PDF(Pubmed)
Abstract：
The presence of high unsaturated fat content and polyphenols results in the short storage life of fresh walnut kernels. For prolonging their shelf life, edible coatings incorporated with antimicrobial compounds can be used as a tool. Quince seed mucilage was identified as a novel green biomaterial to be explored as a coating substance. Quince seed mucilage and sodium alginate were mixed in five different proportions of 100:0 (QAH1), 80:20 (QAH2), 60:40 (QAH3), 40:60 (QAH4), and 20:80 (QAH5) and the resultant composite hydrogels were studied for different physical properties. These composite hydrogels incorporated with vanillin were coated on fresh walnut kernels while uncoated samples served as control. Composite hydrogel coatings with a higher proportion of QSM retained a higher whiteness index, lightness (L*), DPPH radical scavenging capacity, total phenolic content, and overall acceptability values in walnut kernels during the entire storage period of 35 days. QAH1 showed the lowest weight loss percentage, lipid oxidation, and yeast and mold counts while the control sample showed the highest (P < 0.05) values. The results concluded that quince-based composite hydrogel coatings were effective in retention of quality and prevention of degradation of fresh walnut kernels during the storage.
UNASSIGNED:
UNASSIGNED:
摘要：
高不饱和脂肪含量和多酚的存在导致新鲜核桃仁的储存寿命短。为了延长保质期，与抗微生物化合物结合的可食用涂层可以用作工具。Quince种子粘液被确定为一种新型的绿色生物材料，可作为涂层物质进行探索。Quince种子粘液和海藻酸钠以100：0（QAH1）的五种不同比例混合，80:20(QAH2),60:40(QAH3),40:60(QAH4),和20：80（QAH5），并研究了所得复合水凝胶的不同物理性质。将这些掺入香草醛的复合水凝胶涂覆在新鲜的核桃仁上,而未涂覆的样品用作对照。具有较高比例QSM的复合水凝胶涂层保留了较高的白度指数，亮度（L*），DPPH自由基清除能力,总酚含量，在35天的整个贮藏期间，核桃仁的总体可接受性值。QAH1显示出最低的体重减轻百分比，脂质氧化，以及酵母和霉菌计数,而对照样品显示最高(P<0.05)值。结果得出结论，基于木瓜的复合水凝胶涂层在储存过程中可以有效地保持质量并防止新鲜核桃仁的降解。
