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

... www.sciencedirect.com Journal of Pharmaceutical and Biomedical Analysis 46 (2008) 322–327 Microwave assisted extraction of curcumin by sample–solvent dual heating mechanism using Taguchi L 9 orthogonal design Vivekananda ... novel extraction method using microwaves based on solvent–sample duo -heating synergism, for the extraction of curcumin from Curc...

Ngày tải lên: 01/07/2014, 13:23

... ratios of the MPA stabilizer to Figure 2 Optical performance of CdTe cores and corresponding CdTe/CdSe type II QDs by means of microwave- assisted synthesis. The optical performance of a series of ... corresponding CdTe/CdSe type II QDs by means of microwave- assisted synthesis. The QD samples are excited at their first excitation absorption peak, and The PL intensities...

Ngày tải lên: 21/06/2014, 03:20

... attributed to the ion assisted growth of the crystallites which may be different for OH - assisted growth in the case of S1 and Cl - assisted growth in S2 and Cl - and NH 4 ? assisted growth in ... deg- radation of the dye was monitored by measuring the absorption maximum of methylene blue at 661 nm at 30 min intervals of reaction. Nanoscale Res Lett (2009) 4:144–152 145 1...

Ngày tải lên: 22/06/2014, 01:20

... confirm whether peak 1 represents an impurity of curcumin with a different structure or another form of curcumin, after fractionation of peak 2, a portion of the fraction was subjected to analysis ... W.L. Alworth, NMR study of the solution structure of curcumin, J. Nat. Prod. 70 (2007) 143–146. [(Fig._4)TD$FIG] Fig. 4. Fragmentation of curcumin in keto form and enol form...

Ngày tải lên: 01/07/2014, 13:22

... Y., & Hemalatha, S. (2008). Microwave assisted extraction of curcumin by sample-solvent dual heating mechanism using Taguchi L9 orthogonal design. Journal of pharmaceutical and biomedical ... volume of solvent as minimum volume for extraction of curcumin from turmeric. Fig. 1D shows the effect of pre-macerating time on the dissolv- ing of curcumin...

Ngày tải lên: 01/07/2014, 13:23

... Demonstration of the disassembly of a defunct LCD Carbon dioxide extraction was carried out using a Thar Technologies SFE-500F-2-FMC System and liquid withdrawal carbon dioxide (99.9 %). The extraction ... calculation of the percentage recovery. RESULTS Initial extractions where conducted on small LCDs designed to control thermostats (figure 3A). Using supercritical con...

Ngày tải lên: 28/04/2014, 10:50

... Chromatographic profiles of curcumin: curcumin standard (A) and curcumin obtained after Soxhlet assisted extraction (B), microwave assisted extraction (C), ultra- sonic assisted extraction (D) and ... 2011 Keywords: Curcumin Microwave assisted extraction Soxhlet assisted extraction Supercritical carbon dioxide assisted extraction Ultra-sonic assisted ext...

Ngày tải lên: 01/07/2014, 13:23

Ngày tải lên: 16/03/2014, 00:07

... 24 (2004) 278–281 Sulfide -assisted growth of silicon nano-wires by thermal evaporation of sulfur powders Junjie Niu a , Jian Sha a,b , Deren Yang a, * a State Key Lab of Silicon Materials, Zhejiang ... (1 1 1) silicon wafers with a resistivity of about 0.001 O cm by means of a low-vacuum CVD system. First, several pieces of silicon wafers and plenty of sulfur powders were p...

Ngày tải lên: 16/03/2014, 15:21

... scheme of the possible synthesis mechanism of the composite particles is shown in Fig. 1. By taking advantage of the micelle reaction system, we firstly obtained colloidal PANI doped with DBSA by ... Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China b Department of Chemistry, Coll...

Ngày tải lên: 20/03/2014, 13:04