Optimized microwave-assisted extraction of phenolic compounds from
Scirpus holoschoenus and its antipseudomonal efficacy, alone or in
combination with Thymus fontanesii …
Authors
Saliha Oussaid, Khodir Madani, Karim Houali, Manuel Rendueles, Mario Diaz
Publication date
2018/7/1
Journal
Food and bioproducts processing
Volume 110 Pages 85-95 Publisher Elsevier Description
Phenols extracted from Scirpus holoschoenus rhizomes, alone or in combination with other substances, have interesting antipseudomonal properties. Maximum extraction efficiency was achieved by using parametric optimization methods. In this study, the microwave-assisted extraction of phenolic compounds from S. holoschoenus L. rhizome was performed with the help of Response Surface Methodology, and the optimal parameters were found to be 56% acetone, 69 s time and 600 W for power, with a TPC value of 30.70 ± 1.22 mg GAE/g dry weight (dw). The ethyl acetate fraction (EA) of the optimized extract was tested in combination with diluted essential oil of T. fontanesii (EOd) and lactic acid (LA) on Pseudomonas aeruginosa. Mixture
design indicated that at 7 °C, the 75% EOd, 25% EA and 0% LA mixture gave the
largest diameter inhibition zone (63 ± 2 mm). A mixture of 83.7% EOd and 16.28%
EA was the …
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