Biological bases of carcass and meat quality and their relationships with growth

National audienc

Efecto de la fuente de energía (glucosa o aceite de maíz) en la composición y en actividad de la enzima fosforilasa (A y B) en el músculo pectoralis superficialis de pollos en crecimiento

NO PRESENTA RESUME

Tentative de correlation entre caracteristiques musculaires et composition de carcasse a l'abattage de l'agneau.

5 illus.International audienc

Factors Influencing Color of Dark Cutting Beef Muscle

Color of dark cutting beef rib muscle was measured as affected by treatment with rotenone or chilling in an oxygen rich atmosphere. Samples homogenized with the mitochondrial inhibitor, rotenone, or pH 5.0 buffer remained red for up to 1 hr. Control samples blended with water remained red when chilled but turned dark when held at room temperature. Thin slices of dark cutting beef muscle would turn red when chilled in air or oxygen to 3°C, or when chilled in oxygen to 14°C, but would turn dark when transferred from oxygen at 3°C to air at room temperature. Thus, dark cutting beef muscle will turn red if mitochondrial respiration is inhibited, allowing myoglobin at muscle surfaces to remain oxygenated