Test for the Presence of Autocorrelation in the Buchanan model used in the Fitting of the Growth of the Catechol-degrading Candida parapsilopsis

Authors

  • M.S. Shukor Snoc International Sdn Bhd, Lot 343, Jalan 7/16 Kawasan Perindustrian Nilai 7, Inland Port, 71800, Negeri Sembilan, Malaysia.
  • M.Y. Shukor Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, UPM 43400 Serdang, Selangor, Malaysia

DOI:

https://doi.org/10.54987/jemat.v2i2.167

Keywords:

Buchanan three-phase model; Catechol; Candida parapsilopsis; ordinary least squares method; autocorrelation

Abstract

Catechol is a metabolic byproduct of phenol degradation by microbes. Its toxicity to human, mammals, insects and fishes has been long studied and its presence in the environment at toxic concentrations has been demonstrated. Fortunately there are microbes that could degrade catechol and can be used in bioremediation works. The growth of these microbes usually exhibit sigmoidal pattern due to the toxicity of the substrate. Previously, using the least square method in nonlinear regression, we report that the Buchanan three-phase model is the best model in fitting the growth of the yeast Candida parapsilopsis on this substrate. The ordinary least squares method relies heavily on several important assumptions such as residuals conformation to normal distribution, does not have outliers, is truly random, of equal variance (homoscedastic) and does not show autocorrelation. If all of these assumptions are satisfied, the test is said to be robust. In this work we perform statistical diagnosis test to test for the presence of autocorrelation as the growth model is time-dependent and many time-dependent curves shows evidence of autocorrelation. 

Downloads

Published

30.12.2014

How to Cite

Shukor, M., & Shukor, M. (2014). Test for the Presence of Autocorrelation in the Buchanan model used in the Fitting of the Growth of the Catechol-degrading Candida parapsilopsis. Journal of Environmental Microbiology and Toxicology, 2(2), 45–46. https://doi.org/10.54987/jemat.v2i2.167

Issue

Vol. 2 No. 2 (2014)

Section

Articles

License

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).