&&&alkaline 在 化学 分类中
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&&&&Preparation and Electrochemical Performance of Carbon Based Electrode in Alkaline Solution
&&&&碳基氧电极的制备及其在碱性溶液中的电化学性能研究
&&&&Reduction with Glucose or Invert Sugar in Alkaline Solution——A New Method for the Preparation of Several Aminophenolic Compounds
&&&&葡萄糖及转化糖在碱性溶液中的还原作用—某些氨基酚类化合物的新法制备
&&&&ADSORPTION OF SURFACE-ACTIVE SUBSTANCES AT THE DROPPING MERCURY ELECTRODE IN ALKALINE SOLUTIONS
&&&&碱性溶液中典型有机表面活性物质在滴汞电极/溶液界面上的吸附特性
&&&&Enzymological Studies on Amphioxus [Branchiostomabelcheri (Gray)]
Preliminary Studies on the Purification and the Kinetics of Slight Alkaline Protease from Amphioxus
&&&&文昌鱼的酶学研究——Ⅰ.偏碱性蛋白酶的分离提纯及其动力学的初步研究
&&&&Enzymological Studies on Amphtoxus Bronchtostoma belcheri(Gray)Ⅱ. Kinetics of Purified Alkaline Phosphalase
&&&&文昌鱼碱性磷酸酶的动力学初步研究
&&&&ALKALINE ALCOHOLYSIS OF VINYL ACETATE COPOLYMER
&&&&醋酸乙烯共聚物碱醇解研究
&&&&A STUDY ON KINETICS OF DEACETYLATION OF CHITIN IN HETEROGENEOUS ALKALINE SOLUTION
&&&&甲壳素碱介质非均相脱乙酰动力学研究
&&&&Studies on Kinetics of Deacetylation of Chitin in Heterogeneous Alkaline Solution
&&&&甲壳素碱介质非均相脱乙酰动力学研究
&&&&INTERACTION BETWEEN ALKALI, ALKALINE EARTH AND RARE EARTH METAL OXIDES IN CATALYTIC OXIDATIVE COUPLING OF METHANE Ⅰ.THE FUNCTION OF SURFACE LITHIUM IN Li-CATALYSTS
&&&&在甲烷氧化偶联反应中碱、碱土、稀土金属氧化物之间的相互作用
Ⅰ.含锂氧化物催化剂表面锂的作用
&&&&INTERACTION BETWEEN ALKALI,ALKALINE EARTH AND RARE EARTH METAL OXIDES IN CATALYTIC OXIDATIVE COUPLING OF METHANE Ⅱ.CATALYTIC PROPERTIES OF CaO DOPED La_2O_3 AND La_2O_3 DOPED CaO CATALYSTS
&&&&在甲烷氧化偶联反应中碱、碱土、稀土金属氧化物之间的相互作用
Ⅱ.掺CaO的La_2O_3和掺La_2O_3的CaO催化剂的催化性能
&&&&STUDIES ON IRON CATALYSTS OF AMMONIA SYNTHESIS PROMOTED BY ALKALINE METAL Ⅱ.A MODEL OF THE STRUCTURE OF IRON CLUSTER AS THE ACTIVE-CENTER OF NITROGEN
&&&&碱金属助催的合成氨铁催化剂的研究
Ⅱ.铁原子簇活化氮中心结构的模型
&&&&THE CHELATION OF 1-ACETAMIDO-PROPYLIDENE-1, 1-DIPHOSPHONIC ACID AND 1-PROPIONAMIDO-ETHYLIDENE-1,1-DIPHOSPHONIC ACID WITH ALKALINE EARTH METAL IONS
&&&&1-乙酰胺基丙叉-1,1-二膦酸和1-丙酰胺基乙叉-1,1-二膦酸与碱土金属离子的螯合作用
&&&&STUDIES ON THERMODYNAMICS OF CROWN COORDINATION COMPOUNDS Ⅳ. CALORIMETRIC TITRATION FOR COORDINATION REACTION OF 2, 3-BENZO-8, 11, 15-TRIMETHYL-18-CROWN-6 WITH ALKALI AND ALKALINE EARTH METAL IONS
&&&&冠醚配合物热力学性质的研究
Ⅳ.若干碱金属及碱土金属离子与2,3-苯并-8,11,15-三甲基-18-冠-6配位反应的量热滴定研究
&&&&Studies on Thermodynamics of Crown Coordination Compounds(V)--Calorimetric Titration for Coordination Reaction of 2,3-Benzo-11-Methy1-18-Crown-6 with Alkali and Alkaline Earth Metal Ions
&&&&冠醚配合物热力学性质的研究(Ⅴ)——碱金属及碱土金属离子与2,3-苯并-11-甲基-18-冠-6的配位反应的量热滴定研究
&&&&A Study on Transfer of Alkaline Earth Metal Ions Across Water-Nitrobenzene Interface Facilitated by Water Soluble Crown Ethers Using Cyclic Voltammetry
&&&&水—硝基苯界面上水溶性冠醚推动碱土金属离子转移的循环伏安法研究
查询“alkaline”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
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。&&&&&&&&&&&& 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。 An electrophotometric method has been worked out for the determination of magnesium in cast iron using titan yellow as indicator.Briefly,the method consists of dissolving the sample in dilute sulphuric acid,separating iron and other metals such as copper and nickel by electrolysis with mercury cathode and precipitating manganese from ammoniacal solution with ammonium persulfate.Ammonimn salt,silica and traces of aluminaare thenremoved. Finally,the prepared titan yellow reagent is added to the solutionand the... An electrophotometric method has been worked out for the determination of magnesium in cast iron using titan yellow as indicator.Briefly,the method consists of dissolving the sample in dilute sulphuric acid,separating