a risk assessment study was conducted to predict the expected hazardous influence on the ecosystem resulted from urbanization and industrialization activities at helwan area, egypt. to achieve these goals, soils, plants and water samples were collected from helwan area, and their total concentrations of inorganic contaminants (cd, cr, co, cu, fe, mn, ni, pb, and zn) and organic pollutants; such...

Linear as well as nonlinear optical responses of slab waveguides with one-dimensional periodic structures at the scale of optical wavelengths are reviewed. By inserting an inorganic-organic hybrid semiconductor into the periodic structure, we demonstrated strong modification of optical response. The strong coupling (polariton) effect, directional photoluminescence, exciton super-radiance and tr...

This special issue of Nanoscale Research Letters contains scientific contributions presented at the Symposium D "Multidimensional Electrical and Chemical Characterization at the Nanometer-scale of Organic and Inorganic Semiconductors" of the E-MRS Fall Meeting 2010, which was held in Warsaw, Poland from 13th to 17th September, 2010.

The electronic transfer (eT) at bio-interfaces has been achieved by orientating 2D inorganic slabs in a regular arrangement with the slab ab-planes vertical to the electrode substrate. The eT rate is effectively promoted by tuning the nano-micro scale structures of perpendicular LDH arrays.

Salvinia exhibit capacity for removing contaminants such as heavy metals, inorganic nutrients, explosives from wastewaters. Properties such as high productivity, high sorption capacity and high metal removal potential establish Salvinia as an aquatic fern with immense potential for use in phytoremediation technologies. Realizing capabilities of Salvinia, its role for mass scale use in phytoreme...

Inorganic nanoparticles usually provide novel and unique physical properties as their size approaches nanometer scale dimensions. The unique physical and optical properties of nanoparticles may lead to applications in a variety of areas, including biomedical detection. Therefore, current research is now increasingly focused on the use of the high surface-to-volume ratios of nanoparticles to fab...

Increasing demand for renewable fuels has researchers investigating the feasibility of alternative feedstocks, such as microalgae. Inherent advantages include high potential yield, use of non-arable land and integration with waste streams. The nutrient requirements of a large-scale microalgae production system will require the coupling of cultivation systems with industrial waste resources, suc...

More recently, the concept of integrated forest biorefinery (IFBR) has received much attention as a promising solution for the struggling forest industry in North America and Europe to overcome its difficult financial period and competes globally. This new business paradigm offers a broad range of potentially attractive products, from bioenergy to value-added green organic chemicals in addition...

Dissolved inorganic N (DIN) and soluble reactive P (SRP) have been used by some to indicate the trophic status of waters, and concentration ratios (DIN:SRP) to indicate nutrient deficiency. The utility of such measurements should be questioned, particularly based on well-known problems associated with determination of the concentration of SRP, which is commonly assumed to represent PO4. Another...

the purpose of this research was to design a semi-industrial culture medium to obtain the maximum biomass production from bacterium bacillus subtilis utb96. in the first step, in order to reduce the cost of culture medium components, commercial products and industrial by products including, sugar beet molasses, sugar cane molasses, potato waste water and milk serum as carbon sources and corn st...