[Proteinases, alpha-amylase and lipases from mink pancreas in relation to feed utilization and in-vitro determination of feed quality]

aliment pour animaux amilasas amylase amylases analytical methods appareil digestif digestibilidad digestibility digestive system esterasas esterase esterases feeds fur bearing animals in vitro experimentation minks pancreas piensos proteasas protease proteases sistema digestivo technique analytique vison