Effect of hydrothermal treatment on the antioxidant properties of broccoli (Brassica oleracea var. botrytis italica) florets

被引:54
作者
Gawlik-Dziki, Urszula [1 ]
机构
[1] Univ Agr, Dept Biochem & Food Chem, PL-20704 Lublin, Poland
关键词
broccoli; phenolic compounds; antioxidant activity; boiling;
D O I
10.1016/j.foodchem.2007.12.058
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
In the extracts of fresh raw and frozen broccoli, caffeic, ferulic, sinapinic acids and kaempferol were identified. Boiling reduced the amounts of caffeic acid and kaempferol in both samples. The concentration of polyphenols was 2.69 mg/g fresh mass and 0.96 mg/fresh mass in fresh raw broccoli and frozen raw broccoli, respectively. Boiling significantly decreased the amounts of phenolic compounds in fresh broccoli (1.58 mg/g of fresh mass). In the case of frozen broccoli, boiling increased the concentration of polyphenols by 38%. Fresh broccoli extract neutralized free radicals by 19.87%. Boiling significantly reduced its antiradical activity (to 15.06%). Samples of frozen broccoli had a 27.06% antiradical ability. Boiling did not change the antiradical activity in frozen broccoli case. Hydrothermal processing significantly influenced on the ability of the extracts to inhibit the decolorization of beta-carotene emulsion. The extract of fresh broccoli had a higher activity when uncooked. Boiling seemed to increase this activity in the case of frozen broccoli samples. The results of the studies on the ability of broccoli extracts to inhibit linoleic acid autooxidation were ambiguous and depended on the method applied. No correlation was found between the content of phenolic compounds and the antioxidant activity of the extracts, regardless of the experimental variant and technique used. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:393 / 401
页数:9
相关论文
共 33 条
[1]   Simple measurement of phenolic esters in plant cell walls [J].
Beveridge, T ;
Loubert, E ;
Harrison, JE .
FOOD RESEARCH INTERNATIONAL, 2000, 33 (09) :775-783
[2]  
BRAND-WILLIAMS W, 1995, FOOD SCI TECHNOL-LEB, V28, P25
[3]   Soluble sinapoyl esters are converted to wall-bound esters in phenylalanine ammonia-lyase-inhibited radish seedlings [J].
Chen, MH ;
Gitz, DC ;
McClure, JW .
PHYTOCHEMISTRY, 1998, 49 (02) :333-340
[4]  
Clifford MN, 1999, J SCI FOOD AGR, V79, P362, DOI [10.1002/(SICI)1097-0010(19990301)79:3&lt
[5]  
362::AID-JSFA256&gt
[6]  
3.0.CO
[7]  
2-D, 10.1002/(SICI)1097-0010(19990301)79:3<362::AID-JSFA256>3.0.CO
[8]  
2-D]
[9]   COMPARISON OF THE ANTIOXIDATIVE ACTIVITY OF SOME ACID-PHENOLS - STRUCTURE ACTIVITY RELATIONSHIP [J].
CUVELIER, ME ;
RICHARD, H ;
BERSET, C .
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY, 1992, 56 (02) :324-325
[10]   Anti- and prooxidant activity of water soluble components of some common diet vegetables and the effect of thermal treatment [J].
Gazzani, G ;
Papetti, A ;
Massolini, G ;
Daglia, M .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1998, 46 (10) :4118-4122