تأثیر پوشش کیتوزان با درجات مختلف استیل‌زدایی در ماندگاری قارچ دکمه‌ای خوراکی (Agaricus bisporus)

مقالات آماده انتشار

نوع مقاله : مقاله پژوهشی فارسی

نویسندگان

• هدی قربانزاده
• جعفر محمدزاده میلانی
• علی معتمدزادگان

گروه علوم و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

https://doi.org/10.22067/ifstrj.2023.85321.1293

چکیده

یکی از مؤثرترین روش­ها برای افزایش طول مدت نگهداری قارچ خوراکی دکمه­ای، استفاده از پوشش­های خوراکی است. در این مطالعه، تأثیر کیتوزان به­عنوان یکی از پوشش­های خوراکی، با درصدهای استیل‌زدایی متفاوت (70 تا 100 درصد) با سه غلظت‌های مختلف مورد بررسی قرار گرفت. تأثیرات پوشش کیتوزانی بر روی افت وزنی، رنگ قارچ و اندیس قهوه­ای شدن، فعالیت آنزیمی، بافت و ترکیبات فنلی کل مطالعه شد. به این منظور قارچ­ها در محلول­های کیتوزان با غلظت­های 5/0، 1 و 2 درصد پوشش داده شدند و برای مدت 12 روز در دمای 4 درجه سانتی‌گراد نگهداری شدند. نتایج آزمون­ها حاکی از تأثیر مناسب پوشش­دهی کیتوزان بر نمونه­ های قارچ خوراکی بود، به ­طوری­ که میزان فنل کل در تیمار کیتوزان با درجه استیل‌زدایی70 درصد با غلظت یک درصد، در روز دوازدهم به ( 45/0 رسید، میزان آنزیم پراکسیداز در تیمار کیتوزان 70 درصد استیل‌زدایی شده با غلظت 5/0 درصد، (  8/0 بود و میزان سفتی نمونه در تیمار کیتوزان با درجه استیل‌زدایی شده 70 درصد با غلظت 2 درصد، تنها به میزان 401 گرم کاهش پیدا کرد در صورتی ­که نمونه شاهد به میزان 5/3385 گرم، سفتی خود را از دست داد. در کنترل افت وزنی، تیمار 100 درصد استیل‌زدایی شده با غلظت 2 درصد بهترین نتیجه را نشان داد و تنها 11/1 درصد افت وزنی داشت. آنزیم پلی‌فنل اکسیداز در تیمار 90 درصد استیل‌زدایی شده با غلظت 2 درصد، در روز دوازدهم آزمایش به (  67/0 رسید. تیمار کیتوزان با درجه استیل‌زدایی 100 درصد و 90 درصد در آزمون حسی، نتیجه بهتری از ارزیاب­ ها دریافت کرد. تیمار کیتوزان با درجه استیل‌زدایی 90 درصد و غلظت 5/0 درصد، عملکرد بسیار مناسبی نسبت به اندیس قهوه ­ای شدن نشان داد، به‌طوری­ که در روز دوازدهم آزمایش، اندیس قهوه­ای شدن نمونه به میزان 47/85 رسید.

کلیدواژه‌ها

• پوشش
• قارچ دکمه‌ای
• کیتوزان
• ماندگاری

موضوعات

• فناوری مواد غذایی

©2023 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source.

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