1) K-20
K20
1.
Technical study about high-yield culture technique on the new variety which is K-20;
水稻新品系K20高产优化栽培技术研究
2) Late Cretaceous to Early Palaeogene
K2-E
4) K2 group
K2群
1.
In this paper,we construct a family of algebraic curves over Q with many elements in the K2 group.
对一类有理数域上的代数曲线,构造出了它们的K2群中的一些元素,并证明了这些元素之间一些有趣的线性关系;同时,还讨论了这些元素的整性质。
5) turn k2 side bearer
转k2侧架
1.
The reasons of hot crack on the corner of the turn k2 side bearer are analyzed, and the technical measures are set down on smelt, molding, pouring etc, which increased greatly the pass rate of castings in practice.
分析了转k2侧架转角处热裂纹的产生原因,并在产品熔炼、造型、浇注等方面制定了工艺解决措施,这些措施在生产中实施后使产品的合格率大幅度提高。
6) menaquinone
[,menəkwi'nəun]
维生素K2
1.
2-Bromo-3-methyl-1,4-dimethoxynaphthalene(1),an important intermediate of menaquinone,was obtained via a three-step process employing(2)-methyl-1,4-naphtho-quinone(2) as starting material.
以2-甲基萘醌(2)为原料,经过催化氢化、甲醚化和溴代三步反应,合成了维生素K2的重要中间体2-溴-3-甲基-1,4-二甲氧基萘(1)。
补充资料:(17α)–13-Ethyl-17-hydroxy-18,19-dinorpregna-4,9,11-trien-20-yn-3-one
分子式:C21H24O2
分子量:308.4194
CAS号:16320-04-0
性质:暂无
制备方法:暂无
用途:暂无
分子量:308.4194
CAS号:16320-04-0
性质:暂无
制备方法:暂无
用途:暂无
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条