Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2825
Título: Changes in the pool of free fatty acids in ovine, bovine and caprine milk fats, effected by viable cells and cell-free extracts of lactococcus lactis and debaryomyces vanrijiae
Autor: Regado, Mafalda A.
Cristovão, Betina M.
Tavaria, Freni K.
Ferreira, João Paulo
Moutinho, Carla G.
Balcão, Victor M.
Malcata, F. Xavier
Palavras-chave: Lipolysis
Dairy food
Flavour generation
Data: 2007
Editora: Elsevier
Citação: "Food Chemistry". ISSN 0308-8146. 103: 4 (2007) 1112-1118
Resumo: Lipolysis catalysed by lipases, native or released by natural microflora in milk, plays a key role in development of aroma and flavour throughout cheese ripening. This research effort was aimed at a deeper understanding of the action of two wild strains used in traditional ewe’s milk cheesemaking in Portugal, viz. Lactococcus lactis and Debaryomyces vanrijiae. They were both tested as viable cells and cellfree extracts – using bovine, ovine and caprine milk fat emulsions as model substrates. Hydrolysis reactions were carried out at 30 and 37 C, in the case of L. lactis and D. vanrijiae, respectively; the contents of short- and medium-chain fatty acids were determined by high pressure liquid chromatography. Our experimental results showed general trends, viz. preferential depletion of medium chain fatty acids throughout the whole reaction time. However, distinct patterns were observed towards different substrates, depending on the source and form of the biocatalyst at stake.
URI: http://hdl.handle.net/10400.14/2825
Versão do Editor: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T6R-4MV1FCD-1&_user=2460358&_coverDate=12%2F31%2F2007&_alid=1493616394&_rdoc=1&_fmt=high&_orig=search&_origin=search&_zone=rslt_list_item&_cdi=5037&_sort=r&_st=13&_docanchor=&view=c&_ct=1&_acct=C000057417&_version=1&_urlVersion=0&_userid=2460358&md5=bc966538566bd1976f7f24f24ddc0bb9&searchtype=a
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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