the chemical element of atomic number 57, a silvery-white rare earth metal. (Symbol:
(化学元素)镧(符号:<Bold>La</Bold>)。
"mid 19th cent.: from Greek
n. 镧
No significant changes were found in lanthanum citrate groups.
柠檬酸镧给药组无明显作用。
A formula of toothpaste containing lanthanum salt was obtained.
给出了一种含镧牙膏的配方。
The analysis of tilt boundary observed in lanthanum chromates was made.
对观察到的铬酸镧倾斜晶界进行了分析。
The catalytic converter on your exhaust system contains cerium and lanthanum.
排气系统上的接触反应器含有铈和镧。
High concentration of Lanthanum nitrate inhibited the plantlets growth.
过高的浓度对试管苗生长有一定抑制。
镧:原子序数57,原子量138.9055,元素名来源于希腊文,原意是“隐蔽”。镧是1839年瑞典化学家莫桑德尔从粗硝酸铈中发现镧,并确认是一种新元素。镧在地壳中的含量为0.00183%,是稀土元素中含量最丰富的一个。镧有两种天然同位素:镧139和放射性镧138。该元素遇热、明火、氧化剂等物质接触有引起燃烧危险,一般封存于固体石蜡或浸于煤油中。
the chemical element of atomic number 57, a silvery-white rare earth metal. (Symbol:
(化学元素)镧(符号:<Bold>La</Bold>)。
"mid 19th cent.: from Greek