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Electron microprobe analyses of Ca, S, Mg and P distribution in incisors of Spacelab-3 ratsThe distribution of Ca, S, Mg and P was mapped within the incisors of Spacelab-3 rats using an electron microprobe. The data indicate that Flight rats maintained in orbit for 7 days have significantly higher Ca/Mg ratios in dentin due to both higher Ca and lower Mg content than in dentin of ground-based Controls. There is no statistical difference in distribution of either P or S within Fligth animals and Controls, but there is clear indication that, for P at least, the reason is the greater variability of the Control data. These results are consistent with those obtained on a previous NASA/COSMOS flight of 18.5 days duration, although they are not pronounced. The results further suggest that continuously growing rat incisors provide useful records of the effects of weightlessness on Ca metabolism.
Document ID
19860045717
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rosenberg, G. D.
(Purdue University Indianapolis, IN, United States)
Simmons, D. J.
(Washington University St. Louis, MO, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1985
Publication Information
Publication: Physiologist, Supplement
Volume: 28
ISSN: 0031-9376
Subject Category
Life Sciences (General)
Accession Number
86A30455
Funding Number(s)
CONTRACT_GRANT: NASA ORDER A-21997-C
Distribution Limits
Public
Copyright
Other

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