بررسی تاثیر پیش تیمار فراصوت بر چروکیدگی زغال اخته طی خشک کردن با هوای داغ

نویسندگان
رسول قربانی 1
محسن اسمعیلی 2
1 دانشجوی دکتری، گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه ارومیه
2 استاد، گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه ارومیه
10.52547/fsct.19.123.15
چکیده
در پژوهش حاضر، مدل­سازی چروکیدگی زغال اخته طی خشک کردن همرفتی به صورت لایه نازک و تاثیر پیش­تیمار فراصوت، دما و سرعت هوای خشک­کن بر میزان چروکیدگی زغال اخته بررسی شد. پیش­تیمار فراصوت در دو سطح زمانی 10 و 30 دقیقه روی نمونه­های زغال اخته اعمال شد و سپس این نمونه­ها در دماهای 40، 50 و 60 درجه سانتیگراد و سرعت­های هوای 1، 5/1 و 2 متر بر ثانیه خشک شدند. در ادامه، داده­های چروکیدگی با سه مدل­ تجربی (مدل­های موجود در منابع) برازش شدند. نتایج نشان داد که با کاهش محتوای رطوبت در طول خشک­شدن، مقدار ضخامت نمونه­ها از0138/0 متر در ابتدا به 0078/0 متر در انتهای فرآیند خشک­کردن کاهش می­یابد. استفاده از پیش­تیمار فراصوت باعث کاهش معنی­دار (P<0.05) میزان ضخامت شد. علاوه بر این، یکی از مدل­های ارزیابی شده به­عنوان مناسب­ترین مدل پیش­بینی کننده تغییرات ضخامت زغال اخته (99/0=R2) تحت شرایط مورد آزمایش انتخاب شد. با انجام آنالیز رگرسیون غیرخطی، رابطه بین ضرایب مدل انتخاب شده با متغیرهای به­کار رفته در این تحقیق به­دست آمد.
کلیدواژه‌ها
خشک‌کردن
زغال اخته
اولتراسوند
چروکیدگی
مدل‌سازی

موضوعات

عنوان مقاله English

Investigation of the effect of ultrasound pretreatment on shrinkage of cornelian cherry during hot air drying

نویسندگان English

Rasoul Ghorbani 1
Mohsen Esmaiili 2
1 PhD Student, Department of Food Science and Technology, Faculty of Agriculture, University of Urmia
2 Professor, Department of Food Science and Technology, Faculty of Agriculture, University of Urmia
چکیده English

In this study, the effect of ultrasound pretreatment, air velocity and temperature on cornelian cherry shrinkage during hot air drying process were investigated. Ultrasound pretreatment at two time levels (10 and 30 minutes) was applied and then the samples were dried at 40, 50 and 60°C and 1, 1.5 and 2 m/s air velocity. Afterwards, shrinkage data were fitted to three experimental models. The results showed that with decreasing moisture content during drying, the thickness of the samples reduced from 0.0138 to 0.0078 m. The application of ultrasound pretreatment led to a significant (P<0.05) decrease in thickness. Moreover, one of the models was selected as the best suitable model in predicting thickness changes of cornelian cherry (R2=0.99) under the experimental conditions. Through multiple regression analysis, the relations between the coefficients of the models with the variables used were obtained.

کلیدواژه‌ها English

Drying
Cornelian cherry
Ultrasound
Shrinkage
Modeling
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