Abstract:
The kinetics of colour and fluorescence development were studied in aqueous systems containing whole milk powder (WMP) and sucrose (S) at three WMP/S ratios (R=0.30, 0.68, 1.06) and three temperatures (T=105, 122.5, 140 °C). At each testing time, the colour parameters Kubelka-Munk index (K/S), lightness (L), optical density (OD), absorption coefficient (K), dominant wavelength (DWL) and fluorescence (F) were determined. F and 100/L were the most appropriate parameters to study non-enzymatic browning in concentrated milk systems. Adequate models (r2>0.96) developed to analyse the effect of T and R on the rate constants, showed that colour parameters and their kinetic coefficients were mainly affected by temperature. The influence of R was more relevant at high temperatures. The activation energies and Q10 values obtained for K/S, 100/L, F and OD were in the range 81-159 kJ mol-1 and 1.8-3.8, respectively. F and reflectance properties showed different dependence on temperature and R, reflecting that although related, they do not have the same origin and significance. © 2007.
Registro:
Documento: |
Artículo
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Título: | The kinetics of colour and fluorescence development in concentrated milk systems |
Autor: | Rozycki, S.D.; Pauletti, M.S.; Costa, S.C.; Piagentini, A.M.; Buera, M.P. |
Filiación: | Instituto de Tecnología de Alimentos, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Costanera Este y Rotonda, 3000 Santa Fe, Argentina CONICET, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, 1428 Buenos Aires, Argentina
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Palabras clave: | Colour; Concentrated milk; Fluorescence; Kinetic; Density (optical); Fluorescence; Parameter estimation; Rate constants; Thermal effects; Absorption coefficient; Concentrated milk; Dominant wavelength; Lightness; Dairy products |
Año: | 2007
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Volumen: | 17
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Número: | 8
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Página de inicio: | 907
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Página de fin: | 915
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DOI: |
http://dx.doi.org/10.1016/j.idairyj.2006.12.006 |
Título revista: | International Dairy Journal
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Título revista abreviado: | Int. Dairy J.
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ISSN: | 09586946
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CODEN: | IDAJE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09586946_v17_n8_p907_Rozycki |
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Citas:
---------- APA ----------
Rozycki, S.D., Pauletti, M.S., Costa, S.C., Piagentini, A.M. & Buera, M.P.
(2007)
. The kinetics of colour and fluorescence development in concentrated milk systems. International Dairy Journal, 17(8), 907-915.
http://dx.doi.org/10.1016/j.idairyj.2006.12.006---------- CHICAGO ----------
Rozycki, S.D., Pauletti, M.S., Costa, S.C., Piagentini, A.M., Buera, M.P.
"The kinetics of colour and fluorescence development in concentrated milk systems"
. International Dairy Journal 17, no. 8
(2007) : 907-915.
http://dx.doi.org/10.1016/j.idairyj.2006.12.006---------- MLA ----------
Rozycki, S.D., Pauletti, M.S., Costa, S.C., Piagentini, A.M., Buera, M.P.
"The kinetics of colour and fluorescence development in concentrated milk systems"
. International Dairy Journal, vol. 17, no. 8, 2007, pp. 907-915.
http://dx.doi.org/10.1016/j.idairyj.2006.12.006---------- VANCOUVER ----------
Rozycki, S.D., Pauletti, M.S., Costa, S.C., Piagentini, A.M., Buera, M.P. The kinetics of colour and fluorescence development in concentrated milk systems. Int. Dairy J. 2007;17(8):907-915.
http://dx.doi.org/10.1016/j.idairyj.2006.12.006