您要查找的是不是：
- Tri n butyl citricate(TBC)was synthesized with zeolite supported ZrO 2 Dy 2O 3/SO 4 2 solid super acids(ZDSH) as catalysts. 用固体超强酸催化剂（ZrO2?Dy2O3/SO42 －?沸石分子筛） 催化合成柠檬酸三丁酯（TBC） 。
- R E F 0 X D 4 N ?L Y .?D H .E U .A D N .L T .N O L W .E H .Y N .Y K E . 本站免费电影;提供最新的免费电影在线观看;所有免费电影地址收集于网络;仅做宽带测试.;相关版权归原著作权人所有
- In the presence of aminosulfonic acid catalyst,lactic acid reacted with n butyl alcohol to form n butyl lactate. 以氨基磺酸为催化剂，实现了乳酸与正丁醇反应合成乳酸正丁酯。
- In this paper, the research progress on the exposure,metabolism,toxicity and endocrine disruptingeffects of di n butyl phthalate were reviewed. 邻苯甲二酸二丁酯;;内分泌系统;;成形剂;;毒性作用;;塑料;;职业;;环境;;
- Three plasticizers were used: namely dioctyl phthalate (DOP), di n butyl phthalate (DBP) and di(-2-ethyl-hexyl)sebacate(DOS). 研究中采用的增塑剂为邻苯二甲酸二辛酯 (DOP)、邻苯二甲酸二正丁酯 (DBP)和癸二酸二辛酯 (DOS)。
- The influence facts upon adhesive strength,such as hardening agent content, n butyl acrylate content,synthesis condition were discussed. 考察了固化剂含量、预固化及预聚合时间、丙烯酸丁酯含量以及引发剂含量对胶粘剂力学强度的影响。
- N butyl 2 ethoxy thioacridone was prepared from o chloro benzoic acid and p phenetidine by means of Ullman reaction,cyclization,N alkylation and sulfurization. 以邻氯苯甲酸和对乙氧基苯胺为原料,经过胺的苯基化、二芳胺的环化、N-烷基化、硫代化反应合成了N-丁基-2-乙氧基硫代吖啶酮。
- The effects of the amount of sodium bisulfate monohydrate,the amount of n butyl alcohol and reaction time on the yield of n butyl gallate have been investigated. 以没食子酸和正丁醇为原料,采用一水合硫酸氢钠作催化剂合成没食子酸正丁酯。
- The detection included COD, NH + 4 N, NO 3 N, NO 2 N, DO, P, pH and heavy metals such as Pb, Cr, Cd, Mn, Zn, Cu, Fe, Al and so on. 监测内容包括 :化学需氧量 (COD)、氨氮 (NH+ 4 N)、硝酸盐 (NO 3 N)、亚硝酸盐 (NO 2 N )、溶解氧 (DO)、磷 (P)、酸度和重金属 (Pb、Cr、Cd、Zn、Mn、Cu、Fe、Al)。
- The n butyl gallate was synthesized by esterification of butyl alcohol and gallic acid in catalysis of p methyl toluenesulfonic acid (PTSA) induced by microwaves. 采用微波辐射技术，以对甲苯磺酸（PTSA）作催化剂，没食子酸和正丁醇直接酯化合成没食子酸正丁酯。
- The NH 4 N in DCD treatment maintained high level, which illustrated that DCD had strong inhibiting effect on nitrification. DCD处理的NH4 N一直保持较高水平 ,说明DCD对土壤硝化过程有强烈的抑制作用。
- A study was made on the synthesis of n butyl acetate and isobutyl acetate with aminosulfonic acid as the catalyst.The optimum conditions were chosen by the experiments. 研究了以氨基磺酸为催化剂，催化合成乙酸正丁酯和乙酸异丁酯的工艺过程，实验确定了其优惠反应条件。
- Possibly, it is important factors that seawater temperature and NH + 4 N effects the distribution of cyanobacteria in the Bering Sea. 海水温度和NH+ 4 - N可能是影响蓝细菌数量分布的重要因素
- Therefore,the removal of COD ,NH + 4 N and TN from SCAS is improved in comparison with that from the conventional activated sludge process. 添加浮动填料可简易地改造现有的活性污泥法处理系统，以适应更严格的排放标准。
- The adsorption process of n butyl acetate in a packed bed of activated carbon fiber is studied. The adsorption rate equation and the adsorption order and adsorption balance constant of Freundlich adsorption isotherm equation are obtained. 研究了醋酸丁酯在活性炭纤维床层中的吸附过程 ,获得吸附速率方程和 Freundlich吸附等温方程的吸附级数、吸附平衡常数。
- Ethyl acetate,n butyl acetate,n amyl acetate,n heptyl acetate,benzyl acetate,ethyl hexanoate,isopropyl chloroacetate and 2 ethylhexyl acrylate were synthesized using modified gnarl catalyst. 以改性片麻岩为催化剂合成了醋酸乙酯、醋酸丁酯、醋酸戊酯、醋酸庚酯、醋酸苄醇酯、己酸乙酯、氯乙酸异丙酯和丙烯酸2乙基己醇酯,其收率都在90%25以上。
- The consistence of 0 5%, 0 3%, 0 3% is optimal respectively when the DCD is added in order to both hold up the loss and accelerate the transformation of NH 4 N in Purple, Yellow Soil and Aquent. 在紫色土、潮土和黄壤上添加DCD抑制NH4?N 损失和转化的效果分别以0－5 %25 、0－3 %25 、0－3 %25 浓度为最佳。
- The content of total N,NH + 4 N and NO - 3 N varied widely with different organs because of the effects of soil water,nutrient content, atmospheric temperature,vegetable feature and selective absorption to nitrogen,etc. 受土壤水分、养分、气温和植物本身特点及其对N素选择吸收作用等多种因素影响 ,小叶樟、毛果苔草和漂筏苔草 3种植物不同器官中‘三氮’含量变化较大 ,NO-3 N比NH+4 N含量稳定且NH+4 N/NO-3 N >1;
- The esters of 4 n alkylcyclohexyl benzoic acid have higher clearing point than other nematic liquid crystal, it is a good display material for automobile and showed to have great promise. 正烷基环己基苯甲酸酯比其它向列型液晶有更高清亮点,是一种优越的车用显示材料,前景广阔。
- Keywords n butyl gallate;microwave;esterification;PTSA; 没食子酸正丁酯;微波;酯化;PTSA;
