LDPE／CPE／炭黑三相复合导电体系的电学性能

研究了ＬＤＰＥ／ＣＰＥ／炭黑三相复合导电体系的导性能和电流－电压特性。实验结果表明复合体系具有明显的导电渗滤效应，在共混比ＬＤＰＥ／ＣＰＥ＞５０／５０时，导电性能随ＣＰＥ含量增加而显著提高，这主要是由于炭黑粒子在ＬＤＰＥ和ＣＰＥ两组分分中的分布不均匀性所致。     

An electron microscopic study of Aujeszky's disease

Summary Sixteen calves were killed at intervals during the course of the disease from 48 h onwards after subcutaneous infection with Aujeszky's disease virus. Ultrastructural changes were evident in the spinal ganglia from 84 h post-inoculation and the intercostal nerves from 96 h post-inoculation. The cytopathic changes in the spinal ganglia consisted of neuronal degeneration, neuronophagia, Schwann cell degeneration and cellular infiltration. The neuronophagic nodule was invariably contained within an intact sheath of satellite cells. Changes in the intercostal nerves were less dramatic but cellular infiltration was frequently seen and occasional Schwann cells were degenerate. In the terminal stages of the disease demyelination was rarely observed. In the ganglion virus was invariably seen in degenerating neurons and occasionally in Schwann cells and monocytes. Satellite cells were rarely infected even when ensheathing an infected neuron. Extra-cellular virus was not observed in ganglia or nerves. Schwann cells and monocytes in the nerves were occasionally infected. Virus particles were seen in the axoplasm both in the ganglion and in the entire length of the nerve. The particles in the axoplasm varied in morphology; thus unenveloped and enveloped particles, and particles in the process of acquiring an envelope were recognised. It was concluded that the neural pathway of Aujeszky's disease virus is probablyvia the axoplasm.     

肾综合征出血热病毒气溶胶的物理稳定性实验研究

本文采用荧光素钠正常鼠脑悬液做模拟示踪物质，对肾综合征出血热病毒气溶胶在空气中的物理稳定性进行了测定，并与其生物稳定性做了比较。结果表明：病毒气溶胶的粒子大小在１ｕｍ左右，它随气溶胶的胶龄增长而减少，且其分散度变窄。初始气溶胶的物理回收率及其各胶龄的物理存留率均明显地高于它的生物回收率和生物存活率。本文还就肾综合征出血热病毒气溶胶的物理稳定性和生物稳定性，对本病空气传播的影响进行了讨论。     

Generation of HIV-1 Virus-Like Particles expressing different HIV-1 glycoproteins

Elicitation of a potent and broadly neutralizing antibody response is the main goal of an effective preventive HIV-1 vaccine. It has been shown by us and others that the expression of Env glycoproteins on the surface of particulate structures, such as Virus-Like Particles (VLPs), could be a more efficient strategy to deliver conformational epitopes to the immune system.To this aim, VLPs expressing native HIV Env gp140 or gp41 glycoproteins have been produced in insect cells using a baculovirus expression system and characterized for appropriate protein expression. VLP-bound HIV gp140 glycoprotein showed the appropriate expression and trimeric conformation. Immunogenicity studies have been performed in BALB/C mice by intra-peritoneal administration and sera from immunized mice have been tested in ELISA assays, for their reactivity with HIV specific antigens, as well as in ex vivo neutralization assay.Sera from immunized animals showed a high reactivity with individual HIV proteins expressed in VLPs. Results of TZM-bl based neutralization assay show that combined sera from animals independently immunized with gp140- or full-length-gp41-expressing VLPs have an additive/synergistic effect in the neutralization activity of HIV pseudoviruses.In conclusion, novel VLPs expressing different HIV Env glycoproteins with native trimeric conformation have been generated, showing the induction of effective antibody response with neutralization activity in TZM-bl neutralization assay. These results confirm the effectiveness of VLPs as presentation and delivery system for conformational proteins and show the improved neutralization activity upon the combination of anti-sera elicited by different HIV envelope antigens, suggesting the possibility of broadening the spectrum of viral epitopes targeted by immune response.     

