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acidity
相关语句
  酸度
     Screening, Cloning and Expression of Genes Related to Apple Fruit Acidity
     苹果果实酸度相关基因的筛选、克隆及表达分析
短句来源
     STUDIES ON SILICIC ACID AND ITS SALTS——Ⅵ. Change of Acidity of Silicic Acid Solution during Polymerization.
     硅酸及其盐的研究 Ⅵ.硅酸的聚合和溶液酸度的变化
短句来源
     GROWTH OF BARLEY IN RELATION TO SOIL ACIDITY
     大麦生长与土壤酸度的关系
短句来源
     Calculation method of optimum acidity for the reaction of metal ions with organic reagents——application of programming calculator
     有机试剂与金属离子反应的最适酸度的计算方法——可编程序计算器的应用
短句来源
     INVESTIGATION OF STORAGE ACIDITY AND CONTAINERS OF ppb LEVEL CADMIUM SOLUTION
     ppb级镉溶液的贮存酸度和容器的研究
短句来源
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  酸性
     Studies of Solid-State MAS NMR on the Acidity in TS-1 Zeolite and Its Catalytic Oxidation of Styrene
     TS-1分子筛的酸性及其催化苯乙烯氧化反应的固体核磁研究
短句来源
     Synthesis and Characterization of Mesoporous Materials with Strong Acidity
     具有强酸性介孔材料的合成与表征
短句来源
     THE ACIDITY OF THERMAL DECOMPOSITION TYPE HZSM-5 ZEOLITE I.STERIC HINDRANCE
     热分解型HZSM-5沸石的酸性 Ⅰ.空间位障作用
短句来源
     STUDY OF THE SURFACE ACIDITY OF ZEOLITE BY TEMPERATURE PROGRAMMED DESORPTION (TPD) Ⅱ.TPD SPECTRA OF n-BUTYLAMINE ADSORBED ON NaY TYPE ZEOLITES WITH DIFFERENT EXCHANGE-PERCENTAGE OF Na~+ WITH Ca~(2+) AND NH_4~+
     程序升温脱附研究沸石的表面酸性 Ⅱ.在不同Ca~(2+),NH_4~+离子交换度的Y型沸石上正丁胺的程序升温脱附峰谱
短句来源
     THE ACIDITY OF THERMAL DECOMPOSITION TYPE HZSM-5 ZEOLITE Ⅱ.THE SOURCE OF ACIDITY AND DEHYDROXYLATION
     热分解型HZSM-5沸石的酸性 Ⅱ.酸性的来源和脱OH作用
短句来源
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     STUDY ON ACIDITY AND BASICITY OF Si-Fe MORDENITE ZEOLITE
     丝光型Si-Fe沸石表面碱性的研究
短句来源
     The Indirect Determination of Total Acidity of Beverage with Differential Pulse Voltammetry
     微分脉冲伏安法间接测定饮料总
短句来源
     Effect of Steam on Acidity,Surface Composition and Catalytic Activity of H-ZSM-5 Zeolite Catalyst
     水蒸汽对H-ZSM-5沸石催化剂性质、表面组成和催化性能的影响
短句来源
     THE MEASUREMENT OF SURFACE ACIDITY OF SOLID ACID CATALYST BY GAS CHROMATOGRAPHY
     气相色谱法测固体催化剂表面
短句来源
     Study on Ceramic Acidity and Basicity
     陶瓷碱的研究
短句来源
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  “acidity”译为未确定词的双语例句
     ANALYSIS OF GASTRIC ACIDITY IN 400 CASES OF SKIN DISEASES.
     400例皮肤病之胃液分析
短句来源
     IR STUDIES OF THE SURFACE OH GROUPS AND ACIDITY OF HZSM-5 ZEOLITE
     HZSM-5型沸石表面结构OH基及其酸性的红外研究
短句来源
     The Relationship Between the Acidity of Catalysts and Activity of the Isomerization of 1-Betene Over MoBiP/SiO_2 Catalysts
     MoBiP/SiO_2催化剂上丁烯-1异构化活性与催化剂酸性的关系
短句来源
     STUDY OF THE SURFACE ACIDITY AND ETHYLENE ADSORPTION ON MODIFIED HZSM-5
     改性HZSM-5的表面性质及其对烯烃的吸附作用
短句来源
     A study on infrared and ultra-violet spectra of the surface acidity of HY zeolite
     HY沸石表面酸性的红外和紫外光谱研究
短句来源
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  acidity
On the condition of weak acidity, the sensitive layer was prepared by electropolymerization of o-aminophenol on a gold electrode in the presence of the template (nicotine).
      
