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  calcium
    The Characteristic Effect of P-350 and TBP upon the Extraction of Lanthanum, Neodymium, Iron,Calcium and Copper by Naphthenic Acid
    P-350和TBP对环烷酸萃取(钅兰)钕铁性铜能的影响
短句来源
    Determination of Available Phosphorus in Ordinary Calcium Superphosphate with EDTA One-step Extraction Method
    测定普中有效磷的 EDTA 一步萃取法
短句来源
    Rapid Determination of Calcium Content in Additives and Petroleum Products
    添加剂及石油产品中含量的快速测定
短句来源
    The direct extraction-photometric determination of calcium in radium lead sulfate with azo-azohydroxyl BN
    偶氮-氧化偶氮BN萃取比色法直接测定硫酸铅镭中的
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    Atomic Absorption Determination of Major Concentration of Calcium、Magnecium、Lead and Zinc in Ores
    矿石中大量、镁、铅、锌的原子吸收光谱测定
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  ca
    Study on the preparation of fluorescently pure La_2O_3——the removal of Ca, Pb, Fe impurities by extraction with N 263
    荧光纯氧化镧制备的研究——N263萃取分离镧中的、铅、铁
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    Separation of alkaline-earth metals and determination of Ca and Mg in U-containing minerals by high speed IEC using YSG-SO_3Na as stationary phase
    用液相色谱固定相YSG-SO_3Na分离碱土金属及含铀矿石中、镁的快速测定
短句来源
    Simultaneous Determination of Fe Mn Ca Mg in the Manganese Ore and Gangue
    锰矿与脉石中铁锰镁同时测定
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    Ion Exchange Preconcentration-ICP-AES Determination of Mi cro Ca and Mg in Sodium Tungstate
    离子交换分离富集和ICP-AES测定钨酸钠中微量和镁
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    Studies on the CuAPO-5' and Cu_3(PO_4)_2/Ca_3(PO_4)_2 /AIPO_4-5 Catalysts
    磷酸铜铝分子筛催化剂和AIPO_4—5分子筛负载磷酸铜催化剂的研究
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  “钙”译为未确定词的双语例句
    Analysis of plate glass Ⅱ
    玻璃分析Ⅱ 、镁的半微量快速测定
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    A STUDY ON THE POLAROGRAPHY OF THE ALKALINE-EARTH METALS——Ⅰ.THE POLAROGRAPHIC ADSORPTIVE WAVE OF CALCIUM-ALIZARIN RED S AND THE APPLICATION
    碱土金属的极谱研究——Ⅰ.-茜素红 S 配合吸附波及其应用
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    A Study on the Polarography of the Alkaline-earth Metals Ⅳ. The Polarographic Adsorptive Wave of Bimetallic Ternary Complex of Barium-Calcium-Alizarin Complexone
    碱土金属的极谱研究 Ⅳ.钡--茜素配合剂双金属三元配合物吸附波
短句来源
    Determination of Alumina, Iron Oxide, Titania, Lime, Magnesia and Manganese Oxide in Silicious Refractories by ICP-AES Method
    ICP-AES法测定耐火材料中铁、铝、钛、、镁及锰
短句来源
    Determination of Cadmium, Calium and Magnesium Ions by Potentiometric Titration With Cadmium Ion Selective Electrode.
    镉离子电极电位滴定法测定、镉、镁
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  calcium
Study and Application of Electrochemical Behavior of Calcium-ARS on a Mercury Film Electrode
      
The peak current was proportional to the concentration of calcium in the range of 5.0×10-8-4.2×10-5 mol L-1.
      
This method was applied successfully to determining traces of calcium in blood serum.
      
The interaction of water molecules with the calcium and phosphate sites at the HAP-water interface was also studied.
      
The regeneration of exhausted solutions of electroless nickel plating wood veneer was realized using soluble calcium salt to precipitate and remove phosphite and then using fluoride to remove residual calcium ions from the solution.
      
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  ca
The 'active' compounds, which reduced growth of cancer cells to ca.
      
A sensitive complex absorptive wave of Ca-ARS was obtained by using differential pulse voltammetry when a mercury film glass carbon electrode was immersed in 0.1 mol L-1 KOH and 4.5×10-4 mol L-1 ARS solution.
      
Concentrations of N, Ca and Mg gradually increased and those of P and K gradually decreased in the fine roots of poplar during the period of decomposition.
      
A low concentration of AFM bonds can suppress the stepwise behavior considerably, in accordance with doping experiments on Ca3Co2O6.
      
Ultracytochemical localization of Ca2+ during the phloem ganglion development in Phyllostachys edulis
      
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Die Bestimmungsmethode für Magnesium mittels Titangelbs wird untersucht.Daraus ergibt sich folgendes:Obwohl durch Zusatz von Kalziumionen die Farbe des MagnesiumTitangelbs vertieft wird,gehorcht die Eichkurve dem Beerschen Gesetz zueinem geringeren Grade als diejenige ohne Kalziumzusatz.In Konzentrationen von weniger als 250 mg pro Liter,geben Bariumionenallein mit Titangelb keine Farbe,whrend in hheren Konzentrationen siedas Titangelb ausflocken.Für Magnesiumbestimmung kann 100-150 mg vonBarium pro Liter...

