بررسی اثر اُزن بر ویژگی‌های فیزیکوشیمیایی، میکروبی و حسی پنیر فراپالایش آب‌نمکی طی دوره رسیدگی

نوع مقاله : مقاله پژوهشی فارسی

نویسندگان

• علی اکبر غلامحسین پور ¹
• علی کریمی داویجانی ¹
• مصطفی کرمی ²

¹ گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه جهرم، جهرم، ایران

² گروه علوم و صنایع غذایى، دانشکده علوم و صنایع غذایى، دانشگاه بوعلى سینا، همدان، ایران

10.22067/ifstrj.2023.81663.1244

چکیده

اُزن یک فرایند غیرحرارتی است که می‌تواند باعث بهبود کیفیت و ارتقای ایمنی مواد غذایی شده و دوره نگهداری آنها را افزایش دهد. در این پژوهش، از گاز اُزن در غلظت‌های 2 و 5 ppm، در تولید پنیر فراپالایش آب‌نمکی استفاده گردید و پس از آن نمونه‌ها طی دوره رسیدگی 105 روزه مورد آزمایش‌های میکروبی، فیزیکوشیمیایی و حسی قرار گرفتند. اُزن‌زنی کنسانتره همزمان با تلقیح آغازگر (OA)، اُزن‌زنی کنسانتره قبل از تلقیح آغازگر (OB)، اُزن‌زنی کنسانتره (قبل از تلقیح) و آب‌نمک (OC)، اُزن‌زنی آب‌نمک (OD) و نمونه شاهد (C) تیمارهای مورد استفاده بودند. طبق نتایج، مقادیر مواد جامد، خاکستر، نمک، عدد اسیدی و آب‌اندازی پنیرها با گذشت زمان رسیدگی به‌طور معنی‌داری (05/0≥p) افزایش پیدا کرد، درحالی‌که مقادیر پروتئین و چربی نمونه‌ها به‌طور معنی‌داری (05/0≥p) کاهش یافت. pH نمونه‌ها نیز از روز صفر تا 35 کاهش و پس از آن در اکثر نمونه‌ها تا انتهای دوره رسیدگی افزایش پیدا کرد. شمارش کلی میکروبی نمونه‌ها نیز ابتدا تا روز 70 افزایش یافت، اما در ادامه تا انتهای دوره رسیدگی کاهش پیدا کرد. طی رسیدگی، شمارش کلی پنیرهای تیمار شده با دوز ppm 5 اُزن، کمتر از نمونه‌های تیمار شده با دوز ppm 2 اُزن بود. پنیرهای تیمار شده با دوز ppm 5 اُزن نیز عدد اسیدی بیشتری از نمونه‌های تیمار شده با دوز ppm 2 اُزن داشتند. با افزایش زمان رسیدگی، عدد اسیدی نمونه‌های OD5 و OB5 به‌طور معنی‌داری (05/0≥p) بیشتر از سایر نمونه‌ها بود. آب‌اندازی نمونه‌های OA5 و OB5 از روز 70 به بعد به‌طور معنی‌داری (05/0≥p) از دیگر نمونه‌ها بالاتر بود. در بیشتر تیمارها، امتیاز حسی پنیرهای انتهای دوره رسیدگی در مقایسه با پنیرهای ابتدای دوره به‌طور معنی‌داری (05/0≥p) بالاتر بود و هرچند تیمار اُزن توانست برخی از ویژگی‌های حسی پنیرها را ارتقا دهد، اما در کل این افزایش نسبت به نمونه شاهد، خصوصاً در انتهای دوره رسیدگی، معنی‌دار نبود.

کلیدواژه‌ها

• اُزن‌زنی
• پنیر آب‌نمکی
• دوره نگهداری
• ویژگی‌های فیزیکوشیمیایی

موضوعات

• فناوری مواد غذایی

©2023 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source.

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