Yoghurt mix was prepared by adding 6 g sucrose to 100 mL
chilled standardized milk. Each mix was then divided into 7 experimental
lots; each onewas subsequently incorporated with inulin or
polydextrose at 1, 2 and 3 g/100 mL, i.e., the sample without any
addition as a control. Each sample (2 L) was heated to 70 C in an
open kettle immersed in boiling water and homogenized with
a hand homogenizer (Ystral X10/25, Ballrechten-Dottingen,
Germany) at 16,000 rpm for 3 min. The mixes were pasteurized at
90 C for 5 min and then rapidly cooled in chilledwater to 45 C. The
mixes were inoculated with the frozen and thawed yoghurt culture
(2.5 mL/100 mL) and agitated thoroughly to ensure uniform distribution
of the culture. The yoghurt mixes were transferred into
cylindrical glass bottles for texture analysis (170 g) and apparent
viscosity test (60 g), centrifuge tubes for WHC measurement (25 g),
plastic cups for physicochemical analysis (35 g) and sensory test
(30 g). All containers were closed with their covers and incubated at
42 C until the pH declined to 4.5 (within 8 h) and the samples were
transferred carefullyand kept in a refrigerator at 4 C before analyses
and measurements of their properties.