二酸的

The benzene (or 80% of the butene) and the excess air in a fluidized bed or fixed-bed reactor for oxidation reaction of maleic anhydride was absorbed into the cycle of acid maleic acid.

将苯（或80%的丁烯）与过量空气在流化床或固定床反应器中进行氧化反应生成顺丁烯二酸酐，被循环的酸液吸收成顺丁烯二酸。

The conversion of eicosapentaenoicacid esters in Chlorella USTB-01 and the formation as well as extraction of EPA were investigated in this paper.

对小球藻USTB-01细胞中二十碳五烯酸酯的转化和二十碳五烯酸的生成与提取进行了研究。

In batch cultures, glucose, xylose and arabinose in cornhusk dilute acid hydrolysate after detoxification were consumed by Actinobacillus succinogenes NJ113, when the total sugar concentration was 50 g/L in medium, the final succinic acid concentration of 34.2 g/L was obtained, resulting in a succinic acid yield of 0.68 g/g and a succinic acid productivity of 0.83 g/. When the total sugar concentration was 68.2 g/L in medium, the succinic acid concentration was 42.3g/L, the yield was 0.62g/g, and productivity was 0.98 g/.

经过脱毒处理后，产琥珀酸放线杆菌 NJ113均能利用水解液中的葡萄糖、木糖、阿拉伯糖，培养基总糖浓度为50 g/L时，丁二酸分批发酵的质量收率可达0.68 g/g，浓度可达34.2 g/L，生产强度达0.83 g/，总糖浓度为68.2 g/L时，丁二酸质量收率仍可达0.62 g/g，浓度42.3 g/L，生产强度0.98 g/。

Amino-5-acety laminobenzenesulfonic acid has been synthesized from 2, 5-diaminobenzene sulfonic acid and Acid Red BG (CI Acid Red 37) has been synthesized by coupling the diazonium salt of 2-amino-5-acetylaminobenzenesulfonic acid with racid.

利用2，5-二氨基苯磺酸为原料合成2-氨基-5-乙酰氨基苯磺酸，并进一步经2-氨基-5-乙酰氨基苯磺酸重氮盐与γ酸的偶合反应合成了酸性红BG（CIAcidRed37），并对影响反应的因素进行了讨论

The worn surface was analyzed with X-ray photoelectron spectroscopy, scanning electron microscopy and electron probe microanalysis.

通过与廿二酸和硫化异丁烯的对比研究发现，在廿二酸中引入硫后，氧与硫产生了明显的协同减摩抗磨及承载作用。

In this article, different soft templates formed by sodium bis (2-ethylhexyl) sulf-osuccinate, nonyl phenol polyethyleneoxy ether (Oπ-10) and cetyltrimethyla- mmonium bromide were used to fabricate CaCO3, BaCO3 and CeO2/CuO nanoparticles with different morphology.

本文分别利用丁二酸二(2-乙基己基)酯磺酸钠、壬基-酚基-聚乙氧基醚（Op-10）和十六烷基三甲基溴化胺形成的不同软模板合成了具有不同形貌的CaCO3， BaCO3和CeO2/CuO纳米粒子。

This dissertation is mainly focused on the reactivity of methylenecyclopropanes and comprises six parts. 1 The reactions of methylenecyclopropanes with phenylsulfenyl chloride, phenylselenyl chloride and diphenyl diselenide; 2 The coupling reactions of the ring-opening products derivated from methylenecyclopropanes; 3 The palladium-catalyzed ring-enlargement of mono-aryl group substituted methylenecyclopropanes to cyclobutenes. 4 The gold-catalyzed domino ring-opening and ring-closing hydroamination of methylenecyclopropanes with sulfonamides; 5 The Lewis acid-catalyzed reactions of mono-aryl group substituted methylenecyclopropanes with diethyl ketomalonate in the presence of water; 6 The iodobenzene diacetate mediated novel 1,3-dipolar cycloaddition of methylenecyclopropanes, vinylidenecyclopropanes, and methylenecyclobutane with phthalhydrazine.

