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can be tailored to match gas flow patterns and gradients. Further refinements can be achieved by varying the print pattern across the cell, and by using multiple layers to control both the depth and structure of the layers within the pattern. The advantages of this gas diffusion electrode are higher performance and lower cost.
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As the grain size in nanocrystalline materials is made ever smaller, the questions of what the smallest grain size could be and what factors influence it become highly relevant to material synthesis and application. Using extensive atomistic simulation and theoretical analysis, this paper shows that
## Abstract The effect of ferrobacteria and thiobacteria on the leaching of waste uranium materials from which 70β80% of uranium was previously leached by classical chemical hydrometallurgical procedure has been investigated. The bacteria used are found in the ore and the mine water of Zletovska Ri