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. Author manuscript; available in PMC: 2012 Jul 16.
Published in final edited form as: J Lab Autom. 2012 Jan 24;17(2):96–103. doi: 10.1177/2211068211426694

Figure 3.

Figure 3

Lumen widths can be controlled by varying channel geometry, incubation time, and hydrogel composition. (A) Lumens were generated through 4.5-mg/mL collagen I hydrogels after a 4-min incubation in straight microchannels of varying widths (no constrictions). (B) Lumens were generated through 4.5-mg/mL collagen I hydrogels after a 4-min incubation in microchannels with constrictions of varying widths adjacent to the inlet and outlet ports. (C) Lumens were generated through 4.5-mg/mL collagen I hydrogels after a 4-min incubation in microchannels with varying inlet port diameters. (D) Lumens were generated through 4.5-mg/mL collagen I hydrogels with varying incubation times. (E) Lumens were generated through collagen I hydrogels with varying concentrations after a 4-min incubation.