重达

Twenty-eight prototrophic revertants of the tryptophan auxotrophs were obtained through spotaneous back mutation from colonies grown on synthetic medium plates or nodules of plants. Most of the revertants have resumed the nodulation abilities and enhanced nitrogen fixation activities as evidenced by darker green color, higher dry weight and more nitrogen contents in shoot than those of the wild type strain 8-1-4A did in pot experiments. However, noodulation abilities decreased to some extent and no significant differences were found in the mass of nodules compared with the parent strain.

通过自发回复突变，从培养平板和根瘤中分离到28个色氨酸原养回复突变型菌株，对其中25株进行植物盆栽试验证明其中24株菌的结瘤功能得到了恢复，而且固氮酶活性普遍比出发菌有所提高，其中41％达到极显著水平，18％达到显著水平，植株地上部分干重及含氮量也有不同程度的提高，唯有根瘤数比出发菌有所降低，其中23％降低达极显著水平，11％降低达显著水平。

The special tribo-electdc tester with high sliding speed and electric current was developed,which mail working parameters are, current density up to 2.5 A/mm~2, the sliding speed 100 m/s,the load over 500 N (3.2 MPa) and the pulsant strike pressure within 20 N. This testersuccessfully simulates the tribological and electric properties of strip materials. 2, By using the above tester, study on tdbological properties and carrying currentperformances of copper-base powder metallurgy material and metal impregnation carbonmaterial are carded out.

本论文开展的主要研究内容和所取得的成果如下： 1、首次开发了大电流、高速度和重载荷的载流摩擦磨损专用试验机，能够稳定提供恒定交流电流密度2.5 A／mm~2，相对滑动速度100 m／s(12000 r／min)，载荷可达500 N(3.2MPa)，脉动冲击载荷可达20 N，为研究提速接触网和滑板的高速载流摩擦学特性及其机理，以及开发新型高耐磨性、高载流性能滑板材料提供了先进可靠的试验手段(该机已获得一项实用新型专利，ZL 2006 2 0096036.5)。

Experiments of bioremediation and control were conducted with the alkali meadow grass planted in saline soil for 3 years. Contrasted with control group, topsoil desalination rate was up to 77.00%; pH value decreased 0.25 pH unit; soil bulk density decreased 0.14 g/m^3; total porosity increased by 5.29%; soil aggregate structure increased by 23.14%; soil water content increased 70.30 g/kg; average triennial alkali grass yield was 36000 kg/hm^2. In addition, planting forage in saline soil as a medium and establishing a compound agro-forestry-animal system promoted the sound combination of planting industry, forestry, and livestock husbandry. Because of the reasons, utilization ratio of land reached more than 184.00%; the income of land increased from 16300 to 35500 yuan/hm^2 average income per farmer in the controlling region increased by 66.00%, from 2160.70 to 1300.80 yuan.

生物修复与调控试验研究表明，草甸盐土经种植碱茅草3a，耕层土壤与对照相比脱盐率达77.00%，pH值下降了0.25个单位，容重降低0.14g/立方公尺，总孔隙度增加5.29%，团粒结构增加了23.14%，自然含水量增加70.30g/kg.3年生碱茅草平均产草量36000 kg/hm^2；盐化耕地采用以种植牧草为中介，将种植业与农区林业、畜牧业有机结合成互相依存，互相促进的农林牧复合生物系统治理后，土地利用率可达184.00%以上，可获得16300~35500元／hm^2的经济收入，治理区农户人均纯收入由1300.80元增加到2160.70元，增加了66.00%。

Based on this context, this paper applies CCM to assess the accessibility of public bus network by introducing multiple bus lines in the certain road sections and considering the spatial distribution of population being assigned to each bus stop. The bulk bus line demand, as the substitution of original BLD, is therefore used to reflect the people,s convenience in taking public buses.

