two fiber solid phase microextraction for the analysis of volatile aroma compounds in cooked pork
Liquid phase microextraction for the determination of acidic drugs and beta blockers in water samples
... (acceptor phase) present in the lumen of hollow fiber, resulting in twophase LPME where analytes are finally extracted into the organic phase The extraction process of the two- phase LPME for analyte ... and Ms Wu Jingming for their help during the course of this project Special thanks to Xiaofeng for her insight to the project; Junie for proofreading this thesis; Elaine and Debbie for their friendship ... organic phase immobilized within the pores of the hollow fiber In the second step, the analytes are back-extracted into another aqueous phase held inside the lumen of the hollow fiber For analyte...
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Báo cáo toán học: " Solid-phase microextraction for bioconcentration studies according to OECD TG 305" pdf
... internal standardization, ageing of the SPME fiber is challenging, as is the variation of the MS performance Since a correction method for routine analysis is missing for MS, the alternative is to measure ... concentrations of the test substance They are then transferred to a medium free of the test substance for the depuration phase The concentration of the test substance in the fish is followed through both phases ... contamination [4] The principle of SPME is the partitioning of analytes from the sample to a coated fiber in the course of an equilibration This process is highly dependent on the characteristics of...
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Hollow fiber protected microextraction for the determination of pollutants in complex matrices
... into the hollow fiber These two steps were performed in n-nonane For solvent impregnation, the fiber was dipped with n-nonane for 10s The solvent entered through the pores of the fiber into the ... possibly because the fraction of the organic solvent which is immobilized in the pores of the hollow fiber is not available for further analysis; only the fraction present in the fiber channel may ... to convert solid sample to a liquid form and permits the direct use of solid phase extraction materials in the analysis of solid samples 1.2 Scope of our project The main objectives of this work...
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Tài liệu Báo cáo khoa học: A systems biology approach for the analysis of carbohydrate dynamics during acclimation to low temperature in Arabidopsis thaliana doc
... successful metabolic engineering of freezing tolerance in plants should include such an analysis of the dynamics of metabolism to gain comprehensive information about the effects of individual overexpression ... measure of how exposure to °C in uenced the process of photosynthesis, gas exchange of plants was measured by infrared gas analysis Measurements were performed during the first h 508 of the light phase, ... uptake per hour Data points were spline-interpolated to obtain timecontinuous information on net photosynthesis during the whole period of cold exposure The rate of raffinose synthesis, rSuc fi Raf,...
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TECHNIQUES FOR THE ANALYSIS OF ORGANIC CHEMECALS BY INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (ICP-MS) pptx
... and, in the case of the sample uptake tubing, care must also be taken to avoid contamination of the sample through contact with the tubing material For routine analysis of organic solvents, the ... Removal of carbon The presence of high levels of organic solvent in the sample aerosol can lead to deposition of carbon (soot) on the sampling cone, eventually leading to clogging of the cone ... droplets into the plasma Typically, a 20% oxygen in argon is used, rather than pure oxygen, avoiding the use of highly flammable or explosive gases in the laboratory The oxygen is added either in the...
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Báo cáo lâm nghiệp: "An approach for the analysis of vegetation spectra using non-linear mixed modeling of truncated power spectra" pdf
... data mining and colinearity, the approach should also reduce the dimensions of the data with a minimum of information loss It must accomplish this reduction without losing the ability to interpret ... to the variance of a spectra The choice of r – degrees of freedom in the numerator of the F-ratio test instead of was adopted to keep the experiment-wide error rate at 0.05 or better [38] The ... i ) is the estimated variance-covariance matrix of the fixed parameter vector The probability of obtaining a larger T2 under the null hypothesis of equality was obtained from the Hotelling distribution...
