Puganen Anna, Kallio Heikki P, Schaich Karen M, Suomela Jukka-Pekka, Yang Baoru
Food Chemistry and Food Development, Department of Biochemistry , University of Turku , FI-20014 Turku , Finland.
The Kevo Subarctic Research Institute , University of Turku , FI-20014 Turku , Finland.
J Agric Food Chem. 2018 Apr 4;66(13):3426-3434. doi: 10.1021/acs.jafc.8b00177. Epub 2018 Mar 23.
The potential for using extracts of press residues from black, green, red, and white currants and from sea buckthorn berries as sources of antioxidants for foods use was investigated. Press residues were extracted with ethanol in four consecutive extractions, and total Folin-Ciocalteu (F-C) reactive material and authentic phenolic compounds were determined. Radical quenching capability and mechanisms were determined from total peroxyl radical-trapping antioxidant capacity (TRAP) and oxygen radical absorbance capacity (ORAC) assays and from diphenylpicrylhydrazyl (DPPH) kinetics, respectively; specific activities were normalized to F-C reactive concentrations. Levels of total F-C reactive materials in press residue extracts were higher than in many fruits and showed significant radical quenching activity. Black currant had the highest authentic phenol content and ORAC, TRAP, and DPPH reactivity. Sea buckthorn grown in northern Finland showed extremely high total specific DPPH reactivity. These results suggest that berry press residues offer attractive value-added products that can provide antioxidants for use in stabilizing and fortifying foods.
研究了将黑加仑、绿加仑、红加仑和白加仑以及沙棘果的压榨残渣提取物用作食品抗氧化剂来源的潜力。压榨残渣用乙醇连续提取四次，测定了总福林-酚（F-C）反应性物质和真实的酚类化合物。分别通过总过氧自由基捕获抗氧化能力（TRAP）和氧自由基吸收能力（ORAC）测定以及二苯基苦味酰基自由基（DPPH）动力学来确定自由基淬灭能力和机制；将比活性归一化为F-C反应性浓度。压榨残渣提取物中总F-C反应性物质的含量高于许多水果，并表现出显著的自由基淬灭活性。黑加仑的真实酚含量、ORAC、TRAP和DPPH反应性最高。在芬兰北部种植的沙棘表现出极高的总比DPPH反应性。这些结果表明，浆果压榨残渣可提供有吸引力的增值产品，可为食品的稳定化和强化提供抗氧化剂。
