烯酮

Because the olefinic hydroxyl groups are linked with olefinic carbon, so it can ionize H〓 ion and present the properties of weak acid, and so the olefinic hydroxyl groups change into the structure of alcoholate in the presence of alkali , but the structure of alcoholate may change into the structure of olefine alcohol again, after the Na〓 ions is removed, or when the pH value of its solution turn into pH. Because the structure of the olefine alcohol is not stable and is easy to isomerizate to become the structure of olefine ketone, so there appear the ca. 1730cm〓 C=O absorption peak in the IR spectra of the products.

明确指出了在C〓、C〓富勒醇中存在烯碳羟基与叔碳羟基等二类羟基，烯碳羟基由于与一个共轭体系相连，从而其羟基可以离解而呈现出弱酸的性质，因而在碱性条件下易形成烯醇钠盐的结构，当除去钠离子后或在酸性溶液中，烯醇钠盐结构转变为烯醇结构，但由于烯醇结构不如烯酮结构稳定，从而形成烯醇结构后，烯醇结构异构化为烯酮结构，因此在其产物的IR谱图上出现1730cm〓附近的C=0吸收信号。

We have had the extensive studies on theα-acetyl-α-carbamoyl ketene--acetals and its further applications, for example, their adols condensations with aldehydes giveα-alkenoyl-α-carbamoyl ketene--acetals which can be utilized as the 1,5-bielectronic five-carbon components to react with various binucleophlilic species in a [5+1] annulation.

我们小组在以前的工作中对α-乙酰基-α-胺甲酰基二硫缩烯酮在合成中的应用进行了深入的研究，如与醛缩合生成α-烯酰基-α-胺甲酰基二硫缩烯酮，将其作为1，5-双亲电五碳合成子的[5+1]成环策略等。

The results showed that the first canonical correlation coefficient between aldehydes, ketones, esters and the total quantity of each kind of ingredient and smoking quality achieved 5 % or 1 % remarkable level. And their correlation depended mainly in the correlation between phenylacetaldehyde, furfural, megastigmatrienone-1, megastigmatrienone-3, geranylacetone,β-damascenone, keto-isophorone, dihydroactinidiolide and smoking quality.

结果表明：醛类成分、酮类成分、酯类成分与香气质、香气量的第一典型相关系数达到5%或1%显著水平，各类成分总量与香气质、香气量的第一典型相关系数达到1%极显著水平，其相关关系主要表现在苯乙醛、糠醛、巨豆三烯酮1、巨豆三烯酮3、香叶基丙酮、β-大马酮、氧化异佛尔酮、二氢猕猴桃内酯等成分与香气质、香气量的相关上。

It mainly empoison feed and cropper, such as wheat oat corn and so forth. It can arouse uterine portliness, metrohypertrophia, non-oestrus and abortion of female livestock, female symptom of boar.

玉米赤霉烯酮可引起雌性畜禽的阴道上皮角质化、子宫肥大、流产、假发情或不发情等类雌激素综合症，雄性动物接触玉米赤霉烯酮后出现"雌性化"症状，此外，玉米赤霉烯酮还具有免疫毒性和潜在的致癌性，对动物和人类健康的威胁十分巨大。

So, by the Diels-Alder reaction of tetraphenylcyclopentadienone, acenaphthenecyclone and benzophenanthrenecyclone with the vinyl groups in C gum, three kinds of polymethylvinylsilicone oil with condensed aromatics are synthesized respectively: polymethylvinylsilicone oil with tetraphenylphenyl groups (called C_1 gum for short), polymethylvinylsilicone oil with acenaphthenyl groups (C_2 gum) and polymethylvinylsilicone oil with benzophenanthrene groups (C3 gum).

根据此原则，利用四苯基环戊二烯酮、苊式环戊二烯酮和菲式环戊二烯酮与C胶上的乙烯基进行Diels—Alder反应，分别合成了三种含稠环基团的乙烯基硅油：四苯基苯基乙烯基硅油(C_1胶)，苊式多苯基苯基乙烯基硅油(C_2胶)和菲式多苯基苯基乙烯基硅油(C_3胶)，并根据~1HNMR谱图上不同氢原子的积分面积计算了三种胶中稠环基团和乙烯基的含量。

It mainly empoison feed and cropper, such as wheat oat corn and so forth. It can arouse uterine portliness, metrohypertrophia, non-oestrus and abortion of female livestock, female symptom of boar.

