Antimicrobial activity and physical properties of chitosan-tapioca starch based edible films and coatings

被引：310
作者：
Vasconez, Maria B. [2 ]
Flores, Silvia K. [1 ,3 ]
Campos, Carmen A. [1 ,3 ]
Alvarado, Juan [2 ]
Gerschenson, Lia N. [1 ,3 ]
机构：
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ind, RA-1428 Buenos Aires, DF, Argentina
[2] Univ Tecn Ambato, Fac Ciencia & Ingn Alimentos, Ambato, Ecuador
[3] Consejo Nacl Invest Cient & Tecn CONICET Republ, Buenos Aires, DF, Argentina
来源：
FOOD RESEARCH INTERNATIONAL | 2009年 / 42卷 / 07期
关键词：
Chitosan; Starch; Edible films and coatings; FRAGARIA X ANANASSA; IMPROVE; QUALITY; FRESH; SPOILAGE; CHITIN; FRUIT; FISH;
D O I：
10.1016/j.foodres.2009.02.026
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
Antimicrobial activity of edible coating solutions based on chitosan and blends of chitosan-tapioca starch with or without potassium sorbate (KS) addition was studied. The agar well diffusion assay showed an antagonist effect on the efficiency of chitosan against Lactobacillus spp. when KS and/or tapioca starch were present. A salmon slice coating assay showed that the chitosan solution was the best coating since aerobic mesophilic and psychrophilic cell counts were reduced, pH and weight loss remained acceptable throughout refrigerated storage, extending global quality to 6-days. Chitosan-tapioca starch based films reduced Zygosaccharomyces bailii external spoilage in a semisolid product but were not effective against Lactobacillus spp. The results suggest that antibacterial action depended on the application technique, due to the fact that chitosan is more available in a coating solution than in a film matrix. Interactions between chitosan-starch and/or KS could affect film physical properties and the antimicrobial activity of chitosan. The addition of chitosan reduced water vapor permeability and solubility of starch films. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：762 / 769
页数：8
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