PNAS105(40),15346–15351(2008); DOI10.1073/pnas.0706805105. Original author-hosted paper biodynamics.ucsd.edu/wp-content/uploads/pubs/pdfs/Volfson08.pdf; Abstract and Figure1: growing E.coli in a microfluidic chemostat, cell alignment and expansion flow. Full primary byline Dmitri Volfson verified.