chemical analysis surfactant composition using imaging time of flight secondary ion mass spectrometry
Báo cáo khoa học: A region within the C-terminal domain of Ure2p is shown to interact with the molecular chaperone Ssa1p by the use of cross-linkers and mass spectrometry doc
... Fig Detection of chymotryptic peptides modified by nondeuterated and deuterated cross-linkers by MALDI-TOF-TOF mass spectrometry A selection of mass spectra illustrates how the comparison of chymotryptic ... (A) MALDI-TOF-TOF mass spectrum of the light (d0) and heavy (d4) precursor ions presenting a mass difference of 4.024 Da (indicated by the curved arrow) (B) Fragmentation mass spectrum of the double-charged ... acid and stored at )20 °C until MS analysis High mass MALDI-TOF MS High -mass MALDI-TOF mass spectra of the intact protein complexes were obtained using a MALDI-TOF mass spectrometer (Voyager DE STR;...
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Tài liệu Real-time, on-line monitoring of organic chemical reactions using extractive electrospray ionization tandem mass spectrometry pdf
... Monitoring of organic chemical reactions using EESI-MS 2997 Figure Collision-induced dissociation spectra of some [MþH]þ ions of products and intermediates from the 4-DMAP-catalyzed acetylation reaction, ... real -time, on-line monitoring of chemical reactions in industry, providing instant data for the feedback loop to correct possible reaction deviations In addition to real -time monitoring, tandem mass ... Monitoring of organic chemical reactions using EESI-MS Figure Mass spectra of the Michael addition reaction recorded at 20, 60 and 300 min, respectively Inserts: molecular structures of PEA, PEAP...
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Báo cáo sinh học: " Development of an improved microneutralization assay for respiratory syncytial virus by automated plaque counting using imaging analysis" pdf
... necessary Calculation of antibody titer Titer was calculated from the average of duplicate sample wells by extrapolating the inverse dilution of serum that produced a 60% reduction of virus according ... methods of clinical measurement Lancet :307-310 1986 Feb X = (a-b)(e-c)/(c-d) + a where, a = log10 of dilution above the 60% reduction point, b = log10 of dilution below the 60% reduction point, ... vaccine The development of a vaccine will require intensive evaluation of the immune response, which can be expedited by utilizing automation The neutralization assay is one of the most trusted and...
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báo cáo hóa học:" Development of an improved microneutralization assay for respiratory syncytial virus by automated plaque counting using imaging analysis" pptx
... necessary Calculation of antibody titer Titer was calculated from the average of duplicate sample wells by extrapolating the inverse dilution of serum that produced a 60% reduction of virus according ... methods of clinical measurement Lancet :307-310 1986 Feb X = (a-b)(e-c)/(c-d) + a where, a = log10 of dilution above the 60% reduction point, b = log10 of dilution below the 60% reduction point, ... vaccine The development of a vaccine will require intensive evaluation of the immune response, which can be expedited by utilizing automation The neutralization assay is one of the most trusted and...
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CHEMICAL ANALYSIS OF WATER AND WASTEWATER
... the production of ions by an electrical discharge or chemical process, followed by separation based on the charge-to -mass ratio and measurement of the ions produced The output of a mass spectrometer ... adsorption Oxygen Water quality Titration, electrochemical Oxygen demand (biochemical) Water quality and pollution Microbiological-titration Water quality and pollution Chemical oxidationtitration ... elemental state, forming a cloud of atoms These atoms absorb a fraction of radiation in the flame The fraction of radiation absorbed increases with the concentration of the sought-for element in...
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Tài liệu METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER ppt
... The width of the retention time window used to make identifications should be based upon measurements of actual retention time variations of standards over the course of a day Three times the ... should be based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound can be used to ... comparing the retention times of the peaks in the sample chromatogram with those of the peaks in standard chromatograms The width of the retention time window used to make identifications should be...
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Tài liệu METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER doc
... should be based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound can be used to ... comparing the retention times of the peaks in the sample chromatogram with those of the peaks in standard chromatograms The width of the retention time window used to make identifications should be ... addition of 10 µL of this standard to 5.0 mL of sample or calibration standard would be equivalent to 30 µg/L 7.4.3 Analyze each calibration standard according to Section 10, adding 10 µL of internal...
