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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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Effect of thrust-weight ratios and specific impulses on trajectory parameters for earth orbit hyperbolic escape and entry
Minimum propellant consumption trajectories to Mars for constant-thrust, constant-specific impulse vehicles with optimum coasting periods
Direct calculation and tables of specific heats and related thermodynamic properties of arbitrary gas mixtures - Mars atmosphere model
Mach numbers from 0 to 100 for compressible gases with specific heat ratios 1.66 to 1.10 - table
Liquid cooled high specific impulse arc jet engine has measured engine thrust not completely aerodynamic in nature
Specifications for infrared acquisition and tracking system used for aircraft monitoring of Apollo command module reentry
High reliability specification for digital integrated circuits
Specific heat in coexistence region of water
Specific heat of superconductors containing paramagnetic impurities calculated, noting effect of ordering impurity spins
Emittance and specific heat determination by transient thermal vacuum technique using coatings as function of temperature
Biologically conjugated quantum dots (QDs) have shown great promise as multiwavelength fluorescent labels for on-chip bioassays and eukaryotic cells. However, use of these photoluminescent nanocrystals in bacteria has not previously been reported, and their large size (3 to 10 nm) makes it unclear whether they inhibit bacterial recognition of attached molecules and whether they are able to pass through bacterial cell walls. Here we describe the use of conjugated CdSe QDs for strain- and metabolism-specific microbial labeling in a wide variety of bacteria and fungi, and our analysis was geared toward using receptors for a conjugated biomolecule that are present and active on the organism's surface. While cell surface molecules, such as glycoproteins, make excellent targets for conjugated QDs, internal labeling is inconsistent and leads to large spectral shifts compared with the original fluorescence, suggesting that there is breakup or dissolution of the QDs. Transmission electron microscopy of whole mounts and thin sections confirmed that bacteria are able to extract Cd and Se from QDs in a fashion dependent upon the QD surface conjugate.
This study extends to the protein level our previous observations, which had established the stage and cellular specificity of expression of hsp86 and hsp84 in the murine testis in the absence of exogenous stress. Immunoblot analysis was used to demonstrate that HSP86 protein was present throughout testicular development and that its levels increased with the appearance of differentiating germ cells. HSP86 was most abundant in the germ cell population and was present at significantly lower levels in the somatic cells. By contrast, the HSP84 protein was detected in the somatic cells of the testis rather than in germ cells. The steady-state levels of HSP86 and HSP84 paralleled the pattern of the expression of their respective mRNAs, suggesting that regulation at the level of translation was not a major mechanism controlling hsp90 gene expression in testicular cells. Immunoprecipitation analysis revealed that a 70-kDa protein coprecipitated with the HSP86/HSP84 proteins in testicular homogenates. This protein was identified as an HSP70 family member by immunoblot analysis, suggesting that HSP70 and HSP90 family members interact in testicular cells.
This Specification defines Level-1A and 1B Data Products (GDS version ), which are generated from the software of ASTER Level-1 Data Processing Subsystem (Version 2.0).
The purpose of this document is to provide a complete specification for each ASTER standard data product.
A set of space environmental test specifications has been defined for spaceborne computer modules and is identified in IEEE P1156.4,.
This document contains the system specifications and requirements verification matrix for the Metroplex and TOS concepts developed during ATD-2 Phase 3.
This document contains the system specifications and requirements verification matrix for the core STBO capabilities developed during ATD-2 Phase 2 and Phase 3.
We present specific heat measurements in the 2 – 20 K range of several commercially available epoxies (Stycast 1266, Stycast 2850FT, EPO-TEK 377, and EPO-TEK 377H) and mixtures of one of these epoxy binders and fillers such as silica, carbon lamp black, and graphite. The results are briefly described in the context of the Debye model.