不同品种黄瓜幼苗光合机构对盐胁迫的响应

研究了盐胁迫(0、25、50mmol／L)对不同品种黄瓜幼苗生长、光合作用和叶绿素荧光的影响．结果表明，盐胁迫，尤其是高浓度NaCl(50mmol／L)的胁迫，显著降低黄瓜幼苗生长量、叶绿素含量、光系统Ⅱ光合电子传递量子效率(φPSⅡ)、净光合速率(Pn)、气孔导度(Gs)以及气孔限制值(Ls)，同时显著提高叶片相对电导率、丙二醛、脯氨酸含量和细胞间CO2浓度(Ci)，光系统Ⅱ的光化学效率(Fv／Fm)变化不大．盐胁迫对耐盐黄瓜‘津研4号’幼苗生长的影响小于盐敏感黄瓜‘津绿4号’，这可能与耐盐黄瓜在盐胁迫下较高的净光合速率、光系统Ⅱ光合电子传递量子效率和较低的丙二醛(MDA)含量、相对电导率有关。     

非协调轴对称杂交应力元单元刚度矩阵的准确建立

给出新型三类用理性杂交模式、根据一种修正的Ｈｅｌｌｉｎｇｅｒ－Ｒｅｉｓｓｎｅｒ原理、建立高精度非协调轴对称实体旋转有限元时，其单元刚度矩阵的准确计算式。     

A Qualitative Analysis of the Portrayal of Young People and Psychosis in Australian News Reports

ABSTRACT

News media plays an influential role in shaping society’s understanding of mental illness and can promote perspectives ranging from those that promote help-seeking behaviour to stigmatised associations with attributes such as danger and violence. Stigma has been found to have significant negative impacts on people with psychosis. No existing studies have explored how young people with psychosis are represented in newspapers. Targeting this gap, this study analysed news articles relating to youth psychosis to determine the types of discourses used. We searched the ProQuest Australia and New Zealand Newsstream database (2011-2016) for Australian newspaper articles related to young people and psychosis. Qualitative analysis was used to identify content and these were arranged into key themes. The recurring themes evident in the 27 articles linked youth psychosis to illicit drug use, violence and professional infighting about treatment options, and thus promoted significantly stigmatised perspectives of youth psychosis. Acknowledgement of these stigmatised discourses is important for encouraging responsible media reporting and for understanding the social messages impacting on treatment and help-seeking by young people. We discuss the conflicted role of journalists in presenting information about mental illness and recommend development of a more solutions-focused approach to reporting in this area.     

二语习得中"心理词典"的建构及策略研究

心理词典的概念自20世纪60年代由Treisman提出后,90年代后已被广泛地运用于二语习得研究中.本文围绕二语习得中双语心理词典,对如何促进二语习得中"心理词典"的建构及如何形成策略进行了研究和评述,以期对实际的学习和教学提供帮助.     

“三位一体”大学生心理危机干预体系初探

大学生心理危机干预是新时期高校思想政治教育工作的一个重要组成部分。结合近年来国内外危机干预的理论与实践,提出"学校-院(系)-班级、公寓"三位一体的大学生心理危机干预体系,并探索通过三级危机干预中心的运作实施大学生心理危机干预,即危机的预防性干预、危机的咨询与治疗性干预和危机的应急干预。     

Effects of osmotic stress on antioxidant enzymes activities in leaf discs of P<Subscript>SAG12</Subscript>-<Emphasis Type="Italic">IPT</Emphasis> modified gerbera

Leaf senescence is often caused by water deficit and the chimeric gene PSA612-1PT is an auto-regulated gene delaying leaf senescence. Using in vitro leaf discs culture system, the changes of contents of chlorophylls, carotenoids, soluble protein and thiobarbituric acid reactive substance （TBARS） and antioxidant enzymes activities were investigated during leaf senescence of PSA612-1PT modified gerbera induced by osmotic stress compared with the control plant （wild type）. Leaf discs were incubated in 20%, 40% （w/v） polyethylene glycol （PEG） 6 000 nutrient solution for 20 h under continuous light [ 130 μmol/（m^2·s）]. The results showed that the contents of chlorophylls, carotenoids and soluble protein were decreased by osmotic stress with the decrease being more pronounced at 40% PEG, but that, at the same PEG concentration the decrease in the transgenic plants was significantly lower than that in the control plant. The activities of superoxide dismutase （SOD）, catalases （CAT）, ascorbate peroxidase （APX）, guaiacol peroxidase （GPX） and dehydroascorbate reductase （DHAR） were stimulated by PEG treatment. However, the increases were higher in PSA612-IPT transgenic plants than in the control plants, particularly at 40% PEG treatment. Lipid peroxidation （TBARS content） was increased by PEG treatment with the increase being much lower in transgenic plant than in the control plant. It could be concluded that the increases in the activities ofantioxidant enzymes including SOD, CAT, APX, GPX and DHAR were responsible for the delay of leaf senescence induced by osmotic stress.     

碱胁迫对叶片延迟发光的实验研究

选用绿宝石喜林芧叶片为材料,用BPCL型微弱发光测量仪测量了叶片经高浓度NaOH溶液处理后的延迟发光情况。结果发现:同一个叶片随着处理时间的延长,其延迟发光最初值和最后100s的光子数都先有一个小幅度的上升,然后又迅速下降;不同的叶片在相同的处理时间下,随着NaOH质量分数的增加,延迟发光最初值和最后100s的光子数都呈现上升的趋势,NaOH质量分数越大,上升得越快,随着处理时间的延长,上升的趋势变得越来越缓,最后各曲线越来越接近,且趋于平稳。整个实验表明,延迟发光可以规律性地反应碱胁迫对叶片的伤害程度,这为生物物理方法测量外界胁迫对叶片的影响提供了参考。     

教师压力管理的“员工援助计划”模式探讨

文章借鉴近年国内启动的员工援助计划（EAP）,考虑教师群体和教育工作的特殊性,与中国现行的教育体制和中国文化背景相结合,构建中国式教师压力管理的EAP模式,提出EAP实施的方案和应关注的问题。     

基于ANSYS的平面应力分析

利用ANSYS软件中的平面应力静力分析功能,采用ANSYS的APDL语言完成了平面应力的内力分析计算.其方法可用于解决其他类型平面应力问题.     

高职单招新生心理健康状况调查分析

采用症状自评量表（SCL-90）对1151名高职单招新生进行调查,结果发现：高职单招新生中有10.25%的学生被检出有明显心理问题;高职单招新生在SCL-90多数因子上高于全国常模,其中在强迫、焦虑、恐怖和精神病性方面显著高于全国常模;高职单招新生中文、理科生,男、女生,来自城镇和农村的学生之间在SCL-90的总体上有显著差异,独生子女与非独生子女之间没显著差异;高职单招新生与当年普通高考录取新生在SCL—90总体上差异不显著,仅在躯体化和敌对两个因子均分上极显著地高于当年普通高考录取新生。