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酯化     
相关语句
  esterification
     Studies on SO_4~(2-)-MoO_3-ZrO_2 Solid Superacid Catalyst and Pervaporation Membrane Seperation Esterification
     SO_4~(2-)-MoO_3-ZrO_2固体超强酸催化剂以及渗透汽化膜分离酯化反应的研究
短句来源
     MECHANISM OF HYDROGEN ION CATALYSIS IN ESTERIFICATION. Ⅵ. STUDIES ON THE KINETICS OF POLYESTERIFICATION REACTIONS OF 1-HYDROXYPENTADECANOIC ACID-15.
     酯化反应的氢离子催化机构——Ⅳ 1—羟基十五碳酸的聚酯反应动力学
短句来源
     THE RELATIONSHIP BETWEEN THE ESTERIFICATION REACTION CONSTANT AND THE PHYSICAL PARAMETERS OF THE METAL ATOM OF THE CATALYZER
     酯化反应常数和催化剂金属离子物理参数的关系
短句来源
     STUDY OF ESTERIFICATION REACTIONS CATALYZED BY HYDRATED SULPHATE SALTS Ⅰ. DETERMINATION OF THE ORDER AND THE ACTIVATION ENERGY OF REACTION AND THE ACTIVITY OF CATALYSTS
     硫酸盐水合物催化下的酯化反应 Ⅰ.反应级数、活化能及催化剂活性的测定
短句来源
     STUDY OF ESTERIFICATION REACTIONS CATALYZED BY HYDRATED SULPHATE SALTS Ⅱ. A CATALYZING LINEAR FREE-ENERGY RELATIONSHIP
     硫酸盐水合物催化下的酯化反应 Ⅱ.催化线性自由能方程
短句来源
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  esterify
     The experiments show,when the ratio of fly ash to zirconium is 3∶1,the concentration of H2SO4 solution is 0.50 mol/L,the calcinating temperature is 550 ℃,the esterify efficiency of the FZS-G type fly ash compound solid acid catalyst which prepared in above conditions can reach to 98.3% when used in esterifiable reaction.
     实验结果表明:粉/锆比为3∶1、H2SO4浸渍浓度为0.50mol/L、焙烧温度在550℃时制备的催化剂,应用于酯化反应中酯化率可达98.3%。
短句来源
     The experiment showed that the main fatty acids in the cell membrane——palmitic acid(16∶0),palmitoleic acid(16∶1),setearic acid(18∶0),oleic acid(18∶1),linoleic acid(18∶2) and eleosetearic acid(18∶3) could be separated completely by using the method of KOH CH 3OH BF 3 esterify ,silica gel decolorition and the programming calefaction.
     采用 KOH-CH3OH-BF3酯化、硅胶脱色和程序升温的方法 ,将细胞膜中的主要脂肪酸——棕榈酸 ( 16∶ 0 )、棕榈油酸 ( 16∶ 1)、硬脂酸( 18∶ 0 )、油酸 ( 18∶ 1)、亚油酸 ( 18∶ 2 )和亚麻酸 ( 18∶ 3 )完全分离 . 运用归一化方法得出了上述各种脂肪酸含量 .
短句来源
     The best ways to prepare copolyester was acid/glycol=1:1.6,esterify temperature 190-220℃ 4h, condensation polymerization temperature 250-260℃,3h by means of investigating the influence of reaction press and reaction time to polyester viscosity.
     通过对反应时间,反应压力的研究发现:酸醇比为1:1.6,酯化反应温度为190-220℃,酯化率达到95%时即为酯化结束,通常酯化时间为4h,缩聚反应温度为250-260℃,缩聚反应时间控制在3.5h,在这种条件下合成出的共聚酯特性粘度较大。
短句来源
     The esterify yield is up to 98.2% under the optimum conditions: propionic acid 0.15 mol, alcohol acid mole's ratio 1.2∶1, consumption of catalyst 0.25% (molar percent of propionic acid), reaction time for 3.0 h, 85~90 ℃, 5 mL cyclohexane. Copper methanesulfonate is used repeatedly for 8 times without obvious loss of activity and with the esterify yield still over 93.1%.
     找到了较佳的反应条件:丙酸用量为0.15mol,醇酸摩尔比为1.2∶1,催化剂用量为0.25%(以丙酸的摩尔分数计),反应时间为3h,反应温度为85~90℃,环己烷用量为5mL(作为带水剂),在此条件下酯化率可达98.2%。
短句来源
     Glycol stearate was synthesized with the catalyst of p-aminobenzenesulfonic acid,the esterify reaction time,the alcohol/acid mole ratio,reaction temperature,the amount of the catalyst effect on the yield of product were tested,then obtain the optimum reaction condition:n(alcohol)∶n(acid)=1.3∶1,the amount of catalyst is 2.0 g,reaction temperature is 135 ℃,reaction time is 3 h,the yield may up to 92.6%.
     研究了酯化反应时间、醇酸摩尔比、反应温度、催化剂用量等对产品收率的影响。 结果表明,最佳反应条件为:n(醇)∶n(酸)=1.3∶1,催化剂的用量为2.0 g,控温135℃,反应时间为3 h,酯收率可达92.6%。
短句来源
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  esterifying
     Method KOH-CH_3OH solution as the esterifying agent,HP-FFAP 30m×0.32 mm×0.25 μm capillary column was used to separate the fatty acids and FID for quantitative determination.
     方法采用KOH-CH3OH甲酯化衍生,利用HP-FFAP 30 m×0.32 mm×0.25μm毛细管柱分离,FID检测。
短句来源
     the esterifying time: 3.5~4.0 h.
     酯化时间 :3 .5~ 4 .0 h。
短句来源
     As for the esterifying enzyme of Mm-4 strain,at the optimum conditions (2% alcohol and 0. 25% caproic acid,pH 4. 0,30℃ ),enzyme activity reached its highest of 220 u/g.
     Mm—4菌株的酯化酶在适宜条件下(2%乙醇和0.25%的己酸作底物,pH为4.0,30℃)酶活力可达220u/g.
短句来源
     the esterifying temperature:60~70 ℃;
     酯化温度 :60~ 70℃ ;
短句来源
     The optimum esterifying conditions were: NP 7/P 2O 5 3.2/1 (mol/mol);
     NP-7/P2O5为3.2/1(mol/mol); 酯化温度70~80℃;
短句来源
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  esterified
     Fatty acids were esterified by amide acetals at n(acid)∶n(acetal)=1∶1.1,80℃ for 2.5h,reaching yield of 80%~95%.
     以酰胺缩醛作为脂肪酸的酯化剂 ,按所选定的配料比n(酸 ) :n(缩醛 ) =1∶1.1,在 80℃反应 2 .5h ,酯化产率可达到 80 %~ 95 %。
短句来源
     Rape oil is reacted with methanol at 40-60℃ for 2h, with ethanolamine at 120℃ for 3-5h, and then esterified with maleic anhydride at 120℃ for 3h.
     菜油与甲醇在40~60℃下反应2h,再在120℃下与乙醇胺反应3~5h,然后与顺酐在120℃下酯化3h。
短句来源
     The rates of water absorption in microporous cross-linked starch and esterified microporous starch were 98.12% and 96.34% respectively, while the rates of oil absorption were 1.5 mL/g and 1.6mL/g.
     微孔交联淀粉吸水率98.12%,吸油能力为1.5mL/g,酯化微孔淀粉吸水率96.34%,吸油能力则达1.6mL/g。
短句来源
     The addition products (3′ S ) and (3′ R ) N 3′ methyloctanoyl bornane 10,2 sultam were hydrolyzed with LiOH H 2O 2,and esterified with methanol to give the target products.
     其加成产物 ( 3′S)和 ( 3′R) -N-3′-甲基辛酰基莰烷 -1 0 ,2 -磺内酰胺经 Li OH-H2 O2 水解及甲醇酯化反应即可合成目标产物 ( S)和 ( R) -3-甲基辛酸甲酯。
短句来源
     ~1H-NMR ANALYSIS OF END HYDROXYL AND DETERMINATION OF MOLECULAR WEIGHT IN PARTLY ESTERIFIED POLYETHER
     ~1H-NMR对部分酯化聚醚端羟基分析及分子量测定
短句来源
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  esterification
Rosin glycerin ester and its bromide were prepared from natural renewable rosin, glycerin and liquid bromine which were first subjected to an esterification reaction, followed by an addition reaction.
      
