环烷

Results Seven known compounds: ocotillol (1), ursolic acid (2), betulin (3), lupeol (4), 1β-hydroxy-lupeol (5),β-sitosterol (6) and sitosterol-4-en-3-one (7) were isolated.

结果 分离得到7个化合物，分别鉴定为：20S，24R-环氧达玛烷－3β，25-二醇(ocotillol， 1)、熊果酸(2)、白桦脂醇(3)、羽扇豆醇(4)、1β-羟基羽扇豆醇(5)、β-谷甾醇(6)、谷甾－4-烯－3-酮(7)。

Seven derivatives of 1,3- dithiocyclohexane were prepared via the reaction o f 7 aldehydes with Bunte′s salt prepared from 1,3-dichloroprop ane and sodium thiosulfate.

国内外关于 1， 3 二硫环己烷类化合物的合成已有大量报道 [5~8]，但反应条件较苛刻，一般都在-18~78℃之间，而且一种方法只能合成一种物质。

Thermal decomposition of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine in condensed state heated with 5 ℃min^(-1), 10 ℃min^(-1), 20 ℃min^(-1) and 40 ℃min^(-1), respectively, was investigated by in-situ FTIR spectroscope.

采用原位红外光谱研究了炸药1，3，5，7-四硝基－1，3，5，7-四氮杂环辛烷在5，10，20，40℃min^(-1)四种不同升温速率下的热分解行为。

Further study indicated that HI117 and SJ9A4-induced Fg binding was reduced by pretreatment of platelets with sphingosine, aspirin, apyrase, and/or PGI2. Conclusion The anti-CD9 McAbs, HI117 and SJ9A4, can reversibly expose platelet Fg receptors, probably via three signaling pathways, i.e.

HI117和SJ9A4均能诱发血小板膜Fg受体暴露，两者诱发人血小板Fg受体暴露可能是三条途径综合作用的结果：即二磷酸腺苷释放、血栓烷生成和环磷酸腺苷途径，而PKC激活可能是三条途径的共同通路。

Polydimethyl siloxane, polydimethyl siloxane, sodium acrylate/sodium acryloyldimethyl taurate copolymer, isocetane, sorbitan ester-80, PCA sodium, ethanol, menthyl lactate, spicery, Contain Bulgaria wild rose pistil extract with tendering formula, moisturize and nourish skin, strengthen the firmness and toughness of eye skin, and recover eye skin to moist, firm, tender and bright state.

环聚二甲基硅氧烷、聚二甲基硅氧烷、丙烯酸钠/丙烯酰二甲基牛磺酸钠共聚物、异十六烷，聚山梨醇酯-80、PCA 钠、乙醇、薄荷醇乳酸酯、香精、蕴含自保加利亚野生玫瑰精华成份调和而成的嫩肤配方，保湿滋养，增强眼部弹性及韧性，回复眼部肌肤柔润、富有弹性，令眼部肌肤幼滑紧致、水嫩柔润、神采明亮。

Seven series of monoethylalkanes found in the soil can also be detected in the stalagmite and they exhibit the same distribution patterns.

烷基环己烷的分布在土壤与石笋中呈现了相似的分布模式，但是主峰碳数有所变化，高碳数部分与低碳数部分的相对含量也发生了变化。

In the second part, the active tautomer of the HPPD inhibitor, 2-[2-nitro-4--benzoyl]-1,3-cyclohexanedione was studied bythe quantitative structure-activity relationship.

其后，我们利用三维构效关系对HPPD酶的高效抑制剂2-(2-硝基-4-三氟甲基苄基)-环己烷-1，3-二酮的活性结构进行了研究。

In these solvents there is an equilibrium for 2-(2-mercaptophenyl)benzoxazole in the ground state between E1 and K, and the equilibrium shifts toward the tautomer K as the polarity of the solvent increases.

在溶液中，随着溶剂极性的增强，醇式异构体E1与K之间的反应平衡向K方向移动，在非极性溶剂环己烷中， E1为优势构型，而在强极性水溶液中， K为优势构型。

Using a phase equilibrium apparatus, the solubilities of anthracene and carbazole in dimethyformamide, N-methylpyrrolidinone, cyclohexanone, xylene, dichloroethane and tetrachloroethylene were determined and solubility curves were drawn, providing useful data for crude anthracene processing.

利用液固相平衡实验装置，测定了蒽和咔唑在二甲基甲酰胺、N-甲基吡咯烷酮、环己酮、二甲苯、二氯乙烷和四氯乙烯中的溶解度，并作出溶解度曲线，为粗蒽的分离和精制提供了有用数据。

METHODS With thymol and bupivacaine as the internal standards for propofol and lidocaine respectively,the extraction was performed with cyclohexane.

以麝香草酚和布比卡因分别为异丙酚和利多卡因的内标，样品用环己烷提取。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失