3 research outputs found

    Phytochemical characterization of South Africa bush tea (Athrixia phylicoides DC.)

    Get PDF
    A methanolic extract of bush tea (Athrixia phylicoides, Asteraceae) was evaluated sensorially. A High Temperature Liquid Chromatography (HTLC)-coupled sensory-guided analysis was performed on bush tea extract to identify potential taste modulating compounds. One fraction showed bitter enhancing effects on caffeine. Fractionated using Fast Centrifugal Partition Chromatography (FCPC) and preparative HPLC followed by structure elucidation using NMR and LC-NMR led to the identification of three polymethoxylated flavones, quercetin-3'- O-glucoside (1), as well as a methoxylated derivative (2). In addition, two dicaffeoyl quinic acids and one coumaric acid ester (3) were isolated. Sensory evaluation of isolated compounds led to the identification of quercetin-3'-O-glucoside as bitterness enhancing principle.http://www.elsevier.com/locate/sajbhb201

    Strategies and performance of the CMS silicon tracker alignment during LHC Run 2

    No full text
    The strategies for and the performance of the CMS silicon tracking system alignment during the 2015–2018 data-taking period of the LHC are described. The alignment procedures during and after data taking are explained. Alignment scenarios are also derived for use in the simulation of the detector response. Systematic effects, related to intrinsic symmetries of the alignment task or to external constraints, are discussed and illustrated for different scenarios
    corecore