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- bicyclic diterpenen 双环二萜
- Bicyclic point lower right symbol, another jewelry back intact. 点右下双环符号,另珠宝回复原样。
- Shenyanglink, bicyclic, the entire three-ring are the number ah?? 沈阳一环，二环，三环的全程分别是多少啊？？？
- Monocyclic compounds yield is up to 95% as bicyclic comp... 当双环裂解率达70%25时,单环收率仍可达95%25。
- Aim: To sythesize pentanoate and hexanoate of caged bicyclic phosphate. 目的：合成笼状双环磷酸酯的戊酸酯及己酸酯衍生物。
- Aim:To sythesize pentanoate and hexanoate of caged bicyclic phosphate. 目的:合成笼状双环磷酸酯的戊酸酯及己酸酯衍生物。
- Aim: To synthesize carboxylate derivatives of caged bicyclic phosphate. 目的:合成笼状双环磷酸酯的羧酸酯衍生物。
- Abstract： Aim: To sythesize pentanoate and hexanoate of caged bicyclic phosphate. 摘 要： 目的：合成笼状双环磷酸酯的戊酸酯及己酸酯衍生物。
- Aim To develop a concise method for the synthesis of bicyclic azasugar and thiosugar with novel scaffold. 目的发展一种简洁合成具有新型骨架的双环氮杂糖和硫杂糖的新方法。
- Results Two bicyclic azasugars and a thiosugar were produced from L-sorbose in several steps. 结果经几步反应成功地从L-山梨糖合成了三种双环氮杂糖和硫杂糖。
- The GC/MS analyses of oil samples from QHD32-6 oilfield show that bicyclic sesquiterpanes are abundant. 摘要色谱/质谱分析结果表明，秦皇岛32-6油田原油中含有丰富的双环倍半萜。
- Linear Time Algorithms to the Minimum AllOnes Problem for Unicyclic and Bicyclic Graphs, Electronic Notes in Discrete Math., 17 (2004), 93-98. 基于模糊数学集合的数字图像模糊度;计算机辅助设计与图形学学报;14(2002).
- Oung, J.-N. Wu, S.-H. and Juang F.-S. (2003) Bicyclic Sesquiterpanes in Tertiary Coals from Taiwan. Petroleum Geology of Taiwan, 36, 53-72. 翁荣南、吴素惠、庄福森(2003)台湾第三纪煤样中的二环倍半?烷。台湾石油地质，36号，第53-72页。
- A crowd of bicycl ist are resting and to chat ting on the distant grassplot. on the grass some distance away. 一帮竞速车选手坐在远处的草地上休息聊天。
- Methods: Chloroform being solvent,under bath heat, 4-hydroxymethyl caged bicyclic phosphate acylated with pentanoyl chloride and hexanoyl chloride dividedly. 方法：用氯仿作溶剂，在浴温条件下，4-羟甲基笼状双环磷酸酯分别与戊酰氯、己酰氯发生酰化反应。
- Andrographolide,a bicyclic diterpenoid lactone(C20H30O5),is one of principal components isolated from the traditional Chinese herb Andrographis paniculata. 穿心莲内酯为爵床科植物穿心莲中提取得到的二萜内酯类化合物,分子式为C20H30O5,是中药穿心莲的主要有效成分之一。
- The results revealed that the components with bicyclic ortho ester had expansibility in the ring opening polymerization by initiation of cationic compounds. 对膨胀聚合反应研究发现,带有膨胀基团双环原酸酯的材料在阳离子引发剂存在下开环时具有膨胀特性。
- Methods:Chloroform being solvent,under bath heat,4 hydroxymethyl caged bicyclic phosphate acylated with pentanoyl chloride and hexanoyl chloride dividedly. 方法:用氯仿作溶剂,在浴温条件下,4羟甲基笼状双环磷酸酯分别与戊酰氯、己酰氯发生酰化反应。
- Results and Conclusion: Six carboxylate derivatives of caged bicyclic phosphate were synthesized.The products were identified by elementary analysis and IR data. 结果与结论:合成了6种笼状双环磷酸酯的羧酸酯衍生物,通过元素分析及红外光谱数据证实产物结构。
- A new kind of bicyclic ortho ester,4-( hydroxymethyl)-2.6,7- trioxabicyclo[2.2.2] octane was synthesized by the reaction between trimthyl orthoformate and pentaerythritol without catalyst. 由原甲酸三乙酯与季戊四醇为原料制备了一种双环原酸酯4-羟甲基-2,6,7-三氧杂二环(2,2,2)烷,并提供了一条简单可行的合成途径。
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