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mn
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    DETERMINATION OF CONTENTS OF Mn, Fe, Cu, Co AND Ni IN MANGANESE NODULE BY OSCILLOPOLARAPHIC ANALYTICAL METHOD IN INVESTIGATION
    大洋结核调查中Mn、Fe、Cu、Co、Ni品位的示波极谱测定
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    Direct Determination of Mn in Seawater by Graphite Furnace Atomic Absorption Spectrometry
    塞曼石墨炉原子吸收法直接测定海水
短句来源
    Research of an Equipment for Detecting Fe and Mn in Water of the Natural Beverage
    天然饮料用水除铁设备的研究
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    DETERMINATION OF TRACE Cu,Pb, Zn, Cd, Fe AND Mn IN SEAWATER BY ION-EXCHANGE AAS
    离子交换—原子吸收光谱法测定海水中痕量铜、铅、锌、镉、铁、
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    TREATMENT OF Mn( Ⅱ ) AND NH3-N CONTAINING WASTE WATER IN ELECTROLYTIC MANGANESE PRODUCTION
    电解废水中(Mn~(2+))和氨-氮(NH_3-N)的处理
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    THE GALVANIC CORROSION OF 16Mn STEEL-101 STEEL IN SEA-WATER
    16Mn钢与101钢在海水中的接触腐蚀
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    The Comparative Study of Removing Ni(Ⅱ),Mn(Ⅶ):n Water by Using the Coal S1ag and Active Carbon
    煤渣和活性炭去除水中Ni(Ⅱ)、Mn(Ⅶ)的对比研究
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    SIMULTANEOUS DETERMINATION OF ~(54)Mn,~(59)Fe,~(60)Co AND~(65)Zn IN THE MARINE SAMPLES USING γ SPECTROMETER
    海水、海洋生物和沉积物中 ~(54)Mn,~(59)Fe,~(60)Co,~(65)Zn的x谱仪联合测定
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    THE DETERMINATION OF ELEMENTS Ca, Mg, Na, Fe, Mn IN THE CARBONATE FRACTION OF MARINE SEDIMENTS BY ATOMIC ABSORPTION SPECTROPHOTOMETRY
    原子吸收法测定海洋沉积物碳酸盐组分中的Ca,Mg,Na,Fe,Mn
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    Study on the Self-purification of COD_(Mn) in Stream Water
    山溪小河中COD_(Mn)的自净作用研究
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  mn
In this note it is shown that a necessary and sufficient condition for the existence of a P3-factorization of complete multipartite graph λKmn is (1) m≥3, (2) mn≡0 (mod 3) and (3) λ(m-1)n≡0(mod 4).
      
Let Sn be the symmetric group, gi+=(123i), gi-=(li32) and Mn+={gi+∶4≤i≤n}, then Mn+ is a minimal generating set of Sn, where n≥5.
      
It is proved that Cayley graph Cay (Sn, Mn+∩Mn-) is Hamiltonian and edge symmetric.
      
Let Mn be a closed spacelike submanifold isometrically immersed in de Sitter space Spn+p (c).
      
Denote by R, H and S the normalized scalar curvature, the mean curvature and the square of the length of the second fundamental form of Mn, respectively.
      
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A porous ceramic honeycomb is coated with active Al2O3, On this ceramic honeycomb several active ingredients are supported forming a multicomponent catalyst with the composition of La, Ba, Cu, Ni, Mn and trace of Pd. The activity of this catalyst has been tested in the laboratory and by the engine stand. The conversions of CO and HC by using of engine stand are 90% and 80% respectively, and at souitable condition of A/F ratio the catalysts can reduce CO, HC and NOx simultaneously.

