A heme (HEM) is a multi-atom, non-proteinaceous organic structure capable of positioning an iron (FE) ion in its center.
亚铁血红素 (HEM)是一个多原子、非蛋白质的有机结构，能够将一个铁 (FE)离子置于其中心。
So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.
所以，比如这有一个钠离子，和一个氯离子，它们中心与中心间的距离,我把它设为，这是原子核和原子和的间距。
The metal ion may be the catalytic center of the cofactor, or it may serve to bind the enzyme and substrate together to hold the enzyme in a catalytically active conformation.
金属离子可以是辅助因素的催化中心，也可以帮助形成酶活性所必须的构象。
The negative ion element will become the gas source center and form an ejection in the process of evaporation of coating material, so decrease the damage threshold of the coatings.
并且提出负离子元素在膜料蒸发过程中形成气源中心，产生喷溅，从而使薄膜的损伤阈值降低。
This paper deals mainly with the hardware and software design of the protective circuit for lithium-ion batteries (7 in series), whose control center is PIC16C74.
详细介绍了采用PIC16C74单片机为控制核心的锂离子电池（7串电池组）保护电路的硬件、软件设计。
The ionospheric up flowing ion mainly distributes in the near geo space and its flux has a negative gradient versus geo center distance.
上行离子主要分布在近地空间，其通量密度相对于地心距离呈负梯度。
The results showed that negative air ion concentrations increased gradually and ion polarity ratio decreased gradually from city center to suburb.
结果表明：从福州市中心向郊区空气负离子浓度逐渐增大，单极系数逐渐减小；
In the structure of 1, CuI ion site between the two CuII ions, which blocks the magnetic coupling of the spin center, so the compound show very weak antiferromagnetic behaviors.
在配合物1中，结构中存在一价铜，并且这个一价铜嵌在所有的二价铜之间，这就阻碍了顺磁离子之间的磁耦合，所以这个配合物呈现出非常弱的反铁磁耦合。
Abstract: the fusion hindrance in heavy-ion collisions is studied in the framework of the two-center liquid drop model.
摘要：利用双中心液滴模型，我们研究了重离子反应中的熔合阻止现象。
The U. S. ace shuttle Discovery has landed safely at the Ke edy ace Center in Florida after a 13-day mi ion.
美国发现号航天飞机在完成13天的任务后，已经在佛罗里达州的肯尼迪航天中心安全着陆。
The U. S. ace shuttle Discovery has landed safely at the Ke edy ace Center in Florida after a 13-day mi ion.
美国发现号航天飞机在完成13天的任务后，已经在佛罗里达州的肯尼迪航天中心安全着陆。
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