خيارات البحث
النتائج 161 - 164 من 164
Empowering farming communities in Northern Ghana with strategic innovations and productive resources in dryland farming: Technical Progress Report of Project 6 of the Challenge Program on Water and Food, 2004-2005
2012
Asante, Stephen K. | Padi, Francis K
Situation analysis for polder 3. [Project report prepared by IWMI for the CGIAR Challenge Program on Water and Food (CPWF) under the project "Increasing the Resilinece of Agricultural and Aquacultural Systems in the Coastal Areas of the Ganges Delta: Project G3 - Water Governance and Community Based Management"].
2012
Silva, Sanjiv de
Preparation and characterization of magnetic nanocomposite of Schiff base/silica/magnetite as a preconcentration phase for the trace determination of heavy metal ions in water, food and biological samples using atomic absorption spectrometry النص الكامل
2012
Bagheri, Hasan | Afkhami, Abbas | Saber-Tehrani, Mohammad | Khoshsafar, Hosein
A versatile and robust solid phase with both magnetic property and a very high adsorption capacity is presented on the basis of modification of iron oxide-silica magnetic particles with a newly synthesized Schiff base (Fe₃O₄/SiO₂/L). The structure of the resulting product was confirmed by Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD) spectrometry and transmission electron microscopy (TEM). We developed an efficient and cost-effective method for the preconcentration of trace amounts of Pb(II), Cd(II) and Cu(II) in environmental and biological samples using this novel magnetic solid phase. Prepared magnetic solid phase is an ideal support because it has a large surface area, good selectivity and can be easily retrieved from large volumes of aqueous solutions. The possible parameters affecting the enrichment were optimized. Under the optimal conditions, the method detection limit was 0.14, 0.19 and 0.12μgL⁻¹ for Pb(II), Cd(II) and Cu(II) ions, respectively. The established method has been successfully applied to analyze real samples, and satisfactory results were obtained. All these indicated that this magnetic phase had a great potential in environmental and biological fields.
اظهر المزيد [+] اقل [-]Structural vulnerability to climate change in Bangladesh: a literature review. [Project report prepared by IWMI for the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) under the project "Water-related Interventions to Reduce Vulnerability to Climate Change: Do they Address the Structural Causes of Gendered Vulnerability in the IGP [Indo Gangetic Plains]"].
2012
Silva, Sanjiv de