由多孔陶瓷制成蜂窝体,再浸上活性氧化铝。用此蜂窝状载体制成多组分催化剂,其活性组分为La,Ba,Cu,Ni,Mn以及微量的Pd。对该催化剂进行了实验室及台架试验。通过台架试验,对CO,HC的净化率分别为90%和80%,在适当的空燃比条件下,可以同时净化CO、HC和NOx。

This article describes a new process for the extraction of scandium. The residue from the leaching of wolframite by alkaline process is leached with hydrochloric acid. Humic acid is added to the leach liquor at 25℃ and pH=5, the amount of humic acid is twenty times that of scandium, scandium can be selectively precipitated from the leach liquor containing large amounts of Fe、Mn and other impurities. The precipitate is washed with dilute hydrochloric acid in order to separate scandium effectively from the...

This article describes a new process for the extraction of scandium. The residue from the leaching of wolframite by alkaline process is leached with hydrochloric acid. Humic acid is added to the leach liquor at 25℃ and pH=5, the amount of humic acid is twenty times that of scandium, scandium can be selectively precipitated from the leach liquor containing large amounts of Fe、Mn and other impurities. The precipitate is washed with dilute hydrochloric acid in order to separate scandium effectively from the humic acid. The ratio of Sc∶Fe∶Mn can be changed from 1∶349∶67 in the leach liquor to 1∶18∶0.69 in the washed precipitate. The recovery of scandium is about 90%.

用碱法从黑钨矿中提取钨后的残渣(钨渣),此残渣经盐酸浸出,将腐植酸加入到钨渣浸出液中,在pH=5、25℃和腐植酸:钪量=20:1条件下,可将钪从含有大量铁锰等杂质的溶液中有选择性的沉淀出来。然后用稀盐酸洗涤沉淀,可有效的将钪与腐植酸分离。钪、铁、锰的含量由原来钨渣浸出液中的1:349:67下降为1:18:0.68。钪的回收率达90%。腐植酸作为钪的一种新沉淀剂是有效的。

Standard reference material,HGHR-781,is a syntheticgrain ash solution in 4N HNO_3.HGHR-781 contains 12 kinds of radio-nuclides and elements,i.e., ~(144)Ce,~(60)Co,~(137)Cs,~(210)pb,~(210)Po,~(230)pu,~(220)Ra,~(106)Ru,~(90)Sr,~(65)Zn,Th and U,and 23 kinds of stable elements,i.e.,Al,As,Ba,Ca,Ca,Cl,Co,Cr,Cu,F,Fe,Hg,K,Li,Mg,Mn,Na,Ni,P,Pb,Se,Sr and Zn.In the analysis of environmental radioacti-vity,HGHR-781 can be used for following purposes:(i)to establish,improve and compare analytical methods(ii)to preserve,transfer...

Standard reference material,HGHR-781,is a syntheticgrain ash solution in 4N HNO_3.HGHR-781 contains 12 kinds of radio-nuclides and elements,i.e., ~(144)Ce,~(60)Co,~(137)Cs,~(210)pb,~(210)Po,~(230)pu,~(220)Ra,~(106)Ru,~(90)Sr,~(65)Zn,Th and U,and 23 kinds of stable elements,i.e.,Al,As,Ba,Ca,Ca,Cl,Co,Cr,Cu,F,Fe,Hg,K,Li,Mg,Mn,Na,Ni,P,Pb,Se,Sr and Zn.In the analysis of environmental radioacti-vity,HGHR-781 can be used for following purposes:(i)to establish,improve and compare analytical methods(ii)to preserve,transfer andunify analytical values and(iii)to keep analytical quality.

标准参考物质 HGHR-781系合成谷物灰4N HNO_3溶液。含有~(144)Ce、~(60)Co、~(137)Cs、~(210)Pb、~(210)Po、~(239)Pu、~(226)Ra、~(106)Ru、~(90)Sr、~(65)Zn、Th、U 共12种放射性核素(元素)和Al、As、Ba、Ca、Cd、Cl、Co、Cr、Cu、F、Fe、Hg、K、Li、Mg、Mn、Na、Ni、P、Pb、Se、Sr、Zn 共23种稳定性元素。在环境放射性分析中,HGHR-781可用于分析方法的建立、改进和比对,分析量值的保存、传递和统一,以及分析质量的控制。

 
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