We analyzed the trade-offs between fitness components detected in four experiments in which traits were manipulated by inserting small (control) and large (treatment) P-elements into the Drosophila melanogaster genome. Treatment effects and the interactions of treatment with temperature, experiment, and line were caused by the greater length and different positions of the treatment insert. In i...

This article is dedicated to quantitatively and systematically revealing the changes of mechanical properties bake hardening AA6014 alloy during six-month natural aging in detail. Three directions (0, 45, 90° relative rolling direction) aluminum sheets 16 time points within six months were selected conduct experiments. The change trend (0.2% offset yield strength, ultimate tensile plastic exten...

This paper deals with the effect of drying as a moisture diffusion process in a segment of a typical box-girder bridge. Pore relative humidity distributions throughout the cross sections of the plates of the girder are calculated from the diffusion equation, taking its nonlinearity and aging into account. The effect of creep with aging on the stresses produced by drying shrinkage is taken into ...

Abstract This study aims to discover the stress-state dependence of dynamic strain aging (DSA) effect on deformation and fracture behavior high-strength dual-phase (DP) steel at different temperatures (25–400°C) reveal damage mechanisms under these various configurations. To achieve stress states, predesigned specimens with geometric features were used. Scanning electron microscopy was applied ...

Aging phenomena have been studied in very different materials like polymers, supercooled liquids or disordered orientational crystals. We recall here the main features of aging in spin glasses, and use this example of magnetic systems as a guideline for the description of the others. A particular attention is put on the sensitivity of aging to the cooling rate and to temperature variations. Thi...

Senescente-accelerated prone (SAMP) strain 8 mice suffer an earlier development of cognitive aging-related pathologies and a shorter life span than conventional mice. Protein alterations in astrocytes, in addition to those in neurons, may contribute to neurodegenerative damage. We used proteomics to study cell-specific early markers of brain aging-related degeneration in SAMP8. The 2-D protein ...

Nanoindentation of cellulose diacetate-graft-poly(lactide)s (CDA-g-PLLAs) synthesized by ring opening graft copolymerization of L-lactide in bulk onto the residual hydroxyl positions on CDA were conducted to investigate the effect of the molecular composition and thermal aging on mechanical properties and creep behavior. Continuous stiffness measurement (CSM) technique was used to obtained hard...

Proton exchange membrane fuel cells typically consist of stacks of membrane electrode assemblies sandwiched between bipolar plates, effectively combining the individual cells in series to achieve the desired voltage levels. Elastomeric gaskets are commonly used between each cell to insure that the reactant gases are isolated; any failure of a fuel cell gasket can cause the reactants to mix, whi...