The catalytic activities of the solid acids were evaluated by esterification of acetic acid and butanol and the results were compared with those catalysts prepared at normal conditions.
      
Results show that PEG400 can be grafted onto the surface of the films via esterification with SMA.
      
Dimethyl 4,6-bis(bromomethyl) isophthalate was synthesized by bromomethylation, oxidation, esterification and bromination of 1,3-dimethylbenzene.
      
These substances are products of enzymatic esterification of sugars followed by their dehydration by heat treatment or long seasoning of grape wines.
      
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  esterify
It is proposed that mercaptocarboxylic acid ester free radicals can esterify PVC microradicals at carbon atoms with upaired electrons.
      
cyclopium do not esterify tertiary alcohols like many lipases.
      
Our results show that sterols can indeed be enriched in yeast by enhancing the capacity of the cells to esterify sterols.
      
These changes are more notable in the case of lecithins, varying not only with the substrate pH, but also with the length of the hydrocarbon chains of the fatty acids that esterify glycerol in the molecules of these substances.
      
The cultured skin fibroblasts had partially decreased sphingomyelinase activity and a greatly decreased ability to esterify exogenous cholesterol.
      
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  esterifying
minnesota R595 LPS on LCAT activity was evaluated from the overall esterifying activity of serum using [1,2-3H2]cholesterol-labeled substrate.
      
Immobilization of the lipase on solid supports, such as Celite 545 (physical sorption) and Eupergit C250L (covalent binding), in the presence of hexadecane-1,2-diol was found to increase the esterifying activity of the enzyme.
      
The surface properties of fumed and precipitated silicas were modified by esterifying their surface silanol groups with methanol and hexadecanol.
      
The esterifying activity is also greatly influenced by the quantity and the lipid composition of lipoprotein substrate.
      
The esterifying alcohol of the bacteriochlorophyll a from Rhodospirillum rubrum was shown to be trans-trans-geranylgeraniol.
      
更多          
  esterified
This enzyme was most efficient in removing highly esterified pectin.
      
Natural uncouplers of oxidative phosphorylation, long-chain non-esterified fatty acids, cause uncoupling in the alkalo- and halotolerant bacterium Bacillus pseudofirmus FTU.
      
Parameters of the Coordination Complexes of Esterified Polyunsaturated Fatty Acids with Silver Ions
      
In determining formic acid in an organic phase, free formic acid was esterified with benzyl alcohol in a pyridine solution while adding acetic anhydride under mild conditions.
      
The number of free and esterified carboxy groups of polygalacturonic acid was determined by conductometric titration.
      
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