NMR分析相关论文
羟甲芬太尼(1)是一个强效的镇痛剂和高亲和、高选择性的阿片μ受体激动剂。通过HPLC和1HNMR分析,cis-A-l被确定为由等量的cis-(+)-(3R,4S,2'S)-l和:cis-(—)-(3S,4R,2'R)-1组成的外消旋体,cis-B-l被确定为由......
目的:采用1H-NMR技术从多成分角度分析30批市售狗脊饮片的质量差异,建立狗脊饮片质量控制的新方法。方法:采用主成分分析和偏最小......
目的:以姜黄素为模型药物,制备Pluronic F127聚合物的载药胶束并阐明Pluronic F127在水中的胶束化过程。方法:采用HPLC测定姜黄素......
本文合成了一系列3-(4’-取代苯亚甲基)-2-吲哚酮的E和Z几何异构体,并采用反相硅胶色谱的方法首次对所有异构体进行了成功分离。通......
Metabolomic Study on Vitamins B_1, B_2, and PP Supplementation to Improve Serum Metabolic Profiles i
Objective To explore metabolic changes after acute hypoxia and modulating effect of vitamins B1, B2, and PP supplementat......
本文阐述了一种定量测定无机氟的核磁共振新方法。该方法用样量少,检测灵敏度高可达90ng/0.5ml,且高效易行。......
P-phenylene-2,2'-bis(5-aminobenzoxazole) is synthesized by the condensation of 2,4-diaminophenol dihydrochloride and......
本文介绍了由二叔丁基过氧化物作引发剂,在偏氟乙烯(或称1,1-二氟乙烯(VDF))与六氟丙烯(HFP)溶液中进行的自由基共聚,研究了[VDF]o/[HFP]o初......
In order to understand the composition and structure of herbicidal active substance from the root of Flaveria bidentis(L......
这研究的目的是调查 hydrolyzed 产品的任务从人的血血浆提取了的原子磁性的回声(NMR ) 。在高度有毒的杀虫剂的化学、功能、结构......
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Effect of Alkali-NaOH Solution on the Nature of Synthesized Zeolite from 2:1 Tunisian Clays: XRD and
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Synthesis,Crystal Structure and Cytotoxic Activities of 1-(Prop-2-yn-1-yl)-7,8-dihydro-1H-benzo[d][1
The important synthetic precursor(Ⅲ), 1-(prop-2-yn-1-yl)-7,8-dihydro-1Hbenzo[d][1,3]thiazine-2,5(4H,6H)-dione(C_(11)H_(......
Effect of Specific Structure of Lotus Seed Oligosaccharides on the Production of Short-chain Fatty A
In order to study the structure of lotus(Nelumbo nucifera Gaertn) seed oligosaccharides and their effect on the prolifer......
The title compound 1β-hydroxydigitoxigenin(1) was isolated from the ethanol extract of the roots of Streptocaulon juventa......
A potential dual inhibitor(4) for exogenous absorption and endogenic synthesis of cholesterol was designed based on the ......
Phosphorus speciation in surface sediments of a hypertrophic lake,Southwestern China:insights from f
在表面沉积从的磷(P) 种类一浅, hypertrophic 湖,达恩奇湖,中国,被 P 分别调查并且 < 啜 class= “ a-plus-plus ” > 31 </sup > P ......
该书深入系统地论述了NMR谱学的全部内容。对氢谱、碳谱、二维谱、蛋白和核酸的NMR分析等问题作了深入的阐述。在1HNMR中,对氢谱涉......
六 eremophilane sesquiterpenes 从海洋的真菌毛丛 sp 被获得。BL27-2。他们的结构作为 3-acetyl-9 被阐明, 7 (11 )-dien-7-hydro......
对新生产的未经催陈处理的酒,自然陈酿的成品酒及经催陈处理的酒样,进行了核磁共振分析,分析结果表明,成品酒比新酒的△δ大,经电......
Preparative isolation of Heteroclitin D from Kadsurae Caulis using normal-phase flash chromatography
Heteroclitin D(H.D)was successfully isolated from Kadsurae Caulis by using flash chromatography and recryslallized by me......
研究出一种滴定浆料中残余木素游离酚基的化学方法,该方法具有快速测定和半定量的特点,其原理基于ClO2在O℃时与木素酚基单元的选择......
以质量分数为97.2%的脱氢芳樟醇为原料,198~202℃、常压条件下进行热环化反应,反应时间7.5 h,得到质量分数为94.0%的1-甲基-2-亚甲......
Influence of climate warming and nitrogen deposition on soil phosphorus composition and phosphorus a
温暖的气候和氮(N) 免职改变生态系统过程,结构,并且而磷(P) 作文和可获得性直接在 N 的条件下面影响生态系统结构,工作免职。在我们......
研究了聚丙烯酸羧基α-H的MANNICH反应,采用1H-NMR分析、13C-NMR分析及IR分析表征和验证了聚丙烯酸羧基α-H的MANNICH反应产物,并以此研究结果为依据,合成了选择填充型两......
Optimized geometry and harmonic vibrational frequency of 2-dicyanovinyl-5-(4- ethoxyphenyl)thiophene (C16H12N2OS) are ca......
研究了羟甲基三聚氰胺磺化阶段的pH值、温度和时间对磺化反应的影响,并采用13C-NMR分析了磺化的化学结构. 研究表明,在pH>11.5,温......
我们已经证实了测井资料的探询和分析可以用于核磁共振岩心分析和测井资料的综合分析。T2移动和变化率分析技术找到了影响核磁共振......