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Using ASTM method as basic model,a method is proposed for measuring distillation range of petroleum fractions by Engler distillation related with gas chromatography simulated distillation technology.

以美国材料与试验协会方法为基础模型，提出一种基于色谱模拟蒸馏技术的恩氏蒸馏馏程测定方法。

Erodible soil fractions are usually dislodged from projections and trapped in depression.

可冲蚀土壤部分经常从凸出物剥蚀并降落于洼地。

The soil erodibilities are compared and appraised for the majority of the soil types in Ningxia. The method published by D. W. Fryrear et al is adopted to calculate erodible fractions for the soils in Ningxia. The erodibilities of main soil types are compared and analyzed. Spatial distribution of soil erodibilities in the region can be perceived on the Map of Ningxia Soil Erodibility. The map is based on the digitized map of soil types of the all region by means of the geographical information system of Region Manager. Evaluation results show that erodible soils occupy a large portion of the total area of the region.(3) The third task is evaluation of effects of human activities for farming on soil erodibility. Tillage and cultivation can alter soil properties. The paper, based on the discussion on the characteristics of farmland suffering wind erosion in the region, analyzes the contents and intensities of farming disturbing surface soil. Emphasis is paid on the effect of farming on erodibilities of each type of soil.

W Fryrear等人的计算土壤可蚀部分含量的方程，此方程的自变量包括土壤有机质、碳酸钙、沙粒含量、沙粘比，计算了宁夏主要土壤类型表层的可蚀含量，进而比较它们的可蚀性，并以宁夏土壤分布图为底图用地理信息系统建立了宁夏土壤风蚀数据库，完成了宁夏土壤可蚀性图，评价结果显示宁夏地区主要的土壤类型较容易遭受风蚀；（3）农业经营对土壤风蚀的影响及其评价，在分析宁夏农业土壤遭受风蚀特征的基础上，首先讨论了农业活动对土壤理化性质的干扰，评价主要耕作栽培措施对土壤风蚀的影响，选取粗糙度、表面结皮、可蚀颗粒含量、留茬和有效时间为指标，用打分方法作了评价。

The root of Leptopus Chinensis Pojark, belonging to Euphorbiaceae, was extracted with petroleum ether, chloroform and methyl alcohol by different methods. Insecticidal activitives of crude extracts and fractions against Plutella xylostella were tested, and its effects on activities of several enzymes from the pest were evaluated.

本研究以大戟科植物雀儿舌头为实验材料，用多种有机溶剂和不同提取方法对雀儿舌头的根进行抽提，用抽提物及其萃取物分别对危害蔬菜的重要害虫--小菜蛾进行了生物活性测定及几种酶活性的影响，实验结果如下： 1。

Theoretical analyses indicate that the reduction of internal relative humidity or so_called self_desiccation of HPC may be mainly caused by the increase in the mole concentration of soluble ions in HPC and the fractions of gel water, absorbed water and interlayer water in the total amount of evaporable water.

理论分析表明，混凝土中可溶离子浓度的增大，及凝胶孔水、吸附水、层间水在总可蒸发水量中的比例增大是导致HPC自收缩或自干燥的主要机理。

Dispatch of new wall bulletin at the beginning of 2007, business of 4 big telegraphic operation ever experienced an IM upsurge, mobile, UniCom and net reduction of fractions to a common denominator are not rolled out " flying letter "," exceed a letter " and " sharp letter ", guess in people telecommunication prepares to abandon this one market generally when, chinese telecommunication is incompact however roll out the IM software with an expatiatory name slow --, wide happy communication.

新快报讯 2007年初，国内四大电信运营商曾经历了一场IM热潮，移动、联通和网通分别推出&飞信&、&超信&和&灵信&，就在人们普遍猜测电信准备放弃这一块市场的时候，中国电信却不紧不慢地推出一款名称冗长的IM软件———宽乐通信。

A SPE procedure was suggested for extracting and concentrating fisetin by using different volume fractions of ethanol in aqueous solution as the loading conditions.

分别以中药黄栌的主要成分非瑟酮为印迹分子、丙烯酰胺为功能单体及乙二醇二甲基丙烯酸酯为交联剂，通过封管聚合法合成了分子印迹聚合物；将其装于自制的固相萃取柱中，研究了以不同体积比的乙醇-水溶液为溶剂时非瑟酮在柱上的保留行为；通过优化清洗及洗脱条件，使非瑟酮与它的结构相似物槲皮素在柱上得到了很好的分离。

The successive χ2 test begins with the determinations of gametic or zygotic selection types, followed by the estimation of recombination fractions between two markers with the Newton-Raphson iteration method.

对取自MAPMAKER软件小鼠F2群体(含333个体)的5个RFLP连锁标记数据作了共显性分子标记偏分离的分析。

MethodsMicrowave-assisted flow and macroporous absorptive resin were employed respectively in the extraction and purification processes. The content of gentiopicrin in the fractions was evaluated by HPLC.

方法以龙胆苦苷含量和解吸率为指标，采用微波辅助萃取、大孔树脂吸附纯化和高效液相色谱法测定龙胆苦苷的含量。

MethodsMicrowave-assisted flow and macroporous absorptive resin were employed respectively in the extraction and purification processes. The content of gentiopicrin in the fractions was evaluated by HPLC.

方法以龙胆苦苷含量和解吸率为指标，采用微波辅助萃娶大孔树脂吸附纯化和高效液相色谱法测定龙胆苦苷的含量。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。