نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی زراعی و عمران روستایی، گروه مکانیک بیوسیستم، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان.

2 دانشکده علوم دامی و صنایع غذایی، گروه صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان.

چکیده

هدف از پژوهش حاضر تعیین بهترین ویژگی سطحی بافت (انتروپی، انرژی، همگنی، تباین، همبستگی و برتری) به‌منظور پیشگویی فاکتورهای کیفی آب مرکبات (pH، اسیدیته، مواد جامد محلول و اسکوربیک اسید) می‏باشد. بدین منظور آب مرکبات (نارنج، پرتقال، لیموترش و نارنگی) بلافاصله پس از فرآیند پاستوریزاسیون در دمای یخچال (4 درجه سانتی‌گراد) برای مدت 60 روز نگهداری گردید. در خلال انبارمانی بعداز اخذ تصویر از سطح آب مرکبات مقدار pH، ویتامین ث و مواد جامد محلول در روزهای 0، 20، 40 و60 اندازه گیری شدند. مطابق آنالیز تصویر تغییرات رنگ در طول فرآیند انبارمانی توسط سه کانال رنگی L*,a*, b* نشان داد که کانال رنگی L* تغییرات زوال در آب میوه ها را بهتر نشان می‏دهد. نتایج آنالیز آماری داده ها نشان داد که اسیدیته و اسکوربیک اسید در چهار نوع آب مرکبات بطور معنی داری (05/0 >P) طی مدت زمان نگهداری به ترتیب افزایش و کاهش یافتند. همچنین نتایج حاصل از آنالیز همبستگی نشان داد از بین ویژگی های استخراج شده از تصاویر، انرژی نسبت به دیگر ویژگی‏ها با ضریب همبستگی بالاتر توانایی پیشگویی اسیدیته، pH و آسکوبیک اسید را به خوبی دارد.

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