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- alpha particle bombardment 粒子轰击
- Aluminium can be transformed,by the capture of an alpha particle and the emission of a proton,into a stable silicon atom. 铝可以通过俘获取粒子、排出质子而被蜕变成一种稳定的硅原子。
- Aluminium can be transformed, by the capture of an alpha particle and the emission of a proton, into a stable silicon atom. 铝可以通过俘获。 粒子、排出质子而被蜕变成一种稳定的硅原子。
- A grobacterium-mediated transformation system is widely used,and PEG-mediated transformationsystem or particle bombardment system is also involved for obtaining transgenic citrus. 柑橘转基因的手段主要是农杆菌介导法,PEG介导法和基因枪法也有应用;
- The paper summarized the application of agrobacterium tumefaciens mediated,particle bombardment,ovary injection and pollen tube pathway method in maize transformation. 本文就近几年来根农癌杆菌介导法、基因枪法、子房注射法、花粉管通道在玉米基因转化中的应用情况加以综述.
- The nature of the nuclear transformation could be firmly established: the aluminium atom,for example,captures the alpha particle and is transformed,after expelling the proton,into an atom of silicon. 核蜕变的性质因此得到确立。例如,铝原子俘获。粒子,并在排出质子后蜕变成硅原子。
- Several transformation methods,including Agrobacterium-mediated transformation(AGR),particle bombardment(BOM),and combination of the two methods(BTA,BPA and BOA),have been tested and compared with each other. 比较了农杆菌法(AGR),基因枪法(BOM)及农杆菌与基因枪结合(BTA,BPA和BOA)等方法对茶树遗传转化效率的影响。
- The nature of the nuclear transformation could be firmly established: the aluminium atom, for example, captures the alpha particle and is transformed, after expelling the proton, into an atom of silicon. 核蜕变的性质因此得到确立。 例如,铝原子俘获。 粒子,并在排出质子后蜕变成硅原子。
- When we breathe in radon, the alpha particles emitted in the decay process will cause damage to our lung tissue. 氡气在衰变过程中会放出粒子,当我们吸入氡气时,我们的肺部便会受粒子影响。
- transformation by particle bombardment 基因枪转化
- Alpha particles are positively charged helium nuclei obtained from natural radioactive decay. 粒子是从天然放射性蜕变得到的带正电的氦核。
- alpha particle ionization detector α粒子电离检测器
- The enemy kept up their bombardment day and night. 敌军一直日夜不停地狂轰滥炸。
- Millions of alpha particles went straight through the nitrogen gas without touching any of its atoms. But now and then there came a direct hit on a nitrogen nucleus, which split it. 成百上千万的粒子没有碰到氮原子就穿过了充满氮气的试管,但时不时的总有一些粒子会击中并分裂氮原子。
- He sat out the bombardment in the trench. 他在壕沟内一直坐到炮轰停止。
- Over 25 isotopes of Polonium are known, with atomic masses ranging from 192 to 218. Polonium-210, the predominant isotope of polonium, is radioactive and emits alpha particles on decay. 现时已知道钋元素有25个同位素,它们的质量数由192至218,钋210是当中显著的一个同位素,具放射性特徵,会释出放射性阿尔法粒子。
- Growth Law of Rice Resistant Calli Transformed by Particle Bombardment 水稻基因枪转化过程中抗性愈伤的生长规律
- The enemy forces crumpled under the bombardment. 敌军在炮击下垮了。
- The bombardment continued without cessation. 轰炸持续不断地进行着。
- The researches are concerned with alpha rays. 这些研究是关于阿尔法射线的。