In the present study, cadmium (Cd) accumulation capabilities of aquatic macrophytes Ceratophyllum demersum, Bacopa monnieri and Rotala rotundifolia were determined after treating both individual and triple macrophytes. The macrophytes were treated with Cd at 0, 0.1, 1 and 10 mg/L concentrations in a controlled chamber for 12-days. Cadmium accumulations increased with increasing Cd concentratio...

W e present here a QT database designed j b r evaluation of algorithms that detect waveform boundaries in the EGG. T h e dataabase consists of 105 fifteen-minute excerpts of twochannel ECG Holter recordings, chosen to include a broad variety of QRS and STT morphologies. Waveform bounda,ries f o r a subset of beats in, these recordings have been manually determined by expert annotators using a n...

This paper introduces and analyzes problems and issues in the design and use of cognitive tools in open, user-centered learning environments. It introduces a classification scheme for tool functions, and showcases several tools in a current educational hypermedia research and development effort. Information-seeking, information-presentation, knowledgeorganization, knowledge-integration, and kno...

In order to investigate the effect of Cd and Zn on uptake, concentration and the translocation factor of the Cd and Zn in the rice plant, a factorial experiment was conducted with four factors including two rice cultivars of Vandana and Hashemi, two waterlogged and non-waterlogged conditions and three levels of Zn and Cd (0, 5 and 10 mg kg-1 soil). The experiment was carried out in a randomized...

background: the aim of the present study was to find the effects of cadmium (cd) on japanese quail on the role of an animal model in order to understand the toxicity of cd in creatures presented, within the environment. methods: one hundred 30-day-old male japanese quails were equally divided into the control group and cd group. the control group received no cd while the cd group was given form...

background and objectives: the mobility, bioavailability and environmental fate of heavy metal ions in soil are controlled by sorption onto soil minerals and solid organic matter. the sorption is strongly affected by the presence of various low-molecular-weight organic acids. the main objective of this study was to investigate the effects of oxalic acid on sorption of cd on clay fraction of a s...

interactions between cd, pillared clays and chalcogenedies have been studied using nanomineralogical experiments. xrd, dsc and chemical analysis. the synchrotron-based x-ray absorption spectroscopy (xas) was applied to characterize the reaction phases. the mean bond lengths between, cd-s, fe-s, sb-s, cd-cd (in chalcogenedies), al-cd, cd-ti, and fe-cd, (in pillared clays) were determined by xas ...