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The passage of food through animal stomachs: a chemical reactor engineering approach

Conference Paper


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Abstract


  • In many circumstances it is useful to know the mean residence time of food substrates within the body following digestion. For instance, such information is crucial to estimate the extent to which dietary components are fermented inside animal stomaches. The mean residence time can be estimated by measuring the rate at which non-absorable markers, mixed as a supplement into an animals food, are deposited in the animals faeces. The experimental data are analysed with the use of an appropriate mathematical model. We analyse multicompartmental models for the flow of digesta along the gastrointestinal tract of animals. The problem can be treated as a sequence of `tanks' in series. Of interest is the fact that the volume of the tanks is not necessarily constant. For example, following digestion of food, secretion of pancreatic juices may occur; diluting the tracer. Thus the problem can be treated as a series of semi-batch reactors in series. This problem is a good illustration of the application of the methods of chemical reactor engineering to a situation that, at first sight, does not appear to be a chemical engineering problem.

Authors


  •   Nelson, Mark I.
  •   Sidhu, Harvinder S. (external author)
  •   Chen, Xiao Dong (external author)

Publication Date


  • 2008

Citation


  • Nelson, M. I., Sidhu, H. S. & Chen, X. (2008). The passage of food through animal stomachs: a chemical reactor engineering approach. Australasian Conference on Chemical Engineering (pp. 534-542). Barton, ACT: Engineers Australia.

Scopus Eid


  • 2-s2.0-78650306662

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=10003&context=infopapers

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/2667

Start Page


  • 534

End Page


  • 542

Place Of Publication


  • http://search.informit.com.au/documentSummary;dn=590360782367840;res=IELENG

Abstract


  • In many circumstances it is useful to know the mean residence time of food substrates within the body following digestion. For instance, such information is crucial to estimate the extent to which dietary components are fermented inside animal stomaches. The mean residence time can be estimated by measuring the rate at which non-absorable markers, mixed as a supplement into an animals food, are deposited in the animals faeces. The experimental data are analysed with the use of an appropriate mathematical model. We analyse multicompartmental models for the flow of digesta along the gastrointestinal tract of animals. The problem can be treated as a sequence of `tanks' in series. Of interest is the fact that the volume of the tanks is not necessarily constant. For example, following digestion of food, secretion of pancreatic juices may occur; diluting the tracer. Thus the problem can be treated as a series of semi-batch reactors in series. This problem is a good illustration of the application of the methods of chemical reactor engineering to a situation that, at first sight, does not appear to be a chemical engineering problem.

Authors


  •   Nelson, Mark I.
  •   Sidhu, Harvinder S. (external author)
  •   Chen, Xiao Dong (external author)

Publication Date


  • 2008

Citation


  • Nelson, M. I., Sidhu, H. S. & Chen, X. (2008). The passage of food through animal stomachs: a chemical reactor engineering approach. Australasian Conference on Chemical Engineering (pp. 534-542). Barton, ACT: Engineers Australia.

Scopus Eid


  • 2-s2.0-78650306662

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=10003&context=infopapers

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/2667

Start Page


  • 534

End Page


  • 542

Place Of Publication


  • http://search.informit.com.au/documentSummary;dn=590360782367840;res=IELENG