the analysis of food volatiles using direct thermal desorption
Báo cáo lâm nghiệp: "An approach for the analysis of vegetation spectra using non-linear mixed modeling of truncated power spectra" pdf
Ngày tải lên :
08/08/2014, 01:22
... reflectance in the visible yet reduced reflectance in the NIR and SWIR regions of the spectrum Analysis of vegetation spectra 519 Figure Summary of F-ratio tests of significance of the variance of the ... approximation to the otherwise intractable log-likelihood function A program for the estimation of the parameters was written in MATHEMATICA® [61] since no major software package currently offers the Laplace ... which the test statistics exceeded Fr −1, at the 5% significance level were deemed to contribute significantly to the variance of a spectra The choice of r – degrees of freedom in the numerator of...
- 9
- 598
- 0
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
Ngày tải lên :
16/09/2015, 17:13
... underwent thermal degradation under the extraction conditions The results indicate that although carbamates tested in this study are thermally labile, there was little observable degradation under the ... optimize the MAE conditions The average recovery of the carbamates was above 94% with good reproducibility under optimum MAE conditions SFE was optimized by a two-level OAD procedure Recoveries of the ... maintained as neither evaporation losses nor propoxur decomposition was observed during the process The extracts of goldfish, tortoises and sea lettuce were stable and a 3-days delay prior to analysis...
- 3
- 291
- 0
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
Ngày tải lên :
16/09/2015, 17:13
... probably because of the loss of a 1-propene (C3H6) molecule, the other is the base peak at m/z 153 [M+H-57]+, which probably resulted from the neutral loss of a CH3NCO group MS studies of other carbamate ... Fig 5-4 shows the change in concentration of each of the analytes in the goldfish extracts with time From the figure, it can be seen that neither a decrease in the concentration of the extracts ... total of five degrees of freedom was required, and the OA (2 7) matrix was, therefore, chosen so as to have sufficient degrees of freedom for the assignment of the variables under consideration The...
- 22
- 279
- 0
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
Ngày tải lên :
16/09/2015, 17:13
... determined by the polarity of the extractant The recoveries of carbamates from soil were also dependent on the polarity of the extractant, and the protection afforded by the soil to the analytes ... (1:4) The percentage of thermal degradation 79 ranged from 10% to 100%, depending on the polarity of solvent Based on the results, some very interesting conclusions can be drawn: (1) The thermal ... The structures of the carbamates studied are shown in Fig 4-2 The extent of thermal degradation of each carbamate in different extractants under MAE conditions was determined in the absence of...
- 47
- 264
- 0
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
Ngày tải lên :
16/09/2015, 17:13
... application of LC-APCI-MS for the determination of carbamates: carbofuran and 3hydroxy-carbofuran, and the analysis of triazine herbicides in water [8] LC-ESI-MS has been also successfully applied for the ... logarithm of the percentage of the compound remaining is plotted against time (h-1) The half-life (t1/2) designates the time at which the pollutant concentration is equal to one-half the initial ... exposure The effects of matrix on the degradation behavior of target were also studied Results are presented in Fig 3-7, which shows the effect of irradiation time on the degradation 66 behavior of...
- 23
- 239
- 0
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
Ngày tải lên :
16/09/2015, 17:13
... prepared via the addition of standard stock solutions to the homogenized specimen (30 g) that was then left for hour to allow the spiked 48 solution to penetrate the material The samples were then immediately ... volume of spiking solutions into the soils To ensure that the analytes were well distributed, a reasonable amount of acetone was added to moisten the soil and careful agitation was performed These ... meet the fortification standards for recovery and analytical precision, a portion of each fish sample was added an appropriate volume of standard solution, thereby obtaining the required levels of...
- 7
- 284
- 0
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
Ngày tải lên :
16/09/2015, 17:13
... entering the MS [17] MB separates the condensed liquid-phase side of the LC from the high vacuum of the MS and uses a belt to transport the analytes from one to the other The mobile phase of the LC ... become one of most powerful techniques for the analysis of carbamates and their TPs because of their relatively high polarity, low volatility, and thermal instability that prevent direct analysis ... APPLICATIONS OF LC-MS FOR THE ANALYSIS OF TRACE AMOUNTS OF POLAR, LOW-VOLATILE, AND THERMALLY LABILE ORGANIC COMPOUNDS One of the most critical environmental issues that have emerged over the last...
