مقایسه فعالیت آنتی اکسیدانی فنول های آزاد و باند شده نانوریزپوشانی شده عصاره پوست کیوی در افزایش پایداری اکسایشی روغن سویا

نویسندگان
نازیلا مبصری 1
رضا ااسماعیل زاده کناری2 2
راضیه رضوی 3
1 گروه مهندسی علوم و صنایع غذایی دانشگاه خزر، محمودآباد، ایران
2 دانشیار گروه مهندسی علوم و صنایع غذایی، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
3 گروه مهندسی علوم و صنایع غذایی، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
10.52547/fsct.18.118.349
چکیده
امروزه استفاده از آنتی اکسیدان های طبیعی در جهت افزایش عمر ماندگاری مواد غذایی افزایش یافته است. در این پژوهش عصاره پوست کیوی با کمک فراصوت نوع پروبی در دو شدت 50 و 80% و حمام فراصوت استخراج گردید که فنول آزاد در روش حمام فراصوت (88/265 میلی گرم بر گرم) و فنول باند شده استخراج شده به روش هیدرولیز اسیدی در دو شدت 50% (36/60 میلی گرم بر گرم) و 80% (83/63 میلی گرم بر گرم) دارای فعالیت آنتی اکسیدانی در روش مهار رادیکال آزاد DPPH بود. نانوریزپوشانی ترکیبات فنولی با استفاده از صمغ دانه شاهی انجام شد. هر سه نانوریزپوشینه اندازه نانومتری (3/172-5/146 نانومتر) و پتانسیل زتا منفی داشتند. جهت مقایسه فعالیت آنتی اکسیدانی ترکیبات فنولی آزاد و باند شده نانوریزپوشانی شده در غلظت 800 ppm و آنتی اکسیدان سنتزی TBHQ در غلظت 100 ppm به روغن سویای بدون آنتی اکسیدان اضافه شدند. نمونه ها به مدت 40 روز در دمای 60 درجه سانتیگراد نگهداری شدند و آزمون های اندازه گیری عدد پراکسید، اسید تیوباربیتوریک، آنیزیدین، پروفایل اسیدهای چرب روغن، میزان ته نشینی و رهایش ناوریزپوشینه ها در فواصل زمانی 8 روزه بر روی نمونه ها انجام شد. نتایج نشان داد با گذشت زمان نگهداری میزان رهایش و ت نشینی ترکیبات فنولی افزایش می یابد. اکسایش روغن با گذشت زمان نگهداری روندی افزایشی داشت. کمترین و بیشترین میزان اکسایش به ترتیب در نمونه حاوی TBHQ و نمونه شاهد مشاهده شد. استفاده از فنول باند شده در شدت 80% به دلیل عدم اختلاف معنی دار آماری (05/0<p) با نمونه حاوی آنتی اکسیدان سنتزی می­تواند به عنوان آنتی اکسیدان طبیعی جهت افزایش عمر ماندگاری روغن مورد استفاده قرار بگیرد.
کلیدواژه‌ها
پوست کیوی
روغن سویا
صمغ دانه شاهی
فنول

موضوعات

عنوان مقاله English

antioxidant activity of nano-encapsulated free and bounded phenol

نویسندگان English

NAZILA MOBASERI 1
reza esmaeilzadeh kenari 2
Razie Razavi 3
1 department of food science and technology Khazar University, Mahmood abad, Iran
2 Associate Professor, Department of Food Science & Technology, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
3 Department of Food Science & Technology, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
چکیده English

Nowadays, the use of natural antioxidants to increase the shelf life of foods has increased. In this study, kiwifruit peel extract was obtained by probe sonication at two intensities of 50 and 80% and ultrasonic bath. The free phenolic of bath ultrasound (265.88 mg/g), and bonded phenol in two intensities 50% (60.36 mg /g) and 80% (63.83 mg/g) had antioxidant activity in DPPH free radical scavenging method. Nano-encapsulated phenolic compound was performed using garden cress seed gum. All three nano-encapsulated phenols had nanometer size (146.5-172.3 nm) and negative zeta potential. In order to compare the antioxidant activity of free and bonded phenolic compounds nano-encapsulated phenols at 800 ppm and synthetic antioxidant TBHQ at 100 ppm were added to soybean oil without antioxidant. The samples were stored at 60 ° C for 40 days and tests were performed on the samples for 8 days intervals. The results showed that with increasing storage time, the amount of release and sedimentation of phenolic compounds increased. Oxidation of oil increased with storage time. The lowest and highest oxidation rates were observed in TBHQ and control samples, respectively. The use of bonded phenol at 80% intensity due to no statistically significant difference (p>0.05) with the sample containing synthetic antioxidant can be used as a natural antioxidant to extend the shelf life of the oil.

کلیدواژه‌ها English

: Kiwifruit peel
Soybean oil
Garden cress seed gum
phenol
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