核电厂应急柴油机启动时间影响因素研究

核电厂应急柴油机启动完成(Ready)信号的发出表示柴油机启动完成,随时可以带负荷.根据核电厂应急柴油机的安全准则,Ready信号发出时间必须小于10 s.通过对岭澳核电站二期应急柴油机Ready信号时间问题的处理,研究了核电厂应急柴油机启动时间的影响因素.     

Improving Hydrophobicity of Glass Surface Using Dielectric Barrier Discharge Treatment in Atmospheric Air

Non-thermal plasmas under atmospheric pressure are of great interest in industrial applications, especially in material surface treatment. In this paper, the treatment of a glass surface for improving hydrophobicity using the non-thermal plasma generated by dielectric barrier discharge （DBD） at atmospheric pressure in ambient air is conducted, and the surface properties of the glass before and after the DBD treatment are studied by using contact angle measurement, surface resistance measurement and wet flashover voltage tests. The effects of the applied voltage and time duration of DBD on the surface modification are studied, and the optimal conditions for the treatment are obtained. It is found that a layer of hydrophobic coating is formed on the glass surface after spraying a thin layer of silicone oil and undergoing the DBD treatment, and the improvement of hydrophobicity depends on DBD voltage and treating time. It seems that there exists an optimum treating time for a certain applied voltage of DBD during the surface treatment, The test results of thermal aging and chemical aging show that the hydrophobic layer has quite stable characteristics. The interaction mechanism between the DBD plasma and the glass surface is discussed. It is concluded that CHa and large molecule radicals can react with the radicals in the glass surface to replace OH, and the hydrophobicity of the glass surface is improved accordingly.     

美拉德反应调节食物过敏反应的研究进展

近年来食物过敏发生率急剧增加,已是全球关注的公共卫生问题。美拉德反应作为食品加工和储存过程中最重要的化学反应之一,过敏原蛋白被修饰后由于结构发生了变化,必然引起致敏性改变,进而可能引发机体对于不同处理条件的抗原免疫耐受不一致,导致过敏反应。本文首先介绍了美拉德反应修饰蛋白质的过程及机理,进而解析不同影响因素调节美拉德反应终产物对致敏性的影响,最后阐述影响肠道菌群及其免疫应答机制的相关研究进行综述,并对美拉德反应作为一种尚未被完全开发和应用的加工方式进行展望。