Chemical characterization and antioxidative properties of Polish variety of Morus alba L. leaf aqueous extracts from the laboratory and pilot-scale processes

• 作者: Eugeniusz Korbas Ewa Flaczyk Joanna Kobus-Cisowska Jozef Korczak Maciej Buchowski Marian Remiszewski Monica Przeor
• 来源期刊: 农业科学(英文)
• 学科: 医学
• 关键词: MORUS ALBA Leaves Pilot Plant Scale Antioxidant Activity Phenolic Acid FLAVONOLS HPLC
• 年，卷（期）: 2013,（5）
• 页码范围: 141-147
• 页数: 7页
• 分类号: R28

摘要

White mulberry tree (Morus alba L) is cultivated throughout Asia and Europe, including Poland. The leaves and root bark preparations from Morus alba have been used in traditional phytomedicine. The objective of the present study was to compare chemical composition and antioxidative activity of aqueous extracts prepared from Polish variety of Morus alba leaves at the laboratory (L) and pilot plant scale (PP) conditions. Proximate composition, phenolic acids profile (HPLC/MS), flavonol glicosides (HPLC/ MS), polyphenols (Folin-Ciocalteu assay), and the antioxidant activity (ABTS and DPPH assay) of the extracts were determined. The main phenolic compounds were identified as gallic, protocatechuic, phydroxybenzoic, vanillic, chlorogenic, caffeic, p-coumaric, ferulic, and sinapic acids. Chlorogenic acid was the main phenolic constituent of both extracts. The flavonols fraction contained rutin, quercetin 3-β-D-glucoside, and kaempferol 3-β-D- glucopyranoside. Total concentration of phenolic compounds were 7.9 g and 14.4 g gallic acid equivalent/100 g extract, and antioxidant activity was 137.1 and 214.1 μMol Trolox equivalent/g dry weight for the PP and L extracts, respectively. We concluded that current pilot plant process is less efficient than laboratory process at the aqueous extraction of bioactive components from Morus alba dried leaves. Potential improvements may include increasing efficacy of the extraction, decreasing losses of bioactive components during the process, or both.