Search Results - "Planel, H"

Effect of a continuous gamma irradiation at a very low dose on the life span of mice by Caratero, A, Courtade, M, Bonnet, L, Planel, H, Caratero, C

“…There is epidemiological evidence that suggests there are beneficial effects of ionizing radiation at low doses. Some experimental studies confirmed this…”
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Influence on cell proliferation of background radiation or exposure to very low, chronic gamma radiation by Planel, H, Soleilhavoup, J P, Tixador, R, Richoilley, G, Conter, A, Croute, F, Caratero, C, Gaubin, Y

“…Investigations carried out on the protozoan Paramecium tetraurelia and the cyanobacteria Synechococcus lividus, which were shielded against background…”
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Enzyme activities and membrane lipids in Artemia cysts after a long duration space flight by Gaubin, Y, Prévost, M.C, Cariven, C, Pianezzi, B, Planel, H, Soleilhavoup, J.P

“…In the Free Flyer Biostack Experiment (L.D.E.F. mission) investigations have shown that biological objects in a resting state can survive more than 5.5 years…”
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Influence of a long duration exposure, 69 months, to the space flight factors in Artemia cysts, tobacco and rice seeds by Planel, H, Gaubin, Y, Pianezzi, B, Delpoux, M, Bayonove, J, Bes, J C, Heilmann, C, Gasset, G

“…Three french laboratories have participated in the Free Flyer Biostack experiment. Artemia cysts, tobacco seeds and rice caryopsis and embryos were used…”
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Demonstration of a biological effect of natural ionizing radiations by Conter, A, Dupouy, D, Planel, H

“…The blue-green alga, Synechococcus lividus, was grown under various levels of radiations. Shielding of cultures with lead resulted in a lower cell growth rate:…”
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Space environmental factors affecting responses to radiation at the cellular level by Planel, H, Gaubin, Y, Pianezzi, B, Gasset, G

“…Previous space experiments suggest a high value for the RBE of cosmic radiation. A possible explanation could be a change in cell radiosensitivity due to a…”
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Radiation-induced changes in late effects and in developmental capacities of exposed artemia cysts by Gaubin, Y, Pianezzi, B, Planel, H

“…Artemia dry cysts from a Californian bisexual strain used in several space experiments were irradiated with 60Co gamma rays. The three cyst populations…”
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Theoretical and experimental investigations on the fast rotating clinostat by Ayed, M, Pironneau, O, Planel, H, Gasset, G, Richoilley, G

“…We have investigated both theoretically and experimentally the validity of the fast rotating clinostat to simulate microgravity for a free swimming single-cell…”
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Influence of Growth Phase on Radiation Stimulation of Proliferation in Synechococcus lividus in Culture by Conter, A., Dupouy, D., Planel, H.

“…Previous results from this laboratory have shown that background radiations or exposure to very low doses of chronic γ radiation can stimulate the…”
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Effects of Dose Rate on Response of Synechococcus lividus to Very Low Doses of Chronic γ Radiation: Influence of Enzymatic Equipment of Starting Cells by Conter, A., Dupouy, D., Planel, H.

“…The effects of chronic γ irradiation at dose rates ranging from 1.50 to 74.5 mGy/year on cell proliferation of Synechococcus lividus in culture are studied…”
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Effects of gravity and cosmic rays on cell proliferation kinetics in Paramecium tetraurelia by Tixador, R, Richoilley, G, Gasset, G, Planel, H

“…Space flights resulted in a stimulating effect on kinetics of proliferation in Paramecium tetraurelia. Additional experiments were performed in order to…”
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Effects of a very low dose rate of chronic ionizing radiation on the division potential of human embryonic lung fibroblasts in vitro by Croute, F, Vidal, S, Soleilhavoup, J P, Vincent, C, Serre, G, Planel, H

“…Among the various parameters that are supposed to play a role in aging at the cellular level, the "free radical theory" involves biochemical modifications that…”
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Effects of microgravity and hypergravity on the cell: investigations on Paramecium tetraurelia by Richoilley, G, Tixador, R, Templier, J, Gasset, G, Planel, H

“…Previous space CYTOS experiments have shown that space flights resulted in an increase in growth of Paramecia cultures. Microgravity is the major factor…”
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Paramecium tetraurelia Growth Stimulation under Low-Level Chronic Irradiation: Investigations on a Possible Mechanism by Croute, F., Soleilhavoup, J. P., Vidal, S., Dupouy, D., Planel, H.

“…Experiments were carried out to demonstrate the effects of low-level chronic irradiation on Paramecium tetraurelia proliferation. Biological effects were…”
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Effects of angular speed in responses of Paramecium tetraurelia to hypergravity by Planel, H, Richoilley, G, Caratero, C, Tixador, R, Caratero, A, Gasset, G

“…The paper shows the results of investigations carried out in a single cell organism. Paramecium tetraurelia exposed to different gravitational levels…”
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Radiation stimulation during the early stationary growth phase in Synechococcus lividus and its correlation with photooxidative stress occurring before the stationary phase by Conter, A, Dupouy, D, Vincent, C, Planel, H

“…The effects of chronic gamma radiation at dose rates ranging from 0.058 mGy d-1 on growth rate calculated during the early stationary phase were studied. A…”
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Respective role of microgravity and cosmic rays on Paramecium tetraurelia cultured aboard Salyut 6 by Planel, H, Tixador, R, Richoilley, G, Gasset, G, Templier, J

“…Paramecium tetraurelia cultured aboard Salyut 6 have shown in increase in cell growth rate, cell volume, water content and changes in electrolyte content…”
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Results on Artemia cysts, lettuce and tobacco seeds in the Biobloc 4 experiment flown aboard the Soviet Biosatellite Cosmos 1129 by Gaubin, Y, Planel, H, Gasset, G, Pianezzi, B, Clegg, J, Kovalev, E E, Nevzgodina, L V, Maximova, E N, Miller, A T, Delpoux, M

“…Artemia cysts, lettuce and tobacco seeds were flown aboard the Cosmos 1129 for 19 days. A correlative method was used in order to determine the passage of…”
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Effects of very low doses of ionizing radiation on the clonal life-span in Paramecium tetraurelia by Tixador, R, Richoilley, G, Monrozies, E, Planel, H, Tap, G

“…Effects of very low doses of ionizing radiation were investigated on life-span in Paramecium tetraurelia. After autogamy single cell cultures were place (1) in…”
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Ultrastructural investigations on two lymphoid cell lines from Niemann-Pick disease type B by Bes, J C, Salvayre, R, Levade, T, Caratero, C, Planel, H

“…Lymphoid cell lines (LCL) were established by Epstein-Barr Virus (EBV) transformation of blood B-lymphocytes from two different patients affected with…”
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