اثر پوشش خوراکی آلژینات و اسانس لعل کوهستان بر خصوصیات فیزیکوشیمیایی، میکروبی و حسی هویج رنده‌شده طی زمان ماندگاری

مجله پژوهشهای علوم و صنایع غذایی ایران

مقاله 8، دوره 19، شماره 5 - شماره پیاپی 83، آذر و دی 1402، صفحه 675-692   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/ifstrj.2022.78868.1207

نویسندگان

علی حسینی؛ نفیسه زمین‌دار^* ؛ یاسمن اسمعیلی

گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان)، اصفهان، ایران

چکیده

تلاش برای کاهش ضایعات غذایی اولویت صنعت غذا است. هدف از این پژوهش بررسی تأثیر پوشش آلژینات و اسانس لعل کوهستان بر ویژگی‌های فیزیکوشیمیایی و میکروبی هویج رنده‌شده در طول انبارداری بود. هویج‌های رنده‌شده (شاهد و پوشش‌دهی‌شده) پس از توزین تحت اتمسفر اصلاح‌شده در بسته‌های پلی‌پروپیلنی بسته‌بندی و به مدت 12 روز در دمای 4 درجۀ سانتی‌گراد نگهداری شد. به‌این‌منظور، آزمون‌های رنگ، اسید آسکوربیک و مواد جامد محلول کل، اسیدیته، pH، دی‌اکسیدکربن، کاهش وزن و کاروتنوئید (3 تکرار) و شمارش کلی و کپک مخمر (2 تکرار) در قالب طرح کاملاً تصادفی با آرایش فاکتوریل با 6 تیمار با آلژینات 5/1 درصد و غلظت‌های مختلف اسانس لعل کوهستان (150 و ppm250) و نمونه‌برداری در روزهای 1، 3، 6، 9 و 12 انجام شد. نتایج نشان داد میزان اسیدیته، کاروتنوئید و اسید آسکوربیک، مقدارL*  و ویژگی‌های حسی (رنگ، مقبولیت، عطروطعم) باتوجه‌به گذشت زمان کاهش و میزان pH، کاهش وزن، مقادیرa* ، b*، گاز دی‌اکسیدکربن، مواد جامد محلول کل و شمارش کلی افزایش یافت (05/0P<). همچنین با افزایش غلظت اسانس و آلژینات، میزان اسیدیته، کاروتنوئید، اسید اسکوربیک،L*  افزایش و مقادیر pH، کاهش وزن، مواد جامد،a* ، b*، کربن دی اکسید و شمارش کلی کاهش یافت (05/0P<). نتایج حاصل از شمارش کپک و مخمر نمونه‌ها هیچ‌گونه رشدی از شاخص­های مذکور تا روز 12 را نشان نداد. در مجموع اسانس لعل کوهستان و آلژینات بر بهبود ویژگی‌های هویج رنده‌شده تحت اتمسفر اصلاح‌شده در طول انبارداری مؤثر بود.

کلیدواژه‌ها

آلژینات؛ اتمسفر اصلاح شده؛ اسانس لعل کوهستان؛ پلی پروپیلن

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