This effect of oxytocin may be mediated through the vagus and sympathetic nerve, and then lead to the reduction of gastric juice output and the depression of gastric acidity.
      
The solid acid catalysts showed more better adaptability than solid base catalysts when the oil has high acidity.
      
Modification of acidity of Mo-Fe/HZSM-5 zeolite via argon plasma treatment
      
The NH3-TPD characterization was conducted to confirm that the acidity of Mo-Fe/HZSM-5 zeolite could be selectively modified via the glow discharge plasma treatment.
      
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The effects of copper and zinc ionsupon the precipitation of barium sul-phate have been noted for a long time.However,the results published wereeither not systematic(3,4b,5,6)or obtained under conditions apart fromusual analytical practice(7,8).Thus,it seems necessary to investigate thissubject in more detail by the usual methods of determination.The presentcommunication reports(a)the effect of various amounts of cupric and zincions and(b)the influence of different acidities during precipitation in thepresence...

The effects of copper and zinc ionsupon the precipitation of barium sul-phate have been noted for a long time.However,the results published wereeither not systematic(3,4b,5,6)or obtained under conditions apart fromusual analytical practice(7,8).Thus,it seems necessary to investigate thissubject in more detail by the usual methods of determination.The presentcommunication reports(a)the effect of various amounts of cupric and zincions and(b)the influence of different acidities during precipitation in thepresence and absence of zinc ions.It is found that the interference of copper in the determination of sulphuras barium sulphate up to a ratio of 20:1 for Cu:S is negligible.The deviationsof the results obtained from theoretical values are all within ±2‰(see Table1),and do not show any regularity with the amount of copper added.The presence of zinc ions alone gives satisfactory results(slightly lowerthan theoretical values).As the amount of zinc ions in solution increases,thedeviations become somewhat wider(Table 2).The low results are presumedto be due to(1)the formation of soluble zinc-sulphate complex,which holdsa part of sulphate in solution,and/or(2)diverse ion effect.In the presenceof zinc ions,introducing hydrochloric acid up to 0.1 N before precipitationcauses essentially the same errors as if hydrochloric acid were absent(cf.Tables2 and 3),while at and beyond 0.2 N positive errors are obtained.A spectrographic examination of the precipitates reveals that zinc doescoprecipitate with barium sulphate,though only to a slight extent.The amountof zinc coprecipitated decreases with the increase of the acidity of the solutionfrom which the precipitate is thrown down.

本文报告铜及锌离子对于硫酸钡定硫的影响,找出了铜的影响几近于零,锌的影响亦微。锌离子能与硫酸钡共同沉淀。

The ethyl xanthate reaction for molybdenum is sensitive and is not interfered by tungsten, vanadium, chromium (Ⅲ) and uranium. Hence it is desirable to investigate it further as a method of determination. The results found are as follows:The acidity of the aqueous solution in which the molybdenum-xanthate complex forms should be adjusted to pH 1.11-1.56. And the complex is stable only for one minute in the media mentioned. The addition of acetone (2-25%) to the aqueous solution does not stabilize the complex...

