نتایج جستجو برای: introductionin recent decades

تعداد نتایج: 755328  

Journal: :Remote Sensing 2022

With the rapid warming in past few decades, snow water equivalent (SWE) winter and spring decreased generally over Northern Hemisphere, but an increasing trend occurred some areas, especially east Siberia. In this paper, we analyze sources reasons for SWE increase Siberia since 1979 document projected future changes region. The were not significant four decades until 2000s, increased rapidly th...

This analysis was conducted on 31 synoptic stations in Iran. Initially, the Mann-Kendall test was administered in order to analyse the trend of alterations of these two components over time and the results suggest that 16% of the stations show significant relationship with annual precipitation (positive and negative). More stations showed significant relationships between sunspots and minimum a...

Journal: :environmental resources research 2013
gholamreza roshan

this analysis was conducted on 31 synoptic stations in iran. initially, the mann-kendall test was administered in order to analyse the trend of alterations of these two components over time and the results suggest that 16% of the stations show significant relationship with annual precipitation (positive and negative). more stations showed significant relationships between sunspots and minimum a...

Journal: :مرتع و آبخیزداری 0
زهرا عبدالعلی زاده دانشجوی دکتری مرتعداری، دانشگاه محقق اردبیلی، ایران. عطالله ابراهیمی دانشیار دانشکده منابع طبیعی و علوم زمین دانشگاه شهرکرد، ایران

sabzkouh protected area, with the variety of natural ecosystems and landscapes, is very rich from the point of diversity in climate, topography, habitats and wildlife that is located in central zagros. evidences show that its ecosystems such as other iranian semiarid natural ecosystems, undergone changes in their vegetation structure over the past years. obtaining multi-spectral and multi-tempo...

2017
Saskia van der Lee Susanne P. Stoof Mariette B. van Ravenhorst Pieter G.M. van Gageldonk Nicoline A.T. van der Maas Elisabeth A.M. Sanders Anne-Marie Buisman Guy A.M. Berbers

IntroductionIn 2012 a large epidemic of pertussis occurred in the Netherlands. We assessed pertussis toxin (PT) antibody levels in longitudinal serum samples from Dutch 10-18 year-olds, encompassing the epidemic, to investigate pertussis infection incidence. Methods: Blood was sampled in October 2011 (n = 239 adolescents), then 1 year (2012; n = 228) and 3 years (2014; n = 167) later. PT-IgG co...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1381

‏‎the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis , a one- way anova experimental design was carried out. 24 senior student of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inte...

Journal: :journal of biostatistics and epidemiology 0
elham ahmadnezhad national institute of health research, tehran university of medical sciences, tehran, iran zhaleh abdi department of health expenditure, national institute of health research, tehran university of medical sciences, tehran, iran abolhassan safdari department of infectious disease, zahedan university of medical sciences, zahedan, iran farshid fayyaz-jahani academic center for education, culture and research center, urmia, iran sheida malek-afzali department of environment and occupational health center, ministry of health, tehran, iran soraya fathollahi department of health in disasters and emergencies, international campus, tehran university of medical sciences, tehran, iran

background & aim: the aim of the study was to define the epidemiological characteristics of most important infectious diseases in iran in recent decades. methods & materials: this was a situation trend analysis of infectious diseases (vector and water borne disease, and food borne diseases) in recent decades based on data availability. three significance levels were used for mann-kendall test (...

Journal: :CSH protocols 2008
Olivier Mauti Thomas Baeriswyl Esther T Stoeckli

INTRODUCTIONIn ovo RNA interference (RNAi) is a method for silencing a gene of interest using a combination of in ovo injection and electroporation in avian embryos. Here we describe gene silencing in the developing spinal cord, but the procedure can easily be adapted to other parts of the nervous system. Double-stranded RNA (dsRNA) derived from the gene of interest is injected into the develop...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Nienke Vrisekoop Ineke den Braber Anne Bregje de Boer An F C Ruiter Mariëtte T Ackermans Saskia N van der Crabben Elise H R Schrijver Gerrit Spierenburg Hans P Sauerwein Mette D Hazenberg Rob J de Boer Frank Miedema José A M Borghans Kiki Tesselaar

In mice, recent thymic emigrants (RTEs) make up a large part of the naïve T cell pool and have been suggested to be a distinct short-lived pool. In humans, however, the life span and number of RTEs are unknown. Although (2)H(2)O labeling in young mice showed high thymic-dependent daily naïve T cell production, long term up- and down-labeling with (2)H(2)O in human adults revealed a low daily pr...

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