Effect of particle size of rice bran on gamma-oryzanol content and compounds

Exploiting the bioactive properties of γ-oryzanol from bran of different exotic rice varieties

“…NSICR9 exhibit higher predominance of 24-MCAF and Maçarico and Ceres present higher amounts of CampF when compared with the remaining varieties. The concentrations obtained for γoryzanol are within the range found in the literature (79.2 to 912 mg/100 g) 13,16,17,[33][34][35] . Lower concentrations obtained can be related with the extraction techniques and quantification with different temperatures and solvents, which may affect not only the lipid yield 36 but also the γ-oryzanol content 11,12,16,37 .…”

“…Other important factors affecting γ-oryzanol contents may be related to the rice post harvesting treatments, such as drying, storing temperature, packaging type 14 and the sample particle size 13 . On the other hand, the results can be expressed in different bases, such as rice bran oil, refined rice bran oil or rice bran itself, which may result in a difficult comparison.…”

“…Those benefits arise mostly from phytochemicals existing on rice bran lipid fraction, mainly γ-oryzanol, ferulic acid and tocotrienols 10 . From these three compounds, γ-oryzanol is the most representative, ranging from 79.2 to 912 mg/100 g on rice bran, depending on the bran origin and other factors such as extraction methods [11][12][13][14][15][16] . The γ-oryzanol is a mixture of ferulate esters of sterols and triterpene alcohol and almost 95% of total γ-oryzanol content is represented by four major compounds: 24methylenecycloartanyl ferulate, cycloartenyl ferulate, campesteryl ferulate and β-sitosteryl ferulate, by decreasing order of abundance 17,18 .…”

Supercritical Carbon Dioxide Extraction, Antioxidant Activity, and Fatty Acid Composition of Bran Oil from Rice Varieties Cultivated in Portugal

“…RBO contains about 43.7% monounsaturated fatty acids, 32.7% polyunsaturated, and 23.6% saturated [11]. The major bioactive phytochemicals in rice bran oil (unsaponifiable constituents of RBO) are γ-oryzanols (ferulic esters of sterols, 0.35%-3.2%), phytosterols (0.78%), and tocols (tocopherols and tocotrienols, the family of vitamin E-active substances, 0.025%-0.24%), that are known for having antioxidant activity [6,[12][13][14][15].…”

Determination of γ-oryzanol, Phenolic total content, and (2,2-difenil-1-picrylhydrazyl) Radical Scavenging Activity in Different Varieties of Rice (Oryza sativa) in Yogyakarta, Indonesia

“…Hasil pengukuran menunjukkan terdapat 2 λmaksimum yaitu pada 344nm dan 520nm. Pada λ 344 nm, 3 puncak muncul pada komparator karena γ-oryzanol diketahui memiliki tiga komponen utama yaitu sikloartenil ferulat, 24metilen sikloartenil ferulat dan kampesteril ferulat (Gambar 5) (Massarolo et al, 2017). Mereka adalah tiga komponen utama dan merupakan 80% kandungan γ-oryzanol (Xu et al, 2001a).…”