Synthesis of 3-Methylbutanal by Strecker Reaction at Unelevated Temperature and in Acidic Systems

3-Methylbutanal was obtained by the Strecker reaction with L-leucine and D-ribose at unelevated temperature and acidic conditions. Volatile compounds from reaction systems were analyzed by solid phase microextration （SPME） coupledwith gas chromatography-mass spectroscopy （GC-MS）. The formation mechanism of 3-methylbutanal was also proposed. Various reaction conditions were investigated, including reaction time, reaction temperature, pH value and salt content of the system.

中式干腌火腿现状与现代化加工技术实践——以金华火腿为例

介绍了中国著名中式干腌火腿(金华火腿、如皋火腿、宣威火腿、恩施火腿等品种)的发展历史、基本特征、传统加工工艺与特色;以金华火腿为例,分析了传统火腿加工的工艺特点及局限性,阐述了中式干腌火腿现代化加工技术的优势,生产项目工艺参数、关键技术和投资方案,为中式干腌火腿的现代化加工技术发展路径提供理论参考。