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There are a total of 6945 record(s) matching your query.
Sorted by: Date Added To NTRS in Ascending order
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Microinterval analysis of the development of visual perception
Author(s): Makarov, P. O.
Abstract: Results of a microinterval analysis show a regular phased development of human visual color perception. The stages involved consist of preperception, achromatic perception, and chromatic perception. This pattern is evident ...
NASA Center: NASA (non Center Specific)
Publication Year: 1971
Added to NTRS: 2004-11-03
Accession Number: 72N15038; Document ID: 19720007388
Ejection time by ear densitogram and its derivative - Clinical and physiologic applications.
Author(s): Quarry-Pigott, V.; Chirife, R.; Spodick, D. H.
Abstract: Ear densitographic ejection times (EDET) and first derivative ear densitogram ejection times (dEDET) were studied to determine whether their reliability and validity justify their substitution for ejection times derived from ...
NASA Center: NASA (non Center Specific)
Publication Year: 1973
Added to NTRS: 2004-11-03
Accession Number: 73A38866; Document ID: 19730054064
X-15 nears 100th research mission with faster version due in 1964 news release 64-3
Abstract: Boundary layer, flight control, and structural dynamics research for x-15a aircraft
NASA Center: NASA (non Center Specific)
Publication Year: 1964
Added to NTRS: 2004-11-03
Accession Number: 64N12910; Document ID: 19640002997
Non-Darwinian evolution.
Author(s): Jukes, T. H.; King, J. L.
Abstract: NonDarwinian evolution of protein and DNA, comparing expectations of evolution models for protein and amino acid changes
NASA Center: NASA (non Center Specific)
Publication Year: 1969
Added to NTRS: 2004-11-03
Accession Number: 69A40060; Document ID: 19690062071
Origins of soviet aviation medicine
Abstract: Soviet aviation medicine and its origin
NASA Center: NASA (non Center Specific)
Publication Year: 1965
Added to NTRS: 2004-11-03
Accession Number: 65N21729; Document ID: 19650012128
Lymphoidal involution and delayed homograft rejection in hypoxia-exposed mice.
Author(s): Kmetz, J. M.; Anthony, A.
Abstract: Investigation of the relationship between histologic and cytochemical response patterns of the thymus, spleen, and lymph nodes of mice exposed to moderate hypoxia (380 mm Hg), and study, by histologic analysis, of the effect ...
NASA Center: NASA (non Center Specific)
Publication Year: 1972
Added to NTRS: 2004-11-03
Accession Number: 72A42675; Document ID: 19720059009
A new view of the ''synthesis of life.''
Author(s): Fox, S. W.
Abstract: Experimental research concerned with origin of life, studying synthesis of precursor polymers and self assembly into protocells
NASA Center: NASA (non Center Specific)
Publication Year: 1968
Added to NTRS: 2004-11-03
Accession Number: 69A23035; Document ID: 19690045046
Evolutionary clock - Nonconstancy of rate in different species.
Author(s): Jukes, T. H.; Holmquist, R.
Abstract: By using various methods for comparing polypeptide sequences we find that the evolutionary divergence of rattlesnake cytochrome c from cytochromes c of species in other classes has been more rapid than that of cytochrome c ...
NASA Center: NASA (non Center Specific)
Publication Year: 1972
Added to NTRS: 2004-11-03
Accession Number: 72A38551; Document ID: 19720054885
The method of constant periods
Author(s): Ivanov, A. I.
Abstract: This method for the determination of visual thresholds stems from the mechanism of sight itself, which reduces in the simplest cases to the temporal and spatial summation of photic stimuli on the retina and the transmission ...
NASA Center: NASA (non Center Specific)
Publication Year: 1971
Added to NTRS: 2004-11-03
Accession Number: 72N15063; Document ID: 19720007413
Bone at the cellular level - The effects of inactivity
Author(s): Jowsey, J.
Abstract: Effects of inactivity or immobilization on bone loss
NASA Center: NASA (non Center Specific)
Publication Year: 1971
Added to NTRS: 2004-11-03
Accession Number: 71N33258; Document ID: 19710023782
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