一种改进的从橙皮中提取柠檬烯的新方法

本文通过改进传统的实验室提取柠檬烯的装置,提出了提取柠檬烯的新方法.结果表明,新方法提高了提取产物的纯度和产率,缩短了提取时间,简化了实验流程和实验装置,提高了实验安全性.     

“可表演性”的“守”与“弃”——苏珊·巴斯奈特戏剧翻译观剖析

"可表演性"作为戏剧翻译的准则是西方戏剧翻译研究的一个核心问题。围绕苏珊·巴斯奈特在"可表演性"问题上的立场变化,剖析了巴斯奈特戏剧翻译观的形成过程、前后主张以及立场变化原因,力图揭示巴斯奈特戏剧翻译观的构建基础、理论缺陷以及对中国译学理论研究的启示意义。     

Regenerative Medicine-Opportunities and Challenges

In this paper, the definitions and contents of regenerative medicine, including tissue engineering, cell therapy, cytokine therapy and microecologic cure, were presented. And then, the prospects and difficulties for clinical application of these therapies were further mentioned. It indicated that the regenerative medicine came to a new era with full of opportunities and challenges. To face and seize this evanescent opportunity is worthy of detailed discussions.     

用Mathematica软件对无阻力复摆周期的研究

以不受阻力作用的均质细杆作为复摆的物理模型进行复摆周期的研究.应用数学软件Mathematica,首先对任意摆角以椭圆积分表示的周期以及由该公式得到的近似表示到sin6（θ20）高阶项的周期计算.通过比较两者的周期,验证了近似解析式表示周期的适用的摆角范围在0°≤θ0≤40°,其次从复摆摆动的非线性微分方程出发,数值研究在几种因素影响下的复摆周期,得到一些有意义的结果.在我们的研究中特别对复摆的＂小角度＂作出了较好的限定.     

The expression of morphine-induced behavioral sensitization depends more on treatment regimen and environmental novelty than on conditioned drug effects

Both conditioned responses (CRs) and sensitized behaviors induced by addictive drugs are considered to reflect drug-seeking motivation. Based on an excitatory conditioning model of behavioral sensitization, this work hypothesizes that conditioned locomotor activity and locomotor sensitization concomitantly occur using different drug treatment regimens. In the present study, conditioned locomotor activity and sensitized locomotion and stereotypy are assessed with pretreatment of two doses of morphine in a familiar or novel environment. When rats are trained with morphine (3 or 5 mg/kg) in an environment to which the animals are habituated, a CR but not contextual sensitization is induced when tested after 1 week of abstinence. When rats receive the 5 mg/kg dose of morphine immediately after placement into a novel environment, the same results are obtained, but when the drug dose is decreased to 3 mg/kg, both the CR and contextual sensitization are observed. Therefore, the sensitized behaviors, rather than the CR produced by morphine pretreatment, appear to be dependent on the drug treatment regimen and environmental novelty, suggesting that different mechanisms may be involved in the expression of the CR and contextual sensitization.     

熔融法制备盐酸二甲双胍缓释片及其稳定性考察

目的:制备盐酸二甲双胍缓释片并考察其稳定性.方法:以十八醇为骨架材料,采用熔融法制备盐酸二甲双胍缓释片,以体外释放度为评价指标,正交试验设计优化处方,并对制剂进行稳定性考察.结果:十八醇用量和加热温度显著影响盐酸二甲双胍释药速率.优化处方下制备的缓释片体外释放曲线10h内符合Higuchi方程,24个月内主药含量、释放度、有关物质及其他检查项目未见明显变化.结论:通过使用适量十八醇,可获得具有理想释药行为的盐酸二甲双胍缓释片,该制剂稳定性良好.     

带捕食与被捕食结构的恒化器模型的吸引性

主要研究了具有捕食-食饵种群恒化器模型的渐近性态，利用波动引理给出了模型边界平衡点全局吸引的充分条件．     

具有批到达和贝努里反馈的穷尽服务轮询系统分析

研究了具有批到达和贝努里反馈的穷尽服务轮询系统,给出了在平稳状态下队长的分布以及其他一些结果.     

二维Ising模型元胞自动机(Q2R)模拟

用元胞自动机Q2R规则来模拟微正则系综的临界行为,同时考虑到二维Ising模型[2]的同步演化.计算结果表明,此数值仿真能够显示二维晶格在孤立条件下的自发磁化.可以为三维Ising模型的仿真计算奠定基础.