Publication
The effect of rice bran oil coating in the Portuguese "Carolino" rice
| Summary: | This study aims to nutritionally enrich Portuguese “Carolino” white rice (Oryza sativa japonica) by incorporating rice bran oil (RBO) on grain surface. Three levels of RBO coating were used: 0% (control), 0.3% and 0.6% (w/w). Antioxidant capacity (DPPH and ABTS), vitamin E (, and - tocopherols), and Total fat % were determined. Also, acid value (AV) and peroxide value (PV) were measured on day one and after 183 days of storage to assess samples stability. Samples with 0.6% RBO presented significantly (p<0.05) higher concentrations of -tocopherol (39.52±12.57 g/g) and were the only sample where -tocopherol was quantifiable (14.05±1.85 g/g). DPPH increased with the RBO addition, but no significant differences were found by ABTS analysis. PV and AV increased over time, with 0.6% RBO samples presenting the highest values (p<0.05). Adding 0.6% of RBO to Carolino rice increased the tocopherols concentrations and antioxidant capacity, adding value to white rice. |
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| Main Authors: | Reis, Núria |
| Other Authors: | Pereira-Pinto, Ricardo; Vaz-Velho, Manuela |
| Subject: | Carolino rice Rice bran oil Vitamin E |
| Year: | 2022 |
| Country: | Portugal |
| Document type: | article |
| Access type: | open access |
| Associated institution: | Instituto Politécnico de Viana do Castelo |
| Language: | English |
| Origin: | Repositório Científico IPVC |
| Summary: | This study aims to nutritionally enrich Portuguese “Carolino” white rice (Oryza sativa japonica) by incorporating rice bran oil (RBO) on grain surface. Three levels of RBO coating were used: 0% (control), 0.3% and 0.6% (w/w). Antioxidant capacity (DPPH and ABTS), vitamin E (, and - tocopherols), and Total fat % were determined. Also, acid value (AV) and peroxide value (PV) were measured on day one and after 183 days of storage to assess samples stability. Samples with 0.6% RBO presented significantly (p<0.05) higher concentrations of -tocopherol (39.52±12.57 g/g) and were the only sample where -tocopherol was quantifiable (14.05±1.85 g/g). DPPH increased with the RBO addition, but no significant differences were found by ABTS analysis. PV and AV increased over time, with 0.6% RBO samples presenting the highest values (p<0.05). Adding 0.6% of RBO to Carolino rice increased the tocopherols concentrations and antioxidant capacity, adding value to white rice. |
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