用差示扫描量热法及激光拉曼光谱研究足叶乙甙对二棕榈酰磷脂酰胆碱脂质体膜流动性影响

本文用DSC和激光拉曼光谱研究抗癌药物足叶乙甙(4-去甲基表鬼臼毒素-β-D-乙叉吡喃葡萄糖甙,简称VP 16-213)与二棕榈酰磷脂酰胆碱(DPPC)脂质体的作用。VP 16-213分子掺入DPPC脂质体双层中,不但使相转变温度向高温移动,而且吸热峰的半高宽度随VP 16-213浓度增加而变宽。其Raman光谱在频率2850 cm~(-1)处的C-H键对称伸缩振动亦随着药物浓度增加而减弱。这些结果表明VP 16-213分子是定域在脂双层中DPPC分子链的C_1～C_9亚甲基区域,使脂质体的有序性提高而流动性降低。     

Spontaneous perinephric and subcapsular renal hemorrhage: evaluation with CT, US, and angiography

Eighteen consecutive patients with acute spontaneous perinephric hemorrhage were examined with computed tomography (CT) (n = 18), ultrasonography (US) (n = 15), and angiography (n = 9). Renal cell carcinoma was found in 10 patients; angiomyolipoma, three; and segmental renal infarction, arteriovenous malformation (AVM), hemorrhagic cyst, abscess, and idiopathic hemorrhage, one each. Initial CT examinations demonstrated the extent of hemorrhage in all cases and a distinct mass in 12 (67%), with CT characteristics suggestive of the correct diagnosis in 11. In the other six patients (33%), a discrete mass was not seen at initial CT, and in five cause of hemorrhage was not clear. Two of the five underwent follow-up CT, which correctly demonstrated carcinoma in both. Overall, CT findings suggested the correct diagnosis in 14 patients (78%). US was sensitive for detection of an abnormality but nonspecific as to its nature. Angiography demonstrated unsuspected AVM in one patient, segmental renal infarction seen at CT in one, but only one of five carcinomas suspected at CT. Data from this study suggest that CT is the most valuable examination for patients with spontaneous renal hemorrhage.     

单克隆抗体BDI－I导向的阿霉素白蛋白毫微球对人膀胱癌细胞的特异杀伤活性

用化学偶联法将抗人膀胱癌单克隆抗体分子偶联到阿霉素白蛋白毫微球上，构建了一个有靶向杀伤性的免疫毫微球，即：阿霉素白蛋白载单克隆抗体毫微球（ＡＤＲ－ＮＰ－Ａｂ）。改变阿霉素毫微球和单克隆抗体的反应分子比，确定了制备该免疫毫微球的最佳条件。经免疫荧光检测及显微照像分析证明，免疫毫微球可有效地和人膀胱癌细胞结合。体外杀伤试验表明，此免疫毫微球对靶细胞ＥＪ有高度特异杀伤活性，而对无关的人直肠癌Ｌｏｖｏ细胞则无明显作用。     

Transverse esophageal folds: association with corrosive injury

Two cases are presented in which transverse esophageal folds were observed in children following ingestion of corrosive material. Strictures developed at the sites that initially manifested this serrated mucosal appearance. These findings lend additional credence to the concept that transverse folds, reflecting contractions of the muscularis mucosae, represent a pattern of pathologic motility rather than merely a variant of normal mucosal anatomy.     

Renal vein thrombosis in patients with nephrotic syndrome: CT diagnosis

A retrospective evaluation of the computed tomography (CT) findings in 50 patients with the nephrotic syndrome was undertaken. In four patients with clinical manifestations of acute renal vein thrombosis (RVT) on initial examination, the diagnosis was confirmed by CT findings. Three patients had left RVT, one had right RVT, and all four had thrombus in the inferior vena cava (IVC) at the level of the renal veins. Of the remaining 46, otherwise asymptomatic patients, one had bilateral RVT, two had left RVT, and five had isolated IVC thrombus. The abnormalities noted on CT scans were widened renal vein(s) containing thrombus, thrombus in the IVC, renal enlargement, thickened Gerota fascia and formation of pericapsular venous collaterals, and an abnormal renal parenchymal enhancement pattern consisting of prolonged corticomedullary discrimination, delayed and/or persistent paraenchymal opacification, and delayed or absent pyelocalyceal visualization.     

氧氟沙星泡腾片的制备及质量考察

目的：研制氧氟沙星泡腾片并建立该制剂的质量控制标准。方法：用酸、碱分开制法制备氧氟沙星泡腾片，并对其性状、重量差异、崩解时限、酸度、鉴别、含量测定、稳定性等进行了检测。结果：本品处方；制备工艺简单、制备工艺简单、质量稳定。结论：本品可作为氧氟沙星制剂新品种的开发。     

导数比率法测定维磷补汁中咖啡因的含量

本文应用国产7520紫外分光光度计,用导数比率法,测定维磷补汁中咖啡因的含量。标准曲线的相关系数r=0.9996。平均回收率为100.2%,CV=0.11%。