Introduction: The aging process is characterized by physiological changes which impair numerous organs and systems, especially their functions [1]. Diffusion weighted magnetic resonance spectroscopy (DW-MRS), which introduces pairs of diffusion gradients to MRS, is of fundamental interest because it allows evaluation of the intrinsic diffusion properties of the metabolites, which is more releva...

In this assessment, hybrid composites were prepared from the combination of industrial waste, as marble waste powder (MWP) with conventional fillers, carbon black (CB) as well as silica as reinforcing material, incorporated with natural rubber (NR). The properties studied were curing, mechanical and swelling behavior. Assimilation of CB as well as silica into MWP containing NR compound responde...

Exposure to extended periods of sub-Tg temperatures causes physical changes in the molecular structure of epoxy resins and epoxy-based materials to occur. These physical aging mechanisms include the reduction in free volume and changes to the molecular configuration. As a result, mechanical, thermodynamic, and physical properties are affected in ways that can compromise the reliability of epoxy...

Proton exchange membrane fuel cell is a clean energy generator as it emits water by-product. The has various applications in stationary power generation and transportation. However, there need to improve durability for transportation applications. Fuel limited its performance degrades over period due aging, fault conditions. In this study, we have compared by using new cell, an aged cell. Degra...

The actuarial senescence (i.e., the rate of increase in adult mortality with age) was related to body mass, development period, and age at sexual maturity across 124 taxonomic families of terrestrial vertebrates. Model selection based on Akaike's information criterion values adjusted for small size showed that the rate of aging decreases with increasing body mass, gestation period, age at matur...

The 5-yr survival rate of renal allografts is significantly lower for grafts from older deceased donors than from younger deceased donors. For evaluation of the potential contribution of renal senescence in this shortened graft survival, glomerular function and structure were analyzed in allografts from deceased donors older than 55 yr ("aging") or younger than 40 yr ("youthful"). Aging donors ...

OBJECTIVE This study was designed to evaluate the effects of type I collagen degradation on the durability of three adhesive systems in the early phase of dentin bonding. METHODS Bonded dentin specimens were prepared using three different types of adhesive systems. Micro-tensile bond strength and degradation of collagen were tested before, and after 1 month or 4 months of aging in artificial ...

RESULTS: Forty-six patients were included. There was a positive correlation between sCML and sMG (coefficient of 0.77, p<0.0001). There was no correlation between actual age and sCML (p=0.769) or sMG (p=0.658). Interestingly, there was a significant positive correlation between perceived age and both sCML (coefficient of 0.552, p<0.0001) and sMG (coefficient of 0.378, p=0.010). There was no cor...

RESULTS: Forty-six patients were included. There was a positive correlation between sCML and sMG (coefficient of 0.77, p<0.0001). There was no correlation between actual age and sCML (p=0.769) or sMG (p=0.658). Interestingly, there was a significant positive correlation between perceived age and both sCML (coefficient of 0.552, p<0.0001) and sMG (coefficient of 0.378, p=0.010). There was no cor...