Author
Francisco Tomás-Lorente
Bio: Francisco Tomás-Lorente is an academic researcher from Spanish National Research Council. The author has contributed to research in topics: Sideritis & Kaempferol. The author has an hindex of 19, co-authored 38 publications receiving 1374 citations.
Topics: Sideritis, Kaempferol, Propolis, Helichrysum, Isorhamnetin
Papers
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TL;DR: The resins exuded by the flowers of Clusia minor and C. major contained the polyprenylated benzophenones found in the majority of the propolis studied, suggesting that this is the main source for propolis in tropical Venezuela.
162 citations
TL;DR: The analysis of the flavonoids present in orange nectar revealed that the flavanone hesperidin (hesperetin-7-rutinoside) was the major flavonoid detected and, therefore, this should be the main source of the hesperetin found in citrus honey.
Abstract: Seventeen flavonoid aglycones were identified in various experimental and commercial citrus honey samples by HPLC analysis The flavanone hesperetin was detected in all samples This flavanone was not detected in any of the honey samples, from diverse floral origin (including rosemary, lavender, sunflower, almond, sweet chestnut, white clover, Erisarum, Robinia, Rhododendron, Tilia, Prosopis, Eucalyptus and Calluna honeys) previously investigated The analysis of the flavonoids present in orange nectar revealed that the flavanone hesperidin (hesperetin-7-rutinoside) was the major flavonoid detected and, therefore, this should be the main source of the hesperetin found in citrus honey Hesperetin should be produced by hydrolysis of hesperidin by the bee enzymes present in honey These results suggest that hesperetin could be used as a marker for the botanical origin of citrus honey
161 citations
TL;DR: Results confirm that the co-occurrence of acidic phenolic hydroxyls and lipophilic residues is an important chemical feature for the expression of antifungal activity.
123 citations
TL;DR: L'analyse des flavonoides du miel presente un interet pour etudier l'origine geographique and botanique du produit d'eau a travers une colonne Amberlite XAD-2 qui retient les flavonoide et elimine les sucres.
Abstract: L'analyse des flavonoides du miel presente un interet pour etudier l'origine geographique et botanique du produit. Les divers echantillons de miel (50 g) ont ete melanges avec 5 parties d'eau (a pH 2 avec HCl) et filtres a travers une colonne Amberlite XAD-2 qui retient les flavonoides et elimine les sucres. Les flavonoides ont ete ensuite elues au methanol et l'eluat a ete concentre sous vide. La fraction sortante des flavonoides a ete analysee par chromatographie HPLC
91 citations
TL;DR: The preliminary results show that flavonoid analysis could be used as an adjunct to geographical origin studies of honey, and incorporate propolis flavonoids into honey from propolis, nectar or pollen.
Abstract: The flavonoids present in honey samples from different geographical areas (Europe, North America, Equatorial regions, South America, China and Australia) have been analysed by HPLC. These flavonoids are incorporated into honey from propolis, nectar or pollen. As a general rule, honey samples from the Northern Hemisphere (where poplars, the source of propolis, are native) show flavonoid profiles characterized by the presence of propolis flavonoids. In contrast, honey samples from most Equatorial regions and Australia are generally devoid of propolis-derived flavonoids, showing only flavonoids from other plant sources. However, several honey samples from Central and South America and from New Zealand do contain the flavonoids characteristic of propolis. This means that importedApis mellifera colonies may locate poplar trees, occasionally finding an imported specimen in gardens or agro-industrial exploitations, and incorporate propolis flavonoids into honey. These preliminary results show that flavonoid analysis could be used as an adjunct to geographical origin studies of honey.
75 citations
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TL;DR: Several high-quality investigations have examined the relationship between flavonoid structure and antibacterial activity and these are in close agreement, and future studies may allow the development of a pharmacologically acceptable antimicrobial agent or class of agents.
3,630 citations
TL;DR: Some of the recent advances in flavonoid research are reviewed and the role of anthocyanins and flavones in providing stable blue flower colours in the angiosperms is outlined.
3,465 citations
TL;DR: In this paper, several honey samples (27) from Burkina Faso were analyzed to determine their total phenolic, flavonoid and proline contents as well as their radical scavenging activity.
1,850 citations
TL;DR: This overview provides a cursory account of the source, extraction and analysis of phenolics in fruits, vegetables and cereals.
1,251 citations
TL;DR: The therapeutic efficacy of propolis in treating diseases caused by microorganisms is described and some recent concepts about propolis and its use in medicine are presented.
Abstract: Summary — The plant sources and chemical composition of propolis are reviewed. The chemical constituents that may be relevant to its biological and therapeutic activity are discussed. The cytotoxic activity and antimicrobial and pharmacological properties of propolis are presented. Propolis components, which cause allergy and are responsible for anticancer activity, eg, caffeic acid derivatives, are reported. The therapeutic efficacy of propolis in treating diseases caused by microorganisms is described. Some recent concepts about propolis and its use in medicine are presented.
1,231 citations