Development of gelatin-sodium caseinate high-oxygen-barrier film containing elderberry(Sambucus nigra L.)extract and its antioxidant capacity on pork  

作　　者：Jieun Choi Jung-Soo Lee Jaejoon Han Yoonjee Chang 

机构地区：[1]Department of Food and Nutrition,College of Science and Technology,Kookmin University,Seoul,02707,Republic of Korea [2]Department of Biotechnology,College of Life Sciences and Biotechnology,Korea University,Seoul,02841,Republic of Korea

出　　处：《Food Bioscience》2023年第3期1192-1199,共8页食品生物科学（英文）

基　　金：carried out with the support of“Cooperative Research Program for Agriculture Science&Technology Development(PJ01608201)”,Rural Development Administration,Republic of Korea.

摘　　要：The use of biodegradable polymers and natural additives is a sustainable strategy to prevent oxidation and extend food shelf life.In this study,a gelatin-sodium caseinate composite film containing elderberry extract was newly developed and characterized.The film with the most optimal oxygen permeability and water vapor permeability was selected by blending gelatin(G)and sodium caseinate(S)at a 50:50 ratio(w/w).The addition of 0.5%(w/w)elderberry extract(EE)improved the oxygen barrier properties and gave the edible film a high potential for food quality preservation.Elongation was improved(105.82%±9.36%)and DPPH radical scav-enging analysis revealed a significantly strong antioxidant activity(P<0.05).FT-IR spectra and SEM indicated that it is the result of polyphenols and other EE components interacting with the protein matrix.The developed film was applied as a coating and significantly prevented weight loss of pork after 12 h at room temperature(Control,0.18%±0.01%;G50:SC50,0.11%±0.01%;G50:SC50+EE0.5,0.11%±0.02%;P<0.05).The EE-containing G50:SC50-coated pork showed the lowest lipid oxidation as measured by TBARS after 36 h(0.36±0.06 mg MDA/kg sample).This finding suggested that it was related to polymorphic mechanisms,including radical scavenging and oxygen contact blocking.Therefore,protein-based films containing natural extract have the potential for an antioxidant packaging strategy.

关 键 词：GELATIN Sodium caseinate ANTIOXIDANT Elderberry extract Oxygen permeability 

分 类 号：TS251.51[轻工技术与工程—农产品加工及贮藏工程]