Atmospheric volatile organic compound measurements during the Pittsburgh Air Quality Study: Results, interpretation, and quantification of primary and secondary contributions pot

... measurements during the Pittsburgh Air Quality Study: Results, interpretation, and quantification of primary and secondary contributions Dylan B. Millet,1,2Neil M. Donahue,3Spyros N. Pandis,3Andrea ... S. N. Pandis, A. Polidori, C. O. Stanier, B. J. Turpin, and A. H. Goldstein (2005), Atmospheric volatile organic compound measurements during the Pittsburgh Air Quality Study: Results, interpretation, ... analysis of the primary and secondary components of OC in Pittsburgh during the PAQS studyFigure 8. Coefficient of determination between combus-tion or photochemically derived VOCs and the residual...

Volatile organic compound measurements at Trinidad Head, California, during ITCT 2K2: Analysis of sources, atmospheric composition, and aerosol residence times pot

... B. J.Turpin, and A. H. Goldstein (2004), Atmospheric VOC measurements during the Pittsburgh Air Quality Study: Results, interpretation, and quantification of primary and secondary contributions, ... [1994] and Sander et al. [2002]. Vertical linesindicate the time period of the experiment. The modeledseasonal backgrounds were then fit to the lower envelope of the data, and detrended compound ... slnXis the standard deviation of the naturallogarithm of the mixing ratio), and this relationship was used, in conjunction with measurements of 222Rn, to estimate the average OH concentration during...

Volatile Organic Compound (VOC) measurements in the Pearl River Delta (PRD) region, China pdf

... Correlations of acetylene and ethylene with MTBE atGuangzhou. The solid line is the regression line of the dots, and the area within the dashed lines is the 95% conﬁdence interval.Acetylene and propane ... between propane and n-/iso-butane atGuangzhou. The solid line is the regression line of the dots, and the area within the dashed lines is the 95% conﬁdence interval. The major source of benzene is ... and Kiang, C. S.: Final Re-port: HongKong and the Pearl River Delta Pilot Air MonitoringProject: Pilot study on the use of atomospheric measurements to manage air quality in Hong Kong and the...

Tài liệu Human-induced changes in US biogenic volatile organic compound emissions: evidence from long-term forest inventory data ppt

... area of monoterpene-emitting species was high in the Southern Appalachians and the Pinelands of the southeastern coastal plain (Pines tend to emit mono-terpenes). Between the mid-1980s and the ... exceeded the decreases in heatwaveAVOC emissions during the same period, as shown by the ratio of the changes in Fig. 3: averaged over all the grid cells in the region, the antilog of the mean of logðjDBVOCj=jDAVOCjÞwas ... 1737–1755Furthermore, the dependency of spatial distribution of leaves on the basal area of individuals, and the nonlinearity of the Guenther et al. (1993) algorithms,introduce nonlinearities into the...

Tài liệu METHOD 21 - DETERMINATION OF VOLATILE ORGANIC COMPOUND LEAKS doc

... the probe at the interface where the stem exits the packinggland and sample the stem circumference. Also, place the probe at the interface of the packing gland take-up flangeseat and sample the periphery. ... precision means the degree of agreement between measurements of the same known value,expressed as the relative percentage of the averagedifference between the meter readings and the knownconcentration ... place the probe at the surface of the cover interface and conduct a peripheraltraverse.8.3.1.6 Open-ended Lines or Valves. Place the probeinlet at approximately the center of the opening to the atmosphere.11628.3.1.7...

Microorganisms Associated with Volatile Organic Compound Production in Spoilt Mango Fruits docx

... (%).Results The microbial flora associated with volatile organic compound during spoilage of mango fruits were isolated and identied as seven species of bacteria and a species of yeast. These ... monocytogenes and Candida krusei respectively. The result of GC-MS analysis of diethyl ether extract obtained from healthy and spoilt mango revealed the presence of 11 and 16 compounds (Table ... monocytogenes and Candida krusei respectively. The source of these organisms could probably from soil, the fruits themselves, the harvesting/ packaging containers, mango handlers, air and dust...

Chemical Composition of Vehicle-Related Volatile Organic Compound Emissions in Central California pdf

... speciation profiles based on summer 1996 and later data only for use with the summer 2000 Central California Ozone Study. Of the profiles reported here, the summer 1999 and 2001 fuel and tunnel profiles ... University of California, Riverside, CA. EPA (1999). National Air Quality and Emissions Trends Report. U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Research ... driving results in a slope of 0.98 and R2 = 0.95. The vast majority of species fell on or near the 1:1 line (see Figure 4). The relative abundances of ethene, propene, and benzene were higher...

Volatile organic compound emission and other trace gases from selected animal buildings ppt

... of the exhaust hood through an externally heated Teon PFA line. Reference air was sampled from the roof of the of ce building in which the instrument was housed. Although the reference air ... mmPigsty The instrumental setup was installed in a neighbouring of ce building. The sample line ran up to the exhaust of a ventilation shaft in the roof where the air was sucked from near the edge ... estimates of volatile organic compounds from a dairy cowshed in Germany. J Environ Quality Nimmermark S, Gustafsson G (2005) Influence of temperature, humidity and ventilation rate on the release of...

Detection of Pseudomonas aeruginosa in sputum headspace through volatile organic compound analysis potx

... performed the acquisition and analysis of the data, designed the study and wrote the manuscript. TV aided in the data acquisition and dataprocessing, performed part of the analysis and reviewed the ... wasinvolved in the design of the study and reviewed the article. MH contributedimportantly to the interpretation of the data and critically revised the manuscript. BN was involved in the design of the ... 2).Exclusion of the non-CF bronchiectatic patients from the PLS analysis, analyzing only the CF population didnot change the results in terms of positions of the VOCs and amount of X (=VOCs) and Y...

Volatile Organic Compound (VOC) - Vluchtige Organische Stoffen (VOS) potx

... (November 2000) “any organic compound in the indoor air of homes, offices and public buildings as well as organic compounds, which emit from construction materials and are detected in the test chamber” ... definition relates to Indoor Air Quality World Health Organisation (1989) “any organic compounds” - very volatile organic compound (VVOC) < 0 up to 50 - volatile organic compound (VOC) 50 - 100 ... relates to Indoor Air Quality 2. Volatile Organic Compounds – VOC Organic compounds that are detected in the interval of n-hexane (n-C6) to n-hexadecane (n-C16) under the conditions specified...

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