Journal ArticleDOI
Chiral separation of diastereomeric flavanone-7-O-glycosides in citrus by capillary electrophoresis.
TLDR
Chiral separation of major flavanones in sweet orange, mandarine and grapefruit juices raised more difficulties than in lemon and sour orange juices as narirutin will not readily build complexes with most CDs.Abstract:
The 2S- and 2R-diastereomers of major flavanone-7-O-glycosides found in sweet orange (Citrus sinensis), mandarine (Citrus deliciosa), grapefruit (Citrus paradisi), lemon (Citrus limon), and sour or bitter orange juice (Citrus aurantium) were separated for the first time by chiral capillary electrophoresis (CE) employing various buffers with combined chiral selectors. Native cyclodextrins (CDs), neutral and charged CD derivatives were examined as chiral additives to the background electrolyte (BGE). Separation efficiency has not proved satisfactory with one single CD as chiral selector in the buffer, a full and simultaneos separation could often be achieved only by using combined buffer with two different CDs. Chiral separation of major flavanones in sweet orange, mandarine and grapefruit juices raised more difficulties than in lemon and sour orange juices as narirutin will not readily build complexes with most CDs. Diastereomeric flavanones of mature and immature grapefruits were compared and some differences were found: naringin showed different diastereomeric ratio and 2S-prunin appeared only in immature grapefruit. Marmalade was also examined by chiral CE. Its major flavanones corresponded to flavanone pattern of mixed sour and sweet oranges.read more
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Journal ArticleDOI
Natural bioactive compounds of Citrus limon for food and health
TL;DR: This review focuses on the phytochemistry and the analytical aspects of lemon compounds as well as on the importance for food industry and the relevance of Citrus limon for nutrition and health, bringing an overview of what is published on the bioactive compounds of this fruit.
Journal ArticleDOI
Enantioseparations by using capillary electrophoretic techniques. The story of 20 and a few more years.
TL;DR: The author's insight on the past, present and future of performing enantioseparations using capillary electrophoretic (CE) techniques is provided.
Journal ArticleDOI
Methods of analysis and separation of chiral flavonoids.
TL;DR: This review presents both the general principles that allow separation of chiral flavanones, and discusses both the advantages and disadvantages of the available chromatographic assay methods and procedures used to separately quantify flavanone enantiomers and epimers in biological matrices.
Journal ArticleDOI
Pharmacokinetics of selected chiral flavonoids: hesperetin, naringenin and eriodictyol in rats and their content in fruit juices
Jaime A. Yáñez,Connie M. Remsberg,Nicole D. Miranda,Karina R. Vega-Villa,Preston K. Andrews,Neal M. Davies +5 more
TL;DR: This study reports for the first time the stereospecific pharmacokinetics of three chiral flavonoids and their stereoselective content in fruit juices employing urine as a more reliable biological matrix.
Journal ArticleDOI
Smart and sustainable design of latent catalyst-containing benzoxazine-bio-resins and application studies
TL;DR: In this article, a straightforward synthetic approach to incorporate a hydrogen-bonding motif as part of a fully bio-based benzoxazine monomer (NAR-fa) is developed, leading to the first latent catalyst-containing thermosetting resin derived from natural renewable resources.
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