EFFECTS OF HYDROCOLLOIDS ON PHYSICAL STABILITY, RHEOLOGICAL AND SENSORY PROPERTIES OF MILK–ORANGE JUICE MIXTURE

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MOHAMMADI SOUDABEH; ABBASI SOLEYMAN; HAMIDI ZOHREH

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Journal: Iranian Journal of Nutrition Sciences and Food Technology Year:2011 | Volume:5 | Issue:4 (19) Page(s): 1-12

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Title

EFFECTS OF HYDROCOLLOIDS ON PHYSICAL STABILITY, RHEOLOGICAL AND SENSORY PROPERTIES OF MILK–ORANGE JUICE MIXTURE

Author(s)

MOHAMMADI SOUDABEH | ABBASI SOLEYMAN | HAMIDI ZOHREH | Issue Writer Certificate

Keywords

MILKQ2

ORANGE JUICEQ2

STABILIZATIONQ3

HYDROCOLLOIDSQ2

TRAGACANTHQ3

PERSIAN GUMQ2

RHEOLOGYQ3

Abstract

Background and Objectives: One of the major defects in acidified MILK–fruit juice mixtures is their physical instability due to low pH, low viscosity, and sedimentation of caseins. In the present study, the influence of some commercial and local gums on the stability, rheological, and sensory properties of MILK–orange juice mixture was investigated.Materials and Methods: The effects of pectin, locust bean gum, guar gum, gum TRAGACANTH, PERSIAN GUM, water-soluble fractions of gum TRAGACANTH (tragacanthin) and PERSIAN GUM over a wide range of concentrations on the physical stability of MILK–orange juice mixtures during storage at low temperature (4oC, 30 days) were determined. Moreover, the STABILIZATION mechanisms were studied using rheological (rotational and oscillatory tests), zeta potential measurements, and microstructural observations. Finally, sensory evaluation was made on the physically stabilized samples.Results: Pectin, locust bean gum, guar gum, gum TRAGACANTH, PERSIAN GUM, and water-soluble fractions of TRAGACANTH and PERSIAN GUM effectively prevented phase separation for 30 days at concentrations of 0.5%, 0.5%, 0.4%, 0.3%, 2.2%, 0.175% and 1.0%, respectively. Furthermore, combinations of water-soluble fractions of gum TRAGACANTH and PERSIAN GUM (ratios of 4:96 and 19:81) at a concentration of 0.37% or 0.53% caused STABILIZATION. The best fitted rheological models for the control (MILK–orange juice mixture without HYDROCOLLOIDS), the pectin-containing one, and rest of the samples were Bingham, Herschel-Bulkley, and Power law, respectively. In terms of sensory properties, the mixture stabilized with a combination of water-soluble fractions of gum TRAGACANTH and PERSIAN GUM (0.53% w/w) achieved the highest scores by the taste panels (p<0.01).Conclusions: Based on the findings of the present study, water-soluble fractions of gum TRAGACANTH and PERSIAN GUM can be categorized as anionic HYDROCOLLOIDS which are adsorbed on the surface of caseins which can prevent aggregation via steric and electrostatic repulsions by simulating a hairy layer. In addition, their insoluble fractions could promote physical stability of the mixtures due to making a gel-like network and increasing viscosity.

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APA: Copy

MOHAMMADI, SOUDABEH, ABBASI, SOLEYMAN, & HAMIDI, ZOHREH. (2011). EFFECTS OF HYDROCOLLOIDS ON PHYSICAL STABILITY, RHEOLOGICAL AND SENSORY PROPERTIES OF MILK–ORANGE JUICE MIXTURE. JOURNAL OF NUTRITION SCIENCES & FOOD TECHNOLOGY, 5(4 (19)), 1-12. SID. https://sid.ir/paper/121226/en

Vancouver: Copy

MOHAMMADI SOUDABEH, ABBASI SOLEYMAN, HAMIDI ZOHREH. EFFECTS OF HYDROCOLLOIDS ON PHYSICAL STABILITY, RHEOLOGICAL AND SENSORY PROPERTIES OF MILK–ORANGE JUICE MIXTURE. JOURNAL OF NUTRITION SCIENCES & FOOD TECHNOLOGY[Internet]. 2011;5(4 (19)):1-12. Available from: https://sid.ir/paper/121226/en

IEEE: Copy

SOUDABEH MOHAMMADI, SOLEYMAN ABBASI, and ZOHREH HAMIDI, “EFFECTS OF HYDROCOLLOIDS ON PHYSICAL STABILITY, RHEOLOGICAL AND SENSORY PROPERTIES OF MILK–ORANGE JUICE MIXTURE,” JOURNAL OF NUTRITION SCIENCES & FOOD TECHNOLOGY, vol. 5, no. 4 (19), pp. 1–12, 2011, [Online]. Available: https://sid.ir/paper/121226/en

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