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Root-derived organic carbon is composed of three compartments: root detritus, root eaudates and root symbionts, which represents a large important and potential C sink in forest ecosystems, The known responses of root derived organic carbon and heterotrophic microbes to elevated CO2 were reviewed. Overall, increases in root biomass, productivity, and exudation indicate an augmentation of C inputs into the soil via roots, although changes in root lifespan are still unclear and may modify this flux positively or negatively, Altogether, changes in root chemistry and morphology that may augment soil C storage under elevated CO2 include decreased N concentration and wider root diameter, Alternately, a shift in rooting depth upwards in the soil profile may increase average turnover rates of root detritus. Effects of CO2 concentration on C qualities of root exudates and root symbionts are the least understood components discussed here, Changes of soil heterotropic microbial activity and community under elevated CO2 still remained large uncertainties.
林木根源有机C包括根东通过根枯落物、根系分泌物和根共生菌周转3条途径向土壤输入的有机C,它是森林生态系统中一个重要的、潜在的C汇,综述了根源有机C与其微生物对CO2浓度升高的响应,虽然对根系寿命的变化尚不清楚,但CO2浓度升高将导致根系生物量、生产量、死亡量和分泌物的增加;同时,CO2升高亦促使根共生菌生物量的增加而增加了共生菌的C归还潜力,表明CO2升高使根源有机C的输入增加了,CO2农度升高情况下,根系化学性质和形态特征的这些变化均有利于增加土壤C的吸存;而根分布深度的降低则对土壤C吸存不利;CO2浓度升高对根分泌物和根共生菌质量的影响研究则极少,CO2浓度升高下土壤微生物活性和群落组成的变化存在较大的不确定性,目前CO2浓度升高下林木根源有机C对森林长期C吸存的贡献仍很不清楚。
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With the IAP Prediction System of Short-term Climate Anomaly, two sets of seasonal and extra-seasonal ensemble hindcasts have been performed during the period of 1980~1994 in order to assess the prediction skill of the IAP PSSCA with two different schemes The difference of the two schemes is in the different version of AGCM used, with the IAP AGCM 1 1 in one scheme and the IAP AGCM 1 2 with an improved surface albedo parameterization in the other Comparisons of the hindcast results with the observations show that IAP PSSCA is capable of predicting the precipitation anomaly to some extent In the eastern China largely affected by Asian monsoon and SST anomalies, the prediction skill is relatively high, especially in the Southeastern China where the anomaly correlation coefficient can reach as high as 0 50 in the severe flood and drought years This may suggest that the possible mechanisms for these severe disasters have been well captured by the IAP PSSCA The prediction skill is higher for the modified model AGCM 1 2 as the model's climatological state is well simulated This indicates that models with reasonable land process will improve the prediction skill for short-term climate prediction
利用中国科学院大气物理研究所研制的短期气候距平数值预测系统,种版本的大气环流模式:AGCM 1.1和AGCM 1.2,分别以2月11~19日的9天大气观测值为初始场,以给定海温为边界场,对1980~1994年的15年的降水异常进行了两组集合后报试验。对试验结果进行定量评估表明:IAP PSSCA对降水异常具有一定的预测能力,特别是在中国东部受东亚季风及海温异常影响的地区,IAP PSSCA具有较高的预报技巧,其中以东南区域(包括江淮流域和华南地区)最高,尤其是对有洪涝灾害的降水异常年,距平相关系数在0.50左右,接近可供业务使用的要求,说明模式能够抓住在东亚季风区存在的某种物理机制,从而提高了这一地区的预报技巧;另外,两个大气环流模式相比,改进了地表反照率的AGCM 1.2的15年集合平均预测技巧略高于AGCM 1.1,特别是在华北地区,预测效果有明显提高,这表明改进地表反照率从而改进了模式的气候平均态的模拟,能提高气候模式的预测能力,说明较好的陆面过程引入模式对短期气候预测是有益的。
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Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.
