Study on the Extracting Conditions of Flavonoid from Tea by Response Surface Methodology
This paper deals with the study on the extracting conditions of flavonoid from tea.Response surface methodology was used to obtain the optimum extracting conditions by Design-Expert 6.0.The research findings show that the optimum extracting conditions were as follows:extracting 60 min,water temperature 80℃,60%alcohol,10 times volumes.
Abstract A new approaoh to dispersion identification of nonlinear plants is introduoed. Conditional and unoonditional moment first and seoond order oharaoteristics of stoohastio prooesses are obtained from subjective'probability. This signifioantly expands the use of oorrelational and dispersion identifioation methods. Soundness of the subjeotive-probabilistic approach is proved,subjective dispersion functions are determined from a priori and a posteriori information as are recurrence forms of the characteristics introduced. For identifioation of nonliniar plants new results are introduced,dispersion identification equations and quantitative estimates of the nonlinearity degree.