نتایج جستجو برای: metal tolerance

تعداد نتایج: 322778  

Journal: :journal of rangeland science 2014
mahdieh ebrahimi fernando madrid díaz

festuca ovina l. is a hyperaccumulating plant which has aroused considerableinterest with respect to its possible use for phytoremediation of contaminated soils. thisstudy has been conducted to evaluate the potentials of f. ovina l. to serve as aphytoremediation plant in the cleaning up of cu in the polluted soils and to identifyextraction efficiency of ethylene diamine tetraacetic acid (edta) ...

Journal: :New Phytologist 2008

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1393

this study aimed at examining the effects of iranian efl learners’ anxiety, ambiguity tolerance, and gender on their preferences for corrective feedback (cf, henceforth). the effects were sought with regard to the necessity, frequency, and timing of cf, types of errors that need to be treated, types of cf, and choice of correctors. seventy-five iranian efl students, twenty-eight males and forty...

2017
Nishanta Rajakaruna Robert S. Boyd

2002
Elizabeth Pilon-Smits Marinus Pilon

An ideal plant for environmental cleanup can be envisioned as one with high biomass production, combined with superior capacity for pollutant tolerance, accumulation, and/or degradation, depending on the type of pollutant and the phytoremediation technology of choice. With the use of genetic engineering, it is feasible to manipulate a plant’s capacity to tolerate, accumulate, and/or metabolize ...

Introduction: Heavy metal contamination has necessitated a less expensive and non-destructive clean-up technique such as mycoremediation. This study aimed to isolate, identify, and evaluate the tolerance of fungi species in different concentrations of heavy metals for their potential use in bioremediation. Materials and Methods: Fungi were isolated by serial dilution and spread plate technique...

Journal: :Environmental pollution 2012
Lise C Fechner Catherine Gourlay-Francé Adeline Bourgeault Marie-Hélène Tusseau-Vuillemin

This study is a first attempt to investigate the impact of urban contamination on metal tolerance of heterotrophic river biofilms using a short-term test based on β-glucosidase activity. Tolerance levels to Cu, Cd, Zn, Ni and Pb were evaluated for biofilms collected at three sites along an urban gradient in the Seine river (France). Metallic pollution increased along the river, but concentratio...

Journal: :Applied and environmental microbiology 1996
T Pennanen A Frostegard H Fritze E Baath

The effects of long-term heavy metal deposition on microbial community structure and the level of bacterial community tolerance were studied along two different gradients in Scandinavian coniferous forest soils. One was near the Harjavalta smelter in Finland, and one was at Ronnskar in Sweden. Phospholipid fatty acid (PLFA) analysis revealed a gradual change in soil microbial communities along ...

Journal: :Applied and environmental microbiology 1996
M Diaz-Ravina E Baath

The development of metal tolerance in soil bacterial communities exposed to different heavy metals was examined under laboratory conditions. An agricultural soil amended with different Zn concentrations was studied most intensively, and measurements were made over a 28-month incubation period by means of the thymidine incorporation technique. Tolerance levels were not affected by metal concentr...

2018
Shalini Tiwari Charu Lata

Several anthropogenic activities including mining, modern agricultural practices, and industrialization have long-term detrimental effect on our environment. All these factors lead to increase in heavy metal concentration in soil, water, and air. Soil contamination with heavy metals cause several environmental problems and imparts toxic effect on plant as well as animals. In response to these a...

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