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Different extraction methods of biologically active components from Propolis: a preliminary study
Preliminary communication 
Different extraction methods of biologically active components from Propolis: a preliminary study
Boryana Trusheva, Dorina Trunkova, Vassya Bankova
Chemistry Central Journal 2007, 1:13 (7 June 2007)
[Abstract] [Provisional PDF]
This short communication compares three techniques (traditional maceration, ultrasound, and microwave assisted extraction) used to extract the biologically active constituents of propolis, a natural product for which there is a high scientific and commercial interest. The authors conclude that, compared to maceration extraction, the other two methods provide higher extraction yield, and require shorter timeframes and less labour, with UE shown to be the overall most efficient method.
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