二酸

Polyurethane emulsion petroleum emulsion breaking agents are prepared from tolyl diisocyanate,α,α-dimethylolpropionic acid and polypropylene glycol or glycerine ...

聚氨酯乳液石油破乳剂是由α，α-双羟甲基丙酸、甲苯二异氰酸酯分别与聚丙二醇、单甘酯、聚氧乙烯聚氧丙烯聚合物通过加成反应制得的。

Unicolor during the period of florescence with the random block design of three factors. The results showed that the accumulation of MDA decreased. The content of soluble sugar, CAT activity and free proline increased with the increasing of potassium fertilizer application within 0 to 150 kg/hm^2. Potassium fertilizer application was more than 150 kg/hm^2, the result was opposite.

结果表明，施钾量在0~150 kg/hm^2范围内，随着钾肥施入量的增加，丙二醛含量降低，可溶性糖含量、过氧化氢酶活性和脯氨酸含量增加，但施钾量超过150 kg/hm^2时，丙二醛含量略有上升，可溶性糖含量、过氧化氢酶活性和脯氨酸含量有所下降。

The excess of ethyl orthosilicate should render the chain terminal unreactive toward the crosslinking...

降解是由于水在二月桂酸二丁基锡酯或它的水解产物月桂酸催化下使聚二甲基硅氧烷主链的Si—O—Si键水解所引起的。

For the saturated aromatic aldehydes with malononitrile and barbituric acidit, the reaction was found to proceed very efficiently at room temperature giving excellent yields under ultrasonic irradiation, while for α,β-unsaturated aldehydes as well as p-phthalaldehyde with malononitrile and barbituric acid the reaction also proceeded smoothly at room temperature with good yields.

在超声波辐射下，不仅饱和芳香醛与丙二腈、巴比妥酸的一锅反应在室温下能高收率地进行，而对于α，β-不饱和醛以及二元醛与丙二腈、巴比妥酸的一锅反应也能在室温下顺利进行，获得较高的收率。

The experimental results show that using the feed technique of "starved state" can raise the conversion ratio of monomers, shorten the reactive time and get polymers with much more even distribution of molecular weight; the technique of adding azobisisobutyronitrile as an initiator first and then benzoperoxide as another initiator at later Stage of experiment can get higher initiating efficiency than using one initiator only.

结果表明：采用&饥饿态&聚合工艺可提高单体转化率，缩短反应时间，且所得到聚合物相对分子质量分布均匀；选用偶氮二异丁腈和过氧化笨甲酰两种引发剂进行复配，比选用单一引发剂的引发效果好；选用酯酸丁酯、正丁醇和丙二醇甲醚丙酸酯作混合溶剂，当配比为2：1：1时聚合体系稳定，聚合物的固体质量分数可达70%，且粘度适中。

Meanwhile, the standard experiment on addition of small molecular organic arsenics revealed that the small molecular organic arsenics such as cacodylic acid, disodium methylarsonate were detected to be inorganic arsenic by the two detection methods with high recovery efficiency.

同时，试验中用小分子有机砷进行加标试验，结果表明：二甲基胂酸、甲基胂酸二钠等小分子有机砷对两种测定方法的影响很大，会把小分子有机砷作为无机砷检测出来，且检出回收率很高。

Gemini surfactant, sodium oleoylamidodiphenyl ether disulfonate was synthesized from p-nitrodiphenylether,oleoyl choride and chlorosulphonic acid through nitro-group reduction,acylation and sulphonation.

以对硝基二苯醚、油酸酰氯、氯磺酸为主要原料，通过硝基还原反应、胺基酰化反应、磺化反应，合成了双子表面活性剂油酸酰胺基二苯醚双磺酸钠；并用IR，1HNMR，MS对产品及中间体结构进行了表征。

Grafting of crotonic acid, undecylenic acid, oleic acid, and acrylic acid onto ABS was initiated by benzoyl peroxide in 1, 2-dichloroethane solution.

以过氧化二苯甲酰为引发剂，在1，2-二氯乙烷溶液中进行反式丁烯酸、10-十一烯酸、油酸、丙烯酸接枝ABS树脂。

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

Experimental study on enhanced deaquation process for extra-heavy crude oil using dehydrant ;2. DMF refining by molecular sieve as dehydrant ;3. Hybrid catalysts composed of JC207 methanol synthesized catalyst and dehydrant (HZSM-5 zeolite or γ-Al2O3) were prepared for the synthesis of dimethyl ether.

采用甲醇合成催化剂JC207和固体酸脱水剂(HZSM-5分子筛或γ-Al2O3)混合制得合成二甲醚双功能催化剂，并在固定床反应装置中进行了活性评价，考察了固体酸脱水剂的酸性对一步法合成二甲醚的影响。

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。