Effect of heat treatment on rheological properties of Bambangan (Mangifera pajang Kosterm) fruit juice

Jumardi Roslan, . and Hay Chye Ling, . and Mohd Dona Sintang, . and Suryani Saallah, . Effect of heat treatment on rheological properties of Bambangan (Mangifera pajang Kosterm) fruit juice. pp. 1-9. ISSN 2735-1084

Bambangan (Mangifera pajang Kosterm) is an indigenous fruit that can be found in Borneo Island including Sabah and Sarawak (Malaysia) Kalimantan (Indonesia) and Brunei. Besides being freshly eaten the pulp of bambangan fruit can be processed for juice production to expand its market potential. During the processing of fruit juice the application of heat treatment such as pasteurization and sterilization might influence their rheological behavior. Thus the present study aims to investigate the effect of heat treatment on the rheological properties of bambangan fruit juice (BFJ). The freshly squeezed BFJ was subjected to different heat treatment conditions; sterilization (121C 3 minutes) mild temperature long time (MTLT) pasteurization (65C 15 minutes) and high temperature short time (HTST) pasteurization (90C 1 minute). Rheological analysis of the heat-treated BFJ was performed using a rheometer at a shear rate ranging from 1 to 250 s and a temperature between 5C to 70C. Pasteurization at 90C for 1 minute (HTST) was found to be the most suitable heat treatment for the BFJ. At this condition the BFJ exhibited a non-Newtonian pseudoplastic fluid behavior (n1) fitted well with the Herschel-Bulkey model. The value of parameters obtained from Herschel-Bulkley equation for HTST treatment of bambangan juice were n 0.83 k 0.32 and yield stress 3.96. The viscosity values of HTST bambangan juice at the temperature of 5 20 40 and 70 C were 3.53 2.33 1.53 and 1.76 Pa.s respectively. This rheological information is of fundamental importance in optimizing equipment design process control and sensory evaluation.

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Abstract

Bambangan (Mangifera pajang Kosterm) is an indigenous fruit that can be found in Borneo Island including Sabah and Sarawak (Malaysia) Kalimantan (Indonesia) and Brunei. Besides being freshly eaten the pulp of bambangan fruit can be processed for juice production to expand its market potential. During the processing of fruit juice the application of heat treatment such as pasteurization and sterilization might influence their rheological behavior. Thus the present study aims to investigate the effect of heat treatment on the rheological properties of bambangan fruit juice (BFJ). The freshly squeezed BFJ was subjected to different heat treatment conditions; sterilization (121C 3 minutes) mild temperature long time (MTLT) pasteurization (65C 15 minutes) and high temperature short time (HTST) pasteurization (90C 1 minute). Rheological analysis of the heat-treated BFJ was performed using a rheometer at a shear rate ranging from 1 to 250 s and a temperature between 5C to 70C. Pasteurization at 90C for 1 minute (HTST) was found to be the most suitable heat treatment for the BFJ. At this condition the BFJ exhibited a non-Newtonian pseudoplastic fluid behavior (n1) fitted well with the Herschel-Bulkey model. The value of parameters obtained from Herschel-Bulkley equation for HTST treatment of bambangan juice were n 0.83 k 0.32 and yield stress 3.96. The viscosity values of HTST bambangan juice at the temperature of 5 20 40 and 70 C were 3.53 2.33 1.53 and 1.76 Pa.s respectively. This rheological information is of fundamental importance in optimizing equipment design process control and sensory evaluation.

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Item Type:	Article
AGROVOC Term:	Mangifera
AGROVOC Term:	Anacardiaceae
AGROVOC Term:	Fruit
AGROVOC Term:	Processing
AGROVOC Term:	Heat treatment
AGROVOC Term:	Pasteurization
AGROVOC Term:	Sterilization
AGROVOC Term:	Fruit juices
AGROVOC Term:	Rheological properties
AGROVOC Term:	Viscosity
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9686

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