ارزیابی خواص آنتی‌اکسیدانی سلنیوم ریزپوشانی‌شده در روغن سویای تصفیه‌شده عاری از آنتی‌اکسیدان

نویسندگان
ساناز عباسی 1
محمد گلی 2
1 گروه علوم و صنایع غذایی، دانشگاه ازاد اسلامی واحد اصفهان، اصفهان، ایران
2 گروه علوم و صنایع غذایی، دانشگاه ازاد اسلامی اصفهان، اصفهان، ایران
10.52547/fsct.17.108.165
چکیده
چکیده

تحقیقات بسیاری پیرامون جایگزین کردن آنتی‌اکسیدان‌های سنتزی با آثار تغذیه‌ای سوء صورت گرفته است. این تحقیق به بررسی اثر آنتی‌اکسیدانی سلنیت سدیم ریزپوشانی شده در به تأخیر‌اندازی اکسیداسیون روغن سویا پرداخت. ریزپوشانی 15000 پی­پی­ام سلنیت سدیم با صمغ عربی (25، 26، 27، 28، 29%)، صمغ فارسی (متناظر با صمغ عربی مصرفی بترتیب شامل 5، 4، 3، 2، 1%) و از نسبت حلال اتانول 96% به مخلوط صمغ و سلنیت سدیم (4، 6، 8، 10، 12) استفاده شد. فرمول بهینه­ اول (صمغ عربی29%، صمغ فارسی 1% و نسبت اتانول به مخلوط 12 به 1 با کارایی ریزپوشانی 94%، اندازه­ ذرات 9/64 میکرومتر) و فرمول بهینه­ دوم (صمغ عربی 27%، صمغ فارسی 3% و نسبت اتانول به مخلوط 10 به 1 با کارایی ریزپوشانی 4/84%، اندازه‌ ذرات 74 میکرومتر) انتخاب شد. نمونه‌های بهینه (6/180پی‌پی‌ام)، بوتیل هیدروکسی آنیزول (200پی‌پی‌ام)، سلنیت سدیم فاقد کپسول (6/8 پی‌پی‌ام معادل سلنیوم کپسول‌های بهینه) به روغن سویای فاقد آنتی‌اکسیدان اضافه شد و دما و زمان نگهداری روغن سویا در انکوباتور با کمک برنامه‌ شتابدهنده شلف لایف (55 درجه سانتی گراد و 0، 23، 44 روز) معادل با انبارداری (20 درجه سانتی گراد و 0، 180، 360 روز) تنظیم گردید و شاخص­های اکسیداسیون مقایسه شد. با افزایش درصد صمغ عربی و نسبت اتانول به مخلوط، کارایی افزایش و سایز ذرات کاهش یافت. سلنیوم کپسوله شده همانند بوتیل هیدروکسی آنیزول منجر به افزایش فعالیت آنتی‌اکسیدانی و کاهش شاخص‌های اکسیداسیون روغن سویا گردید. بررسی فعالیت آنتی‌اکسیدانی حداکثری در بازه‌ یکساله‌ نگهداری به شرح زیر بود. بهینه اول (رهایش تدریجی) > بهینه دوم = بوتیل هیدروکسی آنیزول > سلنیت­سدیم کپسول نشده (مصرف آنی) > شاهد (فاقد آنتی‌اکسیدان).
کلیدواژه‌ها
سلنیت‌سدیم
ریزپوشانی
روش تبخیر حلال
روش سطح پاسخ
شاخص‌های اکسایش

عنوان مقاله English

Evaluation of antioxidant properties of sodium-selenite microencapsulated in antioxidant-free soybean oil refined

نویسندگان English

Sanaz Abbasi 1
Mohammad Goli 2
1 Department of Food Science & Technology, Isfahan(Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
2 Department of Food Science & Technology, Isfahan(Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
چکیده English

Much research has been done approaching replacing synthetic antioxidants with adverse nutritional effects. In this study, the antioxidant effect of microencapsulated sodium selenite in delaying oxidation of soybean oil was investigated. Microencapsulation of sodium-selenite was carried out, comprising the following combination: Arabic gum (25, 26, 27, 28, and 29%) and a corresponding amount of Farsi gum (corresponding to Arabic gum, respectively 1, 2, 3, 4, and 5%) using the solvent (ethanol with purity 96% ) evaporation method. The ratio of ethanol to the mix solution [combination gum + sodium selenite] was (4, 6, 8, 10, and 12). Finally, optimal formula1 (EE 94%, particle-size 64.9µm, Arabic gum 29%, Farsi gum 1%, and the ratio of ethanol to the mix solution 12 ) and the optimal formula2 (EE 84.4%, particle-size 74µm, Arabic gum 27%, Farsi gum 3%, and the ratio of ethanol to the mix solution 10) were selected. Consequently, the two selected optimal formulas (180.6PPM), the BHA(200PPM), and the un-microencapsulated sodium-selenite (8.6PPM) were added to antioxidant-free soybean oil and then were placed at the 55℃ for (0, 23, 46 days) equal to 20℃ (0, 180, 360 days) by shelf-life accelerator program. The oxidation indices were compared with soybean oil that did not contain any anti-oxidant. EE increased and particle size decreased with increasing Arabic gum levels and the ethanol to mix solution ratio. Encapsulated selenium, such as BHA, increased antioxidant activity and decreased soybean-oil oxidation indices. The effective and propositional treatments are presented in the following order respectively: blank (antioxidant-free) < un-microencapsulated sodium-selenite < BHA = Opt2 < Opt1.

کلیدواژه‌ها English

Sodium selenite
Microencapsulation
Solvent Evaporation Method
response surface methodology
Oxidation indices
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