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Title: Proliferation kinetics of paramecium tetraurelia in balloon-borne experiments

Abstract

Experiments were carried out to demonstrate the effect of cosmic radiation, at a balloon-flight ceiling of about 36,500 m (120,000 ft) on single-cell organism proliferation. Paramecium tetraurelia were placed in air-tight containers and maintained at 25 degrees +/- 0.1 degrees C. Cellular growth was determined by cell count, either after recovery or during the flight, by means of an automatic fixation device. Dosimetry was performed by a tissue equivalent proportional counter and was of about 0.5 mrad/h. Flight ceiling duration ranged from 48 min - 22 h. A secondary stimulating effect of growth rate, preceded by a temporary decrease, was observed after recovery. Because of the high bacterial concentration in the trans-Mediterranean flight culture medium, the temporary drop of the growth rate, due to the radiolysis products, disappears. Researchers consider that the stimulating effect can be the result of enzymatic intracellular scavenging of radiolysis products generated in the cell.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Laboratoire de Biologie Medicale, Faculte de Medecine, Purpan Universite Paul Sabatier-Toulouse-France
OSTI Identifier:
6867083
Resource Type:
Journal Article
Journal Name:
Aviat., Space Environ. Med.; (United States)
Additional Journal Information:
Journal Volume: 53:6
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; PARAMECIUM; BIOLOGICAL RADIATION EFFECTS; ALTITUDE; COSMIC RADIATION; DOSE-RESPONSE RELATIONSHIPS; DOSIMETRY; GROWTH; POPULATION DYNAMICS; ANIMALS; BIOLOGICAL EFFECTS; CILIATA; INVERTEBRATES; IONIZING RADIATIONS; MICROORGANISMS; PROTOZOA; RADIATION EFFECTS; RADIATIONS; 560131* - Radiation Effects on Microorganisms- Basic Studies- (-1987); 560112 - Radiation Effects on Biochemicals- In Microorganisms- (-1987)

Citation Formats

Croute, F, Soleilhavoup, J P, Vidal, S, Rousseille, R, and Planel, H. Proliferation kinetics of paramecium tetraurelia in balloon-borne experiments. United States: N. p., 1982. Web.
Croute, F, Soleilhavoup, J P, Vidal, S, Rousseille, R, & Planel, H. Proliferation kinetics of paramecium tetraurelia in balloon-borne experiments. United States.
Croute, F, Soleilhavoup, J P, Vidal, S, Rousseille, R, and Planel, H. 1982. "Proliferation kinetics of paramecium tetraurelia in balloon-borne experiments". United States.
@article{osti_6867083,
title = {Proliferation kinetics of paramecium tetraurelia in balloon-borne experiments},
author = {Croute, F and Soleilhavoup, J P and Vidal, S and Rousseille, R and Planel, H},
abstractNote = {Experiments were carried out to demonstrate the effect of cosmic radiation, at a balloon-flight ceiling of about 36,500 m (120,000 ft) on single-cell organism proliferation. Paramecium tetraurelia were placed in air-tight containers and maintained at 25 degrees +/- 0.1 degrees C. Cellular growth was determined by cell count, either after recovery or during the flight, by means of an automatic fixation device. Dosimetry was performed by a tissue equivalent proportional counter and was of about 0.5 mrad/h. Flight ceiling duration ranged from 48 min - 22 h. A secondary stimulating effect of growth rate, preceded by a temporary decrease, was observed after recovery. Because of the high bacterial concentration in the trans-Mediterranean flight culture medium, the temporary drop of the growth rate, due to the radiolysis products, disappears. Researchers consider that the stimulating effect can be the result of enzymatic intracellular scavenging of radiolysis products generated in the cell.},
doi = {},
url = {https://www.osti.gov/biblio/6867083}, journal = {Aviat., Space Environ. Med.; (United States)},
number = ,
volume = 53:6,
place = {United States},
year = {Tue Jun 01 00:00:00 EDT 1982},
month = {Tue Jun 01 00:00:00 EDT 1982}
}