تاثیر پوشش خوراکی ژل آلوئه‌ورا بر ترکیبات زیست‌فعال گوجه‌فرنگی گیلاسی حین نگهداری در دماهای مختلف

نوع مقاله : مقاله پژوهشی

نویسندگان

سمانه منجم

علی گنجلو

ماندانا بی مکر

گروه علوم و مهندسی صنایع غذایی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران.

https://doi.org/10.22067/ifstrj.v18i1.88987

چکیده

در این پژوهش با توجه به لزوم حفظ ویژگی‌های کیفی محصولات کشاورزی در مرحله پس از برداشت و افزایش زمان ماندگاری آنها تاثیر پوشش خوراکی ژل آلوئه‌ورا (صفر، 25، 50، 75 و 100 درصد حجمی/ حجمی) و دمای نگهداری (5، 12 و 25 درجه سلسیوس) بر تغییرات برخی از ترکیبات زیست‌فعال گوجه‌فرنگی‌‎های گیلاسی حین دوره نگهداری مورد بررسی قرار گرفت. بدین منظور گوجه‌فرنگی‌های گیلاسی با غلظت‌های مختلف از ژل آلوئه‌ورا به‌روش غوطه‌وری پوشش‌دار شدند و پس از بسته‌بندی به مدت 24 روز در دماهای مختلف نگهداری شدند. تجزیه و تحلیل آماری نشان داد غلظت ژل آلوئه‌ورا، دما و زمان نگهداری تاثیر معنی‌داری بر روند تغییرات ترکیبات زیست‌فعال داشتند (05/0p<) هرچند این تفاوت بین سطح 75 و 100 درصد غلظت ژل آلوئه‌ورا معنی‌داری نبود (05/0<p). بر اساس نتایج به‌دست آمده میزان آسکوربیک اسید با افزایش دما و زمان نگهداری کاهش یافت در حالی که اعمال پوشش سبب حفظ آسکوربیک اسید حداکثر به میزان 65/12 درصد گردید. روند تغییرات لیکوپن گوجه‌فرنگی‌های گیلاسی بر خلاف روند تغییرات آسکوربیک اسید بود. حین دوره نگهداری در دمای 5 درجه سلسیوس محتوای ترکیبات فنولی کل و فعالیت مهارکنندگی رادیکال‌های آزاد DPPH گوجه‌فرنگی‌های گیلاسی شاهد به ترتیب حداکثر به میزان 35/12 و 60/21 درصد افزایش یافت. اما بر خلاف دمای 5 درجه سلسیوس که این افزایش به‌طور پیوسته بود با افزایش دما به 12 و 25 درجه سلسیوس مقدار ترکیبات فنولی کل به‌ترتیب از روز 12 و 8 دوره نگهداری روندی کاهشی را آغاز نمود. این در حالی است که با افزایش غلظت ژل آلوئه‌ورا محتوای ترکیبات فنولی کل و فعالیت ضدرادیکالی به‌ترتیب حداکثر به میزان 24/12 و 30/24 درصد افزایش یافت. بر اساس یافته‌های این پژوهش برای حفظ ترکیبات زیست‌فعال گوجه‌فرنگی گیلاسی در مرحله پس از برداشت می‌توان از دمای 5 درجه سلسیوس و ژل آلوئه‌ورا با غلظت 75 درصد حجمی/ حجمی به‌عنوان یک پوشش خوراکی طبیعی استفاده نمود.

کلیدواژه‌ها

فعالیت ضدرادیکالی

ترکیبات فنولی کل

آسکوربیک اسید

گوجه‌فرنگی گیلاسی

آلوئه‌ورا

لیکوپن

موضوعات

• مهندسی مواد غذایی

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عنوان مقاله English

Effect of Aloe vera gel edible coating on bioactive compounds of cherry tomato during storage at different temperatures

نویسندگان English

Samaneh Monajem

Ali Ganjloo

Mandana Bimakr

Department of Food Science and Engineering, Faculty of Agriculture, University of Zanjan, Zanjan, Iran.

چکیده English

Conclusion: Based on the findings of the current study, the 75% v/v A. vera gel coating could be a promising natural coating agent for preservation of bioactive compounds of cherry tomatoes during the postharvest life especially at storage temperature of 5 ºC.

کلیدواژه‌ها English

Antiradical activity

Total phenolic compounds

Ascorbic acid

Cherry tomato

Aloe vera

Lycopene

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