HPLC法同时测定小儿抗病毒颗粒中黄芩苷和橙皮苷的含量

目的：建立反相高效液相色谱法同时测定小儿抗病毒颗粒中黄芩苷和橙皮苷含量的方法。方法：色谱柱为Shim—packVP—ODSC18柱（150mm×4．6mm,5μm）;流动相为乙腈-水-磷酸（21：79：0．1）;流速1．0mE／min;检测波长：283nm。结果：橙皮苷在0．260～0．520μg范嗣内、黄芩苷在0．270—0．720μg范围内与峰面积呈良好的线性关系（橙皮苷r=0．99997、黄芩苷r=0．99996）,平均回收率分别为99．37％和101．8％;RSD分别为1．52％和0．63％（n=6）。结论：该方法简便,结果准确,重现性好,可作为该制剂的质量控制方法。     

小儿健脾膏促胃肠动力作用研究

目的 观察小儿健脾膏对离体豚鼠回肠和大鼠胃肌收缩、在体大鼠胃肌收缩及整体小鼠胃排空与肠推进的影响。方法 离体和在体实验中,运用生物机能实验系统检测小儿健脾膏对回肠和胃肌收缩张力的影响;整体实验中,运用称重法和标记法测定小鼠胃排空率与肠推进比率。结果 离体实验中,不同剂量的小儿健脾膏均可增大豚鼠回肠和大鼠胃肌的平均收缩幅度;在体实验中,中、高剂量小儿健脾膏可显著增加大鼠胃肌的平均收缩幅度,且高剂量对大鼠胃肌的收缩与新斯的明具有协同作用;整体实验中,不同剂量的小儿健脾膏均能显著加速阿托品所致胃肠动力障碍模型小鼠的胃排空与肠推进。结论 小儿健脾膏具有促进胃肠动力的药理作用。     

HPLC法测定益心颗粒中五味子醇甲的含量

目的 建立益心颗粒中五味子醇甲的含量.方法 采用高效液相色谱法.Welch Materials Cl8色谱柱（4.6mm×250mm,5μm）;流动相：甲醇-水（68：32）;检测波长：250nm;流速：1.0mL·min-1;柱温：25℃;进样量：10μL.结果 五味子醇甲在2.172μg·mL-1～34.752μg·mL-1范围内与其峰面积线性关系良好（r=0.9999）,平均回收率为98.93%,RSD为1.07%.结论 该方法快速、简便、结果可靠,可用于控制益心颗粒的质量.     

小儿豉翘清热颗粒治疗小儿病毒性发热疾病108例疗效观察

目的观察小儿豉翘清热颗粒治疗小儿病毒性发热疾病的疗效。方法将108例以病毒性发热疾病为主的患儿完全随机分为观察组和对照组。观察组54例予以小儿豉翘清热颗粒,根据患儿不同年龄给予1～6g,开水冲服;对照组54例予以利巴韦林颗粒10mg／（kg·d）。均为3次／d,疗程3d。观察2组疗效和症状好转时间。结果用药3d后,观察组与对照组总有效率分别为92．6％（50／54）和68．5％（37／54）,组间比较差异有统计学意义（P〈0．05）;观察组的退热时间、咽部充血好转时间、咳嗽好转时间明显少于对照组[（26±4）h比（38±6）h,（36±8）h比（48±6）h,（36±4）h比（47±6）h],差异均有统计学意义（均P〈0．05）。结论tbJL豉翘清热颗粒治疗小儿病毒性发热疾病安全疗效较好,症状改善快。     

高效液相色谱法测定小儿清火宝颗粒中牡荆苷的含量

目的：建立测定小儿清火宝颗粒中牡荆苷含量的高效液相色谱方法。方法：采用Dionex—C18柱（250mm×4．6mm,5μm）,以乙腈-0．2％冰醋酸水溶液（19：81）为流动相,流速1．0mL/min,柱温30℃,检测波长331nm。结果：牡荆苷在0．017～0．340ms／mL浓度范围内与峰面积有良好线性关系（r=0．9999）,平均加样回收率为98．0％,RSD小于2．0％。结论：本方法简便、快速、准确、重复性好,可用于小儿清火宝颗粒中牡荆苷的含量测定以及该制剂的质量控制。