在高校辅导员工作中贯彻落实"八荣八耻"的社会主义荣辱观

贯彻落实"八荣八耻"的社会主义荣辱观,为学校思想政治工作和德育工作指明了方向,文章初步探讨在高校辅导员工作中贯彻落实"八荣八耻"为主要内容的社会主义荣辱观的必要性和途径。     

三元固体配合物[Sm（C9H6NO）2（C6H5COO）]·H2O的标准摩尔生成焓

按照文献合成了三元固体配合物[Sm（C9H6NO）2（C6H5COO）]·H2O通过红外光谱进行表征．利用Hess定理设计了配位反应的热化学循环,并在常压298．15K下,分别测定了六水氯化钐、苯甲酸、8-羟基喹啉以及配合物在混合溶剂中的溶解焓,根据热化学原理求出了298．15K时,配位反应的反应焓;并进一步计算出了[Sm（C9H6NO）2（C6H5COO）]·H2O三元固体配合物的标准摩尔生成焓．     

不同区域脑组织对运动诱导氧化应激和DNA损伤的反应

目的:观察8周规律游泳运动对脑组织不同区域的氧化应激体系和DNA损伤的影响。方法:符合实验条件的24只雄性SD大鼠随机分为两组:安静组、递增负荷8周规律游泳组。采用免疫组化染色和生物化学检测方法,观察8周规律游泳运动对脑组织不同区域丙二醛(MDA)含量和谷胱甘肽过氧化物酶(GSH-PX)活性以及8-羟基-2’-脱氧鸟苷(8-OHdG)表达情况的影响。结果:8周规律游泳可以使大鼠海马组织的GSH-PX活性增加,同时MDA含量降低(p<0.05);但皮层GSH-PX活性及MDA含量与安静组相比无统计学意义;DNA损伤的产物8-OHdG表达在皮层和海马组织中与安静组之间无差别。结论:规律游泳运动可增加海马组织GSH-PX活性,对皮层GSH-PX活性无影响;运动对皮层和海马组织GSH-PX活性的影响不同,但并没有增加皮层的DNA损伤,可能是氧化应激过程中不同脑区的调节机制不同。     

185nm紫外光/氧化协同降解水体中微量三氯甲烷的研究

文章研究了185nm紫外光/氧化协同降解水体中微量三氯甲烷的降解情况,考察了溶液浓度、光解时间、溶液pH值以及加入氧化剂等对降解三氯甲烷的影响,研究结果表明,CHCl3的脱氯基本是由185nm紫外光引起;其脱氯率几乎不受pH值的影响;在近中性条件下,5mg.L-1的三氯甲烷水溶液的CODMn去除率、脱氯率均与光解时间呈指数上升;光解5min后,CODMn去除率可达50%左右,脱氯率则小于30%;CHCl3的解离主要是185nm光子的作用,而与其它氧化性物质无关。     

ISSR markers based on GA and AG repeats reveal genetic relationship among rice varieties tolerant to drought, flood, or salinity

Drought,flood,salinity,or a combination of these limits rice production.Several rice varieties are well known for their tolerance to specific abiotic stresses.We determined genetic relationship among 12 rice varieties including 9 tolerant to drought,flood,or salinity using inter-simple sequence repeat (ISSR) markers.Based on all markers,the nine tolerant varieties formed one cluster distinct from the cluster of three control varieties.The salt-tolerant varieties were closest to two flood-tolerant varieties,and together they were distinct from the drought-tolerant varieties.(GA)8 YG was the most informative primer,showing the highest polymorphic information content (PIC) and resolving power (Rp).The drought-,flood-,and salt-tolerant varieties grouped in three distinct clusters within the group of tolerant varieties,when (GA)8 YG was used.Sabita was the only exception.The two aus varieties,Nagina22 and FR13A,were separated and grouped with the drought-and flood-tolerant varieties,respectively,but they were together in dendrograms based on other primers.The results show that ISSR markers associated with (GA)8 YG delineated the three groups of stress-tolerant varieties from each other and can be used to identify genes/new alleles associated with the three abiotic stresses in rice germplasm.     

用友ERP-U8院校版安装问题研究

针对学生在安装用友ERP-U8管理软件中存在的问题,结合实际应用经验对安装ERP-U8所需的操作系统和数据库的版本兼容性进行了分析,并给出了建设性的软件安装方案。     

Teachers’ perceptions of assessments of their mathematical knowledge in a professional development course

The purpose of the project reported in this article was to evaluate how assessing teachers’ mathematical knowledge within a professional development course impacted from the teachers’ perspective their learning and their experience with the course. The professional development course consisted of a 2-week summer institute and the content focus was geometry. We had decided to assess the mathematical learning of the teachers during this professional development course for various accountability reasons, but were concerned about possible negative by-products of this decision on the teachers and their participation. Thus, we worked to design assessment in ways that we hoped would minimize negative impacts and maintain a supportive learning environment. In addition, we undertook this evaluation to examine the impacts of the assessment, which included homework, quizzes, various projects, and an examination for program evaluation. Seventeen grade 5–9 teachers enrolled in the course participated in the study by completing written reflections and by describing their experiences in interviews. We learned that while our original intent was “to do no harm,” the teachers reported that their learning was enhanced by the assessment. The article concludes by describing the various properties of the assessments that the teachers identified as contributing to their learning of the geometry content, many of which align with current recommendations for assessing and evaluating grade K-16 mathematics students.

四种预处理因素的凝缩和抑制效应

比较研究了秋水仙素、8—羟基喹啉、对二氯苯、低温四种预处理因素对蚕豆根尖细胞染色体的凝缩效应和对有丝分裂的抑制效应。结果表明:(1)四种预处理因素积累中期细胞和使染色体凝缩的效应大小是:秋水仙素>低温>>对二氯苯>>8—羟墓喹啉。(2)秋水仙素对染色体的凝缩具有长效性,其它三种因素则是短效的。(3)8—羟基喹啉强烈抑制有丝分裂和细胞生长,并且难以恢复,使根尖细胞受到严重毒害。秋水仙素先是使有丝分裂受到抑制,之后又刺激有丝分裂。低温、对二氯苯也能抑制有丝分裂,但恢复较快。     

荧光光谱滴定法测定修饰环糊精与金刚烷衍生物的稳定常数

8-羟基喹啉修饰环糊精可发射8-羟基喹啉基团的荧光,环糊精和8-羟基喹啉基团存在自包结现象,当该修饰环糊精加入金刚烷衍生物后,金刚烷衍生物和修饰环糊精形成更稳定的包合物,可以把环糊精自包结的8-羟基喹啉基团顶出环糊精空腔,从而引起饰修环糊精荧光强度的变化。通过测定荧光强度的变化值,测得修饰环糊精与金刚烷衍生物配合物的稳定常数为LogKs=4.015。     

两种诱变剂对蚕豆根尖细胞遗传毒理学研究

以蚕豆根尖为材料，用微核实验和染色体畸变试验方法，研究不同浓度的8-羟基喹啉与对苯二酚对蚕豆根尖细胞的有丝分裂指数、微核率和染色体畸变率的影响．结果表明：不同浓度的8-羟基喹啉与对苯二酚使蚕豆根尖细胞有丝分裂指数明显增加，诱发较高频率的微核，在一定浓度范围内，其微核率随处理浓度的升高而升高，但随着诱变剂浓度的升高而呈下降趋势．两种诱变剂还能诱导染色体产生多种类型的畸变，染色体畸变率随着处理浓度的增加而升高，随着浓度的进一步增加却呈现下降趋势，但均明显高于对照组．