نتایج جستجو برای: aging of materials
تعداد نتایج: 21203454 فیلتر نتایج به سال:
ABSTRACTSuccessful recruitment and retention for population-based longitudinal studies requires understanding facilitators and barriers to participation. This study explored Canadians' views regarding one such study, the proposed Canadian Longitudinal Study on Aging (CLSA). Focus groups of participants > or =40 years of age were held in six proposed CLSA data collection sites (Halifax, Montreal...
This paper describes the influence of seawater ageing on composites used in a range of marine structures, from boats to tidal turbines. Accounting for environmental degradation is an essential element in the multi-scale modelling of composite materials but it requires reliable test data input. The traditional approach to account for ageing effects, based on testing samples after immersion for d...
Background and Aim: Color match between prosthetic restorations and natural teeth is challenging in dentistry. The aim of the current study was to assess the effect of accelerated aging on color stability of two silica-based ceramics with leucite and lithium disilicate crystalline phases after glazing and polishing surface treatments. Materials and Methods: In this experimental study, 30 disc-...
Emissions from large-scale fires significantly contribute to the atmospheric burden of primary organic aerosol (OA).
Objectives: The aging of the population in recent years in Iran has raised concerns among policymakers in various fields. Some economic theories consider the changes in the age structure and population aging as one of the important issues affecting the income inequality of societies. This study aims to assess the effect of population aging on the income inequality in Iran. Methods & Materials:...
background and objectives: this study is the first research on the physiochemical characteristics, microbial population and microstructure of poosti cheese over 90-days of ripening. the main difference between poosti cheese and other types of traditional cheese is the skin, which is used for its storage. materials and methods: physicochemical characteristics including moisture, salt, ph, acidit...
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