extraction of safrole from sassafras oil

Comparison of Methods for the Extraction of Bioflocculants from Activated Sludge

Ngày tải lên : 05/09/2013, 09:08

... 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 ... ratio of the UV-absorbing peak indicated it was composed mainly of nucleic acid In the profile of the NaOH-extracted polymer (B), the elution volume (80 ml) of saccharide corresponded to that of ... 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) ...

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Extraction of anthocyanins from industrial purple ﬂeshed sweetpotatoes and

Ngày tải lên : 05/05/2014, 08:39

... 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, ... combinations (sterile water instead of solvent) Residual solids from the described extraction treatment combinations were carried forward to examine the effects of the extraction conditions on sugar...

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High efficient column chromatographic extraction of curcumin from curcuma longa

Ngày tải lên : 01/07/2014, 13:23

... 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 ... Programs of Guangzhou City (2009-T-17-1) and Guangdong Natural Science Fund (10151063101000002) References Fig Column-chromatographic extraction of curcumin from turmeric A: Extraction of curcumin from ... macerating method, the extraction efﬁciencies of different concentrations of ethanol was tested As shown in Fig 1B, the extraction rates of curcumin increased with ethanol concentrations from 40% to 80%,...

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Báo cáo nghiên cứu khoa học: "MICROWAVE-ASSISTED EXTRACTION OF POLYPHENOLS FROM FRESH TEA SHOOT" pps

Ngày tải lên : 22/07/2014, 10:21

... 3.1.5 Comparison of the results of extraction with MAE and other methods Other extraction procedures (conventional heating reflux extraction method, ultrasoundassisted extraction and extraction at ... (82.46 %) of MAE for minutes radiation (18 total time of extraction) higher than that of ultrasound-assisted extraction in 60 minutes, conventional heating reflex extraction in 60 minutes and extraction ... material/ solvent ratio from 1:4 to 1:6, afterward, yield of extraction was slightly decreased, from 19.36 to 18.10 with ratio increased from 1:6 to 1:8, then increased, from 18.10 to 21.06 with...

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Chlorine free extraction of cellulose from rice husk and whisker isolation

Ngày tải lên : 08/10/2014, 06:05

... 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 ... to determine the ash content of rice husk TGA scans were carried out from 35 to 700 ◦ C at a heating rate of 10 ◦ C min−1 and under inert atmosphere of N2 in a ﬂux of 50 mL min−1 (TA Instruments...

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Membrane protected micro solid phase extraction of pharmaceuticals from environmental water samples

Ngày tải lên : 10/09/2015, 09:12

... 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 ... 46 3.3.2 Preparation of surface modified sorbents 3.3 44 47 3.3.2.1 Preparation of APS 47 3.3.2.2 Preparation of UPS 47 3.3.2.3 Preparation of ZIPS 47 3.3.3 Characterization of sorbents and sorbent-containing ... Determination of EWC 48 References 49 RESULTS AND DISCUSSION 50 Preparation of sorbents 51 4.1.1 Preparation of APS and UPS 51 4.1.2 Preparation of ZIPS 53 4.2 EWC 54 4.3 Comparison of sorbents...

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Extraction of text from images and videos

Ngày tải lên : 12/09/2015, 11:24

... List of Tables x List of Figures xi List of Abbreviations xvii Introduction 1.1 1.2 Problem Description and Scope of Study Contributions Background & Related Work 2.1 Challenges of ... adapted from (Chen & Odobez 2005).) 51 Figure 2.26 The four main steps of text recognition (Figure adapted from (Casey & Lecolinet 1996).) 53 Figure 2.27 The results of projection profile ... 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...

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Extraction of features from fundus images for glaucoma assessment

Ngày tải lên : 05/10/2015, 22:32

... 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 ... 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 ... 66 vii List of Figures LIST OF FIGURES 1.1 An example of color fundus image 2.1 Histogram of a bimodal image 2.2 Gradient vector flow [22] Left: deformation of snake with...

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EXTRACTION OF ANTHOCYANNIN FROM MUMBERY FRUITS: PROCESS OPTIMIZATION USING RESPONSE SURFACE METHODOLOGY (RSM)

Ngày tải lên : 02/08/2016, 13:37

... 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 ... 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...

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extraction of essential oil from lemongrass using supercritical carbon dioxide

Ngày tải lên : 13/11/2014, 06:25

... Physicochemical Properties of Lemongrass Oil 32 Table 5: Physicochemical Properties of main components of essential oil 34 Table 6: Investigation of SC CO2 extraction of essential oil from lemongrass ... conditions on extraction yield of essential oil from Lemongrass, Leaves (RSM) 177 Appendix K: Effects of extraction conditions on extraction yield of essential oil from Lemongrass, Stems (RSM) ... results of essential oil from Lemongrass, Leaves (RSM) 169 Appendix I: Analyses results of essential oil from Lemongrass, stems (RSM) 174 x Appendix J: Effects of extraction conditions on extraction...

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Preparative isolation and purification of six volatile compounds from essential oil of Curcuma wenyujin using high-performance centrifugal partition chromatography doc

Ngày tải lên : 07/03/2014, 21:20

... total of mg of curdione (1), mg of curcumol (2), 10 mg of germacrone (3), 18 mg of curzerene (4), mg of 1,8-cineole (5) and 17 mg of b-elemene (6) from the essential oil (300 mg) in 2.4 mL of the ... temperature Both of the upper and the lower phases were degassed for 30 by ultrasonication before use Aliquots of 300 mg of the essential oil were diluted by 2.4 mL of the mixed solution of lower phase ... grade were purchased from Merck (Darmstadt, Germany) The essential oil of Curcuma wenyujin was purchased from Zhejiang Ruian Pharmaceutical (Ruian, China) The reference compounds of curdione (1),...

