Document Detail


Studies of the protein and the energy metabolism in man during a wintering in Antarctica.
MedLine Citation:
PMID:  22502627     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
During the 29th Soviet Antarctic Expedition in Novolazarevskaya from March 1984 to March 1985, the protein and energy metabolisms were studied in six expeditioners from the German Democratic Republic. The investigations were carried out at the beginning of the expedition (May), during the polar night (July) and during the polar day (December). The effect of a special stress situation (sledge trek in April 1984) was investigated in one subject. The stable nitrogen isotope (15)N was used to study the protein metabolism. The assessment of the energy metabolism was based on the oxygen consumption, which was determined by means of a spirograph. In addition, the vital capacity, the breath minute volume, the blood pressure, etc. were measured. The following results were obtained: During the polar night, the utilisation of the dietary proteins and the whole body protein synthesis calculated by means of the (15)N excretion of the total nitrogen in urine were greater (73.6±0.9 % and 3.48±0.17 g protein d(-1) kg(-1), n=3) than the respective values during the polar day (69.7±1.2, p<0.05, n=3 and 3.05±0.07, p<0.05, n=3) and at the beginning of the expedition (69.6±1.4, p<0.02, n=5 and 2.81±0.09, p<0.01, n=5). The lowest values (58.0 % and 2.43 g protein d(-1) kg(-1)) were obtained in the subject after the trek. The resting metabolic rate (in kJ d(-1) m(-2)) was decreased during the polar night (45.6±5.0, n=4) in comparison with the polar day (61.5±11.3, n=3) and the beginning of the expedition (52.3±9.6, n=4) with p<0.01 in both cases.
Authors:
Peter Junghans; Georg Schrader; Hans Faust; Barbara Wagner; Klaus Hirschberg; Rolf Reinhardt
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Isotopes in environmental and health studies     Volume:  48     ISSN:  1477-2639     ISO Abbreviation:  Isotopes Environ Health Stud     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-04-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9602611     Medline TA:  Isotopes Environ Health Stud     Country:  England    
Other Details:
Languages:  eng     Pagination:  208-25     Citation Subset:  IM    
Affiliation:
a Central Institute for Isotope and Radiation Research , Academy of Sciences of the GDR , Leipzig , Germany.
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