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葡甘聚糖对青枣贮藏保鲜的研究 毕业论文

时间:2020/10/14 14:33:58  作者:  来源:  查看:0  评论:0
内容摘要: 目    录摘要1关键词1Abstract.1Key words1前言21  材料与方法41.1  试验材料41.2  试验设计41.2.1  葡甘聚糖成膜效果影响试验41.2.2  ...

目    录

摘要1

关键词1

Abstract.1

Key words1

前言2

1  材料与方法4

1.1  试验材料4

1.2  试验设计4

1.2.1  葡甘聚糖成膜效果影响试验4

1.2.2  复合型涂膜剂配方正交筛选试验4

1.3  测定指标与方法5

1.3.1  腐烂指数5

1.3.2  好果率5

1.3.3  失重率5

1.3.4  可溶性固形物(TSS)含量5

1.3.5  可滴定酸(TA) 含量5

1.3.6  维生素C含量5

2  结果与分析6

2.1  葡甘聚糖成膜效果影响试验结果6

2.1.1 浓度对葡甘聚糖成膜效果影响试验结果6

2.1.2  温度对葡甘聚糖成膜效果影响试验结果6

2.2  复合型涂膜剂对青枣贮藏保鲜效果正交试验结果6

2.3  复合型涂膜剂对青枣贮藏指标变化的影响试验结果7

3  讨论10

参考文献11

致谢12

独撰声明13

附录......................................................................1


葡甘聚糖对青枣贮藏保鲜的研究

——对青枣贮藏保鲜的研究

摘  要:本试验以葡甘聚糖为主要原料,配以抗氧化剂和防腐剂,形成复合膜,研究其对青枣的贮藏保鲜效果。试验结果表明,复合膜在一定程度上能抑制果实的腐烂,较好的保持果实的品质。复合膜的最佳配方为0.4%的葡甘聚糖,0.3%的抗坏血酸,0.02%的钠他霉素和0.4%的苯甲酸钠,常温下贮藏期可延长28天左右。贮藏第28天时,好果率为63.73 %、腐烂指数为23.25%、失重率为4.12%、可溶性固形物含量为9.26 %、可滴定酸含量为0.45%、维生素C含量为15.25mg/100g。

关键词:青枣  葡甘聚糖  品质  贮藏

Studies on the Storage and Freshness Effect of Indian Jujube Fruits by Glucomanna

Abstract:This experiment was performed using glucomanna as primary material, adding antioxidant and preservative, to form the complex film. The storage and freshness effect of Indian jujube fruits by the complex film was studied. The result indicates that the complex film delayed the fruit decay and kept its better quality to a certain extent. The optimum prescription of the complex film was 0.40% glucomanna, 0.30% ascorbic acid, 0.02%natamycin and 0.40%sodium benzoate, and storage time at normal temperature was extended to 28d. After the 28th day of storage under this condition, decay indexes was 23.25%, fresh rate was 63.73%, and weight loss rate was 4.12%. Furthermore, content of TSS, TA and Vc were 9.26%, 0.45% and 15.25mg/100g respectively.

Key words:Indian jujube  fruits  Glucomanna  Quality  Storage

葡甘聚糖对青枣贮藏保鲜的研究 毕业论文
葡甘聚糖对青枣贮藏保鲜的研究 毕业论文
葡甘聚糖对青枣贮藏保鲜的研究 毕业论文
葡甘聚糖对青枣贮藏保鲜的研究 毕业论文

  


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