甲基丙醛

Methacrylic acid-acraldehyde/ montmorillonite nanocomposites were prepared using Na+- montmorillonite via in-situ polymerization of methacrylic acid and acraldehyde in aqueous medium.

采用水溶性聚合单体甲基丙烯酸和丙烯醛在钠基蒙脱土层间直接原位插层聚合制备水溶性MAA-AL/MMT纳米复合材料，通过XRD和TEM对纳米复合材料的结构进行表征，采用TGA、DSC研究了纳米复合材料的热性能，同时考察了甲基丙烯酸与丙烯醛配比及体系pH值对纳米复合材料结构及应用性能的影响。

Is a high-tech private enterprise, located in Laohekou City, Hubei Province, the main products are: 3,4 - dichloro-nitrobenzene; 3,4 - dichloroaniline; 2,4 - dimethyl-nitramine p; 2,4 - dimethylaniline; 2,6 - dimethyl-nitrobenzene; 2,6 - dimethylaniline; 3,5 - dimethyl-nitrobenzene; 3,5 - dimethyl Aniline; acrolein; Glutaraldehyde and other fine chemical products.

老河口联谊化工有限公司为一家高科技民营企业，位于湖北省老河口市，主要产品有：3，4-二氯硝基苯；3，4-二氯苯胺；2，4-二甲基硝基苯；2，4-二甲基苯胺；2，6-二甲基硝基苯；2，6-二甲基苯胺；3，5-二甲基硝基苯；3，5-二甲基苯胺；丙烯醛；戊二醛等精细化工产品。

The common chemical constituents were juniper camphor,1,3,3-trimethylcyclohex-1-ene-4-carboxaldehyde,borneol,α-curcumene,α-bisabolol,cis-caryophyllene,benzyl benzoate,methyl β,β-dimethylbenzenepropanoic acid ester,2,4-decadienal and heneicosane in the essential oil of the five cultivars' Hangjuhua.Among them,juniper camphor is most which were composed of 11.96%,10.51%,10.95%,13.28% and 10.77% of the total essential oil,and methyl β,β-dimethylbenzenepropanoic acid ester is second,which were composed of 1.51%,1.86%,2.52%,4.89% and 2.51% of the total essential oil,respectively.

5种栽培类型杭菊花挥发油中共有成分为1，3，3-三甲基环己-1-烯-4-甲醛、冰片、α-姜黄烯、α-甜没药萜醇、顺式石竹烯、桧脑、安息香酸苄酯、β，β-二甲基苯丙酸甲酯、2，4-癸二烯醛和二十一烷；其中桧脑含量最高，分别占挥发油总量的11.96%，10.51%，10.95%，13.28%和10.77%，为5种栽培类型杭菊花挥发油中最具特征的成分；其次是β，β-二甲基苯丙酸甲酯，分别占挥发油总量的1.51%，1.86%，2.52%，4.89%和2.51%。

This invention applies mild condition uses substituent group triphenylamine aldehyde or triphenylamine dialdehyde as raw material to react by heating with 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group to produce the intermolecular charge transfer chromogen with high decomposition temperature, non-coplanar structure, and triphenylamine group.

本发明采用温和的手段，将取代基三苯胺单醛或取代基三苯胺双醛为原料与2-(3，5，5-三甲基环己烯-2-烯亚基)丙二腈共热生成具有高的热分解温度、非共平面空间结构的含三苯胺基团的分子内电荷转移生色团。

The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.

产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17)；同时，将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛，异戊醛和环己醛)的不对称烯丙基化反应，并与广泛应用的Roush配体(22)和Brown配体(27)相比较，发现其立体选择性优于Roush配体，并接近Brown配体，但明显具有可回收利用的优势。

Water,butylene glycol,glycerin,glyceryl polymethacrylate,triethanolamine,carbomer,ppg-26-bueth-26,chondrus crispus,peg-40 hydrogenated castor oil,phenoxyethanol,imidazolidinyl urea,propylene glycol,benzophenone-4,retinyl palmitate,citrus aurantiudulcisoil,phospholipids,methylparaben,tocopheryl acetate,c12-23 alkyl lactate,disodium EDTA,centella asiatica extract,iris germanica root extract,pentadecalactone,aloe barbadensis leaf juice,mimosa tenuiflora bark extract,sodium hyaluronate,menthol,biosaccharide gum-1,citrus aurantium amara oil,propylparaben,methylchloroisothiazolinone,sodium benzoate,potassium sorbate,citric acid,calcium sorbate,methylisothiazolinone,butylparaben,ethylparaben,yellow 5(CI 19140),limonene,linalool

