Jumars, P. A. University of Washington, jumars@ocean.washington.edu
Mayer, L. W. University of Maine, lmayer@maine.maine.edu

Chemical reactor models of animal digestion have predicted feeding rates and release rates of organic matter from incompletely efficient hydrolysis and absorption of food. Assumptions underlying early predictions were that guts performed as ideal plug-flow reactors without either substantial axial mixing or axial differentiation in function. We have relaxed these assumptions through simulation models based on series of stirred-tank reactors that can accommodate any degree of axial mixing. Further, these new models allow prediction of axial differentiation in hydrolytic and absorptive function. They predict that ingestion rate and location of absorptive sites should interact, with faster processing leading to more posteriorward concentration of absorptive sites. The new models also allow differential flow of particules and fluids within digesta, as revealed from ongoing observations. They promise new insights into the linkages between gut structure and function.
Day: Wednesday, Feb. 3
Time: 08:30 - 08:45am
Location: Hilton of Santa Fe
Code: SS21WE0830H