Influences of a low molecular humic substance on pre- and postnatal development of rats

acide humique additif aux aliments des animaux aditivos de piensos animal de laboratoire animales de laboratorio digestive system diseases enfermedades del sistema digestivo feed additives feto foetus gestation humic acids laboratory animals maladie de l'appareil digestif malformation malformations organogenese organogenesis pregnancy rat rata rats toxicidad toxicity