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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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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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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
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以草莓果浆冻干过程中VC、草莓红色素和冻干时间为指标,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26 Pa,装料厚度7 mm。最佳工艺条件下,VC、草莓色素的损失率分别为6%和38%,冻干时间为18 h。 相似文献
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臭氧在纸浆漂白中的应用 总被引:2,自引:0,他引:2
简要介绍臭氧漂白的背景,臭氧的性质,臭氧漂白的机理及其工艺条件。随着臭氧漂白工艺的日趋成熟,臭氧作为TCF漂白中的一种漂白技术,将对造纸工业无氯漂白的发展有重要意义。 相似文献