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The Molar conductivity indicates that all the complexes are nonelectrolyte. IR spectra show the ligand is bonded with RE ion through its oxygen atom in hydroxyl group of phenol; NO3 is coordinated as a symmetrical chelating bidentate group; the coordinated atoms of DMF and DMSO are the oxygen atoms in carbonyl and sulfoxyl groups. Fluorescence spectrum suggests that the Tb3+complexes have characteristic luminescence and its fluorescence intensity is enhanced after doping with La3+, Gd3+, Y3+, influence of doping ions and neutral ligands have also been discussed.

摩尔电导率表明,所有配合物均为非电解质;红外光谱及核磁共振氢谱表明,对叔丁基杯[8]芳烃通过酚羟基的氧原子与稀土离子配位;硝酸根为双齿螯合配位;DMF和DMSO则分别通过羰基氧和亚砜基氧与稀土离子配位;配合物的荧光光谱表明,所有Tb的配合物具有较强的特征荧光,掺杂La~(3+)、Gd~(3+)、Y~(3+)离子对Tb~(3+)的荧光有较强的增强作用。

Mainly engaged in fine chemicals, chemical reagents precious metals, silver nitrate, the acid chloride, potassium cyanide-gold, Sulfite the salt, molecular Silver, silver, industrial ethanol, chemical reagents sulfuric acid, hydrochloric acid, nitric acid, ethanol and 95 percent ethanol and chemical reagents and other electronic products research and production.

主要从事精细化工,贵金属化学试剂,硝酸银,氯金酸,氰化亚金钾,亚硫酸金盐,分子银浆,银粉,工业无水乙醇,化学试剂硫酸,盐酸,硝酸,无水乙醇,95%乙醇等电子和化学试剂产品研究与生产。

In this paper, chemistry composition, fiber morphology and pulping property in Solidago canadensis were analyzed and determined preliminarily. The results showed that the content of holocellulose was 81.86%, the content of cellulose was 42.63%, the content of lignin was 18.86%, it is feasible for using Solidago canadensis pulping based on it's chemical composition. The ratio of fiber length to width in Solidago canadensis was 36.67, the average length of fiber was 440 μm, and the length of fiber was too short to pulping. The ratio of wall thickness of fiber cell to lumen diameter was 0.34, and it was smaller than that of other woody fiber. In this experiment, four different methods of pulping were as follows: kraft-AQ pulping Ⅰ, kraft-AQ pulping Ⅱ, alkaline pulping, alkaline sulfite adding AQ pulping, but it was difficult for lignin removal in Solidago canadensis.

通过对一枝黄花的化学组成、纤维形态以及制浆性能进行初步探索,结果表明:(1)加拿大一枝黄花的综纤维素含量为81.86%,硝酸乙醇纤维素含量42.63%,木素含量18.86%,由化学组成看,加拿大一枝黄花是比较适宜制浆造纸的;(2)加拿大一枝黄花纤维的长宽比为36.67,纤维平均长度为44μm,从纤维长度来看,加拿大一枝黄花的纤维较短,不适宜制浆,其纤维壁腔比0.34,和其它速生材相比较小;(3)采用4种碱法制浆方案,硫酸盐蒽醌法Ⅰ,硫酸盐蒽醌法Ⅱ、烧碱法、碱性亚钠+蒽醌法,结果显示,加拿大一枝黄花的木素非常难脱除。

Triphenyl phosphite provided prominent stabilization only when used in combination with other stabilizers. Good results have been obtained for both polyether-urethane and nitrate esters when using 2,6-di-t-butyl-4-methyl-phenol as stabilizer.

亚磷酸三苯酯单独使用时效果较差,但与其它种类的稳定剂混合使用能得到较好的效果。2,6-二叔丁基-4-甲基酚对硝酸酯和聚氨酯粘结剂均具有良好的稳定作用。

Heated in water bath,uranyl ion and nitrate radical adsorbed on resin are replaced into solution by sodium bisulfate,then are determined by titanous method and spectrophotometry,respectively.

在水浴加热条件下,用硫酸氢根将吸附在树脂上的铀酰离子和硝酸根离子置换到液相中,之后分别采用亚钛法、分光光度法进行测定。

The synergistic extraction of uranyl nitrate with binary system of 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 and tributyl phosphate or diphenyl sulfoxide, and ternary system of PMBP-DPSO-TBP were studied.

本文研究了1-苯基3-甲基4-苯甲酰吡唑酮-5与磷酸三丁酯或二苯亚砜的苯溶液从硝酸介质中对U的萃取,实验发现有显著的二元协萃效应,并测定了二元协萃络合物的组成为 UO_2A_2·TBP或 UO_2A_2·DPSO,求得二元协萃平衡常数为1gβ_(12)=3.58,1gβ_(13)=3.61。

Highly ordered mesoporous Zr-Ce-SBA-15 silica with hexagonal-platelet morphology was synthesized through a hydrothermal route by using pluronic P123 as a template, tetraethyl orthosilicate as a silica source, zirconyl chloride and cerous nitrate as a precursor. The main strategy of this method was to utilize the acidity self-generated from the hydrolysis of inorganic salts in the aqueous solutions, where no addition of mineral acids was necessary.

以P123为模板剂,正硅酸乙酯为硅源,氯化氧锆和硝酸亚铈为无机前驱盐,在不外加无机酸的条件下,利用无机前驱盐自身水解产生的弱酸性环境,通过水热合成路线一步合成了具有大的径轴比、短孔道、六方板状形貌的Zr-Ce-SBA-15介孔材料。

In medium of mixed sulphuric acid and phosphoric acid, with N-phenylated anthranilic acid as a tracer agent, the standard solution of ammonium ferrous sulphate is used to titrate chromium.

试样以硝酸、氢氟酸溶解,加高氯酸冒烟驱除硅和氟,并将铬氧化为六价,在硫磷混合酸介质中,以N-苯代邻氨基苯甲酸为指示剂,用硫酸亚铁铵标准溶液滴定铬。

Ammonia and nitrate, ferrous ion, sulfide, various gases and organic acids are sequentially formed, corresponding to the activities of aerobic and facultatively anaerobic bacteria, sulfate-reducing bacteria, and methane-producing bacteria with the development of reduction reactions.

在还原过程中,随着好氧细菌、兼性厌氧细菌、硫酸还原菌和甲烷菌的活动,相继形成氨、硝酸根离子、亚铁离子、硫化物、气体物质及有机酸。

The reaction between technetium and hydrazine in nit ric acid medium is studied by the titration of the concentration of hydrazine and pursuing the concentration of heptavalent technetium along with time.

利用溴代丁二酰亚胺滴定肼和跟踪Tc浓度随时间变化的方法,研究了硝酸介质中锝与肼的反应。

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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。