نتایج جستجو برای: environmental cost and benefits
تعداد نتایج: 16920249 فیلتر نتایج به سال:
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
This book consists of 14 chapters covering important aspects in regards to various terrestrial ecosystems, wetlands, river systems, mine site rehabilitation, marsh ecology and heavy metals pollution. Also aims to fill some of the information gaps in ecological restoration, particularly in under-researched ecosystems around the world. Restoration ecology emerged as a separate field in ecology in...
despite the numerous advantages of large dams, there is still a deep suspicion about the real,long-term benefits and costs of their construction. land use change on a vast scale, displacement of a largepopulation of indigenous people, loss of biodiversity and production of greenhouse gas emissions, as well as environmental, socioeconomic and cultural consequences resulting therefrom, indicate c...
M.A. Abdoli 1 , B. Tavakoli *1,2, M.H. Menhaj3 1- Dept. of Environmental Engineering, University of Tehran, Faculty of Environmental Science, Tehran, Iran. 2-Dept. of Environment, Faculty of Natural Resources, University of Guilan, Someh Sara, Iran 3- Dept. of Rural Development, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran *Corresponding Author's E-mail: Babak_1...
the present study sought to examine whether a task-based approach could have an impact on raising awareness of collocations. moreover, it sought to investigate the facilitative role of consciousness-raising tasks of collocations in the communicative instances of use. to this end, 68 intermediate learners of english were selected via a placement test. the participants were taught with classroom ...
This study was on the analysis of livestock waste management practices among rural farmers in Abia State, Nigeria. A multi-stage sampling procedure was employed to select the 60 respondents for the study. Primary data used the study were collected using well-structured questionnaire. Descriptive statistical tools such as frequency counts, percentages, means, and multinomial logit regression wer...
in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...
This study examines the trade-off between the offered rental rate and on-farm and off-farm benefits made by North Carolina farmers during the 15 sign-up of the US Conservation Reserve Program. This program allows farmers to offer a ten year contract for an annual rental rate from the government to remove land from production and put it to a conservation use. Bid acceptance depends on the potent...
the caspian sea contains great resources of oil and gas. the caspian sea is a 700- mile- long body of water in central asia, land located between azerbaijan, iran, kazakhstan, russia and turkmenistan. iran was challenges and opportunities in the caspian region. key question in this thesis includes three section that first question, opportunities of iran in the caspian region, second question ch...
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