The synthesis of ν - curcumene was described. The experiment affirmed that ν - curcumene can aromatize to α - curcumene readily at room temperature.用金属锂 - 液氨一步还原法合成γ姜黄烯.实验证实γ姜黄烯极不稳定,室温下极易芳香化转变成α姜黄烯....
The inhibition of parathion, phoxim , methomyl, arprocarb, imidacloprid andavermectins to tyrosinase is not obvious.对硫磷 、 辛硫磷、灭多威 、 残杀威 、 吡虫啉及阿维菌素对家蝇酪氨酸酶有不明显抑制作用....
Derived from two separately fertilized eggs . Used especially of fraternal twins.二卵双胞胎是源于两个分开的受精卵的.Sarah was looking after the twins...萨拉当时正在照管那对双胞胎。Thy two breasts are like two young roes that are twins.3你的两乳好像一对小鹿,就是母鹿...
The picture shows the construction site of the Lesotho Parliament Building.图为中国援莱议会大厦工程施工现场一角.Question: How is the investment environment of the Kingdom of Lesotho?记者: 莱索托的投资环境是怎样的?He hauls loads throughout South Africa,...
In 1957, the Soviets launched Sputnik 1 into outer space.1957年,苏联人将“斯普特尼克1号”人造卫星送入了外层空间。They have been visited by creatures from outer space.有外星人拜访了他们。radio waves from outer space来自外层空间的无线电波...