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- By the positron annihilation life spectrum (PALS) technique, the free volumes of chitosan and its N alkyl derivatives membranes were measured. 用正电子湮灭寿命谱(PALS)法,研究了N-烷基化壳聚糖膜的自由体积。
- alkyl derivative 烷基衍生物
- An organic derivative, such as coal or petroleum. 有机衍生物一种有机衍生物,如煤或石油
- Alkyl halides are reacted with sodium nitrite. 卤化烷与亚硝酸钠反应。
- Alkyl bromides can be produced this way. 溴化烷可以这样形成。
- An acyl derivative of hydrazine. 酰肼一种由肼衍生而来的酰
- To add one or more alkyl groups to(a compound. 使烷基化在(一种化合物)中添加一个或多个烷基团
- The invention relates to an alkyl dithio formate group polyfluorene derivative and the preparation method. 本发明涉及一种烷基二硫代甲酸脂基团的聚芴衍生物及其制备方法。
- To add one or more alkyl groups to(a compound). 使烷基化在(一种化合物)中添加一个或多个烷基团
- A mark used as a superscript to indicate the first derivative of a variable. 撇号置于右上角的符号,用以标明变量的第一个导数
- The derivative of the step is the impulse. 阶梯的导数就是脉冲。
- A derivative is defined by a limiting process. 导数是通过一个极限过程加以规定的。
- They spoke a derivative of the Malay language. 他们说一种从马来语派生的语言。
- A highly derivative prose style. 毫无创意的散文风格
- Studies on the Relationship between Standard Formation Enthalpy of Alkyl Derivatives and its Molecular Structure 烷基衍生物标准生成焓与分子结构之间关系的研究
- Keywords inductive effect index;alkyl derivatives;standard enthalpies of vaporization;calculation; 诱导效应指数;标准汽化热;烷基衍生物;计算;
- A derivative word;a derivative process. 衍生词;推导过程
- Not standing alone;derivative or dependent. 从属的,不独立的不独立存在的;衍生性的或依赖性的
- An amino - acid derivative of galactose. 半乳糖胺半乳糖的一种氨基酸衍生物
- Derivative that is thrown if the wait times out. 派生类,它在等待超时后即被抛出。