Article published the September 6, 2021
INTRODUCTION Variability in the nutritional value of feed ingredients for poultry (and indeed other livestock species) has been widely reported over several decades and has been the impetus behind a sustained body of research work. For example, Sibbald and Slinger (1962), Mollah et al. (1983), and Leeson et al. (1993) reported variation in the apparent metabolizable energy (AME) content of corn ( ...
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Article published the November 4, 2020
1. Introduction Similar to mammals, the liver in birds is involved in an array of metabolic and homeostatic functions and considered as a biochemical factory responsible for most of the synthesis, metabolism, excretion, and detoxification processes. It plays an important role in digestion and metabolism, regulating the production, storage, and release of lipids, carbohydrates and proteins [1]. Th ...
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Participation in Forum on May 18, 2020
A couple of quick remarks on this topic. When phytic acid is hydrolysed by phytase and the mucosal phosphatases in the intestine the only two direct products of this are myo-inositol and phosphate. We have measured the appearance of both of these in multiple experiments and this is clear evidence of phytase efficacy and its compatibility with endogenous phosphatases in the intestine. All additiona ...
Aaron Cowieson likes the comment:
Aaron Cowieson Ha ha! :-) He did at least put in a reference to you.
Participation in Forum on May 11, 2020
Ali Afsar I recognize quite a bit of that text...
This member gave a presentation on January 27, 2020
At the following event:
IPPE - International Production & Processing Expo 2020
Participation in Forum on November 4, 2019
For sure enzyme responses are non-linear but in the range, we test them in animal nutrition they occasionally appear linear. I think it is crucial to also examine available/reactive substrate concentration when interpreting enzyme response. Systems may be saturated with the substrate in which case enzyme responses may be exaggerated across a wide range of inclusion concentrations, or they may be s ...
Participation in Forum on October 17, 2019
Park W. Waldroup I think FTU, in a generic sense, is largely meaningless from a biological effect perspective but provides a moderately useful index against which phytases can be traded and registered with the appropriate authorities. From the perspective of the animal though, FTU (which is typically measured with substrate, cation, pH etc conditions of limited practical relevance), is poorly corr ...
Participation in Forum on October 31, 2018
Hi Meg, all useful comments and I agree with most of your points regarding the characteristics of phytases that promote bioefficacy. However, I don't think the title of this video is reflected in the comments that you have made. I've noticed this with several other Engormix videos also. The title should reflect the content of the video. The title here was - 'The key to using phytase in effecti ...
Participation in Forum on September 20, 2018
Henk Ghesquiere It is theoretically possible to overdose xylanase but in practice, I think this is unlikely to be a significant issue with most xylanases that are available commercially. Firstly, most commercial xylanases are endo-acting and so do not produce appreciable quantities of free xylose or arabinose (which are known to have a net negative energy value for animals as they are readily abso ...
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Location:Orkney, Orkney, United Kingdom
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