Die Bestimmungsmethode für Magnesium mittels Titangelbs wird untersucht.Daraus ergibt sich folgendes:Obwohl durch Zusatz von Kalziumionen die Farbe des MagnesiumTitangelbs vertieft wird,gehorcht die Eichkurve dem Beerschen Gesetz zueinem geringeren Grade als diejenige ohne Kalziumzusatz.In Konzentrationen von weniger als 250 mg pro Liter,geben Bariumionenallein mit Titangelb keine Farbe,whrend in hheren Konzentrationen siedas Titangelb ausflocken.Für Magnesiumbestimmung kann 100-150 mg vonBarium pro Liter den Kalziumzusatz ersetzen,doch ergibt sich hieraus keinVorteil.Für den Einfluss von Barium-und Molybdationen(mit Zusatz vonKalziumsalz)wird es gefunden,dass Barium bis zu 600 mg pro Liter undMolybdat bis zu 1300 mg pro Liter die Methode kaum beeinlussen.Ingrsseren Konzentrationen wird die Farbe des Magnesium-Titangelbs durchBariumionen verstrkt,whrend sie durch Molybdationen geschwcht wird.Die Sohwchung der Farbe des Magnesium-Titangelbs durch Molybdationenkann man dadurch erklren,dass Molydationen die Kalziumionen dem Systementziehen,weil Kalziummolybdat schwer lslich ist.

1.本文比较了有或无存在时地丹黄定镁的不同之点。2.关于钡离子影响镁和地丹黄沉淀色料之颜色的深浅程度,本文作一定量的探讨。3.本文并报告钡离子及钼酸根离子对地丹黄定镁法(含溶液)的影响。

The volumetric method of determination of bismuth as proposed by Malaprade is based upon the fact that bismuth hydroxide can be converted into the trithiosulfatobismuth complex by first adding a large excess of sodium thiosulfate and then adding carefully dilute nitric acid to dissolve the hydroxide with methyl red as the indicator for control. The complex can be titrated with standard sodium or potassium hydroxide solution using phenolphthalein as an indicator. The chief reactions are: Bi(OH)_3+3S_2O_3"+SH~(?)→[Bi(S_2O_3)_3]'''+3H_2O...

The volumetric method of determination of bismuth as proposed by Malaprade is based upon the fact that bismuth hydroxide can be converted into the trithiosulfatobismuth complex by first adding a large excess of sodium thiosulfate and then adding carefully dilute nitric acid to dissolve the hydroxide with methyl red as the indicator for control. The complex can be titrated with standard sodium or potassium hydroxide solution using phenolphthalein as an indicator. The chief reactions are: Bi(OH)_3+3S_2O_3"+SH~(?)→[Bi(S_2O_3)_3]'''+3H_2O (1) 2[Bi(S_2O__)_3]'''+5OH'+NO_3'→(BiO)_2OH·NO_3+6S_2O_3''+2H_2O (2)The quantity of bismuth can be calculated from the consumed alkali according to equation (2).We have found that for samples of 0.1—0.17 gram of bismuth with the addition of ten to fifteen grams of sodium thiosulfate, the relative error of determination is ±0.5%, agreeing with the result of Malaprade. The following ions present up to the amount indicated respectively do not interfere with the determination of 0.1 gram of bismuth:(1)Pb (II), 80mg; Cr(III), 25mg in the presence of 15 grams of sodium thiosulfate;(2)Cu (II) and Co (II), 100 mg; Fe (III), 80 mg; Zn (II), 40 mg; Ca (II), 200 mg; Ag (I), 30 mg; Mo (VI), 30 mg in the presence of 10 grams of sodium thiosulfate;(3) Ni (II), 40mg in the presence of 10 grams of sodium thiosulfate, or 40—60 mg in the presence of 15 grams of sodium thiosulfate;(4)Cd and Mn.On the other hand, As (III, V), Cl' and SO_4" ions do interfere. The latter two anions form insoluble oxy-salts in dilute nitric acid. Accordingly any arsenic present in bismuth samples should be removed previously. As to tin, antimony and tungsten which usually occur in bismuth ores, they can be removed in the course of opening with concentrated nitric acid, which converts them respectively into the insoluble rnetastannic, meta-antimonic and tungstic acids.The total time for a complete titration is about half an hour, being five to ten times shorter than that required by the gravimetric methods. his rapid method is probably suitable for the determination of bismuth in ores etc.

