High efficient column chromatographic extraction of curcumin from curcuma longa

... rhizome of Curcuma longa L. High- efficient column chromatographic extraction (CCE) proce-dures were developed for the extraction of curcumin from turmeric. Turmeric powder was loaded intoa column ... communication High- efficient column chromatographic extraction of curcumin from Curcuma longa Pei-Yin Zhana, Xue-Hua Zenga, He-Ming Zhangb,⇑, Hai-Hang Lia,⇑aGuangdong Provincial Key Laboratory of ... different columns from low to high contents of curcu-min. The cyclic chromatographic extraction reduced extensivelythe volumes of the solvent and the final extraction solution with high extraction...

Optimization of microwave, ultra sonic and supercritical carbon dioxide assisted extraction techniques for curcumin from curcuma longa

... Effect of microwave irradiation on pre-soaked rhizomes. () % Extraction of curcumin using ethanol from ethanol soaked curcuma powder, () % extraction of curcumin using ethanol from water soaked curcuma ... characteristic of the turmeric rhizome,is due to presence of 3–5% of curcuminoids. The curcuminoidsincludes curcumin, demethoxycurcumin, bisdemethoxycurcumin[1] and cyclocurcumin [2] of which curcumin ... 50–55Fig. 2. Chromatographic proﬁles of curcumin: curcumin standard (A) and curcumin obtained after Soxhlet assisted extraction (B), microwave assisted extraction (C), ultra-sonic assisted extraction...

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High performance liquid chromatographic analysis of urinary catecholamines employing amperometric detection.pdf

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Comparison of Methods for the Extraction of Bioflocculants from Activated Sludge

... polymer extraction methods (steaming extraction, NaOH extraction, SDS extraction, and washing extraction) were compared to develop an effective extraction method for bioflocculants from activated ... effective extraction method for bioflocculants from activated sludge. Microbial polymers obtained from activated sludge by four different extraction methods (steaming, NaOH, SDS and washing extractions) ... results indicate that NaOH extraction was the most effective method for the extraction of bioflocculants from activated sludge. Key words: activated sludge, bioflocculants, flocculating activity...

Extraction of anthocyanins from industrial purple ﬂeshed sweetpotatoes and

... average, each solvent extracted higher TMA concen-trations at the higher extraction temperature of 80◦C within eachsolid loading than at the lower extraction temperatures of 25 or50◦C. Solid loading ... average89.7% of the dry matter. Change in starch content ranged from 67to 78.3% of the dry matter, leaving a residual starch content of atleast 11.4% of the dry matter. The highest change ... (no extraction) produced statistically higher amounts of glucose onaverage (488.7 mg/g dry ISP) than any of the treatments that wentthrough extraction and hydrolysis (P < 0.05). The highest...

Microwave assisted extraction of curcumin by sample–solvent dual heating mechanism using taguchi l9 orthogonal design

... work, extraction efficiency (%) for MAEis defined as follows.Relative extraction efficiency (%) =Percentage extraction of curcumin (w/w) obtained from MAE × 100Percentage extraction of curcumin ... The effect of the interaction of modifier volume with microwave power on extraction efficiency of curcumin. (c) The effect of the interaction of modifier volume with grinding degree on extraction ... in per-centage extraction of curcumin (w/w) obtained under orthogonaldesign conditions, both in presence and absence of modifier.The difference in percentage extraction of curcumin (w/w) wasFig....

Báo cáo khoa học: High resolution structure and catalysis of O-acetylserine sulfhydrylase isozyme B from Escherichia coli pot

... kinetic parameters of wild-type CysM from E. coli are in general agreement with those of thehomolog CysM(salmo) [18,19]. Of the active centermutants produced, the deletion of a methyl group ... nearFig. 1. Stereo ribbon plot of the high resolu-tion structure of the CysM dimer, includingthe molecular twofold axis (black), which iscrystallographic. The position of the surfacemutation K268A ... distribution of CysM(salmo) is from sub-unit A, which is virtually the same as those of the other seven sub-units [18]. The two distributions at the bottom are from dimersA–B and C–D of CysM(RKE)...

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

... its coverage. The size of grammars means tree schemata according to the number of sentences as shown in Figure 9. The coverage of grammar is the number of occurrences of unknown tree schemata ... ex-tracted grammar has the advantage of the coher-ence of extracted grammars and the rapidity of its development. However, as it always depends on the Treebank which the extraction system uses, its ... 0.9638Table 3. Coverage of grammars: 90% of training set (2,273 sentences) and 10% of test set (253 sen-tences) We manually overlap our 163 tree schemata for predicates from T3, which contain...

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

... 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 ... 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 ... define the acoustic signatures of individual elements, so that the presence of an element can be detected by analysis of the speech signal. Picking out elements from the signal is much more...

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

... simplic-ity, we suppress them in the example below.108Effect of Utilizing Terminology on Extraction of Protein-ProteinInteraction Information from Biomedical LiteratureJunko HosakaJudice L.Y. KohAkihiko ... to the left of the"activat*" phrase.•Extract the highest NP/NPL. 4 "ACK-2"4 Preliminary EvaluationWe applied our extraction rules to two sets con-sisting of the parsing ... ran-domly from the sentences to which both annota-tors gave the same marking and same evaluation.To determine the reliability of the annotators'judgment and the difficulty of the task,...

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