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Specimen Mass Measurement (M074)
Principal Investigator
Research Area:
Metabolism and nutrition
Species Studied
Scientific Name: Homo sapiens Species: Human

The objectives of the Specimen Mass Measurement experiment were to demonstrate the accuracy of mass measurement under weightless conditions, to validate the use of the Specimen Mass Measurement Device (SMMD) in measuring solids as well as fluids, and to support Skylab experiments M071and M073 which required mass determination. Experiment M071 was a metabolic balance study on changes in mineral and nitrogen balances and their effect on the musculoskeletal system. Experiment M073 involved analyzing urine samples to investigate biochemical changes caused by exposure to weightlessness. The SMMD supported these experiments by providing accurate mass measurements of food residues and fecal deposits.

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Thornton WE, Ord J. Physiologic Mass Measurements in Skylab. In: Johnson RS, Dietlein L, eds. Biomedical Results from Skylab. Washington, DC: NASA Headquarters; 1977; 175-81. NASA SP-377. [NTRS]

Thornton WE, Ord J. Physiologic Mass Measurements in Skylab. In: Johnston RS, Dietlein LF, editors. Proceedings of the Skylab Life Sciences Symposium; 1974 Aug 27-29; National Aeronautics and Space Administration, Johnson Space Center; 1974373-86. Report No: JSC-09275, Report No: TM X-58154. [NTRS]


Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Fecal weight
Food residue

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Skylab 2 05/25/1973 06/22/1973 28 days
Skylab 3 07/28/1973 09/25/1973 59.5 days
Skylab 4 11/16/1973 02/08/1974 84 days

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Eric Gallagher
Institutional Support
National Aeronautics and Space Administration (NASA)
Hardware Items