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Use of small ruminants’ milk supplemented with available nitrogen as growth media for Bifidobacterium lactis and Lactobacillus acidophilus

1998Journal article Restricted access
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dc.contributor.authorGomes, Ana M. P.
dc.contributor.authorMalcata, F. X.
dc.date.accessioned2011-10-14T15:02:00Z
dc.date.available2011-10-14T15:02:00Z
dc.date.issued1998
dc.description.abstractGrowth of, and acid production by Bifidobacterium lactis and Lactobacillus acidophilus using ovine and caprine milk as media were evaluated for their potential use in cheese-making. A protein hydrolysate (MHP, obtained from incubation of bovine milk with protease) or a mixture of free amino acids (FAA, similar to the amino acid fraction of MHP) was added as a nitrogen enrichment source. Bifidobacterium lactis and Lact. acidophilus were inoculated at 50 ml l−1 and incubated at 37 °C with growth supplements added at ratios in the range 25–50 ml l−1. The maximum viable counts of Bif. lactis were lower in plain ovine and caprine milk than in nitrogen-enriched milk, and MHP was a better growth promoter than FAA. A similar trend was observed with the acidity values developed, and attempts to correlate growth with acidity were successfully performed. The highest uptake rates of amino acids in ovine milk were observed for lysine, isoleucine, leucine and proline, but only isoleucine was taken up at a similar rate in caprine milk. Final bacterial viable counts of Lact. acidophilus in the plain and enriched forms of ovine milk did not differ greatly from each other, although FAA was statistically a better growth promoter than MHP. Unlike results in ovine milk, cultures of Lact. acidophilus in caprine milk exhibited drops of 1–1·5 log cycles in viable cell counts by 24 h of fermentation, irrespective of the nature of the nitrogen source. Parallel studies indicated that the excess of fatty acid residues in caprine milk could be responsible for the poor growth of Lact. acidophilus.por
dc.identifier.citationGOMES, A. M. P.; MALCATA, F. X. - Use of small ruminants’ milk supplemented with available nitrogen as growth media for Bifidobacterium lactis and Lactobacillus acidophilus. Journal of Applied Microbiology. ISSN 1364-5072. Vol. 85 n.º 5 (1998), p. 839-848por
dc.identifier.doi10.1046/j.1365-2672.1998.00594.x
dc.identifier.urihttp://hdl.handle.net/10400.14/6097
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWileypor
dc.titleUse of small ruminants’ milk supplemented with available nitrogen as growth media for Bifidobacterium lactis and Lactobacillus acidophiluspor
dc.typejournal article
dspace.entity.typePublication
person.familyNameGomes
person.familyNameMalcata
person.givenNameAna Maria
person.givenNameFrancisco
person.identifier162628
person.identifier.ciencia-idAA12-BFC1-B2E3
person.identifier.ciencia-id1B13-38A5-35F5
person.identifier.orcid0000-0001-7883-2446
person.identifier.orcid0000-0003-3073-1659
person.identifier.ridB-9944-2013
person.identifier.scopus-author-id57190668768
person.identifier.scopus-author-id7102542478
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationc18c2fb1-f3dc-4274-a646-23d456432798
relation.isAuthorOfPublicationa06c00da-0e2f-4434-8ede-4d7b22c0dfe9
relation.isAuthorOfPublication.latestForDiscoveryc18c2fb1-f3dc-4274-a646-23d456432798

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