无目的

Comparing with the traditional way of stronger sulfuric acid ,The catalyst has its advantage of more effective on the synthesis,the operation is more safer, does not corrode the equipments and does not pollute the environment,and the recovering operation is simple. So it can be called a green method on synthesis of isobutyl acetate.

该催化剂与传统浓硫酸法相比，催化效果更好，作更安全，对设备无腐蚀，对环境无污染，实现了催化剂的重复利用，并且回收作简单，重复利用率高产率好，达到绿色合成乙酸异丁酯的目的。

Objective To research on the lysogenic bacteriophage CTXΦ genome, for isogenous sequences with RS in the chromosomes were found in some strains of ctxAB- E1 Tor biotype isolates in this lab.

目的 近年研究发现产毒霍乱弧菌的毒素基因ctxAB由其溶原性噬菌体CTXΦ编码，这种丝状噬菌体可携带ctxAB传递给无毒素基因的霍乱菌株。

Objective: To develop an injectable, bioresorbable bone substitute that can immediately harden isothermally in situ for meeting developments in minimally invasive techniques for orthopedic surgery.

目的为研制一种适应整形外科微创技术发展的一种可注射、可吸收、无产热、原位立即变硬的骨替代材料。

Objective:To develope an injectable, bioresorbable bone substitute that can immediately harden isothermally in situ for meeting developments in minimally invasive techniques for orthopedic surgery.

目的 为研制一种适应整形外科微创技术发展的一种可注射、可吸收、无产热、原位立即变硬的骨替代材料。

Objective Ketogenic diet is a high fat, low protein, low carbohydrate diet.

目的 生酮饮食是一种高脂肪、低蛋白、低糖饮食，它对癫癎特别是难治性癫癎的临床疗效早已明确，但其抗癎作用机制尚不清楚，长期应用生酮饮食对发育期脑认知功能的影响目前也无定论。

Objective To determine the normal and variation of the acetabular labra in asymptomatic hips by means of a radial-sequence MR imaging technique with FLASH-2D sequence, and to study the relationship between the shape and signal of the labrum with patient's age in corresponding the segment of the labrum.

目的 采用放射状扫描方法及FLASH-2D序列显示各部位髋臼唇的形态信号，观察不同年龄组及不同解剖部位无症状髋臼唇的MRI特征，研究其形态及信号与年龄及解剖部位的相关性。

objective to explore the best method of nursing in laparoscopic operation of subtotal hysterectomy with pk scapel.methods ninety seven patients under going operation of laparoscopic subtotal hysterectomy with pk scapel were slected.the bleeding volume,operation time and methods of nursing including machine check,proceeding and maintenance of instruments.results bleeding volume was lessened significantly and good nursing during operation can improve safety and success rate of losh.conclusion good nursing with well knowledge of pk scapel,accurate proceeding and sterilization and skilled cooperation plays a key role in assurance of the success of losh.

摘 要］目的：探讨在腹腔镜下使用pk刀行子宫次全切除术配合的方法。方法：对97例使用pk刀在腹腔镜下行子宫次全切除术配合进行总结，主要是检查测试仪器功能，按操作程序密切配合手术，术后正确彻底的清洗、保养、消毒与灭菌。结果：在腹腔镜下应用pk刀切除子宫，出血量明显减少，组织损伤小，97例的手术中除1例粘连严重中转开腹外，其余手术均顺利完成，无并发症发生。结论：护士加强对pk刀的应用学习，正确掌握操作规程和灭菌方法，以及娴熟的腹腔镜配合技术是手术顺利进行的有力保证。［关键词］腹腔镜；pk刀；子宫次全切除术；护理配合

Objective To study the clinical effect of cryopreserved allogeneic lunate bone transplantation on aseptic osteonecrosis.

目的 研究深低温冷冻同种异体月骨移植治疗月骨无菌性坏死的临床疗效。

OBJECTIVE: To study the feasibility of autologous periosteum wrapping tendon combined with basic fibroblast growth factor as substitute for the lunate bone in treatment of aseptic necrosis.

目的：通过动物实验研究探讨以自体骨膜包裹肌腱复合碱性成纤维细胞生长因子(basic fibroblast growth factor，bFGF)植入物替代月骨观察其治疗月骨无菌性坏死的可行性。

Except one lungless species -''Typhlonectes eiselti'', only known from one specimen collected somewhere in South America - all Caecilians have

除了在南非发现的''Typhlonectes eiselti''没有肺之外，所有无足目的生物都有肺，但是他们同时也使用皮肤与口进行氧气的吸收。

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％。