Dipartimento del Farmaco, Istituto Superiore di Sanità, Viale Regina Elena 299, I-00161 Rome, Italy.
Dipartimento di Scienze di Base e Applicate per l'Ingegneria SBAI, Sapienza Università di Roma, Via del Castro Laurenziano 7, I-00161 Rome, Italy.
Food Res Int. 2017 Sep;99(Pt 1):155-165. doi: 10.1016/j.foodres.2017.05.017. Epub 2017 May 23.
A deeper knowledge of the chemical composition of coffee silverskin (CS) is needed due to the growing interest in its use as a food additive or an ingredient of dietary supplements. Accordingly, the aim of this paper was to investigate the metabolic profile of aqueous extracts of two varieties of CS, Coffee arabica (CS-A), Coffee canephora var. robusta (CS-R) and of a blend of the two (CS-b) and to compare it to the profile of Coffee arabica green coffee (GC). Chlorogenic acids, caffeine, furokauranes, and atractyligenins, phytotoxins not previously detected in CS, were either identified or tentatively assigned. An unknown compound, presumably a carboxyatractyligenin glycoside was detected only in GC. Caffeine and chlorogenic acids were quantified while the content of furokauranes and atractyligens was estimated. GC and CS were also characterized in terms of total polyphenols and antioxidant capacity. Differences in the metabolites distribution, polyphenols and antioxidant capacity in GC and CS were detailed.
由于人们对咖啡银皮（CS）作为食品添加剂或膳食补充剂成分的兴趣日益浓厚，因此需要更深入地了解其化学成分。因此，本文旨在研究两种 CS（阿拉比卡咖啡 CS-A、罗布斯塔咖啡 CS-R 和两者的混合物 CS-b）的水提物的代谢谱，并将其与阿拉比卡咖啡生豆（GC）的代谢谱进行比较。先前在 CS 中未检测到的绿原酸、咖啡因、呋喃卡烷和苍术内酯等植物毒素，要么被鉴定出来，要么被暂定分配。在 GC 中仅检测到一种未知化合物，推测为羧基苍术内酯糖苷。咖啡因和绿原酸被定量，而呋喃卡烷和苍术内酯的含量则被估算。GC 和 CS 还根据总多酚和抗氧化能力进行了表征。详细描述了 GC 和 CS 中代谢物分布、多酚和抗氧化能力的差异。
