a simple and clear inference method

... chemical manufacturing and petroleum refining area) and Research Triangle Park, NC (Wallace et al 198 4a) A succeeding major study of 350 persons in Bayonne–Elizabeth (Wallace et al 1984b) and an additional ... (silica gel, alumina, Florisil, molecular sieves), and activated charcoal and carbon-based sorbents such as graphitized carbon blacks (Carbotrap, Carbopack), and carbon molecular sieves (Carbosieve ... readily available and affordable to both researchers and analytical laboratories (Cardinali et al 2000) 7.6.2.3 Urine Because of their relatively high water solubility, short-chain alcohols and...

Ngày tải lên: 12/08/2014, 00:21

... coal and oil, benzene waste and storage operations, motor vehicle exhaust, and evaporation from gasoline service stations can cause benzene levels in the air to increase In the air, benzene reacts ... periods can cause headaches, lack of muscle coordination, dizziness, confusion, and changes in balance Acute exposures also irritate the skin, eyes, nose, and throat, and cause difficulty breathing, ... cases, coma and even death can occur In laboratory animals, carbon tetrachloride given by mouth can cause more liver tumors We not know if breathing carbon tetrachloride causes cancer in animals...

Ngày tải lên: 14/02/2014, 03:20

... more aquifer studies in two principal aquifers in California—the Central Valley aquifer system and the California Coastal basin aquifers in and near Los Angeles and in the Basin and Range basin-fill ... 10.  Analysis and Reporting at the Principal-Aquifer Scale Help Link National and Local-Scale Findings Analysis and reporting of NAWQA’s first decade of sampling have focused on national and Study-Unit ... England and Mid-Atlantic States Few samples contained fumigants, and Additional information about HBSLs and ongoing research is available in other publications (20, 41, 42) and at http://water.usgs...

Ngày tải lên: 14/03/2014, 19:20

... EPA Method 602: Purgable Aromatics, 40 CFR 136 Appendix A, Method for Organic Chemical Analysis of Municipal and Industrial Wastewater (January 2008) 2.28 US EPA Method 625: Base/Neutrals and Acids, ... and Materials (ASTM) International, National Institute for Occupational Safety and Health (NIOSH), and United States Environmental Protection Agency (US EPA) analytical test methods: 2.1 ASTM ... Gasoline and Gasoline Fractions by Gas Chromatography ( Nov 1, 2004) 2.24 ASTM D 5443-04: Standard Test Method for Paraffin, Naphthene, and Aromatic Hydrocarbon Type Analysis in Petroleum Distillates...

Ngày tải lên: 14/03/2014, 20:20

... measurement series are as follows: (a) Generate a random series r with the same length as c (7292 elements) and variance νr2 ) (b) Perform FFT on c and r, and calculate their magnitude spectra ... eqs 3a and 3b and σij ij and σ′ are the error estimates, which can be considered as ij special weights Clearly, zip is the combination of all FIGURE Illustration of FFT-based uncertainty estimation ... shows a relatively smooth shape Meanwhile, a number of anthropogenic acetic acid emitters (e.g., acetic acid storage tanks, boilers, and exhausted liquid tanks) are located to the north and south...

Ngày tải lên: 22/03/2014, 14:20

... to be of an acute nature and may show adaptation (e.g olfactory adaptation) (Clausen et al., 1985) Some effects (e.g headache) are of sub-acute nature and tend to increase in frequency and intensity ... the sorbent and to guarantee that blank values (e.g sorbent, analytical system) are low and considered in an adequate way Regarding the sampling strategy (sampling duration, time and frequency, ... nose and throat) as well as symptom questionnaire responses on odour intensity, air quality, eye and throat irritation, headache and drowsiness and mood scale measures of fatigue and confusion all...

Ngày tải lên: 28/03/2014, 19:20

... PNNL DFGAS TOGA TOGA TOGA TOGA TOGA TOGA TOGA TOGA NCAR UCI IMK-IFU Texas A& M IMK-IFU NOAA PNNL Texas A& M NOAA PNNL Texas A& M Texas A& M NOAA NOAA PNNL PNNL UCI UCI UCI UCI BNL Additional measurements ... and NOy The C130 and DC-8 flight data are archived at http://www-air.larc.nasa.gov/cgi-bin/arcstat-b The G1 flight data are archived at ftp://ftp.asd.bnl.gov/pub/ASP% 20Field%20Programs/2006MAXMex/ ... experiment was designed to characterize the chemical and physical transformations and the ultimate fate of pollutants exported from the MCMA, and was part of the MILAGRO group of field campaigns An overview...

