extraction of vanillin from store bought vanilla extract

... analytical data of the polymer components shown in Table Conclusions Four different microbial polymer extraction methods (steaming extraction, NaOH extraction, SDS extraction, and washing extraction) ... effective extraction method for activated sludge However, cell disruption is not effective for the isolation of bioflocculants Thus, NaOH extraction was the most effective method for the extraction of ... chemical components of polymers obtained from activated sludge by the four extraction methods are summarized in Table Yield varied significantly with extraction method, with NaOH extraction having...

Ngày tải lên: 05/09/2013, 09:08

... after extraction as well as sugar production and change in starch content after hydrolysis of residual extraction solids In a secondary experiment, fermentability of sugars produced from extraction ... conversion and ethanol production from ISP extraction residues Since the majority of sugars produced from residual solids that underwent anthocyanin extraction were in the form of the simple sugar glucose, ... effect of initial extraction conditions on the production of fermentable sugars from purple-fleshed ISP starch during a subsequent hydrolysis process was examined Materials and methods 2.1 Extraction...

Ngày tải lên: 05/05/2014, 08:39

... B: Extraction of curcumin from turmeric with different concentrations of ethanol C: Absorbance of the solvent by turmeric powder D: Effect of macerating hours on the extraction of curcumin from ... different columns from low to high contents of curcumin The cyclic chromatographic extraction reduced extensively the volumes of the solvent and the final extraction solution with high extraction efficiency ... higher extraction rates than the ultrasonic-assisted macerating extraction (Table 1) The CCE procedure, which used 8-fold solvent for complete extraction of curcumin, is good for non-continuous extraction...

Ngày tải lên: 01/07/2014, 13:23

... yield of MAE method 3.1.5 Comparison of the results of extraction with MAE and other methods Other extraction procedures (conventional heating reflux extraction method, ultrasoundassisted extraction ... (humility usually from to %) 3.1.3.Effect of radiation time on the extraction of polyphenols Polyphenols concentration in the extracts was rapidly increased in the first minutes of extraction (Figure ... extraction of polyphenols It was found that material/solvent ratio did not have much effect to yield of the extraction Figure showed that the extraction was increased with the increase of material/...

Ngày tải lên: 22/07/2014, 10:21

... structure of each compound In this work FTIR was employed with the aim of verifying if lignin and hemicelluloses were removed from the extracted cellulose In this work FTIR spectra of RH, RH free of extractives, ... the absence of these bands indicates that most of the lignin was removed So in RH cellulose the extraction procedures removed most of lignin polymers because of the disappearance of the lignin-associated ... step of mass loss Journal of Analytical and Applied Pyrolysis, 88, 151–165 Morán, J I., Alvarez, V A., Cyras, V P., & Vazquez, A (2008) Extraction of cellulose and preparation of nanocellulose from...

Ngày tải lên: 08/10/2014, 06:05

... amount of extracted bixin at the beginning of extraction process, compared to that of the extraction by Soxhlet extractor This method achieved a yield of 63% at 20 of extraction while that value of ... extracts…………………… 36 Effects of extraction method, volume of acetone and light on the extraction yield of bixin and content of volatile compounds in extracts………………… 42 Extraction of bixin from annatto seed ... that of sodium hydroxide extraction (p

Ngày tải lên: 29/11/2014, 08:21

... classical liquid liquid extraction (LLE) Microextraction techniques are characterized by the extraction of analytes from a given donor phase, into a minuscule volume of a selected acceptor phase ... Liquid-liquid extraction LOD Limit of detection LOQ Limit of quantification muSPE Micro solid phase extraction using mixed matrix membrane μ-SPE Membrane bag micro solid phase extraction MPME ... Chapter 1: Introduction Direct extraction of PAI, most of which are polar or hydrophilic from their aqueous solutions can be highly challenging due to the lack of suitable extractants that is complicated...

Ngày tải lên: 10/09/2015, 09:12

... provides a brief overview of the challenges of the different types of texts considered in this thesis We also review existing text extraction methods and identify some of the research gaps that ... feature extraction scheme Image or video Localization Enhancement Binarization Recognition Text strings Tracking Figure 2.4 The typical steps of a text extraction system (Figure adapted from (Jung ... (right) Figure 2.4 The typical steps of a text extraction system (Figure adapted from (Jung et al 2004).) 10 Figure 2.5 The (white) bounding boxes of the localized text lines 11 Figure...

Ngày tải lên: 12/09/2015, 11:24

... dividing lines of the domains of attraction of rain falling over the region The height of each point represents its intensity value The input of the watershed transform is the gradient of the original ... comprises of two stages: a model training stage and a boundary extraction stage In the model training stage, the shape and appearance of the optic disc or cup are modeled In the boundary extraction ... Flowchart of the proposed PPA detection method 70 4.2 Examples of (a) square structuring element with width of pixels (b) disk structuring element with radius of pixels 71 4.3 Output of...

