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Shellac-based coatings were developed in combination with starch, EDTA and sodium alginate and were evaluated for shelf-life extension of fresh green chillies during storage at ambient temperature (26 ± 2 °C, RH 68 ± 4%) for 12 days. The developed composite coatings were found to be effective in extending the shelf-life of chillies. The control samples showed a higher weight loss (12.35%) compared to coated ones (5.60-6.90%). The coated samples showed significantly (p < 0.05) higher retention of ascorbic acid, firmness and chlorophyll content, whereas, total phenolic content was found to be significantly (p < 0.05) higher in uncoated samples after 12 days of storage. Shellac-sodium alginate based coating was found to be the most effective in maintaining the quality of fresh green chillies during ambient storage as compared to other coatings. 相似文献
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漂白胶贮存性质的研究(二报)——紫胶树脂在漂白过程中性质变化的研究 总被引:1,自引:0,他引:1
本文研究了紫胶树脂在漂白和脱氯过程中分子量、热寿命、酸价、碘价、羟基值和氯含量的变化情况。结果证明:漂白过程中,氯主要以自由基加成的方式进入紫胶树脂,同时还有氯的自由基取代和树脂上醛基、伯羟基的氧化反应。在脱氯过程中,漂白胶树脂上大部分危害其贮存性的结合氯被除去,这些氯通过消去和取代反应脱离树脂,同时产生双键和羟基。脱氯后仍残留在紫胶树脂上的氯相当稳定,难以自行脱落,经过脱氯处理,漂白胶具备了片胶所具备的优良性质。 相似文献
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中间试验规模为小试规模的667倍(0.5吨/锅)。采用常压与减压相结合、回收丁醇直接循环使用的一步法合成工艺,验证了工艺条件的稳定性;考核了选用的生产装置的适用性和生产规模的技术、经济可行性。实验结果表明:工艺完善,设备合理,产品技术性能稳定,可代替40—50%的紫胶。改性紫胶价格仅为普通紫胶价格的60%,技术经济效益良好,可按中试规模或进一步扩大规模实施生产。 相似文献
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含纳他霉素天然保鲜果蜡的制备与应 总被引:2,自引:0,他引:2
研究了不同助剂对紫胶保鲜蜡物理性能和纳他霉素对保鲜蜡抑菌性能的影响.确定了含纳他霉素的天然保鲜果蜡的生产工艺为:紫胶120 g/L、吗啉20 mL/L、丙二醇10 mL/L、氨水12 mL/L,乳化时间30 min,当温度降至60℃时加入0.6 g/L的纳他霉素.应用该保鲜果蜡贮藏的胡柚和锦橙,在温度为5~10℃,相对湿度为60%~65%条件下贮藏45 d,能较好地保持果实的外观,表面新鲜饱满,有光泽,品质好,与对照相比失重率降低70%,好果率提高65%. 相似文献
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