Keywords isopropenyl acetate;acetyl acetone;vapor-liquid equilibrium

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Results:There was no significant difference in mensuration between microwave disgestion-acetylacetone-formaldehyde spectrophotometry method and international standard Kjeldahl determination.

結(jié)果：微波消解-乙酰丙酮甲醛分光光度法與國(guó)標(biāo)凱氏定氮法相比測(cè)定結(jié)果差異無(wú)顯著性伊人久久五月丁香综合中文亚洲，該方法線性范圍在5~100μg/10 m l日韩在视频，相關(guān)系數(shù)r=0.9997日韩电影精品午夜在线播放，檢出限為0.546μg/10 m l一级黄色片在线观看，相對(duì)標(biāo)準(zhǔn)偏差為1.29%~2.21%，加標(biāo)回收率

The graft copolymerization of vinyl monomer onto carbon black with,respectively,ceric ions, n butylithium,acetylacetonate copper complex and manganic pyrophosphate complex as initiator were studied.

討論了分別在鈰離子體系女人被爽到呻吟的网站，正丁基鋰體系欧美三级手机在线看，過渡金屬離子乙酰丙酮銅以及焦磷酸絡(luò)錳體系的作用下，炭黑與乙烯基單體的接枝聚合。

In the paper, a series of metallorganic compounds have been studied by the quantum-chemical calculation with proper basis sets, including:1. a series of carbonyl complexes.2. dibenzene chromium and its derivatives3. ferrocene and its derivatives4. a series of metallic complexes with acetylacetoneWe optimized the geometric configurations of a series carbonyl complexes including Ni4 Fe5, Cr6 with density functional theory B3LYP method at the different levels and confirmed the stable geometry by vibrational analyses. Then we calculated the nuclear magnetic resonance spectra with GIAO method provided by GAUSSION98 program at the different levels.

本文用量子化學(xué)計(jì)算程序日韩午夜三级片，用密度泛函B3LYP方法亚洲激情国产一区精品，在恰當(dāng)基組水平上，用GAUSSIAN98程序提供的GIAO方法研究了系列金屬有機(jī)化合物的核磁共振譜：一丰满熟女456视频、羰基配合物系列：二人人干人人操在线、二苯鉻及其衍生物系列：三、二茂鐵及其衍生物系列：四日韩欧美午夜在线、乙酰丙酮的配合物系列：我們用密度泛函B3LYP方法精品国产点击网站，在不同基組水平上對(duì)第一過渡系羰基化合物的系列配合物進(jìn)行了結(jié)構(gòu)優(yōu)化，通過振動(dòng)分析確定其穩(wěn)定構(gòu)型亚洲978eee，然后再用密度泛函B3LYP方法在不同基組水平上色一情一乱一伦一区二区三欧美，用GAUSSIAN98程序提供的GIAO方法計(jì)算其核磁共振譜。

Catalytic oxidation ; p nitrotoluene ; p nitrobenzoic acid ; Co 2

催化氧化欧美最新视频；對(duì)硝基甲苯成年人看免费视频大；對(duì)硝基苯甲酸；乙酰丙酮鈷

Octylene was synthesized via tetramerization of ethylene at the presence of a catalyst system consisted of chromium acaet as primary catalyst, methylaluminoxane as cocatalyst, bis amine as ligand under high pressure. The effects of different PNP ligands on catalyst activity and selectivity to 1-octene were investigated.

在乙酰丙酮鉻欧美第一页激情视频、甲基鋁氧烷2021无码影片、配體三元催化體系中，以乙烯為原料在高壓下齊聚生成1-辛烯操她网址，主要考察N原子上取代基不同的PNP配體對(duì)催化劑活性及1-辛烯選擇性的影響自拍日韩中文无码视频。

Serum total cholesterol was determined by isopropanol withdrawing and ferric-glacial acetic acid -sulfuric acid developing method, serum triglyecride by isopropanol withdrawing and acetylacetone developing method,serum high density lipoprotein-cholesterol by magnesium phosphotungstate mehod, respectively. Serum low density lipoprotein-cholesterol was calculated by the equation: LDL-C=TCh--0.2 TG.

采用異丙醇抽提、三氯化鐵-冰醋酸-硫酸顯色法檢測(cè)血清總膽固醇欧美激情aⅴ变态另类第十页，用異丙醇抽提特级性爱图、乙酰丙酮顯色法檢測(cè)血清甘油三酯，用磷鎢酸鎂法檢測(cè)血清高密度脂蛋白-膽固醇天天狠天天透天干天干2020，用等式LDL-C=TCh--0.2TG計(jì)算血清低密度脂蛋白-膽固醇久久在99。

With the in-situ single-stage self-metallization protocol,surface-silvered polyimide film has been prepared using pyromellitic dianhydride/ 4,4\'-oxydianiline-based polyimide as the matrix and (1,1,1-trifluoro-2,4-pentadionato)silveras the silver precursor.

在原位一步自金屬化法中，以均苯四甲酸酐/4a成人黄色网站视频免费，4\'-二胺基二苯醚基聚酰亞胺為基體欧美黄色一级网站，以三氟乙酰丙酮銀作為銀的母體制備出了表面金屬化的聚酰亞胺銀復(fù)合薄膜。

The results show that the zirconium sol has good spinnability when n: n= 1:3, reaction time is 6h and aging temperature is 15℃. The ZrO_2precursor fibers are made from hydrous zirconia chelated by acetylacetone. The sintercd fibers arecomposed of metastable tetragonal phase and sized about 15μm in diameter. Moreover, there aremany pores inside the fibers, but no cracks.4. ZrO_2/PVP hybrid fibers were prepared by blending the spinnable zirconium sol and 10 wt%PVP solution.

結(jié)果表明久久线视频，當(dāng)n(ZrOCl_2·8H_2O)：n(H_2O_2)=1：3先峰资原吧，反應(yīng)時(shí)間6h，陳化溫度15℃時(shí)可得紡絲性能良好的鋯溶膠欧美人成视频在线，ZrO_2前驅(qū)體連續(xù)纖維的組成主要為經(jīng)乙酰丙酮配位的ZrO_2水合物黄片儿小视频，熱處理后的ZrO_2纖維的相結(jié)構(gòu)為亞穩(wěn)四方相，纖維的直徑為15μm左右天堂AⅤ久久天堂天天看，纖維中存在大量的納米級(jí)氣孔自拍偷拍毛片，但無(wú)明顯裂紋。4。

Fibrous hydrous zirconia, spinnable hydrous zirconia chelated by acetylacctone and modifiedhydrous zirconia were synthesized from zirconium oxychlorid(ZrOCl_2·8H_2O) and then applied toprepare ZrO_2/PVA electrospinning hybrid fibers, ZrO_2/PVA continuous hybrid fiber and ZrO_2/PVPhybrid microsphere respectively. The chemical structure, properties, microstructure and formationmechanism of the corresponding materials were investigated.

論文以無(wú)機(jī)鹽ZrOCl_2·8H_2O為原料QVOD经典激情视频图片小说，合成出纖維狀的ZrO_2水合物超污国产黄网站在线观看、乙酰丙酮配位的可紡性ZrO_2水合物和正丁醇改性的ZrO_2水合物，分別與PVA和PVP雜化復(fù)合超碰在线免费，制備出ZrO_2／PVA雜化電紡纖維人人操人操人人射、ZrO_2／PVP雜化連續(xù)纖維和ZrO_2／PVP雜化微球，并對(duì)相關(guān)材料的組成狼友网免费卡、結(jié)構(gòu)最新囯产福利在线观看精品、性能及形成機(jī)理等進(jìn)行了深入分析和研究。