Biosynthesis of Salbutamol-4′-O-sulfate as Reference for Identification of Intake Routes and Enantiopure Salbutamol Administration by Achiral UHPLC-MS/MS

Autor: Annika Lisa Jendretzki, Lukas Corbinian Harps, Yanan Sun, Felix Bredendiek, Matthias Bureik, Ulrich Girreser, Xavier de la Torre, Francesco M. Botrè, Maria Kristina Parr

Publikováno v: Separations, Vol 10, Iss 8, p 427 (2023)

The aim of the study was a comprehensive and quantitative determination of salbutamol and its sulfoconjugated major metabolite in urine samples using achiral ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Therefor

Externí odkaz: https://doaj.org/article/3e287129e2304d90bd8944c043026627

Determination of Total Sennosides and Sennosides A, B, and A1 in Senna Leaflets, Pods, and Tablets by Two-Dimensional qNMR

Autor: Serhat Sezai Çiçek, Calisto Moreno Cardenas, Ulrich Girreser

Publikováno v: Molecules, Vol 27, Iss 21, p 7349 (2022)

In the present work, a two-dimensional qNMR method for the determination of sennosides was established. Using band-selective HSQC and the cross correlations of the characteristic 10–10’ bonds, we quantified the total amount of the value-determini

Externí odkaz: https://doaj.org/article/02b04a9c8ea24a2b902f665dcca256ce

Insights into polyamine metabolism: homospermidine is double-oxidized in two discrete steps by a single copper-containing amine oxidase in pyrrolizidine alkaloid biosynthesis

Autor: Mahmoud M Zakaria, Thomas Stegemann, Christian Sievert, Lars H Kruse, Elisabeth Kaltenegger, Ulrich Girreser, Serhat S Çiçek, Manfred Nimtz, Dietrich Ober

Publikováno v: Plant Cell

Polyamines are important metabolites in plant development and abiotic and biotic stress responses. Copper-containing amine oxidases (CuAOs) are involved in the regulation of polyamine levels in the cell. CuAOs oxidize primary amines to their respecti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d59a4ebec8de330643d14904bfd7421
https://doi.org/10.1093/plcell/koac068

Antimicrobial Prenylated Isoflavones from the Leaves of the Amazonian Medicinal Plant Vatairea guianensis Aubl

Autor: Serhat S. Çiçek, Mayra Galarza Pérez, Arlette Wenzel-Storjohann, Roberto M. Bezerra, Jorge F. O. Segovia, Ulrich Girreser, Isamu Kanzaki, Deniz Tasdemir

Publikováno v: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice)
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA

Vatairea guianenis Aubl. (Fabaceae) is an Amazonian medicinal plant species traditionally used for treating skin diseases. In an initial screening, a V. guianensis leaf extract and its subextracts showed antibacterial and antifungal activities. The E

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::593ac1c2162f91c15b475b1254d03dc8
https://doi.org/10.1021/acs.jnatprod.1c01035

Temperature dependent analysis of Octenidine (N,N´-(decane-1,10-diyldipyridin-1-yl-4-ylidene)dioctan-1-amine) dihydrochloride by NMR and NIR spectroscopy

Autor: Ulrich Girreser, Mainka David, Schwarz Jörg

Publikováno v: Arkivoc. 2020:287-298

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e3ee28e035b976a99d49d12cdd71cde2
https://doi.org/10.24820/ark.5550190.p011.189