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- Abstract: A high performance liquid chromatography (HPLC) method for determing the 2,4-/2 ,6- isomer ratio in commercial. toluene diisocyanate (TDI) was developed. 文摘:建立了测定工业甲苯二异氰酸酯中2,4-和2,6-体异构比的液相色谱法。
- The isomer ratio of o-MNT to p-MNT,the degree of dinitration and the ratio of 2,6-DNT to 2,4-DNT have been investigated in the mononitration product of toluene by mixed acid. 通过改变反应条件,研究了硝硫混酸硝化剂对甲苯一段硝化产物的邻对异构体比例、二硝化程度及2,6-二硝基甲苯与2,4-二硝基甲苯生成比例的影响。
- A high performance liquid chromatography (HPLC) method for determing the 2,4-/2 ,6- isomer ratio in commercial. toluene diisocyanate (TDI) was developed. 建立了测定工业甲苯二异氰酸酯中2,4-和2,6-体异构比的液相色谱法。
- Influence of the steric hindrance, solvent effect and porous supporters etc. on o/p isomers ratio in the mononitration product of toluene have been investigated, some experimental results were given. 研究了利用立体位阻、溶剂效应、多孔载体等对有效降低甲苯一段硝化产物邻对位异构体比例的影响,文中给出了部分实验结果。
- Determination of the Isomer Ratio in Commercial Toluene Diisocyanate by Liquid Chromatography 用液相色谱法测定甲苯二异氰酸酯异构体含量
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- Allene is an isomer of methyl acetylene. 丙二烯是甲基乙炔的一种异构体。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- The first or last term of a ratio or a series. 首项,末项比率或数列中第一个或最后一个项
- The state or condition of being an isomer. 同分异构状态以同分异构形式存在的状态或情形
- isomer ratio 异构体比率
- After-tax profit margin is the ratio of net income to net sales. 税後利润率指净收入与净销售之比。
- The ratio of men to women was two to one. 男女的比例是二比一。
- The interval between any two frequencies having a ratio of2 to1. 倍频程频率比率为2比1的两个频率的间隔
- An isomer of retinoic acid, used in the treatment of acne. 一种视黄酸的异构体,用于治疗粉刺
- The strike is the ultima ratio of Trade Unionism. 罢工是工联主义的最后手段。
- The cross ratio he called anharmonic ratio. 他把交比叫作非调和比。
- The ratio between the two sides is one to four. 双方人数对比是一对四。
- Subsistence only increases in an arithmetic ratio. 生活资料只能按算术级数增长。