| Title: | Control of oxidation-reduction potential during Cheddar cheese ripening and its effect on the production of volatile flavour compounds |
| Author(s): | Caldeo V; Hannon JA; Hickey DK; Waldron D; Wilkinson MG; Beresford TP; McSweeney PL; |
| Address: | "School of Food and Nutritional Sciences,University College Cork,Cork,Ireland. Teagasc Food Research Centre,Moorepark,Fermoy,Cork,Ireland. Department of Life Sciences,University of Limerick,Castletroy,Limerick,Ireland" |
| DOI: | 10.1017/S002202991600056X |
| ISSN/ISBN: | 1469-7629 (Electronic) 0022-0299 (Linking) |
| Abstract: | "In cheese, a negative oxidation-reduction (redox) potential is required for the stability of aroma, especially that associated with volatile sulphur compounds. To control the redox potential during ripening, redox agents were added to the salted curd of Cheddar cheese before pressing. The control cheese contained only salt, while different oxidising or reducing agents were added with the NaCl to the experimental cheeses. KIO3 (at 0.05, 0.1 and 1%, w/w) was used as the oxidising agent while cysteine (at 2%, w/w) and Na2S2O4 (at 0.05 and 0.1%, w/w) were used as reducing agents. During ripening the redox potential of the cheeses made with the reducing agents did not differ significantly from the control cheese (E h approximately -120 mV) while the cheeses made with 0.1 and 0.05% KIO3 had a significantly higher and positive redox potential in the first month of ripening. Cheese made with 1% KIO3 had positive values of redox potential throughout ripening but no starter lactic acid bacteria survived in this cheese; however, numbers of starter organisms in all other cheeses were similar. Principal component analysis (PCA) of the volatile compounds clearly separated the cheeses made with the reducing agents from cheeses made with the oxidising agents at 2 month of ripening. Cheeses with reducing agents were characterized by the presence of sulphur compounds whereas cheeses made with KIO3 were characterized mainly by aldehydes. At 6 month of ripening, separation by PCA was less evident. These findings support the hypothesis that redox potential could be controlled during ripening and that this parameter has an influence on the development of cheese flavour" |
| Keywords: | Animals Cheese/analysis/microbiology Food Handling/*methods Hydrogen-Ion Concentration Oxidants Oxidation-Reduction Reducing Agents Sodium Chloride Taste Volatile Organic Compounds/*analysis/chemistry Cheddar cheese Oxidation-reduction potential redox age; |
| Notes: | "MedlineCaldeo, Veronica Hannon, John A Hickey, Dara-Kate Waldron, Dave Wilkinson, Martin G Beresford, Thomas P McSweeney, Paul L H eng England 2016/10/04 J Dairy Res. 2016 Nov; 83(4):479-486. doi: 10.1017/S002202991600056X. Epub 2016 Oct 3" |
