Approaches to Static Digestion Models

Abstract

It is not possible to look in detail at the wide range of static digestion methods that have been used to date. However, this section looks at some of the general approaches that have been used to look at the digestion of various nutrients and bioactives. I have focussed on the two main nutrients that undergo digestion in the upper GI tract, namely protein and lipid. In the case of protein, the research has largely been driven by the need to assess allergenic potential and the parameters used in such an assessment are given along with the justifi cation provided by the authors for their choice. For the lipid digestion, we have drawn heavily upon the work of Julian McClemments and colleagues who have been prolifi c in generating data in this area. The information provided highlights the fact that a wide range of methods are in use leading to a need for a single method, a role that can be fi lled by the Infogest method.

Dynamic gastric digestion of a commercial whey protein concentrate†

“…Nevertheless, these studies are associated with significant ethical constraints, and they are also expensive and time consuming. This had led to the development of different models of in vitro simulated gastrointestinal digestion …”

Increasing the potential of Cajuput leaf waste as cattle feed through fermentation pretreatment

“…It can be measured by the difference between the amount of food consumed and excreted in feces, which is considered absorbed in the digestive tract. According to Mackie et al (2015), the presence of microbial activity in the digestive tract greatly influences digestibility. Meanwhile, bacteria, fungi as well as protozoa are organisms that live in the rumen and appear several weeks after birth.…”