The ethyl xanthate reaction for molybdenum is sensitive and is not interfered by tungsten, vanadium, chromium (Ⅲ) and uranium. Hence it is desirable to investigate it further as a method of determination. The results found are as follows:The acidity of the aqueous solution in which the molybdenum-xanthate complex forms should be adjusted to pH 1.11-1.56. And the complex is stable only for one minute in the media mentioned. The addition of acetone (2-25%) to the aqueous solution does not stabilize the complex to a notable degree.For extraction of the molybdenum-xanthate complex, ten organic solvents, namely petroleum ether, benzene, toluene, chloroform, carbon tetrachloride, chlorobenzene, diethyl ether, isoamyl alcohol, amyl acetate and isobutyl methyl ketone, are tested with respect to (a) the stability of the complex in these solvents (using optical density of the extracts as a measure) and (b) the effectiveness of various solvents in extraction. The complex is most stable in petroleum ether and toluene (at least for three days). The color of the complex in benzene is stable for fourteen minutes; in chloroform, ten minutes; in chlorobenzene, seven minutes and in carbon tetrachloride, six minutes. On the other hand, diethyl ether, isoamyl alcohol, amyl acetate and isobutyl methyl ketone are unsuitable for extracting the complex. Under similar conditions, various amounts of moly bdenum are extracted with different organic solvents, and the results obtained are plotted in Fig. 3. From the curves, it is found that among the organic solvents studied the following ranges of molybdenum content obey Beer's law: in chlorobenzene, 0-0.4 mg Mo; in benzene and in toluene, 0-0.3 mg Mo; and in chloroform and in carbon tetrachloride, 0-0.2 mg Mo. Petroleum ether can only be used with very low concentrations of molybdenum, and this is in accordance with Malowan's result.

本文證實溶液酸度对乙黃原酸钼錯合物的穩定度有影響。溶液的酸度最好調節在pH1.11—1.56之间。該钼錯合物生成后在水中僅穩定一分钟,故應在此期間以內用有機溶劑抽提。在丙酮-水溶液中,該钼錯合物亦不穩定。本文試驗了十種有機溶劑作抽提劑,比较了乙黄原酸钼錯合物在其中的穩定性和不同量钼的抽提效果。找出對該钼錯合物的穩定性而言,以石油醚和甲苯為最好。苯、三氯甲烷、四氯化碳和氯代苯次之(在一定的時間內可以使用),而乙醚、異戊醇、乙酸戊酯和異丁基乙酮,則均不適於作抽提之用。对抽提效果而言,氯代苯在钼含量0—0.4毫克範圍內遵循Beer定律;苯及甲苯次之;三氯甲烷或四氯化碳又次之;石油醚最差。根據上述,擬推荐甲苯作為最适宜之抽提劑。

From the perfusion experiments with isolated rabbit heart and vessels were obtained the follow- ing results: (1)Potassium antimony tartrate produced depression of the isolated rabbit heart,and this depressant action became more marked when the pH of the solution was raised from the original value of 5.4 to that of 7.2; (2)At the same pH levels,the cardiac action of the potassium salt was slightly stronger than that of the corresponding sodium salt; (3)The slight vase-dilator effect of potass- ium antimony tartrate...

From the perfusion experiments with isolated rabbit heart and vessels were obtained the follow- ing results: (1)Potassium antimony tartrate produced depression of the isolated rabbit heart,and this depressant action became more marked when the pH of the solution was raised from the original value of 5.4 to that of 7.2; (2)At the same pH levels,the cardiac action of the potassium salt was slightly stronger than that of the corresponding sodium salt; (3)The slight vase-dilator effect of potass- ium antimony tartrate on the isolated rabbit ear vessels could be entirely attributed to the weak acidity of its solution,as this could be reproduced by the tartrate buffer with the same pH,and this action disappeared when the pH of the drug solut- ion was raised to 7; (4)The isolated lung vessels responded to the drug with slight constriction,regardless of its pH be 4.8 or 7.

从离体器官的灌注实验得到下列结果:(1)酒石酸锑钾对离体兎心有抑制作用,将其pH 从5.4调整到7.2时,作用亦随以增加。(2)在相同 pH 时,酒石酸锑钾的心臓抑制作用较酒石酸锑钠略强。(3)酒石酸锑钾对离体兎耳血管的轻微扩张作用,系由于该药溶液的微酸性反应,当将药液 pH 调整至7后即无作用。(4)对于离体兎肺血管则不问 pH 为4.8或7,均产生轻微的血管收缩作用。

 
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