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   ∶甲醇( 的翻译结果: 查询用时:0.504秒
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甲醇
相关语句
  methanol (
     mobile phase:5.0mmol/L EDTA∶acetonitrile∶methanol (30∶25∶60);
     流动相:5.0mmol/LEDTA∶乙腈∶甲醇(30∶25∶60);
短句来源
     Method The HPLC was conducted on a Kromasil ODS column(4.6mm×250mm,5μm) with 0.025mol/L phosphoric acid solution(adjust to pH 2.5 by triethylamin)∶methanol(50∶50) as mobile phase,detected at 278nm,flow rate 1.0 ml/min.
     方法采用高效液相色谱法,以十八烷基键合硅胶柱(K rom asil ODS柱,4.6mm×250mm,5μm)为色谱柱,0.025m ol/L的磷酸溶液(三乙胺调pH值2.5)∶甲醇(50∶50)为流动相,流速1.0m l/m in,检测波长278nm。
短句来源
     The conditions were ODS-C18(150mm×4.6mm,5μm)column,0.02mol·L~(-1) ammonium acetate:methanol(80∶20)mobile phase,flow rate 1mL.
     测定条件为:ODS-C18分析色谱柱(150mm×4.6mm,5μm),流动相0.02mol. L-1醋酸铵∶甲醇(80∶20),流速1mL.
短句来源
     Methods The HPLC system consisted of a YWG-C 18 colum (200 mm×4.6 mm,10 μm) and 0.05 mol/L borax(containing 85% H 3PO 4,pH 6.0) methanol (4∶6) as the mobile phase. The detection wavetength was 214 nm.
     方法 用YWG -C18柱 (2 0 0mm× 4 .6mm ,10 μm) 0 .0 5mol/L硼砂溶液 (用 85 %H3 PO4调 pH值至 6 .0 )∶甲醇 (4∶6 )为流动相 ,检测波长为 2 14nm。
短句来源
     The mobile phase consisted of 0.1M potassium dihydrogen phosphate∶acetonitrile∶methanol(82∶3∶15). The flow rate was 0.6ml/min. Ex was 240 nm and Em was 350 nm.
     0.1 M磷酸二氢钾(磷酸调pH值至2.51)∶乙腈∶甲醇(82∶3∶15)为流动相,流速0.6 ml/min,检测波长为Ex=240 nm,Em=350 nm。
短句来源
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  “∶甲醇(”译为未确定词的双语例句
     The mobile phase is 0.02 mol/L NaH2PO4-methanol(15∶85 V/V).
     流动相为0.02mol/L磷酸二氢钠∶甲醇(体积比为15∶85);
短句来源
     The mobile phase consisted of 15% acetonitrile, 25% of methanol and 60% of 0.05mol/L KH_2PO_4 buffer,which contained 0.5% triethylamine and was adjusted to pH 3.5 by phosphoric acid.
     流动相为0.05M磷酸二氢钾缓冲液(含0.5%三乙胺,用磷酸调pH3.5)∶乙腈∶甲醇(60∶15∶25);
短句来源
     The mobile phase is 0.02mol/L NaH2PO4-methanol(15∶85,v/v).
     流动相为0.02mol/L; 磷酸二氢钠∶甲醇(体积比为15∶85);
短句来源
     the mobile phase was 2% phosphoric acid metanol(95∶5);
     2 %磷酸∶甲醇 (95∶5)为流动相 ;
短句来源
     Zirchrom Kromasil ODS-1(5 μm,150 mm×4.6 mm i.d.) column was used. The optimized mobile phase was 20 mmol/L phosphate buffer (pH 6.0) containing 12 mmol/L β-cyclodextrin-methanol(70∶30, V/V) with the flow rate set at 0.8 mL/min and the temperature of 17℃.
     色谱条件为 :ZirchromKromasilODS 1(5 μm ,15 0mm× 4 .6mm)色谱柱 ,流动相为 2 0mmol/L磷酸盐缓冲液 (pH 6 .0 )含 12mmol/Lβ 环糊精∶甲醇 (70∶30 ,V/V) ,流速为 0 .8mL/min ,温度为 17℃。
短句来源
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  相似匹配句对
     water-methanol (60∶40) as mobile phase;
     水甲醇(6040)为流动相;
短句来源
     chloroform-methanol(10∶0.5);
     氯仿 -甲醇(10 0 0 .5) ;
短句来源
     The mobile phase composition was methanol-water(71∶29).
     流动相为甲醇-水(7129);
短句来源
     The mobile phase was composed of 80% methanol and 20% water.
     流动相:甲醇-水(8020);
短句来源
     Varian C 18 column, mobile phase: MeOH H 2O (15∶85);
     流动相 :甲醇 -水 (15 85 ) ;
短句来源
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  methanol (
Methanol extract showed more activity amongst all the solvent extracts, particularly remarkable activity recorded against gram-positive bacteria.
      
Water and methanol extracts prepared from the stem of C.
      
Berberine present in the water and methanol extract was determined by RP-HPLC.
      
Methanol extracts demonstrated better inhibitory effects on cultured L929 cells followed by purified berberine from cell suspension cultures and water extracts.
      
Only 15.33% of the cells was metabolically active at 200 μg/ml methanol extract while 23.57% of the cells was active at 200 μg/ml berberine.
      
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The anhydro ring in a-methyl 2:3-anhydro-4:6-benzylidene-D-allopyranosidehas been opened by the action of sodium benzylate to give 53% yield ofα-methyl 2-benzyl-4:6-benzylidene-D-altropyranoside and 9% of a-methyl 3-benzyl-4:6-benzylidene-D-glucopyranoside.After the removal of the benzy-lidene residue by acid hydrolysis,the position of attachment of the benzylgroup is determined by periodate oxidation.Catalytic hydrogenolysis of thebenzyl group gives the known α-methyl D-altroside and a-methyl D-glucosiderespectively...

