Effects of milk-clotting enzymes on physical properties of Mozzarella cheese

Direct acid Mozzarella cheese was made in 6-L vats using calf chymosin, bovine pepsin, porcine pepsin, or Mucor miehei protease. Four cheeses were made with each enzyme. Stretch, melt, cook color (reflectance colorimeter), moisture, and pH were measured at 1, 7, 14, and 28 d. Correlation coefficient...

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Bibliographic Details
Published in:Journal of dairy science 1992-03, Vol.75 (3), p.669-675
Main Authors: Oberg, C.J. (Weber State University, Ogden, UT), Merrill, R.K, Brown, R.J, Richardson, G.H
Format: Article
Language:English
Subjects:
Biological and medical sciences
CASEINA
CASEINE
CHYMOSINE
COLOR
CONTENIDO DE HUMEDAD
COULEUR
CUAJO
FABRICACION DEL QUESO
Food industries
FROMAGE
Fundamental and applied biological sciences. Psychology
FUSION
MICROORGANISME
MICROORGANISMOS
Milk and cheese industries. Ice creams
Mucor miehei
PEPSINA
PEPSINE
PRESURE
PROPIEDADES REOLOGICAS
PROPRIETE RHEOLOGIQUE
QUESO
QUIMOSINA
RHIZOMUCOR
TECHNOLOGIE FROMAGERE
TENEUR EN EAU
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Summary:Direct acid Mozzarella cheese was made in 6-L vats using calf chymosin, bovine pepsin, porcine pepsin, or Mucor miehei protease. Four cheeses were made with each enzyme. Stretch, melt, cook color (reflectance colorimeter), moisture, and pH were measured at 1, 7, 14, and 28 d. Correlation coefficients among these parameters were calculated, and the effects of choice of enzyme and storage time at 4 degrees C on these parameters were evaluated by analysis of variance. Cook color was not affected by enzyme type and changed only slightly during storage. Melt was affected by choice of enzyme and increased significantly with time. During the 28-d ripening period, the melt of cheese made with calf chymosin increased the most. The smallest increase in melt was in cheese made with porcine pepsin. Stretch was significantly affected by enzyme and by storage time. Stretch decreased rapidly in all cheeses between d 1 and 7 and stabilized during the next 21 d. Cheese made with porcine pepsin had the greatest stretch, and cheese made with calf chymosin had the least stretch, between d 7 and 28. Melt increased, and stretch decreased, during storage of all cheeses. The type of milk-clotting enzyme used played a significant role in determining physical properties of direct acid Mozzarella cheese
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(92)77802-3