Optimization of microwave-assisted extraction of active components from Yuanhu Zhitong prescription

Process optimization and evaluation of novel baicalin solid nanocrystals

“…Blood samples of approximately 0.25 mL were collected by retroorbital puncture at predetermined intervals 0. 25…”

Grape marc phenolics: Extraction kinetics, quality and stability of extracts

“…One of the higher-value options is the recovery of bioactive plant food constituents such as polyphenols, which have antioxidant properties and could be used in the pharmaceutical, cosmetics and food industries. In spite of the numerous studies found in the literature on solid-liquid extraction (the most commonly used technology) of natural antioxidants from plant materials, data on the optimisation, modelling and simulation of this process are scarce, and often optimisation has been carried out by statistical approaches (Bucić -Kojić et al, 2007;Cacace and Mazza, 2003;Herodež et al, 2003;Ku and Mun, 2008;Liao et al, 2008;Pinelo et al, 2005;Simeonov et al, 1999;Spigno and De Faveri, 2009). However, there is a need for mathematical modelling, which, as a useful engineering tool, considerably facilitates the optimisation, simulation, design and control of processes and contributes to better utilisations of energy, time and solvent.…”

Microwave-assisted extraction of tea phenols: A phenomenological study

“…The highly localized temperature and pressure can cause selective migration of target compounds from the material to the surroundings at more rapid rate and with similar or better recoveries compared with conventional extraction, with the main advantages of reducing both extraction time and solvent consumption. Many reports have been published on the application of MAE of secondary metabolites from plants Hao et al, 2002;Hemwimon et al, 2007;Liao et al, 2008;Pan et al, 2002;Rostagno et al, 2007;Wang et al, 2007;Xiao et al, 2008;Zhang et al, 2008;). Only the above cited paper by Pan et al (2003) was found to have investigated on MAE of tea polyphenols.…”

“…Some authors have carried out optimisation by statistical approaches (Liao et al, 2008;Wang et al, 2007), but a mathematical analysis of the experimental results based on a phenomenological approach, which mathematically models all the occurring phenomena, is lacking. Modelling on a theoretical basis was done to reduce the dependence on empirical data, although some empiricism is still required, mainly for the validation of the developed model.…”