Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/7959
Título: Quantitative and qualitative determination of CLA produced by bifidobacterium and lactic acid bacteria by combining spectrophotometric and Ag+-HPLC techniques
Autor: Rodríguez-Alcalá, Luis M.
Braga, Teresa
Malcata, F. Xavier
Gomes, Ana
Fontecha, Javier
Palavras-chave: CLA production
Probiotic bacteria
UV spectrophotometry
Ag+-HPLC
Data: 2011
Editora: Elsevier
Citação: RODRÍGUESZ-ALCALÁ, Luís M....[et al] - Quantitative and qualitative determination of CLA produced by bifidobacterium and lactic acid bacteria by combining spectrophotometric and Ag+-HPLC techniques. Food Chemistry. ISSN 0308-8146. Vol. 125 (2011), p. 1373–1378
Resumo: Bifidobacterium and lactic acid bacteria (LAB), especially from the genera Lactobacillus and Lactococcus, are commonly used in the production of fermented dairy products due to their potential probiotic characteristics. Moreover, some strains of these microorganisms also have the ability to produce conjugated linoleic acid (CLA) from linoleic acid (LA), which has attracted much attention as a novel type of beneficial functional fermented milk. In the present work 22 probiotic bacteria were tested for the production of CLA, using a UV screening method and HPLC techniques. Five microorganisms, two strains of the genera Bifidobacterium, two Lactobacillus and one Lactococcus were selected for their ability to produce CLA after incubation in skim milk with free LA as a substrate. It was possible to quantify the production of CLA (in the range of 40–50 lg CLA/ml) and identify the CLA isomers produced as C18:2 cis 9, trans 11 (60–65%), C18:2 trans 10, cis 12 (30–32%), C18:2 trans 9, trans 11 and C18:2 trans 10, trans 12 (2–5%).
Peer review: yes
URI: http://hdl.handle.net/10400.14/7959
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0308814610012550
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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