可逆性

Objective To evaluate the relations between regional myocardial blood flow and function at rest and to investigate the mechanisms of the reversible regional myocardial dysfunction in the setting of chronic coronary stenoses.

目的 评价慢性冠脉狭窄时心肌收缩功能与心肌血流的关系，以探讨慢性可逆性左室收缩功能低下的发生机制。

RESULTS:The transendothelial electrical resistance of microvessels superfused with artificial cerebrospinal fluid was about 2 500 Ω*cm2, indicating a tight barrier with extremely low ion permeability, and application of 10-4 mol*L-1 histamine in superfusate caused a rapid and reversible decrease of resistance.

结果：脑软膜微血管经灌流人工脑脊液，测得的跨内皮电阻大约为2 500 Ω*cm2，说明微血管内皮是具有较低通透性的致密屏障，在人工脑脊液中加入10-4 mol*L-1组胺引起跨内皮电阻快速的和可逆性的下降。

Result: The transendothelial electrical resistance of microvessels superfused with artificial cerebrospinal fluid was about 2500 Ω·cm2, indicating a tight barrier with extremely low ion permeability, and application of 10-4 mol·L-1 histamine in superfusate caused a rapid and reversible decrease in transendothelial electrical resistance.

结果 ：脑软膜微血管经灌流人工脑脊液，测得的跨内皮电阻大约为 2500Ω·cm2 ，说明微血管内皮是具有较低通透性的致密屏障，在人工脑脊液中加入 10-4 mol·L-1组胺引起跨内皮电阻快速的和可逆性的下降。

It can form reversible gel synergism with xanthan or carrageenan and also can form irreversible elastic and tough gel in alkaline solution.

魔芋粉溶于水后能形成非常粘稠的溶胶，与黄原胶或卡拉胶互作能形成可逆性凝胶，与稀碱液作用也能形成坚实的不可逆凝胶。

The results showed that the stable potential of the electrode was about 100 mV

实验测试了该参比电极的稳定性、重现性、可逆性、响应时间、温度影响等因素。

Cyclic voltammetric experiments show there has great difference in the reversibility of the oxidative reactions of dopamine and ascorbate.

循环伏安试验中，多巴胺和抗坏血酸的氧化反应的可逆性有很大的不同。

Experimental data indicate that the amount of the heavy metal ions desorbed from the biomass could not be calculated with the adsorption models.

但是实验结果也表明，生物吸附模型不适用于计算在生物质中的重金属离子脱附量，即重金属生物吸附模型没有满足可逆性。

Pramipexole-induced antecollis may be serious, but is a reversible dystonia in patients with PD.

普拉克索引起的颈项前屈可能很严重，但实为帕金森病患者的一种可逆性肌张力障碍。

DNA methylation is a kind of ordinary pheonemena in eukaryote.

DNA甲基化是高等真核生物中经常发生的现象，这种表观遗传学改变常发生在基因的启动子区域，并且不改变DNA序列和遗传密码，具有可逆性，在基因转录调控中发挥重要作用。

WD40 domain, found in a number of eukaryotic proteins that cover a wide variety of functions including adaptor/regulatory modules in signal transduction, pre-mRNA processing and cytoskeleton assembly; typically contains a GH dipeptide 11-24 residues from its N-terminus and the WD dipeptide at its C-terminus and is 40 residues long, hence the name WD40; between GH and WD lies a conserved core; serves as a stable propeller-like platform to which proteins can bind either stably or reversibly; forms a propeller-like structure with several blades where each blade is composed of a four-stranded anti-parallel b-sheet; instances with few detectable copies are hypothesized to form larger structures by dimerization; each WD40 sequence repeat forms the first three strands of one blade and the last strand in the next blade; the last C-terminal WD40 repeat completes the blade structure of the first WD40 repeat to create the closed ring propeller-structure; residues on the top and bottom surface of the propeller are proposed to coordinate interactions with other proteins and/or small ligands; 7 copies of the repeat are present in this alignment.

WD40域，在真核蛋白质的数量发现，涵盖了包括各种功能适配器/信号转导，mRNA前体细胞骨架组装加工和管理模式；通常包含一个从11月24日生长激素肽的N残留端和西部数据肽在其C端和40残留长，因此得名WD40；之间的生长激素和WD是一个保守的核心，作为一个稳定的螺旋桨式平台，可以绑定的蛋白可以稳定或可逆性；形式与每个刀片是一个四叶片组成的几个类似结构的螺旋桨，搁浅反平行β-负债表；很少检测副本实例假设，形成了聚大结构，每个WD40重复序列形成了前三个链的一个刀片，并在未来的刀片上链，最后C -末端WD40重复完成了第一WD40重复叶片结构，创造螺旋桨的封闭环结构，对螺旋桨顶部和底部表面残留物，则建议协调与其他蛋白质和/或小配体； 7重复副本存在于相互作用这条路。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。