上海市闵行区居民小区自动售水机的卫生现状

由于目前饮用水地表水水源污染较严重,自来水厂传统水处理工艺又不能彻底去除有机污染物、藻毒素和环境激素,管网污染、陈旧老化、渗漏率高,导致出厂水一用户自来水龙头,水质不合格率增加20％左右。另外,高层水箱、蓄水池清洗消毒不规范,二次供水污染,水质安全得不到保证,     

融合性网状乳头瘤病21例临床分析

报告21例融合性网状乳头瘤病,其中男13例,女8例.发病年龄9～27岁(平均17.7岁),病程1个月～7年.临床上皮损以躯干中部为著,为密集分布的灰褐色丘疹或斑片,相互间融合呈网纹状.真菌检查均为阴性.组织病理学表现为表皮呈城垛样平顶或呈锥状.治疗给予米诺环素50 mg每日2次口服,0.1%维A酸乳膏外涂.4周后皮损开始好转,8周后皮损明显缓解.     

个青皮总糖及总黄酮含量测定

目的对个青皮多糖及总黄酮含量进行测定。方法多糖采用水提醇沉法提取,硫酸-苯酚法显色,分光光度法进行含量测定;总黄酮采用回流提取法进行提取,分光光度法测定含量。结果个青皮多糖含量为4.99%,总黄酮含量为14.57%。结论本法简便、重现性好,可用于个青皮的质量控制。     

HIV-Ⅰ CN54株gagprotease基因嵌合脊髓灰质炎病毒cDNA质粒的构建和表达研究

目的 构建HIV-1 CN54株gagprotease基因嵌合脊髓灰质炎病毒cDNA的表达质粒，并鉴定、检测基因及其表达。方法 用PCR技术获得人免疫缺陷病毒CN54株的gagprotease基因，并使其两端带上合适的酶切住点，将其定向插入到包含脊髓灰质炎病毒cDNA的表达质粒pSVA14中，替代其部分结构基因，构建HIV基因嵌合缺陷性脊髓灰质炎病毒基因组的表达质粒。经筛选、鉴定后用脂质体转染技术将新构建的质粒转入Hela细胞内，用Western Blot方法检测目的基因在Hela细胞内的表达。结果 PCR技术扩增所得的人免疫缺陷病毒CN54株gagprotease基因经琼脂糖凝胶电泳、DNA测序证实成功获得，未引入突变碱基，筛选、鉴定证明gagprotease基因被正确定向插入到脊髓灰质炎病毒的cDNA序列之中，Western Blot检测到gagpro-tcase基因正确表达了相关蛋白。结论 成功构建了表达人免疫缺陷病毒CN54株gagprotease基因的缺陷性脊髓灰质炎病毒基因组嵌合质粒，为利用脊髓灰质炎病毒作人免疫缺陷病毒基因的表达载体奠定了基础，此研究对开发以脊髓灰质炎病毒为艾滋病的疫苗载体有重要意义。     

羟基磷灰石/聚合物复合材料的研究进展

该文对羟基磷灰石与天然生物材料、人工合成的医用可生物降解高分子材料以及医用非降解高分子材料的研究应用与进展进行了总结.并对羟基磷灰石/聚合物复合材料的发展趋势进行了探讨.     

Prognostic and treatment-predictive factors-is there a difference?

The terms risk factor, prognostic factor and predictive factor are often imprecisely used. We defined a prognostic factor as a patient characteristic that identifies subgroups of untreated patients having different outcomes, and a factor predictive of treatment effect as a patient characteristic that identifies subgroups of treated patients having different (as a consequence of treatment) outcomes. To illustrate this, theoretical graphical examples were constructed and data from the literature on prostate cancer were used to substantiate the theoretical examples. In most situations, but not necessarily always, a prognostic factor is also pre- dictive of the effect of specific treatments. Whether a prognostic factor is also predictive of treatment effect or not can only be assessed in a valid comparative setting such as in a randomized trial. A factor that is predictive for treatment effect may not be predictive for another treatment. Prostate Cancer and Prostatic Diseases (2000) 3, 265-268