本论文主要研究了亚甲基环丙烷类化合物的一些化学反应性能，共由以下六部分组成：1、亚甲基环丙烷类化合物与苯硫氯、苯硒氯及二苯基二硒的反应；2、亚甲基环丙烷类化合物开环产物的偶联反应；3、单芳基取代的亚甲基环丙烷类化合物在钯催化剂作用下的扩环反应；4、金化合物催化磺酰胺对亚甲基环丙烷类化合物的串联开环关环氨氢化反应；5、路易斯酸催化亚甲基环丙烷类化合物与丙酮二羧酸二乙酯在有水存在下的反应；6、醋酸碘苯促进的亚甲基环丙烷类化合物、亚乙烯基环丙烷类化合物及亚甲基环丁烷类化合物与邻苯二甲酰肼的新型1，3-偶极环加成反应。

Results showed that extraction abilities depends on the hydrophobic of solutes which pK〓 values are similar, e. g. acetic, propionic, butyric and valeric acids, while pK〓 values affect dominantly the extraction abilities of acids with similar hydrophobic, e. g. formic, acetic, chloroacetic, dichloroacetic, and trichloroacetic acids. Meanwhile, diluents and TOA concentration also affect the extraction equilibria of acids through the specific basicity of TOA .

TOA对酸性差别很小的一元羧酸如乙酸、丙酸、丁酸、戊酸的萃取能力主要取决于羧酸的疏水性参数logP；TOA对疏水性参数差别较小的羧酸如甲酸、乙酸、一氯乙酸、二氯乙酸、三氯乙酸的萃取能力主要取决于羧酸的电性参数；稀释剂的种类、TOA的浓度都会影响TOA的表观碱度pH〓，并通过TOA的表观碱度影响羧酸的萃取平衡。

The results showed that in the growth period of R. glutinosa, soil ferulic acid, vanillic acid, and vanillin contents had a persistent increase, while β-hydroxybenzoic acid content increased first but decreased then. The addition of ferulic acid (8 μg·ml-1), vanillic acid (08 μg·ml-1), vanillin (12 μg·ml-1), and β-hydroxybenzoic acid (30 μg·ml-1) in water culture had stronger inhibitory effects on R. glutinosa root length, root mass, fresh plant mass, and plant height. Treating with test phenolic acids except β-hydroxybenzoic acid increased leaf chlorophyll content significantly, compared with the control. After treated with test phenolic acids, plant SOD and POD activities decreased after an initial increase, and plant malondialdehyde content increased. In the treatment of ferulic acid, root SOD and POD activities were the lowest, and roots were rotted and dead.

结果表明：阿魏酸、香草酸和香草醛含量在地黄生长期表现为持续增加，而对羟基苯甲酸含量先升高后降低；外加阿魏酸（8 μg·ml-1）、香草酸（0.8 μg·ml-1）、香草醛（1.2 μg·ml-1）和对羟基苯甲酸（3.0 μg·ml-1）对水培地黄根长、根质量、全株鲜质量和株高有较强的抑制作用；酚酸处理使地黄叶片叶绿素含量降低，除对羟基苯甲酸外差异性极显著；经过酚酸处理的地黄幼苗SOD和POD活性为先升高后下降，丙二醛含量升高，其中阿魏酸的处理使根中酶活性降至最低，根部腐烂死亡。

The synthesization technics of MPEG- MAA was studied in this paper,which is an important intermediate used for preparation of polycarboxylate superplasticizer.

本文对制备聚羧酸系减水剂的重要中间体——甲基丙烯酸聚乙二醇单甲醚酯的合成工艺进行了研究，考察了反应时间、催化剂对甲苯磺酸的用量、阻聚剂对苯二酚的用量、反应温度及甲基丙烯酸与聚乙二醇单甲醚的用量比对酯化率的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。