Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying

被引：22

作者：

Novakovic, Miroslav M. ^{[1
]}

Stevanovic, Snezana M. ^{[2
]}

Gorjanovic, Stanislava Z. ^{[3
]}

Jovanovic, Predrag M. ^{[2
,4
]}

Tesevic, Vele V. ^{[4
]}

Jankovic, Miodrag A.

Suznjevic, Desanka Z. ^{[3
]}

机构：

[1] Inst Chem Technol & Met, Belgrade 11001, Serbia

[2] Univ Belgrade, Dept Food Technol, Fac Agr, Belgrade 11081, Serbia

[3] Inst Gen & Phys Chem, Belgrade 11158 118, Serbia

[4] Univ Belgrade, Fac Chem, Belgrade 11000, Serbia

来源：

JOURNAL OF FOOD SCIENCE | 2011年 / 76卷 / 04期

关键词：

antioxidant activity; drying; hydrogen peroxide; polarography; raspberry; ANTIOXIDANT ACTIVITY; BERRY PHENOLICS; PLANT-EXTRACTS; DEHYDRATION; CAPACITY; STORAGE; FRUIT; ASSAY; ANTHOCYANIN; POLYPHENOL;

D O I：

10.1111/j.1750-3841.2011.02144.x

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

This study was conducted to investigate the influence of different drying treatments on antioxidant (AO) activity and phenolic content of raspberry (Rubus idaeus), cultivar Willamette. Whole raspberry fruits were dried convectively (air-drying), osmotically, and freeze-dried. Acetone-water extracts of fresh and dried raspberries were assessed for total phenolic content by standard Folin-Ciocalteau method. Two AO assays were applied, a recently developed direct current (DC) polarographic assay based on decrease of anodic oxidation current of hydrogen peroxide and widely used radical scavenge against the 1,1-diphenyl-2-picrylhydrazyl (DPPH). Strong correlation has been obtained between both AO assays and total phenolic content. In addition, some individual phenolic compounds present in raspberry have been assessed using DPPH and DC polarographic assay. Comparison and evaluation of drying methods has been based on preservation of AO activity and total phenolic content. Obtained results confirmed superiority of freeze-drying; convective drying caused slight changes while osmotic dehydration showed a significant decrease of phenolic compounds and AO activity. Practical Application Optimization of drying process could be based on surveying of AO activity.

引用

页码：C663 / C668

页数：6

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