查询词典 chemical analysis

Combining with pot experiment, indoor chemical analysis and statistic analysis, this research was conduced to study the effects of soil and fertilization on yield and quality of Trifolium pretense from the point of plant nutrition.

本试验以红三叶为材料，采用盆栽试验、室内化学分析和统计分析相结合的方法，从植物营养的角度研究了土壤和施肥对红三叶产量和品质(包括饲用品质、矿质品质、保健品质)的效应。

An automatic sampling system was applied in SHAOGANG №6 sintering plant,it is made up of bucket type cutter sampler,chemical analysis sample preparation,sinter size analysis and tumbler test etc.

韶钢烧结厂新建的6号烧结机(360 m2)采用了一套自动采制样系统，该系统由采样、化学样制备、粒度分析和转鼓检测等的几个部分构成。

By way of f-CaO chemical analysis and thermal analysis, the article studied the influence of K_2O on the mineral of C_2S or C_4A_3 which chiefly formed a cement of high silicon belite sulphur aluminate cement .

目的为研究K2O对高硅贝利特硫铝酸盐水泥主要矿物C2S和C4A3 S的影响，为含有钾的低品位矿物原料生产高硅贝利特硫铝酸盐水泥奠定了基础。

Through theoretical analysis of bischofite＇s pyrolysis and chemical analysis of intermediate products during different sintering stages, anhydrous magnesium chloride was presumed to be the precursor, which was confirmed by the preparation of MgO whisker from anhydrous magnesium chloride.

通过对水氯镁石热解的理论分析、以及对灼烧各阶段产物的化学分析，确定生成晶须的中间产物为无水氯化镁，然后直接从无水氯化镁制备出MgO 晶须。

By the testing means of electron-spectroscopy for chemical analysis , thermogravimetric analysis , differential scanning calorimetry , transmission electronmicroscopy , the results have shown that the emulsion polymerization in situ in the presence of nano-particle of calcium carbonate can happen smoothly and successfully and the surface of nano-particle of calcium carbonate have been capsulated by polymer of acrylates, which prevent from the agglomerating of nano-particles of calcium carbonate. Because the copolymer of acrylate has good compatibility with some plastics such as PVC, ABS, AS and so on, so the dispersion of nano-scale calcium carbonate as nanometer size in these plastics can be reached more easily and the effects of nanometer can happen.

通过X射线光电子能谱、热失重分析、动态扫描量热分析、透射电子显微镜等手段，证实在纳米碳酸钙原生粒子存在下，可以进行丙烯酸酯类的原位乳液聚合，乳液聚合顺利，纳米碳酸钙表面被丙烯酸酯类聚合物所包覆，使纳米碳酸钙粒子间的团聚不易发生，同时由于丙烯酸酯类聚合物与PVC、ABS、AS等极性聚合物具有较好的相容性，从而使纳米碳酸钙在聚合物基体中能达到纳米状态分散，从而发挥纳米效应。

By means of chemical analysis, rigidity test, metallographic examination and fracture analysis, it was found that the main reason for the backup roll's desquamation was possible crack headspring which was offered by impurity in interior tissue.

通过对其进行成分分析、硬度测试、金相检验及断口分析，确定了支撑辊剥落的原因：内部组织中夹杂物等提供了可能的裂纹源，裂纹在此产生并逐渐扩展，起初因摩擦磨损在轧辊表面形成轻微点蚀及小块剥落，受到辊型和载荷等其他外部因素的影响，在应力集中部位产生大面积剥落，从而导致轧辊报废。

By means of chemical analysis,rigidity test,metallographic examination and fracture analysis,it was found that the main reason for the backup roll's desquamation was possible crack headspring which was offered by impurity in interior tissue.The crack came into being here and then extended outward gradual...

通过对其进行成分分析、硬度测试、金相检验及断口分析，确定了支撑辊剥落的原因：内部组织中夹杂物等提供了可能的裂纹源，裂纹在此产生并逐渐扩展，起初因摩擦磨损在轧辊表面形成轻微点蚀及小块剥落，受到辊型和载荷等其他外部因素的影响，在应力集中部位产生大面积剥落，从而导致轧辊报废。

The glyoxal and glyoxalic acid contents in the solution of oxidation of acetaldehyde to glyoxal by nitric acid were determined by this method, the repeatabilities of analysis results were excellent and the relative error compared to chemical analysis of glyoxal was 1.77%.

用HPLC测定乙醛硝酸氧化法制乙二醛反应液中乙二醛和乙醛酸的含量，结果的重复性好；对乙二醛的测定结果与应用化学分析法测定结果的平均相对误差为1.77%；对反应液中乙二醛、乙醛酸含量的测定有着较高的加标回收率，分别为99.6%～103.3%和98.1%～102.4%。

With Yangtze delta tidal flat as an example, through the analysis on the magnetic characteristics of tidal flat sediment and the study on the space distribution of heavy metal elements, this thesis discussed the impact to Shanghai sea bank brought by heavy intensity development, and the interrelation between sediment power effect and heavy metal pollution space distribution. Utilizing the advantage of artificial intelligence neural network, in conjunction with environmental chemical analysis, from the angle of view of sediment magnetic characteristics, it analyzed the connection mechanism between magnetic mines and heavy metal element within tidal sediments, and built a quantitative magnetical diagnosis model, in attempt to calculating the tidal heavy metal pollution status from the magnetic measurement data of sediments and assess it's impact to the environment.

中文题名长江口潮滩重金属污染的磁诊断模型研究副题名外文题名论文作者许羽导师俞立中教授学科专业自然地理学研究领域\研究方向资源与环境信息系统学位级别博士学位授予单位华东师范大学学位授予日期2001 论文页码总数111页关键词长江口潮滩沉积物环境磁学重金属污染馆藏号BSLW /2001 /X145 /11 本文以长江口南岸潮滩为例，通过对潮滩沉积物磁性特征的分析、重金属元素空间分布的研究，探讨了上海滨岸带高强度开发对潮滩环境质量的影响，以及沉积动力作用与重金属污染空间分布格局的联系。

The chemical analysis of N, P and K in organic fertilizer is presented: sample is decomposed by sulfuric acid-hydrogen peroxide and prepared to be a solution. N can be determined by NC-2 model quick N analysis set, P by chinoline molybdic acid method and K by tetraphenylboron potassium, needless of spectral photometer and flame photometer, the method is available when the content of N, P or K is over 0.1% with desired accuracy and precision.

介绍用化学分析方法测定有机肥料氮、磷、钾的含量，即样品经硫酸-过氧化氢消化后，制备待测溶液，分取待测溶液用NC-2型快速定氮仪测定氮，用磷钼酸喹啉重量法测定磷，用四苯硼酸钾重量法测定钾，不需使用分光光度计和火焰光度计，适宜一般复混肥料厂采用，对含氮、磷、钾分别达0.1％以上的样品均可用本法测定，方法的准确度和精密度能满足生产的要求。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。