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quantification in xrf analysis of intermediate thickness samples

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 6

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 6

Cao đẳng - Đại học

... ultrapure water, drinking water, rain water, river water and seawater under various pH and irradiation sources (sunlight, darkness, indoor incandescent lighting and artificial UV lighting) Hydrolysis ... pH-dependent irrespective of the type of water matrix Light intensity could prompt degradation significantly under mild alkaline conditions, while its influence was minor at higher pH (pH > 9) ... conjugate of 2-isopropoxyphenol occurred in all tested biological samples under the applied MAE conditions and led to low recoveries The stability of propoxur under microwave irradiation was maintained...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 5

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 5

Cao đẳng - Đại học

... power setting for the microwave heating This setting was proportional to the number of samples undergoing extraction during one run Furthermore, according to previous experience with MAE and intuition, ... follows: 20-ml of methanol, an optimum microwave heating temperature of 80 °C, and a 6-min of microwave heating Table 5-4 Variance analysis table in the OA (27) matrix for the optimization of MAE from ... within 1-2 minutes of microwave heating during the extraction An important point to note when employing the OAD procedure is that although some parameters (duration of extraction and volume of...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 4

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 4

Cao đẳng - Đại học

... increased to 200°C at a rate of 25°C/min, then maintained at 200°C for min; a second ramp 230°C at rate of 5°C/min, increased to 280°C at a rate of 20°C/min; The final temperature of 280°C was held for ... methanol 88 An interesting result observed from Fig 4-6 is that in the same solvent, the recovery increases in going from PAHs to PCBs, and then to triazines (i.e, increasing polarity of analyte) ... the recovery of PAHs, PCBs and triazines For example, the recoveries of triazines progressively improved with an increasing degree of moisture in the tested soil This can be explained by the high...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 3

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 3

Cao đẳng - Đại học

... degradation rates increase in the order of increasing pH (seawater [pH 7.8] or river water [pH 7.6] > drinking water [pH 7.03] > rain water [pH 4.2]) For example, the percentage of degradation in seawater ... Therefore, during the following investigation of propoxur degradation in real water samples, methanol was used to dissolve the final target compounds after preconcentration instead of water due ... aimed at monitoring the degradation kinetics of propoxur in water in order to obtain its chemical degradation curves and half lives For this purpose, ultrapure water samples containing 1.0 ng/µl...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 2

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 2

Cao đẳng - Đại học

... Polychlorinated biphenyls (PCB-1242 and PCB-1248) were purchased as individual standard stock solutions containing a nominal concentration of 100 µg/ml in methanol from Ultra-Scientific Atrazine (purity ... volume of spiking solutions into the natural water samples prepared above and ultrapure water All the samples were degassed by an ultrasonic bath before LC-MS analysis 2.3.2 Preparation of Soil Samples ... 60mesh sieve In order to remove possible traces of PAHs, PCBs, triazines, carbamates and other organic contaminants, 100 g of each of the soil sample was immersed in 200 ml 46 each of methanol,...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 1

Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 1

Cao đẳng - Đại học

... Table 1-3 Comparison of the boiling points of solvents in open and closed systems [64] Solvent Dichloromethane Boiling point (°C) in open system 39.8* Boiling point (°C) in closed system (175psi) ... molecular-mass determination for large proteins by means of ESI At present, APCI is commercially available and a growing interest in applications involving biological and environmental analysis In an APCI ... breakthrough in the development of coupling techniques was the introduction of the moving-belt interface (MB) in 1974 that, became the first commercial LC-MS interface [11] Subsequently, many interface...
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Luận văn english prepositions of place at, on, in an analysis of errors made by secondary school students

Luận văn english prepositions of place at, on, in an analysis of errors made by secondary school students

Khoa học xã hội

... errors in the learning process of English are inevitable The errors in using prepositions, especially the prepositions of place AT, ON, IN are not exceptional The teaching and learning of prepositions ... in language learning Secondly, to identify causes of learner's errors Finally, to obtain information on common difficulties in language learning, as an aid to teaching or in the preparation of ... source of L1 interference in producing L2 (Dulay et al, 1982) The first source is a lack of common knowledge and linguistic competence at a certain stage of their learning This often occurs in early...
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Tài liệu ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Essays in Microstructure in Honor of David K. Whitcomb Volume 3 ppt

