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甲醇
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  methanol
     the mobile phase was a mixture of 0.2mol/L citric acid∶ (methanol∶ acetonitrile=3∶ 1)=84∶ 16;
     流动相:柠檬酸(0.2mol/L)∶(甲醇∶乙腈=3∶1)(84∶16);
短句来源
     mobile phase: methanol∶acetomitrile∶0.05mol/L potassium dihydrogen phosphate solution-and 0.5mol/L citric acid solution(15∶30∶26∶4);
     流动相:甲醇∶乙腈∶0.05mol/L磷酸二氢钾溶液∶0.5mol/L柠檬酸溶液(15∶30∶26∶4);
短句来源
     The method was as follows:chromatography column:waters C_(18) (5 μm×3.9 mm×150 mm),mobile phase:methanol∶water∶phosphoric=20∶80∶0.1,flew velocity 1.0 mL/min,detection wavelength 275 nm,AUFS 0.01,temperature as same as room temperature.
     色谱柱:WatersC18柱 5μm×3.9mm×150mm ,流动相:甲醇∶水∶磷酸=20∶80∶0.1,流速为1.0mL/min,检测波长275nm,AUFS0.01,柱温为室温.
短句来源
     Method In HPLC procedure the determination was carried out on a YWG-G18 column(250 mm×4.6 mm,10 μm) ,the mobile phase was(methanol-acetonitrile) ∶(formic acid-water) =36.7∶63.3.Methanol∶acetonitrile=3∶1,and formic acid∶water=1∶29.The flow velocity was 1.0 mL/min and the detection wavelength was 286 nm.
     方法HPLC法,YWG-C18色谱柱(250mm×4.6mm,10μm),流动相:(甲醇-乙腈)∶(甲酸-水)=36.7∶63.3,其中甲醇∶乙腈=3∶1,甲酸∶水=1∶29,流速:1.0mL/min,检测波长为286nm。
短句来源
     The mobile phase is methanol∶0.01mol/L sodium acetate (pH 6.8)=35∶65(V/V).
     流动相:甲醇∶0.01mol/L乙酸钠溶液(pH6.8)=35∶65(V/V)。
短句来源
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  “甲醇∶”译为未确定词的双语例句
     Methods The Hypersil ODS_2(4.6 mm×250 mm,5 μm) column was used.
     方法采用Hypersil ODS2(4.6 mm×250mm,5μm)色谱柱,以甲醇∶0.025 mol.
短句来源
     MethodsHPLC was performed on Zorbax ODS(250 mm×4.6 mm,5 μm) with methanol-water-phosphoric acid(47∶53∶0.2) as mobile phase.
     方法采用Zorbax ODS(250 mm×4.6 mm,5μm)色谱柱,以甲醇∶水∶磷酸(47∶53∶0.2)为流动相,流速1.0 m l.
短句来源
     The chromatographic column, Nucleodur C18 column (4.6mm×250mm, 5μm), methanol-2% phosphoric acid solution(55∶45, v/v) mobile phase with 1.0mL/min flow rate, the detected wavelength (212nm), and the column temperature(25℃) were adopted.
     色谱柱为NucleodurC18柱(4.6mm×250mm,5μm),流动相为甲醇∶2%磷酸溶液(55∶45,v/v),流速1.0mL/min,检测波长212nm,柱温25℃。
短句来源
     mobile phase,methanol-water = 30∶70(v/v);
     流动相为甲醇∶水(v/v)=30∶70;
短句来源
     the mobile phase consisted of methanol-water (95∶5,V/V);
     甲醇∶水(95∶5,V/V)为流动相;
短句来源
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  相似匹配句对
     The mobile phase consisted of methanol-water(50∶50).
     甲醇-水(5050)为流动相;
短句来源
     The mobile phase was methanol-water(20∶80).
     流动相为甲醇-水(2080);
短句来源
     Let R: M ? M ?
     设RM(?)
短句来源
     ∶Xyl.
     Xyl.
短句来源
     METHANOL CARBONYLATION
     甲醇羰基化
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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