Effects of Organic Vehicle on the Rheological and Screen-Printing Characteristics of Silver Paste for LTCC Thick Film Electrodes

Silver paste is widely used for low-temperature co-fired ceramic (LTCC) electrodes. In this work, a kind of LTCC silver paste for fine-line screen-printing was developed by considering the effect of the organic vehicle on rheological behavior and screen-printing properties. A step-by-step volatilization mode was applied to screen the mixed organic solvent of α-terpineol, 2-(2-butoxyethoxy) ethyl acetate (BCA) and dibutyl phthalate (DBP). The α-terpineol:BCA:DBP ratio of 5:2:3 is selected by considering the volatility, viscosity, and pseudoplasticity of the organic vehicle. Both viscosity and pseudoplasticity of shear-thinning increase with the increase of ethyl cellulose (EC) organic binder content. Three interval thixotropy test (3ITT) was conducted to discuss the thixotropy of silver paste. The minimum printing line width of 13.27 µm is obtained using silver paste with 10 wt% EC, confirming that the homemade paste has good printability.     

不同诱导剂在根尖诱导成形术中的疗效观察

目的探讨不同诱导剂在根尖诱导成形术中的临床效果。方法选自2010年3月～2011年lO月在我院牙科门诊接受治疗的100例患者，共有根尖孔发育不全的患牙168颗，将本组对象随机分为实验组和对照组，实验组使用Vitapex糊剂，对照组使用氢氧化钙，作为根管充填糊剂分别行根尖诱导成形术，手术完成后定期进行复查，并对两组的治疗效果进行对比。结果实验组80颗患牙成功64例，改善12例，失败6例，总有效率为95．00％；对照组88颗患牙成功34例，改善28例，失败26例，总有效率为70．45％，两组的治疗有效率方面比较差异有统计学意义（P〈0．05）。结论在行根尖诱导成形术方面，Vitapex糊剂可以获得比氢氧化钙更加理想的治疗效果，值得在临床中广泛使用并推广。     

Toxic acute hepatitis and hepatic fibrosis after consumption of chaparral tablets

In this report we describe a young, previously healthy woman who developed severe acute hepatitis after consumption of chaparral tablets, a commonly used herbal product. In this case, the elimination-rechallenge event and the exclusion of other possible aetiologic factors strongly supported true causality between the herbal product and the liver damage. Primary liver biopsy showed severe toxic hepatitis consistent with previous reports of chaparral-induced liver damage. Later, 6 months after the liver function tests had normalized, permanent hepatic fibrosis could still be seen.     

The chronic hepatotoxicity assessment of the herbal formula Zishen Yutai pill

Zishen Yutai pill (ZYP) is an oriental herbal formula, while hepatotoxicity assessment of ZYP was rarely evaluated. Therefore, our aim is to re-evaluate its hepatotoxicity in both normal and carbon tetrachloride (CCl₄) induced chronic liver injury rats. In the normal model, two doses of ZYP (1.575 and 9.450 g kg⁻¹ d⁻¹; i.e. 1 × , 6 × clinical doses) were given orally to rats for 24 weeks. In the chronic liver injury model, 10% CCl₄ was administered to rats abdominally twice a week at a dose of 5 mL kg⁻¹ for 12 consecutive weeks. Administration time started from 4 weeks after the beginning of CCl₄ treatment. Toxicological parameters included mortality, body weight, food consumption, clinical signs, biochemical parameters, gross observation, organ weight, necropsy findings and histopathology were monitored. In the normal model, we found no any mortality or abnormality in clinical signs, relative liver weight, biochemical parameters and histopathology in ZYP treatment groups. In the chronic liver injury model, liver damage related parameter such as ALT was elevated at the high dose of ZYP treatment in contrast to the CCl₄-treated group (P < 0.01). In histopathological assessment, there were no significant difference between ZYP treatment groups and CCl₄-treated group. No observed adverse effect on livers were established for 9.450 g kg⁻¹ d⁻¹ ZYP in the normal rats and 9.450 g kg⁻¹ d⁻¹ ZYP in the injury rats.     

中药灌肠并针灸佐治小儿病毒性肠炎60例疗效观察

目的：观察中药灌肠并针灸对小儿病毒性肠炎的疗效。方法：临床上将110例病儿随机分为治疗组和对照组,对照组不用抗生素,纠正水电解质及酸碱平衡紊乱,并常规口服思密达12包-1包;治疗组：在对照组相同治疗的基础上加用中药30m l-50m l灌肠2次/d,针灸1次/d,观察患儿治疗后症状缓解情况。结果：治疗后,治疗组总有效率96.7%,对照组总有效率68.0%,疗效明显优于对照组,且减少了不良反应。结论：中药灌肠并针灸治疗小儿病毒性肠炎操作简单,使用方便,不良反应少的优点,可明显提高治愈率。     

中药保留灌肠联合吡喹酮治疗血吸虫性结肠病

采用中药保留灌肠联合吡喹酮治疗血吸虫性结肠病并观察其临床疗效，结果显示，经过1～2个疗程治疗后总有效率可达95％。     

欧盟植物药的技术性贸易壁垒对中药出口的影响

目的:研究欧盟植物药在2004/24/EC指令指导下的技术性贸易壁垒,为我国中药成功出口欧盟提供一些思路。方法:从简化注册申请条件的限制、技术标准与认证制度、欧盟注册申报资料等角度探讨中药申请欧盟注册所面临的技术性贸易壁垒,并提出一些相应的对策。结果与结论:首先,加强政府间的沟通合作;其次,建立与国际接轨的中药标准;再次,加强跨国经营,寻找合作伙伴;最后,健全信息咨询机构,充分掌握技术性壁垒信息。     

中药脱敏剂治疗牙本质过敏的临床疗效观察

目的:观察中药脱敏剂治疗牙本质过敏的临床疗效。方法:选取牙本质过敏患者126例,随机分为研究组64例(患牙172颗)、对照组62例(患牙158颗),分别使用中药脱敏剂和氟化钠甘油进行治疗。观察2组患者在治疗后即刻、3个月后、6个月后的疗效,并进行统计学分析。结果:2组疗效比较有显著性差异(P<0.01)。结论:中药脱敏剂可有效治疗牙本质过敏,且使用方便,疗效相对持久。