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By collecting ,testing, comparing, and analyzing the soil samples, soil recovery under the various recovery conditions along Mian CountyNingqiang highway was studied. The results were as follows herbaceous recovery to the soil fertility recovery in the prior was greater than the combination of grass and irrigation or than the pure bushes recovery. In each of them, the content of organic matter were 13.84, 7.50, 6.00 g·kg-1; In the recovery of herbaceous ecology, to grow leguminous plant and granminaceous plant together was better than pure graninaceous plant or pure leguminous plant. In each of them, the content of organic matter was 29.67, 17.51, 9.37 g·kg-1; to sow ryegrass and alfalfa together with some local grass seeds or to grow coxcomb, alfalfa and local couch grass together could bring better effects than to plant the alfalfa only. In each of them the increased organic matter contents were 4.93,17.51 and 9.37 g·kg-1;the quotas of the organic matter and alkaline hydrolysis nitrogen in soil fetility factor were closely connected, mainly because of the difference between the generation quantity and resolution quantity of the organic matter in the soil surface.

采集土壤样品,经室内分析化验,用对比分析的方法对勉县至宁强高速公路生态恢复中不同恢复类型条件下的土壤恢复进行了研究,结果表明草本恢复类型对前期土壤肥力的恢复作用大于草灌结合,并大于单纯灌木恢复类型,其中有机质含量分别为13.84、7.50和6.00 g·kg-1;在草本生态恢复类型中,豆科植物与禾本科植物混播恢复类型大于禾本科植物恢复类型的作用,并大于单纯豆科植物恢复类型的作用,其中有机质含量分别为29.67、17.51和9.37 g·kg-1;黑麦草与苜蓿混播并有当地草种入侵以及小冠花与苜蓿混播并播入当地草种羊茅,明显优于纯苜蓿单播,其中有机质含量分别增加了4.93和3.32 g·kg-1;土壤肥力因子中有机质与碱解氮两个指标有较好的相关性,主要与土壤表层有机质的生成量和分解量之差有关。

The results indicated that the soil physical fertility characteristic of super high-production cornfield was high, mainly display in the topsoil was deep, soil bulk density changed between 1.01-1.26 g/cm3, disarrangement rate of soil structure was...

研究结果表明,超高产玉米田土壤物理肥力特性较高,主要表现在耕层较深厚,土壤容重变化在1.01~1.26g/cm3,土壤的结构破坏率较低;在土壤的化学环境特征方面,土壤碱解氮、速效磷、速效钾等均未表现出明显的变化规律;所有超高产田的土壤阳离子交换量均不同程度地高于普通生产田,这与超高产田的定向培育有直接关系;一些超高产田有机质低于普通生产田,其原因与超高产田氮素施用量较高、促进了土壤有机质矿化有关。

Because of the development of chemical fabric, rising of artificial technology and making progress of technology, which are the reasons of making a amount of the difficult biochemistry degrade of PVA serosity, artificial silk alkali solve matter and new-type auxiliary thing to enter into dyeing wastewater in recent years, and COD rises 2000-3000mg/L.

近年来由于化学纤维织物的发展,仿真丝的兴起和印染后整理技术的进步,使PVA浆料、人造丝碱解物、新型助剂等难生化降解有机物大量进入印染废水,使COD浓度从原来的数百毫克每升上升到2000-3000mg/L,从而使原有生物处理系统COD去除率从70%下降到50%左右,甚至更低,传统的生物处理工艺受到严重挑战,作为纺织品的生产,其生产过程关系到人们生活的大环境。

The chemical activating mechanism of UA is that CG can stimulate pozzolanicity more effective than gypsum because of higher solubility and looser crystal structure; but CG has poor property on retardation setting, and this shortage can be solved by mixing with gypsum; CS can offer alkali activity, which can depolymerize silica and aluminum glass, and benefit for other activity methods and overcome the disadvantage of HF on setting time; Sodium sulfate improves early strength greatly but loses the final strength. NF can improve both early and final strengths.