iron and other metals such as copper and nickel by electrolysis with mercury cathode and precipitating manganese from ammoniacal solution with ammonium persulfate.Ammonimn salt,silica and traces of aluminaare thenremoved. Finally,the prepared titan yellow reagent is added to the solutionand the magnesium content determined from the electrophotometric reading.The time required for each determination is approximately 5 hours. The effect of interfering elements which are likely present in cast iron such as manganese, silicon,phosphorus, aluminum, copper, nickel and vanadium as well as ammonium ion and alkali and alkaline earth metals has been studied and discussed.It has been shown that manganese, silicon, aluminum,copper,nickel,iron and ammonium ions can be removed down to such low values as to cause no significant interference.Phosphorus under 0.4% has no appreciable effect.Vanadium is not separated in the present method,but fortunately it is usually present in insignificant amounts in ordinary cast iron.The effect of calcium is compensated by the introduction of saturated calcium sulphate solution before the titan yellow addition. Potassium and sodium have no appreciable effect when present in small amounts. The results obtained by the present method for the determination of magnesium in 11 known samples are good,the average difference being 0.002% in a range of 0.000% to 0.140% Mg.The data obtained by the present method are also in good agreement with those obtained by gravimetric methods On seven nodular iron samples made by the Metallurgical Division of our Institute.A detailed procedure for the determination of magnesium in cast iron has been suggested and included in this paper.In view of its rapidity and fair accuracy,the new photometric method might prove useful for the purpose of control in a nodular iron foundry.本文报告将地丹黄比色法应用於测定铸铁中之镁的试验结果.如将铁、锰、铝、矽等干扰物质预先除去,则镁的测定并无困难.依照本文所擬的方法分析,所需时间约为五小时,较重量法迅速得多. o-Nitrophenol,p-nitrophenol,4-nitro-2-methyl-phenol,2,6-dichloro-4-nitro-phenol,p-nitrosophenol,4-nitroso-2-methyl-phenol,α-nitroso-β-naphthol,p-hydroxy-azobenzenesulfonic acid and Orange Ⅱ were reduced satisfactorily to the corre-sponding aminophenolic compounds by glucose or invert sugar in alkaline solu-tion.m-Nitrophenol and 2,4-dinitrophenol gave negative results.Due to high yield and easy manipulation,this method may be used withadvantage in the laboratory preparation of aminophenolic compounds. (一)葡萄糖或转化糖在碱性溶液中能把硝基酚类、亚硝基酚类及对磺酸苯偶氮酚类化合物还原成为相应的氨基酚类化合物。得到正面结果的有:阾硝基苯酚、对硝基苯酚、4-硝基2-甲基苯酚、2,6-二氯-4-硝基苯酚、对亚硝基苯酚、4-亚硝基-2-甲基苯酚、α-亚硝基-β-萘酚、对磺酸苯偶氮苯酚、橙Ⅱ等九种化合物。结果可称满意。(二)间硝基苯酚与2,4-二硝基苯酚在上述条件下,得不到相应的氨基酚类化合物。&nbsp&&&&&相关查询
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中国学术期刊(光盘版)电子杂志社Synthese von disubstituierten Cyclopropa[c]pyranosiden aus 2,3-Epoxy-4-triflat-pyranosiden - Zaman - 1991 - European Journal of Organic Chemistry - Wiley Online Library
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Synthesis of Disubstituted Cyclopropa[c]pyranosides from 2,3-Epoxy-4-triflate-pyranosidesReaction of benzyl 2,3-anhydro-4-O-trifluoromethylsulfonyl-&-L-ribopyranoside (1) and benzyl 2,3-anhydro-4-O-trifluoromethylsulfonyl-&-D-ribopyranoside (4) with malonic acid derivatives yields, via the carbanions, the cyclopropa-monosaccharides 3 and 6. The ester residues attached to the cyclopropane moiety can be saponified to give the corresponding acids which can be coupled to new carbohydrate amino acid derivatives of type 9 which are of biological interest in different immunological assays.An Error Occurred Setting Your User Cookie
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