Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems
Retention of β-galactosidase activity was analyzed in whey model systems in relation to browning development and physical characteristics of the matrix (degree of matrix compression, crystallinity, glass transition). Amorphous systems were obtained by freeze-drying solutions containing β-galactosida...
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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09586946_v14_n6_p517_Burin http://hdl.handle.net/20.500.12110/paper_09586946_v14_n6_p517_Burin |
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paper:paper_09586946_v14_n6_p517_Burin2023-06-08T15:56:41Z Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems Burín, Leila Buera, María del Pilar Crystallization Enzyme activity Glass transition Maillard reaction Porosity Whey Retention of β-galactosidase activity was analyzed in whey model systems in relation to browning development and physical characteristics of the matrix (degree of matrix compression, crystallinity, glass transition). Amorphous systems were obtained by freeze-drying solutions containing β-galactosidase and reduced lactose milk whey, with or without maltodextrin. Samples (porous or previously compressed) were exposed to atmospheres of relative humidities of 0%, 22% or 44% and stored at 70°C. Remaining enzymatic activity and color development were determined at selected time intervals. The decrease of enzyme activity was simultaneous to browning development, which was in turn accelerated in the low porosity samples and affected by the glass transition of the systems and lactose crystallization. The addition of maltodextrin improved retention of enzyme activity and delayed both browning development and lactose crystallization. © 2003 Elsevier Ltd. All rights reserved. Fil:Burin, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Buera, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09586946_v14_n6_p517_Burin http://hdl.handle.net/20.500.12110/paper_09586946_v14_n6_p517_Burin |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Crystallization Enzyme activity Glass transition Maillard reaction Porosity Whey |
| spellingShingle |
Crystallization Enzyme activity Glass transition Maillard reaction Porosity Whey Burín, Leila Buera, María del Pilar Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| topic_facet |
Crystallization Enzyme activity Glass transition Maillard reaction Porosity Whey |
| description |
Retention of β-galactosidase activity was analyzed in whey model systems in relation to browning development and physical characteristics of the matrix (degree of matrix compression, crystallinity, glass transition). Amorphous systems were obtained by freeze-drying solutions containing β-galactosidase and reduced lactose milk whey, with or without maltodextrin. Samples (porous or previously compressed) were exposed to atmospheres of relative humidities of 0%, 22% or 44% and stored at 70°C. Remaining enzymatic activity and color development were determined at selected time intervals. The decrease of enzyme activity was simultaneous to browning development, which was in turn accelerated in the low porosity samples and affected by the glass transition of the systems and lactose crystallization. The addition of maltodextrin improved retention of enzyme activity and delayed both browning development and lactose crystallization. © 2003 Elsevier Ltd. All rights reserved. |
| author |
Burín, Leila Buera, María del Pilar |
| author_facet |
Burín, Leila Buera, María del Pilar |
| author_sort |
Burín, Leila |
| title |
Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| title_short |
Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| title_full |
Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| title_fullStr |
Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| title_full_unstemmed |
Retention of β-galactosidase activity as related to Maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| title_sort |
retention of β-galactosidase activity as related to maillard reaction, lactose crystallization, collapse and glass transition in low moisture whey systems |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09586946_v14_n6_p517_Burin http://hdl.handle.net/20.500.12110/paper_09586946_v14_n6_p517_Burin |
| work_keys_str_mv |
AT burinleila retentionofbgalactosidaseactivityasrelatedtomaillardreactionlactosecrystallizationcollapseandglasstransitioninlowmoisturewheysystems AT bueramariadelpilar retentionofbgalactosidaseactivityasrelatedtomaillardreactionlactosecrystallizationcollapseandglasstransitioninlowmoisturewheysystems |
| _version_ |
1768543142952304640 |