THE INDUSTRIAL ORGANIZATIONS AND THE L-S-BUSINESS STRATEGIES

This papar presents an evolution model in business behaviors-the L-S Business Strategies,gives some examples and predictions which support these strategies,and analyzes the relationship between the industrial organizations in China and the L-S Business strategies.     

THE MECHANICAL MODEL ON IMPACT SYSTEM AND ITS PARAMETER IDENTIFICATION

A new mechanical model on impact system with non-linear element is presented and the practical method for measuring and identifying the parameters is also studied. The results of the experimental analysis and theoretical calculations are satistactory. And we hope to provide more acurate theorecical model for the study and design of impact dampers.     

THE CHANGE LAW OF THE COAL''S STRUCTURE PARAMETER WITH INCREASING THE TEMPERATURE

In this paper,we have studied the change law of the structural parameter of coal in Nan Tong Coal Mine with the increasing the temperature. At the same time, we explore the cause of the changes with the electron microscope and of infrared spectrum.     

黄淮夏大豆形态性状的遗传研究

本文以黄淮地区6个夏大豆品种(系)通过双列杂交保留下来的F_3代材料,研究大豆6个形态性状的遗传特性.结果表明,株高、有效分枝数、主茎节数、主茎荚丛数和茎粗5个性状均符合加性—显性模型.而底荚高则存在非等位基因之间的互作效应.株高、有效分枝数、主茎节数和主茎荚丛数为部分显性,茎粗存在超显性现象.主茎节数和主茎荚丛数可能有相似的遗传特点.豫豆8号大豆带有较多的控制株高的显性基因,油84-30大豆带有较多的控制分枝和茎粗的显性基因,而尖顶大白角大豆控制主茎节数和美丛数的显性基因较多.     

葡萄组培苗瓶外生根技术研究

采用不同种类和浓度的生长素诱导葡萄组培苗瓶外生根，并观察组培苗在不同处理基质、不同的温度、不同的生理年龄条件下生根的效果。通过优化技术参数，建立了葡萄组培苗瓶接生根的技术优化体系，结果表明，用浓度为0.3mg/L的IBA浸蘸处理的插条，在温度为27~29℃的环境条件下在基质珍珠岩上培养，瓶苗茎段的生根率可达85.5 %，移栽后苗木的成活率达98 %，相对于其他方法有了较大的提高。该技术的建立有助于实现葡萄工厂化育苗技术的商业化扩大。     

原生质体载体技术在马铃薯育种中的应用

综述了原生质体载体技术在育种中的应用:体细胞杂交、以原生质体为受体细胞的DNA直接导入转化、体细胞无性系变异、胁迫耐受系的选择,同时针对马铃薯的生物学特性、育种现状及其原生质体方面的研究现状,提出利用原生质体载体技术进行马铃薯育种的优势和切实可行性。     

半夏小块茎的形态发生及人工种子制作

离体培养中，经过小块茎发生途径从半夏叶柄诱导了完整植株。用实体解剖、连续切片和三维结构重组等方法观察分析得出：小块茎顶端的叶原基由于不对称生长逐渐将顶端分生组织复盖，随后叶原基的尖端和两侧生长延缓，生长中心转移到背轴面中央，结果导致叶原基长帽状结构。不同发育程度的雏叶和叶原基总是相互叠在一起顶端分生组织复盖于下面。小块茎枯端形成芽的同时，在顶芽附近分化根。     

A STUDY ON FRACTURE MECHANICS OF BRITTLE MATERIAL WITH PER-CRACKS

In this paper the fracture process of specimen,with single crack, double cracks and triple cracks is observed and analysed. The experimental results show that the fracture process of specimen is different because of the differention of the number, the distance and the type of array of cracks. And the fracture propagation of specimen with triple cracks and double cracks is foundmentally the same.     

小麦异源细胞质对主要病害抗性影响的初步研究

在大田自然发病和人工诱发条件下,研究了小麦异源细胞质对条锈、叶锈、秆锈、白粉和赤霉5种主要小麦病害抗性的影响。结果表明在同核条件下,不同异源细胞质对同一病害抗(感)性的影响不同,同一种细胞质对不同病害抗(感)性的影响也不完全相同;并且在不同地区试验的结果有时也有差异。根据初步研究结果,无芒山羊草、拟斯卑尔脱山