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00:47 Jul 24, 2015 |
English to Spanish translations [PRO] Science - Biology (-tech,-chem,micro-) / single reservoir diffusion gradient plate | |||||||
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| Selected response from: Marcelo Viera Uruguay Local time: 23:09 | ||||||
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4 | placa de reservorio único para gradiente de difusión |
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Discussion entries: 2 | |
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placa de reservorio único para gradiente de difusión Explanation: WHY IS DIFFUSION AN IMPORTANT PROCESS IN BIOFILMS? When microorganisms are grown in planktonic culture, diffusion is usually of little consequence. There are two reasons for this. The first reason is that planktonic cultures are generally agitated, and the resulting fluid flow transports solutes rapidly, resulting in a well-mixed system. Transport that occurs as a solute is carried by the bulk flow of a fluid (convection) is generally much faster than the transport resulting from random molecular motion (diffusion). Of course, there is no net convective flow of fluid into or out of the microbial cell. At some point close to the cell, diffusion becomes critical for moving the solute toward or away from the cell surface. The reason that diffusion does not limit this step is that the diffusion distance is small and diffusion is rapid over such short distances. http://jb.asm.org/content/185/5/1485 http://aem.asm.org/content/59/8/2388.full.pd Reference: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC182296/ |
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