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Presence of mono-, di- and galactooligosaccharides in commercial lactose-free UHT dairy products

AuthorsRuiz-Matute, Ana I. ; Corzo-Martínez, Marta ; Montilla, Antonia ; Olano, Agustín ; Copoví, Paula ; Corzo, Nieves
Dairy drinks
Lactose-free UHT
Issue Date2012
CitationJournal of Food Composition and Analysis 28(2): 164-169 (2012)
AbstractIn this work a study of mono-, di- and galactooligosaccharide (GOS) content as well as the determination of thermal indicators of different commercial lactose-free UHT (LF-UHT) milks and dairy drinks has been carried out. Moreover, GOS formation during hydrolysis of lactose in a commercial UHT milk using Lactozym® pure 6500 was also studied. Presence of GOS was detected in all analyzed samples ranging from 950 to 4350mg/L in LF-UHT milks and from 600 to 2260mg/L in LF-UHT dairy drinks. Their GOS contents correlate roughly with the remaining lactose content of samples. During enzymatic hydrolysis of lactose in commercial UHT milk, the GOS formed reached a maximum about 10,000mg/L when 75-90% of lactose was hydrolyzed and then gradually decreased to values considerably lower than 5000mg/L when over 99% of the lactose was hydrolyzed. Therefore, GOS formation during low lactose milk manufacture might be improved by controlling enzymatic lactose hydrolysis so that it would be possible to elaborate low-lactose milk products able to satisfy the physiological requirements of the majority of intolerant groups and with a GOS content high enough to confer beneficial effect as prebiotic. © 2012 Elsevier Inc.
Publisher version (URL)https://doi.org/10.1016/j.jfca.2012.06.003
Identifiersdoi: 10.1016/j.jfca.2012.06.003
issn: 0889-1575
Appears in Collections:(CIAL) Artículos
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