نتایج جستجو برای: ecological factors

تعداد نتایج: 1163995  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1388

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

Journal: :journal of rangeland science 0
vahid karimian young researchers and elite club, yasooj branch, islamic azad university, yasooj, iran. mohammad reza vahabi assistant professor, department of range and watershed, natural resources college, isfahan university of technology, isfahan, iran. javad roustakhiz member of research instructor, department of plant production, higher education complex of saravan, iran. negin nodehi phd student of range management, gorgan university of agricultural sciences and natural resources sciences, gorgan, iran

the effect of environmental factors on plant vegetation is different. therefore, it is necessary to evaluate role of these factors in medicinal plants growth, development and essential oil. this study was performed to investigate the effect of factors on qualitative and quantitative variations of the essential oil of verbascum songaricum in its habitats in central zagros mountains, iran in 2012...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی و اجتماعی 1389

today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...

2009
Kahina Hamadache Luigi Lancieri

With the rapidly growing development of Computer Supported Collaborative Work technologies, the evaluation of these services becomes an essential aspect. This evaluation mixes technical, business, social, perceptive, ergonomic aspects which can’t be considered independently. In this paper we propose a new taxonomy of CSCW evaluation methods based on previous works and on our analysis of current...

Journal: :تحقیقات نظام سلامت 0
هدایت عباس تبار دانشجوی دکتری، گروه اپیدمیولوژی، دانشکده بهداشت و تغذیه، دانشگاه علوم پزشکی شیراز، شیراز، ایران مسعود سلیمانی دودران استادیار، گروه اپیدمیولوژی، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران پروین حمیدی فرد کارشناس، گروه بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. فرزاد جلیلیان کارشناس ارشد، گروه آموزش بهداشت، مدرس دانشگاه آزاد اسلامی، واحد همدان، همدان، ایران. مهدی میرزایی علویجه دانشجوی کارشناسی ارشد آموزش بهداشت، گروه آموزش بهداشت، دانشکده بهداشت، دانشگاه علوم پزشکی شهید صدوقی یزد، یزد، ایران. مصطفی نصیرزاده دانشجوی کارشناسی ارشد، کمیته تحقیقات دانشجویی، گروه آموزش بهداشت، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

background: breast cancer is the most common cause of cancer-related deaths among women worldwide. each year it is newly diagnosed in more than 1.1 million women around the world. the aims of this study were to investigate the role of dietary factors such as consumption of vegetables, fruits, dairy products, fried food, fish, and salt along with food, and factors such as weight, physical activi...

2015
Helen Dorn Tobias Törnros Markus Reichert Hans-Joachim Salize Heike Tost Ulrich Ebner-Priemer Andreas Meyer-Lindenberg H. Dorn T. Törnros M. Reichert

Mental health and well-being can be related to both individual as well as environmental factors. In order to address the latter relationship we use an Ecological Momentary Assessment (EMA) approach to capture the mood of 10 persons in real-time and real-life via questionnaires sent to their smartphones. This paper focuses on the timing of the questionnaire trigger. In order to avoid the questio...

The main purpose of the present study was to assess the ecological capability of agricultural soils using geographic information system (GIS). This research was conducted during 2014 in Hamedan Province, Iran. A cross-sectional study was conducted mapping the 10 factors of soil characteristics (texture, depth, erosion, and aggregation, percentage of slope, direction of slope, height, soil salin...

This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relation with environmental factors. For this purpose benthic communities of the Caspian Sea basin were studied seasonally during 2014 in 8 sampling sites. Temperature, salinity, dissolved oxygen, pH, nitrate, nitrite, silicate and pho...

Journal: :caspian journal of environmental sciences 2010
arekhi s.

the study was carried out in the ilam oak forest that is located in the west part of iran. the objective of this research was to determine the plant ecological groups and site classification in this region. data were collected from 117 sample plots using the systematic-random sampling method. the size of sampling plots was 20 m?20 m for the tree and shrub species and 1.5 m ?1.5 m for herbaceous...

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