Comparative biochemical evolution during ripening of bovine, ovine and caprine cheeses manufactured with extracts of flowers of Cynara cardunculus

• Type: Article in International Scientific Journal
• Date: 1997

Authors

Sousa, MJ (Author) Other; F. Xavier Malcata (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: ZEITSCHRIFT FUR LEBENSMITTEL-UNTERSUCHUNG UND-FORSCHUNG A-FOOD RESEARCH AND TECHNOLOGY

Vol. 205

Pages: 97-103

ISSN: 1431-4630

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 5 Citations

Other information

Authenticus ID: P-001-D1R

DOI: 10.1007/s002170050132

Abstract (EN): Changes in the main physicochemical and biochemical characteristics of bovine, ovine and caprine milk cheeses manufactured with. aqueous extracts of flowers of Cynara cardunculus were studied throughout ripening (0-68 days). At the end of ripening the pH in the centre was (mean +/- ISD) 5.05 +/- 0.07, 5.15 +/- 0.21 and 4.91 +/- 0.07 for bovine, ovine and caprine milk cheeses, respectively; whereas the pH at the top of the cheese was 5.21 +/- 0.09, 5.44 +/- 0.12 and 5.12 +/- 0.07, respectively; the moisture content values of bovine, ovine and caprine milk cheeses were 37.68 +/- 2.32, 40.23 +/- 4.34 and 45.73 +/- 1.44%, respectively; the NaCl content values were 4.00 +/- 0.43, 4.00 +/- 0.56 and 4.08 +/- 0.58 (%TS); the fat content values were 41.01 +/- 5.32, 63.60 +/- 7.80 and 45.14 +/- 9.14 (%TS); the protein content values were 28.96 +/- 1.84, 22.89 +/- 2.37 and 30.02 +/- 1.22 (%TS); the water-soluble nitrogen values were 32.91 +/- 1.76, 46.44 +/- 1.86 and 48.72 +/- 1.08 (%TN); the values of nitrogen soluble in trichloroacetic acid were 10.25 +/- 1.93, 10.41 +/- 2.91 and 7.25 +/- 0.84 (%TN); the values of nitrogen soluble in phosphotungstic acid were 1.50 +/- 0.18, 1.87 +/- 0.65 and 1.38 +/- 0.32 (%TN); finally, the free amino acid content values were 21.33 +/- 5.34, 17.51 +/- 5.08 and 23.93 +/- 4.80 mu M equivalents of leucine. Urea-polyacrylamide gel electrophoresis of water-insoluble fractions from cheeses indicated high degrees of proteolysis of alpha(s1)-casein in bovine cheeses and more extensive proteolysis of the alpha(s)-casein region in caprine than in ovine cheeses, but a moderate degree of proteolysis of beta-casein in all types of cheese; electrophoregrams of the water-soluble fraction displayed increasing numbers of bands throughout ripening, an observation that is consistent with the increase in the ratio of water-soluble nitrogen to total nitrogen.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7