summary of concentrations of selected volatile organic compounds in public wells in com

Tài liệu Glossary of Volatile Organic Compounds ppt

Ngày tải lên : 14/02/2014, 03:20

... naturally in crude oil and in the tolu tree It is produced in the process of making gasoline and other fuels from crude oil Toluene is also used in making paints, paint thinners, fingernail polish, ... effects Exposure to high levels of ethylbenzene in air can cause dizziness, throat and eye irritation, tightening of the chest, and burning feeling in the eyes At high concentrations, ethylbenzene ... during forest fires Xylene is used as a solvent and in the printing, rubber, and leather industries It is used as a cleaning agent and a thinner for paint and varnishes Xylene is a major component...

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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc

Ngày tải lên : 14/03/2014, 20:20

... TESTING TO DETERMINE REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS This section specifies the procedure for determining the percent by weight of the reactive organic compounds contained ... 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 ... organic compounds in the non-propellant portion n = number of non-exempted volatile organic compounds in the non-propellant portion WL = weight (gm) of the non-propellant portion, excluding container...

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Source Identification of Volatile Organic Compounds in Houston, Texas pdf

Ngày tải lên : 22/03/2014, 14:20

... values of wind direction and wind speed of sample i The ranges of wind direction and wind speed are divided into a series of subranges having similar numbers of samples in each Then each wind direction/ ... concentration of compound j measured in sample i, the concentration of compound j in the emission of source p, and the strength of source p on sample i (16, 19) In this section, wind direction and wind ... by a random series (d) Select an interval of noise in mfc Although it is difficult to determine the exact starting and ending points of the noise interval, the selected noise range should be sufficiently...

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Chemical evolution of volatile organic compounds in the outﬂow of the Mexico City Metropolitan area potx

Ngày tải lên : 28/03/2014, 20:20

... identiﬁed as a single point in Fig Point (∼17:00) is an interception of the plume at a lower altitude upon return into the MCMA The higher mixing ratios of MTBE at the beginning and the end of the ﬂights ... evolution of volatile organic compounds Fig The top 20 compounds measured at T0 (top panel) and T1 (lower panel) in terms of mixing ratios between 09:00 and 18:00 local time averaged over the month of ... evolution of volatile organic compounds Fig 13 Results of a MM model run initialized with T0 data as a function of the processing time as calculated by the Master Mechanism In order to eliminate...

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Using a Spend Analysis to Help Identify Prospective Air Force Purchasing and Supply Management Initiatives - Summary of Selected Findings potx

Ngày tải lên : 06/03/2014, 16:20

... Management Initiatives: Summary of Selected Findings Summary of Selected Findings July 2003 July 2003 The U.S Air Force (USAF) faces an increasingly broad array of tasks calling for changing force ... standardization Lack of economies of scale or scope or tradeoffs among them Lack of economies of scale or scope or tradeoffs among them Separate pots of funding Separate pots of funding Payoffs from competition ... Contractor’s core competencies? 56 Contractor’s core competencies? # or in industry? # or in industry? Investing in improvements? Investing in improvements? Underestimates - many firms have multiple...

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A REVIEW OF SELECTED PERSISTENT ORGANIC POLLUTANTS potx

Ngày tải lên : 14/03/2014, 19:20

... aldrin contains 90% aldrin as defined above (WHO, 1989a) Technical aldrin contains no less than 85.5% of the main ingredient (HHDN), not less than 4.5 % of insecticidally active related compounds ... updated 5.1 ALDRIN 5.1.1 Introduction Aldrin was first synthesized in 1948, and commercially manufactured as a pesticide in 1950 Aldrin is the common name ;of the insecticide containing 95 % HHDN ... typical mean concentrations are presented in Tables 3.5-1 to 3.5-8 for information Noteworthy is that inspection of this data showed indications of declines in concentrations since some of these...

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Analysis of the atmospheric distribution, sources, and sinks of oxygenated volatile organic chemicals based on measurements over the Pacific during TRACE-P pdf

Ngày tải lên : 14/03/2014, 20:20

... CH3OH sources in the model Except for HCHO, all of the OVOC considered in this study are quite insoluble (R Sander, Compilation of Henry’s law constants for inorganic and organic species of potential ... Lack of any latitudinal trend in HCHO is in part due to measurements close to the limit of detection ($30 ppt at 2s for 5-min averages) and in part due to the homogeneity of the sources and sinks ... manuscript in preparation, 2003) Figure Latitudinal distribution of selected OVOC in the upper troposphere (8 – 12 km) A filter is used to minimize pollution influences as in Figure The lines represent...

