Amabiose, a new disaccharide derivative with a novel skeleton, was isolated from the rhizomes of Hemsleya amabilis .
从圆果雪胆的块茎中分离出一个结构新颖的双糖 雪胆双糖 (amabiose) ,应用DEPT、1 H 1 HCOSY ,HMQC等NMR多种核磁技术 ,对其结构进行研究 ,再经X ray单晶衍射实验确证其化学结构是一分子葡萄糖和一分子雪胆糖缩合而得 ,本文报道了雪胆双糖的NMR碳氢化学位移完全解
The novel successfully creates two heroines Yukiko and Taeko with distinctive peculiar personalities.
《细雪》是日本现代著名作家谷崎润一郎的长篇名作,小说成功地塑造了个性鲜明的主人公雪子和妙子的形象。
Because there is no an ideal model to describe the gas discharge,the electron avalanche is considered as the basic process in gas discharge.
针对目前气体开关仿真模型不能客观反映亚纳秒气体开关放电物理过程的问题,提出了一种电子雪崩过程仿真模型。
The atmospheric pressure discharge in an air gap between two dielectric barrier electrodes has been studied experimentally and the development of an electron avalanche in such an air gap was simulated numerically.
利用介质阻挡电极结构 ,对 1 0 132 5× 10 5Pa气压下空气间隙中的放电进行了实验研究 ,数值模拟计算了实验条件下电子雪崩的发展过程 。
Transient response of photon avalanche, IOB and influence of system parameters on IOB are studied numerically.
根据系统的非线性速率方程理论,推导出了稳态近似下雪崩阈值的解析表达式,数值研究了光子雪崩动力学响应、本征光学双稳性以及系统参数对光学双稳态的影响等。
A model of the photon avalanche in a four level coupled system is proposed.
提出了四能级耦合系统的光子雪崩上转换模型。
Studies on Leaf Tissue Culture and Plant Regeneration of Saussurea gossypiphora D Don;
雪兔子叶的组织培养及植株再生
The essential oil was extracted from the whole plants of Saussurea gossypiphora by steam distillation.
采用水蒸汽蒸馏法提取雪兔子中的挥发油,用气相色谱-质谱联用技术对其化学成分进行分析,共鉴定出27个化合物,其含量占挥发油总量的85。