TY - JOUR A1 - Knobloch, Eberhard A1 - Kölbel, Bernd A1 - Sauerwein, Martin A1 - Sauerwein, Katrin A1 - Kölbel, Steffen A1 - Buckow, Cathleen A1 - Leitner, Ulrike A1 - Schwarz, Ingo A1 - Suckow, Christian A1 - Werner, Petra A1 - Pieper, Herbert ED - Ette, Ottmar ED - Knobloch, Eberhard T1 - HiN : Alexander von Humboldt im Netz = Herbert Pieper zum 65. Geburtstag N2 - Herbert Pieper zum 65. Geburtstag Inhalt: - Eberhard Knobloch: Herbert Pieper zum 65. Geburtstag. Ein Rückblick - Bernd Kölbel, Martin Sauerwein, Katrin Sauerwein, Steffen Kölbel, Cathleen Buckow: Das Fragment des englischen Tagebuches von Alexander von Humboldt - Ulrike Leitner: Humboldt, Cotta, Ritter. Eine Miszelle über die Arbeit an einer Edition - Ingo Schwarz: "da ich mich lebhaft für sein Schiksal im Neuen Continent interessire". A. v. Humboldt als Förderer Oscar M. Liebers - Christian Suckow: Humboldts spanische Option 1830. Eine Nachlese - Petra Werner: Bemerkungen zu Alexander von Humboldts Russland-Tagebuch - Herbert Pieper Alexander von Humboldts Wahl in die Akademie der Wissenschaften zu Berlin - Publikationen von Herbert Pieper [Bibliographie] T3 - HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies - IX.2008, 16 KW - Archimedes KW - BBAW KW - Mathematik KW - Zahlentheorie KW - 1769-1799 KW - England KW - Georg Foster KW - Reisetagebuch KW - Carl Ritter KW - Edition KW - Neudatierung KW - Francis Lieber KW - Geologie KW - Oscar M. Lieber KW - 1830 KW - Graf Ferdinand von Galen KW - Politik KW - Spanien KW - 1829 KW - Geographie KW - Meteorologie KW - Petra Werner KW - Russland KW - Russland-Tagebuch KW - Sibirien KW - Akademie der Wissenschaften Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-42246 SN - 1617-5239 SN - 2568-3543 VL - IX IS - 16 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Figueroa Campos, Gustavo Adolfo A1 - G. K. T. Kruizenga, Johannes A1 - Sagu Tchewonpi, Sorel A1 - Schwarz, Steffen A1 - Homann, Thomas A1 - Taubert, Andreas A1 - Rawel, Harshadrai Manilal T1 - Effect of the post-harvest processing on protein modification in green coffee beans by phenolic compounds JF - Foods : open access journal N2 - The protein fraction, important for coffee cup quality, is modified during post-harvest treatment prior to roasting. Proteins may interact with phenolic compounds, which constitute the major metabolites of coffee, where the processing affects these interactions. This allows the hypothesis that the proteins are denatured and modified via enzymatic and/or redox activation steps. The present study was initiated to encompass changes in the protein fraction. The investigations were limited to major storage protein of green coffee beans. Fourteen Coffea arabica samples from various processing methods and countries were used. Different extraction protocols were compared to maintain the status quo of the protein modification. The extracts contained about 4–8 µg of chlorogenic acid derivatives per mg of extracted protein. High-resolution chromatography with multiple reaction monitoring was used to detect lysine modifications in the coffee protein. Marker peptides were allocated for the storage protein of the coffee beans. Among these, the modified peptides K.FFLANGPQQGGK.E and R.LGGK.T of the α-chain and R.ITTVNSQK.I and K.VFDDEVK.Q of β-chain were detected. Results showed a significant increase (p < 0.05) of modified peptides from wet processed green beans as compared to the dry ones. The present study contributes to a better understanding of the influence of the different processing methods on protein quality and its role in the scope of coffee cup quality and aroma. View Full-Text KW - Arabica coffee KW - coffee processing KW - protein modification KW - bound phenolic compounds KW - peptide biomarkers KW - LC-MS/MS Y1 - 2022 U6 - https://doi.org/10.3390/foods11020159 SN - 2304-8158 VL - 11 PB - MDPI CY - Basel, Schweiz ET - 2 ER - TY - GEN A1 - Figueroa Campos, Gustavo A. A1 - G. K. T. Kruizenga, Johannes A1 - Sagu Tchewonpi, Sorel A1 - Schwarz, Steffen A1 - Homann, Thomas A1 - Taubert, Andreas A1 - Rawel, Harshadrai T1 - Effect of the Post-Harvest Processing on Protein Modification in Green Coffee Beans by Phenolic Compounds T2 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - The protein fraction, important for coffee cup quality, is modified during post-harvest treatment prior to roasting. Proteins may interact with phenolic compounds, which constitute the major metabolites of coffee, where the processing affects these interactions. This allows the hypothesis that the proteins are denatured and modified via enzymatic and/or redox activation steps. The present study was initiated to encompass changes in the protein fraction. The investigations were limited to major storage protein of green coffee beans. Fourteen Coffea arabica samples from various processing methods and countries were used. Different extraction protocols were compared to maintain the status quo of the protein modification. The extracts contained about 4–8 µg of chlorogenic acid derivatives per mg of extracted protein. High-resolution chromatography with multiple reaction monitoring was used to detect lysine modifications in the coffee protein. Marker peptides were allocated for the storage protein of the coffee beans. Among these, the modified peptides K.FFLANGPQQGGK.E and R.LGGK.T of the α-chain and R.ITTVNSQK.I and K.VFDDEVK.Q of β-chain were detected. Results showed a significant increase (p < 0.05) of modified peptides from wet processed green beans as compared to the dry ones. The present study contributes to a better understanding of the influence of the different processing methods on protein quality and its role in the scope of coffee cup quality and aroma. View Full-Text T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1256 KW - Arabica coffee KW - coffee processing KW - protein modification KW - bound phenolic compounds KW - peptide biomarkers KW - LC-MS/MS Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-557643 SN - 1866-8372 VL - 11 SP - 1 EP - 19 PB - Universitätsverlag Potsdam CY - Potsdam ET - 2 ER -