نتایج جستجو برای: physical ageing
تعداد نتایج: 686545 فیلتر نتایج به سال:
In ageing populations many patients have multiple diseases characterised by acceleration of the normal ageing process. Better understanding of the signalling pathways and cellular events involved in ageing shows that these are characteristic of many chronic degenerative diseases, such as chronic obstructive pulmonary disease (COPD), chronic cardiovascular and metabolic diseases, and neurodegene...
According to Dannefer, context, broadly defined,1 ‘refers to the totality of the diverse range of phenomena, events and forces that exist outside the developing individual’ (1992: 84). The assumption that ageing occurs in context has meanwhile become, implicitly or explicitly, a core feature of models of ageing in biology, as well as those in the social and behavioural sciences. How such contex...
BACKGROUND Although the concept of healthy ageing has stimulated considerable interest, no generally accepted definition has been developed nor has its biological basis been determined. OBJECTIVE To develop a definition of healthy ageing and investigate its association with longevity and neuropathology. METHODS Analyses were based on cognitive, physical, and post-mortem assessments from 199...
a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...
in this study, pp films were modified with an organic pro-degradant in different concentrations (1, 2 and 3wt.%), exposed in the first step of degradation to natural ageing for 100 days followed by biodegradation insimulated soil in the respirometric test for 100 days. at the end of the combined degradation process the pp sampleswere characterized according to their morphological and physical p...
Objectives: To explain the physical and mental health of older people based on their demographic variables. Methods & Materials: A correlation design conducted through logistic regression. A demographic page and the Short Form (36) Health survey were administered by trained interviewers to 250 participants in Tehran, Iran in 2012. Participants were recruited based on a classified multi stage...
The paper aims to examine the population ageing as a new phenomenon effecting rural areas in Iran. Population ageing is going up throughout the country especially in the rural areas by 6.8 percent. fertility decline, increase in the youth migration to cities, and coming back to rural areas after retiring are the major factors which involve in rural ageing. This may jeopardize the communities. f...
introduction: diabetes mellitus is an growing national and international public health concern. the number of people affected by diabetes in world by 2030 will be 69% in developing countries. regular physical activity plays a key role in the management of type 2 diabetes melitus, particularly glycemic control. it has been recommended that peoples with type 2 diabetes participate in moderate-int...
In abiotic degradation the action of light radiation is one of the most important parameters, because polymers undergo degradation due to the action of light (natural or artificial). The aim of this study was to investigate the degradation rate for samples of polypropylene (PP) modified with an organic pro-degradant submitted to ageing in a natural environment and to accelerated ageing test. Th...
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