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Báo cáo y học: "Effects of p-Synephrine alone and in Combination with Selected Bioflavonoids on Resting Metabolism, Blood Pressure, Heart Rate and Self-Reported Mood Changes"

Ngày tải lên : 25/10/2012, 11:04

... data indicate that increasing the hesperidin from 100 mg to 1,000 mg reversed some of the thermogenic effects of 100 mg hesperidin in combination with 50 mg p-synephrine plus 600 mg naringin It ... This increase in thermogenesis is similar to the increases reported in previous studies involving p-synephrine [17, 18] The increase in RMR between Group 4, the combination of p-synephrine with ... observed in response to p-synephrine or p-synephrine in combination with naringin and hesperidin (Table 2) p-Synephrine differs from ephedrine in that it has a hydroxyl group on the para position of...

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Tài liệu Environmental impacts of petroleum production: Fate of inorganic and organic chemicals in produced water from the Osage-Skiatook Petroleum Environmental Research sites, Osage County, Oklahoma doc

Ngày tải lên : 14/02/2014, 03:20

... academia are involved in a multidisciplinary investigation to study the transport, fate, and natural attenuation of inorganic salts, trace metals, organic compounds and radionuclides present in produced ... in poorly maintained injection wells, and simply running the water over the ground Impacts of these past practices are apparent in salt scars, dead trees and other vegetation, contamination of ... University of Tulsa, Continuing Engineering and Science Education (CESE), [this volume] (2002) Zielinski, R.A., Rice, C.A., and Otton, J.K., "Use of soil leachates to define the extent of brine-impacted...

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Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf

Ngày tải lên : 14/03/2014, 19:20

... configuration and composition of some of the compounds discussed in this report The Quality of Our Nation’s Waters Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells ... 101 p Library of Congress Cataloging -in- Publication Data The Quality of our nation’s waters : volatile organic compounds in the nation’s ground water and drinking-water supply wells / by John ... of 55 volatile organic compounds (VOCs) in ground water gives emphasis to the occurrence of VOCs in aquifers that are used as an important supply of drinking water In contrast to the monitoring...

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Transport and fate of persistent toxic organic chemicals in aquatic ecosystems: the Niagara River to St Lawrence River Estuary example pptx

Ngày tải lên : 22/03/2014, 14:20

... primarily of inorganic material and have an organic carbon content of only some % or less However, some of this organic content can be in the form of thin organic coatings on the mineral substrates In ... dissolved concentrations in the low ppt and ppq ranges and often continuous extraction systems are now employed The presently detected dissolved concentrations of PTOCs in water are often an order of ... in concentrations of PTOCs, including the DDT metabolite DDE (Bishop & Weseloh, 1990) Bioaccumulation of mirex has occurred in both Lake Ontario biota and biota in the St Lawrence Estuary A comparison...

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Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc

Ngày tải lên : 28/03/2014, 19:20

... Concentrations of volatile organic compounds in indoor air - A review Indoor Air, 4, 123-134 Cometto-Muniz, J.E., Cain, W.S., 1995 Mixtures of volatile organic compounds: Detection of odour, nasal ... ECA-IAQ Steering Committee 45 SUMMARY In this report, the literature on the previous usage of indicators for assessing the effects of volatile organic compounds (VOCs) in indoor air on comfort and ... methane which often is present in ppm concentrations, is a disadvantage of the PAS method 2.5 Special organic compounds in indoor air There are organic compounds in indoor air of high relevance...

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Báo cáo toán học: " Influence of different flow conditions on the occurrence and behavior of potentially hazardous organic xenobiotics in the influent and effluent of a municipal sewage treatment plant in Germany: an effect-directed approach" pot

Ngày tải lên : 20/06/2014, 20:20

... mixing effects could be estimated in total by comparing the results of Figure Toxicity of recombinant wastewater fractions Summary of the total toxicity caused by organic xenobiotics in the influent ... be ascertained by testing the recombinant fractions (Figure 5) Inhibitions of the recombinant fractions in the influent of the STP Trier were significantly toxic (median 36.9%) on 12 of 14 days, ... alterations in the bioluminescence intensity of the tested bacteria in the absence of any toxicant during incubation The inhibition of the positive controls should be in the range of 40% to 60%...

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báo cáo hóa học:" Influence of different flow conditions on the occurrence and behavior of potentially hazardous organic xenobiotics in the influent and effluent of a municipal sewage " pdf

Ngày tải lên : 21/06/2014, 17:20

... mixing effects could be estimated in total by comparing the results of Figure Toxicity of recombinant wastewater fractions Summary of the total toxicity caused by organic xenobiotics in the influent ... be ascertained by testing the recombinant fractions (Figure 5) Inhibitions of the recombinant fractions in the influent of the STP Trier were significantly toxic (median 36.9%) on 12 of 14 days, ... alterations in the bioluminescence intensity of the tested bacteria in the absence of any toxicant during incubation The inhibition of the positive controls should be in the range of 40% to 60%...

