Improvement of carbohydrate quality in rice bran using microwave irradiation for Nile Tilapia feed production

Kovitvadhi Uthaiwan, . and Thongprajukaew Karun, . and Sansuwan Kanokwan, . and Kovitvadhi Satit, . and Somsueb Pisamai, . Improvement of carbohydrate quality in rice bran using microwave irradiation for Nile Tilapia feed production. pp. 104-116.

This study was performed to evaluate the effects of microwave irradiation duration (0 10 20 and 30 min) on chemical composition physicochemical properties and in vitro carbohydrate digestibility of rice bran. Moisture content was different among irradiated rice brans and decreased with longer irradiation time (P 0.05). This resulted in an increase in crude protein content on dry matter basis in rice bran irradiated for 10 min (P 0.05). This also caused a decrease in crude fibre content (P 0.05) with a relative increase in available carbohydrate (P 0.05). Lipid and ash contents did not change after irradiation. Microstructure thermal transition parameters and relative crystallinity were enhanced after irradiation. Changes in these characteristics resulted in the in vitro increase in carbohydrate digestibility using crude digestive enzyme extract from Nile tilapia Oreochromis niloticus (Linnaeus 1758). The relationship between microwave irradiation times (t) and carbohydrate digestibility (D) could be explained as a third order polynomial regression D 0.034t3“1.932t2 28.675t 570.733 (r2 0.884 P 0.001 n 24). The results indicate that microwave irradiation for 10 min is appropriate for improving the quality of available carbohydrate in rice bran for tilapia feed production.

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Abstract

This study was performed to evaluate the effects of microwave irradiation duration (0 10 20 and 30 min) on chemical composition physicochemical properties and in vitro carbohydrate digestibility of rice bran. Moisture content was different among irradiated rice brans and decreased with longer irradiation time (P 0.05). This resulted in an increase in crude protein content on dry matter basis in rice bran irradiated for 10 min (P 0.05). This also caused a decrease in crude fibre content (P 0.05) with a relative increase in available carbohydrate (P 0.05). Lipid and ash contents did not change after irradiation. Microstructure thermal transition parameters and relative crystallinity were enhanced after irradiation. Changes in these characteristics resulted in the in vitro increase in carbohydrate digestibility using crude digestive enzyme extract from Nile tilapia Oreochromis niloticus (Linnaeus 1758). The relationship between microwave irradiation times (t) and carbohydrate digestibility (D) could be explained as a third order polynomial regression D 0.034t3“1.932t2 28.675t 570.733 (r2 0.884 P 0.001 n 24). The results indicate that microwave irradiation for 10 min is appropriate for improving the quality of available carbohydrate in rice bran for tilapia feed production.

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Item Type:	Article
AGROVOC Term:	Tilapia
AGROVOC Term:	Irradiation
AGROVOC Term:	Feed production
AGROVOC Term:	Carbohydrates
AGROVOC Term:	Chemical composition
AGROVOC Term:	Physicochemical properties
AGROVOC Term:	In vitro
AGROVOC Term:	Digestibility
AGROVOC Term:	Moisture content
AGROVOC Term:	Crude protein
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23681

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