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Báo cáo lâm nghiệp: "of morphological characters and molecular markers for the analysis of hybridization in sessile and pedunculate oak" pps
... means of the comparison of the RAPD marker frequencies of a subsampling of these progenies and of the adult population Analysis of the morphological characters MATERIALS AND METHODS Sampling The ... the individuals and all the characters were included in the analysis (DFAa) Second, the individuals of the groups ses/ses and ped/ped were considered as principal points, and individuals of the ... pedunculate oak The progenies were two tetmoy which, in classified in the two groups as it was expected knowing the two species of their maternal parent tree, except two seedlings of the family 396...
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Báo cáo y học: "In vitro model for the analysis of synovial fibroblast-mediated degradation of intact cartilage" pptx
... embedded in the preformed cylinder and pre-cultured for two days (e) The SFB suspension was then applied and (f) left for three hours for settling and initial adherence of the SFB on the cartilage ... potent inductors of aggrecanase activity in both cases, underlining the key role of these cytokines in proteoglycan depletion On the other hand, the clearly increased aggrecan activity in co-cultures ... types in an experimental setting which reflects prominent features of joint destruction in RA In the long run, the system may allow the testing/screening of the molecular basis and efficacy of new...
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Báo cáo y học: "Reliability of computerized image analysis for the evaluation of serial synovial biopsies in randomized controlled trials in rheumatoid arthritis" pps
... changes in secreted proteins, such as cytokines and chemokines Conclusion In conclusion, the findings of the present study show the reliability of ST analysis using a DIA system for the evaluation of ... out of the 10 patients in the prednisolone group responded versus none of the nine patients in the placebo group To determine whether the same observer identified the same differences in the ... levels regarding the detection of stained antigen, nuclear staining and background staining After the analysis, all observers independently calculated the mean change in the total number of positive...
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báo cáo khoa học: "Numerical techniques for the analysis of polygenes sampled from natural populations" ppsx
... placement of strain 10 In the initial analysis (figure A), strain 10 was depicted as the most divergent strain in the second cluster and was one of the strains in l which the frequency of A was 0.75 In ... most 1.15 Principal coordinates analysis in another way of looking at the relationship among strains The results are summarized in the plot in figure Two axes account for much of the variation ... test the degree of segregation in a single isofemale line, several single-pair matings are made between a standard genetic strain and the isofemale strain For example, 25 single-pair crosses of...
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báo cáo khoa học: " High resolution melting analysis for the detection of EMS induced mutations in wheat SbeIIa genes" doc
... SBEIIa-D(A201T) the amino acid change induced by the EMS treatment is located in the region of the N-terminal domain of the glycogen branching enzyme family, reported to be essential for the size of the ... caused the loss of two of the seven amino acids involved in the binding and catalytic activity in normal SBEIIa protein, respectively Arg465 and Asp467 Analysis of SBEIIa-transcripts in the knock ... product showed the inclusion of the intron V, whereas the smaller one was found to contain a deletion of the first seven nucleotides of exon VI The presence of the intron V in the longer transcript...
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Báo cáo y học: "A novel human ex vivo model for the analysis of molecular events during lung cancer chemotherapy" pptx
... in the presence or absence of the individual chemotherapeutic agents including carboplatin, vinorelbine or gemcitabine These cytotoxic drugs are widely used for treatment of human NCSCL carcinomas ... assay using 2-photon microscopy in two separate experiments To analyze the effects of conventional chemotherapy in STST, each of the chemotherapeutic agents including carboplatin, vinorelbine and ... was involved in the design of the study, evaluation of the results and covered the clinical part EV was involved in the design of the study and histomorphological evaluation TG conceived the...
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Báo cáo y học: "ChIPOTle: a user-friendly tool for the analysis of ChIP-chip data" docx
... event, and none of the noise, in a single window Therefore, in most ChIP-chip experiments the window size should be adjusted to approximately the average shear size of the chromatin The average shear ... whereas the windows with the highest average contain only two elements (A and B) In this case, the center of the window with the highest P value is located about 80 bases from the actual binding ... variance equal to the variance of a single log ratio divided by the number of elements in the window Thus, the nominal P value for a window with average ratio w can be calculated using the standard...
