secondary carbon

In this paper,the data about the liquid-liquid equilibrium(LLE) of sec-butanol-water-KF and sec-butanol-water-K_2CO_3 systems are measured at 25℃,showing that the sec-butanol phase contains negligible salt and the water phase contains negligible sec-butanol when the mass fraction of KF or K_2CO_3 in the water phase is not less than 26.

文中通过实验测定了仲丁醇-水-氟化钾、仲丁醇-水-碳酸钾体系在25℃时的液-液相平衡数据,发现当水相中氟化钾或碳酸钾含量分别大于或等于26。

Determination of Geniposidic Acid and Chlorogenic Acid in Male Flowers and Related Products of Eucommia ulmoides by Reversed-Phase High Performance Liquid Chromatography;

反相高效液相色谱法同时分离测定杜仲雄花及其产品中的京尼平苷酸和绿原酸

Isolation of total glycosides and flavonoids from Eucommia ulmoides leaf by macroporous resin;

大孔吸附树脂一次性分离杜仲叶中杜仲总苷和杜仲黄酮的研究

Browning Control Technology of the Liquid Extract from Eucommia ulmoides Leaves;

杜仲汁浸提及褐变控制技术研究

In this review with 33 references,recent advances in the synthesis of secondary amine were summarized,including the methods of direct N-alkylation,reductive amination,benzisoxazoles and 2-hydroxybenzaldoximes reduction,three-phase reaction,protection-alkylation-deprotection and asymmetric boronic esters.

介绍了近10年来合成仲胺的新方法,包括直接N-烷基化法,还原胺化法,苯并异噁唑类和2-羟基苯甲醛肟类的还原,三相反应法,保护-烷基化-去保护和不对称硼酸酯法。

Meanwhile the applications of secondary amine,diamine,polyamine and their derivatives were summarized also.

重点综述了高级脂肪伯胺和叔胺的应用,主要是在制备阳离子表面活性剂、非离子表面活性剂和两性表面活性剂等方面的应用;同时概述了仲胺、二胺、多胺及其衍生物的应用。

And secondary amine and tertiary amine are also discussed.

综述了吡啶类衍生物、喹啉类衍生物等杂环含氮化合物,仲胺以及叔胺被氧化成为相应的氮氧化合物的方法。

Foreign trade and arbitration of int ernational commerce;

对外贸易与国际商事仲裁

Research and Realization based on the identity authenticity of arbitration in real-time verification mechanism;

基于仲裁的身份真实性实时确认机制的研究与实现

New constructions of equitable authentication codes with arbitration;

可仲裁的公平认证码的新构造

Study on Seasonal Variation of Eucommiol in Eucommia ulmoides leaves

杜仲叶中杜仲醇含量的季节变化研究

Extaraction of Rubber from the Seed Shells of Eucommia ulmoides

从杜仲翅果中提取杜仲胶的工艺研究

Hydrolysis of Plant Cell Wall of Eucommia ulmoides by Cellulase and Extraction of Long Silk Gum

酶水解杜仲纤维素细胞壁及长丝杜仲胶的提取

Study on the Dynamic Change of the Content and Molecular Weight and Molecular Weight Distribution of the Gutta-Percha in Organs of Eucommia Ulmoides Oliv

杜仲不同器官杜仲胶含量、相对分子质量及其分布的动态研究

Gamete and Zygote Chromosome Doubling of Eucommia Ulmoides Oliv;

杜仲配子与合子染色体加倍技术研究

Extraction and Microencapsulation Technology of Eucommia Seed Oil;

杜仲籽油的提取及微胶囊化技术研究

Determination and discussion on the biosynthesis of Photogenic Acid in the Eucommia ulmoides Olive;

杜仲叶中绿原酸的生物合成机理探究

Research on Quality and Fingerprint of Folium Eucommia of ChongQing

重庆产杜仲叶的质量及指纹图谱研究

Sexual Hybridization and Establishment of Mapping Population in Eucommia Ulmoides Oliv.

杜仲有性杂交与遗传作图群体的建立

Effects of frozen in jury in flowering period on nutritional composition of Eucommia ulmoides pollen

花期冻害对杜仲花粉营养成分的影响

Minerals in Male Flower of Eucommia ulmoides

杜仲雄花中矿质元素含量分析与评价

Fast Test of Vitality and Germination Rate of Eucommia Seeds

杜仲种子生命力与萌发率的快速测定

Tissue Culture and Cloning of Hybride Seeds of Eucommia ulmoides

杜仲杂交子代的组织培养及无性系化

Antioxidant activity of endophytic Chaetomium globosum from Eucommia ulmoides

杜仲内生球毛壳菌的抗氧化活性研究

The Influence of Different Process Technics on the Contents of Chlorogenic Acid in Eucommia Ulmoides Oliv

炮制方法对杜仲中绿原酸含量的影响

Application on the Purification Flavoniods from Eucommia ulmoides by Macroporous Resin

大孔树脂在纯化杜仲总黄酮中的应用

The determination of geniposide in folium cortex eucommia by RP-HPLC

RP-HPLC测定杜仲叶京尼平苷的含量

Identification of Common Chinese Medicine

杜仲 白鲜皮 防己 冬虫夏草的真伪鉴别