title: Respective role of microgravity and cosmic rays on Paramecium tetraurelia cultured aboard Salyut 6.
abstract: Paramecium tetraurelia cultured aboard Salyut 6 have shown in increase in cell growth rate, cell volume, water content and changes in electrolyte content. Additional experiments, carried out in balloon flight and on earth, showed that the stimulating effect observed on cell proliferation is related to exposure to cosmic rays. Other changes seem to be due to a direct effect of microgravity on cell. Mechanism of gravity action on cell is discussed.
authors.affiliation: Laboratoire de Biologie Medicale, Faculte de Medecine, Toulouse, France.
authors.forename: H
authors.initials: H
authors.lastname: Planel
authors.forename: R
authors.initials: R
authors.lastname: Tixador
authors.forename: G
authors.initials: G
authors.lastname: Richoilley
authors.forename: G
authors.initials: G
authors.lastname: Gasset
authors.forename: J
authors.initials: J
authors.lastname: Templier
mesh_terms: D000818:Animals; D018533:Biomass; D002118:Calcium / Q000378:metabolism; D015169:Colony Count, Microbial; D003359:Cosmic Radiation; D008274:Magnesium / Q000378:metabolism; D016805:Paramecium tetraurelia / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism / Q000528:radiation effects*; D015800:Protozoan Proteins / Q000378:metabolism; D013026:Space Flight; D014893:Weightlessness
chemical_list: D015800:Protozoan Proteins; D008274:Magnesium; D002118:Calcium