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سینتیک تولید و خروج قندهای احیاء کننده و تغییر رنگ خلال سیب زمینی طی آنزیم بری در آب داغ | ||
مهندسی بیوسیستم ایران | ||
مقاله 13، دوره 47، شماره 1، اردیبهشت 1395، صفحه 119-125 اصل مقاله (389.82 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijbse.2016.58484 | ||
نویسندگان | ||
حامد بیکی* 1؛ ناصر همدمی2 | ||
1دانشگاه صنعتی اصفهان | ||
2دانشیار گروه علوم و صنایع غذایی دانشکده کشاورزی دانشگاه صنعتی اصفهان | ||
چکیده | ||
به منظور بررسی تأثیر دما و زمان فرایند آنزیم بری بر تولید و خروج همزمان قندهای احیاء کننده و سینتیک تغییرات رنگ طی آنزیم بری، خلالهای سیب زمینی پس از بسته بندی در عایق پلی اتیلنی و یا بدون بسته پلی اتیلنی در آب مقطر با دماهای 50، 60، 70، 80 و ºC90 به مدت 120 دقیقه جهت آنزیم بری غوطه ور شدند. نتایج آزمایشها نشان داد که افزایش دمای آنزیم بری، دیفوزیون قندهای احیاء کننده را سرعت بخشیده ولی تولید این قندها با افزایش دما کاهش مییابد و در دماهای 80 و ºC90 متوقف میشود. افزایش دما و زمان آنزیم بری همچنین سبب کاهش معنیدار (P<0.01) شاخصهای رنگ خلال گردید. نتایج بررسی مدلهای سینتیکی نشان داد که مدل درجه اول با اثر محدود کنندگی محصول بیشترین انطباق را با دادههای آزمایشگاهی تولید قندهای احیاء و شاخص قرمزی-سبزی داراست. درحالی که خروج قندهای احیاء کننده و تغییر شاخص های تیرگی-روشنی و زردی-آبی طی آنزیم بری از سینتیک درجه اول تبعیت می نمایند. | ||
کلیدواژهها | ||
قند احیاء کننده؛ آنزیم بری؛ شاخص های رنگ؛ مدلسازی سینتیکی | ||
عنوان مقاله [English] | ||
Kinetics of generation and extraction of reducing sugars and color changes during blanching of potato strips in hot water | ||
نویسندگان [English] | ||
hamed beyki1؛ Nasser hamdami2 | ||
1esfahan university of thechnology | ||
2Associate Professor of Isfahan University of Technology | ||
چکیده [English] | ||
In order to investigate the effect of temperature and time of blanching process on the generation and extraction of reducing sugars and kinetics of color changes during blanching, the potato strips packaged in the polyethylene (HDPE with 10 micron thickness) film or without polyethylene packaging, were immersed in distilled water at temperature range of 50, 60, 70, 80 and 90 ºC for 120 minutes. The results showed that increasing the temperature of blanching accelerated the diffusion of reducing sugars but the generation of these sugars is decreased with increasing temperature and stopped at 80 and 90 ºC. Increasing temperature and time of blanching were also reduced colorimetric parameters significantly (P<0.01). Kinetic modeling results showed that the first order kinetic with production rate limiting effect had the most conformity with experimental data of reducing sugars generation and redness-greenness parameter changes while the extraction of reducing sugars and darkness-lightness and yellowness-blueness parameters changes followed a first order kinetics. | ||
کلیدواژهها [English] | ||
reducing sugars, Blanching, Colorimeteric parameters, Kinetic modeling | ||
مراجع | ||
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