تهیه نانوحامل‌های بیوپلیمری کیتوزان/صمغ عربی با روش کوآسرواسیون؛ ارزیابی خصوصیات فیزیکی، ریزساختاری/ملکولی و بررسی اثر آن‌ها بر بهبود پایداری اکسایشی روغن ماهی کیلکا (Clupeonella cultiventris)

نویسنده
دانشجوی دکتری موسسه تحقیقات علوم شیلاتی کشور
چکیده
مطالعه حاضر با هدف تولید نانوحامل‌های ترکیبی از کیتوزان و صمغ عربی حاوی روغن ماهی کیلکا و ارزیابی خصوصیات فیزیکی و ریزساختاری/ملکولی؛ و همچنین بررسی پایداری اکسایشی آنها انجام گرفت. بدین منظور نانوحامل‌های روغن ماهی (به شکل خالص و نانوامولسیون شده) با نسبت 4:1 هسته: دیواره؛ و با استفاده از نسبت‌های مختلف کیتوزان/صمغ عربی (1:1؛ 1:2؛ 2:1) و مالتودکسترین (MD) به عنوان پرکننده به روش کواسرواسیون تولید شدند. ویژگی‌های مختلف نانوحامل‌های تولید‌شده شامل اندازه ذرات امولسیون؛ کارایی ریزپوشانی، رهایش، XRD و FTIR نانوحامل‌های تولیدی و همچنین شاخص‌های پایداری اکسیداتیو PV و TBA مورد ارزیابی قرار گرفتند. طبق نتایج، کمترین مقدار اندازه ذرات و بیشترین میزان کارایی ریزپوشانی در تیمار ترکیبی کیتوزان و صمغ عربی با نسبت 1: 1 مشاهده گردید. تفاوت معنی‌داری از نظر مقدار رهایش بین تیمارها مشاهد نشد و در همه تیمارها الگوی رهایش روند مشابهی نشان داد. نتایج حاصل از FTIR و XRD حضور و ریزپوشانی مطلوب روغن ماهی در نانوحامل‌های بیوپلیمری را تایید کرد. نتایج حاصل از نگهداری پودر‌ها طی 28 روز در دمای 35 درجه؛ نشان‌دهنده افزایش معنی‌دار مقادیر شاخص-های PV و TBA بود؛ میزان PV و TBA در تیمار شاهد در روز 28 نگهداری به طور قابل توجهی بیشتر از روز صفر بود که در این رابطه مشاهدات نشان داد پایداری اکسایشی روغن ماهی کیلکا در نانوحامل‌های کیتوزان/صمغ عربی به طور قابل ملاحظه ای در مقایسه یا تیمار شاهد افزایش یافت.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Preparation of biopolymerical nanocarriers from chitosan/Arabic gum by complex coacervation; Evaluation of physicochemical, microstructural/molecular properties and its effect on oxidative stability of kilka (Clupeonella cultiventris) oil

نویسنده English

seyed ebrahim moradi
PhD student of Iranian Fisheries Science Research
چکیده English

The present study aimed to evaluate physical and microstructural/molecular properties of encapsulated fish oil, and their oxidative stability during storage. To this end, Nanoemulsion of Fish oil (in both pure and nanoemulsified form) was produced using complex coacervation method and various ratios of chitosan and gum arabic (CH1:GA1; CH1:GA2; CH2:GA1) as wall materials and maltodextrin (MD) as filer. Then, emulsion and microocapsulated powder properties including Particle size, encapsulation efficiency, release, XRD, FTIR, peroxide value and TBA index were evaluated. According to the results, the lowest amount of particle size and the highest encapsulation efficiency were observed in the treatment of CH1:GA1. There was no significant change in the release rate among different treatments and all of treatments showed similar release pattern. The results of FTIR and XRD confirmed the presence and favorable encapsulating of kilka oil within biopolymerical nanocarriers. Duration 28 days maintenance at 35ᵒC; peroxide value and TBA levels were significantly increased for all of treatments; In this regard, the oxidative stability was significantly increased in nanocarriers made from chitosan/gum arabic compared to control treatment.

کلیدواژه‌ها English

nanocarrier
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