- 43
- 425
- 0
A Guide to the Analysis of Fish Marketing Systems Using a Combination of Sub-sector Analysis and the Sustainable Livelihoods Approach potx
Ngày tải lên :
07/03/2014, 00:20
... failing to meet their objectives this may be because of lack of assets or that their aims are in conflict with those of other, more powerful, groups One of the key principles of the SLA is the attempt ... sub-sector Analysis of the structure of the commodity system usually focuses on the characteristics related to the Chapter number and size of firms in relation to the size of the market, the presence ... another area that is likely to be important in the economic context of the subsector analysis For example, one of the objectives of the Bangladesh study was to investigate the link between the...
- 95
- 645
- 0
Báo cáo Y học: The analysis of the fine specificity of celiac disease antibodies using tissue transglutaminase fragments pot
Ngày tải lên :
08/03/2014, 09:20
... lengths of the core domain either at the 5¢- or 3¢-terminus (tTG/8 to tTG/12) Fig Schematic drawing of the cloning of 12 different tTG regions Reference numbers of the amino acid residues at the ends ... residues at the ends of the cloned sequences are shown C-terminal end of the core and the nearby loop The results of the Western blotting are depicted in Fig Using His-probe, all the expressed tTG ... interpretation of the reactivity of cloned antibodies and patients’ sera The overall response of the cloned antibodies indicates that the recognized region is located in the core of tTG spanning...
- 7
- 506
- 0
Báo cáo vật lý: "The Potentiometric Analysis of Chloride Ion Using Modified Heterogeneous Chitosan Membranes" pdf
Ngày tải lên :
07/08/2014, 14:20
... was another factor that influenced the mobility of the ions to the membrane surface The smaller the ions the more easily they were in their mobility to the membrane surface than bulky ions The 1.0 ... the exchange sites Pot The selectivity of the membrane to some ions was given by the K A, B Pot value The higher the K A, B value examined, the higher the response of the Potential, mV electrode ... in the production of industrial chemicals, they are also useful in the production of fertilizers The source of environmental chlorides includes leaching from several types of rocks through weathering,...
- 10
- 306
- 0
Báo cáo sinh học: " The analysis of disease biomarker data using a mixed hidden Markov model (Open Access publication)" ppt
Ngày tải lên :
14/08/2014, 13:21
... Evaluation of the accuracy of the estimates The estimates ^ti ; r2 ; r2 ; r2 ; aị of the parameters lti ; r2 ; r2 ; r2 ; aị were l ^0 ^1 ^a ^ a computed, after burn-in, as the means of the posterior ... that the mixed HMM provides a good t to the data sets simulated in this study The advantages of the HMM over other approaches are the prediction of health or disease status, the reduction of conrmatory ... range of values for the simulated parameters Overall, estimates of means and variances were rather insensitive to the values of the corresponding simulated values but they were sensitive to the...
- 19
- 388
- 0
Báo cáo y học: "Statistical methods and software for the analysis of highthroughput reverse genetic assays using flow cytometry readouts" pps
Ngày tải lên :
14/08/2014, 17:22
... with the technical aspects of data import and management, and refer the interested reader to the documentation of the software package prada for a thorough discussion of these [19] Selection of ... for the different assays, each specifically measuring the phenotype of interest In the case of cell proliferation, the antibody detected the incorporation of the thymidine analog BrdU into the ... negative control The gradual nature of these types of responses supports the use of regression analysis Because the effect may deviate from linearity in the range of perturbations that we observe,...
- 12
- 424
- 0
Using biological networks and gene expression profiles for the analysis of diseases
Ngày tải lên :
09/09/2015, 10:15
... (2.14) The numerator of the eq.2.14 represents the number of ways of sampling k DEGs in the pathway from K observed DEGs in the microarray and the number of ways of sampling (n − k) non-DEGs in the ... depends on the correlation of the gene with the one of the two phenotypes We theref phenotype The enrichment score is the maximum deviation from Moreover, in the permutation test the FCS and ... profiling is the simultaneous measurement of the amount of mRNAs of all the genes, which are transcribed from the genome, in the cell At any moment, not all the genes are activated, resulting in the phenotypic...
