نتایج جستجو برای: heat ageing
تعداد نتایج: 225903 فیلتر نتایج به سال:
Abstract As an alternative to mitigate the urban heat island effect, materials known as “cool surfaces” are a suitable passive technology for reducing transmittance into buildings and diminishing electricity demand cooling. However, due ageing, performance of cool surfaces becomes less effective, with decreasing solar reflectance generated by dust accumulation microbial growth. there is little ...
This study proposes a simple and novel synthesis route for rhombohedral single crystals (<2µm) of magnesite. This synthesis can be summarized by two main sequential reactions: (1) aqueous carbonation of synthetic brucite (Mg(OH) 2) by injection of CO 2 in a highly alkaline medium (2Molal of NaOH) at ambient temperature (∼20°C), leading to precipitation of platy-compacted aggregates of dypingite...
Objectives: Ageing and its consequences at the onset of the third millennium is becoming one of the major population-related issues in all countries. Methods & Materials: At present, Iran is undergoing a population transformation from a young age structure to an old age one. Although at the time being the elderly population (60 years and over) is rather small proportion of total population, ...
This is an overview of the phenomenon of population ageing and ageing trends in Jamaica. It documents landmark policy achievements and responses to population ageing and analyses related social, economic and health implications, as well as, the challenges and opportunities of ageing. The interdigitations of ageing issues and public health is manifest from the early historical milestones in agei...
Background & Aims: Diabetes mellitus (DM) affects 4.5 million individuals in Iran. DM has a chronic, progressive nature and is associated with long-term complications, which adversely affect health due to the adoption of improper coping mechanisms, stemming from the psychological factor of ageing perception. The present study aimed to determine the correlation between the perception of aging an...
Heat treatment is an eco-friendly and efficient way to improve the defective properties of wood, such as its hygroscopic nature, lack dimensional stability, low resistance against biological degradation, produce a green sustainable wood material for construction buildings. However, these treatments alter substrates could influence performance coating products necessary maintain surface features...
AgeFactDB (http://agefactdb.jenage.de) is a database aimed at the collection and integration of ageing phenotype data including lifespan information. Ageing factors are considered to be genes, chemical compounds or other factors such as dietary restriction, whose action results in a changed lifespan or another ageing phenotype. Any information related to the effects of ageing factors is called ...
Shelf life prediction for liquid fuels depends on a reliable and efficient accelerated ageing method. Most of the available researches in this area are limited to isothermal ageing. Therefore, these isothermal ageing methods are not capable to predict shelf life for fuels at non-isothermal ageing conditions. In the previous work, a new approach called reaction severity index was proposed for t...
Abstract A newly developed heat-resistant austenitic steel, Sanicro 25 is currently considered the leading candidate material for an advanced ultra-supercritical installation. The test was subjected to long-term ageing (up 30,000 h) at 700 and 750 °C, after which investigations into microstructure, identification of precipitates, testing mechanical properties were conducted. had microstructure ...
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