Many studies have been conducted to promote germination in brown rice in order to improve its nutritional value in terms of enzymes, protein quality, and micronutrient content. The purpose of this study was to investigate the effect of millimeter wave on germination. Millimeter wave is a form of electromagnetic radiation with frequency between 30 and 300 GHz, and is also called 'biomicrowave'. Millimeter wave significantly stimulated germination. Total polyphenol content and DPPH radical scavenging activity also increased, especially at high frequency and prolonged dose. However, γ-aminobutyric acid content was diminished.
Keywords: antioxidant; brown rice; germination; millimeter wave; γ-aminobutyric acid.