بررسی اثر صمغ قدومه شهری بر ویژگی های امولسیون روغن ذرت در آب تولید شده با امواج فراصوت

نشریه پژوهشهای علوم و صنایع غذایی ایران

مقاله 3، دوره 9، شماره 1 - شماره پیاپی 23، فروردین 1392   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/ifstrj.v9i1.22969

نویسندگان

رسول کدخدایی¹؛ آرش کوچکی²؛ سید محمد علی رضوی³

¹موسسه پژوهشی علوم و صنایع غذایی

²دانشگاه فردوسی مشهد

³فردوسی مشهد

چکیده

در این تحقیق، اثر صمغ قدومه شهری (صفر، 2/0، 4/0 و 6/0 درصد وزنی) بر خصوصیات امولسیون روغن ذرت در آب تهیه شده با کنسانتره پروتئین آب پنیر (2 درصد وزنی) در 7pH: مورد بررسی قرار گرفت. به منظور بررسی ویژگی های امولسیون، قطر متوسط، سطح مخصوص ویژه، توزیع اندازه قطرات امولسیون، ویسکوزیته و رفتار جریان اندازه گیری شد. نتایج بررسی ها حاکی از این بود که با افزایش غلظت صمغ از صفر به 2/0 درصد، قطر متوسط ذرات (D3,2) به طور معنی داری کاهش یافت اما با افزایش غلظت تا 6/0 درصد تغییر معنی داری در اندازه ذرات امولسیون ها مشاهده نگردید. افزایش غلظت صمغ اثر معنی داری بر سطح مخصوص قطرات (m²/ml) و پهنای توزیع ذرات امولسیون ها نداشت. منحنی توزیع اندازه ذرات امولسیون ها نشانگر یکنواختی بیشتر قطرات فاز پراکنده در امولسیون حاوی غلظت بالای صمغ (6/0 درصد) بود. بررسی ویسکوزیته و رفتارجریان امولسیون ها نیز بیانگر این بود که ویسکوزیته امولسیون ها به طور قابل ملاحظه ای با افزایش غلظت صمغ افزایش یافت و امولسیون‏‏های حاوی صمغ در تمامی موارد رفتار رقیق شونده با برش را نشان دادند. نتیجه بررسی رفتار جریان امولسیون ها نشانگر تبعیت رفتار امولسیون ها از مدل هرشل باکلی بود

کلیدواژه‌ها

امواج فراصوت؛ صمغ قدومه شهری؛ پایداری امولسیون؛ رفتار جریان

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