Ngày tải lên: 28/03/2014, 20:20

... addressed methodological issues, defined standard operating procedures, and validated analytical methods of VOC collection and analysis The factors affect the SPME process, such as adsorption and desorption ... collection system and putative exhaled biomarkers Our simple method of breath collection has a number of advantages: i) it samples a fixed volume of air and discards anatomic dead space air; ii) its ... by comparing its retention time with that of pure standard and charac- The method was validated by studying the linear range, and the limits of detection and precision Linearity was established...

Ngày tải lên: 12/08/2014, 18:21

... Na4As2S5O2 + H2S = Na4As2O7 + H2O Na4As2S7 + O2 = Na4As2S6O + 2S -Dung dịch hấp phụ natri thioasenat chuẩn bị cách h a tan As2O3 natricabonat Na2CO3 nước với tỉ lệ 1:2 Trong dung dịch có natro ... thioasenat Na4As2S5O2 Phản ứng hấp thụ khí H2S dung dịch natri thioasenat xảy sau : H2S + Na4As2S5O2 = Na4As2S5O + H2O -Tiếp theo , natri thioasenat hoàn nguyên theo phản ứng : 2Na4As2S6O + O2 = 2Na4As2S5O2 ... phản ứng sau: H2S + Na2CO3 = NaHS + NaHCO3 -Tiếp theo phản ứng thu hồi lưu huỳnh Natri vanadat (NaVO3 ) NaHS + H2S + 4NaVO3 + ½ O2 = Na2V4O9 +NaOH + 3S -Để hoàn nguyên vanadat người ta dùng chất...

Ngày tải lên: 12/04/2015, 14:24

... adsorbed on particles and are consequently less bioavailable (Watanabe and Sakai, 2003) Generally, biomagnification of POPs through aquatic-based food chains is greater than 12 Chapter 2: Literature ... ingestion and inhalation of contaminated house dust Finally, an overall health risk assessment was performed based on the available data considering all potential human exposure pathways (Chapter ... for humans include food and water intake, dermal absorption, and inhalation of ambient air and airborne particles (Duarte-Davidson and Jones, 1994) Food consumption has been regarded as the most...

Ngày tải lên: 14/09/2015, 14:06

... Journal of Lightwave Technology, 2009, In press K Kawamura, K Kerman, M Fujihara N Nagatania, T Hashiba, and E Tamiya, “Development of a novel hand-held formaldehyde gas sensor for the rapid ... A Sanz, F J Arregui, I R Matías, and J Roca, “Fiber optic glucose sensor based on bionanofilms”, Sensors and Actuators B, vol 131, pp 633-639, 2008 "Occupational Safety, and Health Administration ... detection of gaseous ammonia using the near infrared transmission properties of polyaniline”, Sensors and Actuators B, vol 90, pp 163-169, 2003 B Kondratowicz, R Narayanaswamy, and K C Persaud, “An investigation...

Ngày tải lên: 14/03/2014, 20:20

Ngày tải lên: 28/03/2014, 20:20

... Energy and Environment Laboratory, National school of Engineers, Sfax University, Sfax - Tunisia 2University laboratory of Occupational Medicine and Occupational Hazards, EA 2690 Poisons and occupational ... values for workplace air or biological monitoring [8-10] and as mentioned above, we referred to the French, American and/ or German values and adopted the most severe among them (Table and table ... approval of manuscript DZN was involved in the conception and design of the project, data interpretation, manuscript writing, and final approval of manuscript All authors read and approved the final...

