title: Survival of nematode larvae after freezing over liquid nitrogen.
mesh_terms: D000818:Animals; D005615:Freezing; D007814:Larva; D009348:Nematoda; D009584:Nitrogen; D009815:Oesophagostomum; D012034:Refrigeration; D012756:Sheep; D014251:Trichostrongyloidea / Q000472:pathogenicity
chemical_list: D009584:Nitrogen