کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
22343 43270 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Online estimation of assimilable nitrogen by electrical conductivity measurement during alcoholic fermentation in enological conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Online estimation of assimilable nitrogen by electrical conductivity measurement during alcoholic fermentation in enological conditions
چکیده انگلیسی

The monitoring of alcoholic fermentation under enological conditions is currently poor due to the lack of sensors for online measurements. Such monitoring is currently limited to the measurement of CO2 production or changes in density. In this study, we determined the potential value of measuring electrical conductivity. We showed that this measurement is related to the assimilation of nitrogen, which is typically the limiting nutrient, and directly correlated to ammoniacal nitrogen assimilation at any percentage of ammoniacal nitrogen in the medium. We also used electrical conductivity for the very precise monitoring of the kinetics of nitrogen assimilation after the addition of a pulse of diammonium hydrogen phosphate (DAP) during fermentation. The impact of initial conditions (e.g., must composition, grape variety, pH) remains unclear, but the robustness, precision and low price of the sensor used justify further studies of the potential value of measuring electrical conductivity on the pilot and industrial scales.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Bioscience and Bioengineering - Volume 103, Issue 3, March 2007, Pages 229–235
نویسندگان
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