助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   sodium sulphite 的翻译结果: 查询用时:0.009秒
图标索引 在分类学科中查询
所有学科
有机化工
轻工业手工业
矿业工程
无机化工
电力工业
环境科学与资源利用
更多类别查询

图标索引 历史查询
 

sodium sulphite
相关语句
  亚硫酸钠
     The developed method was found suitable for the analysis of the mixture of Mn(Ⅶ)and Cr(Ⅵ) and the elemental analyses of Mn and Cr in the mixture of Mn(Ⅱ), Mn(Ⅶ), Cr(Ⅲ) and Cr(Ⅵ) after the reduction with sodium sulphite, too.
     Mn(Ⅶ)和Cr(Ⅵ)混合物及Mn(Ⅱ),Mn(Ⅶ),Cr(Ⅲ)和Cr(Ⅵ)混合物,可以用亚硫酸钠还原后再以本法测定。
短句来源
     A Study on the Colour Reaction of Ru with 5-Br-PADAP in the Presence of Sodium Sulphite
     在亚硫酸钠存在下钌与5-Br-PADAP的显色反应
短句来源
     The result indicated that the best method for preventing browning was scalding in boiling water for 10min, immersing in sodium sulphite solution at the concentration of 0. 7% , adding VC at the concentration of 0.7% or adding 0.5% sodium sulphite mixed with 0.3% VC.
     结果表明,防止姬松茸褐变有四种方法:沸水热烫10min,0.7%亚硫酸钠溶液浸泡,直接添加0.7%VC或添加0.5%亚硫酸钠与0.3%VC。
短句来源
     the molar ratio of maleic anhydride to sodium sulphite for sulfonation was 1∶1.05, the sulfonation temperature and time was 80 ℃ and 2 h respectively. The yield of product was 97.9%.
     顺酐 /亚硫酸钠 (摩尔比 ) =1∶1.0 5 ,磺化温度 80℃ ,时间 2h ,最终产物收率为 97.9%。
短句来源
     The KClO_3 is used as oxidant to pretreat silver concentrate, the effecting factors such as muriatic acid concentration, KClO_3 adding amount, the sodium sulphite concentration and the time on silver leaching rate are discussed.
     利用KClO3作氧化剂,对银精矿进行氧化预处理,考察了盐酸浓度、氧化剂加入量、亚硫酸钠浓度和浸出时间对银浸出率的影响。
短句来源
更多       
  “sodium sulphite”译为未确定词的双语例句
     The optimal formulation is: 0.5%calcium chloride+0.2%citric acid+0.25%ascorbic acid+0.3%sodium sulphite.
     当抑制效果最好时,各化学试剂的最佳组合为:0.5%氯化钙+0.2%柠檬酸+0.25%抗坏血酸+0.3%亚硫酸氢钠.
短句来源
     Cunninghamia lanceolata chips aged 10 years with basic density of 308 kg/m ̄3 were used in pilotscale chemimechanical pulping tests. The pulps with a level of chemical usage of 5%sodiurn hydroxide and14%sodium sulphite(on od wood)yielded in 88.4%at a given freeness level of 250 mL.
     对杉木进行制CMP中间试验。 杉木树龄10年,基本密度308kg/m ̄3,NaOH+Na_2SO_3用量为5%+14%,纸浆得率88.4%;
短句来源
     Producing Sodium Sulphite by Two-stage Series Jet Absorbing Process
     双级串联喷射吸收法生产Na_2SO_3的新工艺
短句来源
     The Study of the Influence by Applying Sodium Sulphite and Chemical Nutriment for Asparagus Lettuce's Output and the Law of Growth
     亚硫酸氢钠等物质对莴笋生长规律及产量影响的研究
短句来源
     THE STUDY OF THE MANUFACTURE OF SODIUM SULPHITE ANHYDROUS FROM SODIUM SULFATE ANHYDROUS
     由芒硝制亚硫酸钠的研究
短句来源
更多       
  相似匹配句对
     Use of Sodium Sulphite for Deinking ONP and OMG
     新闻纸和杂志纸用亚硫酸钠脱墨
短句来源
     Production of sodium sulphite from smelter off-gas
     用冶炼烟气生产亚硫酸钠
短句来源
     Cefazolin sodium
     唑啉头孢菌素钠盐
短句来源
     sodium citrate;
     柠檬酸钠;
短句来源
查询“sodium sulphite”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  sodium sulphite
Reduction was performed in a sodium sulphite-(5%) hydroquinone (1%) developer.
      
It was found that addition of an equal volume of 0.2% sodium sulphite or a mixture of sodium sulphite and sodium azide (both 0.2%) to expressed leaf sap improved serological detection of viruses and prevented non-specific reactions.
      
To avoid accumulation of dissolved oxygen in the culture medium, the exhaust gas is bubbled through a sodium sulphite solution before returning it to the reactor.
      
The electrochemical oxidation of sodium sulphite has been studied in aqueous sodium sulphate solution at two different graphite electrodes, one being of natural graphite (EC) and the other impregnated with phenol (ECK).
      
