21—determination of volatile organiccompound leaks

... practices and determine the applicability of regulatory limitations prior to performing this test method 5.2 Hazardous Pollutants Several of the compounds, leaks of which may be determined by this method, ... regulation reporting requirements Examples of the application of this general technique to specific equipment types are: 8.3.1.1 Valves The most common source of leaks from valves is the seal between ... concentration 3.2 Calibration precision means the degree of agreement between measurements of the same known value, expressed as the relative percentage of the average difference between the meter readings...

Ngày tải lên: 14/02/2014, 08:20

... the determination of the composition or concentration of fragrance components in products 1.4 The term “Executive Officer” as used in this document means the Executive Officer of the Air Resources ... analysis of samples to determine the weight percent of total volatile material, using US EPA Reference Methods 24/24A, ASTM D 2369-01 3.3.2 Determination of sample water content For determination of ... fraction of non-exempted volatile 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...

Ngày tải lên: 14/03/2014, 20:20

... ADC of DM of test ingredient (%) = (ADC of DM of the test diet - 0.7 x ADC of DM of the reference diet)/0.3 ADC of nutrient of test ingredient (%) = [(nutrient in test diet x nutrient ADC of the ... quality of cassava meal sources between studies 3.3 The digestibility of ash The digestibility of ash (or crude ash) of three plant-ingredients is reported in table The digestibility of ash of rice ... ELAN project of the Commission Universitaire pour le Developpement of Belgium for funding this research REFERENCES Association of Official Analytical Chemists (1995) Official Methods of analysis,...

Ngày tải lên: 28/08/2013, 09:14

... the Examination of Water Occurrence of EDTA in river water samples from three regions of Japan was examined EDTA was detected in ten of thirteen river water samples A high level of EDTA was observed ... hand, a standard stock solution of CyDTA was prepared by dissolving 0.01 g of trans-1, 2-cyclohexanediaminetetraacetic in 100 mL of M sodium hydroxide Extraction of EDTA from water samples was ... mL methanol and mL of Milli-Q water, respectively Extraction of water samples was carried out at a flow rate of 10mL/min After extraction, cartridges were rinsed with 3mL of Milli-Q water and...

Ngày tải lên: 05/09/2013, 10:15

... provisions of this part of IEC 60076 For dated references, subsequent amendments to, or revisions of, any of these publications not apply However, parties to agreements based on this part of IEC ... the presence of sound It is expressed in pascals 3.2 sound pressure level, L p ten times the logarithm to the base 10 of the ratio of the square of the sound pressure to the square of the reference ... object The magnitude of K depends principally on the ratio of the sound absorption area of the test room, A, to the area of the measurement surface, S The calculated magnitude of K does not depend...

Ngày tải lên: 25/12/2013, 10:36

... CPΠ-68-01 Proceeding of the 14th Conference, University of Mining and Geology, Hanoi, 17th November (2004) 50 [7] Ha Van Tan (Chief Ed.), Archaeology of Viet Nam, The Publisher of Social Science, ... three counting The annual dose of beta (mGy/yr) was evaluated from: Dβ = 2,22.10-3.Cβ and that of gamma (mGy/yr) from: Dγ = 0.1752.Iγ, where Cβ is the specify activity of beta (Bq/kg), and (Iγ) is ... method for evaluation of the paleodose The paleodose P that the sample has received during antiquity is usually greater than Q because of the pre-dose effects [1,2] The evaluation of this correction...

Ngày tải lên: 13/02/2014, 04:20

... Two natural sources of benzene are volcanoes and forest fires Benzene is a natural part of crude oil, gasoline, and cigarette smoke Benzene is one of the major components of JP-8 fuel Industry ... moderate levels of trichloroethylene can get enlarged livers, and high levels of exposure can cause liver and kidney damage Studies of people exposed over long periods to high levels of trichloroethylene ... oil, gas, and coal, and from discharges of ethylbenzene from factories Ethylbenzene gets into the soil by spills of gasoline or other fuels and poor disposal of industrial and household wastes People...

Ngày tải lên: 14/02/2014, 03:20

... fragment of the ligand of the X-ray structure (RCSB PDB entry 1SM3) After small manual corrections, the ligands were docked into the binding site of SM3 using the FLEXIDOCK module of the SYBYL software ... correlation times of these proton pairs The lower three diagrams show examples of build-ups of structurally relevant NOE contacts site of SM3 is shown in Fig 5B For comparison of X-ray and NMR ... to about 36% of the interaction of the full peptide with the binding cavity of SM3 The sizes of the surfaces were determined using distances between ligand ˚ atoms and protein atoms of less than...

Ngày tải lên: 21/02/2014, 15:20

... ADC of DM of test ingredient (%) = (ADC of DM of the test diet - 0.7 x ADC of DM of the reference diet)/0.3 ADC of nutrient of test ingredient (%) = [(nutrient in test diet x nutrient ADC of the ... quality of cassava meal sources between studies 3.3 The digestibility of ash The digestibility of ash (or crude ash) of three plant-ingredients is reported in table The digestibility of ash of rice ... ELAN project of the Commission Universitaire pour le Developpement of Belgium for funding this research REFERENCES Association of Official Analytical Chemists (1995) Official Methods of analysis,...

Ngày tải lên: 25/02/2014, 10:20

... Analysis of the kinetics of proteolysis of Mt- and Ec-GluRS Fig S9 Minimal models of the proteolytic events leading to fragments M1M5 of Mt-GluRS and E1-E3 of Ec-GluRS Fig S10 DLS analysis of GluRS ... initial velocity of reactions that contained xed levels of the inhibitor (I), varying concentration of one of the substrates and constant concentration of others After inspection of the Dixon or ... design of specic inhibitors Analysis of the M tuberculosis genome sequence led to the identication of one ORF encoding a putative GluRS (Rv2992c, 1473 bp) Upstream of Rv2992c the sequences of one...

