نتایج جستجو برای: aquatic sources

تعداد نتایج: 318950  

Journal: :Case studies in chemical and environmental engineering 2021

During the last decades, growth of concern towards different pollutants has been increasing due to population activities in large cities and great need for food production by agri-food industry. The effects observed specific locations have shown impact over environment air, soil water. Specifically, current pandemic COVID-19 brought into picture intensive use medical substances treat disease mi...

2012
Yasuhiro Tanaka Hideyuki Tamaki Hiroaki Matsuzawa Masahiro Nigaya Kazuhiro Mori Yoichi Kamagata

A number of molecular ecological studies have revealed complex and unique microbial communities in various terrestrial plant roots; however, little is known about the microbial communities of aquatic plant roots in spite of their potential use for water quality improvement in aquatic environments (e.g. floating treatment wetland system). Here, we report the microbial communities inhabiting the ...

Journal: :Environmental science & technology 2011
William M Lewis Wayne A Wurtsbaugh Hans W Paerl

Concentrations of phosphorus and nitrogen in surface waters are being regulated in the United States and European Union. Human activity has raised the concentrations of these nutrients, leading to eutrophication of inland waters, which causes nuisance growth of algae and other aquatic plants. Control of phosphorus often has had the highest priority because of its presumed leading role in limiti...

2014
Mia M. Bengtsson Karoline Wagner Nancy R. Burns Erik R. Herberg Wolfgang Wanek Louis A. Kaplan Tom J. Battin

The priming effect refers to quantitative changes in microbial decomposition of recalcitrant organic matter upon addition of labile organic matter and is a phenomenon that mainly has been reported and debated in soil science. Recently, priming effects have been indicated in aquatic ecosystems and have received attention due to the potential significance for ecosystem carbon budgets. Headwater s...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2002
W Battaglin J Fairchild

Society is becoming increasingly aware of the value of healthy aquatic ecosystems as well as the effects that man's activities have on those ecosystems. In recent years, many urban and industrial sources of contamination have been reduced or eliminated. The agricultural community also has worked towards reducing off-site movement of agricultural chemicals, but their use in farming is still grow...

Journal: :Ecotoxicology and environmental safety 2004
A Dennis Lemly

Selenium pollution is a worldwide phenomenon and is associated with a broad spectrum of human activities, ranging from the most basic agricultural practices to the most high-tech industrial processes. Consequently, selenium contamination of aquatic habitats can take place in urban, suburban, and rural settings alike--from mountains to plains, from deserts to rainforests, and from the Arctic to ...

2012
Viseth Srey Horm Ramona A. Gutiérrez John M. Nicholls Philippe Buchy

BACKGROUND Very little is known regarding the persistence of Highly Pathogenic Avian Influenza (HPAI) H5N1 viruses in aquatic environments in tropical countries, although environmental materials have been suggested to play a role as reservoirs and sources of transmission for H5N1 viruses. METHODOLOGY/PRINCIPAL FINDINGS The survival of HPAI H5N1 viruses in experimental aquatic biotopes (water,...

Journal: :تحقیقات نظام سلامت 0
مریم حاتم زاده کارشناسی، مرکز تحقیقات محیط زیست و گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران بی بی فاطمه نبوی کارشناسی ارشد، مرکز تحقیقات محیط زیست و گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران مهناز نیک آئین استاد، مرکز تحقیقات محیط زیست و گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران اکبر حسن زاده مربی، گروه آمار و اپیدمیولوژی، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

background : microbial monitoring of aquatic sources is essential in the correct management of these vital sources. multiple tube fermentation (mtf) technique is currently used for assessment of the microbial quality of water sources. however, today enzymatic assay has been presented as an alternative approach for detecting indicator bacteria. the purpose of this study was to compare enzymatic ...

Journal: :Environmental science & technology 2013
Radomir Schmidt Prapakorn Tantoyotai Sirine C Fakra Matthew A Marcus Soo In Yang Ingrid J Pickering Gary S Bañuelos Krassimira R Hristova John L Freeman

An engineered aquatic ecosystem was specifically designed to bioremediate selenium (Se), occurring as oxidized inorganic selenate from hypersalinized agricultural drainage water while producing brine shrimp enriched in organic Se and omega-3 and omega-6 fatty acids for use in value added nutraceutical food supplements. Selenate was successfully bioremediated by microalgal metabolism into organi...

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