Unser 10. Leibniz Plant Biochemistry Symposium am 7. und 8. Mai war ein großer Erfolg. Thematisch ging es in diesem Jahr um neue Methoden und Forschungsansätze der Naturstoffchemie. Die exzellenten Vorträge über Wirkstoffe…
Omanische Heilpflanze im Fokus der Phytochemie IPB-Wissenschaftler und Partner aus Dhofar haben jüngst die omanische Heilpflanze Terminalia dhofarica unter die phytochemische Lupe genommen. Die Pflanze ist reich an…
Geschmack ist vorhersagbar: Mit FlavorMiner. FlavorMiner heißt das Tool, das IPB-Chemiker und Partner aus Kolumbien jüngst entwickelt haben. Das Programm kann, basierend auf maschinellem Lernen (KI), anhand der…
Zayed, A.; Abdelwareth, A.; Mohamed, T. A.; Fahmy, H. A.; Porzel, A.; Wessjohann, L. A.; Farag, M. A.;Dissecting coffee seeds metabolome in context of genotype, roasting degree, and blending in the Middle East using NMR and GC/MS techniquesFood Chem.373131452(2022)DOI: 10.1016/j.foodchem.2021.131452
With a favored taste and various bioactivities, coffee has been consumed
as a daily beverage worldwide. The current study presented a
multi-faceted comparative metabolomics approach dissecting commercially
available coffee products in the Middle East region for quality
assessment and functional food purposes using NMR and GC/MS platforms.
NMR metabolites fingerprinting led to identification of 18 metabolites
and quantification (qNMR) of six prominent markers for standardization
purposes. An increase of β-ethanolamine (MEA) reported for the
first time, 5-(hydroxymethyl) furfural (5-HMF), concurrent with a
reduction in chlorogenic acid, kahweol, and sucrose levels post roasting
as revealed using multivariate data analyses (MVA). The diterpenes
kahweol and cafestol were identified in green and roasted Coffea arabica, while 16-O-methyl cafestol in roasted C. robusta.
Moreover, GC/MS identified a total of 143 metabolites belonging to 15
different chemical classes, with fructose found enriched in green C. robusta versus fatty acids abundance, i.e., palmitic and stearic acids in C. arabica confirming NMR results. These potential results aided to identify novel quality control attributes, i.e., ethanolamine, for coffee in the Middle East region and have yet to be confirmed in other coffee specimens.