افزایش زمان ماندگاری قارچ خوراکی دکمه ای(Agaricus bisporus)با پوشش های خوراکی بر پایه پلیمرهای طبیعی

نویسندگان
1 دانشگاه علوم و تحقیقات تهران
2 دانشگاه علوم و تحقیقات
3 دانشگاه تهران مرکز
چکیده
چکیده

در سال­ های اخیر پوشش ­های خوراکی به طور گسترده برای افزایش زمان ماندگاری میوه ­ها و سبزی ­ها به کار گرفته شده اند. در این پژوهش اثر شستشو با اسید سیتریک (1 درصد وزنی-حجمی) و پوشش دهی با غلظت ­های مختلف کربوکسی متیل سلولز (1، 1.5 و2 درصد وزنی- حجمی) در ترکیب با اسید آسکوربیک (2،1 و 3 درصد وزنی-حجمی) بر کیفیت پس از برداشت قارچ دکمه ­ای نگهداری شده در دمای C 4 به مدت 15 روز مورد مطالعه قرار گرفت. بعد از پوشش دهی افت وزن، میزان مواد جامد محلول، سفتی بافت، رنگ، کیفیت میکروبی و حسی قارچ ها در روزهای 1، 4، 8، 12 و 15 نگهداری مورد ارزیابی قرار گرفت. نتایج نشان داد در مقایسه با نمونه شاهد فاقد پوشش، پوشش دهی باعث کاهش افت وزن شده و تغییرات مواد جامد محلول و رنگ را به تاخیر می اندازد. پوشش ها اثر قابل توجهی بر حفظ سفتی بافت قارچ ­ها نداشتند. ارزیابی حسی نشان داد دوره ی ماندگاری قارچ ها از 8 روز به 15 روز افزایش یافت. شستشو با اسید سیتریک باعث کاهش شمار باکتری کل، کپک و مخمر شد. در بین پوشش ­های مختلف ترکیب کربوکسی متیل سلولز 2% و اسید آسکوربیک 3% موثرترین پوشش بود.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Extending the shelf life of edible button mushroom (Agaricus bisporus) by edible coatings on the basis of natural polymers

نویسندگان English

Ali Vaziri 1
Ali akbar Safekordi 2
azade shekarabi 3
Sadaf Shamlou 1
1 Science and research university
2 Science and research university
3 Central tehran branch university
چکیده English

Abstract

In recent years, edible coatings have been extensively used for extension shelf life of fruits and vegetables. In this research, the effect of washing with citric acid (1%w/v) followed by coating with different concentrations of carboxymethyl cellulose (CMC;1, 1.5 and 2% (w/v)) in combination with ascorbic acid (AA; 1, 2 and 3% (w/v)) on postharvest quality of button mushrooms when stored at 4 for up to 15 days was studied. After treatment, mushrooms weight loss, soluble solid content, firmness, color, microbial and sensory quality were evaluated at 1, 4, 8, 12 and 15 days of storage. The result indicated that coating reduced weight loss and delayed changes of soluble solid content and color compared to uncoated control mushroom. Coatings had not remarkable effect on firmness of mushrooms. Sensory evaluation showed that the shelf life of mushrooms increased from 8 to 15 days. Washing with citric acid reduced total bacteria, yeast and mold counts. Among different coatings the combination of CMC 2% and AA 3% was more effective.

کلیدواژه‌ها English

Key words: Button mushroom
Edible coating
Carboxymethyl cellulose
shelf life
natural polymers
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