title: Freezing material without electricity.
abstract: When collecting in the field, biological samples can be kept cool at 0 C in ice slush, or frozen at -20 C in a crushed ice + salt (NaCl) cold mixture, in well-insulated containers, for several hours or days.
authors.affiliation: Biologisk Institutt, University of Bergen, Bergen, Norway. Berland@bio.uib.no
authors.forename: Bjørn
authors.initials: B
authors.lastname: Berland
mesh_terms: D000818:Animals; D001459:Bangladesh; D015925:Cryopreservation / Q000379:methods*; D004560:Electricity; D005393:Fish Diseases / Q000469:parasitology; D005399:Fishes; D010271:Parasites / Q000502:physiology*; D010273:Parasitic Diseases, Animal / Q000469:parasitology; D012621:Seasons; D013696:Temperature