河南野菊花挥发油的GC/MS分析

The essential oil from the flowers of Chrysanthemum indicum in Henan was analyzed by capillary GC/MS method. Eighty-one components were separated and identified representing 93% of the total essential oil. The main chemical components were monoterpenes and sesquiterpenes, in which the content of camphor and borneol were most.     

无患子皂苷的串联质谱分析

The total saponins of Sapindus mukurossi were analyzed by tandem mass spectrometry. According to the reference, the molecular weights of 11 saponins were determined by positive and negative ions. Furthermore, seven acyclic sesquiterpene saponins were detected. On the basis of the known compounds, the possible structures of the seven acyclic sesquiterpene saponins were speculated by tandem mass spectrometry.     

齿轮高速冷滚打温度及应力分布研究

通过数值模拟和实验的方法,研究了齿轮冷滚打成形过程中温度的分布规律.论述了冷滚打成形原理,建立了其成形过程的有限元模型,对成形过程的温度分布进行了分析.结果表明:由于滚打轮和材料之间的摩擦作用,齿坯温度上升;但又因材料热传导率较高,这些综合因素使得齿坯温度上升较慢.     

窖泥中氨基酸含量及其对曲酒质量的影响(第一报)——窖泥成分对酒质的影响研究

浓香型曲酒生产离不开窖池(泥窖);泥窖的老熟程度又是决定浓香型大曲酒质量好坏的重要因素。我们在研究窖泥化学成分对酒质影响过程中,发现窖泥中蛋白质和氨基酸的含量与大曲酒质量有一定关系。关于窖泥中氨基酸含量及其对酒质影响的研究,国内尚来见报道。本文将部分研究结果报导于后。     

尼泊尔黄堇中总生物碱的串联质谱分析

采用电喷雾串联质谱(ESI-MS/MS)法对尼泊尔黄堇中总生物碱进行分析。由一级质谱中各成分的准分子离子峰获知其相对分子质量,再由二级质谱的裂解碎片推测其结构特征。结合纯品的串联质谱分析,直接鉴定出从尼泊尔黄堇总生物碱中已经分离得到的10种异喹啉生物碱成分:stylopine(1),tetrahydrothalifendine(2),tetrahydroberberrubine(3),scoulerine(4),sinactine(5),protopine(6),cryptopine(7),α-allo-cryptopine(8),9-methyl-decumbenine C(9)和6-acetonyl-5,6-dihydrosanguinarine(10);另外还初步推测出2种未从该植物中分离得到的异喹啉生物碱成分。     

伏毛铁棒锤根中总生物碱的串联质谱分析

采用电喷雾串联质谱（ESI-MSⁿ）和高分辨电喷雾质谱（HR-ESI-MS）对伏毛铁棒锤根中总生物碱进行分析。由一级质谱图获得各生物碱成分的准分子离子峰，通过高分辨质谱测出其相应的分子式，再经串联质谱获得一些分子结构信息，伏毛铁棒锤根中的5个主要生物碱成分为12-表-欧乌头碱、3-脱氧乌头碱、乌头碱、3-脱氧乌头碱-8-亚油酸酯和乌头碱-8-亚油酸酯。     

藏药打箭菊挥发油的GC/MS分析

An essential oil was extracted from the traditional Tibetan medicine of Pyrethrum tatsienense by steam distillation method. The chemical components of the essential oil were analyzed by gas chromatography-mass spectrometry(GC/MS) and 30 compounds were identified, which account for 67.5 % of the total essential oil from the flowers of P. tatsienense.