铁和硫酸的反应是一种置换反应。
The reaction of iron with sulfuric acid is a case of replacement.
停机化学置换反应造成。
实验表明，提高温度有利于置换反应的进行。
The experimental data showed that high temperature was beneficial to improve replacement reaction rate.
如有必要可用干燥氮气置换反应器，并保压。
If necessarily, nitrogen dryer exchange reactor could be used with keeping presure.
镁较锌活泼，所以锌不可以与氯化镁进行置换反应。
Zinc is less reactive than magnesium, therefore, zinc cannot displace magnesium for magnesium chloride solution.
本论文主要研究了高碳烷基铝的热置换反应和冷凝技术。
The present dissertation deals with the displacement reaction of ethylene and high alkyl-aluminum compounds.
置换反应是中学化学中的主要反应，也是典型的氧化还原反应。
Metathesis reaction is not only one of the major reactions in secondary school chemistry teaching, but a typical REDOX reaction.
通过实验证明，本发明的方法能有效地防止这种置换反应的发生。
Proved through the experiment that, this invention method can effectively prevent this kind of permutation reaction the occurrence.
笔者采用置换反应法在粉煤灰空心磁粉表面进行了化学镀铜的研究。
The replacement deposition method is applied to electroless copper-plating on the magnetic fly-ash powder.
利用置换反应所获得的产品潜质和预期经济效应是明显的和令人兴奋的。
The potential to take product performance and achieve desired economics by introducing metathesized wax is significant and exciting.
本文采用置换反应方法除去废铜线表面的锡镀层，对回收锡的工艺进行了探索。
In this paper, the separation of tin cladding from tinned copper wires and its recovery are investigated.
讨论了热力学、物质平衡和动力学原则在固态置换反应原位合成复合材料中的应用。
The applications of the principles of thermodynamics, mass balance and kinetics to the synthesis of in situ composites through solid-state displacement reactions has been discussed.
本发明涉集成电路封装领域，具体地说，涉及对管脚电镀时，防止置换反应的方法。
The invention involves the integrated circuit package domain, to be specific, involves when galvanizes to the base pin, prevents the permutation reaction the method.
通过建立界面扰动模型，推导了三元固态置换反应系界面稳定性的化学势梯度判据。
A new interface-perturbation model of ternary system is suggested and the interface-stability criterion is derived in the form of chemical potential.
当加入脱硫副产物后，置换反应的速度受到抑制，土壤中的代换性钠也不能立即排出土体。
When accessing to the by-product, the speed of replacement reaction is choked back and soil exchangeable sodium can not immediately discharged soil.
这是一个五步反应，包括重氮化偶合反应、氯置换反应、缩合反应、水解反应、缩合反应。
This was a five -step process involving: diazo coupling reaction, chloridization, condensation, hydrolysis, condensation respectively.
例如有机锡的稳定剂可以和羧甲基纤维素分子的不稳定氯原子配位结合，有机锡和不稳定的氯原子发生置换反应。
For example, the stabilizer of organotin compounds can be combined with the unstable chlorine atom of the carboxymethyl cellulose molecule, and the organotin and unstable chlorine atoms are replaced.
综述了芳香族置换氟化的反应机理与最新研究状况，并展望了其未来发展前景。
The reaction mechanism and the latest research status of displacement fluorination of aromatics are summarized, and the development trends are forecasted also.
此外，建立了一种原创的基于置换色谱的非均相聚合方法——阳离子交换色谱柱上聚合反应。
In addition, an original heterogeneous polymerization method, based on displacement chromatography, has been tested. We named it "polymerization reaction in cation exchange chromatography".
结论围术期心理护理可有效调节髋关节置换手术患者的应激反应水平。
Conclusion Perioperative psychological nursing care could release the mental stress of the patients of hip-joint replacement surgery.
换血是把全部或大部分的血液除去而置换他人的血液。输血的不良反应常见。
In exchange transfusion, all or most of the Blood is removed and replaced with another's Blood. Undesirable reactions to transfusion are not uncommon.
说明去镁叶绿素置换影响了细菌反应中心内激发光能传递和原初光化学反应过程。
The decaying kinetics changed in different RCs, indicating that pheophytin replacement influenced the energy transduction and primary photochemical reaction in purple bacterial reaction centers.
为了去除氟化物、避免和纠正血钾过多和对置换治疗没有反应的周期性血钙过少，有必要进行血液透析。
Hemodialysis may be necessary for fluoride removal and to avoid or correct hyperkalemia and recurrent hypocalcemia not responsive to replacement therapy.
首先用溶剂置换实验验证了纳米反应器的存在且是反应和粒子生长的场所；
Solvent replacement experiment provided direct evidence that there was water-rich adsorption layer and the reaction took place in the layer.
考察了原料摩尔比、加料顺序、反应温度、反应时间、置换剂等对反应结果的影响。
The reaction conditions, such as the ratio and adding order of rectants, reaction temperature, reaction time and displacers, were investigated.
目的通过实施围术期心理护理，来研究心理护理对髋关节置换手术患者手术前后心理应激反应的影响。
Objective To investigate the effects of psychological nursing care on the mental status of patients before and after hip-joint replacement surgery.
目的观察全髋置换术后股骨皮质的肥厚反应及其临床意义。
Objective to observe the femoral cortical hypertrophy and its clinical importance after total hip arthroplasty.
用电化学方法和扫描电子显微镜研究了钢铁置换镀铜反应及镀层形貌，结果表明：钢铁表面的置换铜镀层总是多孔的。
The reaction of chemical replacement copper plating on iron surface and profile of the coating have been investigated by electrochemical methods and scan electron microscopy.
用电化学方法和扫描电子显微镜研究了钢铁置换镀铜反应及镀层形貌，结果表明：钢铁表面的置换铜镀层总是多孔的。
The reaction of chemical replacement copper plating on iron surface and profile of the coating have been investigated by electrochemical methods and scan electron microscopy.
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