Physics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003adspr..32.1453k&link_type=abstract
Advances in Space Research, Volume 32, Issue 8, p. 1453-1457.
Physics
Scientific paper
The purpose of this study is to reveal the effect of chronic hypergravity exposure on the bone formation and the bone metabolism when mammals produce offspring in a 2G environment. We measured the length and width of the thighbone, the length of the pelvis, the width of the pelvic cavity and the width of the fourth cervical vertebra on the second (F2) and the third (F3) generation mice bred in a 2G environment every ten days from 20 days old to 60 days old in an experiment on bone formation. In an experiment on bone metabolism, we measured calcium and phosphorus in the bones of the F3 in the 2G group.Ratios of the thighbone length, pelvis length, pelvic cavity width, and fourth cervical vertebra width versus the body length were calculated.These ratios were higher in the 2G group than the control group during all measuring periods.Calcium and phosphorus concentrations in the thighbone and the lumbar vertebra were lower in the 2G group than in the control group. However, the calcium and phosphorus concentrations in the cervical vertebrae of the 2G group were higher. These results suggest that the influence of gravity load may vary in the bones.
Fujisawa Masashi
Ito Makoto
Iwasaki Katsunori
Kim Hungsoo
Kita Saeko
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