碳烯

The invention concerns a process for preparing heterocyclic carbenes of general formula in which R1, R2, R3 and R4 are identical or different and mean saturated or unsaturated, straight-chain, branched or cyclic, unsubstituted or substituted C1-C10 alkyl, C2-C5 alkylidene, C2-C5 alkylidine, C7-C19 aralkyl or C6-C14 alkyl groups, R3 and R4 can also stand for hydrogen or form jointly anellated, substituted or unsubstituted groups with between 3 and 7 carbon atoms and X stands for carbon or nitrogen, R3 being dropped if X is nitrogen.

本发明涉及一种制备通式Ⅰ的杂环碳烯的方法，其中在通式Ⅰ中，R1、R2、R3和R4是相同的或不同的，并且是饱和的或不饱和的，直链、支链或环状的，未取代或取代的C1－C10－烷基、C2－C5－亚烷基、C2－C5－次烷基、C7－C19－芳烷基或C6－C14－芳基基团，R3和R4可以是氢或它们一起形成具有3－7个碳原子的稠合的、取代或未取代的基团，X是碳或氮，并且当X是氮时，不存在R3。

Kinds of fatty acids were detected by method 1 and 24 fatty acids were detected by method 2. The results showed that the main components of the fatty acids in pomegranate seeds are: octadecenoic acid, octadecdienoic acid, docosanoic acid, hexadecanoic acid, octadecanoic acid, eicosenoic acid and eicosanoic acid.

方法一共检测出14种脂肪酸，主成分为油酸、亚油酸、山嵛酸、棕桐酸、硬脂酸和二十碳烯酸；方法二共检测出24种脂肪酸，主成分为棕橺酸、硬脂酸、花生酸、山嵛酸、油酸、亚油酸、二十碳烯酸等。

HMT general synthesis is aluminum chloride as a catalyst, isopropyl - toluene right with the new hexene, or 2 January 2 3 1 2 1-butene six-olefins reaction.

HMT的合成一般是以三氯化铝为催化剂，由对异丙基甲苯与新己烯、或2，3一二甲基一2一丁烯等六碳烯烃反应生成。

Based on the results of 1H-NMR, 13C-NMR, ESI-MS and UV spectra, the structures of three compounds with antitumor activity were identified as Prodigiosin、7-Hexadecenoic acid、7,10-Octadecadienoic acid, respectively; another compounds (no activity to above tumor cells)was identified as Myristic acid.

运用核磁共振（1H-NMR、13C-NMR）、质谱、紫外光谱等现代波谱技术分析，将其中3种具有抗肿瘤活性的化合物分别鉴定为灵菌红素、7-十六碳烯酸（7-Hexadecenoic acid）、7，10-十八碳二烯酸（7，10-Octadecadienoic acid）；鉴定另一种对上述肿瘤细胞无活性的化合物为肉豆蔻酸。

Results9-Octadecenoic acid,9-Hexadecenoic acid,Octadecanoic acid and so on were the chief components.

结果主要组分为9-十八碳烯酸、9-十六碳烯酸、十八烷酸等。

Results9-Octadecenoic acid,9-Hexadecenoic acid,Octadecanoic acid and so on were the chief components.

结果主要组分 9-十八碳烯酸、9-十六碳烯酸、十八烷酸等。

Comparison was synthesized from undecylenic acid and iso-propyl alcohol over HPWA-SBA-15. Comparison was made among different catalysts, and influence of composition and repeated use of the catalyst were investigated.

将该催化剂用於催化以十一碳烯与异丙醇为原料合成十一碳烯酸异丙酯，进行了不同催化剂化剂的对比实验以及催化剂组成和重复使用的考察。

GC/MS the law separates separately using the gas chromatography - mass spectrum, analyzes in the yellow croaker fish flesh to include the massive unsaturated fatty acid, confirmed the chemical composition, is mainly the vaccenic acid, the octadecenic acid and so on

利用气相色谱-质谱法分别分离，分析出黄花鱼鱼肉中含有大量的不饱和脂肪酸，确认出种化学成分，主要是十八碳二烯酸、十八碳烯酸等

The research development of the reaction of light alkenes from CO 2 hydrogenation and the supply of cheap hydrogen is discussed.

对CO_2加氢合成低碳烯烃反应进行了热力学分析，就近年来关于CO_2加氢合成低碳烯烃反应及廉价氢的供给的研究进展进行了综述。

On the other hand, steam can be used to restrain the side reaction such as hydrogen transfer reaction so as to increase the yield of light olefins by diluting the concentration of the reactant. In addition, minor steam can react with the feed hydrocarbon resulting in the decrease of coke and the formation of active hydrogen without the increase of hydrogen gas and light saturates that is not desirable.

另一方面，水蒸气不仅仅具有降低烃分压的作用，抑制了氢转移反应等副反应，对于低碳烯烃的产率有好的影响，而且在反应过程中，少量参与了反应，与烃类发生了水煤气反应，生成了活泼氢，不仅降低了焦碳的产率，并且没有提高氢气、低碳烷烃等不希望得到的产物。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新