The aim of this study was to determine the content of free amino acids (FAA) and their ratio in ewe's milk cheese from the island Krk during its ripening. FAA content was determined by reversed phase HPLC (RP-HPLC) of cheese aqueous/ethanol extracts after FAA were transformed into their 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate derivatives. Their concentration increased during ripening, reaching the value of 5% in cheese dry matter. The dominant FAA were glutamic acid>leucine>valine>asparticacid>phenylalanine>serine>proline, and higher content of nonessential vs essential FAA was revealed. Krk cheese has, in relation to other cheeses, higher values for glutamic acid/leucine, glutamic acid/phenylalanine, glutamic acid/proline and smaller values for leucine/aspartic acid, valine/aspartic acid, phenylalanine/aspartic acid ratios, while other ratios are comparable to those of other hard ovine cheeses.
机构:
Univ Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, Portugal
Univ Acores, Dept Biol, Ctr Invest Recursos Nat, P-9500801 Ponta Delgada, PortugalUniv Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, Portugal
Kongo, J. Marcelino
Gomes, Ana M.
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Univ Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, PortugalUniv Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, Portugal
Gomes, Ana M.
Malcata, F. Xavier
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Univ Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, PortugalUniv Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, Portugal
Malcata, F. Xavier
McSweeney, P. L. H.
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Univ Coll, Dept Food & Nutr Sci, Cork, IrelandUniv Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, Portugal
机构:
Tomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech RepublicTomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech Republic
Mlcek, Jiri
Sustova, Kvetoslava
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Mendel Univ Brno, Fac Agron, Dept Food Technol, Brno, Czech RepublicTomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech Republic
Sustova, Kvetoslava
Rop, Otakar
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Coll Business & Hotel Management, Dept Gastron, Brno, Czech RepublicTomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech Republic
Rop, Otakar
Jurikova, Tunde
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Constantine Philosopher Univ, Fac Cent European Studies, Inst Nat & Informat Sci, Nitra, SlovakiaTomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech Republic
Jurikova, Tunde
Humpolicek, Petr
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Tomas Bata Univ Zlin, Ctr Polymer Syst, Ctr Polymer, Zlin 76272, Czech RepublicTomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech Republic
Humpolicek, Petr
Balla, Stefan
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Constantine Philosopher Univ, Fac Cent European Studies, Inst Nat & Informat Sci, Nitra, SlovakiaTomas Bata Univ Zlin, Dept Food Technol, Fac Technol, Nam TG Masaryka 275, Zlin 76272, Czech Republic