کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1211696 | 1493778 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of caffeic acid enzymatic oxidation by-products by liquid chromatography coupled to electrospray ionization tandem mass spectrometry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The products of tyrosinase-catalyzed caffeic acid oxidation at pH 6.5 were investigated using high-performance liquid chromatography (HPLC) coupled to electrospray ionization mass spectrometry (ESI-MS). Aliquots of reaction mixtures were withdrawn at different times, varying from 0 to 24 h, and directly analysed by HPLC-ESI-MS and, in the case of 1 and 5 h, by HPLC-ESI-MS/MS to obtain structural information on caffeic acid derivatives. In particular, two different classes of caffeic acid dimers were identified: caffeicins-like structures and dimers originated by CC coupling between the benzene rings. Evidences for the presence of trimeric derivatives of caffeic acid were also obtained from MS data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1102, Issues 1–2, 13 January 2006, Pages 184–192
Journal: Journal of Chromatography A - Volume 1102, Issues 1–2, 13 January 2006, Pages 184–192
نویسندگان
S. Pati, I. Losito, F. Palmisano, P.G. Zambonin,