کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6665136 | 464310 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Volatile compounds, sensory quality and ice morphology in falling-film and block freeze concentration of coffee extract
ترجمه فارسی عنوان
ترکیبات فرار، کیفیت حساسیت و مورفولوژی یخ در غلظت انبساط قهوه و انجماد بذر قهوه
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کلمات کلیدی
غلیظ قهوه، فرار کریو کنتراست، ارزیابی حسی، مورفولوژی یخ،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Coffee extract was freeze-concentrated through block and falling-film techniques. Solute retention and concentration efficiency were determined after one stage of these processes. Ice morphology was characterized through image analysis. Preservation of volatile compounds was determined through GC-MS. The effect of coffee extract on flavour was determined after freeze concentration through sensory evaluation. Solute occlusion was higher for falling-film than for block freeze-concentration, with an average distribution coefficient of 0.45 and 0.29, respectively. The ice crystal size was lower for the falling-film technique; this explains the higher solute occlusion. The dewatering capacity was higher for the falling-film technique, as this process is faster than block freeze-concentration. The most abundant volatile compounds of the coffee extracts were preserved after freeze concentration with both techniques. In the same way, no differences were found in most of the sensory attributes of the freeze-concentrated extract obtained using both techniques. Our results confirm the benefits of the block and falling-film freeze concentration techniques in preserving the quality of coffee extracts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Engineering - Volume 166, December 2015, Pages 64-71
Journal: Journal of Food Engineering - Volume 166, December 2015, Pages 64-71
نویسندگان
F.L. Moreno, M.X. Quintanilla-Carvajal, L.I. Sotelo, C. Osorio, M. Raventós, E. Hernández, Y. Ruiz,