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But the electrochemical results show that complexes exhibitcompletely irreversible redox behaviour which is different from thatfound in diiron proteins. 1.3 To obtain the diiron species which are stable to elec-trochemical reduction, a series of new tetranuclear cage ironspecies containing two 〓 cores, with using hexadentatepolybenzimidazole ligands, were synthesized and characterized by vari-ous spectroscopic methods. Their physical properties have been investi-gated. The crystal structures of 〓〓tetrakis (benzimidazol-2-ylmethyl)-1, 4-diaminobutane and 〓,〓-tetrakis ( N-ethylbenzimidazol-2-ylmethyl )-1, 4-diaminobutane were determined. They contain two 〓 cores which arelinked to each other by -〓-chain in the ligands.

1.3为了获得电化学还原稳定双核氧桥联Fe化合物，使用六齿配体合成了一系列含有两个〓单元四核笼状化合物，并用各种谱学手段表征了它们，还研究了它们的物理化学性质确定了〓L=N，N，N'，N'-四(苯骈咪唑基-1，4-丁二胺和〓，〓四-1，4-丁二胺化合物的晶体结构，它们含有两个〓单元，其中两个〓单元是通过配体的〓链桥联成四核笼状结构。

METHODS AND RESULTS: 1763 participants (829 M and 934 F; 38 to 88 years of age) of the Framingham Heart Study Offspring cohort underwent CMR of the thoracoabdominal aorta using an ECG-gated 2D T2-weighted black-blood sequence.

方法和结果：参加弗明翰研究的1763人（829名男性和934名女性，年龄38－88岁）通过心电图门控的2维T2加权的黑血扫描序列进行胸腹主动脉CMR扫描。

Rhynchophylline, a neuroprotective agent isolated from the traditional Chinese medicinal herb Uncaria rhynchophylla, was shown to affect voltage-gated K+ channel slow inactivation in mouse neuroblastoma N2A cells.

钩藤碱是从传统中国草药钩藤中，所萃取出来具有神经保护作用的成分。我们以小鼠神经母瘤细胞N2A细胞膜上的电位调控钾离子通道为实验材料，发现钩藤碱能影响Kv通道的慢性钝化过程。

Most understory plants populations display aggre-gated spatial distributions.Daphniphyllum glaucescens,Eurya nitida,Schima superba,Ficus hirtaand Woodwardia japonica and so on have larger niche breadth.

老龄杉木林林下植物主要呈聚集的空间分布；虎皮楠、细齿柃木、木荷、三龙爪、狗脊等林下植物的生态位宽度较大。

With a small class of permanent "haves" barricading themselves within gated communities against the masses of slum-dwelling permanent "have-nots" without.

一小群永久&有产者&固守在封闭式社区中，与外面贫民窟中大批永久&无产者&隔离。

The inner ear expressed a tissue-specific splicing isoform of α1D, and that the cell line constantly expressed this isoform can be used in physiologic and pharmacologic researches of L-type voltage-gated Ca2+ channel expressed in cochleae.

内耳毛细胞表达组织特异性的α1D剪切异构体，该异构体在外源表达系统中的表达为今后研究耳蜗α1D L-型钙通道蛋白的电生理和药理特性奠定了基础。

Loss of these gradients depolarizes cell membranes, leading to the influx of calcium through voltage-gated calcium channels and triggering the release of neurotransmitters such as glutamate from presynaptic nerve terminals.

GLU与突触后神经元膜上的受体相结合，导致钠离子和钙离子内流，引起一系列的生物化学级联反应。

Whereas Guatemala City has shiny shopping malls, gated mansions and trendy restaurants, many indigenous Guatemalans scratch an inadequate living as sharecropping subsistence farmers.

但是，危地马拉城的购物中心、有警卫看守的豪宅及高档餐厅却熠熠生辉；与此同时，许多危地马拉的土著居民只得依靠从事佃农耕种的自然经济来艰难度日。

A ligand-gated association between cytoplasmic domains of UNC5 and DCC family receptors converts netrin-induced growth cone attraction to repulsion.

一个在UNC5 和DCC家族受体细胞质领域间的配体门控联合把netrin诱导的发育锥体细胞吸引力转变为了排斥力〉《细胞》第97卷，(1999)： 927-41页。

The company m-ainly produces the product has tooth one, Foundation bolt, Corru-gated hook, Fastener and so on U hitch.

本公司主要生产的产品有牙条、地脚螺栓、瓦楞钩、U型栓等紧固件。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。