The effects of microwave power, time, solvent, monomer and catalyst's concentration on the polymerization have been systematically investigated.
Several operating parameters, namely microwave power, time, temperature and ethanol concentration, were optimized using response surface methodology (RS M with a central composite rotatable design (CCRD).
A 26−2 fractional factorial design was initially employed and it was found that microwave power, extraction time, ethanol level and extraction times were the most important variables that affected the yield of tetrahydropalmatine, imperatorin and isoimperatorin, which are active components in YZ prescription.
Several different influential extraction parameters such as microwave power, extraction time, solvent type, solvent composition, preleaching time, loading ratio and extraction cycle were studied in a systematic fashion for the determination of optimum extraction conditions.
The effect of microwave power, reaction time, methanol-to-oil ratio, and catalyst loading was investigated.
Pectin extraction was optimized by a central composite rotational design varying microwave power, extraction time and temperature.
The main factors contributing to the extraction efficiency namely microwave power, irradiation time and number of cycles were optimized by means of a two-level full factorial design.
The main factors affecting the extraction efficiency namely microwave power, irradiation time, volume of extractant and number of cycles were optimized by a two-level factorial fractional design.
From response surface plots, microwave power, extraction time and ethanol proportion exhibited independent and interactive effects on the extraction of TPSL.
A face-centered cubic design (FCD) was applied to evaluate the effects of three independent variables (microwave power, extraction time and ethanol proportion) on the recovery of TPSL.
Extraction conditions, namely microwave power, irradiation time, particle size and modifier volume were optimized using Taguchi design approach and curcumin was quantified using high performance thin layer chromatography.
