نتایج جستجو برای: environmental degradation

تعداد نتایج: 510880  

Journal: :international journal of environmental research 2014
m. mirzaebrahimtehrani m. abbaspour j. nouri n. mazloomi

pricing for an insurance policy can be described as the process of calculation of expectedcompensation to be paid to property losers as well as associated costs of potential risks. loss forecast isaccurate if the risks will be identified appropriately in order to calculate the frequency and expected severityof losses.this is particularly important about environmental risks since most of them ap...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم زمین 1387

چکیده ندارد.

Journal: :research in molecular medicine 0
zahra fathi department of microbiology, faculty of biological sciences, shahid beheshti university, tehran, iran gholamhossein ebrahimipour department of microbiology, faculty of biological sciences, shahid beheshti university, tehran, iran amirarsalan kavyanifard 2- department of science, payam noor university (pnu), p.o. box, 19395-3697, tehran, iran ziba najmi 1- department of microbiology, faculty of biological sciences, shahid beheshti university, tehran, iran

background: this study focused on isolation and identification of a phenanthrene (phe) degrader bacterium and optimization of environmental conditions for phe degradation. materials and methods: enrichment technique was used for isolation and the most effective isolate, named ap, selected based on its phe biodegradation abilities. the isolate was identified using morphological and biochemical t...

Journal: :Environmental research letters : ERL [Web site] 2012
David López-Carr

Migration necessarily precedes environmental change in the form of deforestation and soil degradation in tropical agricultural frontiers. But what environmental factors may contribute to these migration streams in the first place? Identifying environmental characteristics related to this process is crucial for understanding how environmental change and migration may form recurrent feedback loop...

2012
Momoko Ishikawa Victor S. Kennedy Michael J. Paolisso Tetsuya Kusuda

A coastal fishery brings high productivity and economic profit while supporting cultural norms. However, it also causes environmental degradation and political conflicts, which sometimes collapse a fishery. With the current global shift from capture fisheries to aquaculture, appropriate management is required for social and environmental sustainability. To identify essential factors in coastal ...

ژورنال: بوم شناسی آبزیان 2014
Ghaffari, Roya , Mazaheri Assadi, Mahnaz , Soltani, Neda ,

In recent years, one of the most major world concerns is environmental pollutants derived from industrial and social performances. Unfortunately, in oil productive countries such as Iran, the substance is one of the most principle environmental pollutants. In this study, the effect of crude oil on some of physiological responses of unicellular alga Chlorella vulgaris such as the rate of photosy...

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