Fatty Acid Synthetase of Saccharomyces Cerevisiae
Saccharomyces cerevisiae light particle fraction containing fatty acid synthetase analyzed by density gradient method
RIBONUCLEIC ACID /RNA/↗
SEARCH · Engineering Papers
Results for “density distribution”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Study of nonparametric techniques for estimating reliability and other life quality parameters Final report
Nonparametric techniques for probability distribution, probability density, and hazard function estimates for life quality
Murthy, V. K.↗
Magnetosphere plasma properties during a period of rising solar activity - OGO-III.
Flux, energy distribution and density of ions and electrons in magnetosphere plasma during solar activity period determined by OGO-C electrostatic probes
Sagalyn, R. C.↗
The numerical integration of collapsing clusters.
Numerical integration of n bodies gravitational problem equations of motion, assuming constant density spherical distribution
Standish, E. M., Jr.↗
Molecular-beam time-of-flight spectroscopy.
Speed distribution and density of molecular beam from time domain measurements of propagated beam perturbations, discussing gate functions
Alcalay, J. A.↗
Penile erection evoked from forebrain structures in Macaca mulatta.
Penile erection electrically evoked from Macaca mulatta forebrain, measuring density and distribution of responding points
Mishkin, M.↗
Simple model for a rotating neutral planetary exosphere.
Neutral exosphere model for nonrotating planet permitting barosphere uniform rotation at certain angular velocity, determining velocity distribution and density
Hagenbuch, K. M.↗
Geographic evaluation of radar imagery of New England
Photointerpretation of radar photography of New England States for population density and distribution
Simpson, R. B.↗
An evaluation of flight data for the Apollo thermal protection system
A study was conducted to correlate Apollo ablation and thermal response flight data using advanced state-of-the-art analytical procedures. The agreement between flight data and predictions is consistently excellent for in-depth temperature distributions, char density profiles, and surface ablation, thus validating the analytical procedures.
Bartlett, E. P.↗
The ionosphere above Alma Ata during a solar eclipse
The eclipse effect was manifested during the second phase: the ionization of the F1- and F2-layers decreased and the minimum effective heights of E and F2 increased due to recombination processes. The manner in which electron density is distributed over the levels was ascertained from analysis of N(t) curves.
Rudina, M. P.↗
Aerosol physical properties from satellite horizon inversion
The feasibility is investigated of determining the physical properties of aerosols globally in the altitude region of 10 to 100 km from a satellite horizon scanning experiment. The investigation utilizes a horizon inversion technique previously developed and extended. Aerosol physical properties such as number density, size distribution, and the real and imaginary components of the index of refraction are demonstrated to be invertible in the aerosol size ranges (0.01-0.1 microns), (0.1-1.0 microns), (1.0-10 microns). Extensions of previously developed radiative transfer models and recursive inversion algorithms are displayed.
Gray, C. R.↗
Pore Structure Analysis of RSI Tile
Mercury porosimetry gives a means of characterizing RSI tile pore structure in terms of porosity, pore size distribution, bulk density, specific surface area, mean pore diameter, and mean fiber diameter. It also allows the determination of the effects of heat treatment on these parameters. It is limited in application to open-pored structures, however, since any closed pore volume is ignored.
Whittemore, O. J., Jr.↗
A study of cosmic-ray positron and electron spectra in interplanetary and interstellar space and the solar modulation of cosmic rays
The differential energy spectra of cosmic-ray positrons and negatrons with energies between approximately 11 and 1500 MeV was measured during the period 1968-1971 using a balloon-borne magnetic spectrometer. These measurements fill a gap in the previously existing data and permit the determination of the interstellar spectra of cosmic-ray positrons and electrons. Knowledge of these spectra provides a crucial tool for studies of the distribution and density of matter and magnetic fields in the interstellar medium and the origin and dynamics of energetic particles contained in the fields. The differential energy spectrum of interstellar electrons may be represented as a power-law, j alpha T to the -1.8 power for 100 MeV approximately T approximately 2 GeV, but must flatten considerably at lower energies. From the measured electron charge composition, it is concluded that the majority of cosmic-ray electrons with energies above approximately 10 MeV originate in primary sources.
Cummings, A. C.↗
An evaluation of the use of ERTS-1 satellite imagery for grizzly bear habitat analysis
Improved classification and mapping of grizzly habitat will permit better estimates of population density and distribution, and allow accurate evaluation of the potential effects of changes in land use, hunting regulation, and management policies on existing populations. Methods of identifying favorable habitat from ERTS-1 multispectral scanner imagery were investigated and described. This technique could reduce the time and effort required to classify large wilderness areas in the Western United States.
Varney, J. R.↗
The Mariner Jupiter/Saturn ring occultation experiment
Radio occultation measurements of Saturn's rings as measured by the Mariner Jupiter/Saturn radio science experiment are reported. These signal measurements provide information on size, distribution, and density of particle material found in the rings.
Eshleman, V. R.↗
Estimations of the smoothing operator response characteristics
The mean response characteristic of the graphical smoothing method is discussed. The method is illustrated by analysis of latitude observations at Washington from 1915.9 to 1941.0. Spectral density, frequency distribution, and distribution functions are also discussed.
Yatskiv, Y. S.↗
SAS-2 observations of gamma rays from the galactic plane
Preliminary data are given for the SAS-2 high energy galactic gamma ray observation. These data include both latitude and longitude distributions. The longitude distribution shows a high density region. The latitude distributions toward the center and the anti-center are markedly different, the former showing a two-component structure of half-widths of approximately 3 and 6 deg. The energy spectrum in the range 35 to 200 MeV is hard, consistent with cosmic ray interactions with interstellar matter, including neutral pions decay and emission from energetic electron interactions. The data is consistent with an interpretation in terms of the confinement of the cosmic rays in the spiral arms.
Thompson, D. J.↗
Structure-property relationships in thermomechanically treated beryllia dispersed nickel alloys
BeO dispersed nickel alloys, produced by powder metallurgy techniques, were studied extensively in stress rupture at 815, 982, and 1093 C (1088, 1255, and 1366 K) and by transmission electron microscopy. The alloys were subjected to a variety of thermomechanical treatments (TMT) to determine the benefits of TMT on properties. It is shown that the use of intermediate annealing treatments after 10 pct reduction steps is highly beneficial on both low and high temperature properties. It is indicated that the high temperature strength is not primarily dependent on the grain aspect ratio or texture but depends strongly on the dislocation density and distribution of dislocations in a stable substructure which is pinned by the fine oxide dispersion.
Grewal, M. S.↗