Ngày tải lên: 05/10/2015, 22:32

... extraction of the samples The effects of the extraction parameters such as temperature, weight and extraction time were investigated on the yield values The P- values show the significance of coefficients ... study proved that statistical experimental designs offer an efficient extraction yield optimization of mulberry fruits A maximum extraction yield of 1.15% was achieved with the following optimized ... in Table Total of 20 experiments were set up using the CCD matrix The yield extraction of mulberry values (Y) was taken as the response of the design experiment Design Expert software version...

Ngày tải lên: 02/08/2016, 13:37

... where Extraction and characterization Fig 2(a) Fig 2(b) of chitin 149 50 Fig 2(c) Fig 2(d) Extraction and characterization of chitin Fig 2(e) Fig Scanning electron micrographs of dry surfaces of ... Reaction of chitosan: Preparation and reactivity of N-acyl derivatives of chitosan Inr J Biol Macromol 2, 292 (1981) 18 G K Moore and G A F Roberts, Determination of degree of N-acetvlation of chitosan ... for 2h 15% NaOH Deproteinization Extraction at 65°C for 3h with acetone Dilute NaOCL for 15min at room temperature Washing Scheme and drying Isolation of chitin Extraction and characterization...

Ngày tải lên: 24/08/2016, 16:11

... contexts of questions and dependency between answer sentences We also note the existing work on extracting knowledge from discussion threads Huang et al.(2007) used SVM to extract input-reply pairs from ... for entity extraction and meeting summarization (Sutton and McCallum, 2006; Galley, 2006) The graphical representation of a Skip-chain CRF given in Figure2(b) consists of two types of edges: linear-chain ... context of a question in this paper A summary of forum threads in the form of question-context-answer can not only highlight the main content, but also provide a user-friendly organization of threads,...

Ngày tải lên: 23/03/2014, 17:20

... to improve extraction efficiency and reduce extraction time [35] The proposed benefits of UAE include: (a) overall, enhancement of extraction yield or rate, (b) enhancement of aqueous extraction ... technique showed higher extraction efficiency of curcumin in RSC Advances Page 12 of 25 View Article Online DOI: 10.1039/C5RA06002H Mechanism of sonication based extraction of curcumin from turmeric The ... successful extraction of curcumin in water The extraction efficiency observed at h using the WBS method was obtained as early as (PUS 2) using 100% SF It was observed that the extraction of RSC Advances...

Ngày tải lên: 25/08/2016, 22:45

... similar case of surgical removal of lipoma from an area with tattooed skin using this aesthetic procedure was found in literature The intent of the case study is to highlight the use of pre-existing ... to meet the need of our patient of removing the lipomatous formation while keeping the tattoo intact, during the surgical treatment of the lipoma, we followed the exact lines of the tattoo itself ... consent was obtained from the patient for publication of this case report and accompanying images A copy of the written consent is available for review by the Editor-in-Chief of this journal AUTHORS'...

Ngày tải lên: 25/10/2012, 11:35

... Color profile: Disabled Composite Default screen Feng and Lee point from the U–T1/2 plot in Fig of the discussed paper is not as difficult as that implied ... paper is not as difficult as that implied by the discussers 1003 Taylor, D.W 1948 Fundamentals of soil mechanics John Wiley & Sons, New York 700 pp Feng and Lee References Casagrande, A., and...

Ngày tải lên: 22/03/2013, 14:48

Ngày tải lên: 18/08/2013, 04:10

... 70.19m²/g, pore volume of 0.00062cm3/g and pore size of 126Å Preparation of AC-Fe AC from coconut shell was taken from MAPECOH, Inc (Philippines) with a particle size of 0.45-0.71mm after sieving ... stock solutions of As(III) were prepared from As(III) standard solution of 1003mg/L (Wako Pure Chemicals Ltd, Japan) The stock solutions of As(V) were prepared by dissolving 4.1646mg of Na2HAsO4.7H2O ... the process kinetics of adsorption From equation (1), the use of n=1 from calculation and the assumption in section 3.1 (adsorption equilibrium), gives the overall rate of adsorption/de-sorption...

Ngày tải lên: 05/09/2013, 09:38

... The observation of storm-runoff events is not so easy to carry out sufficient times of the observation Then, the samples of storm-runoff loads were supplemented with the storm-runoff loads calculated ... calculated from monthly data of Ci of the water sample reserved in the deposit sampler and Qi of the volume by ILM The annual net-load (unit load) of TN was 35.8±4.05 kg ha-1 y-1 on the average of three ... and 34% of TN Event was one of storm-runoffs after the second plowing in late-March, and showed the typical pattern distinguished clearly from those before the plowings The concentration of TN...

Ngày tải lên: 05/09/2013, 09:38

... investigate the effects of pH values within the range of 5-9, of initial arsenic concentrations within the range of 1.42 - 7.39 mg/L and of adsorbent doses within the range of 0.5 - 5.0g/L, as well ... RH-Fe5%, particle size of 0.1-0.35 mm, with Co of 1.42-7.38 mg/L, adsorbent dose of 2.5 g/L, pH of simulated groundwater (pH 8.18) Comparison of adsorption isotherms The values of the linear and nonlinear ... the significance of adsorption capacity and intensity of adsorption, respectively KF and n are calculated from the intercept and slope of the plot logqe and logCe The values of Freundlich isotherm...

Ngày tải lên: 05/09/2013, 09:38