Ngày tải lên: 20/06/2014, 00:20

... show the minimum and maximum annual average acceptance rates to be 999.2 mg/year and 1000.8 mg/year respectively The mean, variance, and standard deviation are 1000 mg/year, 0.0504, and 0.225 respectively ... generation rate, k and potential methane generation capacity, Lo Emission type Landfill type CAA Conventional CAA Arid area Inventory Conventional Inventory Arid area Inventory Wet (bioreactor) Source: ... dioxide are the major gases produced by biodegradation of landfill wastes [2-4, 7] According to Scheutz et al [2], the biodegradable organic material in waste includes paper, animal and vegetable matter,...

Ngày tải lên: 05/09/2013, 16:11

... Bustamente-Montes LP, Hernandez-Valero MA, Garcia-Fabila M, Halley-Castillo E, Karam-Calderon MA, Borja-Aburto VH 2008 Prenatal phthalate exposure and decrease in anogenital distance in Mexican male newborns ... TESTICULAR CANCER Western Africa Eastern Asia Middle Africa Northern Africa Melanesia Eastern Africa South-Central Asia Less developed regions Caribbean South-Eastern Asia Southern Africa Western Asia ... Central America Polynesia Central and Eastern Europe South America Micronesia Western Asia Southern Africa South-Eastern Asia Caribbean Less developed regions South-Central Asia Eastern Africa Melanesia...

Ngày tải lên: 13/02/2014, 10:20

... promote stratification during backwashing Commercially available activated carbons usually have a small percentage of material smaller than the smallest sieve and larger than the largest sieve, ... GAC to obtain a better media design for a particular application also is available Contact Time, Bed Depth, and Hydraulic Loading Rate The most important GAC adsorber design parameter that affects ... the analytical procedures for testing activated carbon are given in ASTM Standards (American Society for Testing Materials, 1988) available from ASTM, 1916 Race St., Philadelphia, PA 19103, as...

Ngày tải lên: 14/02/2014, 03:20

... calculate canopy area and leaf area The methods that we use are not the only possible ones, and alternative methods for calculating canopy area and leaf area could give estimates of emissions that ... plantation, or hardwood plantation – see Methods), for two different regions, South Carolina and Georgia, and the deep south (defined here as Alabama, Arkansas, Louisiana, and Mississippi) Calculated ... gradient in temperature It therefore matters whether the total leaf area is arranged in a wide crown, giving a low leaf-area index (LAI) ( area of leaf/area of canopy, low LAI means little shading...

Ngày tải lên: 14/02/2014, 08:20

... ethanoic acid (acetic acid) d) Esters An ester is formed from the combination of a carboxylic acid and an alcohol They are often highly aromatic compounds and are used for flavors and fragrances ... alphabetical order II Naming Unsaturated Hydrocarbons – Alkenes and Alkynes Rules for Naming Alkenes and Alkynes Alkenes contain at least one carbon to carbon double bond The suffix used is –ene Alkynes ... number of carbon atom-alkyl group attached(number of carbon atom-alkyl group attached- etc ) name of parent compound If there are several different alkyl groups attached to the parent chain, name them...

Ngày tải lên: 14/02/2014, 08:20

... such as an exhaust flame arrestor, removed 1156 7.0 Reagents and Standards 7.1 Two gas mixtures are required for instrument calibration and performance evaluation: 7.1.1 Zero Gas Air, less than ... EPA 600/2-81-110 Health Publication September 1981 Handbook of Hazardous Materials: Alliance of American Insurers Fire, Safety, Schaumberg, IL 1983 17.0 Tables, Diagrams, Flowcharts, and Validation ... Also, place the probe at the interface of the packing gland take-up flange seat and sample the periphery In addition, survey valve housings of multipart assembly at the surface of all interfaces...

Ngày tải lên: 14/02/2014, 08:20

... Belgium, France and Germany 11 12 Western Australia East Denmark Torino, Italy Southern Ontario, Canada Germany, France, Belgium Sweden San Francisco, USA Alberta, Canada Connecticut, USA South Health ... lentigo maligna melanoma; M, melanoma; MM, malignant melanoma; NM, nodular melanoma; NR, not reported; SSM, superficial spreading melanoma 27 Exposure to Artificial UV Radiation and Skin Cancer Table ... (Honigsmann, 2001) Narrow-band UVB is thought to be more effective than broadband UVB and almost as effective as PUVA in the treatment of psoriasis, and it may become a safer alternative to PUVA for...

Ngày tải lên: 14/02/2014, 21:20