5,6-二氢-1,3,5-二噻嗪类食用香料研究进展

5,6-二氢-2,4,6-三取代基-1,3,5-二噻嗪是一类重要的含硫含氮杂环香料化合物,目前从食品中鉴定出的已经有70种左右。由于这类香料化合物具有典型的烤香、肉香、坚果香、蔬菜香等香气特征,有的已经被我国及世界上多个国家批准用来调配食用香精,用于食品加香,如2,4,6-三甲基-5,6-二氢-4H-1,3,5-二噻嗪、2(4)-异丁基-4(2),6-二甲基-5,6-二氢-4H-1,3,5-二噻嗪、2,4-二甲基-4H-吡咯[2,1-d]-1,3,5-二噻嗪等。本文对67种5,6-二氢-2,4,6-三取代基-1,3,5-二噻嗪类香料化合物的天然存在和香气特征进行了归纳;由于在食品基质中这类化合物的形成与多种因素有关,如梅拉德反应、脂肪的氧化、Strecker降解、pH、温度等,因此有必要对其在食品热加工过程中的形成机理进行研究和总结;考虑到1,3,5-二噻嗪类化合物在香料工业中的潜在价值,本文也对文献报道的该类化合物的合成方法进行了概括。     

中国的金万年世界的金万年——上海金万年实业发展有限公司

机遇源于努力成就来自远见在这金碧辉煌的时代,在这万物峥嵘的岁月,金万年集团依托伟大祖国改革开放和市场经济腾飞的机遇,在经济全球化的世界文具丛林中迎风傲立。“创金色品牌,做万年企业”是金万年“文具航母”行驶的方向,也是金万年人永不折挠,努力拼搏,     

由α-蒎烯合成甜味剂1,8-对(艹孟)二烯-7-肟

本文讨论了以松节油为原料采用微波辐照相转移化技术和“一锅煮”等新技术合成1,8-对二烯-7-肟的方法和工艺技术条件,并对产品进行物理性质和Uv、IR、MS等的测定。结果表明,采用本法总收率可达到62.3%。     

Effect of genotype and cultivation location on β-sitosterol and α-, β-, γ-, and δ-tocopherols in sorghum

This study aims to examine variations in β-sitosterol and α-, β-, γ-, and δ-tocopherol composition and content in sorghum grains with different genotypes and cultivation areas (Wonju and Miryang in Korea). β-Sitosterol content was found to be higher in Wonju sorghum; however, total tocopherol content was found to be higher in Miryang sorghum. Moreover, the β-sitosterol content did not correlate with physical characteristics, including 100-seed weight and color values (L, a, and b), but it was negatively correlated with total tocopherol content. β-Tocopherol was a major tocopherol in sorghum, constituting approximately 40%–46% of the total tocopherol content, and it was highly correlated with the total tocopherol content. Furthermore, the α-tocopherol content also increased with increasing γ-tocopherol content. Among the 4 tocopherols, only δ-tocopherol content correlated with physical characteristics of sorghum grain. This study deepened our knowledge of the variations in β-sitosterol and α-, β-, γ-, and δ-tocopherol content in sorghum with respect to genotype and cultivation location. In addition, this study demonstrated a correlation between some physical characteristics of sorghum and β-sitosterol/tocopherol content, and this information can be useful for breeding programs that develop or breed sorghum varieties or manufacture sorghum-based foods containing high amounts of β-sitosterol and tocopherols.