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Summary of doctorial (PH d) thesis in economics tourism economy in the north central region in international economic integration

Ngày tải lên : 14/07/2014, 13:33

... encourage domestic investment iii, Associating in developing and implementing policies for tourism economic development iv, Associating in implementing action plans of each province in combination with ... economy Completing, supplementing mechanisms of investments in tourism economy; settling interdisciplinary and interoffice affairs harmoniously such as: mechanism, policies, regulations on tax administration, ... concentrate on doing planning, plans; completing and perfecting legal document 2) To establish Tourism Economy Coordinating Committee to coordinate the development of the investment and investment...

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Báo cáo y học: " Exhaled volatile organic compounds in patients with non-small cell lung cancer: cross sectional and nested short-term follow-up study" pptx

Ngày tải lên : 12/08/2014, 18:21

... identifying biomarkers of early lung cancer probably require the use of a panel rather than single substances [17] The main finding of our study was that none of selected VOCs alone distinguished ... the exact origin of exhaled VOCs remains to be demonstrated, principal components analysis (PCA) factorised the compounds into three groups (table 4) and suggests some fascinating hypoteses It ... analysis and interpretation of data, involved in drafting the articles MG: substantial contribution to conception and design, statistical analysis and interpretation of data, involved in drafting the...

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CÁC CÔNG NGHỆ XỬ LÝ H2S VÀ VOC (VOLATILE ORGANIC COMPOUNDS) TRONG KHÍ THẢI

Ngày tải lên : 12/04/2015, 14:24

... mạch, vùng sinh phản xạ thần kinh động mạch cảnh - Thường xuyên tiếp xúc với H2S nồng độ mức gây độc cấp tính gây nhiễm độc mãn tính Các triệu chứng là: suy nhược, rối loạn hệ thần kinh, hệ tiêu ... giá Nguồn gốc , lý tính : a Nguồn gốc Trong tự nhiên : Có nước suối, khí núi lửa, thoát từ protein phân hủy Trong công nghiệp : Dihydro sufua loại khí chủ yếu tỏa trình luyện cốc từ than đá, ... Na2CO3 Ngoài ra, người ta dùng amoni cacbonat kali cacbonat làm dung dịch hấp thụ khí H2S Với amin cacbonat, phản ứng xảy sau: (NH4)2CO3 + H2S = (NH4)2S +H2O + CO2 Amomi sunfua (NH4)2S thu dung...

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Báo cáo khoa học: Crystal structure of the parasite inhibitor chagasin in complex with papain allows identiﬁcation of structural requirements for broad reactivity and speciﬁcity determinants for target proteases pptx

Ngày tải lên : 16/03/2014, 04:20

... shape of inhibitory elements (loops and the cystatin B N-terminus) (B) Zoom -in view of the interactions of papain with loop L6 of chagasin and loop L2 of cystatin B (C) Zoom -in view of the interactions ... interactions of papain with loop L4 of chagasin and the N-terminal segment of cystatin B (D) Zoom -in view of the interactions of papain with loop L2 of chagasin and loop L1 of cystatin B R91 even ... interaction is supported by a water molecule linking the N atom of G66 of chagasin and the main-chain O atom of D158e of papain In the cystatin B complex, an equivalent carbonyl is involved in...

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Báo cáo khoa học: Crystal structures of bovine odorant-binding protein in complex with odorant molecules doc

Ngày tải lên : 30/03/2014, 15:20

... levels were determined from calibration curves obtained by incubating increasing concentrations of AMA (0.076–5 lM) with a ﬁxed, saturating concentration of OBP (1 lM) In the competition curves, ... functional human retinol-binding protein in Escherichia coli using a secretion vector Biochem J 296, 209–215 41 Monaco, H.L (2000) The transthyretin–retinol-binding protein complex Biochim Biophys ... 2-iso-butyl-3-metoxypyrazine and (E) dihydromyrcenol Each ﬂuorescence point on the y-axis shows the concentration of AMA still bound per monomer of bovine odorant-binding protein (bOBP) and porcine odorantbinding...

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utah state university press out of style reanimating stylistic study in composition and rhetoric jan 2008

Ngày tải lên : 11/06/2014, 12:44

... Style: Reclaiming an “Inventional” Style in Composition 56 Style in the Diaspora of Composition Studies Style and the Public Intellectual: Rethinking Composition in the Public Sphere Back in Style: ... place of style in the discipline of composition In Out of Style, therefore, I investigate the state of our current understanding of style in the field What is missing in the way that “style” often ... written by professional writers In her Introduction 11 classic text Forming/Thinking/ Writing: The Composing Imagination, Ann Berthoff (1982), borrowing from an idea by Phyllis Brooks (1973), introduced...

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