نتایج جستجو برای: environmental degradation

تعداد نتایج: 510880  

2017
Sagarika Kumar Subinoy Roy Rajesh Gupta

Standard environmental tests have been developed for photovoltaic (PV) modules to assess the reliability of their performance in a short period of time. These tests generate different modes of degradation by combination of environmental stresses. There is a need to differentiate between the standard tests on the basis of severity. This helps to understand the individual and combined degradation...

2005
Ann E. Biddlecom Alan Guttmacher William G. Axinn Jennifer S. Barber

This study investigates the relationship between environmental degradation and men and women’s family size preferences and subsequent reproductive behaviors in Nepal. We draw on unique environmental data at the local level, household and individual-level survey data and individuals’ reproductive behavior over a 3 year time period in Western Chitwan Valley, Nepal. Results from Ordinary Least Squ...

2005
Rafael Reuveny

The Intergovernmental Panel on Climate Change predicts that climate change will induce considerable environmental degradation globally during this century. What are the implications of this prediction for the patterns of population migration and political conflict? Climate change is an evolving environmental phenomenon whose effects are not yet fully manifested. This paper strives to gain insig...

2014
Rishikesh Pandey

This paper discusses the environmental myths and narratives prevailing in Nepal in reference to the population growth and soil erosion. Soil erosion is taken as primary element of environmental degradation by the theory of the Himalayan Environmental Degradation (HED). Many myths and narratives were generated by the vested interest groups to develop the HED. Population growth and over exploitat...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1392

a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

2016
Kai Yue Fuzhong Wu Wanqin Yang Chuan Zhang Yan Peng Bo Tan Zhenfeng Xu Chunping Huang

To investigate the dynamics and relative drivers of cellulose degradation during litter decomposition, a field experiment was conducted in three individual ecosystems (i.e., forest floor, stream, and riparian zone) of an alpine forest meta-ecosystem on the eastern Tibetan Plateau. Four litter species (i.e., willow: Salix paraplesia, azalea: Rhododendron lapponicum, cypress: Sabina saltuaria, an...

2010
Sujith Ravi David D. Breshears Travis E. Huxman Paolo D'Odorico

a r t i c l e i n f o Land degradation in drylands is one of the major environmental issues of the 21st century particularly due to its impact on world food security and environmental quality. Climate change, shifts in vegetation composition, accelerated soil erosion processes, and disturbances have rendered these landscapes susceptible to rapid degradation that has important feedbacks on regio...

Journal: :محیط شناسی 0
طیبه اکبری راد دانشگاه آزاد اسلامی واحد تهران شمال، استادیار گروه الهیات و معارف اسلامی، رشته علوم قرآن و حدیث

environmental degradation all over the world is one of the three major concerns of the human being. depletion of fresh water sources on earth, ozone layer depletion, soil degradation, intensive farming, climate change and temperature increase, biodiversity loss, population increase, poverty, pollution, extinction of rare species, biological extinction and endangered species are the main environ...

2017
R. L. Yale M. Sapp C. J. Sinclair J. W. B. Moir

Accelerated degradation is the increased breakdown of a pesticide upon its repeated application, which has consequences for the environmental fate of pesticides. The herbicide atrazine was repeatedly applied to soils previously untreated with s-triazines for >5 years. A single application of atrazine, at an agriculturally relevant concentration, was sufficient to induce its rapid dissipation. S...

2009

Currently a large scale infrastructural mall development of 48000 m is being constructed adjacent to the Mooi River in the central business district of the city of Potchefstroom. This development is facing significant environmental and social challenges due to the highly sensitive environment in which the development is being constructed. In projects like the Mooirivier Mall Development the act...

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