نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم و صنایع غذایی، واحد شاهرود، دانشگاه آزاد اسلامی، شاهرود، ایران.

2 گروه علوم آبزیان، پژوهشکده تالاب بین المللی هامون، پژوهشگاه زابل، زابل، ایران.

3 گروه فرآوری محصولات شیلاتی، دانشکده شیلات، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

چکیده

اسیدهای چرب امگا 3 در دستیابی به سلامت مطلوب و محافظت در برابر انواع بیماری ها نقش دارند. اگرچه ناپایداری و اکسیداسیون اسیدهای چرب ضروری آن، استفاده از آن را در محصولات غذایی با محدودیت مواجه کرده است. در میان راهبردهای مورد استفاده برای جلوگیری از این چالش ­ها، روش درون­ پوشانی موفق ترین روش بوده است. بنابراین، مطالعه حاضر با هدف بهبود پایداری روغن ماهی به کمک روش درون ­پوشانی و تولید محصولی فراسودمند انجام گرفت. در این تحقیق درون پوشانی روغن ماهی با نسبت 3:1 (روغن: پوشش) با پوشش­هایی از مالتودکسترین، کازئینات سدیم، کنستانتره آب پنیر و نشاسته اصلاح شده توسط خشک کن انجمادی انجام شد. ماست غنی شده با پودر روغن ماهی کپسوله شده تولید و خصوصیات فیزیکوشیمیایی و حسی محصول مورد ارزیابی قرار گرفت. نتایج نشان داد که اندازه ذرات، شاخص پراکندگی ذرات و راندمان درون­ پوشانی کپسول­های به ترتیب 0/85میکرومتر، 0/29 و 89/3 درصد می‌باشد. همچنین نتایج مشخص کردند میزان آب اندازی ماست غنی شده با میکروکپسول کمتر و ظرفیت نگهداری آب بیشتر از نمونه شاهد و غنی شده با روغن ماهی غیرکپسوله بود و افزایش مقادیر پراکسید در ماست غنی­ شده با روغن ماهی کپسوله ­شده روندی کندتر از ماست غنی شده با روغن غیرکپسوله داشت. در تمامی تیمارهای ماست، pH کاهش و اسیدیته افزایش یافت. ارزیابی حسی تیمارها مشخص نمود که طی نگهداری، از شاخص ­های کیفی تیمارهای ماست کاسته شد و تیمارهای ماست غنی شده با روغن میکروکپسوله و ماست شاهد از لحاظ پذیرش کلی اختلاف معنی داری را نشان ندادند.

کلیدواژه‌ها

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