Original article Cheese-making properties of ovine and caprine milks submitted to high pressures

Abstract- The possibility to improve the yield and rennetability of ovine and caprine milks by the application of high pressures (1QO-400 MPa) has been investigated. The application of pres-sures over 200 MPa induced denaturation of f3-lactoglobulin, enhancing protein and moisture reten-tion in the curd. The effect of pressure on the coagulation properties depended on the magnitude and duration of the process and on the milk species, but in general terms, pressurization did not improve the renneting properties of ewe and goats ' milk. However, treatments at 400 MPa, which provided the highest cheese yields, did not considerably lengthen the rennet coagulation times, and in the case of goal ' s milk, pressurization improved the consistency of the curd. There-fore, pressurization of ovine and caprine milks seems to be a promising way of improving their technological properties for cheese-making. © InralElsevier, Paris. high pressure / ewe milk / goat milk / cheese yield / coagulation Résumé- Comportement fromager des laits de brebis et de chèvre soumis à de hautes pressions. La possibilité d'accroître le rendement et l'aptitude à la coagulation par la présure des laits de brebis et de chèvre par application de hautes pressions (10G-400 MPa) a été étudiée. L'application de pressions supérieures à 200 MPa induit la dénaturation de la ~-Iactoglobuline