C1, contrast statement “barley-based diet vs wheat-based diet+β-glucans”; C2, contrast statement “barley-based diet vs barley-based diet+enzyme composite ”; C3, contrast statement “wheat-based diet+β-glucans vs wheat-based diets+β-glucans+enzyme composite”.
Odorous volatile fatty acids (valeric acid + isovaleric acid + isobutyric acid).
European odour units per cubic metre of air.