18 research outputs found

    F. Nicolas et E. Valceschini (eds.), Agro-alimentaire : une économie de la qualité. Versailles, INRA Editions, Paris, Economica, 1995, 433 p.

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    Hauteville François d'. F. Nicolas et E. Valceschini (eds.), Agro-alimentaire : une économie de la qualité. Versailles, INRA Editions, Paris, Economica, 1995, 433 p.. In: Cahiers d'Economie et sociologie rurales, N°34-35, 1er et 2e trimestres 1995. pp. 157-164

    Etude des déterminants de la consommation urbaine en viandes en Afrique de l'Ouest (l'exemple de Dakar)

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    MONTPELLIER-SupAgro La Gaillarde (341722306) / SudocSudocFranceF

    A novel example of a natural 2,5-dihydroxyflavanone from Unona lawii

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    3-Formyl-2,4,6-trihydroxy-5-methyldibenzoylmethane from Unona lawii has been shown to exist in a cyclic hemiketal form whereas 3-formyl-2,6-dihydroxy-4-methoxy-5-methyldibenzoylmethane from the same plant mainly exists in the enolic ring opened form, owing to chelation of both hydroxyl groups. The flavonoid pattern of Unona lawii suggests the biogenetic scheme : flavanone →2-hydroxyflavanone → flavone. 3-Formyl-2,4,6-trihydroxy-5-methyldibenzoylmethane has been synthesized by Baker-Venkataraman rearrangement of 3-formyl-2,4,6-tri-hydroxy-5-methylacetophenone benzoate
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