尿石通颗粒质量标准的研究

目的 :建立尿石通颗粒的质量控制方法。方法 :用薄层色谱法对尿石通颗粒中的连钱草进行定性鉴别 ;以芦丁为对照品 ,采用分光光度法法测定颗粒中总黄酮 (以芦丁计 )含量。结果 :薄层色谱中斑点清晰 ,易于识别 ;分光光度法重复性好 ,总黄酮在 8.7～ 6 9.6 μg·ml-1浓度范围内呈线性关系 ,r =0 .9999,平均加样回收率 97.5 % (n =5 ) ,RSD =2 .8%。结论 :本法可有效地控制尿石通颗粒的质量。     

脱卷积法进行自制尼群地平缓释制剂体内外相关性研究

目的用脱卷积法进行自制尼群地平缓释制剂体内外相关性的研究。方法以自制尼群地平口服溶液剂的犬体内血药浓度数据为权函数，根据3种自制尼群地平缓释制剂试验犬体内血药浓度数据，采用脱卷积法计算体内释药特性，与相应的体外释药特性进行比较，考察体内外相关性。结果用脱卷积法计算3种尼群地平缓释制剂的体内外释药相关性良好。结论脱卷积法适用于自制尼群地平缓释制剂的体内外相关性研究。     

降脂利肝颗粒对大鼠高脂血症及脂肪肝的防治作用

目的:观察降脂利肝颗粒对动物的实验性脂肪肝的预防和治疗作用.方法:高脂饮食后腹腔注射硫代乙酰胺引起严重肝功能损害,并形成脂肪肝的动物模型,给予高、中、低三组剂量的降脂利肝颗粒及阳性对照药物.结果:造模动物口服降脂利肝颗粒后,动物的血清AST(谷草转氨酶),ALT(谷丙转氨酶)及其他肝功能指标明显下降.结论:降脂利肝颗粒对动物的实验性脂肪肝有明显的预防和治疗作用.     

酸克糖颗粒的质量标准研究

目的：建立酸克糖颗粒的质量控制方法。方法：采用薄层色谱法鉴别其所含山茱萸、白芍，薄层扫描法测定其熊果酸的含量。结果：薄层色谱法鉴别专属性强、重现性好。熊果酸的含量测定线性范围为0．24～1．20μg，回归方程Y=7186．3 X-1356.4，相关系数r=0.9972；加样回收率为100．5％，RSD=2．4％(n=5)。结论：方法操作简便、可行，可用于酸克糖颗粒的质量控制。     

HPLC法测定复方联苯双酯颗粒中肌苷的含量

目的:应用HPLC色谱法测定复方联苯双酯颗粒中肌苷的含量.方法:采用C8柱以甲醇-水(60:40)为流动相,检测波长为248 nm.结果:肌苷线性范围为2.50～25.00μg·ml-1,r=0.999 97(n=6).肌苷平均回收率100.1%,RSD 0.4%(n=9).结论:方法简便,结果准确,重复性好.     

吲哚美辛肠溶包衣微丸的制备及其释放度的研究

 目的:制备吲哚美辛肠溶包衣徽丸，考察其释放特性。方法:采用正交试验设计筛选徽九的处方、工艺参数，用滚动凝聚法制备素丸，用沸腾包衣技米制备微丸，通过溶出试验考察其释放特性。结果:以优选处方、工艺制备 的徽丸在规定的酸性介质中几乎不释放，而在碑酸盐缓冲液中则释放80%以上。结论:本品处方合理，制备工艺简单，能达到肠溶目的，可降低或消除吲哚美辛在临床上使用的毒副作用。     

ALTERATIONS OF THE ENTERIC NERVOUS SYSTEM IN NEONATAL NECROTIZING ENTEROCOLITIS REVEALED BY WHOLE-MOUNT IMMUNOHISTOCHEMISTRY

Pathology reports on neonatal necrotizing enterocolitis (NNEC) rarely consider its effects on the enteric nervous system (ENS). Thus, the aim of this study has been to perform a two-dimensional assessment of neuropathologic lesions within the three ganglionated plexuses of the intestinal wall by means of whole-mount immunohistochemistry. Resected segments of ileum and colon affected by acute NNEC were submitted to immunohistochemical procedures using antibodies against neuronal (protein gene product 9.5) and glial (protein S-100, glial fibrillary acidic protein) proteins. Examination of the myenteric plexus and external submucosal plexus revealed a noticeable reduction in glial cells concomitant with the gradual deterioration of nerve cells, both findings predominating in the antimesenteric intestinal circumference, where ischemic lesions tend to appear first. The most severe damage of nervous tissue was observed in the plexus submucosus internus dependent on the depth of mucosal injury. The destroyed ganglia appeared like "empty baskets" (residual tangles) and housed deteriorated nerve and glial cells. Taking the anatomy of the intestinal vascular blood supply into consideration, the characteristic topography of neuropathologic lesions gives further support to an ischemic event within the cascade of different pathogenetic factors culminating in NNEC. Moreover, the demonstrated alterations of the ENS and their potential adverse effects on intestinal motility and neuroimmunologic interactions may contribute to the complex pathogenesis of NNEC, which remains a field of further investigation.     

Nutritional status and diarrhoeal pathogen in hospitalized children in Bangladesh

We studied the relationship between nutritional status and infection due to specific enteropathogens in young children with diarrhoea. Overall, 26% of the children were severely underweight, 27% were severely wasted and 19% were severely stunted. Children with Shigellae and V. cholerae O1 were significantly more severely underweight, wasted and stunted than those with rotavirus diarrhoea ( p < 0:0001). Our results indicate that an effective nutrition programme for young children might have greater impact on diarrhoeal illness caused by Shigella and V. cholerae than by rotavirus diarrhoea.     

仙龙冲剂的抗肿瘤活性及其作用机理的研究

目的:研究仙龙方的体内、体外抑癌作用及机理。方法:用 BALB/C 小鼠,荷肝癌和艾氏癌实体瘤,经口给药,观察肿瘤的抑制程度和动物的生存状况。结果:给药组肿瘤生长曲线明显低于对照组。仙龙方还能延长荷瘤动物的生存期,生命延长率为30%～69%。体外实验显示仙龙方对人癌细胞的抑制有一个良好的剂量—效应关系,肝癌的曲线之回归系数 r=0.9983,IC_(50_值为14.8±2.8μg/ml;胃癌曲线的系数 r=0.9995,IC_(50)值为9.7±5.1μg/ml,表明胃癌细胞更敏感些。细胞学研究发现癌细胞的不同程度的损伤、核染色质的凝聚现象及内质网肿胀,流式光度术分析 DNA 组方图上出现了凋亡峰。结论:仙龙方有诱导癌细胞凋亡作用。     

乙基纤维素作为包衣材料在缓释盐酸苯丙醇胺树脂上的应用

 目的：考察影响药树脂体外溶出的因素，制备缓释盐酸苯丙醇胺(PPA·HCl)树脂。方法：以不同粘度规格的乙基纤维素(EC)为包衣膜材料制备缓释PPA·HCl树脂，以体外溶出试验，考察了树脂粒径、EC粘度、EC包衣增重百分率、EC分散介质(水或乙醇)以及体外释放介质的pH值和离子强度对上述缓释药树脂体外溶出的影响。结果：上述因素对药树脂的释药均有不同程度的影响，以EC 200 Pa·s包衣增重达150 g·kg^-1时，包衣药树脂在0.1 mol·L^-1HCl中的释放符合美国药典23版缓释PPA·HCl胶囊的要求。结论：用乙基纤维素为包衣膜材料，可以制备缓释PPA·HCl树脂。