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Raman Microprobe and Fourier Transform-Infrared Microsampling Studies of the Microstructure of Gallstones

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Several kinds of recently advanced microanalytical techniques — like electron probe x-ray microanalysis, laser Raman microprobe, and Fourier transform-infrared spectroscopy combined with a microsampling method — have been used for the study of the microstructure of gallstones. The organic and inorganic constituents of three kinds of gallstones are characterized on a microscopic scale. The microstructure of a cholesterol-bilirubin gallstone with a layered structure has been studied with particular emphasis. Small white particles contained in both a bilirubin gallstone and a cholesterol-bilirubin mixed gallstone have been found to consist of calcium salt of a fatty acid, probably calcium palmitate. The results obtained here will be very useful for understanding the mechanism of the gallstone-formation process.

Keywords: Electron probe x-ray microanalysis; Fourier transform-infrared spectroscopy; Gallstone; Microsampling; Raman microprobe

Document Type: Research Article


Affiliations: 1: Toray Research Center, Inc., 1-1, 1-Chome Sonoyama, Otsu, Shiga 520, Japan 2: Division of Biochemistry, The Jikei University School of Medicine, Nishi-Shinbashi, Minatoku, Tokyo 105, Japan 3: The First Department of Internal Medicine, The Jikei University School of Medicine, Nishi-Shinbashi, Minatoku, Tokyo 105, Japan

Publication date: March 1, 1987

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