... TESTING TO DETERMINE REACTIVE ORGANICCOMPOUNDSIN AEROSOL COATING PRODUCTS This section specifies the procedure for determining the percent by weight of the reactive organiccompounds contained ... DETERMINATION OFVOLATILEORGANICCOMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANICCOMPOUNDSIN AEROSOL COATING PRODUCTS APPLICABILITY 1.1 This method (Method 310) applies to the determination ... portion, excluding container and packaging = weight (gm) of exempt compoundsin propellant For aerosol products containing LVP-VOC, the percent VOC shall be calculated using the following equation:...
... 1994 Concentrationsofvolatileorganiccompoundsin indoor air - A review Indoor Air, 4, 123-134 Cometto-Muniz, J.E., Cain, W.S., 1995 Mixtures ofvolatileorganic compounds: Detection of odour, ... and Lindvall, T., 1993 Volatileorganiccompoundsin ventilating air in buildings at different sampling points in the building and their relationship with the prevalence of occupant symptoms Indoor ... contained in a list of known VOCsof special interest and those representing the 10 highest peaks The list ofcompoundsof special interest is shown in Appendix Calculate Sid(mglm ), i.e the sum of...
... 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 ofsamplesin each Then each wind direction/ ... 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 ... Model In general, the ordinary bilinear receptor model can be written as X ) GFT + E (1) where X is the matrix ofVOCs concentrations, F is the matrix of source profiles, G is the matrix of source...
... transformation ofVOCs downwind of the metropolitan area Measurable VOCs as defined here consist of non-methane hydrocarbons (NMHCs) and oxygenated volatileorganiccompounds (OVOCs), including formaldehyde ... analyses In this paper we focus specifically on the characterization ofvolatileorganiccompounds (VOCs) in the MCMA, both on the ground and aloft and on the emission, transport, and transformation of ... evolution ofvolatileorganiccompounds detailed gas phase chemistry (NCAR Master Mechanism), initialized with concentrations observed at one of the ground sites in the MCMA, was used to examine the...
... 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...
... understanding sources of VOC with respect to the ozone problem There is also increasing interest in using these models to expand knowledge regarding the role of different VOC in the formation of secondary ... apply in areas with serious ozone air pollution problems, use of oxygenates in gasoline is a firm requirement in most of the rest of California including Sacramento and the San Joaquin Valley In ... Abundance of individual VOC in tunnel emissions for uphill vs downhill driving during summer 2001 17 with downhill driving and much lighter engine load Interestingly, the absolute concentrations of...
... of 55 volatileorganiccompounds (VOCs) in ground water gives emphasis to the occurrence ofVOCsin aquifers that are used as an important supply of drinking water In contrast to the monitoring ... Multiple VOCs Total number ofVOCs that occurred in mixtures Number ofVOCs occurring only in mixtures Frequency of well samples with a single VOC detection, in percent Frequency of mixtures in all ... detection ofVOCsin aquifers is important because of the widespread, large, and increasing use of ground water for drinking water In 2000, about 50 percent of the Nation’s population obtained their...
... 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 ofselectedVOCs alone distinguished ... of the condition being examined in the population at hands Owing to the low prevalence of NSCLC even inselected groups at high risk, the positive predicted value of exhaled VOCs is expected to ... 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...
... 2.7 Selected SVOCs in the Marine Environment of Singapore 34 2.7.1 Usage and Emission ofSelected SVOCs in Singapore 34 2.7.2 Occurrence ofSelected SVOCs in the Environment of Singapore ... identified in the context of understanding the fate and transfer of SVOCs in SEA are summarized below: I Determination of atmospheric SVOCs by means of chemical analyses is often time-consuming due ... used in this study (source indicated in the text) 159 Table 8.2 Annual Mean Atmospheric Fluxes ofselected SVOCs 164 Table 8.3 Concentrationsof SVOCs in SSW, SML and atmospheric gas phases during...
... of sensory cues such as off-colours, offodours, off- flavours, softening of vegetables and fruits, and slime However, even before it becomes obvious, microbes have begun the process of breaking ... methods for detection of spoilage have been devised with the goals of determining concentrationsof spoilage microbes or volatilecompounds produced by these microbes However, many of these methods ... using GC-MS-QP2010 plus (Shimadzu, Japan) equipped with flame ionization detector (FID) The injection was conducted in split less mode at 250 C for 3min by using an inlet of 0.75 mm i.d to minimize...