Tài liệu ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Essays in Microstructure in Honor of David K. Whitcomb Volume 3 ppt

Kế toán - Kiểm toán

... International Journal of Finance, The Journal of Banking and Finance, The Journal of Finance, The Journal of Financial Economics, The Journal of Financial & Quantitative Analysis, The Journal of Industrial ... ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Essays in Microstructure in Honor of David K Whitcomb Volume This page intentionally left blank ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE ... contribution of microstructure can be seen in the advancement of our understanding of market efficiency In particular, we can now use intraday data to examine the speed of information incorporation into...
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Báo cáo khoa học:

Báo cáo khoa học: "PARSING VS. TEXT PROCESSING IN THE ANALYSIS OF DICTIONARY DEFINITIONS" pot

Báo cáo khoa học

... future of parsing in the analysis of dictionary definitions or of any other large text corpus lies in a simpler, less computationally intensive parsing technique In addition, a parser for definition ... most of the duplicate relational triples Finding relational triples by text processing As the performance statistics above show, parsing is painfully slow For the simple business of finding and ... }? warning } of danger (29) noun: Parsing, again Simple text processing, even without such lexical knowledge as parts of speech, is about as accurate as parsing in terms of correct vs incorrect...
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Báo cáo khoa học: In vitro analysis of the relationship between endonuclease and maturase activities in the bi-functional doc

Báo cáo khoa học: In vitro analysis of the relationship between endonuclease and maturase activities in the bi-functional doc

Báo cáo khoa học

... stringent concentration of KCl, there was a correlation between inhibition of endonuclease activity and inhibition of splicing activity indicating that RNA binding can be monitored by measuring ... and its binding affinity is not altered by the presence of DNA in the DNA binding site Interestingly, when nM RNA and 10 nM DNA were added simultaneously to a limiting amount of protein in TK8 buffer ... constant for the binding of DNA to protein kinetically and obtained a value of at least half this in TK8 buffer containing 10 mM MgCl2 [33] Therefore, given that the DNAÆprotein complex is more...
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ADVANCES IN QUANTITETIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 1 pdf

ADVANCES IN QUANTITETIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 1 pdf

Kế toán - Kiểm toán

... testing of this path diagram provides several interesting results regarding the use of non-financial data in the analyses of Internet firms Consistent with findings in Kozberg (2001), accounting ... Fung because intraindustry spillovers are presumably more direct and visible to investors than interindustry spillovers The insignificance of internal spillovers is also interesting, since it implies ... Therefore, the intensity of internal knowledge spillovers also implies a firm’s capability of internalizing the values of its knowledge and past experience in future research Finally, interindustry...
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ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 4 doc

ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 4 doc

Kế toán - Kiểm toán

... course of events The observations in the profitability range —0.20 to +0.20 were separated into 10 sub -samples, each covering a profitability range of 0.04 The observations in each of these sub -samples ... yt-\, the beginning year book value per share; and et is the noise term The models in Collins, Pincus, and Xie, (1999) are expressed in terms of earnings for the year and beginning of the year ... enquiries@stallionpress.com Printed in Singapore by World Scientific Printers (S) Pte Ltd Preface to Volume Advances in Quantitative Analysis of Finance and Accounting is an annual publication designed to disseminate...
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ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 5 potx

ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 5 potx

Kế toán - Kiểm toán

... ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND Accounting June 8, 2007 3:16 spi-b483 Advances in Quantitative Analysis of Finance and Accounting: Vol.5 Advances in Quantitative Analysis of Finance ... enquiries@stallionpress.com Printed in Singapore June 28, 2007 8:15 spi-b483 Advances in Quantitative Analysis of Finance and Accounting: Vol.5 Preface Advances in Quantitative Analysis of Finance and Accounting is ... spi-b483 Advances in Quantitative Analysis of Finance and Accounting: Vol.5 List of Contributors xv Chapter 12 Rajeeva Sinha Odette School of Business University of Windsor 401 Sunset Ave Windsor, Ontario,...
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ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 6 pot

ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume 6 pot

Kế toán - Kiểm toán

... ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING vOLUME 6741 tp.indd 2/1/08 9:14:26 AM This page intentionally left blank ADVANCES IN QUANTITATIVE ANALYSIS OF FINANCE AND ACCOUNTING Volume ... Advances in Quantitative Analysis of Finance and Accounting: Vol.6 viii Contents Chapter Chapter Determinants of Winner–Loser Effects in National Stock Markets Ming-Shiun Pan Earnings Management in ... 16:14 spi-b567 Advances in Quantitative Analysis of Finance and Accounting: Vol.6 xii List of Contributors Chapter Vijay Jog Professor of Finance Eric Sprott School of Business Carleton University...
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Báo cáo khoa học: In silico analysis of the adenylation domains of the freestanding enzymes belonging to the eucaryotic nonribosomal peptide synthetase-like family pot

Báo cáo khoa học: In silico analysis of the adenylation domains of the freestanding enzymes belonging to the eucaryotic nonribosomal peptide synthetase-like family pot

Báo cáo khoa học

... contains a redox cofactor binding site for either pyrroloquinoline quinone (PQQ) or NADPH In particular, AASDH, containing a PQQ binding domain, is supposed to be involved in lysine degradation ... while main chain atoms were maintained fixed, ˚ side chains of every residue contained in a sphere of A centered on the phosphate atom of the AMP were subjected to a gradually decreasing tethering ... the A domains of the aminoacyl adenylate-forming enzymes of the freestanding enzymes and those of the traditional NRPS systems In particular, how many sequences of freestanding A domains are known...
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Báo cáo y học:

Báo cáo y học: "Dissecting the determinants of depressive disorders outcome: an in depth analysis of two clinical cases" pot

Báo cáo khoa học

... criteria, in this case of a good response, were misleading Hereditary features In accordance to the principles of formal genetics, sharing a portion of genetic heritage increases the risk of being ... significant interpersonal relationships due to the fear of criticism and judgment; avoidance of interpersonal relationships if there is no certainty of being accepted; inhibition in interpersonal ... lack of energy, tiredness, thinking difficulty, impaired concentrating and making decisions, fear of the future, difficulties in relationships and social withdrawal She lived in an isolated setting,...
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Báo cáo khoa hoc:

Báo cáo khoa hoc:" Adaptive significance of amylase polymorphism in Drosophila. Analysis of the association between tissue-specific expression and specific activity in Amy or Amy genotypes F S of Drosophila subobscura" ppt

Báo cáo khoa học

... similarities in the protein structure, originate from changes in the polygenic complex of regulatory genes, examination of their variability is of importance a-Amylase in Drosophila, active in the ... group of F/F lines which is at least + SE below the mean (U 7.00, P < 0.05), as well as between the groups of lines of both genotypes within ± SE of the mean (U 24.00, P < 0.05) The analysis of intergroup ... systems in Drosophila (see [9]) The analysis of the enzyme activity represents a model for distinguishing between the effects of the structural and regulatory genes involved in the control of a...
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Báo cáo y học:

Báo cáo y học: "Computational challenges in the analysis of ancient DNA" ppsx

Báo cáo khoa học

... paradoxical result can be explained in the following way The chance of finding a seed-match and of producing a local alignment of significant similarity rises with the length of the fragment Longer fragments, ... Additional file 1) Therefore, requiring a minimum distance in bitscore between the best and second best hit is Page of 15 very effective in removing most of the remaining reads that would otherwise ... length of the shorter read including the 454 adapter sequence A read is added to an existing cluster if the same condition is met by any one of the sequences in the cluster (single-linkage clustering)...
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báo cáo khoa học:

báo cáo khoa học: " In vitro analysis of the cytotoxicity and the antimicrobial effect of four endodontic sealers" ppt

Báo cáo khoa học

... wall of each multiwell cylinder (16 mm diameter; Greiner Bio-One, Frickenhausen, Germany), thus covering only a small area of the well The amount of sealer was determined according to preliminary ... L-Glutamine and 100U/100 μg/ml Penicillin/Streptomycin (Invitrogen, Paisley, UK), incubated at 37°C, in a humidified atmosphere containing 5% CO , and a bidaily medium change To assess the interaction ... teeth before a bacterial infection develops, and to use a biocompatible sealing agent In case of an infection leading to pulp necrosis or of a bacterial contamination of the apical tissue, it...
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