2026-04-28T08:21:29Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/242722022-06-28T07:57:54Zcom_10324_1166com_10324_931com_10324_894col_10324_1338

Pérez Quirce, Sandra Ronda Balbás, María Felicidad Lazaridou, Athina Biliaderis, Costas G. 2017-07-07T10:56:48Z 2017-07-07T10:56:48Z 2017 Food Bioprocess Technology. 2017, 10(8), 1412-1421 1935-5130 http://uvadoc.uva.es/handle/10324/24272 10.1007/s11947-017-1910-7 1412 8 1421 Food Bioprocess Technology 10 Producción Científica Cereal β-glucan concentrates can be used in gluten-free breads to improve dough handling properties and quality of final products as well as to enhance their nutritional value; however, the presence of endogenous β-glucanases in rice flour, in combination with prolonged mixing, fermentation and proofing time, can cause a substantial reduction in β-glucan molecular weight, affecting detrimentally their efficacy for bioactivity. In this study, microwave (MIWA) heating was applied to the rice flours before breadmaking at different flour water contents (13-25%) and treatment times (0- 4min) to reduce β-glucanase activity. Gluten-free breads made from the MIWA treated rice flours were fortified with oat β-glucan concentrate to enhance their nutritional profile. The molecular weight of added β-glucan in the final products increased with increasing both flour water content and time of MIWA treatment, reflecting the magnitude of residual β-glucanase activity in the flour. Pretreatment with MIWA radiation for 4 min of the rice flour tempered at 25% moisture resulted in negligible residual β-glucanase activity and preserved to a great extent the molecular weight of β-glucans in the enriched breads. End-product quality was not affected by flour MIWA pretreatment, and even a slightly higher loaf specific volume was noted for breads made from the MIWA -treated flours (4min MIWA at 25% moisture content) compared to that of untreated flour. These findings can contribute to the improvement of nutritional value of rice-based gluten-free breads for celiac consumers as well as of any β-glucan containing yeast-leavened bakery product without altering its sensorial attributes. Additional studies are still required for further evaluation of the effect of more intense microwave treatment on rice flour and its application on breadmaking. application/pdf eng Springer info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International β-glucan molecular weight β-Glucanase inactivation gluten-free bread microwave treatment rice flour Effect of Microwave Radiation Pretreatment of Rice Flour on Gluten-Free Breadmaking and Molecular Size of β-Glucans in the Fortified Breads info:eu-repo/semantics/article http://www.springer.com/gp/ SI