materials and methods weighted logistic regression models were used for the analysis of 1,248 cases and 39,995 controls from the 2005 california health interview survey (chis). results the prevalence of spd was 10% in cases and 4% in controls, respectively. the percentages of past and current smoking were higher in cases than controls (50% vs. 24% and 27% vs. 15%, respectively). after adjusting...

we and other studies have elucidated single molecules that can attenuate aging and extend longevity. indeed, these molecules could prevent age-associated diseases simultaneously and probably extending healthy-life spans. in this review, we discuss recent advances, controversies, opportunities and challenges surrounding ursolic acid (ua) in relationship with aging. in this regard, ua also known ...

there are some computer programs to calculate germination related traits such as germin which have using problems. the aim of this work was to adjust germin for calculating germination related traits. seed aging effects on the seedling emergence was modeled using the optimized germin. this study was conducted based on completely randomized design in a factorial combination of five seeds aging t...

the increasing number of aging people around the world, especially in developing countries, and its economic, social, and health consequences demonstrate the necessity of studies focusing on the elderly. the results of the studies can provide ways for solving the existing and future problems that are associated with the aging population. although research studies on elderly are conducted in ira...

Introduction: Raising the knowledge of skeletal and soft tissue changes with aging has been highly essential due to an increasing demand for aesthetic facial surgery following aging. The aim of this study is to evaluate the three dimensional computed tomographic images and process of changes in mandible with aging. Materials and Methods: In this descriptive study, the facial CT scans were obta...

Objectives: Successful aging is an interdisciplinary concept. Despite the great body of literature on successful aging, few studies have focused on its subjective and multidimensional measurements. Thus, the present study aimed to develop an instrument to measure self-perceived successful aging. Methods: We used a mixed method approach. The successful aging dimensions were explored through an ...

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In this article, the effect of hygrothermal aging on mechanical properties of fiber metal laminates (FMLs) and E-glass/epoxy (GE) composites is investigated. First, FML and GE specimens were built using wet lay-up technique under vacuum pressure. Hygrothermal aging simulation was then carried out on both specimen types in distilled water at a constant temperature of 90 °C for 5 weeks. The resul...

objectives : the aim of this study was to assess the effect of artificial accelerated aging (aaa) on color change of direct and indirect fiber-reinforced composite (frc) restorations. materials and methods: direct (z250) and indirect (gradia) composite resins were reinforced with glass (gf) and polyethylene fibers (pf) based on the manufacturers’ instructions. forty samples were fabricated and ...