نتایج جستجو برای: protection of natural resources

تعداد نتایج: 21227798  

Journal: :iranian journal of pharmaceutical research 0
p khazaeli m mehrabani

natural substances extracted from plants have recently been considered as potential sunscreen resources because of their ultraviolet ray absorption in the uva region and their antioxidant activity. in the present study, the uv protective effects of ethyl acetate extracts of some common medicinal plants, which have flavonoids and other phenolics as the most important components, were evaluated u...

Background and aim: Today, the scientific outputs of universities are quantitatively and qualitatively measured using scientometrics on which the scientific progress of these institutions is evaluated. The purpose of this study was to evaluate the scientific outputs of agricultural colleges in State Khuzestan Universities during 1989-2008 and to assess the scientific status of these institution...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1390

apart from other aspects, desert is a natural environment and is one of the appealing terrestrial elements. putting its symbolic and fictional senses aside, the term “desert” bears mystic sense more than material sense. in addition to the worlds materialistic experiences, desert has attracted the attention of writers because it creates a kind of inner experience, which returns the individual in...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
کوروش روستا استادیار گروه ترویج و آموزش کشاورزی دانشگاه آزاد اسلامی واحد بیرجند محمد حاجی آبادی کارشناس ارشد ادارة کل منابع طبیعی استان خراسان جنوبی

the purpose of this present study is recognizing suitable extension methods and techniques influencing utilize knowledge, attitude and skills of natural resources perimeter sustainable management of natural resources. in this research sustainable management of natures resources is to struggle for prevention of changing renewable nature resources to lands agricultural, prevention of use more fro...

The protection and improvement of natural resources especially for desert vegetation need a comprehensive recognition of natural resources and relationship on Soil characteristics. One of the most important species growing in sabzevar desert is Stipagrostis pennata and in the current research the relationship between the physicochemical properties of the soils and growth characteristics of the ...

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The logit regression model was used to measure the willingness to pay, and the parameters of this model were estimated based on maximum likelihood (probability) method. For this purpose, 377 double-duplex questionnaires were completed by random sampling method in Kohgiluyeh va Boyer Ahmad provinces. Based on the results, over 68.3% of respondents, they expressed their desire to participate in t...

Factorizing a system is one of the best ways to make a system intelligent. Factorizing the protection system, providing the right connecting agents, and transmitting the information faster and more reliably can improve the performance of a protection system and maintain system reliability against distributed generation resources. This study presents a new method for coordinating network protect...

Journal: Iranian Economic Review 2017

Abstract N owadays, conservation, maintenance and monitoring of natural resources according to estimated benefits and costs, plays an important role in economic growth and sustainable development. Economic development along with environmental protection, while preserving economic competitiveness by providing eco-friendly technologies, will prevent of loss and waste of environmental r...

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