Abstract:
:The aim of this study was to investigate the role of process conditions and system composition on the acid-induced gelation of a mixture of milk protein and gum tragacanth. This was studied by determining the effects of co-solute (lactose) addition (3, 5 and 7%) and gelation temperature (25, 37 and 45°C) on the mixture's rheological properties and microstructure using a combination of techniques including small-deformation rheology and scanning electron microscopy. The presence of lactose played an important role in the microstructure formation of gels but did not change most rheological properties. The microstructure of gels formed in the presence of lactose was coarser and more particulate, but less interconnected; this can be explained by lactose's role in improving protein aggregation. Gels prepared at a lower temperature had a high structure strength, as indicated by their high storage modulus, τ(f) and G(f) values. Low gelation temperature also caused a more branched and homogenous microstructure.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Hatami M,Nejatian M,Mohammadifar MAdoi
10.1016/j.ijbiomac.2012.02.026subject
Has Abstractpub_date
2012-05-01 00:00:00pages
1109-15issue
4eissn
0141-8130issn
1879-0003pii
S0141-8130(12)00080-3journal_volume
50pub_type
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