Various novel techniques including ultrasound-assisted extraction, microwave-assisted extraction and supercritical fluid extraction have been developed for the extraction of medicinal plants in order to shorten the extraction time, decrease the solvent consumption, increase the extraction yield, and enhance the quality of extracts. This review was conducted to introduce and compare the conventi...

The kinetics solid-liquid extraction of phenolics from wild olive leaves was elaborated using different mathematical models (Peleg, second order, Elovich, and power law model). As solvents, methanol, ethanol, ethanol:water 1:1, n-propanol, isopropanol and ethyl acetate were used. The second order model best described the solvent extraction process, followed by the Elovich model. The most effect...

Ciênc. Tecnol. Aliment., Campinas, 21(1): 10-13, jan.-abr. 2001 1 Recebido para publicação em 11/09/98. Aceito para publicação em 30/06/00. 2 Jahan Vegetable Oil Co., Research Department. 16 Daman Afshar st., wali-Assr Ave., Above wanak sq. Tehran 19697, Iran. SUMMARY Spent nickel catalyst (SNC) has the potential of insulting the quality of the environment in a number of ways. Its disposal has ...