Seedlings were inoculated at the first true leaf stage with a known PRSV-W isolate in 0.02 M phosphate buffer (pH 7.0) plus sodium sulphite 0.01%.
      
更多          


Crystalline bovine insulin has been synthesized from the S-sulphonate derivatives of synthetic A-and natural B-chains of bovine insulin, and the A-chain derivative (Ⅰ) has been prepared from synthetic peptide intermediates. C-Terminal dodecapeptide (Ⅴ), directly prepared from asparagine, was decarbobenzoxylated and coupled with N-terminal nonapeptide hydrazide (Ⅳ) by the azide method to give heneicosapeptide (Ⅵ). The crude product without purification was treated with sodium-liquid ammonia as usual. The deblocked...

Crystalline bovine insulin has been synthesized from the S-sulphonate derivatives of synthetic A-and natural B-chains of bovine insulin, and the A-chain derivative (Ⅰ) has been prepared from synthetic peptide intermediates. C-Terminal dodecapeptide (Ⅴ), directly prepared from asparagine, was decarbobenzoxylated and coupled with N-terminal nonapeptide hydrazide (Ⅳ) by the azide method to give heneicosapeptide (Ⅵ). The crude product without purification was treated with sodium-liquid ammonia as usual. The deblocked product was partially purified by precipitation with acetic acid at pH 3.8. The precipitate was dissolved in 0.2 M Tris buffer (pH 8.1) and converted into the S-sulphonate by treatment with sodium sulphite and sodium tetrathionate. After dialysis followed by desalting with sephadex G25, the S-sulphonate product was further purified by paper-chromatography and the purified product (Ⅰ) obtained has [α]_D~(22)-68° (c 1.0, water) and behaved on paper chromatography [(R_f 0.25, n-BuOH: HOAc:H_2O(5:1:4)] and paper electrophoresis (migration distance 8.5 cm, 45v./cm, 90min., pH 1.9, HCOOH:HOAc:H_2O (3:2:15) (4M urea), Whatman 3 MM) as a homogeneous substance, just the same as the S-sulphonate of the A-chain of natural bovine insulin. N-Terminal amino acid determination further confirmed the homogeneity of the substance. Amino acid analysis of its acid hydrolysate gave following molecular ratios: Gly_(0.9)Ile_(0.9)Val_(2.0)Glu_(4.3)Ala_(0.9)Ser_(2.0)Leu_(2.0)Tyr_(1.9)Asp_(2.2) (cysteine being not determined). Synthetic S-sulphonate Ⅰ (5 mg) without purification by paper chromatography was directly reduced together with the S-sulphonate (Ⅱ) of the B-chain of natural bovine insulin (5 mg) in an acetate buffer (pH 5.0) by thioglycolic acid at 20°, and then acidified to pH 3.8. The precipitated product was suspended in glycine buffer (0.2 M, pH 10.6) and oxidized at 3—5° by air. The oxidation product was acidified to pH 5.0. The precipitate was dissolved in diluted ammonium hydroxide and lyophilized (8 mg as determined by Folin's method). It showed a biological activity of about 5—10% of natural bovine insulin (23.7 IU/mg) by the mouse convulsion test. The active oxidation product (68 mg) was extracted according to the known method with the upper phase of the solvent system sec-butanol-acetic acid-water (100: 1: 99), and the butanol layer was reextracted with the hypophase of the same system. The aqueous layer was finally lyophilized, and the product (4 mg of an activity of 60—70% of natural insulin) was crystallized from a mixture of acetone and aqueous citric acid solution containing zinc ions (1% citric acid, 16% acetone and 0.13% zinc acetate) in the same form as the natural hormone. After recrystallization from the same mixture, the synthetic crystalline product (Ⅲ) showed an insulin activity of 20—23 IU/mg (results from four repeated experiments) of about the same activity as the natural crystalline hormone. The recrystallized product (Fig. 4) appears homogeneous on paper electrophoresis and paper chromatography (Fig. 5 & 6) and behaves in a manner similar to natural bovine insulin. All above results and other supporting evidences showed that we have succeeded in the synthesis of the A-chain of bovine insulin and that the active crystalline product from the partial synthesis is crystalline bovine insulin.

本文报导了牛胰岛素A链的S-磺酸盐(Ⅰ)的合成以及自Ⅰ和天然B链S-磺酸盐(Ⅱ)组合为结晶牛胰岛素的半合成。十二肽酸Ⅴ脱N-保护基后,与九肽酰肼Ⅳ经迭氮化物法缩合得带保护基的A链(Ⅵ),粗产物经钠-液氨处理去保护基后,用乙酸缓冲液调至pH 3.8以除去部分杂质,然后进行S-磺酸化。经纸层析纯化的S-磺酸盐Ⅰ,其旋光率、纸电泳和纸层析的行为、氨基酸组成以及末端分析数据均与天然牛胰岛素A链S-磺酸盐的相符。产物Ⅰ与天然胰岛素B链S-磺酸盐经巯基乙酸还原和空气氧化后,得到的粗产物的生物活力相当于天然牛胰岛素活力的5—10%,经仲丁醇-乙酸柚提后,活力可提高5—10倍,抽提物再经含乙酸锌的丙酮-柠檬酸缓冲液纯化,可得结晶产物Ⅲ,其晶形与天然牛胰岛素相同,其活力(20—23国际单位/毫克)与后者相仿。上述结果及其他证据都证明我们已合成了牛胰岛素A链和所获得的半合成结晶产物就是结晶牛胰岛素。

