奥硝唑口腔贴片的质量研究

目的：研究与建立奥硝唑口腔贴片的质量标准。方法观察贴片的性状及理化性质;以自制的装置测定贴片的粘附力;采用紫外分光光度法测定奥硝唑口腔贴片的释放度;采用高效液相法测定其有关物质及含量。结果奥硝唑口腔贴片的性状及性质稳定,粘附力测定方法方便可重复,释放度测定方法准确度高,且成品在1、2和4h的释放量应分别为标示量的35％～65％、60％～90％及85％以上。高效液相色谱法的分离度、精密度、线性及回收率良好。结论拟定的质量标准可行,可有效的控制奥硝唑口腔贴片质量。     

Dermatotoxicologic clinical solutions: clinical management of fragrance mix #1 #2 patients?

Today’s fragrances are present in more than just perfumes, having become ubiquitous in skin care products such as creams, shampoos, sun tan lotion and deodorants. While aromatics can arouse the senses, aromatic compounds applied to skin can also cause allergic contact dermatitis. This article describes diagnosis, limitations of patch testing for fragrance mix 1 and fragrance mix 2, the relevance of fragrance concentration in products, use testing of common consumer products and our current recommendations in regards to the management of fragrance contact allergy.     

Peyer's Patches Epithelium in the Rat

The epithelial layer covering lymphoid follicles of Peyer's patches consists of cells with a different surface morphology. Some of these cells have been described as a distinct cytotype, the so-called M cells. In order to resolve the controversy on the specific morphological and biochemical markers of M cells, structural, ultrastructural, and morphometrical study of the epithelium covering the rat Peyer's patches were performed. Peyer's patches from healthy rats were processed for light microscopy, immunohistochemistry, in situ nick-end labeling (TUNEL), and scanning and transmission electron microscopy. A morphometric study was also performed to evaluate microvillus density, length, and number of lysosomes in different areas of the epithelium. Peyer's patches were covered by simple columnar/cubical dome epithelium (DE). Scarce goblet cells and a large number of enterocytes were observed. Ultrastructural observations revealed that the DE showed cells with different morphology. The density and length of microvilli and the lysosome number varied along the whole dome without significant differences. The DE cells characterized by short and disorganized microvilli appeared always in close spatial relationship with lymphocytes. In conclusion, the concept that distinct cell types (enterocytes and M cells) can be identified in the rat DE does not appear to be valid based on morphological criteria. It seems correct to consider that in rat Peyer's patches the presence of scarce goblet cells and a large number of enterocytes showing dynamic morphofunctional modifications is related to the functional state and/or to cell cycle.     

法乐氏四联症根治术肺动脉瓣环径及跨环补片宽度的计算方法

计算法乐氏四联症患者的主动脉径开方值,可以建立行法乐氏四联症根治术后肺动脉瓣环应达的标准。本文经过对465例法乐氏四联症根治术的分析,以体表面积分组,以升主动脉径开不同次方,即0.3～0.5m~2范围开四次方,0.6～0.9m~2范围开三次方,1.0～1.6m~2范围开二次方,所得数值与正常标准肺动脉瓣环径间无差别(P>0.05)。这种方法简便、易行、有效。对大部分患者,需跨环补片时,采用标准肺动脉瓣环周长1/3宽度即可达到标准。