We have carried out phase polymorphism studies of 4-n-hexadecyloxybenzoic acid (16OB) in temperature range: from 10 to 150 掳C with the use of Differrential Scanning Calorimeter, Thermal Microscopic Polarization and Transmitted Light Intensity. 16OB is a liquid crystal...
Hadgraft, ATR-FTIR spectroscopic investigations on the effect of solvents on the permeation of benzoic acid and salicylic acid through silicone membranes, ... M Dias a,S.L Raghavan b,J Hadgraft b - 《International Journal of Pharmaceutics》 被引量: 67发表: 2001年 Preparation and characterizatio...
3-Amino-benzoic acid View entire compound with spectra: 7 NMR, 9 FTIR, 2 Raman, and 11 MS (GC) SpectraBase Compound ID 4AmFnViyeJu InChI InChI=1S/C7H7NO2/c8-6-3-1-2-5(4-6)7(9)10/h1-4H,8H2,(H,9,10) InChIKey XFDUHJPVQKIXHO-UHFFFAOYSA-N Google Search Mol Weight 137.14 ...
陈皮产地鉴别ftir挥发油光谱学 FTIR对不同产地陈皮的鉴别研究 第27卷,第12期 2007年12月 光谱学与光谱分析Vo1.27,No.12,pp2453—2455 SpectroscopyandSpectralAnalysisDecember,2007 FTIR对不同产地陈皮的鉴别研究 周欣,孙素琴,黄庆华 1.广东药学院药物分析系,广东广州510006 2.清华大学化学系,北京100084 摘要采用傅里...
Benzoic acid dimerTemperature-dependent \\{FTIR\\}Hydrogen-bondsMesophaseIn the present paper, three kinds of benzoic acid, 4-allyloxylbenzoic acid (ABA), 4-allyloxyl-2-fluorobenzoic acid (AFBA) and 4-allyloxyl-2, 6-difluorobenzoic acid (ADFBA) have been studied by polarizing microscope (...
The calorific value was determined as the increase in the temperature of the water as a direct measure for the internal energy of the burning reaction in the decomposition vessel via an isoperibolic automatic procedure. Benzoic acid tablets were used as the standard (net calorific value: 26457 ...
FT-IR是表征物质微观结构特别是化学结构的方便快捷方法 FT-IR是鉴定未知物的首选分析手段 适用性广，积累的方法丰富 10/20/20201:47PM 3 课堂内容 1.基本概念 2.物理原理3.FT-IR仪的结构与测量原理4.基团特征频率及影响因素5.FT-IR在聚合物中的应用6.FT-IR最新发展 10/20/20201:47PM 4 1.基本概念 10/...
The major components present in vegetables and fruits were Benzoic acid (7.73%), Lupeol (13.44%), 1-Eicosene (11.49%), N-Tetratetracontane (8.41%), 2-Pentadecanone, 6,10,14-trimethyl (9.33 %), Hexadecanoic acid methyl ester (12.89%), Nonadecane (12.19%), 3-Buten-2-one, 4-(2,6...
, respectively. Glucose was found to be the dominant sugar with a concentration of 41.3 and 51.6 g × 100 g−1in HFCh and HBlu, respectively. 3-Phenyllactic acid and ferulic acid were most frequently found in HFCh powder, whereas m-coumaric acid, benzoic acid, and cinnamic acid ...
The first local minimum of the formic acid dimer exhibits simultaneously red-shifted O–HO and blue-shifted C–HO hydrogen bonds. The improper, blue-shifted hydrogen bond was investigated by means of the NBO analysis, rehybridization mod... Jana Chocholouová,Vladimír pirko,P Hobza - ...