不同Ca2+水平对三角帆蚌养殖水体藻类和细菌总量控制的研究

研究了不同Ca2+水平的水体系统中藻类增长特性,三角帆蚌滤食对于藻类的影响,藻类增长所导致的细菌增长对三角帆蚌所产生的危害.实验设计了五组Ca2+浓度水平(45.50mg/L、48.65mg/L、58.65mg/L、88.65mg/L、125.15mg/L),通过调节使pH与Ca2+浓度相对应,实验结果发现[Ca2+4]=88.65mg/L,pH=8.05的条件下,藻类生长最佳,而细菌总量则维持在低水平,同时对三角帆蚌生长较为有利.试验的应用价值有利于三角帆蚌快速生长,减少三角帆蚌病害发生和死亡.     

内蒙古包头市突厥鲁尼文查干敖包铭文考释——兼论后突厥汗国“黑沙南庭”之所在

在内蒙古包头市达尔罕茂明安联合旗发现的突厥鲁尼文查干敖包铭文,是内蒙古迄今发现的唯一的突厥鲁尼文文献史料.根据查干敖包铭文的发现地点及其印记,可推断该铭文应属于后突厥汗国可汗家族阿史那氏的旁系家族,纪年约在7世纪末至8世纪初,极有可能为迄今发现的最早的突厥鲁尼文文献史料.结合汉籍史料和笔者的田野调查,可推断后突厥汗国的“黑沙南庭”即为达茂旗一带的草原.而查干敖包铭文,则印证笔者有关“黑沙南庭”的这一推论不误.     

The experiences of pregnant women during the COVID-19 pandemic in Turkey: A qualitative study

BackgroundDue to spread and impact of COVID-19 in the world and Turkey lead to fear, stress and anxiety in individuals. This trend is increasing more especially in pregnant women at risk as they are concerned about the safety of themselves and the fetus.AimIn our study, concerns, problems and attitudes of pregnant women related to diseases in the pandemic process will be determined by detailed discussions based on their individual experience, and by increasing the awareness of midwives and nurses about what pregnant women experience in this process.MethodsContent analysis is used as qualitative study pattern. Due to the social isolation rules during the coronavirus pandemic, interviews with pregnant women were planned to be held via mobile phone. The study was completed with 15 pregnant women.ResultsAs a result of the content analysis of the interviews, 3 main themes and 11 sub-themes were identified. The identified themes were as following: (1) not understanding the seriousness and fear of the unknown, (2) coronavirus pandemic and disruption of the routine prenatal care (3) disrupted routines and social lives. Each theme was necessarily discussed separately.ConclusionThe results of the study show that coronavirus pandemic has a significant potential for creating anxiety, adversity and fear, which has a negative emotional effect on pregnant people. It will be useful to provide awareness for midwives and nurses not only about the physical health of pregnant women, but also their mental health, and to cooperate with mental health experts if necessary.     

Harnessing the reliability of outcome measures

A method is presented for engineering the necessary levels of measurement reliability for evaluating ongoing programs. Two studies of levels of client functioning at a community mental health center (CMHC), in which an outcome measure, the Global Assessment Scale (GAS), did not perform as expected, drew attention to the need for better control of outcome measure reliabilities. Drawing from generalizability theory, a study was conducted of three sources of GAS score variance — clients, raters, and training in the use of the scale. Several estimates of reliability (ERs) were developed, depending on the manner in which the GAS ratings were, or would be, obtained in the CMHC. The differences among these ERs clarified why the GAS had lower reliability when used in our setting. Finally, two hypothetical examples are described to illustrate the utility of applying generalizability theory to achieve higher reliabilities for outcome measures.     

悬浮液进样火焰原子吸收光谱法测定芦荟内凝胶中钙、镁含量

探讨悬浮液进样火焰原子吸收光谱法测定芦荟内凝胶中钙、镁含量的方法．该方法的检出限量为：１．５２×１０２％ｕｇ／ｍｌ．（钙）,９．２０×１０４％ｕｇ／ｍｌ（镁）;平均加标回收率：钙为１０１．９％,镁为９６．４３％;相对标准偏差钙为２．５％镁为２．９％本法与消化后液体进样原子吸收光谱法测定相比,污染小、简便、省时．     

基于伦理关注的高校思想政治教育实效性研究

高校思想政治教育的实效性依赖于对学生个性发展的认识和关注,促进学生全面健康发展是高校思想政治教育的最终目的,本文通过对目前高校思想政治教育现状的分析,指出高校思想政治教育应适应新时代的要求,从关注人性需求的伦理角度出发更多体现尊重个性、人性,在伦理关注的基础上探寻有效的思想政治教育新思路、新方法。     

Ca2+促进丝瓜离体生根（英）

Ca2+信使系统是植物体内重要的信号通路,它将许多细胞外信号转化为细胞内的信号以影响许多蛋白激酶活性,从而引起植物生长发育的多种反应.在正常Ca2+浓度下,仅激素处理不能生根的丝瓜外植体,处以不同Ca2+浓度处理时,随Ca2+浓度升高,外植体生根数明显加快并增多,且有少量植株叶腋处异化生根,在一定程度上改变了腋芽的发育方向,这说明Ca2+改变了卷须芽或花芽的发育方向,使其发育为根.但Ca2+超过一定浓度后会影响外植体的正常营养生长.     

"三贴近"传统的历史演进

"三贴近"既是党在新的历史时期提出的宣传思想战线的指导原则,也是党的新闻宣传工作的优良传统。在八十多年的发展历程中,我党先后提出了新闻宣传通俗化群众化思想,新闻宣传大众化思想,全党办报、群众办报思想,联系实际、联系群众、开展批评和自我批评的思想,以及贴近实际、贴近生活、贴近群众的思想。这些产生于不同历史时期的指导思想构成了"三贴近"传统的演变史。回顾和梳理"三贴近"传统的发展脉络,总结党在新闻宣传工作中的历史经验,将有利于我们对"三贴近"原则的深入理解和贯彻落实。     

放射性核素~(45)Ca在螺蛳中积累和分布的研究

放射性核素的衰变能放出α、β或γ射线,因此可以"示踪"该元素的存在,方法十分灵敏和简便。在环境科学领域,应用放射性核素示踪技术,是研究污染物在环境中迁移、转化、积累和分布的重要方法。本文研究了放射性核素45Ca在螺蛳中的积累和分布,实验表明:螺蛳的各部分对45Ca有不同的富集能力,其富集能力顺序大致如下:骨骼肌肉消化道,并随时间的变化而变化。     

Ca~(2 )和CaM在被子植物双受精中的作用

:本文从 Ca2 和 Ca M在花粉萌发、花粉管生长、生殖核分裂、助细胞退化及胚胎发育中的作用等几方面进行了综述