نتایج جستجو برای: demography of ageing

تعداد نتایج: 21168220  

ژورنال: زیست شناسی ایران 2020

Governments around the world must rapidly mobilize and make difficult policy decisions to mitigate the coronavirus disease 2019 (COVID-19) pandemic. Because deaths have been concentrated at older ages, we highlight the important role of demography, particularly, how the age structure of a population may help explain differences in fatality rates across countries and how transmission unfolds. We...

Background Ageing has become a serious challenge in Hong Kong and globally. It has serious implications for health expenditure, which accounts for nearly 20% of overall government expenditure. Here we assess the contribution of ageing and related factors to hospitalisation days in Hong Kong. We used hospital discharge data from all publicly funded hospitals in Hong Kong between 2001 and 2012.  ...

Journal: :cell journal 0
saeid saeidimehr ammar ebrahimi najmaldin saki parisa goodarzi fakher rahim

ageing is a complex process and a broad spectrum of physical, psychological, and social changes over time. accompanying diseases and disabilities, which can interfere with cancer treatment and recovery, occur in old ages. micrornas (mirnas) are a set of small non-coding rnas, which have considerable roles in post-transcriptional regulation at gene expression level. in this review, we attempted ...

Objective: Ageing of the stored seed is a natural phenomenon and the seeds tend to lose viability even under ideal storage conditions. Accelerated ageing has been recognized as a good predictor of the storability of seed lots. Aged seeds show decreased vigor and produce weak seedlings that are unable to survive once reintroduced into a habitat. The characteristics of the chemical composition of...

Objective: Ageing of the stored seed is a natural phenomenon and the seeds tend to lose viability even under ideal storage conditions. Accelerated ageing has been recognized as a good predictor of the storability of seed lots. Aged seeds show decreased vigor and produce weak seedlings that are unable to survive once reintroduced into a habitat. The characteristics of the chemical composition of...

Abolfazl Mohammadzadeh Moghadam Amir Kavussi, Morteza Jalili Qazizadeh, Seyed Ali Ziaee,

This study was conducted in order to evaluate the effects of long term ageing on toughness and resilient modulus of asphalt concrete mixtures containing Electric Arc and Basic Oxygen Furnace steel slags. After initial evaluation of the properties of steel slags using X-ray Diffraction and Scanning Electric Microscope, eleven sets of laboratory mixtures were prepared. Each set was treated replac...

2013
Iona M. MacLeod Denis M. Larkin Harris A. Lewin Ben J. Hayes Mike E. Goddard

Whole-genome sequence is potentially the richest source of genetic data for inferring ancestral demography. However, full sequence also presents significant challenges to fully utilize such large data sets and to ensure that sequencing errors do not introduce bias into the inferred demography. Using whole-genome sequence data from two Holstein cattle, we demonstrate a new method to correct for ...

2007
Jennifer Johnson-Hanks

This paper argues that anthropological demography has, for most part, imported rather than exported theory. However, the discipline has the potential to generate important rethinking of population, culture, and their interaction. After discussing the challenges that must be faced in developing new theoretical approaches in anthropological demography, the paper suggests a framework for research ...

Journal: :دانش گیاه پزشکی ایران 0
جعفر ابراهیمی فر گروه حشره شناسی و بیماری های گیاهی، پردیس ابوریحان، دانشگاه تهران ارسلان جمشیدنیا گروه حشره شناسی و بیماری های گیاهی، پردیس ابوریحان، دانشگاه تهران حسین اللهیاری گروه گیاه پزشکی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج

the greenhouse whitefly, trialeurodes vaporariorum westwood (hem.: aleyrodidae) is a polyphagous and key pest that causes damaging to wide range of crops. the parasitoid wasp, eretmocerus delhiensis mani (hym.: aphelinidae) is a syn-ovigenic and thelytokous species that parasitizing greenhouse whitefly nymphs. in order to evaluation parasitoid wasp, eretmocerus delhiensis mani (hym.: aphelinida...

Journal: :Australian Population Studies 2017

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