联合激发技术的化学激发机理是,煅烧石膏溶解度高及晶体结构松弛,比天然石膏的活性激发效率高,但降低石膏的缓凝作用,与天然石膏混合既可提高活性又能保持缓凝作用;干法电石渣提供碱激发,促进高钙灰中硅、铝玻璃体解聚,并克服高钙灰对凝结时间的不利影响;硫酸钠虽然早强作用明显,但使后期强度倒缩,NF使各龄期活性都得到提高;磨细的物理激发使高钙灰大颗粒中的CaO和富集碳组分被磨细、分散,活性增加而危害性降低。

It's found that th e activation of alloy was improved with increasing the concentration,temperature and immersing time of alkaline solution,the reason is that the Zr-rich surface of alloy was conversed to Nirich surface because of the strong erodent action of alkaline solution,this catalyzes ...

实验发现:储氢合金电极的活化性能随碱液浓度增大、温度升高以及浸泡时间的延长得到改善,主要由于KOH的强腐蚀性使合金表面由富Zr层转化为富Ni层,为氢的吸附离解起到催化作用,总结出最佳KOH处理液的实验参数:6mol/L、80℃、浸泡 2 4h ,在此条件下合金电极循环两周即达最大放电容量。

Daxing as the case study has been studied in this dissertation, with the help of geostatistics and GIS, on the basis of data of the second general soil quality investigation in 1982 and the corresponding data of indoors soil analyzed, the spatio-temporal law of organic total-N, hydrolyzable nitrogen, available-P and available-K below the surface of soil (0-20cm) within 20 years in Daxing has been studied, as the same time, the change of soil quality has been evaluation applying to the method of soil quality compressive index, the main results are as follows

本文以北京市大兴区为研究样区,以相同样点的1982年第二次土壤普查土壤肥力数据和2000年的新采土样分析数据为基础,运用GIS与地统计学结合的方法,研究了20年来北京市大兴区300多点位的表层土壤的(0-20cm)有机质、全氮、碱解氮、速效磷、速效钾等肥力要素的时空变化规律,应用土壤质量综合指数法定量评价了表层土壤质量的变化,研究主要结论如下

Delayed Extraction Matrix Assisted Laser Desorption/Ionization Mass Spectrometrywas used to high resolution analysis of mix based DNA samples,using the binary matrices 3 HPA(3 Hydroxy 2 Picolinic Acid)/PAand substrate nitrocellose film.

本文使用延迟引出基体辅助激光解吸/电离质谱( DE- MALDI- MS)法,以3-羟吡啶甲酸和吡啶甲酸混合液为二元基体,硝化纤维膜为基底,对混合碱基组成的 DNA样品进行高分辨率测定,获得满意的结果:DNA2 0 - mer分子离子峰分辩率为 8769,DNA 36- mer为 1 650 ,DNA 54- mer为 843,前二者的组成分子离子峰各同位素峰清晰可辩。

The viral DNA on the egg surface contaminated by polyhedra could be eliminated by treating with ten units of Dnase.

经碱解处理并用10U的DNase可以除去残留在卵表上的多角体及其所有的病毒DNA。

Soil samples from tea gardens located in Laoshan green tea planting area were tested, and the distribution and the seasonal dynamic changes of the soil organic matter, available nitrogen, phosphorus and potassium of those samples were analyzed with variance analysis and cluster analysis by SPSS.

根据崂山绿茶重点种植区内茶园土壤的实测数据,分析了土壤有机质、碱解氮、速效磷、速效钾的分布特征及季节变化动态,并运用SPSS软件,对所选茶园的土壤养分水平进行方差分析和聚类分析。

In this report, half-esterification between these pendent hydroxyl groups of hydroxyl-PU and maleic anhydride could lead to new pendent groups, carboxylic groups. These highly polar carboxylic groups in the side chain of PU could play the role of internal emulsifier. They had self-dissociation ability in the water or were neutralized first by appropriate amount of base. Then, PU bearing carboxylic group could dispersed steadily in the water, named aqueous-based polyurethane dispersion.

在本论文中,利用原来亲油性Hydroxyl PU主链段上悬挂的羟基经由与琥珀酸酐的半酯化(Half-esterification Reaction)反应后,使PU在侧链上悬挂具有强极性的羧酸基,其可作为聚胺酯分子中的内乳化剂,羧酸基能在水相中自身解离产生离子或加入适量碱使之中合,使聚氨酯高分子能够稳定分散於水中,即所谓水性PU分散液(Aqueous-based Polyurethane Dispersion)。

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