玉米赤霉烯酮可引起雌性畜禽的阴道上皮角质化、子宫肥大、流产、假发情或不发情等类雌激素综合症，雄性动物接触玉米赤霉烯酮后出现&雌性化&症状，此外，玉米赤霉烯酮还具有免疫毒性和潜在的致癌性，对动物和人类健康的威胁十分巨大。

16 And 19 components are identified from three specimens,which accounted for 99.63%, 99.70% and 99.28% of volatile fraction, respectively. The major components are pulegone and menthone, which accounted for 89.02%, 83.51%and 87.11%(Horm rural Buerjin county of Xinjiang). Others are isomenthone, piperitenone,isopulegone and limonene et al.Key words Ziziphora clinopodioides Lam. essential oil gas chromatography-mass spectrometry

从3个样本中分别鉴定出10种、16种和19种挥发油成分，占各自挥发油总量的99.62%、99.71%和99.28%。3个采集地的芳香新塔花的主要成分相同，均为长叶薄荷酮和薄荷酮，两者总量分别达到了89.02%、83.51%和87.11%（新疆布尔津县禾木乡样品），其他主要成分为异薄荷酮、胡椒烯酮、异长叶薄荷酮、柠檬烯等。

Synthesis of organic sulfuric compounds in aqueous media is carried out by: using thio-olefin compounds with carbonyl compounds, acetal/keltone, hydrazone, oxime, osazone and enamine to synthesize mercaptal/keltone compounds in aqueous media; using thio-olefin compounds with alpha-hydroxyaldehyde/keltone or alpha-halogenated aldehyde/keltone to synthesize thia-olefin derivatives in a queous media; using thio-olefin compounds with alpha, beta-unsaturated hydroxy compounds, C-C treble bond, C-N treble bond, C-C double bond, N-N double bond, C-N double bond, C-S double bond, epoxy and its derivatives, aziridine and its derivatives, cyclopropane and its derivatives and halogenated carboxy to synthesize sulfoether compounds in a queous media.

含水介质中有机硫化合物的合成方法，本发明属于有机合成方法，用硫缩烯酮类化合物与羰基化合物、缩醛/酮、腙、肟、脎、烯胺在含水介质中合成缩硫醛/酮化合物，与α-羟基醛/酮或α-卤代醛/酮在含水介质中合成噻烯类衍生物，与α，β-不饱和羰基化合物、碳碳叁键、碳氮叁键、碳碳双键、氮氮双键、碳氮双键、碳硫双键、环氧乙烷及其衍生物、氮杂环丙烷及其衍生物、环丙烷及其衍生物、卤代烃等在含水介质，中合成硫醚化合物。

Generally, these compounds are derived from accessible α–oxoketen dithioacetals and the common methods of preparation involve regioselective sodium borohydride 1,2-reduce of α–oxoketen dithioacetals, 1,2-nucleophilic addition of organomatals such as organomagnesium, organolithium, Reformatsky regent to α–oxoketen dithioacetals, Baylis-Hillman reaction between polarized ketene dithioacetals and aldehydes.

主要方法包括：使用硼氢化钠1，2-选择性还原α-羰基二硫缩烯酮；利用有机金属化合物（如有机镁试剂，有机锂试剂，Reformatsky试剂等）对α-羰基二硫缩烯酮进行1，2-亲核加成；通过α-羰基二硫缩烯酮与芳醛进行Baylis-Hillman反应等获得。

A plausible process of this reaction is as following: Aldehyde was in equilibrium with the enol form, aldehyde reacted with aniline catalyzed by 2,2,2-trichloroacetic acid to afford imine, the generated imine immediately reacted with enol to form intermediate via intramolecular cyclization.

我们发现一分子芳基叠氮和一分子三苯基磷反应生成一分子磷亚胺，后者与由两分子取代的苯氧乙酰氯原位生成的烯酮反应生成4-亚烷基-β-烷基-内酰胺，其串联过程涉及烯酮亚胺的形成及其与烯酮的[2+2]的环加成反应。

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。