慢性手足癣患者免疫功能的测定

对50例慢性手足癣患者进行体液免疫和体内、外细胞免疫功能的测定。结果表明:患者免疫球蛋白属正常范围;癣菌素皮肤试验中迟发反应阳性率降低;在癣菌素和PHA 作用下,患者白细胞移动指数降低;淋巴细胞转化率及E—玫瑰花结形成率降低;与健康人相比存在显著性差异。     

网果酸模化学成份的研究

本文报道将网果酸模叶用于治疗临床急腹症。首次从中分离出4种成份。经化学方法和光谱分析鉴定,分别为大黄素;大黄酚;槲皮素;槲皮甙。已知这些成份具有抗菌、消炎或止血作用,因而临床的治疗作用可能与这些成份有关。     

DETERMINATION OF POLYDATIN IN POLYGONUM CUSPIDTUM SIEB. ETZUCC. BY TLC-FLUORESCENCE SPECTROPHOTOMETRY

Objective A method of TLC-fluorescence spectrophotometry was established to assay the content of polydatin in polygonum cuspidatum sieb. et zucc. Methods: Polydatin was extracted by methanol and separated with ch‘loroform-acetone-formic acid-water (4:4:0.5:0.2) by thin layer chromatography. The excitation wavelength and emission wavelength were 284 nm and 384 nm, respectively. Results The linear regression equation of the calibrationgraph was y=7.02179x 4.5143, a linear regression correlative coefficient r= 0. 9936. Conclusion This method was proved simple, stable and sensitive. It can be used in quality control of herbs.     

雪莲黄酮总甙对人外周血单个核细胞功能的影响

研究了雪莲黄酮总甙对人外用血单个核细胞（PBMC）功能的影响，结果发现雪莲黄酮单独应用可诱导PBMC细胞毒活性，其浓度在0．6μg／ml时，作用最明显（p＜0．05）。且可显著增强亚适剂量HrIL－2诱导的PBMC的细胞毒活性，而对大剂量IL－2的诱导作用没有影响。     

喷水推进轴流泵三元水力设计

基于环量的三元设计方法和计算流体动力学,研究了叶片数、叶片流向环量中心位置与叶片出口边环量对叶轮性能的影响,分析了导叶进口边和出口边环量对喷水推进轴流泵性能的影响,通过合理地控制这些因素,设计了一种效率高、空化性能好的喷水推进轴流泵。在流量为56.2m3·s-1时,泵的扬程为35.9m,功率为21 465kW,效率为92.3%,可见,设计泵的性能优良,效率高。研究结果表明:增加叶片数能够有效减小单叶片转矩,当叶片数从5个增加到7个时,单叶片转矩减小了21%;叶片环量中心靠近出口边,有利于提高叶轮的空化性能,当环量中心从叶片弦长的0.3处移动到0.7处时,叶轮吸力面空化面积减小80%;叶轮出口边环量斜率会影响叶轮效率,当斜率分别为0.8、1.0和1.2时,叶轮效率逐步提高;当出口边环量从0.40增加到0.50时,叶轮的扬程和功率近似线性增加,扬程增加19.9%,功率增加19.5%;随着导叶进口边环量与出口边环量的比值的增大,泵效率先增大后减小,当比值为0.93时,泵的效率最高;导叶出口边环量分布会影响泵的效率、出口不均匀度和出口周向动能,当导叶出口边环量为-0.05时,泵的效率最高,出口不均匀度和出口周向动能最小。     

Can the Polynomial Based Key Predistribution Scheme Be Used Many Times in One Wireless Sensor Network Key Establishment Protocol？

Key establishment is the basic step for the wireless sensor network (WSN) security. The polynomial based key predistribution scheme of Blom and Blundo et al. has been the basic ingredient for the key establishment for WSNs. It is tempting to use many random and different instances of polynomial based key predistribution scheme for various parts of the WSN to enhance the efficiency of WSN key establishment protocols. This paper indicates that it is not secured in general to use many instances of Blom-Blundo et al. polynomial based key predistribution scheme in a WSN key establishment protocol. Thus the previously constructed group-based type WSN key predistribution schemes using polynomial based key predistribution scheme are insecure. We propose new generalized Blom-Blundo et al. key predistribution schemes. These new generalized Blom-Blundo et al. key predistribution schemes can be used many times in one WSN key establishment protocol with only a small increase of cost. The application to group-based WSN key predistribution schemes is given.     

子波变换及其在股市数据分析中的应用

把股票日收益率看作一维时间信号,通过子波变换与多尺度分析,求出了体现股市数据奇性的Lipschitz指数α。α为负表明在奇点比不连续更加奇异,证明了股票价格的变化是分形的。同时,由文中图示可知,在尺度s很大时,子波变换和多尺度分析可以将股市数据中偶然因素造成的涨跌消除,具有突出主要因素和客观突变点的特点,这一点对于从宏观上预测股价的走势有重要意义。     

雪莲黄酮总甙对小鼠免疫功能的影响

雪莲黄酮总甙４０μｇ／ｋｇ或８０μｇ／ｋｇ可显著提高正常小鼠经ＰＨＡ刺激后的淋巴细胞转化率，提高血清抗绵羊红细胞抗体效价及溶血素的效价。对环磷酰胺造成的免疫抑制状态，雪莲黄酮总甙４０μｇ／ｋｇ或８０μｇ／ｋｇ可使淋巴细胞转化率、抗绵羊红细胞抗体和溶血素效价有所提高。实验结果表明：雪莲黄酮总甙对小鼠免疫功能有明显的促进作用。     

水平旋喷超前预加固新技术在处理隧道坍塌方中的应用

在隧道发生坍塌方后围岩变得极不稳定,特别是在富水未成岩粉细砂地层中,易形成流塑状,导致二次坍塌,造成初期支护背后脱空,收敛变形,严重威胁到施工的安全和质量.详细介绍了兰渝铁路桃树坪隧道出口引进意大利水平旋喷超前预加固新技术对富水未成岩粉细砂层发生多次塌方后的处理技术.