English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The flavonoids present in sugarcane (Saccharum officinarum) extracts were analyzed by liquid chromatography - mass spectrometry (LC-MS), and a study of the fragmentation patterns of selected flavonoids was conducted using orthogonal acceleration time-of-flight electrospray ionization mass spectrometry (ESI-oa-ToF MS). Seven C- and O-glycosylflavones were identified in the extracts, namely, schaftoside, isoschaftoside, luteolin-8-C-(rhamnosylglucoside), vitexin, orientin, tricin-7-O-neohesperidoside and tricin-7-O-glucoside. Of these, five were identified in the absence of direct comparison with their respective standards. The described method also permitted the differentiation of the 6-C and 8-C isomeric flavones, schaftoside and isoschaftoside. The combination of fragmentation data and exact mass measurement showed to be complimentary to the HPLC-UV-MS techniques previously utilized for isomers discrimination in sugarcane studies.Os flavonóides presentes nos extratos de cana-de-açúcar (Saccharum officinarum) foram analisados por cromatografia líquida acoplada à espectrometria de massas (LC-MS), e o estudo da rota de fragmentação dos flavonóides selecionados foi realizado utilizando a espectrometria de massas com aceleração ortogonal por tempo de vôo e ionização eletrospray (ESI-oa-ToF MS). Sete flavonas C- e O-glicosiladas foram identificadas nos extratos: schaftosídeo, isoschaftosídeo, luteolina-8-C-(ramnosilglicosídeo), vitexina, orientina, tricina-7-O-neohesperidosídeo e tricina-7-O-glicosídeo. Destas, cinco foram identificadas sem comparação direta com seus respectivos padrões. O método descrito também permitiu a diferenciação das 6-C e 8-C flavonas isoméricas, schaftosídeo e isoschaftosídeo. A combinação dos dados de fragmentação e a medida de massa exata mostraram ser complementares às técnicas de HPLC-UV-MS previamente utilizadas para discriminação de isômeros nos estudos da cana-de-açúcar.FAPESPCNP

Study of C- and O-glycosylflavones in sugarcane extracts using liquid chromatography: exact mass measurement mass spectrometry