conclusions regular aerobic exercise could increase plasma klotho levels, and this could be an explanation for exercise-related anti-aging effects. background klotho is an anti-aging protein that is predominantly secreted by the kidneys. objectives the aim of the study was to measure and compare the circulating klotho levels in the serum of trained athletes and in healthy, non-athlete controls....

Wear of restorative materials has been characterized in vitro using single-pass sliding.'4 Wear patterns and surface structures of composite restorations in vivo have been reported by Kusy and Leinfelder5 and by O'Brien and Yee.6 However, there have been few reports on the correlation between in vitro and in vivo wear. One reason could be that the in vivo wear characteristics result from gradua...

background: men, much like women, are faced with age-related menopause-like symptoms as they age. in recent years, increasing attention has been drawn to clinical research into elderly men and their health-related quality of life. the aging male scales (ams) questionnaire is an international tool for assessing the health-related quality of life in elderly men. hence far this questionnaire has n...

Objective: To explore perceptions of aging among Korean undergraduate nursing students. Methods: The participants for the study were 102 undergraduate nursing students, selected from two universities in Korea. The questions were non-structured, open-ended in order for the students to make sufficiently complete statements regarding their experiences with aging. Results: The collected materials w...

Objective(s):Some pathologic situations such as diabetes and metabolic syndrome are associated with alternation in nitric oxide level. Incidence of these condition increases with aging. On the other hand, insulin secretion is modulated by nitric oxide, and nitric oxide synthase (NOS) activity is also altered in diabetes. In this study, modification in the enzyme activity associated with aging a...

The color stability of polyvinyl chloride, polyurethane, and silicone polymers for maxillofacial applications was determined after accelerated aging using reflectance spectrophotometry. On the basis of color stability after accelerated aging, and ease of processing, several silicone materials were the most promising.

The relaxation dynamics of many disordered systems, such as structural glasses, proteins, granular materials or spin glasses, is not completely frozen even at very low temperatures [1,2]. This residual motion leads to a change of the properties of the material, a process commonly called aging. Despite recent advances in the theoretical description of such aging processes, the microscopic mechan...

The stability of the physical properties of various commercially available maxillofacial prosthetic materials was evaluated with the use of an accelerated aging chamber. The tensile strength, maximum percent elongation, shear strength, tear energy, and Shore A hardness were determined before and after accelerated aging. Results indicate that silicone 44210, a RTV rubber, is a promising elastome...