西部高等教育全面振兴的“自强”之道与“助力”之策——第四届西部高教论坛综述

第四届西部高等教育论坛以“提升西部高等教育水平,促进西部经济社会发展”为主旨,探讨了西部高等教育的“自强”之道与“助力”之策。论坛从西部高等教育“振而不兴”的困境出发,从政府、高校和价值层面对问题进行深入分析与反思;以内部“自强”为目标,针对3个层面的问题进行原因剖析并提出对策建议;部分专家学者以历史和域外经验作为参照,探讨如何为西部高等教育的高质量发展“助力”。论坛在反思西部高等教育发展现状的同时,对未来的高质量发展进行了展望。     

Regulatory peptide receptors: visualization by autoradiography

Summary The receptors for regulatory peptides have been extensively characterized using radioligand binding techniques. By combining these binding techniques with autoradiography it is possible to visualize at the light and electron microscopic levels the anatomical and cellular localization of these receptors. In this review we discuss the procedures used to label peptide receptors for autoradiography and the peculiarities of peptides as ligands. The utilization of autoradiography in mapping peptide receptors in brain and peripheral tissues, some of the new insights revealed by these studies particularly the problem of mismatch between endogenous peptides and receptors, the existence of multiple receptors for a given peptide family and the use of peptide receptor autoradiography in human tissues are also reviewed.     

低温对黄瓜几种内源激素含量的影响

为明确黄瓜的耐低温性及脱落酸(ABA)、生长素(IAA)、赤霉素(GA3)、腐胺(Put)、亚精胺(Spd)、精胺(Spm)含量对其生长的影响变化规律,选取耐低温性不同的6份材料9504,9506,9507,9511,9514,9517,进行低温处理,白天12℃,晚上8℃,每天光照处理7.5 h,强度为30μmol(m2.s)-1,约合2 000 lx,共处理14 d。结果表明,在常温下各内源激素含量差异不显著,经低温处理的含量均上升,差异均显著。相关分析表明,耐寒指数与处理后的全部激素含量的偏相关均呈正相关,但均未达显著水平。说明低温使黄瓜幼苗的生长受到一定程度的抑制,但能够通过调节自身的内源激素来减轻低温的伤害,维持植物体的正常生长及生理代谢功能,从而表现出一定的耐低温潜力。     

黄独珠芽浸提液对大白菜种子发芽的影响及休眠期内源激素含量的变化

以黄独珠芽为材料,研究珠芽浸提液对大白菜种子发芽的影响;用ELISA法测定休眠期珠芽GA3、ABA、ZR、DHZR和IAA含量,研究珠芽休眠期内源激素的变化规律.结果表明:珠芽休眠期和萌芽时珠芽基部、中部和顶部浸提液对大白菜种子发芽的影响与对照差异不显著;珠芽休眠期GA3含量下降、ABA与ZR含量上升、GA3/ABA比值下降、IAA和DHZR含量在发芽时与休眠初期相当.黄独珠芽在休眠期和萌芽时不存在种子萌发抑制物,珠芽发芽需要GA3/ABA比值下降,ZR含量升高.     

基于企业家产品水平创新的内生增长模型

建立了一个基于企业家产品水平创新的内生增长模型 ,通过企业家产品水平创新将企业家精神引入了经济增长理论 .通过对模型的竞争均衡分析和社会最优均衡分析 ,分别得出了均衡解 ,并就解的政策含义进行了讨论 .模型的基本结论是 ,企业家的产品水平创新活动是经济增长的一种动力 ,企业家精神越强 ,经济增长速度越快 .     

Stress and putative endogenous ligands for benzodiazepine receptors: The importance of characteristics of the aversive situation and of differential emotionality in experimental animals

The relationships between anxiety/stress, possible endogenous ligands for benzodiazepine receptors and the behavioral modification by drugs are discussed in this short review, including the specific characteristics of elements involved in those interactions, e.g. ones concerning the aversiveness of the stressful situation and the nature of the organism under investigation. These are important factors when considering aversive tasks, insofar as they may involve stressful conditions which differ in intensity and in the degree of control afforded the subject. These characteristics may well lead to differing functional effects on GABA-gated chloride channels or, in other words, to an incongruous balance between endogenous benzodiazepine receptor agonist and inverse agonist activity. This is not surprising, as it is well known that different forms of stressors often actually produce divergent behavioral, physiological and biochemical effects. This review also illustrates the necessity of taking into account the variable effects of stressors and/or drugs on animals differing in reactivity or emotionality, even in the case of non-selected stocks. The implication is made that, by genetic and/or environmental manipulation of the emotional state of the animals used, it will be possible to obtain more clearly definable results in neuropharmacological and psychopharmacological studies.     

交易效率、专业化分工与跨国并购理论探讨

基于新古典经济学和新制度经济学框架下的跨国并购理论不能为多种形式的跨国并购活动提供一般理论.以新兴古典经济学为分析框架,提出了跨国并购的一般理论,并进一步分析了三种形式的跨国并购理论的现实意义.     

Xenozoonoses in xenotransplantation

Pig to human xenotransplantation is one of the possible ways to solve the problem of organ shortage, but the potential risk of xenozoonoses hinders the progress of xenotransplantation. Among pathogens that might cause xenozoonoses, porcine endogenous retrovirus (PERV) is undoubtedly the most noticeable. Current researches show that PERV exists in pigs' genomes and is able to express in multiple tissues and organs in pigs. Other experiments also show that PERV could successfully infect several human cell lines in vitro and could infect SCID mice through pig to mouse islet transplantation. The discussion and research on the risk of PERV is one of the hottest topics in current xenotransplantation, but the question of whether PERV will transmit to human through xenotransplantation has not been answered due to the lack of suitable animal models. More work should be done to evaluate the risk of xenozoonoses caused by PERV after pig to human xenotransplantation.     

一种新的提取事件相关电位的退同步平均技术

指出了传统事件相关电位研究中的突现刺激会诱发外源性成分污染内源性认知成分 ,并导致注意自动俘获 .通过让符号串相对于视线移动来模拟自然阅读 ,发现了字符串中的串首和串尾符号会诱发出外源性成分 ,但串中的准持续呈现字符不会诱发外源性成分 .在此基础上 ,提出了一种去同步平均技术 ,利用该技术能够消除外源性成分干扰和注意的自动俘获 ,直接提取内源性认知成分     

借款约束、分配与增长的理论与实证分析

作者构建了内生增长模型，分析了在信用市场不完善时收入分配对经济增长影响的作用机制，理论分析表明在有借款约束时初始收入分配差距不利于经济增长。利用我国两个时期的跨省横截面数据进行了实证分析，结果表明我国90年代后期的收入分配差距阻碍了经济增长，人力资本的积累特别是初等和中等教育以上的人力资本积累有利于经济增长。