Fundamentals of Biofilm Research, Second Edition by Zbigniew Lewandowski

Fundamentals of Biofilm Research, Second Edition by Zbigniew Lewandowski

By Zbigniew Lewandowski

The six years that experience handed because the ebook of the 1st variation have introduced major advances in either biofilm learn and biofilm engineering, that have matured to the level that biofilm-based applied sciences at the moment are being designed and carried out. consequently, many chapters were up to date and multiplied with the addition of sections reflecting adjustments within the established order in biofilm examine and engineering. Emphasizing method research, engineering structures, biofilm purposes, and mathematical modeling, Fundamentals of Biofilm examine, moment variation provides the instruments to unify and enhance biofilm study as a whole.

Retaining the pursuits of the 1st version, this moment version serves as:

  • A compendium of data approximately biofilms and biofilm processes
  • A set of directions for designing and engaging in biofilm experiments
  • A set of directions for making and utilizing quite a few instruments worthy in biofilm research
  • A set of computational techniques invaluable in studying result of biofilm research
  • A set of directions for utilizing the version of stratified biofilms for info interpretation, research, and biofilm task prediction

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Additional info for Fundamentals of Biofilm Research, Second Edition

Example text

15, is not adequate. 16. To image the 3-D distribution of the oxygen concentration in a biofilm, we use measurements based on the concept of stratified biofilms. In this approach, a biofilm is subdivided into a finite number of discrete, uniform, and continuous layers. This procedure is explained in detail along with experimental measurements in Chapter 9. 4 Characterizing distribution of effective diffusivity and biofilm density The most striking differences between the models of homogeneous and heterogeneous biofilms are related to the mechanisms of mass transport in the two systems: h ­ eterogeneous biofilms are porous, water moves within the space occupied by them, and their mass transport rates vary from one place to another.

Water can move freely within the network of these channels. It is believed that microorganisms in biofilms are organized as communities. It is further hypothesized that these communities are assembled following a master plan, so that the cells of one species associate with those of another species for mutual physiological benefits. As time passes, the discrete microcolonies of microorganisms deposited on the surface grow in size, join, and form heterogeneous layers of microorganisms embedded in the polymer matrix covering the entire surface.

The fluorescent beads were used to imitate bacteria having a growth rate equal to zero, and they were expected to be pushed away by growing biofilm microorganisms. After the experiment was terminated, the biofilm was sectioned and the beads were recovered. Surprisingly, many of them were found at the bottom of the biofilm, near the surface supporting biofilm growth. This contradicted one of the assumptions of the model: if the biofilm was a continuous gelatinous layer, as was stipulated by the model, then how did these beads get to the bottom of the biofilm?

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