Changes in the Major Free Fatty Acids in Serra Cheese Throughout Ripening

نویسندگان

  • Angela C. Macedo
  • Xavier Malcata
  • A. C. Macedo
  • F. Xavier Malcata
چکیده

Changes in the concentrations of the free fatty acids (FFA) containing an even number of carbon atoms in Serra cheese were monitored using a two-way factorial design over a ripening period of 35 days throughout the cheesemaking season. Both time variables had statistically significant effects at the 5% level on the concentrations of FFA. The concentration of stearic acid increased signt$cantly to 351 mg kg-’ (fat basis) only during the first week of ripening. Concentrations of palmitic and oleic acids increased signtf?cantly during all stages of ripening and approximately doubled during the 3.5-day ripening period to reach levels of 425 and 453 mg kg-‘, respectively. Concentrations of butyric, caprylic, lauric and myristic acids were approximately constant during the first week and increased significantly thereafter up to 285, 17, 94 and 59 mg kg-‘, respectively, at 35 days. The concentrations of caprylic and myristic acids increased five-fold in 35 days, the concentration of butyric acid increased three-fold, and the concentration of lauric acid almost doubled during the same period. The concentrations of caproic, capric, linoleic and linolenic acids increased significantly to 48, 121, 188 and 126 mg kg-‘, respectively, only after 21 days of ripening. The concentration of linoleic acid doubled in that time period, while increases in the concentrations of caproic, capric and linolenic acids were much smaller. The concentrations of butyric, caproic and palmitic acids in cheeses manufactured in February were statistically lower than those in cheeses manufactured in May. The principal FFAs throughout ripening were, according to chain length and degree of saturation, butyric (short-chain), capric (medium-chain), palmitic and stearic acids (saturated long-chain), and oleic (unsaturated long-chain), Saturated and unsaturated long-chain FFA were present at the highest concentration at all stages of ripening. It is concluded that lipolysis in Serra cheese proceeds slowly to total FFA concentration of 2167 mg kg-’ (fat basis) by 35 days of ripening. Copyright

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Investigation on the Protein Degradation, Free Fatty Acid Content and Area Fraction of Poosti Cheese, Iranian Traditional Cheese Ripened in Skin

Background and Objectives: In this study, the proteolysis and lipolysis of Poosti cheese produced from raw sheep milk in mountainous eastern regions of Iran were investigated during 90 days of ripening. Materials and Methods: Sodium dodecyl sulfate polyacrylamide gel electrophoresis for proteolysis (SDS-PAGE) and gas chromatography (GC) for free fatty acids (FFAs) were applied to investigate th...

متن کامل

Amino acid and soluble nitrogen evolution throughout ripening of Serra da Estrela cheese

Four batches of Serra da Estrela cheese originating from as many dairy farms were sampled throughout the ripening period, and assayed for the evolution of free amino acid (FAA) content, total nitrogen content (TN), water-soluble nitrogen content (WSN), trichloroacetic acid-soluble nitrogen content (TCASN) and phosphotungstic acid-soluble nitrogen content (PTASN). The WSN content increased from ...

متن کامل

Evolution of free fatty acid profile during ripening in cheeses manufactured from bovine, ovine and caprine milks with extracts of Cynara cardunculus as coagulant

mChanges in the concentrations of free fatty acids (FFA) in bovine, ovine and caprine milk cheeses manufactured with a plant rennet (flowers of Cynara cardunculus) were studied throughout a 68-day ripening period. The long-chain saturated (C16 :0 and C18 :0) and unsaturated (C18 :1, C18:2, and C18 :3) FFA were the most abundant at all stages of ripening. The overall concentration of FFA in fres...

متن کامل

Role of adventitious microflora in proteolysis and lipolysis of Serra cheese: preliminary screening

Six different types of bacteria (five strains of lactic acid bacterium and one strain of coliform) isolated from 35-day-old Serra cheese were assayed for proteolytic and lipolytic activities on milk agar and tributyrin agar, respectively. Peptidase and lipase activities were further studied via analytical assaying of free amino acids by spectrophotometry and of free fatty acids by HPLC in in vi...

متن کامل

Characteristics of Nodooshan Goat Milk and Identification of Volatile Compounds in Traditional Nodooshan Goat Cheese during Ripening

Background and Objectives: Essential and minor components of the goat milk are unique ingredients in production of various food products. In this study, characteristics of Nodooshan goat milk were investigated and volatile compounds were identified in traditional Nodooshan goat cheese during ripening.  Materials & Methods: Physicochemical tests were carried out on raw milk, fresh cheese and ri...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003