根条件

In chapter 5,we introduce the De Morgan algebra of metric and investigate the pseudo-metric Uniformity and the pseudo-metric topology and the separation axioms in De Morganalgebra of metric.We establish the Baire category theorem and the Banach contraction theo-rem,the Edelstein contraction theorem and other fixed quasi-atom theorems in De Morganalgebra of metric.In final,we give a sufficient condition for the metrization of a De Morganalgebra of topology.

在第五章里，我们地德摩根代数中引进了伪度量，探讨了伪度量一致和伪度量拓扑以及德摩根度量代数的分离公理，得到了Baire范畴定理、Banach收缩定理、Edelstein收缩定理以及其它不动拟原子定理，最后给出一个德摩根拓扑代数可度量化的充分条件。

Study on the rapid Propagation Technique of Lycoris. Herb and get follow results: In the period found of axenic clone 0.1%HgCl2 is the best disinfector to deal with the Lycoris" bulb ,as to neat part, such as root, leave, and bulbil, is fit to use 0.1%HgCl2 antisepsis 7min. And found the best effect is the bulb scale with base. Root, leaf and bulb scale without base all were not inducement adventitious buds. Different position of bulb had different culture effect. 3-15 of middle part of bulb can be induced most adventitious buds but inner and outer of least it. Incised the bulb with three types (pieces of eight, pieces of six, piece of four), and found the type of pieces of six is best to Lycoris mass production. L.sprengeri is fit MS+BA5mg/l+NAA0.1mg/l and L.squamigera is fit MS+BA5mg/l+NAA0.5mg/l, but the medium fit to culture L.longituba haven"t be found.In the period of Subculture-Found of mass production, the most multiplication of adventitious buds in MS+BA5mg/l+NAA0.5mg/l during subculture of L.sprengeri, L.squamigera.

石蒜属植物快速繁殖技术研究中，在无菌无性系建立阶段：鳞茎以0.1％HgCl_2消毒10-12分钟效果最好，而叶、根尖、鳞芽等较干净部位选用0.1％HgCl_2消毒7分钟；用三种石蒜属植物的叶片、根尖、鳞芽及带基盘与不带基盘鳞片进行培养，以带基盘鳞片诱导分化效果最理想，鳞芽易培养出芽，但数量有限，而叶片、根尖与不带基盘鳞片均未诱导分化；带基盘鳞片为石蒜属植物快速繁殖最佳外植体，以鳞茎中部3-15层芽诱导率高，较外层稍次之，内部鳞片诱导率最低；选用八等分法、六等分法、四等分法切割鳞茎，六等分法综合效果最好；每外植体带三鳞片培养最为适宜；三种石蒜属植物各自适合的培养基成分不同，换锦花在MS+BA5mg／l+NAA0.1mg／l中培养效果最好，夏水仙为MS+BA5mg／l+NAA0.5mg／l，而白花长筒石蒜在各培养基组合中培养效果均不理想，其适合的培养条件有待于进一步研究。

4DRG was co-culture with sciatic nerve segment in 10鸖 DMEM;the axons were longer and surround the sciatic nerve segment which was regard as anew evidence for chemotropism.

结果：(1)在无血清条件下单独培养的DRG，背根神经节的轴突数目众多，外形纤细弯曲，不成束，并且施万细胞和成纤维细胞稀少，所以可以排除两者对轴突生长的影响，为观察来源于变性坐骨神经段的可溶性因子对轴突生长的作用提供了有利条件；(2)在无血清条件下DRG和变性坐骨神经段联合培养，①先单独培养DRG，4天后待神经元轴突长出，再与坐骨神经段联合培养，观察到神经元的轴突数目减少，外形挺直，部分轴突之间相互粘附成束；②变性坐骨神经段和DRG同时联合培养，神经元的轴突数目明显减少，外形粗壮，轴突之间相互粘附成束；(3)有血清条件下单独培养DRG，轴突数目较多，外形挺直，长短不一，部分神经元的轴突之间相互粘附，施万细胞和成纤维细胞数目众多，观察到的轴突生长情况受到施万细胞和成纤维细胞的直接或者间接的影响。

The chicon quality after forcing was low and the yield, size, weight and density of chicon was small. In this paper, the changes of main chemical composition of chicory root during vernalization and storage at different temperature, the storage quality of chicory root at different temperature and the factors of affecting forcing were studied.

本试验以北京市农林科学院蔬菜研究中心提供的菊苣为试材，分别研究了菊苣根中主要化学成分在春化期间和不同贮藏温度下的变化情况，不同低温条件下菊苣根的贮藏品质以及影响菊苣软化的一些因素等进行了探讨，以期为今后菊苣根的贮藏和软化技术研究提供一些参考。

Experiments were carried out to study the effects of P sources on phosphatase activity of rhizosphere and mycorrhizosphere of red clover inoculated with Glomus mosseae , and cultural system with three compartments was applied.

以红三叶草为研究对象，利用三室培养系统，在接种菌根真菌的条件下研究了不同磷源对根际和菌根际磷酸酶活性的影响。

Carex species often lack mycorrhizae, but under conditions of low phosphorus availability many species facultatively form dauciform root structures that are implicated in phosphorus uptake.

苔草植物经常不形成菌根，但在低磷条件下许多苔草植物特有地形成特殊根结构—胡萝卜状根，这意味着该类根具有吸收磷的能力。

Methods The conditions of solvent extracting active ingredient from pueraria lobata were optimized,and evaluating indIcators were contents of puerarin,lead and mercury, which were determined by high performance liquid chromatography and atomic fluorescence spectrometry.

方法采用高效液相色谱法和原子荧光光谱法测定葛根提取液中葛根素和铅、汞元素的含量，以葛根素和铅、汞元素的含量为评价指标，对影响溶剂回流提取葛根有效成分的条件进行优化。

Methods 14 teeth with iatrogenic root canal perforation were selected. The root canals were shaped and cleaned, and then obturated with gutta- percha after MTA was used to repair the perforation in the condition with any blood and moisture.

选取医源性因素造成的根管侧壁穿孔患牙14颗，彻底清理根管并预备根管，在止血隔湿的条件下以MTA 即刻修补根管侧壁穿孔。

The influencing tendency,principle of action and the extent of influence of eight factors effecting on the undercutting of external toothing involute columnar gear are discussed.

讨论了外啮合渐开线圆柱齿轮根切的全部共8个影响因素的影响倾向、作用原理和影响程度，给出了一个新参数——根切系数，用以衡量根切倾向的大小，使对渐开线齿轮根切的产生条件的认识更为全面。

The TPH pollutants of non-rhizosphere decompositted differently in environment with plant. The gradation rate of low concentrate pollutants was much higher than that of high pollutants level. The decomposition rate of TPH pollutants in rhizosphere was higher than that in non-rhizosphere, and the rhizosphere effect deceased with degree of pollution.

在有植物存在的条件下，非根际土壤石油污染物降解的变化表现为：在低污染水平，污染物的降解率明显高于高污染水平，根际土壤的降解率高于非根际土壤的降解率，且随着污染水平的提高，植物的根际效应减弱。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。