کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2435379 1107071 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of a bacteriocin-producing Lactococcus lactis strain and high-pressure treatment on the esterase activity and free fatty acids in Hispánico cheese
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Effect of a bacteriocin-producing Lactococcus lactis strain and high-pressure treatment on the esterase activity and free fatty acids in Hispánico cheese
چکیده انگلیسی
The effect of milk inoculation with a bacteriocin-producing (BP) culture and of high-pressure (HP) treatment of 15-day-old Hispánico cheeses (400 MPa, 5 min, 10 °C), separately or combined, on the release of intracellular esterases and cheese lipolysis was investigated. Esterase activity and free fatty acids (FFAs) content increased during ripening of Hispánico cheese and palmitic, oleic and stearic acids being the most abundant FFAs. On day 15, the highest esterase activity was recorded for HP-treated BP cheese. The activity for HP-untreated BP cheese was the next highest. No difference in the activities was found between HP-treated and untreated cheeses made without BP culture. Total FFAs on day 15 were at a lower concentration in BP cheeses than in cheeses made without BP culture, probably due to the lower pH values of the former. The rate of total FFA accumulation from day 15 to day 50 was higher in BP cheeses (31.1-32.1% increase) than in cheeses made without BP culture (19.3-21.7% increase). The highest total FFA concentration on day 50 (612 mg kg−1) was found for HP-untreated cheese made without BP culture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Dairy Journal - Volume 17, Issue 12, December 2007, Pages 1415-1423
نویسندگان
, , , ,