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ε-聚赖氨酸复配防腐剂在酱腌菜中的应用 总被引:1,自引:0,他引:1
为延长酱腌菜保质期,研究ε-聚赖氨酸(ε-ploy-L-lysine,ε-PL)与其他防腐剂和抗氧化剂复配对酱腌菜的防腐效果。结果表明,生物防腐剂乳酸链球菌素(Nisin)、纳他霉素和抗氧化剂茶多酚对酱腌菜中的腐败微生物有很好的抑制作用,并且同时使用具有协同增效的作用。通过响应面法复配防腐剂各成分配比为:ε-PL?0.06?μg/mL、Nisin?0.06?μg/mL、纳他霉素0.035?μg/mL和茶多酚0.40?μg/mL。经验证在酱腌菜拌料时添加复配防腐剂比在干制萝卜复水时添加防腐剂效果更好,可以延长其保质期至21?d,品质较好,总菌落数、大肠菌群数、总酸及氨基酸态氮含量符合国家标准,为ε-PL在酱腌菜中的应用提供了理论支持。 相似文献
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乳酸链球菌素和纳他霉素都属于抗菌剂。本文分别介绍了乳酸链球菌素和纳他霉素的结构、理化性质,扼要的介绍了他们抑菌机理及使用安全性,对于他们在肉品中的防腐保鲜应用作了系统的阐述。 相似文献
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Frozen (–18°C) de-seeded kiwifruit pulp (Actinidia deliciosa) was irradiated at a dose of 100 krad and stored at -18°C. Irradiation resulted in a 2.11 log10 reduction in aerobic plate count (APC) with bacteria being most susceptible. Molds were less susceptible than yeasts. Assessments carried out over 6 months storage showed no significant differences in physical, chemical and sensory properties between irradiated and nonirradiated pulps. The microbial populations of the pulps decreased in parallel throughout the storage period. Frozen storage without irradiation resulted in a 3 log10 reduction in APC over the 6 months period, a 38% reduction in ascorbic acid, and a slight loss of color. Three days frozen storage (– 18°C) following irradiation resulted in an APC only 0.89 log10 higher than 6 months frozen storage (- 18°C) without irradiation with potential savings in energy and holding times which could have economic benefits. 相似文献
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猕猴桃果浆真空冷冻干燥工艺优化研究 总被引:5,自引:0,他引:5
以猕猴桃果浆冻干过程中VC、叶绿素损失率和冻干时间为指标,对真空冷冻干燥过程进行优化,得到的最佳工艺参数为:物料解吸时的表面最高温度48℃,升华初始干燥仓压力26Pa,装料厚度7mm。最佳工艺条件下,VC、叶绿素的损失率预报值分别为6%和38%,冻干时间为18h。 相似文献
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Factors Influencing the Stability of Frozen Kiwifruit Pulp 总被引:1,自引:0,他引:1
J. A. VENNING D. J. W. BURNS K. M. HOSKIN T. NGUYEN M. G. H. STEC 《Journal of food science》1989,54(2):396-400
The biochemical, sensory, and quality changes that occur during processing and prolonged frozen storage of kiwifruit pulp were studied. The temperature and processing time during pulp manufacture and freezing are critical factors in determining the % total chlorophyll and color of the frozen pulp. Storage of pulp at acceptable commercial frozen storage temperatures (?18°C or below) for 12 months resulted in a stable color, and a slight decrease in the % total chlorophylls and ascorbic acid. The type of packaging material used and deaeration of pulp did not influence the above findings. The sensory qualities of the pulp were not affected by the storage conditions. 相似文献
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以野生猕猴桃为原料研制猕猴桃干酒,对果酒酿造工艺参数进行研究。结果表明,果酒酵母1596 适于用作酿制猕猴桃干酒的发酵菌种;果酒发酵最佳工艺参数为SO2 添加量50mg/L、酵母接种量8%、发酵温度18~22℃;降酸工艺:壳聚糖(11g/L)、酒石酸钾(6g/L)联合降酸效果为佳;澄清工艺:果胶酶(质量分数0.1%)与皂土(3g/L)一同添加效果较好,澄清48h,透光率为94.5%。 相似文献
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本文对猕猴桃果脯制作工艺进行优化,采用单因素实验探究了不同护色剂种类、硬化剂浓度和不同烫漂时间对猕猴桃果脯色度、硬度及总糖含量的影响,并利用Box-Behnken Design中心组实验设计,对渗糖时间、干燥时间和干燥温度进行响应面优化,研究各自变量及其交互作用对猕猴桃果脯总糖含量及感官的影响,并得到二次多项式回归方程的预测模型。结果表明,最佳护色条件为2 g/L的柠檬酸、氯化钠和异抗坏血酸钠的混合液,其体积比例为1:1:1;硬化剂为0.8 g/L氯化钙;烫漂时间为140 s。通过回归分析,果脯制备最优条件为渗糖时间48 min,干燥时间为5 h,干燥温度为80℃。在该条件下,猕猴桃果脯总糖含量与感官评价的实际综合值为75.41,与预测值74.60符合较好。通过研究表明优化猕猴桃果脯生产工艺可明显提升猕猴桃果脯的质量。 相似文献
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以猕猴桃的保健功能以及加工技术为切入点,介绍了猕猴桃的种类、分布范围和营养价值等方面。通过综述国内外对猕猴桃的保健功能、加工技术以及发展前景等研究现状,着重的分析了猕猴桃果酒、果浆、果脯等产品的加工技术进展及其发展趋势,为推进猕猴桃产业发展及拓展市场提供借鉴。 相似文献
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为了研究不同品种猕猴桃果实制汁的品质特性,选取了全国5个地区,3个种系,12个品种猕猴桃,对其理化品质、营养成分、加工性能等22项指标进行测定,对测定结果进行描述性评价和相关性分析,运用主成分分析对不同品种猕猴桃汁进行综合评价,建立了猕猴桃制汁品质评价模型,得出12个品种综合评分值排列顺序,筛选出适宜加工制汁的品种;并用电子鼻对猕猴桃汁香气进行测定和分析,得出不同品种果实香气成分之间的差异。结果表明:软枣猕猴桃中绿迷、益玉,中华猕猴桃中脐红、华优制汁品质较好,经主成分综合得分模型计算,综合得分 F均大于0,适合做为果汁类产品的加工原料。东红、海沃德不适宜作为制汁品种,F均小于-1。12种猕猴桃果汁主要的挥发性物质为甲基类、无机硫化物、氮氧化物和芳香醇类,响应值G/G0分别为20.43、19.90、17.95、8.06。研究结果为猕猴桃果汁等加工企业选择适宜的制汁品种提供了科学依据。 相似文献
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Heat treatment of kiwifruit juice caused formation of a heavy protein precipitate. Celite filtration removed the precipitate giving a clear, heat-stable juice which could be readily concentrated and reconstituted. Hollow fibre ultrafiltration was used to clarify and nonthermally sterilize kiwifruit juice. Virtually all the soluble proteolytic enzyme, actinidin, remained in the retentate although there was some loss of enzymatic activity. Some sedimentation was observed in both conventionally prepared and ultrafiltered juices prepared in the 1980 season, but not in 1981. A procyanidin: protein haze formed immediately in certain clarified kiwifruit juice: apple juice blends. 相似文献