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Báo cáo khoa học: "Extraction of Tree Adjoining Grammars from a Treebank for Korean" pdf

Ngày tải lên : 23/03/2014, 18:20

... extracting grammars from a Treebank A feature structure is a way of representing grammatical information Formally feature structure consists of a specification of a set of features, each of which is ... feature structure of a new node created by substitution inherits the union of the features of the original nodes The top feature of new node is the union of the top features (f1 ∪ f) of the two original ... Insertion Grammars, one variation of TAG formalism for his extraction system from English Penn Treebank Xia et al (2000) developed the uniform method of a grammar extraction for English, Chinese...

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Báo cáo khoa học: "A concurrent approach to the automatic extraction of subsegmental primes and phonological constituents from speech" docx

Ngày tải lên : 31/03/2014, 04:20

... automatically The objects concerned wilh the extraction of cues from spectra, segmentation, manner-class sequencing and display of constituent structure, repairing effects of lenition and assimilation are ... cues are calculated from fast Fourier transforms (FFTs) of speech signals in terms of total amplitude or energy distribution ED across low, middle and high frequency parts of the vocal range and ... computable only after segmentation from the length in slices from boundary to boundary, 579 normalising this length using the JSRU database of the relative durations of segments in different manner...

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Báo cáo Y học: Thermal stability of peroxidase from the african oil palm tree Elaeis guineensis pdf

Ngày tải lên : 31/03/2014, 15:20

... spectropolarimeter, using a spectral band-pass of nm and a cell path length of mm with a protein concentration of 0.2 mgặmL)1 Spectra are averages of four scans at a scan rate of 50 nmặmin)1 All spectra were ... signicantly different from other haem peroxidases from plants for which, despite the low level of sequence homology (often less than 20%), the overall folding and the organization of the secondary ... the thermal stability of AOPTP with that of other peroxidases In our previous publication [8] we reported the results of a detailed investigation of the thermal denaturation of horseradish peroxidase...

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Báo cáo khoa học: "Effect of Utilizing Terminology on Extraction of Protein-Protein Interaction Information from Biomedical Literature" ppt

Ngày tải lên : 31/03/2014, 20:20

... may often be used with determiners in the general domain Hosaka, Junko and Umetsu, Ryo 2002 Toward the extraction of protein-protein interaction information from immunology literature Proc of ... network of human genes for high-throughput analysis of gene expression Nature Genetics, 28: 21-28 Yakushiji, Akane, et al 2001 Event extraction from biomedical papers using a full parser Proc of PSB, ... NP/NPL to the left of the "activat*" phrase • Extract the highest NP/NPL "ACK-2" Preliminary Evaluation We applied our extraction rules to two sets consisting of the parsing outputs from 100 sentences:...

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extraction of liquid crystals from flat panel display devices using both liquid and supercritical carbon dioxide

Ngày tải lên : 28/04/2014, 10:50

... through use of fractional separators or at the point of extraction by stepwise alterations of pressure and temperature Figure 6: A) Structure of isolated component, B) 1H NMR spectrum of isolated ... was charged with 300 g of glass from a LCD panel (Figure 2D) cut into 10 cm x cm segments Typical extraction took place at a pressure of 250 bar and 40°C with a flow rate of 40 g/min, the collector ... bar and 40ºC the extraction recovery from complete screens was poor, 0.1% of the total liquid crystal present The removal of a resin seal from the outer edge of the LCD did not significantly increase...

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Preparation, characterization and application of heterogeneous solid base catalyst for biodiesel production from soybean oil

Ngày tải lên : 05/05/2014, 08:42

... transesterification of soybean oil with methanol A screening of the reaction conditions has been carried out by examining the effect of the concentration of catalyst, the initial methanol/ oil, catalyst /oil ... this kind of problem, an optimum amount of catalyst loading had to be investigated The influence of the catalyst amounts was studied at a 14:1 M ratio of methanol to soybean oil at reflux of methanol ... good dispersion of K2O on Nd2O3 in the form of a monolayer due to the interaction between K2O and the surface of the support at a low loading of KOH And when the loading amount of KOH was further...

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Báo cáo hóa học: " Research Article Extraction of 3D Information from Circular Array Measurements for Auralization with Wave Field Synthesis" ppt

Ngày tải lên : 22/06/2014, 19:20

... Detail of the measured data set of Figure 4, (b) reconstruction of the response of the first-order ceiling reflection using the Radon transform method, (c) the result of subtracting (b) from (a) ... Conservatory of Music in The Hague, at the Department of “Art of Sound.” During the summer semester of 2001, he fulfilled the “Edgard Varese” guest professorship at TU Berlin In 2004, he held a Guest Professor ... data set of Figure 4, (b) reconstruction of the response of the first-order ceiling reflection using the cylindrical harmonics decomposition method, (c) the result of subtracting (b) from (a) 10...

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Extraction of î± tocopherol and î³ oryzanol from rice bran

Ngày tải lên : 17/08/2014, 21:37

... flow rate of 1.5 mL/min and UV detector of 295 nm 2.4 Extraction of a-tocopherol and g-oryzanol from rice bran using solvent extraction A g sample of rice bran was extracted using 100 mL of hexane ... of temperature The effect of temperature on the extraction was studied at a constant pressure of 48 MPa, using a CO2 flow rate of 0.45 mL/min and at temperatures from 45 to 65 1C The results of ... 12 show that extraction rate is increasing in the beginning of extraction, since there is a lot of concentration gradient of substances in bulk fluid and interior of rice bran The extraction rate...

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