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yield
相关语句
  收率
    INFLUENCE OF SOME FACTORS ON THE QUANTUM YIELD OF HYDROGEN PHOTOGENERATION
    若干因素对催化光还原水产氢的量子收率的影响
短句来源
    A STUDY ON THE QUANTUM YIELD OF HYDROGEN GENERATION FOR SEVERAL CATALYTIC SYSTEMS FOR THE PHOTOREDUCTION OF WATER(Ⅱ)
    几种光还原水催化体系产氢量子收率的研究(Ⅱ)
短句来源
    OXIDATIVE COUPLING OF METHANE OVER ACCEPTOR-DOPED SrTiO_3: CORRELATION BETWEEN p-TYPE CONDUCTIVITY AND C_2 SELECTIVITY AND C_2 YIELD
    掺杂SrTiO_3体系上甲烷氧化偶联反应的研究 催化剂的p型导电性与C_2选择性和C_2收率的关系
短句来源
    Remarkable improvement in C_2 yield for the OCM reaction in a recycle-adsorption separation system
    循环-吸附分离反应工艺对提高甲烷氧化偶联反应C_2收率的作用
短句来源
    4-Tert-butylphenylboronic acid was synthesized with trimethyl borate and Grignard reagents which was prepared with 1-bromo-4-tert-butylbenzene and metal magnesium as raw materials under N2. An optimized process was obtained as follows: 1.5∶1molar ratio of 1-bromo-4-tert-butylbenzene to trimethyl borate,the temperature -20~-30℃,and the reaction time 140min. The final yield was 69.5%.
    以对叔丁基溴苯为原料,在氮气保护下,通过格氏反应合成了对叔丁基苯硼酸,考察了温度、反应时间和物料配比等因素对收率的影响,优化合成条件为:n(对叔丁基溴苯)∶n(硼酸三甲酯)=1∶1.5,反应温度为-20~-30℃,反应时间140min,总收率69.5%。
短句来源
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  产率
    IMPROVEMENT OF THE DETERMINATION OF QUANTUM YIELD IN PHOTOCHEMISTRY REACTION BY USING SIMULATIVE KINETIC MODEL ON COMPUTER
    计算机模拟动力学模型改进光化学反应量子产率的测定
短句来源
    A Study on the Polymeric Triplet Photosensitizers Ⅳ. The Problems of Spectrum, Quantum Yield of Phosphorescence, Photosensitization and Photostabilization of Polymeric Acetophenone and Its Derivatives
    高分子三重态敏化剂的研究——Ⅳ.高分子苯乙酮及其衍生物的光谱、磷光量子产率及光敏化光稳定问题的研究
短句来源
    The reaction of Methyl(naphtha-2-yl)diazoacetate with N-(1-(4-bromophenyl)vinyl)morpholine catalyzed by copper salts provided methyl 4-oxo-4-(4-bromophenyl)-2-(2-naphthyl)-butanoate: in good yield.
    主要论述重氮-β萘乙酸甲酯与N-(对溴苯乙烯基)-吗啉在铜盐催化下的反应,能够以较高的化学产率制备4-氧代-4-(4-溴苯基-)2-(2-萘)-丁酸甲酯.
短句来源
    The synthesis of 3,4-dihydropyrimidin-2(1H)-ones by cyclocondensation of aldehydes,β-ketoester and urea or thiourea at a molar ratio of 1∶1∶1.5 was studied,using HClO4 as the catalyst and glacial acetic acid as the solvent. The reaction time was 3.5 h,and the yield ranged from 75% to 98%.
    HClO4催化下,芳香醛、β-酮酸酯、脲或硫脲(物质的量比1∶1∶1.5)在冰醋酸中环化缩合,合成3,4-二氢嘧啶-2-酮衍生物,反应时间3.5 h,产率75%~98%。
短句来源
    The results showed that when the molar ratio of phenol to ceric ammonium nitrate was 1∶1.05,the yield of 2,4-dinitrophenol was 72% at a reaction temperature of 50 ℃ and a reaction time of 1.5 h.
    最佳反应条件为:苯酚与硝酸铈铵的物质的量比为1∶1.05,反应温度为50℃,反应时间为1.5 h,产率达72%。
短句来源
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  产额
    NEUTRON FLUENCE RATE,NEUTRON SPECTRUM AND NEUTRON YIELD MEASUREMENT WITH THE THRESHOLD DETECTOR ACTIVATION METHOD IN 50MeV/u ~(12)C-ION EXPERIMENTAL TARGET AREA
    用阈探测器活化法测量50MeV/u重离子实验靶区的中子注量率、能谱和中子产额
短句来源
    THE YIELD MEASUREMENT OF THE NEAR-TARGET PRODUCTS FROM THE REACTION OF THE INTERMEDIATE ENERGY ̄(12)C IONS WITH  ̄(209)Bi THICK TARGETS
    中能~(12)C离子同厚铋靶反应近靶产物的产额测定
短句来源
    Analysis of ~(238)Pu in Soil by Using ~(236)Pu as a Yield Tracer
    用~(236)Pu作产额示踪剂分析土壤中的~(238)Pu
短句来源
    Advances in research of sonochemical yield effect of multi-frequency ultrasonic irradiation
    多频超声辐照的声化学产额研究进展
短句来源
    Sonochemical yield promoted by ultrasound irradiation and its application
    超声辐照促进声化学产额的研究及应用
短句来源
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  “yield”译为未确定词的双语例句
    A Qnantitative Relationship between Molecular Structure and Chemical Reactivity Ⅴ——The Equations of the S-Curves for the Percentages of Yield of the Products in a Chemical Reaction
    分子结构与化学活性间的定量关系V——反应百分率S曲线的方程式
短句来源
    SOLVENT EFFECT ON THE FLUORESCENCE QUANTUM YIELD FOR Rh6G SOLUTIONS
    若丹明6G溶液体系的荧光量子效率
短句来源
    Investigation on the Mechanism of Increasing Luminescent Yield of the Rh-6G Agueous Solution by the Polyglycol Additives
    聚乙二醇增强Rh-6G水溶液发光能力的机制研究
短句来源
    STERESOSELECTIVE AND MILD METHOD FOR THE SYNTHESIS OF α-D-MANNOPYRANOSIDES AND RELATED OLIGOSACCHARIDES IN HIGH YIELD ̄1
    STERESOSELECTIVE AND MILD METHOD FOR THE SYNTHESIS OF α-D-MANNOPYRANOSIDES AND RELATED OLIGOSACCHARIDES IN HIGH YIELD ̄1
短句来源
    ENHANCED C_2 YIELD OF METHANE OXIDATIVE COUPLING BY MEANS OF A DOUBLE LAYERED CATALYST BED
    ENHANCED C_2 YIELD OF METHANE OXIDATIVE COUPLING BY MEANS OF A DOUBLE LAYERED CATALYST BED
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  yield
We also prove that some unimodular wavelets yield unconditional bases in Lp(?).
      
