In experimental research, the S-L-E of three groups of isomers was determined by using differential scanning calorimetry , and more than two hundred reliable data were obtained. The isomers include meta-, ortho-, and paradichlorobenzene, meta-, ortho-, and para-dibromobenzene and meta-, ortho-, and para-nitro-benzoic acid.

在實(shí)驗(yàn)的研究中中文字幕第二一区，采用差式掃描量熱測(cè)定了鄰欧美激情四射三级网站、間成年人福利视频、對(duì)二氯苯欧美一级高潮片黑人录像，鄰激情综合婷婷丁香五月,国产老妇、間欧洲一级AA片片免费观看、對(duì)二溴苯及鄰、間黑人精品一区二区三区不卡、對(duì)硝基苯甲酸等三組同分異構(gòu)體物系的固液相平衡關(guān)系欧美大胆a国产真实乱子伦级，共得到二百多個(gè)可靠的數(shù)據(jù)。

It is shown that mixed tolyl arsonic acid was much superior to either para- or ortho-isomer alone for cassiterite flotation.

當(dāng)混合比為45：55時(shí)男女晚上在床做gif图片视频，錫石產(chǎn)率出現(xiàn)"峰值"美女性爱毛片，可得到較高的浮選指標(biāo)亚洲一区二区久久。

This process utilizing modern efficient wire gauze wave-like packings sepa-rates three isomers of MNT(ortho-.meta- or para-), then the O-MNT or P-MNTis nitrated to produce military TNT by a mixture of nitric and sulfuric acid.

本工藝?yán)媒咝У慕饘俳z網(wǎng)波紋填料分離MNT的三種異構(gòu)體，然后用硝硫混酸把鄰一或?qū)σ籑NT硝化成軍品TNT午夜无码福利黄色片，這樣可避免亞硫酸鈉溶液精制TNT的工序国产免费A片视频在线不卡。

It is shown that mixed tolyl arsonic acid was much superior to either para- or ortho-isomer alone for cassiterite flotation.

當(dāng)混合比為45：55時(shí)，錫石產(chǎn)率出現(xiàn)&峰值&欧美自21页，可得到較高的浮選指標(biāo)我要要看国产免费黄色视频。

After acid hydrolysis of urine, primary amino acids were derivatized with ortho-phthaldialdehyde and removed from the sample by use of silica gel, followed by devivatized of hydroxyproline with 9-fluorenylmethyl chloroformate, and then injected into a C8 reversed-phase column.

采用鄰苯二甲醛和芴甲基氯甲酸酯兩個(gè)衍生劑，先后處理尿標(biāo)本欧美一级啪啪大片，以國(guó)產(chǎn)C8柱為固定相在线男人的天堂，在醋酸鈉緩沖液中加入23%的乙腈作為洗脫液，3国产精品视频福利一区二区，4-脫氫脯氨酸作為內(nèi)標(biāo)免费不卡无码一级毛片。

The optimum reaction conditions were: at present of acetic anhydride, a stoichiometric quantity of nitric acid, at room temperature for 40 minutes. Nitration of chlorobenzene gave a,50% yield of mononitro compounds, and an ortho-para isomer ratio 0.20 in product distribution of chlorobenzene mononitration.

結(jié)果表明：硅鎢酸催化性能較好，催化劑載體以納米二氧化硅最好2020黄色网站直接观看，反應(yīng)條件中醋酸酐用量是主要影響因素亚洲人性爱特别黄色视频；SiW_(12)O_(40)~(4-)／納米SiO_2催化劑具有強(qiáng)對(duì)位選擇性：在醋酸酐存在下，氯苯與等當(dāng)量的硝酸室溫下反應(yīng)40分鐘国产品一级欧美在线观看最黄，氯苯一硝化產(chǎn)物中鄰／對(duì)硝基氯苯異構(gòu)體的質(zhì)量比達(dá)0.2一级在线观看，產(chǎn)率可達(dá)50％。

The results indicate that the imprinted polymers synthesized by methacrylic acid as functional monomer exhibite the best regioselectivity, yielding up to 49.6% pare and 44.1% ortho isomer of nitrotoluene.

結(jié)果顯示分子印跡聚合物提高了甲苯的對(duì)位選擇性硝化能力日本特级永久黄色网站?，并且以甲基丙烯酸為功能單體的分子印跡聚合物的對(duì)位選擇性最好中文欧美，鄰對(duì)比為0.89。

The decrease of interaction intensity of benzoic acid was observed by introducing hydroxyl at its ortho position.

鄰位羥基的存在使得苯甲酸與蒽的作用強(qiáng)度明顯降低最新黄视频网站。

And the ability of antioxidant of polyhydroxy benzamides don't have too many differences with Trolox (IC50 =13.90 μg/ml), the substition of hydroxy group at amino benzene ring doesn't affect the whole ability of antioxidant apparently, but while the single hydroxy group at carboxylic acid benzene ring, they are apparently decrease to scavenge the ability of free radical, as a result, the hydroxy at amino benzene ring substitutes its function, without the hydroxy group, the ability of antioxidant is worst, but it upgrades its function while the hydroxy and amino are in the ortho-position or para-position.

而當(dāng)多酚醯胺化合物其抗氧化能力與Trolox差不多時(shí)(IC50 =13.90 μg/ml)国产呦在线，胺基苯環(huán)上之羥基取代對(duì)整體抗氧化能力影響不明顯，但在羧酸苯環(huán)上具單羥基時(shí)久久国内精品视频，其清除自由基能力明顯下降日韩精品草草视频在线播放，使得胺基苯環(huán)上羥基取代發(fā)揮了影響力，無(wú)羥基取代時(shí)免费毛片在线视频观看，抗氧化能力最差精品免费观看视频在线，而羥基與胺基互為鄰位或是對(duì)位時(shí)較間位有提升效果。

The results show high selectivity when the temperature is controlled at 50 CC , and the nitrated reaction time is 90 mm, toluene is nitrated by using 95% nitric acid as nitrating reagent at the presence of acetic anhydride, 1.0g silicotungstic acid catalyst is calcinated at 300℃ for 1.5h. The o/p (ratio of ortho to paro isomer of toluene nitration) ratio is 0.89 in product distribution of toluene nitration, lower than 1.67 using sulfonitric acid as catalyst. The yield of products is 91.6%.

結(jié)果表明99视频在线免费，在醋酐存在條件下黄色动图视频，以CCl4為溶劑，以質(zhì)量分?jǐn)?shù)為95%的硝酸為硝化劑欧美精品永久在线观看，反應(yīng)溫度控制在50℃欧美日韩国产精东，反應(yīng)60 min， 1.0g經(jīng)300℃焙燒1.5h后的硅鎢酸催化劑，對(duì)甲苯表現(xiàn)出強(qiáng)的區(qū)城選擇性影音先锋在线观看日韩AV，甲苯硝化產(chǎn)物o/p值（甲苯硝化產(chǎn)物鄰位和對(duì)位異構(gòu)體的質(zhì)量比）達(dá)0.89日韩天天天添日日，較硝硫混酸的1.67顯著降低，產(chǎn)物收率達(dá)到91.6%国产91久久久久久。