The analysis of nutritional value, total phenolic and flavonoid contents, and antioxidant activities from the ethanolic extracts of the roasted broken brown rice powder

Authors

  • Kulwadee Suwannatrai Program of Biology, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon, 47000 Thailand
  • Krittiyanee Namwongsa Program of Chemistry, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon, 47000 Thailand
  • Natenapa Phanomkhet Program of Biology, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon, 47000 Thailand
  • Hathaichanok Nuntapanich Program of Environmental Science, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, 34000 Thailand
  • Wuttichai Roschat Program of Chemistry, Faculty of Science and Technology, Sakon Nakhon Rajabhat University

DOI:

https://doi.org/10.55674/snrujst.v14i2.246426

Keywords:

Roasted broken brown rice powder, Ethanolic extracts, Total phenolic and flavonoid contents, Antioxidant activities, Nutritional value

Abstract

The objective of this study was to determine the nutritional value, total phenolic and flavonoid contents, and antioxidant activities of the roasted broken brown rice powder. The roasted broken brown rice powder was dried at 60 °C for 3 h in a hot air oven and extracted with absolute ethanol by using ultrasonic technique. Then, the sample was filtered to separate the residue and mixture solution and dried to remove the solvent by rotary evaporator for obtaining the ethanolic crude extract. Finally, the crude extract was collected and determined proximate composition, total phenolic content (TPC), total flavonoid content (TFC), and antioxidant capacity. The results revealed that the percentage crude extract of the extraction yield was 0.47% by weight with crude carbohydrate (74.47% w w−1), crude protein (8.11% w w−1), and fat (0.05% w w−1), respectively. The TPC and TFC were found at an average of 20.40 ± 0.37 mg GAE g−1 crude extract and 4.58 ± 0.19 mg QE g−1 crude extract, respectively. Moreover, the sample has highly efficient antioxidants activity similar to a standard Trolox solution. Therefore, it was reasonably concluded that the roasted broken brown rice powder product was rich in beneficial nutrients for the health effects and represented adding value to a by–product of rice production.

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Published

2022-05-01

How to Cite

Suwannatrai, K., Namwongsa, K., Phanomkhet, N., Nuntapanich, H., & Roschat, W. (2022). The analysis of nutritional value, total phenolic and flavonoid contents, and antioxidant activities from the ethanolic extracts of the roasted broken brown rice powder. SNRU Journal of Science and Technology, 14(2), 246426. https://doi.org/10.55674/snrujst.v14i2.246426