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Tài liệu Báo cáo khóa học: Quantitative analysis, using MALDI-TOF mass spectrometry, of the N-terminal hydrolysis and cyclization reactions of the activation 2 process of onconase pdf
... their intensities vary with time, allowing the fraction of each species to be determined at any time Characterization of the hydrolysis reaction Met1 removal The election of the buffer system was ... Characterization of the intramolecular cyclization reaction Pyroglutamyl formation From the set of data described in the preceding section, it was also possible to monitor the cyclization reaction as ... function of guanidinium chloride concentration and pH, by calculating the fraction of PyrONC (M23L) or cyclization This is defined as the ratio Ó FEBS 2004 MS characterization of onconase activation...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER pot
... 15-40% of Mass 95 30-60% of Mass 95 Base Peak, 100% Relative Abundance 5-9% of Mass 95 50% of Mass 95 5-9% of Mass 174 >95% but 101% of Mass 174 5-9% of Mass 176 Table ... one scan of each other 12.1.2 The retention time must fall within ±30 seconds of the retention time of the authentic compound 12.1.3 The relative peak heights of the three characteristic masses ... the solutions at 4°C in Teflon-sealed glass containers with a minimum of headspace The solutions should be checked frequently for stability The addition of 10 µL of this solution of mL of sample...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 604—PHENOLS docx
... should be based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound may be used to ... seven days of collection and completely analyzed within 40 days of extraction.2 10 Sample Extraction 10.1 Mark the water meniscus on the side of sample bottle for later determination of sample ... comparing the retention times of the peaks in the sample chromatogram with those of the peaks in standard chromatograms The width of the retention time window used to make identifications should be...
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A Guide to the Analysis of Fish Marketing Systems Using a Combination of Sub-sector Analysis and the Sustainable Livelihoods Approach potx
... or regions, as they are often location-specific An example is provided in Appendix of how the analysis of marketing margins was conducted as part of the Bangladesh study The investigation of technical ... recommendations and project interventions users of research findings if they are carrying out project interventions targeting the poor The identification of points of leverage is advocated as part of ... availability of market information and means of communication used, infrastructure, changing consumption patterns, performance of marketing system versus equity considerations G G Information on the...
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CHEMICAL ANALYSIS OF ANTIBIOTIC RESIDUES IN FOOD pptx
... when quantifying residues of the compound, and the form of ionization such as protonated ions or adduct ions when using electrospray ionization The molecular formulas of the antimicrobial agents ... Linear Ion Trap, 209 6.4.3.5 Time- of- Flight, 210 6.4.3.6 Orbitrap, 212 6.4.4 Other Advanced Mass Spectrometric Techniques, 214 6.4.4.1 Ion Mobility Spectrometry, 214 6.4.4.2 Ambient Mass Spectrometry, ... the relationship between the dose of drug administered and the concentration of non-protein-bound drug at the site of action PD describes the relationship between the concentration of non-protein-bound...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 605—BENZIDINES pdf
... should be based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound can be used to ... comparing the retention times of the peaks in the sample chromatogram with those of the peaks in standard chromatograms The width of the retention time window used to make identifications should be ... peak response using the calibration curve or calibration factor determined in Section 7.2.2 The concentration in the sample can be calculated from Equation Equation where: A = Amount of material...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 611—HALOETHERS potx
... should be based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound can be used to ... seven days of collection and completely analyzed within 40 days of extraction.2 10 Sample Extraction 10.1 Mark the water meniscus on the side of the sample bottle for later determination of sample ... comparing the retention times of the peaks in the sample chromatogram with those of the peaks in standard chromatograms The width of the retention time window used to make identifications should be...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 607—NITROSAMINES docx
... should be based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound can be used to ... expected range of concentrations found in real samples or should define the working range of the detector 7.3.2 Using injections of 2-5 µL, analyze each calibration standard according to Section 12 and ... comparing the retention times of the peaks in the sample chromatogram with those of the peaks in standard chromatograms The width of the retention time window used to make identifications should be...
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METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER doc
... percent of Mass 198 Less than percent of Mass 198 Base peak, 100 percent relative abundance 5-9 percent of Mass 198 10-30 percent of Mass 198 Greater than percent of Mass 198 Present but less than Mass ... Conditions, Method Detection Limits, and Characteristic Masses for Base/Neutral Extractables Method Characteristic masses Retendetection Electron impact Chemical ionization Parameter tion time ... Conditions, Method Detection Limits, and Characteristic Masses for Base/Neutral Extractables Method Characteristic masses Retendetection Electron impact Chemical ionization Parameter tion time...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER ppt
... Department of Transportation regulations 9.4 All samples must be extracted within seven days of collection and completely analyzed within 40 days of extraction.2 10 Sample Extraction CAUTION: When using ... yield a definitive conclusion, the use of high resolution mass spectrometry is suggested 13 Calculations 13.1 Calculate the concentration of 2,3,7,8-TCDD in the sample using the response factor ... Decontamination—For personal decontamination, use any mild soap with plenty of scrubbing action For decontamination of glassware, tools, and surfaces, Chlorothene NU Solvent (Trademark of the Dow Chemical...
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Báo cáo toán học: "Chemical composition and antibacterial activity of the essential oils from Launaea resedifolia L." docx
... parameters were as follows: ionization potential, 70 eV; ionization current, A; ion source temperature, 200°C; resolution, 1000 2.3 Identification of components Identification of oil components was ... effect of the essential oils of L resedifolia There no reports on the essential oils of the species of the genus launaea except that reported by Cheriti et al [6] In continuation of our phytochemical ... 0.01 mL of each dilution onto a filter paper disc [17, 18] Dilutions of the oil within a concentration range of 10–420 g/mL were also carried out MIC was defined as the lowest concentration that...
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