نتایج جستجو برای: step extractions

تعداد نتایج: 269647  

Journal: :international journal of environmental research 2013
a. de santiago-martín i. valverde-asenjo j.r. quintana c. gonzález-huecas a.l. lafuente

the potential risk of metal accumulation in periurban agricultural areas is a matter for concern.the climate characteristics and carbonate content of calcareous agricultural mediterranean soils typical inthese areas favour metal accumulation at the surface level; however there is also a risk of potential metalmobility. our study focuses on the soil properties affecting metal mobility in these s...

Journal: :international journal of environmental research 0
a. de santiago-martín departamento de edafología, facultad de farmacia, universidad complutense de madrid, plaza ramón y cajal s/n, 28040 madrid, spain i. valverde-asenjo departamento de edafología, facultad de farmacia, universidad complutense de madrid, plaza ramón y cajal s/n, 28040 madrid, spain j.r. quintana departamento de edafología, facultad de farmacia, universidad complutense de madrid, plaza ramón y cajal s/n, 28040 madrid, spain c. gonzález-huecas departamento de edafología, facultad de farmacia, universidad complutense de madrid, plaza ramón y cajal s/n, 28040 madrid, spain a.l. lafuente departamento de edafología, facultad de farmacia, universidad complutense de madrid, plaza ramón y cajal s/n, 28040 madrid, spain

the potential risk of metal accumulation in periurban agricultural areas is a matter for concern.the climate characteristics and carbonate content of calcareous agricultural mediterranean soils typical inthese areas favour metal accumulation at the surface level; however there is also a risk of potential metalmobility. our study focuses on the soil properties affecting metal mobility in these s...

2017
Mauricio R Dimitrov Annelies J Veraart Mattias de Hollander Hauke Smidt Johannes A van Veen Eiko E Kuramae

Currently, characterization of soil microbial communities relies heavily on the use of molecular approaches. Independently of the approach used, soil DNA extraction is a crucial step, and success of downstream procedures will depend on how well DNA extraction was performed. Often, studies describing and comparing soil microbial communities are based on a single DNA extraction, which may not lea...

2001
Tina Eliassi-Rad Jude W. Shavlik

We investigate applying theory refinement to the task of extracting information from text. In theory refinement, partial domain knowledge (which may be incorrect) is given to a supervised learner, which is guided by this prior knowledge, but can refine or even discard it during training. Our supervised learner is a “knowledge-based” neural network that initially contains “compiled” prior knowle...

Journal: :Waste management 2004
Carol Clausen

In this study, three possible improvements to a remediation process for chromated-copper-arsenate- (CCA) treated wood were evaluated. The process involves two steps: oxalic acid extraction of wood fiber followed by bacterial culture with Bacillus licheniformis CC01. The three potential improvements to the oxalic acid extraction step were (1) reusing oxalic acid for multiple extractions, (2) var...

Journal: :Chemosphere 2007
Min Jang Jung Sung Hwang Sang Il Choi

Sequential washing techniques using single or dual agents [sodium hydroxide (NaOH) and hydrochloric acid (HCl) solutions] were applied to arsenic-contaminated soils in an abandoned iron-ore mine area. We investigated the best remediation strategies to maximize arsenic removal efficiency for both soils and arsenic-containing washing solution through conducting a series of batch experiments. Base...

Journal: :British Dental Journal 2004

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