1,720,983 research outputs found
Saturnia spa: biological activity and chemical characterization of thermal mud and biogleaTM.
No full textHigh performance liquid chromatography separation of the intermediates of pyridine coenzymes metabolism in Ricinus communis L. seedlings
No full textThe metabolism of pyridine coenzymes is not yet well clarified in vegetable cells. We propose a HPLC method to separate the compounds involved in the pyridine nucleotides cycle in less than 32 min. The method has been applied to Ricinus communis seedlings. On the basis of the results obtained, the well known "de novo" and "salvage" pathways, demonstrated in other biological tissues for NAD biosynthesis, are likely to occur in this vegetable system
Occurrence of pyridine compounds isolated by high performance liquid chromatography in Pinus pinea seeds
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Localization of the furanochromones khellin and visnagin in ripe fruits of Ammi visnaga (L.) Lam by UV microscopy
No full textRicerche chemio-cito-istologiche su Ammi visnaga (L.) Lam. delle Crete Senesi: primi risultati
No full textThe Mechanisms of Interaction Between Furanochromones and Dna - A Heteronuclear Overhauser Effect Study On the Khellin-thymidine Model System
No full textThe furanochromones khellin and visnagin have been characterised by 1H and 13C mono- and bidimensional NMR spectroscopies. Their strong affinity with DNA was experimentally confirmed by the complete disappearance of the furano-chromones' NMR signals upon additions of DNA. An intermolecular interaction between furanochromones and the thymidyl moieties of DNA, stabilized by the formation of a hydrogen bond between the thymidyl NH hydrogen and the C O group of khellin or visnagin, is here proposed. This is suggested by the strong donor-acceptor behavior of these two molecular moieties, as pointed out by a selective 1H-13C Overhauser effect study of the khellin-thymidine model system
Ammi visnaga (L.) Lam.: occurrence of khellin and visnagin in primary rib channels and endosperm, and emptiness of vittae, revealed by U.V. microscopy
No full textRapid separation and quantitative determination of khellin and visnagin in Ammi visnaga (L.) Lam. fruits by high-performance liquid chromatography
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