Near-infrared spectroscopy lipids

P. Moreno, R. Lodder, K. Purushothaman, et al.. Detection of Lipid Pool, Thin Fibrous Cap, and Inflammatory Cells in Human Aortic Atherosclerotic Plaques by Near-Infrared Spectroscopy, Circulation, 105, 923 (2002). 

P. R. Moreno, S. E. Ryan, et al.. Identification of Lipid-Rich Plaques in Human Coronary Artery Autopsy Specimens by Near-Infrared Spectroscopy, J. Am. Coll Cardiol, 37(Suppl 2), A356 (2002). 

K. Nakamichi, K. Suehara, Y. Nakano, K. Kakugawa, M. Tamai, T. Yano. Measurement of the concentrations of mannosyl erythritol lipid and soya oil in the glycolipid fermentation process using near-infrared spectroscopy. J Near beared. Spectrosc 10(1) 53-61, 2002. 

Gotor, A. A., E. Farkas, M. Berger et al. 2007. Determination of tocopherols and phytosterols in sunflower seeds by near-infrared spectroscopy. Eur. f. Lipid Sci. Technol. 

Infrared Spectroscopy. The GO RE-TEX substrate was chosen for its complete fluorocarbon composition. As it contains no hydrocarbon, we are able to investigate the IR spectra of the polymerized lipid coating, free from substrate band interference. The GORE-TEX is opaque near 1200 cm l due to absorptions of the CF2 and CF3 groups. 

Wilkes et al (22.23) coupled calorimetric, dynamic-mechanical and x-ray diffraction techniques to demonstrate crystallization of the lipids was completely reversible in neonatal rat stratum corneum, and only partially reversible in human stratum corneum. Melting regions near 40°C and from 70 to 90°C corresponded to the thermal transitions noted in the calorimetric studies for both species. The crystalline nature of the lipids did not appear to be dependent on the presence of water. X-ray diffraction and infrared spectroscopy studies (23.28-34) have also shown a to p conformational changes occurred in keratin and stratum corneum protein components with hydration or exposure to increased temperatures. Oertel (28) has reported pretreatment with dimethylsulfox-ide, hexylmethylsulfoxide and decylmethylsulfoxide resulted in the formation of p-sheet protein conformations in vitro in human... 

Bilia et al. reported the efficiency of two-dimensional homonuclear H- H correlated spectroscopy and two-dimensional reverse heteronuclear shift correlation spectroscopy in evaluating the composition of phloroglucinols, flavonols and naphthodianthrones in a dried extract of St John s wort. They successfully assigned carbon resonances for these three classes of compounds and also identified shikimic and chlorogenic acids, sucrose, lipid, polyphenols and traces of solvent (methanol) during the extraction process. This rapid technique is an alternative to HPLC, TLC or capillary GC for the analysis of St John s wort preparations. Another report utilized near-infrared reflectance spectroscopy (NIRS) for the... 

One interesting feature of infrared spectroscopy is that in the same spectrum the amide bands corresponding to the protein and the bands corresponding to the lipid can be studied. The core-associated lipids have been shown to undergo an order/ disorder transition near human body temperature, the actual transition temperature being determined by the lipid composition. Figure 10.6 shows the synchronous (left)... 

Applications Food. Immunoassays, Techniques Enzyme Immunoassays. Infrared Spectroscopy Near-Infrared. Lipids Fatty Acids. Liquid Chromatography Food Applications. Microscopy Applications Food. Nitrogen. Nitrosamines. pH. Phosphorus. Proteins Foods. Sampling Theory Practice. Sulfur. Water Determination. X-Ray Absorption and Diffraction X-Ray Absorption. 

T. Tajuddin, S. Watanab, K. Harada, S. Kawano. Application of near infrared transmittance spectroscopy to the estimation of protein and lipid contents in single seeds of soybean recombinant inbred lines for quantitative trait analysis. J Near Infrared... 

L. Velasco, A. Schierholt, H. C. Becker. Performance of near-infrared reflectance spectroscopy (NIRS) in routine analysis of Cl 8 unsaturated fatty acids in intact rapeseed. Fett/Lipid 100 44-48, 1998. 

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