summary of concentrations of selected volatile organic compounds in domestic well sample
Source Identification of Volatile Organic Compounds in Houston, Texas pdf
... 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
... 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 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 ... downwind decreasing importance of NMHCs as they are reacted away to form products In addition, a northeast transport event was studied in which air originating in the MCMA was intercepted aloft...
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Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf
... of drinking-water supplies including the monitoring of river intakes and production wells of large CWSs, as well as the continued sampling of domestic wells In addition, major factors that influence ... identifying the most commonly occurring chemical mixtures in samples from drinking-water supply wells • The occurrence of THMs in samples from drinking-water supply wells, especially public wells, ... detected in more than 30 percent of wells sampled in NAWQA’s aquifer study Fumigants occur in ground water in Oahu because of a combination of factors, including extensive use in recharge areas of...
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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
... 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 ... 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 ... analysis and interpretation of data, involved in drafting the articles, final approval of the version to be published Acknowledgements This study was supported in part by Ricerca Finalizzata 2003...
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Tài liệu Glossary of Volatile Organic Compounds ppt
... 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, ... as a cleaning fluid, in industry and dry cleaning businesses, and in the household Carbon tetrachloride also was used in fire extinguishers and as a fumigant to kill insects in grain These uses ... polystyrene packaging material People are exposed to styrene by breathing contaminated air or eating or drinking contaminated food or water Styrene can also pass through the skin into the body Health...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
... 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 ... is analyzed to determine the reactive organic compounds in the sample, including the presence of any prohibited compounds This analysis is conducted by performing the following tests:3 5.3.1 Gravimetric...
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Using a Spend Analysis to Help Identify Prospective Air Force Purchasing and Supply Management Initiatives - Summary of Selected Findings potx
... 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 structures and ... provide information along many dimensions of interest, including how much and what the contract was for, purchase office code1 issuing the contract, name of provider winning the contract, industry ... 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...
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A REVIEW OF SELECTED PERSISTENT ORGANIC POLLUTANTS potx
... 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 ... 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 ... Earliest reports of exposure to persistent organic pollutants related to human health impact include an episode of HCB poisoning of food in south-east Turkey, resulting in the death of 90 % of those...
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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
... summarized in Table based on the sampling of nine such episodes (0 – km) The quantitative interpretation of these ERs is difficult because of the extreme complexity of urban sources in Asia However, since ... 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 ... data of 20 D15S07 SINGH ET AL.: OXYGENATED ORGANICS IN THE ATMOSPHERE D15S07 Figure Distribution of selected OVOC and CO in the lowermost stratosphere [10] During TRACE-P, air masses representing...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
... procedures for determination of organic compounds in finished drinking water, source water, or drinking water in any treatment stage The method is applicable to a wide range of organic compounds that ... in µg/L in the water sample Ax = integrated abundance of the quantitation ion of the analyte in the sample Ais = integrated abundance of the quantitation ion of the internal standard in the sample ... of field and laboratory reagent blanks provide information about the presence of contaminants 525.2-7 4.2 5.0 Interfering contamination may occur when a sample containing low concentrations of...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
... shown in Fig and Table 1, Zn titration data obtained for DOM in the original river water sample seems to fit into two linear portions indicating two classes of binding sites In contrast, DOMs in ... Biodegradability of zinc binding sites in river water DOM Fig represents the variation of DOC, UV254 and SUVA during the river water incubation for weeks in the preliminary study During the first days of incubation, ... experiments revealed that 82% of Zn binding sites of river water DOM was degraded during weeks of incubation In contrast, Zn binding sites of DOM in WWTP effluent as well as their conditional stability...
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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
... (inorganic and organic) and isotopic composition of water samples from OSPER site A continued BA-01s well BA-01d well well BA-02d well BA-02s well BA-03d well BA-03s well BE-03 well BE-04 well ... TDS DOC Acetate Formate Succinate 18 δ O (‰) δD (‰) Site Name well well well BE-11 well BE-12 well BE-13 well BE-15 well BE-16 well BE-17 well BE-18 BR-01d BR-02d well well 02OS-412 02OS-413 02OS-420 ... water samples from Osage County, OK AA-02d well AA-01d well well AA-02s well AA-03d well AA-03s well AA-04d well AA-04s well AE-04 well AE-05 well AE-06 Sample # 02OS-430 02OS-427 02OS-426 02OS-429...
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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
... 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 ... are involved The areas of highest concentrations reflect these sources and in- lake processes of sediment focusing Lake sediment cores can be analyzed to determine changes in historical inputs of ... 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...
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Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc
... 1994 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, ... and Lindvall, T., 1993 Volatile organic compounds in ventilating air in buildings at different sampling points in the building and their relationship with the prevalence of occupant symptoms Indoor ... compounds in a sample A prescription of which compounds to include in the TVOC calculation This includes the defmition - of an 'analytical window' and - of a list of compounds representing the...
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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
... 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% ... dilution effect This finding could indicate a dominant influence of wastewater constituents on the toxicity of the recombinant samples under dry weather conditions An influence of flow conditions ... concentration values of the corresponding influent and effluent samples In case of a concentration below the LOQ, we calculated a value of ‘LOQ/2’ instead of using ‘0’ to avoid an overestimation of the removal...
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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
... 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% ... dilution effect This finding could indicate a dominant influence of wastewater constituents on the toxicity of the recombinant samples under dry weather conditions An influence of flow conditions ... concentration values of the corresponding influent and effluent samples In case of a concentration below the LOQ, we calculated a value of ‘LOQ/2’ instead of using ‘0’ to avoid an overestimation of the removal...
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Summary of doctorial (PH d) thesis in economics tourism economy in the north central region in international economic integration
... 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 ... combination with other provinces in the region v, Associating in implementing programmes, duties, plans, projects of the region vi, Associating in inspecting, supervising the regional policy, regulation ... Completing, supplementing mechanisms of investments in tourism economy; settling interdisciplinary and interoffice affairs harmoniously such as: mechanism, policies, regulations on tax administration,...
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CÁC CÔNG NGHỆ XỬ LÝ H2S VÀ VOC (VOLATILE ORGANIC COMPOUNDS) TRONG KHÍ THẢI
... 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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Optical Fiber Sensors to Detect Volatile Organic Compound in Sick Build- ing Syndrome Applications potx
... interesting when thinking about installing them in a building All of them could be controlled on line and real time in parallel, so if one doesn’t work properly, it wouldn’t affect the rest of ... where the transduction occurs, this is, inside or outside the fiber, dividing the sensors in two groups: intrinsic and extrinsic [15] 4.1 Extrinsic Sensors In this case, the fiber just guides the ... sensing material onto the fiber In many cases, it is in solid state and has to be solved and then deposited The implementation of the sensor involves several steps: removing the cladding, solving...
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Báo cáo y học: " Unusual cause of exercise-induced ventricular fibrillation in a well-trained adult endurance athlete: a case repor" docx
... episode of exercise-induced ventricular fibrillation in a well- trained 48-year-old endurance athlete Case presentation A 48-year-old, well- trained, long-distance runner collapsed at the finish of ... cardiologic examinations, in particular the ECG during exhausting treadmill exercise, showed no pathological findings Conclusion The majority of sudden deaths in athletes occur during or immediately ... have no competing interests Authors' contributions SV, DK, SP, TP and AH were involved in the conception, design, drafting and revising of the manuscript JA, DK and HHD were involved in the diagnosis...
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Tìm thêm: xác định các nguyên tắc biên soạn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến dòng điện stato i1 fi p2 sự cần thiết phải đầu tư xây dựng nhà máy thông tin liên lạc và các dịch vụ từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008