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Besides, it makes discussions on the factors that affect the deacetylate degree of chitosan, and obtains the optimal technical conditions as follows: the density of sodium hydroxide 35%, the reaction temperature 90℃, the reaction time 3 h, and the transfer catalyst dosage 5%.

讨论了影响壳聚糖脱乙酰度的因素,确定了最佳工艺条件,氢氧化钠质量分数为35%;反应温度90℃;反应时间3h;相转移催化剂质量分数为5%。

The effects of catalyst, deaquation reagent, reaction time and the ratio of raw materials on the reaction were examined.

考察了催化剂、带水剂、反应时间、物料比等因素对反应的影响。

High reaction performance and decoking ability were obtained in gas-phase oxidative cracking of decalin , as compared with its pyrolysis reaction.

十氢萘气相氧化裂解与传统的热裂解工艺相比,O2的存在降低了十氢萘 GOC反应的活化能,使反应在较低温度下具有高的反应性能;O2同时起到消除积炭的作用,提高体系的抗积炭能力。

The silver nanoparticles modified by oleic acid were successfully synthesized by the replacement reaction of silver nitrate with metal sodium in decalin, and the reaction was achieved via ultrasonic irradiation.

在有机介质十氢化萘中,以金属钠、硝酸银和油酸钠为起始原料,通过超声辐射使金属钠和硝酸银发生置换反应,成功制备了油酸表面修饰的Ag纳米微粒。

Solvent effect on the Diels-Alder reaction was analyzed with four different kinds of solvents: benzyl alcohol, cyclohexanone, toluent and decalin. The results show that the rate of the Diels-Alder reaction increased in more polar solvents and stereoselectivity of TCPD decreased.

在模拟计算基础之上,选择苯甲醇、环己酮、甲苯及十氢萘四种溶剂进行Diels-Alder反应的溶剂效应研究,考察温度、压力变化对反应速度、产物立体选择性的影响。

After this research work, we know that: HMCM-22 is a better catalyst of selecting naphthalene alkylation; Surface modification of zeolite Y is effective, but the effect of zeolite 3 is not evident and surface modification doesn"t suits mordenite; Surface modification doesn"t affect the frameworks and inner environments of zeolites, but only reduces diameter of orifice and overlays surface acidities; t-butanol is not suitable for alkylating agent of the reaction using modified zeolites as catalyst; Solvents with smaller molecular size are advantageous for naphthalene alkylation reaction using modified zeolites as catalyst, such as cyclohexane is better than decalin.

通过本论文的研究,我们知道:HMCM-22是萘择形烷基化反应较好的沸石之一;Y沸石的外表面改性效果较好,β沸石则效果不明显,而丝光沸石则不适于外表面改性;外表面改性不改变沸石的骨架结构和孔道内部环境,仅减小孔口直径和覆盖外表面酸性位;叔丁醇不适于作外表面改性沸石催化的反应的烷基化试剂,其反应活性很低,且选择性无明显提升;分子较小的溶剂更适于外表面改性沸石催化的反应,环己烷就明显好于十氢萘。

Limestone does technology of to decoke of law flue gas partly is a kind " work / wet / dry " technology of half dry to decoke, have at the same time wet the advantage with dry method to decoke, namely the reaction process inside desulphurization tower is wet condition, and reaction by-product is dry state.

石灰石半干法烟气脱硫技术是一种&干/湿/干&的半干脱硫技术,同时具有湿法和干法脱硫的优点,即脱硫塔内的反应过程是湿态的,而反应副产物是干态的。

The thermodynamics quantities were calculated based on the first relaxation process. The results indicated that active enthalpy△H and active entropy △S all decreased with the increase of decrystallization extent. And, it was concluded that the relaxation process of untreated wood is for endothermic reaction and that of treated wood for exothermic reaction.

并通过计算获得了第一个松弛过程的各个热力学量,活化焓△H和活化熵△S都随着非晶化处理程度的增加而减小,未处理木材的松弛过程为吸热反应,而处理木材的松弛过程为放热反应。

There is dehydrogenization reaction during the combustion process leading to sample expansion, which is harmful to the reaction between W and C and unfavorable to the synthesis of uniphase C.

燃烧产物由两种粉末组成:粒径2-4μm,棱角较明显的粗粒度粉末和粒径≤1μm的细粒度粉末;随体系中W含量减少和预热温度的提高,产物粗粒度粉末增加,细粒度粉末减少。

The types include:spontaneous emulsion and electrifying demulsion; 2Spontaneous oscillatory reaction of triglyceriedes hydrolysis in the emulsion and electrifying esterification;(3Substitution of salt bridge with surfactant solution to form new type electric chemical oscillator and then electrolyze to converse reaction.

这些类型包括:(1)自发乳化,通电破乳;(2)乳液中自发产生的甘油三酯水解振荡反应及通电逆向酯化反应;(3)用表面活性剂有机溶液代替盐桥,形成新型的电化学振荡,通电逆向电解。

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推荐网络例句

What are your goals and strategies for growth?

你的成长目标和策略是什么?

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3:1 你要写信给撒狄教会的使者,说,那有神的七灵和七星的,说,我知道你的行为,按名你是活的,其实是死的。

"It is a testament to making sure unemployment compensation is available, making sure we are looking out for people who have lost their jobs," she said.

"这是个实证,证明我们必须确保人们都可以得到失业补偿,确保那些失去工作的人们得到照顾。"