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

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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