determination (R2) used for the log Kp vs log pLo for this study and other studies 114 Table 6.4 Regression parameters of Equation (6.4) for calculation of KOA for SVOCs based on capillary ... aqueous free energy of solvation of compounds Gravitational settling velocity Standard deviation of wind speed Kinematic viscosity Kinematic viscosity of solution xv List of Abbreviations ACE...
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Fault tree synthesis from a directed graph model for a power distribution network
... TREE SYNTHESIS FROM A DIRECTED GRAPH MODEL FOR A POWER DISTRIBUTION NETWORK Digraph and loop analysis For this network, the specific top event of concern is a
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Báo cáo khoa học: Mycobacterium tuberculosis possesses a functional enzyme for the synthesis of vitamin C, L-gulono-1,4-lactone dehydrogenase doc
... l-gulono-1,4-lactone dehydrogenase of M tuberculosis is a specific enzyme for the biosynthesis of L-AA As far as we know, this is the first report of a specific biosynthetic enzyme for vitamin C in bacteria ... therefore play a role in horizontal transfer of vitamin C-related genes In the process of microbial adaptation, horizontal gene transfer is essential for the dissemination and assembly of detoxification ... an optical density of 0.8 at 600 nm in 200 mL of culture volume, and then IPTG was added to a final concentration of 0.1 mm for induction, and the fusion protein was produced for h or h, as indicated...
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Báo cáo khoa học: Reconstruction ofde novopathway for synthesis of UDP-glucuronic acid and UDP-xylose from intrinsic UDP-glucose inSaccharomyces cerevisiae pptx
... importance of UDP-Xyl, there is currently no affordable system for production of large amounts of this nucleotide sugar Thus, we worked to develop a similar system for in vivo production of UDP-Xyl ... production of UDP-GlcA and UDP-Xyl via conversion of a large precursor pool of UDP-Glc into the derivative molecules Here, we report the generation of yeast strains capable of producing large amounts of ... and at pH 8.4 for 40 One unit of enzyme activity is defined as the amount of enzyme that resulted in production of lmol UDPGlcAÆmin)1 at 25 °C For each substrate, reactions were performed in duplicate...
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Báo cáo khoa học: "Analysis and Synthesis of the Distribution of Consonants over Languages: A Complex Network Approach" pptx
... concept of complex networks to develop a platform for a holistic analysis as well as synthesis of the distribution of the consonants across the languages In the current work, with the help of PlaNet ... Degree distribution of PlaNet for the set VL The figure in the inner box is a magnified version of a portion of the original figure Degree Distribution of PlaNet The degree of a node u, denoted ... degree k) of occurrence Regime of Figure 3(b) also correspond to these 21 consonants On the other hand Regime of Figure 3(a) as well as Regime of Figure 3(b) comprises of the rest of the consonants...
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