The anhydro ring in a-methyl 2:3-anhydro-4:6-benzylidene-D-allopyranosidehas been opened by the action of sodium benzylate to give 53% yield ofα-methyl 2-benzyl-4:6-benzylidene-D-altropyranoside and 9% of a-methyl 3-benzyl-4:6-benzylidene-D-glucopyranoside.After the removal of the benzy-lidene residue by acid hydrolysis,the position of attachment of the benzylgroup is determined by periodate oxidation.Catalytic hydrogenolysis of thebenzyl group gives the known α-methyl D-altroside and a-methyl D-glucosiderespectively and their constitutions are thus proved.While an ethylene oxide ring in a sugar molecule can be opened by alkaline reagents,such as sodium hydroxide,sodium methoxide,ammonia,etc,the use of sodium benzylate has the advantage that one of the hydroxylgroups is protected after the scission by the benzyl group which can in turnbe removed by catalytic hydrogenation.

应用苯甲醇钠可以裂解α-甲基2∶3-内醚-4∶6-苯亚甲基-D-同侧醣氧六圜配醣物的醚环,生成53%的α-甲基2-苯甲基-4∶6-苯亚甲基-D-2-异侧醣氧六圜配醣物及9%的α-甲基3-苯甲基-4∶6-苯亚甲基-D-葡萄糖氧六圜配醣物。此两化合物的结构,应用水解除去苯亚甲基及接触氢解除去苯甲基后,证明是已知的α-甲基 D-2-异侧醣氧六圜配醣物,及α-甲基 D-葡萄糖氧六圜配醣物;苯甲基在醣分子中的衔接位置,则应用高碘酸钠氧化测定。

β-Benzyl 2:3-anhydro-4:6-benzylidene-D-alloside (IV)has been prepared from β-benzyl D-glucoside.Its behaviour towards sodium benzylate has been observed to follow the same course as the corresponding α-methyl analogue, for the expected product,β-benzyl 2-benzyl-4:6-benzylidene-D-altroside (V),is isolated.These observations demonstrate that the alteration of the glycosidic group as well as its configuration does not,at least in the case of the above compound studied,interfer with the course of formation of the...

β-Benzyl 2:3-anhydro-4:6-benzylidene-D-alloside (IV)has been prepared from β-benzyl D-glucoside.Its behaviour towards sodium benzylate has been observed to follow the same course as the corresponding α-methyl analogue, for the expected product,β-benzyl 2-benzyl-4:6-benzylidene-D-altroside (V),is isolated.These observations demonstrate that the alteration of the glycosidic group as well as its configuration does not,at least in the case of the above compound studied,interfer with the course of formation of the ethylene oxide ring.

β-苯甲基2:3-内醚-4:6-苯亚甲基-D-同侧醣配醣物(IV)由β-苯甲基D-葡萄糖配醣物經三步反应制得.它和苯甲醇钠的反应,与相应的α-甲基2:3-内醚-4:6-苯亚甲基-D-同侧醣配醣物相同,但析得的产物只有β-苯甲基2-苯甲基-4:6-苯亚甲基-D-2-异侧醣配醣物(V).以上的转化证明了配醣基的不同和构型的改变,至少在所研究的一个配醣物的结果来看,对于内醚环形成的构型是没有影响的.

In this article it is pointed out that the semi-empirical van der Waals' equation of state for gases is particularly unsatisfactory in the neighborhood of the critical point, as indicated by the fact that the experimental values of the critical ratio (?) seldom agree with the theoretical constant value 8/3. It is also noted that this τ value may serve as a satisfactory measure (at least to a first approximation) of the deviation of the law of corresponding states when applied to gases at high densities. We have...

In this article it is pointed out that the semi-empirical van der Waals' equation of state for gases is particularly unsatisfactory in the neighborhood of the critical point, as indicated by the fact that the experimental values of the critical ratio (?) seldom agree with the theoretical constant value 8/3. It is also noted that this τ value may serve as a satisfactory measure (at least to a first approximation) of the deviation of the law of corresponding states when applied to gases at high densities. We have therefore proposed in this communication a rather straightforward modification of the van der Waals' equation which leads to an empirical three-constant equation of state for gases involving this τ value as an adjustable parameter and thus requiring only critical data for the determination of the three constants. This equation is made to fit the p-V-T data at the critical point, but reduces itself to the simpler forms of the van der Waals' equation and the ideal gas equation for lower values of gas densities. Numerical calculations made for gases of widely different τ values show that this rather simple equation of state is fairly satisfactory even at high densities. The plausibility of using the τ value as an adjustable parameter both for the equation of state and for the law of corresponding states is also briefly discussed.

本文指出任何僅含兩個常數的氣態方程,在臨界點附近的缺點是特別顯著的。同時也指出,對應態定律應用到高密度氣體的偏差,可以相當滿意地用臨界係數(?)來衡量。因此我們建議將van der Waals方程,修改爲三常數的經驗方程,它的優點是這三個常數可以直接從氣體的臨界點數據計算出來;而且實例計算(包括極性很強和τ值很大的甲醇)說明它在相當大的温度和密度範圍內可以適用。將這個經驗式,寫成對比方程顯然含有臨界係數τ,就離開臨界點不太遠的氣體來說,這個函數關係可以相當满意地用本文方程總結出來。

 
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