نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد ممقان

2 دانشگاه تبریز

چکیده

زغال اخته (Cornus mas L.) یکی از محصولات باغی ایران است که دارای مزیتهای زیادی از قبیل ارزش غذایی و دارویی، سودآوری و حتی صادراتی میباشد. هدف از این تحقیق بررسی تاثیر نگهداری و حمل و نقل در دمای محیط (روش رایج) بر ویژگیهای فیزیکیشیمیایی و ترکیبات زیست‌فعال زغال اخته میباشد. دو روش نگهداری زغال اخته عبارتند از نگهداری زغال اخته در دمای محیط و نگهداری به‌صورت خشک شده. در این بررسی، میوههای زغال اخته در داخل انکوباتور (25 درجه سلسیوس) به مدت 9 روزنگهداری شده و درفواصل زمانی معین (24 ساعته) پارامترهای شیمیایی (pH، اسیدیته، ماده خشک و خاکستر) و میزان افت ترکیبات زیست‌فعال (فنل کل، فلاونوئیدکل، آنتوسانین کل، ویتامین C و ظرفیت آنتی‌اکسیدانی) نمونه ارزیابی شد. نتایج نشان داد که پس از نه روز نگهداری مقدار آنتوسیانین کل از 379 به195 (میلی‌گرم در 100 گرم ماده خشک)، ویتامین C از 1385 به 354 (میلی‌گرم در 100 گرم ماده خشک) کاهش و مقدار فنل کل از 1237 به 2067 (میلی‌گرم در 100 گرم ماده خشک) و فلاونوئید از 491 به 943 (میکروگرم در 100 گرم ماده خشک) افزایش یافت. همچنین فعالیت آنتی‌اکسیدانی به مقدار33% کاهش یافت. با توجه به نتایج حاصل توصیه میشود زغال اخته پس از برداشت در دماهای پایین نگهداری شود و در مدت زمان کوتاهی مصرف شود تا ویژگیهای تغذیهای آن بیشتر حفظ شود.

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