The same technique of proof is also applied to yield an existence result for A-dilation MRA subspace wavelets.
      
In most applications, it is this overcompleteness that is exploited to yield a decomposition that is more stable, more robust, or more compact than is possible using nonredundant systems.
      
This article shows that those abstract results yield an array of new implications for irregular Gabor frames.
      
The base-catalyzed condensation of thioureas (1-3a-i) with acetone was carried out in the presence of bromine to afford the corresponding 1-(isomeric methyl) benzoyl-3-aryl-4-methyl-imidazole-2-thiones (4-6a-i) in good yield.
      
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The extent of coprecipitation of copper with ferric hydroxide in the am- monium chloride-ammonia process has been studied. Pentavalent arsenic and antimony may be present up to 10 mg, and phosphate, 50 mg. Aluminum exerts little effect. It is found that this method yields satisfactory results. The amount of copper coprecipitated in the ferric hydroxide precipitate is negligible in practical analysis.

用氫氧化銨及氯化銨以分離銅與鐵,結果很好。氫氧化鐵中所留銅量,在實用分析上,已少至毋須考慮。用此法自多量鐵中分離少量銅份,可直接用此色法测定。五價砷與銻存在時,如不超過10毫克,或磷酸根不超過50毫克時,不影響銅與鐵的分離。鋁對分離更無影響。

p-Nitro-acetophenone was prepared by diazotizing p-amino-acetophenone in fluoroboric acid solution and replacing the diazonium fluoroborate group by the nitro group in presence of finely divided copper as catalyst. Yield 55-60%; m.p. 76-78℃. Recrystallization from alcohol gave a product of m.p. 80℃.

從乙醯苯胺、醋酸酐與氯化鋅作用,經水解後製得對胺基苯乙酮。在氟硼酸水溶液中重氮化之,再在亞硝酸鈉的水溶液中以銅粉為觸媒,將此重氮團置換成爲硝基,即得對硝基苯乙酮。

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。

 
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