监护职责和监护责任--以《学生伤害事故处理办法》第7条为例

监护职责与监护责任在实际生活中往往被混为一谈。在处理学生伤害事故时，学校和监护人的责任，到底是一种什么责任，也往往引起人们的误解。监护职责与监护责任属于不同的范畴，两者在内容和能否约定转移上都有着明显的不同。     

网络对当代大学生的影响

互联网使大学生获取丰富的信息、接受新知识、了解世界的同时,也带来了许多不容忽视的负面影响。文章通过对新疆高校的调查,依据大量可靠的事实和数据,从大学生的学习、思想道德、人际交往等层面分析了网络对新疆大学生的影响,提出了相应的建议与对策,以促进大学生网上活动能深入持久、健康地进行。     

基于IP多播的机房信息管理系统的设计与实现

提出了一种基于IP多播技术的解决方案并加以实现,满足了对上机学生按系或班级分组进行管理与各类统计的需要,实现了传统C/S结构所能实现的全部功能,解决了传统机房信息管理系统使用带来的问题。     

从电子设计竞赛看单片机实验教学的改革与创新

结合电子设计竞赛的内容及特点,从当前社会发展对高素质、创新人才的需求出发,为提高学生运用理论知识去解决实际问题的能力,对单片机原理及应用课程实验内容和方法的改革进行了探讨.     

Specific binding of antigenic peptides to cell-associated MHC class I molecules

T lymphocytes recognize antigen in the form of peptides that associate with specific alleles of class I or class II major histocompatibility (MHC) molecules. By contrast with the clear MHC allele-specific binding of peptides to purified class II molecules purified solubilized class I molecules either bind relatively poorly or show degenerate specificity. Using photo-affinity labelling, we demonstrate here the specific interaction of peptides with cell-associated MHC class I molecules and show that this involves metabolically active processes.     

Characterization of the rough endoplasmic reticulum ribosome-binding activity.

The rough endoplasmic reticulum membranes of mammalian cells contain specific ribosome-binding sites. A purification to apparent homogeneity of a negatively charged protein (ERp180) of relative molecular mass 180,000 (180 K) was reported which was proposed to function as a rough endoplasmic reticulum ribosome receptor. We report here that ribosome-binding site activity quantitatively solubilized from rough endoplasmic reticulum membranes does not cofractionate with ERp180. By contrast, ribosome-binding site activity fractionates as a much smaller, positively charged protein.     

Genotoxic effects of dithane M-45 on the bone marrow cells of mice in vivo

Genotoxic effects of dithane M-45 were studied on the bone marrow cells of male albino mice (Lacca strain) in vivo. Different doses (30 mg, 40 mg and 300 mg/kg b.wt) of dithane M-45 were injected intraperitoneally and their effects were investigated after time intervals of 1, 2, 5 and 10 days. The chromosomal aberrations observed in the bone marrow cells of male mice after treatment with dithane M-45 were fragments, rings, dicentric chromosomes, terminal chromatid deletions, chromatid gaps and breaks. In addition to these chromosomal aberrations, physiological effects such as uneven stretching of chromatin material, end-to-end chromosomal associations, exchange configurations, clumping, stickiness and centromeric associations were also observed.     

基于灰色系统理论的区域科技竞争力比较

提出区域科技竞争力的内涵，构造科技竞争力评价指标体系，基于灰色系统理论的关联度分析方法，对我国长江三角洲、珠江三角洲和环渤海经济圈三大经济区域的科技竞争力进行了比较分析，提出了相应的对策建议。     

秋水仙素诱导青虾次级卵母细胞二倍体初探

以青虾卵巢为材料，采用秋水仙素诱导多倍体次级卵母细胞．经滴片试验，确立此实验最佳滴片高度为1．5cm，通过设置5个秋水仙素浓度(0．08～0．40mg／mL)及3个作用时间(6～24h)，观察发生染色体加倍的细胞相对数目．实验结果表明：在使用秋水仙素的浓度为0．08～0．40mg／mL，处理6～24h时都可以获得多倍体卵细胞．在秋水仙素浓度是0．32mg／mL，处理6h可得到最高二倍体突变率(32．58％)．还测试了0．32mg／mL COM作用6h时ATPase活性与生理盐水对照组的变化，结果显示COM会在一定程度上影响细胞的新陈代谢．但是50％左右的成活率表明，这种诱导突变的方法仍具有一定的应用价值．     

非税收入管理探索

非税收入日益成为各级政府财政收入的重要组成部分，在地方经济建设及社会各项事业发展中发挥着重要作用。如何规范非税收入的征收、管理、使用，己成为各级政府及财政部门迫切需要解决的问题。推进非税收入管理改革，将会进一步促进财政支出改革，为建立公共财政体制框架奠定基础。