依据性状

Result:The medicinal properties,microscopic characteristics and paper chromatographyanalysis of the stem and cortex were described and physicochemically idendified,so as to proide the morphological and histological standards of quality control.

结果：对药材性状、显微特征进行了观察描述及理化鉴别和纸色谱分析，为本品生药质量控制提出了形态组织学的依据。

The result of cluster analysis is similar for main wood nature properties and phenotypic properties in 20 natural populations of Picea asperata.

依据管胞和木材基本密度性状的变异特征，可进行优良纸浆材群体的初步选择和群体聚类分析。

The original plant identification,morphological,microscopic indentification,thin layer chromatography are adopted to identify the original plants used as national medicine Andrographis paniculataBurm.

采用原植物、性状、显微、薄层鉴别方法对民族药穿心莲进行系统的生药学鉴定，为其鉴别及应用提供科学依据。

The main characters of new cotton hybrid JiH239 were analysed based on the results of Hebei Cotton Regional Test in 2003~2004. The results showed that JiH239 was high yield, disease-resistance and fiber length and strength were better than CK cultivar, micronaire value was a little high. The Bt toxic protein gene expression levels was higher than bollworm-resistant CK Zhongmiansuo41 in different growing period. The purity of bollworm-resistant was higher than Zhongmiansuo41 in seeding period and no significant variety in bud period and flower-boll period.

笔者以2003~2004年河北省棉花品种区域试验结果为依据，分析了棉花新杂交种冀H239主要性状特征，结果表明，冀H239产量突出，抗病性强，纤维长度、纤维比强度优于对照，马克隆值偏高；苗期、蕾期、花期和铃期棉叶中Bt杀虫蛋白表达量、苗期抗性纯合度均高于抗虫对照品种中棉所41；蕾期和花铃期抗性纯合度与中棉所41差异不显著。

On the basis of analysing the indetermination factors affecting the evacuation start time,studying the main parameters on human evacuation motive ability,and considering the queuing characteristic and multi state phenomenon involved in evacuation performance,mathematical model on the human evacuation behavior in fire was set up.Based on net work theory and relational data base technology. The computer simulation on the optimum of human evacuation routes was realized on Mapinfo platform. This simulation ca...

基于对火灾时影响人员疏散行动的开始时间的不确定因子的分析，以及对火灾时人员疏散行动能力的主要影响因素的研究，在综合考虑建筑物空间疏散性状的排队现象和多态现象的前提下，建立火灾时人员疏散行为的数学模型·利用网论和关系数据库技术，在Mapinfo平台上，实现人员应急疏散路线的全局最优化，实现对疏散出口群集疏散流动规律的预测和评价·其研究成果，可以为建筑物性能化防火设计和应急疏散计划的制定提供科学的参考依据，防止群集事故的发生，减少群集事故的损失

Analysis on heredity parameter of high yield gutta-percha clones suggested that the conformation characters of Eucommia's samaras and fructifications properties had strong repetition.

以35个杜仲无性系和对照的果实、树皮、叶片含胶量、结果性能及其稳定性等关键性状指标为依据，采用欧氏距离法进行聚类分析，可将35个杜仲无性系和对照划分为6类。

Biocontrol may be an alternative to avoid these problems in tobacco disease control. Ata28 strain is an antagonistic bacterium against tobacco brown spot was isolated from healthy tobacco in Chongqing.

Ata28菌株是从重庆烟区烟草健康植株上分离获得的烟草赤星病拮抗细菌，在PDA平板上可明显抑制烟草赤星病强致病力菌株Tbs3的生长，温室控病效果较好；为了进一步提高拮抗细菌Ata28菌株对烟草赤星病的防治效果，本研究采用紫外线、紫外线和氯化锂、硫酸二已酯及微波对Ata28菌株进行诱变选育，以期获得拮抗性能更强，生物学性状更好的优良菌株，为大田使用提供理论依据和实践经验。

Physicochemical properties and microelement contents of soil and their effects on the alpine Allium chrysanthum Regel in Wufeng County of Hubei Province were studied with field investigation and laboratorial analysis in the paper to provide scientific recommendations for the development of alpine Allium chrysanthum Regel resourceses.

采用野外调查与室内分析的方法研究了湖北省五峰县高山野葱适生区域的土壤理化性状、微量元素含量及其对野葱品质的影响，以期为高山野葱资源的合理开发利用提供科学依据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。