水，丁二醇，甘油，甘油聚甲基丙烯酸酯，三乙醇胺，卡波姆，PPG-26-丁醇聚醚-26，鹿角菜胶，PEG-40 氢化蓖麻油，苯氧乙醇，尿素醛，丙二醇，二苯酮-4，维他命A酯，甜橙油，磷脂质，羟苯甲酯，醋酸盐维他命E，C12-13 烷醇乳酸酯，乙二胺四乙基二钠，雷公根萃取，鸢尾花根萃取，环十五内酯，吉拉索芦荟叶汁，含羞草萃取，透明质酸钠，薄荷脑，多醣物质，苦橙油，羟苯丙酯，甲基氯异塞唑晽酮，苯甲酸钠，山梨酸钾，柠檬酸，山梨酸钙，甲基异噻唑啉酮，羟苯丁酯，羟苯乙酯，柠檬黄，柠檬精油，沈香醇水：几乎所有护肤品成分第一位都是水。丁二醇：保湿剂及溶剂，质地温和

The results of in situ DRIFTS on propylene oxidation show that the allyl species originated from α-H abstraction of propylene were located at the wavenumbers of 1454 cm~(-1) and 1427 cm~(-1). The rate-determining step is the abstraction of an α-H abstraction from a lattice oxygen linked to a bismuth ion to form a π-allyl intermediate coordinated to a molybdenum ion. The metal-oxo group then attacks the allyl intermediate forming a σ-bonded oxygen-allyl species, which is in a rapid equilibrium with the π- bonded species. The σ-bonded species then transforms to acrolein by further abstraction of α-H. Such species as formate, carboxylate, carbonate transform to deep oxidation products. The acetone was derived from propylene by an enolic species at lower temperatures.

丙烯氧化反应体系的原位漫反射红外光谱研究结果表明，由丙烯脱氢生成的烯丙基中间物种吸收峰在1454cm~(-1)和1427cm~(-1)处；基于此提出了较完整的丙烯氧化反应网络：丙烯选择氧化生成丙烯醛主要经历丙烯脱除甲基上的一个H，生成烯丙基物种，该物种嵌氧生成σ-O络合物，脱氢得到丙烯醛前驱体，脱附生成丙烯醛；完全氧化产物是由催化剂表面上生成甲酸盐、羧酸盐、碳酸盐等形式的中间物种转化而成；较低反应温度下丙烯氧化生成丙酮，通过烯醇式中间物种氧化生成丙酮前驱体得到。

A series of 3 - aryl - 3 -( 5,5 - dimethyl - 3 - hydroxy - 2 - cyclohexene - 1 - one - 2 - yl) propanoic ester s were synthesized by reaction between aromatic aldehydes ,5,5- dimethyl -1,3-cyclohexanedione and isopropylidene malonate catalyzed by KF - Al2O3 in alcohols.

在KF-Al_2O_3催化下，将芳香醛3，5-二甲基-1，3-环己二酮及丙二酸亚异丙酯在醇中反应，一锅式合成了一系列的3-芳基-3-(5，5-二甲基-3-羟基-2-环己烯-1-酮-2-基)丙酸酯。

Water, C12-20 acid PEG-8 ester, hydrogenated polysobutene, petrolatum, dicaprylyl maleate, hydrogenated vegetable oil, propylene glycol, acetylated lancolin, glycoprrotiens,panax ginseng root extract,equisetum arvense extract, carbomer, butyrospermum parkill fruit, potassium cetyl phosphate, triethanolamine, hypericum perforatum extract, malva sylvestris extract, methylparaben, glycerin, urea, saccharide hydrolysate, magnesium aspartate, glycine, alanine, creatine, propylparaben, ethlparaben, imidazolidinyl urea, polyperfluoromethylisopropyl ether, fragrance

水，C12-20 酸 PEG-8酯，氢化聚异丁烯，凡士林，马来酸二辛酯，氢化植物油，丙二醇，乙醯化羊毛脂，糖蛋白，人参根萃取，问荆萃取，卡波姆，乳木果，鲸蜡醇磷酸酯钾，三乙醇胺，金丝桃萃取，锦葵萃取，羟苯甲酯，甘油，尿素，水解糖，天门冬酸镁，甘氨酸，丙氨酸，肌酸，羟苯丙酯，羟苯乙酯，尿素醛，聚全氟甲基异丙基醚，香料

This paper mainly studies the synthesis of 2-Isopropyl-5-Methyl-2-Hexenal from the optimum reaction conditions of from self aldol condensation of Isovaleraldehy,with NaOH solution as the catalyst of the condensation.

本文以NaOH水溶液为催化剂，探讨了异戊醛Aldol缩合制备可可醛(2异丙基5甲基2己烯醛)的最佳反应条件：反应温度50℃、反应时间9h、催化剂NaOH水溶液的浓度2mol.L1、OH-/异戊醛为1/1，主产物可可醛的产率为92.2%。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。