戊烯

Total volatile components, acetone, cyclohexadiene, cyclopentyl ethyne, acetic acid and hexanal contents show more significant correlation with storage time, physiological biochemical indexes respectively, and it can be used as an assessment index for the storage quality of stored maize.

总挥发性物含量、丙酮、对环己二烯、环戊乙炔、乙酸、己醛的含量与储藏时间、生理生化指标呈较高相关性，可作为玉米储存品质变化的评判指标。

It has yearly produces 60,000 tons monoammonium phosphates, 18,000 ton chlorinated paraffin wax, 6000 tons nitrocottons, 5000 tons glutaric dialdehydes, 4000 ton acrolein productivities.

具备年产6万吨磷酸一铵、1.8万吨氯化石蜡、6000吨硝化棉、5000吨戊二醛、4000吨丙烯醛生产能力。

Since many phenylvinyl ketone derivatives showed a certain anti- inflammatory activity, the indolyl group is introduced to this skeleton, and thus a series of 1, 4-penten-3-one derivatives characteristic of the structures of both phenylvinyl ketone and indole have been synthesized and characterized by elemental analyses, MS, UV-vis, and 〓 NMR as well. All these compounds are found to be trans-isomers.

考虑到苯乙烯酮类化合物的抗炎活性，本文将吲哚基团引入到该类化合物上，设计合成了一系列新的兼具苯乙烯酮和吲哚二者结构特征的1，4-戊二烯-3-酮衍生物Al-A24，并对其进行了表征，发现所有这些化合物均为反式构型。

Several routes for synthesizing methyl isopropyl ketone were introduced, including the main methods based on isobutyl aldehyde-acetic acid, isobutyric acid -acetic acid, methyl ethyl ketone-formaldehyde and isoprene.

介绍了甲基异丙酮的多种合成路线，主要有异丁醛-乙酸法、异丁酸-乙酸法、甲基乙基酮-甲醛法和异戊二烯法。

It was found that more branch-2 olefin and C5~C6 isoparaffin molecules existed in MIP naphtha. The cause of MIP naphtha having higher octane number and less octane loss during hydrotreating could be explained by the octane model of C6 hydrocarbons quantitatively.

通过对MIP和FCC汽油组成分析，发现MIP汽油组成含有较多的多支链烯烃、异戊烷和异己烷，基于碳六烃的辛烷值模型，可以定量地解释MIP汽油辛烷值高和加氢MIP汽油辛烷值损失低的原因。

The ozonolysis of isoprene has a significant contribution to atmospheric carbonyls, especially to formaldehyde and methylglyoxal.

异戊二烯臭氧氧化反应对大气羰基化合物特别是甲醛和丙酮醛具有重要贡献。

The polymer also had better moisture resistance because of the hydrophobic nature of DCPD and naphthyl groups.

由于憎水性的萘环结构和环戊二烯环的引入，固化产物也表现出良好的耐水性。

All dates were analyzed by the principal component analysis through using the SIMCA-P 10.0 software. Result: The PCA demonstrated that the metabolome between treated group and control group had difference in rat urine sample after of 22 days administrated, for treated group 169 kinds of biomarkers were found including oxalacetic acid, malic acid, 2-ketoglutaric acid, NE, arachidonic acid, 5-HIAA and other compounds, the result was consistent with pharmacological effects of R.coptidis , such as antiinflammatory, inhibiting biosynthesis of CA biosynthesis, anti-central nerve and energy metabolism inhibition.

结果：给药22 d，黄连组与对照组大鼠尿样代谢组有较大差异，发现了169个生物标记物，其中可能的化合物为草酰乙酸、苹果酸、2-酮戊二酸、去甲肾上腺素、花生四烯酸、5-羟吲哚乙酸等物质，这与黄连抗炎、阻止儿茶酚胺的生物合成、抑制中枢神经、降低能量代谢的药理作用相一致。

The structure of the compound 〓(1) consists of a pentanuclear molecule which is center-symmetric. One W atom is coordinated by four S atoms and two Cu atom. As expected, the Fe atoms are sandwiched between two staggered pentadiene rings. The most interesting aspect of the structure is that Fe-C-P-Cu-P-Cconstitutes a distorted hexagon and Fe-Cu-W-Cu-Fe is nearly in a line.

结构是以W原子为对称中心含有五个金属原子的线型结构，W原子与四个μ〓-S和两个Cu原子配位；Fe原子在两个戊二烯环中间形成一个三明治夹心结构；Fe〓-C〓-P〓-Cu〓-P〓-C〓-构成扭曲的六边形，由于两边1，1'-双二茂铁配体的作用导致Cu-S键的拉长。

Ethyl alcohol, 3-methyl-4-oxo- pentanoic acid, acetic acid butyl ester, 2-methyl-butanoic acid ethyl ester, diethyl phthalate,-2,4-Decadienal were the same volatiles d from the 10 cultivars.

其中共有组6种，为乙醇、3-甲基-4-羰基戊酸、乙酸丁酯、2-甲基丁酸乙酯、邻苯二甲酸二乙酯、-2，4-癸二烯醛。

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。