置换

Objective To summerize the experience of perioperative treatment in patients with serious cardiac valvula disease.

目的总心脏病人的瓣膜置换围术期治疗经验。

Objective To retrospectively review the experience of mitral valve replacement after mitral commissurotomy in 39 cases.

总二尖瓣闭式扩张术后行瓣膜置换术的经验。

Dichlorofluorobenzene is prepared by diazotizating of 2,4-dichloro aniline and substituting of 2,4-dichloro diazo benzene with fluorinion.

在此概述了由2,4-二氯苯胺经过氮化、置换制得2,4-二氯氟苯的生产新工艺,产品纯度达到99。

Methods the nursing courses and the clinical datum about 21 patients with severe rhematic diseases who were taken plasmapheresis. were analyzed.

分析21例症风湿病进行浆置换的临床资料和护理措施。

Plasma exchange with infusion of fresh plasma is the first choice for treatment of TTP, routine use of glucocorticods and gammaglobulin is recommended.

治疗以浆置换，输新鲜浆为主，同时应用皮质类固醇及丙种球蛋白。

Using 2-acetyl benzimidazole and sodium bromide as raw material,2-(dibromine acetyl)-benzimidazole hydrobromate was synthesized with the new bromine that displaced by chlorine gas in light.

以2-乙酰基苯并咪唑和溴化钠为原料,在光照条件下用氯气置换出溴化钠中的溴素,合成兽药噻苯咪唑中间体-2-(二溴乙酰基)-苯并咪唑氢溴酸盐。

CONCLUSION: Base pair substitution mutation and frame shift mutation were caused by folpet in Ames test.And DNA breakage in human PMNC might be induced by folpet.

灭菌丹可引起鼠伤寒沙门氏菌碱基置换和移码突变，并可能损伤人外巴细胞DNA的完整性。

It also has the functions: taring , zero tracking, auto shut-off, units changeable and so on .The Portable Electronic Scale will be an ideal next-generation weighing tool.

具有去皮、零点跟踪、自动关机、单位置换等功能，是理想的新一代称量产品。

Cu-Sn alloy coating with different Sn content can be replacement plating out on iron and steel surface in a solution comprising of copper sulfate, stanous sulfate, complexant and stabilization agent.

铁件在由硫酸铜、硫酸亚锡、络合剂、稳定剂等组成的溶液中,可以置换镀覆不同锡质量分数的铜- 锡合金镀层,其工艺可替代氰化物预镀铜,消除氰化物污染,是实现电镀清洁生产措施之一。