- 147
- 703
- 0
The emergence of food-producing communities
Ngày tải lên :
01/11/2013, 07:20
... components of the economy at Birimi, a settlement close to the northern edge of the West African forest in modern Ghana This was an outlier of the Kintampo culture whose other sites, further south in the ... while others moved more quickly up the main waterways until, at about 1000 bc, they reached the eastern edge of the equatorial forest in the broad area of the great East African lakes There they ... fatal to cattle By the first half of the second millennium bc, cattle were herded close to the top of the Niger bend and on the southern shores of Lake Chad Shortly afterwards, the first strong archaeological...
- 31
- 346
- 0
A discourse anslysis of the linguistic features of the advertisements of food and drink in english versus vietnamese
Ngày tải lên :
26/11/2013, 13:27
... the syntactic and semantic features of advertisement language The readers and the writers of these kinds 1.4 SCOPE OF THE STUDY This study deals with discourse analysis of the syntactic and of ... of the proposition of the directive, apart from the affirmative form, the directives of the ads can have the negative form This syntactic form of directives can be used with the Commit -ment Modes ... derived from the interpretation of the speech of the product acts employed in the ads As regards the stylistic devices used in the advertisements of - The learners should be aware of the similarities...
- 13
- 1.5K
- 1
The analysis of theme and rheme in little house on the prairie = sự phân tích về đề ngữ và thuyết ngữ, thông qua truyện ngôi nhà nhỏ trên thảo nguyên
Ngày tải lên :
22/12/2013, 12:59
... Interpersonal Themes, on the other hand, reveal something of the attitude of the speaker or the writer And Textual Theme is the link between the clause contains that Theme and the rest of the discourse ... that of the Interrogatives is the Interrogative word and that of the Imperatives is the Imperative form of the verb And Rheme is the remainder of the message, and also the part in which the Theme ... not all about Theme and Rheme, although "The Analysis of Theme and Rheme in "Little House on the Prairie" is shown as the theme of the study Method of the Study - A great number of documents and...
- 101
- 1.5K
- 5
03 analysis of mechanical systems using interval computations applied to finite element methods o dessombz
Ngày tải lên :
12/01/2014, 21:45
... point of view, and the others often encounter convergence problems Moreover, only the mean value and the moments (often the variance only) are known, and since the density of probability of the ... to the same result Moreover, this technique can also be used to accelerate the convergence of the iterative scheme The smaller the spectral radius of |[G]|, the faster the convergence of the ... algorithm and the smaller the overestimation of the solution 4.2 TEST OF THE NEW ALGORITHM ON A SIMPLE CASE A new version of the algorithm of Rump has been developed to handle the case in which the interval...
- 21
- 424
- 0
Tài liệu ANALYSIS OF FOOD PRODUCTS doc
Ngày tải lên :
20/01/2014, 13:20
... fraction of the light incident upon the surface of full fat milk is scattered due to the presence of the fat droplets • The rheological properties of foods are determined by the way that the shape of ... provide the appropriate information about food properties The most important criteria for this type of test are often the accuracy of the measurements and the use of an official method The government ... beneficial to health Authenticity The price of certain foods is dictated by the quality of the ingredients that they contain For example, a packet of premium coffee may claim that the coffee beans are...
- 117
- 341
- 0
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
Ngày tải lên :
14/02/2014, 22:20
... photosynthesis, gas exchange of plants was measured by infrared gas analysis Measurements were performed during the first h 508 of the light phase, representing the time period of photosynthetic ... interconversion rates as a function of time of cold exposure, (b) comparison of the magnitudes of the various interconversion rates, and (c) lineup of the accessions with respect to their metabolic acclimation ... terms of the absolute values but also in the progression of the acclimation process This is an important outcome, as it allows estimation of the impact of different metabolic responses on the improvement...
- 13
- 707
- 0
