Pressure-assisted thermal sterilization of avocado puree in high barrier polymeric packaging
Pressure-assisted thermal sterilization of avocado puree in high barrier polymeric packaging
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DOI：
10.1016/j.lwt.2021.112960
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发表时间：
2021-12-17
影响因子：
6
通讯作者：
Sablani, Shyam S.
中科院分区：
文献类型：
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作者：
Al-Ghamdi, Saleh;Sonar, Chandrashekhar R.;Sablani, Shyam S.
本研究的目的是研究压力辅助热杀菌(PATS)对聚合物包装和包装牛油果果泥性能的影响。高压为600兆帕，初始容器温度为90摄氏度，处理时间超过5分钟。我们使用了两个高阻隔性薄膜袋：A-膜(PE/PA6//EVOH//PA6/PE)和B-膜(ALOX涂层PET//ALOX涂层PET//PA//CPP)。处理后A膜的透氧率从0.16+/-0.07变化到3.24+/-0.52 cm(3)/m(2)·d，而B膜的透氧率从3.72+/-0.06变化到4.97+/-0.14 g/m(2)·d；涂膜后，包装牛油果果泥中的溶解氧从21%降至3%。降低包装牛油果中的氧气水平可能有助于延长其货架期。介电性能和X射线衍射有助于解释PATS引起的薄膜阻挡性能的变化。PATS处理后，总叶绿素、绿度和亮度均显著降低(p<；0.05)。PATS后硫代巴比妥酸活性降低。PATS显示出生产货架稳定的鳄梨泥的潜力；然而，需要货架期研究来进一步开发PATS工艺。
The aim of this study was to examine the influence of pressure-assisted thermal sterilization (PATS) on properties of polymeric packaging and packaged avocado puree. High pressure of 600 MPa and initial vessel temperature of 90 degrees C were used over 5 min processing time. We used two high barrier film pouches: Film A-(PE/PA6//EVOH//PA6/PE) and film B-(AlOx-coated PET//AlOx-coated PET//PA//CPP). Oxygen transmission rates (OTR) changed from 0.16 +/- 0.07 to 3.24 +/- 0.52 cm(3)/m(2).day for film A after processing while OTRs were not detected for film B. Water vapor transmission rates (WVTR) changed from 3.72 +/- 0.06 to 4.97 +/- 0.14 g/m(2).day for film A and 0.11 +/- 0.02 to 0.62 +/- 0.0.6 g/m(2).day for film B. The dissolved oxygen in packaged avocado puree reduced from 21% to 3% after PATS for both films. Reduced oxygen level in packaged avocado may help extend its shelf life. Dielectric properties and X-ray diffraction helped explain PATS induced changes in film barrier properties. The total chlorophyll, greenness, and lightness decreased significantly (p < 0.05) after PATS. The thiobarbituric acid activity reduced after PATS. PATS showed potential to produced shelf-stable avocado puree; however, shelf-life studies are needed to further develop PATS process.