《合同法》第121条中“第三人”的理解与适用

为科学界定债务人违约的不同情形,《合同法》第121条对此作了专门规定。但其内涵有待进一步明确。对“第三人”的界定涉及到合同的相对性原理,并在实践上影响合同双方当事人的利益平衡。第三人的范围应采取较为严格的标准,这有经济、公平等方面的考虑。     

以DFE为导向的环境教育课程设计研究——以《生态公园模型设计》课程为例

环境教育是提升环境行动能力的重要途径,对推进生态文明建设有重要意义。目前环境教育虽已有长足进步,但实际开展中仍存在内容散落、学科领域狭窄、实践性不足等问题。在分析中国环境教育现状与问题基础上,从环境教育综合性、实践性的特点以及引导学生主动参与解决环境问题的角度,建构了以DFE导向的初中环境教育课程模型,并以上海市初中为例进行《生态公园模型设计》课程案例设计与实践。学生在校内外教师共同组成的跨学科教学团队指导下,以设计者角色参与立足真实环境问题的DFE工程设计过程,采用校外实地调查和校内设计制作相结合的实践活动形式,帮助学生获得解决环境问题的能力,树立热爱环境的情怀,理解“人与自然是生命共同体”理念。     

国外对服务外包研究的现状、启示及评价

外包即外部资源利用,是指企业在内部资源有限的情况下,将其非核心业务通过合同方式分包给其他承接企业,而自己则专注于核心业务的发展,利用外部最优秀的专业化资源,达到降低成本、提高效率、发挥自身核心竞争力和增强企业对环境的应变能力的目的。以现代服务业以及高端制造和研发环节转移为主要特征的新一轮世界产业结构调整正席卷全球,为中国发展面向国际市场的服务外包提供了新的机遇。     

从中国地方政府门户网站测评结果看其发展趋势

作者对我国31个省(市、自治区)的93个省会城市、地级市、县级政府门户网站进行了3年的测评研究。通过对测评结果的对比分析,预测了中国地方政府门户网站发展的趋势。     

Simultaneous Quantitative Determination of Amphetamines,Opiates, Ketamine,Cocaine and Metabolites in Human Hair: Application to Forensic Cases of Drug Abuse

A method using liquid chromatography–tandem mass spectrometry (LC–MS/MS) to simultaneously quantify amphetamines, opiates, ketamine, cocaine, and metabolites in human hair is described. Hair samples (50 mg) were extracted with methanol utilizing cryogenic grinding. Calibration curves for all the analytes were established in the concentration range 0.05–10 ng/mg. The recoveries were above 72%, except for AMP at the limit of quantification (LOQ), which was 48%. The accuracies were within ±20% at the LOQ (0.05 ng/mg) and between −11% and 13.3% at 0.3 and 9.5 ng/mg, respectively. The intraday and interday precisions were within 19.6% and 19.8%, respectively. A proficiency test was applied to the validated method with z-scores within ±2, demonstrating the accuracy of the method for the determination of drugs of abuse in the hair of individuals suspected of abusing drugs. The hair concentration ranges, means, and medians are summarized for abused drugs in 158 authentic cases.     

抗禽脑脊髓炎病毒单克隆抗体的制备及鉴定

利用提纯的禽脑脊髓炎病毒(AEV)VR株CEF适应毒制备抗原,免疫BALB/c小鼠,应用杂交瘤技术以间接ELISA筛选获得1株分泌抗AEV(VR)单克隆抗体的杂交瘤细胞.对制备的细胞上清及腹水进行单克隆抗体特性鉴定,经染色体计数、免疫球蛋白类及亚类测定、特异性试验、稳定性试验、SDS-PAGE电泳,表明该杂交瘤细胞染色体数目介于90-110条,该单克隆抗体亚类为IgG2a,分子质量为142 ku,ELISA测定细胞上清效价为11×104,腹水效价为11×106,与其它病原无交叉反应,抗体分泌稳定.     

侦破全国首例高考试卷被盗案的几点反思

今年四川省南部县发生了全国首例高考试卷被盗案。该案的成功告破,再次显示了 四川省公安机关的强大战斗力。同时也有一些经验教训值得反思。     

Analysis of penicillins in whole blood by reversed high-performance liquid chromatography

A reversed-HPLC method was established to determinate penicillins in whole blood. Thiamphenicol as internal standard was added to 0.5 ml blood. Proteins in blood were precipitated with acetonitrile, then the separate supernatant was directly injected onto the chromatography column. The range of five penicillins' linearities was 0.9918 to 0.9996, their range of relative recovery was 91.75% to 107.33%, their CV was 3.56% to 9.85%. Effects of different storage temperatures on the stability of analytes and interference of other antibiotics were also studied.     

试析中国处理中印边境武装冲突的斗争艺术

１９６２年的中印边境自卫反击战，作为军事、政治、外交斗争的综合较量，体现了中国共产党人非凡的政治胆识和高超的斗争艺术。研究６０年代中国政府为捍卫祖国领土完整、打击地区扩张主义、解决边界冲突与矛盾所采取的原则立场，无疑有助于中印边界问题的最终解决。 中印边界全长２千公里，分东、中、西段，历史上从来没有正式划定过，是中印关系中存在的历史遗留问题。１９世纪中叶以前，双方根据历史行政管辖所及，形成了传统习惯线，两国地图均按传统习惯线标画边界。然而，在英国统治了印度后，中印边界被打上了殖民烙印。在东段，英…     

南疆重镇喀什

<正>Your journey starts here.In fact Kashgar may be both point of departure and last stop in beginning to understand Xinjiang.Like small flakes of an ancient mirror embedded in a pillow,today’s Kashgar Prefecture in far western China reflects past times when it was a central station for bartering,the precious goods trade,cultural and religious infusion,and wealth accumulation.Abutting the Taklamakan Desert,Kashgar through the