In this paper, we simulated a double junction cell based on top CdS/Cu2ZnSnS4 cell, stacked bottom CdS/Cu2ZnSnSe4 cell. We started by studying the perfomance of solar copper zinc tin selenide Cu2ZnSnSe4 (CZTSe) absorber. Then, evaluated photovoltaic parameters tandem at optimized thickness sulfide Cu2ZnSnS4 (CZTS) absorber where and cells deliver same photocurrent density. achieved A maximum ef...

purpose: to evaluate corneal endothelial cells of donors who died from aluminum phosphide intoxication. methods: endothelial cell count and quality of eight corneas from four donors with aluminum phosphide intoxication were evaluated by slit lamp biomicroscopy and specular microscopy at the eye bank of i.r. iran. confocal scan examination was carried out only in one of the recipients. results: ...

Numerical modeling of polycrystalline thin-film solar cell serves as an imperative procedure to test the suitability of proposed physical clarification and to anticipate the effect of physical changes on cell performance. All in all, this must be conducted with only partial knowledge of input parameters. In this paper, we evaluated the numerical simulation of CdS/CIGS tandem multi junction sola...

The topographic organization of retinal ganglion cells was examined in the Florida manatee (Trichechus manatus latirostris) to assess ganglion cell size and distribution and to estimate retinal resolution. The ganglion cell layer of the manatee's retina was comprised primarily of large neurons with broad intercellular spaces. Cell sizes varied from 10 to 60 μm in diameter (mean 24.3 μm). The re...

The influence of a tubular structure PEMFC (proton exchange membrane fuel cell) with different flow patterns is investigated in this study. A complete 3D non-isothermal model constructed for square and circular PEMFCs, the distribution oxygen water concentration cathode channels, current density, power density cell net are studied. To end, four arrangements chordal (SC), peripheral (SP), (CC) (...

background and objective: lactic acid is widely used in the food, chemical and pharmaceutical industries. the major problems associated with lactic acid production are substrate and end-product inhibition, and by-product formation. membrane technology represents one of the most effective processes for lactic acid production. the aim of this work is to increase cell density and lactic acid produ...

Nickel is an ideal non-noble metal anode catalyst for direct urea fuel cell (DUFC) due to its high activity. However, there exists a large overpotential toward urea electrooxidation. Herein, NiCo/C bimetallic nanoparticles were prepared with various Co contents (0, 10, 20, 30 and 40 wt%) to improve the activity. The best Co ratio was 10% in the aspect of cell performance, with a maximum power d...

in order to evaluate the variation of some of quantitative and qualitative traits of different varieties of linseed under different plant densities, an experiment was conducted in the research station of the faculty of agriculture in shahrekord univerity in 2009. this experiment was arranged as factorial in rcbd design with three replications. four linseeds originated from australia, canada, fr...