Hole Anastasia S, Kjos Nils Petter, Grimmer Stine, Kohler Achim, Lea Per, Rasmussen Bård, Lima Lene R, Narvhus Judith, Sahlstrøm Stefan
Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences , P.O. Box 5003, N-1432 Ås, Norway.
J Agric Food Chem. 2013 Mar 20;61(11):2739-47. doi: 10.1021/jf3045236. Epub 2013 Mar 11.
To evaluate the bioaccessibility of phenolic acids in extruded and nonextruded cereal grains, an in vivo experiment was carried out using growing pigs as a model system. Four diets were prepared containing either whole grain barley (BU), dehulled oat (OU), or their respective extruded samples (BE, OE) according to the requirements for crude protein, mineral, and vitamin contents in pig diets. The total contents of free phenolic acids in the OE and BE diets were 22 and 10%, respectively, higher compared with the OU and BU diets, whereas the level of bound phenolic acids was 9% higher in OE than in OU and 11% lower in BE compared with BU. The total tract bioaccessibilities of bound phenolic acids were 29 and 14% higher for the extruded BE and OE diets, respectively, compared with the nonextruded diets. The results of this study indicate an improved bioaccessibility of phenolic acids in extruded cereal grains.
为评估挤压和未挤压谷物中酚酸的生物可及性，以生长猪作为模型系统进行了一项体内实验。根据猪日粮中粗蛋白、矿物质和维生素含量的要求，制备了四种日粮，分别含有全谷物大麦（BU）、去皮燕麦（OU）或它们各自的挤压样品（BE、OE）。与OU和BU日粮相比，OE和BE日粮中游离酚酸的总含量分别高出22%和10%，而结合酚酸的水平在OE中比OU高9%，在BE中比BU低11%。与未挤压日粮相比，挤压后的BE和OE日粮中结合酚酸的全肠道生物可及性分别高出29%和14%。本研究结果表明，挤压谷物中酚酸的生物可及性有所提高。
