高密度CO_2处理对鲜枣汁微生物和部分理化特性的影响  

Effect of dense phase carbon dioxide on the microorganisms and some physical and chemical characterization of the fresh dates juice

作　　者：纵伟[1] 曹益恒[1] 赵光远[1] 张培旗[1] 李昌文[1] 石勇 

机构地区：[1]郑州轻工业学院食品与生物工程学院,郑州450002 [2]好想你枣业股份有限公司,郑州450000

出　　处：《食品科技》2013年第12期34-36,40,共4页Food Science and Technology

基　　金："十二五"国家科技支撑计划项目(2012BAD36B07);河南省科技攻关项目(122102110135)

摘　　要：为探讨高密度CO2(DPCD)对鲜枣汁微生物和理化特性的影响,将鲜枣汁经DPCD(30 MPa、40℃、60 min)处理后,研究其储藏期微生物数量、浊度、总酚、Vc含量等指标的变化。结果表明:DPCD处理的鲜枣汁在储藏8周内,微生物数量符合国家食品卫生标准要求,浊度有所增加,总酚和Vc下降抑制明显。DPCD处理既能达到杀菌的目的,同时对鲜枣汁质量具有很好的保护效果。Based on the optimal velocity car-following model, in this paper, we propose an improved model for simulating train movement in an urban railway in which the regenerative energy of a train is considered. Here a new additional term is introduced into a traditional car-following model. Our aim is to analyze and discuss the dynamic characteristics of the train movement when the regenerative energy is utilized by the electric locomotive. The simulation results indicate that the improved car-following model is suitable for simulating the train movement. Further, some qualitative relationships between regenerative energy and dynamic characteristics of a train are investigated, such as the measurement data of regenerative energy presents a power-law distribution. Our results are useful for optimizing the design and plan of urban railway systems.

关 键 词：高密度CO2 鲜枣汁 微生物 理化特性 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]