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Báo cáo y học: "Statistical methods and software for the analysis of highthroughput reverse genetic assays using flow cytometry readouts" pps
... the antibody detected the incorporation of the thymidine analog BrdU into the replicated DNA An antibody specific for the activated form of the caspase-3 apoptosis regulator was employed in the ... the main prerequisite is a uniform, quantitative and comparable analysis of the raw data in order to integrate efficiently the information collected Analyzing and managing the vast amount of data ... details of which can be displayed on demand by hyperlinking them to the corresponding well icons in the plate plot The reader is directed to the online complement [32] for an interactive example Using...
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Using biological networks and gene expression profiles for the analysis of diseases
... of genes from a set S within the sorted list (B) Plot finding; it is computed by comparing of the running sum for S in the data set, including the location of the maximum null distributions for ... direct-group methods The principle behind selecting these small subnetworks is crucial to the biological interpretation of the results In addition, the scoring of subnetworks for statistical significance ... microarray and the number of ways of sampling (n − k) non-DEGs in the pathway from (N − K) non-DEGs in the microarray, and the denominator is the number of ways of sampling n genes in the pathway from...
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Development of methods to improve sensitivity and portability of capillary electrophoresis for the analysis of stabilizers and drugs 1
... method for the studies of many groups of compounds The improvement of sensitivity and the miniaturization of CE technique are two major trends of capillary electrophoresis which have gain more ... The usefulness of the method was demonstrated by detecting the major components in aminoglycoside antibiotic mixtures Gentamicin was separated into several peaks in 15 minutes, and neomycin into ... mode and the xiv modified one However, further enhancement of the stacking efficiency in the modified mode rested on the relative stability of the displacer-carrier complex to that of the solute-carrier...
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Development of methods to improve sensitivity and portability of capillary electrophoresis for the analysis of stabilizers and drugs 2
... siphoning injection and electrokinetic injection [6] In pressure injection, the inlet end of the capillary is immersed in the sample and the other end in the buffer Sample is introduced by either ... on the siphoning of sample into the capillary by elevating the inlet end of the capillary relative to the outlet end These two injection methods can be generalized as hydrodynamic injection The ... (gentamicin and neomycin) and a conditional essential element (carnitine) The main challenge in the analysis of gentamicin was the separation of the minor components, as well as their enantiomers These...
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An investigation into the use of gaussian processes for the analysis of microarray data
... method, i.e the outputs of the training examples are known and the purpose is to predict the output of new example In most of the cases, the outputs are either of two classes Hence, the task is ... measurement of the data in term of its distribution The value of the score is high if the two means of the classes are very different and the data of each class are crowded near the mean of the data ... (2000), In the thesis, we will use (2.1) 2.2 Information Gain Information gain is a filter method that is based on entropy (information theory) Entropy is a measurement of uncertainty in a system The...
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Capillary and microchip electrophoresis for the analysis of small biomolecules
... raise the buffer’s viscosity and thereby lowering the strength of the EOF The EOF, thus, determines the times at which the charged compounds migrate out When a strong EOF is generated in normal ... extraction of an endogenous nucleoside, adenosine, was investigated The extraction served to aid in improving the detection of adenosine via pre-concentrating the adenosine in a small volume of extractant ... from soft lithography lies in that the polymer is partially cured using UV light before removing it from the template The final product is then obtained with complete curing against another partially...
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QuEChERS A Mini-Multiresidue Method for the Analysis of Pesticide Residues in Low-Fat Products
... employ the internal standard at the end of the procedure (to an aliquot of the final extract) assuming the volume of the organic phase as being exactly 10 mL It should be furthermore noted that the ... protected by delaying the hydrogen flow into the NPD during the first minutes of a run • If large volume injection cannot be performed and the desired detection limits of the compounds of interest cannot ... lost The extent of losses depends on the amount of lipids in the sample as well as on the polarity of the analytes with the most non-polar ones showing the highest losses In the presence of elevated...
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