丙二烯

Compareing with essential oil of the steam distillation method and the bensine solvent extraction method through GC-MS analysis .The result showed that:the essential oil principal constituent extracted by benzine is camphene,a-pinene,bornyl acetate, limonene, 1-methyl-4-(1-methylethyl)-1,4-cyclohexadiene, myrcene, caryophyllene, borneol.

对巴山冷杉针叶水蒸气蒸馏和石油醚萃取所得精油的GC-MS 分析对比研究结果表明：石油醚萃取精油主要成分为：莰烯，a-蒎烯，乙酸龙脑酯，柠檬烯，1-甲基-4-异丙基-1，4-环己二烯，月桂烯，石竹烯，龙脑。

This invention discloses an intermolecular charge transfer chromogen with triphenylamine group, with a formula indicated by (1), wherein: R1 is hydrogen atom or methyl group or methoxyl group, R2 is hydrogen atom or 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group.

本发明公开的含三苯胺基团的分子内电荷转移生色团，具有式1所示的结构式，其中R 1 为氢原子或甲基或甲氧基，R 2 为氢原子或2-(5，5-二甲基-3-乙烯环己烯基-2-烯亚基)丙二腈基。

Diallylethylamine was synthesized from ethylamine, allyl chloride and alkali. The structure was characterized by 1H NMR, IR and elemental analysis.

以乙胺、烯丙基氯和碱为原料合成了二烯丙基乙胺，其结构经1H NMR，FT-IR和元素分析表征。

Analysis of the treated aqueous solution was conducted with GC-MS,and the main intermediates during phenol degradation were isobutyric acid,malonic acid,benzoquinone,butenoic acid,oxalic acid,maleic acid,succinic acid,hydroquinone,catechol and resorcin.

利用GC-MS分析了苯酚降解主要中间产物为异丁酸、丙二酸、对苯醌、丁烯酸、乙二酸、顺丁烯二酸、丁二酸、邻苯二酚、对苯二酚及间苯二酚等，并据此推测了苯酚电催化氧化的可能反应途径。

Methacryloyloxydecyl-2-thiouracil-5-carboxylate was synthesized from the reaction of thiouracil with diethyl ethoxymethylene malonate and ω-hydroxy-decyl-methacrylate.

以硫脲、乙氧基次甲基丙二酸二乙酯和甲基丙烯酸ω-羟癸酯为主要原料合成了一种新的粘接性单体10-甲基丙烯酰氧癸基－2-硫脲嘧啶－5-羧酸酯。

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。

Water,caprylic/capric triglyceride,mineral oil,butylene glycol,stearic acid,acetylated lanolin,glycerin,ethylhexyl methoxycinnamate,dimethicone,polyisoprene,triethanolamine,cyclopentasiloxane,butyl methoxydibenzoylmethane,titanium dioxide,persea gratissima oil unsaponifiables,sodium DNA,borago officinalis seed oil,oenothera biennis oil,simmondsia chinensisseed oil,hydrolyzed RNA,tocopheryl acetate,urea,hydrolyzed extensin,retinyl palmitate,sodium hyaluronate,helianthus annuusseed oil,tocopherol,ascorbyl palmitate,ascorbic acid,lanolin alcohol,c12-20 acid peg-8 ester,cyclotetrasiloxane,glyceryl stearate,dimethiconol,ceteareth-20,carbomer,magnesium aluminum silicate,propylene glycol,peg-8,silica,BHT,citric acid,phenoxyethanol,methylparaben,butylparaben,ethylparaben,isobutylparaben,propylparaben,chlorhexidine digluconate

水，辛酸/癸酸三酸甘油酯，矿物油，丁二醇，硬脂酸，乙醯化羊毛脂，甘油，4-甲氧基肉桂酸-2-乙基己基酯，地美司康，聚异戊烯，三乙醇胺，环戊硅氧烷，丁基甲氧基二苯甲醯基甲烷，二氧化钛，酪梨油，DNA 钠盐，琉璃苣種子植物油，月见草油，荷荷巴籽油，水解RNA，醋酸盐维他命E，尿素，水解伸展蛋白，维他命A酯，透明质酸钠，葵花籽油，维生素E，抗坏血酸棕榈酸酯，维生素C衍生物，羊毛脂醇，C12-20 酸 PEG-8酯，环四硅氧烷，甘油硬脂酸，聚二甲基硅氧烷醇，鲸蜡硬脂醇醚-20，卡波姆，硅酸镁铝，丙二醇，聚乙二醇-8，二氧化硅，二丁基羟基甲苯，柠檬酸，苯氧乙醇，羟苯甲酯，羟苯丁酯，羟苯乙酯，羟苯甲酸异丁酯，羟苯丙酯，洗必泰葡萄糖酸盐

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

The synthesis of hyperbranched poly based upon 1,2-bis diallyl (methyl silyl ethane (B4) as a core molecule and diallyl silane (AB2) monomer via hydrosilylation addition have been investigated: And the hyperbranched poly were prepared using onestep without core, one-step with core and pseudo-one-step methods.

以四烯丙基硅烷(B4)为核、甲基氢二烯丙基硅烷(AB2)为单体，通过硅氢加成反应，采用无核一步法、核一步法、核多步法合成了超支化聚有机硅破烷。

Malonyloxyborohydride,a hydroboration reagent,is prepared by reaction of malonic acid and sodium borohydride,and is used to react with dihydromyrcene in THF.

用一种硼氢化试剂———丙二酸与硼氢化钠反应生成的丙二酰氧基硼氢化钠在THF中与二氢月桂烯反应制备香茅醇。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。