نوع مقاله : مقاله پژوهشی

نویسندگان

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

2 گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران.

3 دانشیار گروه نانو فناورى مواد غذایى، مؤسسه پژوهشی علوم و صنایع غذایى، مشهد، ایران

چکیده

در این تحقیق، اثر سطوح مختلف صمغ گزانتان و صمغ دانه ریحان به‌عنوان جایگزین‌های چربی در غلظت 45/0، 6/0 و 75/0 درصد بر خواص رئولوژیکی، پایداری امولسیون، پارامترهای رنگ و اندازه قطرات روغن سس مایونز کم‌چرب مورد بررسی قرار گرفت. خصوصیات جریان نمونه‌ها با استفاده از مدل‌های پاورلا، بینگهام، هرشل- بالکی و کاسون توصیف شد. نتایج نشان داد تمامی نمونه‌ها جزء سیالات غیرنیوتنی سودوپلاستیک می‌باشند. با افزایش غلظت صمغ (گزانتان، ریحان و مخلوط گزانتان- ریحان) از 45/0 تا 75/0درصد، شاخص رفتار جریان تمامی نمونه ها کاهش پیدا کرد، در حالی که ضریب قوام و ویسکوزیته ظاهری افزایش یافت. بیشترین ضریب قوام به نمونه محتوی 75/0 درصد صمغ گزانتان تعلق داشت، اما کمترین مقدار مربوط به نمونه تثبیت شده با 45/0 درصد صمغ دانه ریحان بود. تمام نمونه‌ها در طول نگهداری پایداری بالایی داشتند. امولسیون حاوی 45/0 درصد صمغ دانه ریحان پایین‌ترین اندازه قطرات روغن را داشت. سس مایونز تثبیت شده با 45/0 درصد صمغ گزانتان بیشترین پارامتر رنگی L را به خود اختصاص داد.

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