... vinyl textured white vinyl finish with finish with unfinished veneer unfinished veneer backing backing vinyl laminant with vinyl laminant with unfinished veneer unfinished veneer backing backing ... backing Low pile with backing vinyl floor vinyl with slight residue of glue on back vinyl does not have indication of glue vinyl does not have indication of glue vinyl does not have indication of ... “Background concentrationsof individual and total volatileorganiccompoundsin residential indoor air of Schleswig-Holstein, Germany” J Environ Monit Vol 6, 745-752 Hodgson, A.T (1999) Common Indoor...
... in clinical settings [1] The definition of "benignity" concerning FL is wideaccepted [2] but conceptually difficult to maintain because the mechanisms, i.e., insulin resistance (IR), underlying ... Observation of liver fibrosis in a rat model of NASH suggests that iron induces increase in hepatocytes apoptosis and contributes to the development of fibrosis directly or indirectly via induction of ... insulin resistance and beta-cell function from fasting plasma glucose and insulin concentrationsin man Diabetologia 1985, 28:412-9 Forsberg L, Halldin J, Ekman S, Rönnberg S: Screening of binge...
... bilirubin, Gas6, procalcitonin and number of failing organs, indicating that both Gas6 and sAxl are increased in inflammatory states Gas6 and sAxl are increased during organ failure, and Gas6 is increased ... Heparin-binding protein: an early marker of circulatory failure in sepsis Clin Infect Dis 2009, 49:1044-1050 Page of 17 Balogh I, Hafizi S, Stenhoff J, Hansson K, Dahlbäck B: Analysis of Gas6 in ... increased in patients receiving intensive care or experiencing kidney failure, again indicating that Gas6 is increased in severe inflammatory states There is a nonsignificant trend to higher Gas6 in...
... 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...
... measured a variable range ofVOCs Breath or Table Literature overview ofvolatileorganiccompounds found inin vitro and in vivo studies insamples with Pseudomonas aeruginosa Volatiles reference ... −0.08 VolatileOrganicCompounds (VOCs) were ranked according their VID with high values indicating a positive correlation with Pseudomonas aeruginosa infection and negative values indicating a ... growing P aeruginosa [27,28], its odour increases when adding tryptophan This is because 2-aminoacetophenone is an intermediate in the biosynthetic pathway for quinazolines, a pathway branching...
... These guidelines address methods for: (1) handling ofsamples as intact soil cores; (2) preserving samples; (3) storing samplesin hermetically sealed containers; and (4) minimizing analyte losses ... Concentration in Soil and Solid Matrices 1.0 SUMMARY These guidelines address methods for: (1) handling ofsamples as intact soil cores; (2) preserving samples; (3) storing samplesin hermetically ... making (e.g., in excavated soils and when determining disposal or treatment options, or for determining concentrationsofVOCs that have a high affinity for the soil matrix) 7.0 ADDITIONAL BACKGROUND...
... procedures for determination oforganiccompoundsin finished drinking water, source water, or drinking water in any treatment stage The method is applicable to a wide range oforganiccompounds that ... 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 concentrationsof ... recovery of the internal standards in laboratory fortified blanks and samples Internal standard recovery should be in excess of 70% 9.5 With each batch ofsamples processed as a group within a 12-hour...
... Measuring concentrationsofvolatileorganiccompoundsin vinyl flooring Journal Air & Waste Management Association 51: 174-185 Hodgson AT 1999 Common Indoor Sources ofVolatileOrganic Compounds: ... Changes in adjusted mean indoor minus outdoor concentrationsof 12 of the 22 VOCs over the course of the study are presented in Figures and These plots show that the concentrationsof the predominant, ... observed in an office building (Hodgson et al., 2003) This result indicates the potential importance of sink effects in determining temporal pattern ofconcentrations and emission rates for less volatile...
... water samples identified that most of the groundwater sources had significant organic contamination (Table 2) In AIRUs (I~IV), in spite of having adequate iron concentrationsof 3.4~6.9 mg/L in ... appropriate for drinking water treatment Due to lack of other options/sources, groundwater with high organic contamination is even used in drinking water treatment in the rural areas of Bangladesh ... within the interstices of the filter bed media which provided increased adsorption surfaces and mechanical straining as well Organic matter causes chemical leaching of arsenic in AIRU The leaching...
... the fact that volatileorganiccompounds (VOCs) , a major group of NMOC are recognised to be highly carcinogenic even in low concentration [16]; are the main reasons nonmethane organic compound ... The number of Monte Carlo terms chosen was based on the level of uncertainty believed to exist in the values of the uncertain parameters In Figure 3, the range of values of the age of the studied ... Graph of the frequency against the range of values of CNMOC Figure Graph of frequency against range of values of average annual acceptance rate ® ISSN 2076-2895 (Print), ISSN 2076-2909 (Online)...