Ngày tải lên: 07/03/2014, 03:20

... concentration of increased, the uorescence intensity of the system also increased slightly We therefore used 2.00 mL of 2.00 ã 10)4 molặL)1 metallobridged bis(bCD)s Inuence of reaction time The effect of ... intensity Inuence of the concentration of metallobridged bis(b-CD)s Relative fluorescence intensity (a.u.) Inuence of pH 7.00 8.00 (105molãL1) Fig Inuence of the concentration of on uorescence ... titration of copper (II) was also performed to establish the coordination stoichiometry of complex We dissolved 1.508 g of complex in 50 mL of ultra-pure water, and added 25.00 mL of the complex...

Ngày tải lên: 07/03/2014, 05:20

... weight of softwoods, 1530% of hardwoods and up to 30% of annual graminaceous plants [7,8] Endo-1,4-b-xylanases (EC 3.2.1.8) are O-glycoside hydrolases that catalyze a random hydrolysis of internal ... Ir Number of observations Number of unique reections Temperature (K) Rfactor (%) Rfree (%) Rmsd bond lengths (A) Rmsd bond angles () Number of all atoms Number of protein atoms Number of waters ... the absence of the dimeric form of CTX, as the heterodimer was present in the case of TRX II Observation of noncovalent proteininhibitor complexes The formation of noncovalent proteininhibitor...

Ngày tải lên: 07/03/2014, 17:20

... Statement of typical rates of consumption of chemicals, a description of the physical and chemical nature of wastes, and rates of waste production; concentrates, residues, etc.; Definition of the ... the design of the PSTP shall include a sufficient range of feedwater quality to permit verification of the statement of performance objectives 3.2 Equipment Description Description of the equipment ... by a statistical analysis of the data An example of a satisfactory statement of performance objectives would be: “This system is capable of reducing the concentration of 1,1,2-trichloroethylene...

Ngày tải lên: 14/03/2014, 19:20

... (pollutant variety, complexity of ecosystems and geology) • Efficient risk assessments are difficult to be carried out in case of the presence on site of a multitude of pollutants, pollutant fractions ... • Reuse of contaminated soil material is not systematically taken into consideration b) In-Situ/On-Site Duration of clean-up procedures is often too long • Combination and optimisation of different ... remediation technologies are too often left aside due to remaining uncertainties on their efficiency • There is a lack of experience in the evaluation of the efficiency of in-situ bioremediation technologies...

Ngày tải lên: 15/03/2014, 23:56

... Redistribution of Pb and Cu in the presence of humic acid was demonstrated The selectivity of the reagents was insufficient to warrant interpretation of results in terms of a specific origin of a metal ... implications (e.g., during dredging operations) of land disposal of waste material, of acid precipitation, of redox changes in subsoil, and of ingestion of polluted urban dust, can be qualitatively ... the use of an aqua regia digestion of the residue after the three steps of the extraction procedure for comparison with an aqua regia digestion of the original material This approach is often referred...

Ngày tải lên: 15/03/2014, 23:56

... molecular mass determination of PPL2 (A) MALDI-TOF mass determination of native PPL2 purified by affinity chromatography as illustrated in the insert Insert: the fraction of a Parkia platycephala seed ... possible chitinase activity of PPL2 was investigated by quantitative GC determination of the amount of GlcNac released using chitin as substrate PPL2 released lg of GlcNacÆh)1Æ(mg protein))1 ... amplified from genomic DNA of Parkia platycephala seedlings The size of the amplified genomic DNA was identical to that of the cDNA, indicating that the PPL2 gene was devoid of introns, as observed...

Ngày tải lên: 16/03/2014, 13:20

... cent loss from the point of view of inclusive part of speech Rule A, it will be remembered, requires the removal of affixes from the kernel of the word If this kernelizing of the word is omitted, ... about 90-95 per cent of the cases from the point of view of inclusive part of speech, with something less than per cent variation, depending on whether part of speech implications of affixes are used ... adequate to maintain the goal of 95 per cent accuracy DETERMINATION OF PARTS OF SPEECH 55 In investigating exceptions to Rule C, adverbs with additional parts of speech of PR, CJ, PV, IJ, PN, and...

Ngày tải lên: 16/03/2014, 19:20

... P.D Khue, B.V Loat / VNU Journal of Science, Mathematics - Physics 24 (2008) 81-87 elsewhere The purpose of the present work was to investigate the energy spectrum of bremsstrahlung photons emitted ... main characteristics of the nuclear reactions investigated and decay data of the reaction products are presented in Table 1[9] Fig Experiment arrangement for the investigation of Bremsstrahlung ... )[1 − exp( − λ t c )] where: No is the number of target nuclei; ε is the photopeak efficiency of the detector; Iγ is the branching ratio or intensity of the gamma ray ; λ is the decay constant;...

Ngày tải lên: 22/03/2014, 11:20

... acetone at a concentration of 500 µg/mL of each This solution is used in the preparation of the calibration solutions Dilute a portion of this solution by 10 to a concentration of 50 µg/mL and use this ... abundance of the quantitation ion of the analyte Ais = integrated abundance of the quantitation ion internal standard Qx = quantity of analyte injected in ng or concentration units Qis = quantity of ... concentration of analyte or surrogate 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...

Ngày tải lên: 22/03/2014, 14:20