Optimization of microwave-assisted extraction of flavonoids from young barley leaves.


No.	Divisions/Titles for Abstract	Details
1	Abstract Title	Optimization of microwave-assisted extraction of flavonoids from young barley leaves.
2	Abstract Source	International Agrophysics, 31, 45-52.
3	Abstract Author(s)	Gao, T., Zhang, M., Fang, Z. & Zhong, Q.
4	Article Affiliation	State Key Laboratory of Food Science and Technology, Jiangnan University, 214122 Wuxi, Jiangsu, China.
5	Abstract	A central composite design combined with response surface methodology was utilized to optimise microwave-assisted extraction of flavonoids(Flavonoids are a group of plant metabolites thought to provide health benefits through cell signalling pathways and antioxidant effects) from young barley leaves. The results showed that using water as solvent(a substance capable of or used in dissolving or dispersing one or more other substances), the optimum conditions of microwave-assisted extraction were extracted twice at 1.27 W g−1 microwave power and liquid-solid ratio 34.02 ml g−1 for 11.12 min. The maximum extraction yield of flavonoids (rutin equivalents) was 80.78±0.52%. Compared with conventional extraction method, the microwave-assisted extraction was more efficient as the extraction time was only 6.18% of conventional extraction, but the extraction yield of flavonoids was increased by 5.47%. The main flavonoid components from the young barley leaf extract were probably 33.36% of isoorientin-7-O-glueoside and 54.17% of isovitexin-7-O-glucoside, based on the HPLC-MS analysis. The barley leaf extract exhibited strong reducing power as well as the DPPH radical scavenging capacity.
6	Summary	The extract exhibited strong reducing property as well as the DPPH radical scavenging activity. The results indicated that the young barley leaves are a good source of flavonoids and could be developed as functional foods/nutraceuticals.
7	Article Published Date	07/02/2017.
8	Study Type	Invitro.
9	Substances	Barley grass.
10	Diseases	Oxidative demage.
11	Pharmacological Actions	Antioxidant.
12	Link	https://goo.gl/3urj4W