School programs to prevent intrafamilial child sexual abuse     

Marla R. Brassard  Ann H. Tyler  Thomas J. Kehle 《Child abuse & neglect》1983,7(2):241-245

The incidence of child sexual abuse would argue for the schools assuming a larger role in the development of preventive and educational programs. Because of the public school system's consistent and longitudinal contact with children and families it is perhaps the most promising institution for the delivery of preventive efforts. This article presents specific suggestions for school-based programs directed toward the prevention of intrafamilial child sexual abuse. Further, it is argued that for maximum effectiveness, the support of local parent-teacher organizations be elicited; that educational programs be presented separately for parents and children; and that a variety of programs in concert with the development level of participants be presented on topics related to child sexual abuse. Topics regarded as important for prevention efforts are factual information on sexual abuse, appropriate and inappropriate touch, the respective role responsibilities and rights of parents and children, and a sex education approach that stresses the values of nonexploitation and discrimination in the choice of whether to engage in sexual behavior and the choice of partners.  相似文献   

薄层色谱法对几种氨基酸鉴定实验的改进     

张秋霞  郭航鸣 《金华职业技术学院学报》2001,1(3):45-46

目的：改进常用薄层色谱法定性鉴定氨基酸实验中常出现展开效果差，易拖尾，重复性差等不足问题，探讨微乳氨基酸乳液展开剂的性能和效果。方法：采用十二烷基硫酸钠／正丁醇／正己烷／水配制成微乳液作为展开剂，对教学中常见的5种氨基酸进行微乳薄层色谱法分析。结果：展开效果好，色谱性能稳定，重现性良好。结论：微乳液在氨基酸薄层色谱教学中是可采用的一种方法。  相似文献   

高校教育游戏研发团队建设的研究——以浙江师范大学教育游戏研发基地为例     

肖飞生  章苏静 《宁波大学学报(教育科学版)》2008,30(5):94-97

通过团队建设实践的视角,整合管理学和心理学有关知识,在行动中研究基地研发团队建设的规律和特点一一将团队定位为非正式的学习型、实践共同体,通过信息化协作平台和社会性软件对团队进行信息化管理,利用大学生多媒体作品设计竞赛的良好评价机制以及精神和物质激励,引导团队健康发展,并通过有组织招募与个人招募相结合来优化团队建设。  相似文献   

农业技术的公共性及其研发主体研究     

肖爱清 《福建师大福清分校学报》2008,(4):26-31

农业技术创新活动具有较强的公共性。公共性的差异决定了其在技术创新活动中政府与企业的主体关系。依据非排他性由强到弱的程度,可以将农业技术分为三类：纯公共性农业技术、半公共性农业技术、专有性农业技术。根据农业技术非排他性或者公共性的强弱程度来判断政府和企业的介入程度,为不同领域的农业技术研发确定不同的研发主体,理清在农业技术研发活动中的政府和企业关系。  相似文献   

Embryonic stem cells and their genetic modification
Nobel prize in Physiology or Medicine 2007     

Mitradas M. Panicker 《Resonance》2008,13(2):172-180

The derivation of embryonic stem cells from mice and the development of techniques that allow for targeted manipulation of its genome have allowed for the generation of mice with desired mutations. This is what led to the announcement in Stockholm in 2007 — “The Nobel Assembly at Karolinska Institute today decided to award the Nobel Prize in Physiology or Medicine for 2007 jointly to Mario R Capecchi, Martin J Evans and Oliver Smithies for their discoveries of Principles for introducing specific gene modifications in mice by the use of embryonic stem cells”. Martin J Evans was recognised for his derivation and establishment of mouse embryonic stem cells while Mario Capecchi and Oliver Smithies were honoured for techniques that allowed site-specific modification of sequences within the genome of these cells. Such cells were then used to generate animals that had their genome altered specifically and at desired locations. For this valuable body of work, all three shared the prize equally. To date, almost half of the genes in the mouse genome have been modified using their techniques. This has led to a better understanding of mammalian physiology, development and diseases. Mitradas M. Panicker is on the faculty of the National Centre for Biological Sciences, Bangalore, India. His research interests include stem cells, serotonin and its receptors and neurobiology.  相似文献   

The influence of pollutants on accelerated ageing of parchment with iron gall inks     

《Journal of Cultural Heritage》2014,15(4):373-381

  相似文献   

大强度游泳训练对少年运动员血清sIL-2R水平的影响   总被引：5，自引：0，他引：5  

徐秀英  李骁君  张文峰  朱琳娜 《山东体育学院学报》2000,16(3):23-26

对20名少年业体游泳运动员大强度训练前后血清可溶性白细胞介素2受体(sIL-2R)进行了测试,并同步测试了T细胞亚群、NK细胞及血乳酸水平。实验结果表明：训练后比安静时sIL-2R明显下降,由此,因IL-2介导的T细胞亚群、NK细胞的活化程度受到明显的抑制,使免疫系统机能受到影响。因此,应强调少年运动员的科学训练,减少易感病症的发生。  相似文献   

利用前馈神经网络的非线性时变系统的辩识     

王正欧  赵长海 《天津大学学报(英文版)》2000,6(1)

提出一种将前馈神经网络用于非线性时变系统辩识的学习算法 ,其要点是把网络权值看作时变系统的一个状态 ,用卡尔曼滤波估计此状态 ,于是网络实现了非线性和时变的映射 .文中推导了该算法 ,仿真结果证实了它的有效性  相似文献   

固定pH滴定法测定混合食用色素     

徐刚 《商丘师范学院学报》1999,(6)

传统的滴定分析方法以当量定律为依据,必须确定化学计量点．对于离解常数小于１０ － ７ 的极弱酸碱,由于化学计量点ｐＨ 没有突变,传统的确定化学计量点的方法失效,无法在水溶液中直接滴定．本文提出的固定ｐＨ 滴定法是以水溶液中弱酸（ 碱） 各种存在形式的分布系数（ 数值上等于中和百分数） 在ｐＨ 值固定时是常数为依据的新型滴定分析方法,不以当量定律为依据,不需要确定化学计量点,不要求滴定反应定量完成,也不需要已知滴定剂浓度．只要温度、离子强度及滴定剂浓度不变,滴定到达某一固定ｐＨ 值时,滴定剂消耗体积与弱酸（ 碱） 物质的量呈正比．当溶液中存在多种弱酸（ 碱） 时,滴定到达某一ｐＨ 值,滴定剂消耗体积与各弱酸（ 碱） 物质的量之总和呈正比．因此,只需测定滴定至多个ｐＨ 值时所消耗的滴定剂体积,就可求出各组分含量．将本法应用于弱酸性合成食用色素胭脂红和柠檬黄混合物的同时测定,结果满意,回收率９９２ ％ ～１０２５ ％ ．还测定了的酸离解常数,其ｐ Ｋａ 分别为１１１９ 和９４３ ．初步解释了取代基对其酸碱性的影响  相似文献   

评价学习成绩相对有效性的数学模型   总被引：1，自引：0，他引：1  

程利军 《滨州学院学报》1999,(4)

利用数据包络分析 (DEA)方法 ,给出了评价学生学习成绩相对有效性的数学模型 ,这一模型兼顾入学时成绩和入学后成绩  相似文献