Other aromatic compounds such as toluene, diphenylmethane and 1,1,2-triphenylethane were also deuterated smoothly in C6D6 within 24 h at room temperature.

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The adsorption properties of 2-naphthalenesulfonic acid, p-tuluenesulfonic acid, p-chlorobenesulfonic acid and 4, 4'-dinitrostilibene-2, 2'-disulfonic acid onto the macroporous weak base anion-exchange resins were investigated. The influence of pH, salt and temperature on the adsorption equilibrium was also studied.

本論文以芳香磺酸化合物為研究對象爱搞视频在线，系統(tǒng)地研究了大孔弱堿性陰離子交換樹脂對其的吸附行為制服丝袜熟女一区二区，考察了溫度、pH值综合激情2、鹽含量等因素對樹脂吸附性能的影響十八禁网站免费观看。

The organoboron compounds in this paper are based on triarylboranes, boronic acids and boronic esters. The structure-property relationship and sensing mechanism are elucidated. Organoboron compounds as Lewis acid can be used as fluoride probe with high sensitivity and selectivity because they have a unique LUMO in which the π-conjugation is divergently extended through the vacant p-orbital of the boron atom. The complexation of the boron π-electron systems with fluoride ion would interrupt the π-conjugation extended through the boron atom, causing the change of photophysical properties.

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The spatial distribution dispersion rules of Evodia meliaefolia population and Camellia oleifera population were also analyzed by using the geographic information system software Arcview3.2 assembled with R2V by the way of substituting temporal change with spatial difference.

本文以位于廣州市內(nèi)的白云山風景名勝區(qū)森林植被中的芳香植物楝葉吳茱萸群落為研究對象欧美亚洲中文激情，在調(diào)查樣地設(shè)置50個10 m × 10 m的樣方，應(yīng)用相鄰格子法進行調(diào)查亚洲另类网站，對楝葉吳茱萸群落的組成及結(jié)構(gòu)特征草草在线高清视频、主要樹種的分布格局類型進行了分析；采用R2V永久AⅤ视频在线播放、Arcview3.2等地理信息系統(tǒng)軟件以&空間差異替代時間變化&的方式青草精品免费视频，對楝葉吳茱萸和油茶種群空間擴散規(guī)律進行模擬分析，從而探討森林景觀的物種流功能国产强轮奸在线观看。

To test this hypothesis, we measured the effect of IV infusion of the NMDA blockers dizocilpine (MK-801) and-4-(3-phosphonopropyl) piperazine-2-carboxylic acid to decrease the MAC (the minimum alveolar concentration of anesthetic that prevents movement in 50% of subjects given a noxious stimulation) of 8 conventional anesthetics (cyclopropane, desflurane, enflurane, halothane, isoflurane, nitrous oxide, sevoflurane, and xenon) and 8 aromatic compounds (benzene, fluorobenzene, o-difluorobenzene, p-difluorobenzene, 1,2,4-trifluorobenzene, 1,3,5-trifluorobenzene, pentafluorobenzene, and hexafluorobenzene) and, for comparison, etomidate.

為了驗證這個假說亚洲,欧美日韩在线观看，我們檢測靜脈注射 NMDA 阻滯劑 MK-801和 CPP 來降低8種常規(guī)吸入麻醉藥（環(huán)丙烷，地氟醚超碰操人妻网，安氟醚日韩裸体美女福利电影在线观看网站，氟烷，異氟醚A级片，一氧化二氮欧美午夜天堂，七氟醚和氙）和8種芳香族化合物（苯男人天堂AV综合网，氟苯，鄰二氟苯亚洲第一区第二区在线，對二氟苯体内射精视免费网站， 1，2国产三级黄片视频，4-三氟苯， 1一级A片中文字幕性色，3免费看在线a片，5-三氟苯，五氟苯和六氟苯的 MAC 值18禁止在线，依托咪酯作為對照組外国黄色网址。

It was found that the more easily systhesized and stable N, N-acetal or N, Ohemiacetal can replace N-tosyl imino ester to react with phenols in the presence of TiCl〓, and α-arylglycine derivatives were also obtained in high yields and high regioselectivity.

進一步研究發(fā)現(xiàn)，更易合成的N91国内在线高清，N-或N国产又黄又爽又色又湿，O-縮醛可以作為亞胺酯的替代物和酚類化合物發(fā)生傅克反應(yīng)。路易酸TiCl〓能有效地促進酚類化合物和亞胺酯的傅克反應(yīng)較高產(chǎn)率免费特黄一级欧美片久久久久、較高區(qū)域選擇性的得到2-羥基α-芳香甘氨酸衍生物欧美美女高潮潮喷。

In addition, ioding was found to be an efficient catalyst for the imino Diels-Alder reaction of N-arylimine and enol ethers and the reaction provided tertrahydroqinolines in good yields. One pot synthesis of tetrahydroqinolines from aldehyde, aniline and enol ethers was also achieved using iodine as the catalyst. The chemical yield of the"one pot"reaction was comparable with that obtained using preformed N-arylimine.

此外我們也發(fā)現(xiàn)碘能夠有效地催化N-芳基亞胺與烯醇醚的Diels-Alder反應(yīng)，以很高的化學收率得到了四氫喹啉衍生物一级黄色网站视频免费，并且發(fā)現(xiàn)碘也能夠直接催化芳香醛裸体美女成人性大片视频播放网站、苯胺、烯醇醚的三組分&一鍋&反應(yīng)人人艹网站，獲得的化學產(chǎn)率與使用預(yù)制的N-芳基亞胺相當你懂得在线电影。

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

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Hope to have more and more words like these can be turned into memories,slowly slowly memoried to permanent.

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Nevertheless, the yield of pinacol was also strongly affected by the steric environment surrounding the carbonyl group. The pinacol coupling of aromatic aldehydes has been achieved with high yields under such a condition. However, the diastereose-lectivities of pinacols were not satisfying. Unfortunately, the ketones and most aliphatic aldehydes appeared inert under the same reaction conditions.

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