对苯二甲酸与氯气在碘存在下以发烟硫酸为溶剂进行氯化制备四氯对苯二甲酸;再以DMF为催化剂与二氯亚砜反应生成四氯对苯二甲酰氯;以氟化钾为氟化剂,环丁砜为溶剂置换氟化,再与甲醇酯化得到四氟对苯二甲酸甲酯;以KBH4-LiCl为还原剂二甲醚为溶剂反应制得四氟对苯二甲基苄醇;以氯苯为溶剂在溴化氢溶液中溴化得到溴化产物;在乙醇溶液中经镁粉还原得到4-甲基-2,3,5,6-四氟苄醇;甲基苄醇与功夫酸在催化剂二环己基碳二亚胺和4-二甲氨基吡啶作用下缩合得到七氟菊酯,总收率达43.6%。
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Xiaoxiaomu is a working girl from yunnan who made a living in shanghai, for years, she have been looking for kangkai, when she was 14 years old, she cheated kangkai and got the imburse in order to support her younger brother to go to junior shool and university, she hope to find kangkai and apologized sincerely to him and refund the mondey so her heart can be at ease, when she saw the tired kangkai and didn't tell the truth to him, just gave up her previous work and came to kangkai restaurantto work and support this kind brother,,kangkai was dull to the feeling around him after sangjie died because he could not forget his previous wife, xiaomu feeling to kangkai is far more than thankfulness , she also found kangkai was not only strongly responsible for his marriage and family but also earnest and inflexible to his feeling , she loved him deeply.
萧晓牧是一个从云南来上海讨生活的打工妹。多年来,她一直在寻找着康凯。因为在她14岁时,她是骗得了康凯的资助,才供弟弟萧晓朴读完了高中、考上了大学。她希望能找到康凯去诚恳道歉,并还上康凯的钱以了却自己的心愿。当他看到康凯那疲惫不堪的生活状态,没敢对已经认不出自己的康凯贸然坦白,只是辞掉原来的工作,来到康凯的小餐馆里当服务员,默默地支持这个心地善良的大哥。尚洁去世后,康凯因为不能忘怀前妻,而对周围的一切感情反应麻木。晓牧对康凯的感情却不仅仅是感恩,她在和康凯的接触中,真实地感受到康凯对婚姻和家庭有着强烈的责任感,对感情认真、执著。她深深地爱上了这个大哥。
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Sometimes does have relationship with them and sometimes does not have, affects when the direction the timing negative; The asset structure has the remarkable influence to the ROA; Produced assets, the total asset scale mainly lead to positive affect to manage achievement, but sometimes, in the different industry existence scale uneconomical phenomenon, will appear the negative influence; The revolving property and the consumptive property produce negative influence to manage achievement; The sales rate of incensement have no remarkable influence to manage achievement.
研究发现资产结构对营业收入净利率和净资产收益率的影响因会计年度不同而表现出不同的程度的相关性,有时有有时无,影响方向时正时负;资产结构对总资产报酬率有显著影响;产能性资产、总资产规模对经营业绩总体影响为正,但有些行业存在规模不经济的现象,有时会出现负方向影响;周转性资产和消耗性资产对经营业绩影响为负;销售增长率对经营业绩没有显著影响。
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The influences of dioxins on human health and the situation of its emission in China are presented,and its pollutant sources are analyzed.It is pointed out that to resolve the dioxin pollution problems in China some work for instance the investigation of pollutant sources must be carried through;the inspective system made perfect;the pollutant sources treated through the circular economic method;the study of environmental iatrology s...
介绍了二噁英类物质对人体健康的影响以及我国二噁英类物质的排放情况,对二噁英的污染源进行了分析,指出要解决我国二噁英的污染问题应该立即开展对污染源的调查;完善监测系统;利用循环经济的原理从源头进行治理;加强对环境医学的研究;加强对二噁英类物质降解过程的基础研究。
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In Adso's narration, he received the knowledge-craze from the monk in the abbey, also the tirelessly pursue of books, the incomprehensible infatuation of parchment, the pursuit after a poisonous book, and the incessant shock on body and psychology from the insuppressible desire.
