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

نوع مقاله : مقاله پژوهشی

نویسندگان

• رسول کدخدایی ¹
• آرش کوچکی ²
• سید محمد علی رضوی ³

¹ موسسه پژوهشی علوم و صنایع غذایی

² دانشگاه فردوسی مشهد

³ فردوسی مشهد

https://doi.org/10.22067/ifstrj.v9i1.22969

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

عنوان مقاله [English]

Effect of Qodumeh Shahri Seed Gum on Physical Properties of Corn-oil in Water Emulsion Prepared by High Intensity Ultrasound

نویسندگان [English]

• Rassoul Kadkhodaee ¹
• Arash Koocheki ²
• Seyed Mohammad Ali Razavi ³

¹ Research Institute of Food Science and Technology (RIFST)

² Ferdowsi University of Mashhad

³ Ferdowsi University of Mashhad

چکیده [English]

The effect of addition of Qodumeh shahri (Lepidium perfoliatum) seed gum on the emulsion properties were investigated in this study. L. perfoliatum seed gum with 0-0.6% (w/w) concentration was used together with 2% (w/w) WPC to emulsify 20% (w/w) corn oil. The emulsion was analyzed for emulsion stability, particle size, specific surface area, particle size distribution and rheological properties. The mean particle size of emulsion decreased by increase in Qodume shahri seed gum up to 0.2% (w/w). Further increase in gum concentration had no significant effect on mean particle size of emulsion. Moreover, increase in gum concentration had no significant effect on particle size distribution (span) and specific surface area (m²/ml) of the emulsions. The rheological data indicated that increase in gum concentration significantly affected the viscosity, consistency coefficient (k) and flow behavior index (n) of the emulsions. Viscosity and consistency coefficient increased by increasing gum concentration. However, the flow behavior index decreased by the increase in Qodume shahri gum concentration. The flow behaviors of emulsions containing gum were well predicted by Herschel–Bulkley model (R2 > 0.99). While, in absence of gum, emulsion Showed Newtonian behavior.

کلیدواژه‌ها [English]

• High intensity ultrasound
• Qodumeh shahri
• Emulsion stability
• Flow properties

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