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dc.contributor.authorPérez, J. F.
dc.contributor.authorBalcells Terés, Joaquim
dc.contributor.authorCebrián, J. A.
dc.contributor.authorMartin-Orúe, S. M.
dc.date.accessioned2018-10-17T07:43:36Z
dc.date.available2018-10-17T07:43:36Z
dc.date.issued1998
dc.identifier.issn0007-1145
dc.identifier.urihttp://hdl.handle.net/10459.1/64893
dc.description.abstractThe present study examined the endogenous urinary excretion of purine derivatives (PD; allantoin, uric acid and xanthine plus hypoxanthine) in fed animals. Four Rasa Aragonesa ewes fitted with simple cannulas in the rumen and proximal duodenum were used. Animals were given a lucerne (Medicago sativa) hay diet, as sole feed (A) or supplemented, respectively, with 220 (B), 400 (C), and 550 (D) g rolled barley grain/d following a 4 x 4 random factorial design. Duodenal flow of purine bases (PB) was determined by the dual-phase marker system. 15N was infused continuously into the rumen to label exogenous or microbial PB. Duodenal PB flow and urinary excretion of PD increased with digestible organic matter intake showing a constant recovery of duodenal PB. The isotope dilution of PD in urine samples confirmed the presence of an endogenous fraction, originating from tissues, that increased from 115.2 (SE 5.84) pmol/kg @ 75 for the basal diet to 304.2 (SE 7.6) pmol/kg @'75 at the highest level of duodenal PB.ca_ES
dc.description.sponsorshipThis work was supported by CICYT project AGF 95-0498.ca_ES
dc.language.isoengca_ES
dc.publisherCambridge University Pressca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1079/BJN19980040ca_ES
dc.relation.ispartofBritish Journal of Nutrition, 1998, vol. 79, p. 237-240ca_ES
dc.rights(c) Cambridge University Press, 1998ca_ES
dc.subjectPurinesca_ES
dc.subjectFeed intakeca_ES
dc.subjectSheepca_ES
dc.titleExcretion of endogenous and exogenous purine derivatives in sheep: effect of increased concentrate intakeca_ES
dc.typeinfo:eu-repo/semantics/articleca_ES
dc.identifier.idgrec021689
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1079/BJN19980040


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