种子作为水稻最重要的经济器官和遗传器官,其形态的变化将直接影响水稻产量和品质。在当前的研究当中,通过反向遗传策略,从基因特异的表达模式入手来研究基因的功能的方法,已经得到了普遍的认可和应用。然而,在已存在的大量水稻种子特异表达基因当中,有关其基因功能的研究却不是很多。基于现状,我们选择了44个水稻种子特异表达的基因,通过反向遗传学的研究策略,对该基因进行表达抑制,并通过对突变体种子性状的多代多株系
汞作为一种主要的全球性污染物而备受关注,燃煤电站是大气中人为汞排放的重要来源。燃煤烟气中汞以单质汞(Hg0)、氧化态汞(Hg+、Hg2+)和颗粒态汞(Hgp)三种形式存在。颗粒
Coumarin and its derivatives are importantly and widely utilized in industries,which are possibly obtained by the condensation reaction by Hans von Pechmann
第一性原理计算已被广泛应用于研究光催化和反应的机理。水分子-金属界面是很多重要光催化水裂解应用的关键 [1～4]。本文采用第一性原理的密度泛函理论(DFT)计算水分子在P
The mechanisms of the palladium-catalyzed hydrothiolation of aliphatic and aromatic alkynes with aliphatic and aromatic thiols have been investigated using
It is found that there exist high catalytic activity of Cu13 cluster for N2O decomposition along the Eley-Rideal reaction pathway via density functional the
Transition state theory is one of the most fundamental theories of chemical reaction dynamics,which plays a very important role in understanding chemical re
提问是一种教学方式,它可以促进思考,而思考是深入学习的一个新起点.很多人提出未来的一个重要趋势是“质疑——好问题比完美答案更重要”,因为答案可以通过现代化的手段搜寻
Michael addition from malonate and enones has been studied for decades.Recently,Lietal[1] reported an amine thiourea catalyzed Michael addition of malonate
The mechanisms of intermolecular hydroacylation of aldehyde are studied using DFT method in both neutral and cationic systems.The catalytic cycle involves t