نتایج جستجو برای: protection of natural resources

تعداد نتایج: 21227798  

M Mehrabani P Khazaeli

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...

Journal: :Proceedings of the International conference “InterCarto/InterGIS” 2015

2008
E. Eleftheriadou Y. Mylopoulos

The urgent demand of integrated water resources management has drawn attention to the issue of transnational water bodies that comprise exploitable resources for two or more countries. It is estimated that 50% of the global surface is lying on transboundary catchments and this percentage is continually increasing due to the creation of new nations, while around 40% of the earth’s population res...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

Journal: :Ambio 2011
Lixin Guan Ge Sun Shixiong Cao

Ecosystem restoration efforts have become a booming business in China. Billions of dollars are being spent annually to restore polluted waterways and ecosystems that have been degraded, fragmented, or paved over (Fu et al. 2007; Wang et al. 2007). However, China’s environmental sustainability index remains among the lowest in the world (World Bank 2009; Liu 2010). For all the money spent, there...

ژورنال: ابن سینا 2021
Azarmi, Somayeh, Baniyaghoobi, Faeze, Hosseini-Shokouh, Seyyed-Javad , Sharififar, Simintaj,

Background: Iran is one of the most earthquake-prone countries in the world. The aim of this study was to investigate the prevalence of infectious and contagious diseases and to manage and control them after the crisis. Materials and methods: This was a review study. To do this, researchers used keywords: the crisis, the disaster, infectious diseases, contagious disease, the earthquake, ...

Journal: :The Science of the total environment 2015
Rolf Altenburger Selim Ait-Aissa Philipp Antczak Thomas Backhaus Damià Barceló Thomas-Benjamin Seiler Francois Brion Wibke Busch Kevin Chipman Miren López de Alda Gisela de Aragão Umbuzeiro Beate I Escher Francesco Falciani Michael Faust Andreas Focks Klara Hilscherova Juliane Hollender Henner Hollert Felix Jäger Annika Jahnke Andreas Kortenkamp Martin Krauss Gregory F Lemkine John Munthe Steffen Neumann Emma L Schymanski Mark Scrimshaw Helmut Segner Jaroslav Slobodnik Foppe Smedes Subramaniam Kughathas Ivana Teodorovic Andrew J Tindall Knut Erik Tollefsen Karl-Heinz Walz Tim D Williams Paul J Van den Brink Jos van Gils Branislav Vrana Xiaowei Zhang Werner Brack

Environmental quality monitoring of water resources is challenged with providing the basis for safeguarding the environment against adverse biological effects of anthropogenic chemical contamination from diffuse and point sources. While current regulatory efforts focus on monitoring and assessing a few legacy chemicals, many more anthropogenic chemicals can be detected simultaneously in our aqu...

Journal: :The American economic review 2012
Joshua Graff Zivin Matthew Neidell

As one of the primary factors of production, labor is an essential element in every nation’s economy. Investing in human capital is widely viewed as a key to sustaining increases in labor productivity and economic growth. While health is increasingly seen as an important part of human capital, environmental protection, which typically promotes health, has not been viewed through this lens. Inde...

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