基于道路容量需求与可达性所表征的交通便捷程度意义相反的关系，以地面公交线网为对象，在已知城市人口分布的条件下，考虑公交线路重复数的影响，对CCM加以改进，提出通过计算公共交通线路容量需求来评价地面公交线网可达性的方法。

Methods: Twenty-four rabbits were randomly divided into three groups:① the control group(group C, n=8): received sternotomy only and no ischemia;② the ischemia/reperfusion group(group I/R, n=8): the left lungs of rabbits were rendered ischemia by ligating the left pulmonary hili for 60 minutes followed by 60 minutes reperfusion;③ the edaravone group(group E, n=8): the left lungs were rendered ischemia for 60 minutes followed by 60 minutes reperfusion, and 10 mg/kg edaravone was administered intravenously 5 minutes prior to ischemia. Blood MDA and SOD were measured. Protein concentrations, WBC count, and PMN percentage in broncho-alveolar lavage fluid were determined. Samples of left lung tissue were sent for determining the left lung dry-to-wet weight ratio and evaluating the pathologic changes.

采用兔肺原位热缺血再灌注损伤模型进行研究。24只大白兔随机分为三组：①对照组(C组， n=8)，开胸后不阻断肺门，静脉缓慢推注生理盐水5ml/kg；②缺血再灌注组(I/R组， n=8)，左肺接受60min的缺血，然后接受60min再灌注，于缺血前5min静脉缓慢推注生理盐水5ml/kg；③依达拉奉干预组(E组， n=8)，于缺血前5min静脉缓慢推注依达拉奉10mg/kg（5ml/kg），左肺接受60min的缺血，然后接受60min再灌注。120min实验结束时，留取各组动物血液标本，测定血浆丙二醛含量及超氧化物歧化酶活性；收集支气管肺泡灌洗液，检测支气管肺泡灌洗液中白细胞计数、中性粒细胞百分比及肺通透性指数；留取肺组织标本，测定肺组织湿、干重量，计算干／湿重比及行肺组织病理检查。

With a wingspan of up to nine feet weight of up to 20 pounds, the Steller's far outsizes North America's bald eagle.

翼展几达三公尺、重可达九公斤的虎头海雕，体型上远超过北美洲的白头海雕。

With a wingspan of up to nine feet two meters and weight of up to 20 pounds ten kilograms , the Steller's far outsizes North America's bald eagle .

翼展几达三公尺，重可达九公斤的虎头海雕，体型上远超过北美洲的白头海雕。

Is approved by the Trade and Industry Bureau Liangshan Prefecture of Liangshan register the largest export companies, trailers, semi-trailer, tractor, dump truck, cement mixer, oil, particulate materials, vehicles , mining vehicles, sprinkler, military vehicles and other special vehicles for sale mainly CNHTC are only at the designated level Yuanliangshan distributor, the sales Lok Ho HOWO, Steyr King, the Prince, Yun-Ho ,-ho cards, Steyr and other models have been successfully exported to more than 50 countries and regions, with annual sales of more than 100 million yuan.

山东梁山骏达汽车贸易有限公司是经梁山县工商局批准注册的梁山地区最大的对外贸易出口公司，以挂车、半挂车、牵引车、自卸车、水泥搅拌车、油罐车、颗粒物料运输车、矿用车、洒水车、军用车等专用车辆销售为主，是中国重汽在梁山地区唯一指定一级经销商，所销售的 HOWO 豪泺、斯太尔王、金王子、豪运、豪卡、斯太尔等车型已经成功出口50多个国家和地区，年销售额达100000000元人民币以上。

In mid-August, we embarked on a program aimed at decongesting Dadaab and started the relocation of some 12,900 refugees to Kakuma camp in northwest Kenya.

在八月中旬，我们开始计划减少达达阿布难民营的人数，并开始将约12，900名难民重置于肯尼亚西北部的卡库马难民营。

Corn borer is the main harmful insect which our city corn produces, each yearly average has the varying degree the occurrence, year to year loses 5%~ about 10%, seriously has the year loss to reach 18%, seriously affects my city corn the output and the quality.

玉米螟是我市玉米生产上的主要害虫，每年均有不同程度的发生，每年由于玉米螟危害造成的损失达5%～10％左右，重发生年损失达18％，严重影响我市玉米的产量和质量。

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。