This paper describes the research work and production practice of separation of a lead-zinc sulphide ore by electroflotation. The ore treated was a polymetallic sulphide ore.The ore contained 2% Pb,4% Zn and a certain amount of pyrite,the principal minerals being galena,sphalerite and pyrite.Galena amounted to 80% in minus 0.06 mm size fraction,dissoluting pyrite and sphalerite. The plant adopted a differential flotation flowsheet to treat this type of ore before the use of electroflotation.The metallurgical...

This paper describes the research work and production practice of separation of a lead-zinc sulphide ore by electroflotation. The ore treated was a polymetallic sulphide ore.The ore contained 2% Pb,4% Zn and a certain amount of pyrite,the principal minerals being galena,sphalerite and pyrite.Galena amounted to 80% in minus 0.06 mm size fraction,dissoluting pyrite and sphalerite. The plant adopted a differential flotation flowsheet to treat this type of ore before the use of electroflotation.The metallurgical results achieved were as follows: the grade of lead concentrate 45.64%(as pyrite contained a certain amount of gold and no separation was made,thus having a low grade of lead concentrate),lead recovery 82.81%;zinc concentrate assaying 59.98%,and recovery 81.88%. Flotation research by means of several types of electrodes showed that the lead- zinc complex mineral was separated successfully through the depression on zinc mineral,without the use of regulators,depressants and other reagents.The effect of copper-carbon electrode was better,zinc-carbon electrode being second.Electroflotation could also be used for separating copper-sulfur(pyrite)bulk concentrate.The bulk concentrate contained lead from 29.47% to 32.56%.The content of the lead concen- trate after separation was between 54.60% and 57.06%,the lead recovery being up to 97-98%. The flowsheet of differential flotation by use of zinc-carbon electrode at a plant has brought about good results in treating the above ore.The lead concentrate grade increased to 41.33%(no separation of pyrite;if separated,60% could be obtained), with a recovery of 87.29%;zinc concentrate containing 59.85% Zn,with a recovery of 83.28%. The above results show that the electroflotation method is effective in separating the lead-zinc mineral.The metallurgical results achieved are equal to or slightly hi- gher than those by using flotation reagents.Sodium carbonate,sodium sulphite,zinc sulphate and other reagents can be saved.The amounts of xanthate and copper su- lphate can be reduced by 35% and 60% respectively.The electroflotation technique is of benefit to a plant.

本文介绍了采用通电浮选实现铅锌硫化矿石的研究和实际应用结果。工业实践表明,应用通电浮选可使铅锌矿物有效分选,获得良好的技术经济效果。

Raime must be degummed before spinning.Obviously,it is the boiling process that is of greatimportance to the degumming quality.The effect of additional agent which is composed of sodiumpyrophosphate and sodium sulphite is investigated.By means of sodium pyrophesphate having astrong helation to the multivalence metal ions,such as Ca,Mg,Fe,and a good hydrolysis stabi-lity at high emperature,the authors have developed a rapid degumming process for raime,whichcan shorten production ime,increase production...

Raime must be degummed before spinning.Obviously,it is the boiling process that is of greatimportance to the degumming quality.The effect of additional agent which is composed of sodiumpyrophosphate and sodium sulphite is investigated.By means of sodium pyrophesphate having astrong helation to the multivalence metal ions,such as Ca,Mg,Fe,and a good hydrolysis stabi-lity at high emperature,the authors have developed a rapid degumming process for raime,whichcan shorten production ime,increase production and improve quality.

苧麻脱胶是这种纤维纺织加工中的关键工序,目前各厂采用的先浸硫酸液再用烧碱煮练的快速脱胶法,在精干麻的质量和生产时间方面还不能令人满意。各产麻地区都在选择碱煮助剂方面进行研究试验。本刊1981年第四期曾发表过广西南宁绢纺厂的脱胶研究报告,采用磷酸三钠加亚硫酸钠为助剂,实现常压快速煮练。同年第六期发表过湖南株州苧麻研究所的研究报告,认为用三聚磷酸钠可以提高脱胶质量和缩短煮练时间。现在湖北武汉纺研所又进一步试出用焦磷酸四钠为碱煮助剂,能在高温高压下取得良好效果.本文并分析了焦磷酸四钠作用的原理,计算了采用这种新工艺后的经济效果.

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关sodium sulphite的内容
在知识搜索中查有关sodium sulphite的内容
在数字搜索中查有关sodium sulphite的内容
在概念知识元中查有关sodium sulphite的内容
在学术趋势中查有关sodium sulphite的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社