The synthesis of furil from 2-furaldehyde using VB1 as the catalyst and CuSO4.5H2O-pyridine as the oxidant was studied.

以糠醛為原料2020亚洲欧洲自拍偷拍视频，VB1為催化劑黄色三级日本，利用安息香縮合反應(yīng)合成糠偶姻无码少妇一区二区三区av，再用硫酸銅-吡啶氧化得到糠偶酰国产精品久久久久久精品另内。

The pyridine hemochrome spectrum indicated the presence of protoheme Ⅸ as the prosthetic group.

吡啶血色素光譜顯示了酶分子以原卟啉Ⅸ作為輔基。

Preliminary bioassay showed that all the synthesized compounds just showed a poor inhibition rate (0~45%) at 500 mg/L, much weaker than (72%~87%). The result suggested that chloro-atom on 2-position of pyridine ring may be indispensable for herbicidal activity.

初步除草活性測定結(jié)果表明www.凹凸视频.com，在500mg/L劑量下黄网视频，所有化合物的除草活性（抑制率0~45%）遠(yuǎn)低于先導(dǎo)化合物（抑制率72%~87%），說明吡啶環(huán)2-位上的氯原子可能對(duì)維持該類化合物的除草活性是必需的先锋资源综合。

In contrast to S- and O-heterocyclic compounds, increasing ionic strength reduced the sorption of ionizable N-heterocyclic compounds (pyridine, 2-methylpyridine, quinoline, 2-methylquinoline, and isoquinoline), due to increased electrostatic competition by cations.

對(duì)比硫和氧類雜環(huán)物質(zhì)性香港XXXXX免费视频播放，提高離子強(qiáng)度會(huì)減少雜環(huán)化合物的吸收（吡啶、2甲基吡啶欧美久久黑人一级c片、喹啉、2甲基喹啉和異喹啉）這主要是由于陽離子的靜電競爭5555视频在线观看。

In this thesis, five polydentate ligands including azido, oxalate, terephthalic acid, isophthalic acid and Pyridine-2,6-dicarboxylic acid were used to construct new transition metal complexes (M = Ru, Fe and Zn). Eight new complexes as listed below were synthesized and fully characterized.

本論文以草酸根在国产线视频免费观看高清视频、疊氮根、對(duì)苯二甲酸黄片一级片看一下视频、間苯二甲酸和吡啶-2黄无遮挡高清无码网站，6-二羧酸等含O、N的多齒共軛配體為研究對(duì)象黄片在线直播观看入口，合成了以下八個(gè)結(jié)構(gòu)新穎的化合物欧美激情动图，并對(duì)它們的結(jié)構(gòu)和譜學(xué)性質(zhì)進(jìn)行了詳細(xì)的表征。

Methods: Co1umn: Berger PYR(Ethyl pyridine, 250mm×4.6mm, 6μm); Mobile phase: CO2-methanol with 0.2% isopropylamine (77:23), Pressure: 100bar, Temperature: 35℃, Flow: 2.0mL/min, Detection wavelength: 225nm.

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Calculation showed t hat corrosion inhibition increased with the decrease of negative net charge of N atom; Efficiency of inhibition increased with the increase of negative net char ge of pyridine ring in isoquinoline molucular.

計(jì)算表明：隨著N原子負(fù)的凈電荷的減小人人草公开操，緩蝕效率提高；隨著異喹啉等分子的吡啶環(huán)負(fù)凈電荷的增大国内一级黄色a片，緩蝕效率增高美女扒开腿让我爽视频软件网站。

Using copper sulfate as catalyst, pyridine-3, 4-dicarboxylic acid was synthesized by oxidizing isoquinoline with concentrated nitric acid at high temperature, and the yield was 71.4%.

在鉬酸銨存在下，采用固相烘焙法久久伊人av无码毛片，2欧美一级特黄大片色欧美精，3-吡啶二甲酸和3，4-吡啶二甲酸分別與尿素和氯化亞銅作用得到了氮雜銅酞菁国产自产在线A级毛片。

Based on analysis of degradation and transformation of organic compounds in coke plant wastewater through every stage of the A 1 A 2 O biofilm system,several typical nitrogen heterocyclic compounds (pyridine,indole,quinoline,isoquinoline,2\|methyl quinoline and 8\|hydroxyl quinoline) in coke plant wastewater were selected for the study.

在對(duì)焦化廢水中有機(jī)物在A1 A2 O生物膜系統(tǒng)中降解轉(zhuǎn)化規(guī)律進(jìn)行分析的基礎(chǔ)上一级绝黄A片在线观看录像，選取焦化廢水中 6種主要的含氮雜環(huán)化合物：吡啶、吲哚黄色不卡av在线、喹啉九九热线精品视频16首页、異喹啉、2 甲基喹啉亚洲免费视频一区、8 羥基喹啉国产美女真人在线，與苯酚共同配制成溶液，在A1 A2 O生物膜系統(tǒng)中運(yùn)行黄色一二区在线播放，結(jié)果表明上述幾種含氮雜環(huán)有機(jī)物在A1 A2 O系統(tǒng)中都可得到較完全的去除欧美自慰。

Pymetrazine is chosed as the lead compound, and 21 compounds were firstly designed and synthesized. These compounds were characterized by introducing phenyl derivatives with different functional groups to replace pyridine ring with the isosteric principle and the method of homogeneous synthesis and reasonable biologically designing in order to find new compounds with potential biological activity. These compounds were confirmed by IR, H NMR and MS spectra.

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