在阿德索的叙事中,他接受到了修道院里僧侣们对知识的狂热,对书籍的孜孜追求,对手抄书工作的令人费解的迷恋,对一本有毒的书的百般追寻,以及压抑不住的生理欲望对身体和心理的不断冲击。
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According to modifying effect of magnetic field to resin, through modification of FRP pultrusion process and equipments, this dissertation developed FRP rebar magnetism curing pultrusion process, studied the effect of fabrication magnetic field intensity on mechanical performances of fabricated GFRP rebar, and confined the optimal intensity of curing magnetic field. Through durability contrast test of GFRP rebars fabricated with optimal curing magnetism intensity and without magnetic field in 80℃water, according to water-absorbing capacity and interlaminate shear strength, the effect of magnetism curing on the durability performance of GFRP rebar was studied.
根据磁场对树脂的改性作用,对FRP拉挤成型工艺设备进行改进,研究开发了FRP筋磁场固化拉挤工艺;研究了成型磁场强度对成型后GFRP筋力学性能的影响,确定了最佳磁场强度;对最佳磁场强度成型和无磁场成型GFRP筋进行80℃水中的耐久性对比试验,以吸水率和层间剪切强度为指标,研究了磁场固化工艺对GFRP筋耐久性的影响。
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Based on this,We designed a series of experiments to study the treatment and its mechanism of Iridoids composition of Valeriana jatamansi Jones of the IBS animal model.1 Research on Iridoids composition of Valeriana jatamansi Jones in the role of gastrointestinal function.1.1 Effection of Iridoids composition of Valeriana jatamansi Jones on gastrointestinal function of normal miceMethods:Compared with normal group and YJBH group,mice which has given Iridoids composition of Valeriana jatamansi Jones as 71.2mg/kg,35.6mg/kg,17.8mg/kg,8.9mg/kg was detected gastric emptying and small intestinal propulsion after 4 days drug given.Results:Compared with normal group,gastric emptying and small intestinal propulsion in 35.6mg/kg and 17.8mg/kg group was inhibited.
课题通过观察蜘蛛香环烯醚萜对正常及IBS模型动物的胃肠道功能、精神活动的影响,以及蜘蛛香环烯醚萜干预下IBS大鼠结肠、血清、中枢5-HT含量,结肠5-HTR3A受体的mRNA和色氨酸羟化酶(TPH1)的mRNA表达,结肠和血浆中SP和VIP含量以及结肠中肥大细胞分布,探讨蜘蛛香环烯醚萜对腹泻型IBS的治疗作用及其作用机理,为临床治疗IBS提供实验依据。1蜘蛛香环烯醚萜对胃肠功能的作用目的:探讨蜘蛛香环烯醚萜对胃肠功能的影响1.1蜘蛛香环烯醚萜对正常小鼠胃肠功能的作用方法:正常小鼠灌胃给予蜘蛛香环烯醚萜71.2mg/kg、35.6mg/kg、17.8mg/kg、8.9mg/kg与空白组和越鞠保和丸组对照,给药4日后测定动物的胃排空率和小肠推进率。
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Here belongs, first of all, an initial clarification of "judicative" doing and the "judgment" itself, along with the discrimination of immediate and mediate judgments: mediate judgments have such a sense-relatedness to other judgments that judicatively believing them "presupposes" believing these others——in the manner characteristic of a believing on account of something believed already.
在这里,顺着对&直接判断&和&间接判断&的区分,含有一种对&判断&行为和&判断&本身的最初澄清:间接判断含有一种对其他判断的含义上的关联——相信这个判断,就&预设&了对其他判断的相信(这是一种根据已经相信的东西而进行相信的特定方式)。还有对'努力得到被奠基的判断'的澄清。
- 推荐网络例句
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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.
然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。
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Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.
镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。
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A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.
付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。