An illustrative analysis of atypical gas production profiles obtained from in vitro digestibility studies using fecal inoculum
| Autor: | Mewa S. Dhanoa, Secundino López, Christopher D. Powell, Ruth Sanderson, Jennifer L. Ellis, Jo-Anne M. D. Murray, Anna Garber, Barbara A. Williams, James France |
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| Přispěvatelé: | Natural Sciences and Engineering Research Council of Canada, Canada Research Chairs, López, Secundino, López, Secundino [0000-0001-6267-683X] |
| Rok vydání: | 2021 |
| Předmět: |
lcsh:Veterinary medicine
General Veterinary Feedstuff evaluation Mitscherlich equation Monophasic Pattern 0402 animal and dairy science Numerical modeling Monotonic function 04 agricultural and veterinary sciences 040201 dairy & animal science Article Lag time Gas production technique lcsh:Zoology 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Production (economics) lcsh:SF600-1100 Animal Science and Zoology Atypical profiles Equivalent profile construction lcsh:QL1-991 Biological system Mathematics |
| Zdroj: | Animals Volume 11 Issue 4 Animals : an Open Access Journal from MDPI Animals, Vol 11, Iss 1069, p 1069 (2021) Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2076-2615 |
| Popis: | 14 páginas, 2 tablas, 6 figuras. Gas production profiles typically show a monotonically increasing monophasic pattern. However, atypical gas production profiles exist whereby at least two consecutive phases of gas production or additional extraneous features that distort the typical profile are present. Such profiles are more likely to occur with the use of a fecal inoculum and are much less well described. The presence of multiple phases or non-descript extraneous features makes it difficult to apply directly recommended modeling approaches such as standard response functions or classical growth functions. To overcome such difficulties, extensions of the Mitscherlich equation and a numerical modeling option also based on the Mitscherlich are explored. The numerical modeling option uses an estimate of relative rate obtained from the smoothed data profile and an estimate of maximum gas produced together with any lag time information drawn from the raw data to construct a simple Mitscherlich equation. In summary, this article illustrates the analysis of atypical gas production profiles obtained using a fecal inoculum and explores the methodology of numerical modeling to reconstruct equivalent typical growth-like trends. This research was funded in part by The Canada Research Chairs program, grant number 045867 (Natural Sciences and Engineering Research Council of Canada, Ottawa). |
| Databáze: | OpenAIRE |
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