用标准碱滴定硫代硫酸铋络合物的方法既属快速(约半小时),而又相当准确(铋含量在0.1—0.17克时,相对误差在±0.5%以下)。在0.1克的铋样中,曾经分别加入银、铅、铜、砷、铁、铬、锌、钴、、钼等离子进行试验,只有砷发生干扰。溶液中不能有氯离子与硫酸根。

A brief study on the effect of addition of cumene hydroperoxide (II, CHP, in text) without or with simultaneous addition of an alkaline additive (sodium carbonate or calcium oxide) on the reduction of the induction period in the autoxidation of cumene (I) showed that the heterogeniety inherent in the latter systems resulted in poor reproducibility. Sodiumsalt of cumene hydroperoxide (III) was introduced as an oilsoluble system in which the initiator and the alkaline additive are in combination. Experiments with...

A brief study on the effect of addition of cumene hydroperoxide (II, CHP, in text) without or with simultaneous addition of an alkaline additive (sodium carbonate or calcium oxide) on the reduction of the induction period in the autoxidation of cumene (I) showed that the heterogeniety inherent in the latter systems resulted in poor reproducibility. Sodiumsalt of cumene hydroperoxide (III) was introduced as an oilsoluble system in which the initiator and the alkaline additive are in combination. Experiments with various amounts of III at 110° 120°and 130°that the induction period and the autocatalysis were either completely or practically eliminated. The reproducibility of the experiments accompanying the use of III was extremely good. The rate of accumulation of II was 16±0.7% (wt.)/hr. at. 130° at 120° the rate was 8.7%/hr. except when the amount of III was 3.33% (7.3%/hr.); at 110° the rate varies more pronouncedly with the amount of III (3.0-5.0%/hr.).

初步观察了在异丙苯(Ⅰ)自动氧化为异丙苯过氧化氢(Ⅱ)中仅加入异丙苯过氧化氢作为引发剂及同时加入硷性添加剂碳酸钠或氧化对缩短或消除诱导期及对Ⅱ累积速率的影响。由于在上述体系中固体硷性剂的悬浮性使反应不易重复,引用了油溶性的异丙苯过氧化氢钠盐(Ⅲ)作为引发剂-硷性剂二者合而为一的体系,用不同加入量,在110°、120°及130℃进行试验,发现诱导期及自动催化期完全或基本上消除,反应极易重复。Ⅱ的累积较在前述情况下的为佳。 在用密闭系统吸氧法进一步研究有Ⅲ存在下的诱导期消失情况时,发现在氧化开始最初几分钟内有快速吸氧现象。认为这是硷与Ⅱ作用引发了氧化链。仅仅加入氢氧化钠也同样产生起始快速吸氧现象,这应是Ⅰ中存在的微量Ⅱ所引起的。在使用Ⅲ情况下的氧化效率求出为92—97%。 迸行了在110°的Ⅰ自动氧化中加入硬酯酸钴的催化效应的研究,消除了诱导期。虽然起始累积速率提高了,但是由于钴盐对Ⅱ的分解,Ⅱ的累积程度不高。同时加入少量Ⅱ并不更加提高起始的累积速率,显然Ⅰ中已有的微量Ⅱ已足够担负与钴盐作用引起反应链。同时加入钴盐和Ⅲ大大提高了Ⅱ的累积速率,相当于仅加Ⅱ或Ⅲ时在130°的累积速率。累积程度亦可达...

初步观察了在异丙苯(Ⅰ)自动氧化为异丙苯过氧化氢(Ⅱ)中仅加入异丙苯过氧化氢作为引发剂及同时加入硷性添加剂碳酸钠或氧化对缩短或消除诱导期及对Ⅱ累积速率的影响。由于在上述体系中固体硷性剂的悬浮性使反应不易重复,引用了油溶性的异丙苯过氧化氢钠盐(Ⅲ)作为引发剂-硷性剂二者合而为一的体系,用不同加入量,在110°、120°及130℃进行试验,发现诱导期及自动催化期完全或基本上消除,反应极易重复。Ⅱ的累积较在前述情况下的为佳。 在用密闭系统吸氧法进一步研究有Ⅲ存在下的诱导期消失情况时,发现在氧化开始最初几分钟内有快速吸氧现象。认为这是硷与Ⅱ作用引发了氧化链。仅仅加入氢氧化钠也同样产生起始快速吸氧现象,这应是Ⅰ中存在的微量Ⅱ所引起的。在使用Ⅲ情况下的氧化效率求出为92—97%。 迸行了在110°的Ⅰ自动氧化中加入硬酯酸钴的催化效应的研究,消除了诱导期。虽然起始累积速率提高了,但是由于钴盐对Ⅱ的分解,Ⅱ的累积程度不高。同时加入少量Ⅱ并不更加提高起始的累积速率,显然Ⅰ中已有的微量Ⅱ已足够担负与钴盐作用引起反应链。同时加入钴盐和Ⅲ大大提高了Ⅱ的累积速率,相当于仅加Ⅱ或Ⅲ时在130°的累积速率。累积程度亦可达40%。可供工业上考虑采用。

 
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