With the occurrence of H2/Pd-C and ethyl formic ester,the reduction of the nitro group and the formylation of the amino group could be finished in one step.

但是在甲酸乙酯存在下，用H2/Pd-C對Ⅶ的硝基進行還原2017av在线视频，得到的Ⅷ中的氨基可當(dāng)即被甲跆焯蒙谙叻掷啵化，使由Ⅶ到Ⅳ的兩步反應(yīng)一步完成一区二区毛片视频在线。

Moreover, the effects of the molar ratios of the reagents on the yield are examined. The best molar ratios are a 2.0 molar equivalence of thionyl chloride and a 3.0 molar equivalence of paminophenol to retinoic acid, and the total yield is 80.7%.

此外在线鲁，研究了反應(yīng)試劑的摩爾比對反應(yīng)收率的影響，最佳摩爾比為二氯亞砜和對氨基苯酚物質(zhì)的量分別是維甲酸物質(zhì)的量的2倍和3倍欧美一级片综合操，總收率為80.7%色色视频看片。

Part two: Using chloroformic ester reacted with potassuim thiocyanate to get thiocyanic esters. Then reacted with biological substituted pyrimidinamine to synthesize forty two thiourea compounds, thirty eight of them are new compounds. Their structures have been charactered by IR, 1H NMR and elemental analysis.

第二部分：先以氯甲酸酯和硫氰酸鉀為原料合成異硫氰酸酯，再與有生物活性的取代氨基嘧啶反應(yīng)另类图片亚洲色图，合成了一系列新的取代嘧啶基硫脲類化合物人妻Av洒巴，合成的42個化合物中有38個為首次合成的新化合物，結(jié)構(gòu)經(jīng)元素分析欧美精品视频二区免费播放、IR及~1H NMR得到確證亚洲亚洲人综合网站图片。

Aim To study the relationship between the structures of a series of 4,4-diaryl-3-butenyl derivatives of nipecotic acid and guvacine and their inhibition activity of the γ-aminobutyric aciduptake.

目的研究3-哌啶甲酸和四氫煙酸的4，4-二芳基-3-丁烯衍生物結(jié)構(gòu)和對γ-氨基丁酸攝取抑制活性之間的關(guān)系av.bbixx。

The effects of imidization method,coagulation bath and temperature were studied on the structure and separation performance of polyimide membrane,prepared by using pyromellitic dianhidride and 4,4′-oxydianiline as raw materials.

針對以均苯四甲酸二酐和4欧州A片网址， 4′-二氨基二苯醚為原料合成聚酰亞胺的過程，研究了亞胺化方法男人女人爽到高潮视频真人版、凝膠浴組成與溫度等條件對膜的結(jié)構(gòu)和分離性能的影響日本二区三区欧美亚洲国产。

A high temperature resistant polyimide adhesive agent was synthesized by pyromellitic dianhydride and 4,4-diamino diphenyl ether in order for the self-adhesion of aero dynamo magnetic steel plates.

為解決國內(nèi)無法生產(chǎn)航空電機用自粘磁鋼片的難題，用均苯四甲酸二酐和二氨基二苯醚合成一種耐高溫聚酰亞胺粘合劑欧美福利片500，配合相應(yīng)的處理工藝欧美亚洲福利，制成一種耐250℃的自粘性磁鋼片，成功應(yīng)用于航空欧洲黄色视频在线观看、航天等高科技領(lǐng)域欧美精品熟妇人妻在线视频。

A silver ion selective electrode was prepared and characterized with trimethylene bis (N-ethyl-N-phenyldithiocarbamate) as ionophore.

制備并考察了以雙（N-乙基－N-苯基氨基二硫代甲酸）1，3-丙二醇酯為載體的銀離子選擇電極的性能AAA片免费不卡。

The good results can be obtained with the newalgorithm; the local minimal can be avoided in some degree. In this paper, neural networks also were applied to quantitativestructure-property relationships analysis:1Studies on the toxicity of aniline, nitrobenzene and phenol derivatives and their structures.2 Studies on HEPT compounds for their anti-aids.3 Studies on nitrogen mustards and 2-formylpyridine thiosemicarbazone compounds for their anti-cancer.4 Studies on phenol and aniline derivatives for their gas chromatographic retention values.5 Studies on discrimination of tea by Self-organizing feature map network.

本論文還利用上述方法進行了一些定量結(jié)構(gòu)活性相關(guān)性研究中文字幕日本αv一区二区，主要內(nèi)容： 1環(huán)境中有毒有害有機物的定量結(jié)構(gòu)活性相關(guān)性研究。2抗艾滋病類藥物定量結(jié)構(gòu)活性相關(guān)性研究中文字幕无码字幕亚洲欧洲日韩。3抗腫瘤類藥物(氮芥子氣類化合物和2-甲酸吡啶縮氨基硫脲類化合物)定量結(jié)構(gòu)活性相關(guān)性研究黑人粗进欧美白妞。4苯酚和苯胺類衍生物色譜比移值預(yù)測。5將神經(jīng)網(wǎng)絡(luò)用于茶葉的分類人人干网站。

Three composites of the different fibers with epoxy resin matrix are prepared and the corresponding unilateral fiber reinforced winding ring specimens are fabricated. The mechanical poperties of the composites including tensile strength, modulus and three point interlaminar shear strength are tested.

據(jù)文獻 [2 ]介紹啪啪啪日韩，PBO(聚對亞苯基苯并雙口惡唑)是含雜環(huán)的苯氮聚合物的一種，它是采用二氨基間苯二酚和對苯二甲酸在多磷酸中聚合、采用空氣間隙濕法紡絲法進行紡絲而制得的日韩手机在线视频久操。