The pharmacokinetics of pancuronium bromide in infants, children and adults

Laparoscopic retroperitoneal lymph node dissection is a new surgical procedure used to enhance staging in men with clinical stage I nonseminomatous germ cell tumors of the testis. The procedure has been performed in a limited number of patients at several centers with extensive laparoscopic experience. Laparoscopic retroperitoneal lymphadenectomy is a technically demanding procedure which can be successfully completed in the majority of patients. However, the risk of complications is greater than in patients who undergo standard open retroperitoneal lymph node dissection. The primary advantage of a laparoscopic approach is shortened hospitalization and rapid return to normal activity. The role of laparoscopy in the management of patients with testis malignancy has not been defined. The use of this staging procedure may help minimize the need for surveillance studies following surgery and may be best utilized in men with a lower likelihood of nodal metastases. Ultimately, prospective study in large groups of patients will be necessary to determine the role of laparoscopic retroperitoneal lymph node dissection in patients with testis cancer.     

真空铸造高强度C/Mg复合材料

本文介绍用真空铸造法制造抗拉强度超过1000MPa的高强度C/Mg复合材料。将T300纤维经C-Si-O梯度涂层处理后单向排布于型腔内,在真空下注入ZM-5合金液,凝固后即得C/Mg复合材料零件或试样。试样的抗拉强度在纤维体积分数为0.35时达1050MPa。本文讨论C-Si-O梯度涂层对获得高强度复合材料的作用。     

地面油管漏失定量测试方法探讨

对油管漏失进行定量测试的方法确定具体漏失位置。方法运用双频道回声探仪探测动液面的原理和工作方法，根据油管漏失形成的死油坏在测试曲线上出现特殊波位置判断油管漏失位置。结果：经过７０多井次的现场试验，该方法具有较高的准确性和可靠性。结论：利用特殊波可以有效监测油管漏失，并具有推广使用价值。     

冶金过程中复杂夹杂物和钢液化学平衡计算

本文提出一个同温冶炼过程中预测非金属夹杂物沉淀的计算机程序。本研究中，多元硅酸盐溶体的Ｇｉｂｂｓ自由能由基于统计热力学的晶胞模型来计算，该晶胞模型按照氧与周围的阳离子构成的对称和非对称晶胞来描述硅酸盐熔体结构，假定高温冶炼时认与非金属夹杂物平衡，钢液中氧化物元素的活度由Ｗａｇｎｅｒ交互作用系数来计算，利用本程序可以估计炼钢时沉淀的非金属氧化物的成分，为调整冶炼工艺和提高产品质量提供指导，进一步可计     

以网格曲线为连续条件的光滑曲面

本文提出一种以网格边界曲线定义曲面的方法。曲面的计算式唯一地由网格的四条边界线的参数而定，各网格间连接的光滑度完全由网格间的边界线的光滑度来决定。当网格间的边界线具有Ｃ~１连续以上的光滑度时，网络曲面间将自动保证是Ｃ~１连续的，否则将是Ｃ~０连续。利用这个方法，可以方便地从线框模型（ｗｉｒｅ－ｆｒａｍｅｍｏｄｅｌ）建立面模型（ｓｕｒｆａｃｅｍｏｄｅｌ）。     

实体造型中的几何约束

实体造型是一个基于约束的过程，完成从功能约束到几何约束、再到代数约束的转化而得到实体模型。本文讨论了几何约束的层次性及其表示，并且对几何约束同设计意图的关系进行了研究，提出了基于ＣＳＧ／ＧＣＧ／Ｂ－ｒｅｐ的模型表示。     

强度反射型光纤温度传感器

本文提出并研究了一种新型的强度反射型光纤温度传感器.根据定容气体温度与压力的线性关系,通过简单的测温元调制光纤中的反射光强,从而得知待测温度.这种传感器结构紧凑,造价低廉.在30~50℃范围内,灵敏度可以达到30mV/℃以上.     

Suppressive effect of corticosteroids on the gene expression of interleukin-5 and eosinophil activation in asthmatics

Although cortico steroids are effective anti-inflammatory agents in ameliorating asthma symptoms and bronchial hperreactivity, their mechanism of action is unknown. Interleukin (IL)-5 is known to play a key role in regulating eosinophil proliferation and activation. Therefore, we examined the changes of IL-5 mRNA expressions in PBMC semi-quantitatively with RT-PCR as well as serum ECP levels and MCH-PC20 values in asthmatics before and after being treated with corticosteroids. The results revealed that there were significant decrease in the level of IL-5 mRNA and serum ECP concentration after therapy (P < 0.05) and there was remarkable improvement in the values of MCH-PC20 and FEV1% (P < 0.05). It was also found that the changes of serum ECP levels or MCH-PC20 values were accompanied by a reduction in IL-5 mRNA expression (r = 0.5426 or 0.4857, P < 0.05). These results suggested that the therapeutic effects of corticosteroids in asthma may result from modulation of IL-5 gene expression with consequent inhibition of eosinophil activation.     

威海市污水处理深海排放工程的设计

威海市污水处理深海排放工程是为改善其水域环境而建设的一英包括市区排水系统，污水预处理厂，输水管道和海洋放流管系统在内的完整而典型的工程，因此其工程设计扣的经验将会对同类项目的设计与工程建设有所借鉴。     

印刷质量控制的基本方法(一)综述

无论哪一种印刷品的生产都要经过若干个工艺过程，才能将原稿上的图文信息转移到承印物上。由于印刷技术的飞跃发展，标准化和质量控制成为一个很重要的问题。标准化和质量控制在很大程度上是依靠仪器和控制装置来实现的。科学技术的极大发展，大大地推动了印刷技术的发展，印刷所使用的原材料和工艺得到了很大的改进，逐步实现了标准化，提高并稳定了生产高质量产品的能力。目前我们评价印刷品质量的优劣大致有三种方法：主观评价法、客观评价法和综合评价法。主观评价法，是以原稿为基础对照样张来评价。这里有人为的因素，根据评价人的知…