Relationships between changes of kernel nutritive components and seed vigor during development stages of F1 seeds of sh 2 sweet corn

The changes of kernel nutritive components and seed vigor in F₁ seeds of sh ₂ sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages. Project supported by the National Natural Science Foundation of China (No. 30370911) and Education Department of Zhejiang Province, China (No. 20070147)     

唯物史观与共产主义、社会主义价值观的统一——《共产党宣言》与邓小平理论的一个共同特征

唯物史观与共产主义、社会主义价值观的统一 ,是马克思主义的一个基本特征 ,也是社会主义由空想变为科学的前提条件。《共产党宣言》作为一部阐述阶级斗争学说的经典著作 ,体现了唯物史观与共产主义价值观具体的历史的统一 ;它作为科学社会主义理论 ,把共产主义价值观奠定在唯物史观的基础上。邓小平理论在社会主义本质问题上 ,把唯物史观与社会主义价值观融为一体 ;在怎样建设社会主义问题上 ,体现了唯物史观与社会主义价值观相统一的原则 ,也反映了唯物史观与社会主义价值观具体的历史的统一     

桩端后压浆灌注桩桩基动力的检测与评定

桩端后压浆灌注桩桩基动力的检测是评定桩基质量的唯一方法。本文通过工程实例介绍桩基后压浆灌注桩桩基动力检测的基本方法及评定结果。     

高层建筑结构转换层大梁的施工

本文根据现场施工实践,介绍了转换层钢筋混凝土梁的模板支撑、钢筋制作、安装和混凝土浇筑等主要施工技术过程.     

实施软件复用时应注意的几个问题

软件复用时软件工程研究的一类重要问题,本文讨论了软件复用的重要,指出并分析了实施软件复用时应注意的几个方面的问题。     

理性具体与数学差生

本文通过对数学结论的理性具体的探讨，从认识论的角度审视了数学差生形成的一个重要原因。     

肝胆管结石合并重症急性胆管炎应用PTCD的临床价值

本文阐述了重症急性胆管炎(AOSC)应用 PTOD 的临床价值。AOSC 病人,病情均急、重、危。急诊手术危险性大,而保守治疗又难挽救病人生命,终因导致中毒性休克,死亡较多。为此,我们自1984年开始,对13例 AOSC 病人应用经皮肝穿胆道造影及引流术(PTCD)以缓解病情,改善了病人全身情况。然后,择期施行 Roux—Y 型胆肠吻合术。临床观察疗效满。文内对 PTCD 的操作方法及优缺点进行了介绍。     

代位执行的性质研究

代位执行作为财产执行制度之一，对保护债权人的利益及稳定民事法律关系有重要意义。尽管这一制度源远流长，在我国也已确立了十年，但对代位执行的性质学界大都附带提出，很少充分探讨，以致于对该问题的理解仍然模糊不清，故导致其在立法体例上没有一个准确的定位，影响了代位执行有效地实施。本文从学界的几种相关观点入手，层层深入，得出代位执行应有的性质，以期在立法体例上对代位执行有一个正确的定价。     

基于. NET 的博客系统的设计与实现

随着网络技术的快速发展和网络的普及应用, 作为Web210 的重要组成部分的博客, 越来越受到各界的广泛关注与青睐, 各种博客也应运而生, 博客技术、开发模式的运用也有多种。本文提出了基于. NET 的三层开发模式, 同时对系统的功能模块设计及系统的实现过程进行了详细的介绍。为了便于被搜索引擎搜索, 还应用了一种静态页面生成技术。系统采用C # 语言和组件对象模型开发形式, 提高系统开发效率、安全性、可靠性及浏览速度。     

“Accepting Emotional Complexity”: A Socio-Constructivist Perspective on the Role of Emotions in the Mathematics Classroom

A socio-constructivist account of learning and emotions stresses the situatedness of every learning activity and points to the close interactions between cognitive, conative and affective factors in students’ learning and problem solving. Emotions are perceived as being constituted by the dynamic interplay of cognitive, physiological, and motivational processes in a specific context. Understanding the role of emotions in the mathematics classroom then implies understanding the nature of these situated processes and the way they relate to students’ problem-solving behaviour. We will present data from a multiple-case study of 16 students out of 4 different junior high classes that aimed to investigate students’ emotional processes when solving a mathematical problem in their classrooms. After identifying the different emotions and analyzing their relations to motivational and cognitive processes, the relation with students’ mathematics-related beliefs will be examined. We will specifically use Frank’s case to illustrate how the use of a thoughtful combination of a variety of different research instruments enabled us to gather insightful data on the role of emotions in mathematical problem solving.