Kinetic studies of the partially purified molybdenum-reducing enzyme from Bacillus pumilus strain lbna

Abo-Shakeer, Lubna Kamil Abdulhussein; Rahman, Mohd Fadhil; Yakasai, Mohd Hafeez; Bakar, Norhaliza Abu; Othman, Ahmad Razi; Syed, Mohd Arif; Abdullah, Norhafizah; Shukor, Mohd Yunus

doi:10.54987/bstr.v5i1.354

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A concentration of copper at 1.0 mg/L leads to a complete cessation of reduction. This was also observed in many Mo-reduction works [32][33][34][35][36][37][38][39][40][41].…”

Section: Resultssupporting

confidence: 73%

Modelling the Effect of Copper on the Mo-reduction Rate of the Antarctic Bacterium Pseudomonas sp. strain DRY1

Rahman¹,

Ahmad²,

MacCormack³

et al. 2017

J Environ Microbiol Toxicol

Self Cite

View full text Add to dashboard Cite

Molybdenum reduction by the Antarctic bacterium Pseudomonas sp. strain DRY1 is strongly inhibited by copper. Mo reduction by this bacterium at 10 mM sodium molybdate shows a sigmoidal pattern with lag periods ranging from 7 to 10 h at various concentrations of copper. As the concentration of copper was increased, the overall Mo reduction rate was inhibited with 1.2 mg/L causing the cessation of Mo reduction rate. The modified Gompertz model was utilized to obtain Mo reduction rates at different concentrations of copper. The Mo reduction rates obtained from the modified Gompertz model was then modelled according to the modified Han-Levenspiel, Wang, Liu, modified Andrews and the Amor models. Out of the five models, only Wang, modified Han-Levenspiel and the Liu models were able to fit the curve, whilst the modified Andrews and Amor models were unable to fit the curves. Both the Wang and modified Han-Levenspiel models show acceptable fitting while the Liu model shows poor fitting. Results of the statistical analysis showed that the modified Han-Levenspiel model was the best model based on the lowest values for RMSE and AICc, highest adjusted correlation coefficient (adR2) and values of AF and BF closest to unity. The parameters obtained from the modified Han Levenspiel model, which were Ccrit, ïmax and m which represent critical heavy metal ion concentration (mg/l), maximum reduction rate (nmole Mo blue/h) and empirical constant values were 0.225 (95%, confidence interval from 0.198 to 0.251), 1.200 (95%, confidence interval from 1.180 to 1.220) and 0.443 (95%, confidence interval from 0.261 to 0.626). The modified Han-Levenspiel accurately predicted the critical copper concentration that completely inhibited molybdenum reduction rate in this bacterium.

show abstract

“…A concentration of copper at 1.0 mg/L leads to a complete cessation of reduction. This was also observed in many Mo-reduction works [32][33][34][35][36][37][38][39][40][41].…”

Section: Resultssupporting

confidence: 73%

Modelling the Effect of Copper on the Mo-reduction Rate of the Antarctic Bacterium Pseudomonas sp. strain DRY1

Rahman¹,

Ahmad²,

MacCormack³

et al. 2017

J Environ Microbiol Toxicol

Self Cite

View full text Add to dashboard Cite

show abstract

Bioreduction potential of Providencia sp. and microbial consortium for hexavalent molybdenum: Isolation, identification, characterization, and optimization by response surface methodology

Suleiman,

Babandi,

Babagana

et al. 2024

Desalination and Water Treatment

View full text Add to dashboard Cite

Microbiological Reduction of Molybdenum to Molybdenum Blue as a Sustainable Remediation Tool for Molybdenum: A Comprehensive Review

Yakasai

Rahman

Manogaran

et al. 2021

IJERPH

View full text Add to dashboard Cite

Molybdenum (Mo) microbial bioreduction is a phenomenon that is beginning to be recognized globally as a tool for the remediation of molybdenum toxicity. Molybdenum toxicity continues to be demonstrated in many animal models of spermatogenesis and oogenesis, particularly those of ruminants. The phenomenon has been reported for more than 100 years without a clear understanding of the reduction mechanism, indicating a clear gap in the scientific knowledge. This knowledge is not just fundamentally important—it is specifically important in applications for bioremediation measures and the sustainable recovery of metal from industrial or mine effluent. To date, about 52 molybdenum-reducing bacteria have been isolated globally. An increasing number of reports have also been published regarding the assimilation of other xenobiotics. This phenomenon is likely to be observed in current and future events in which the remediation of xenobiotics requires microorganisms capable of degrading or transforming multi-xenobiotics. This review aimed to comprehensively catalogue all of the characterizations of molybdenum-reducing microorganisms to date and identify future opportunities and improvements.

show abstract

Kinetic studies of the partially purified molybdenum-reducing enzyme from Bacillus pumilus strain lbna

Cited by 3 publications

References 0 publications

Modelling the Effect of Copper on the Mo-reduction Rate of the Antarctic Bacterium Pseudomonas sp. strain DRY1

Modelling the Effect of Copper on the Mo-reduction Rate of the Antarctic Bacterium Pseudomonas sp. strain DRY1

Bioreduction potential of Providencia sp. and microbial consortium for hexavalent molybdenum: Isolation, identification, characterization, and optimization by response surface methodology

Microbiological Reduction of Molybdenum to Molybdenum Blue as a Sustainable Remediation Tool for Molybdenum: A Comprehensive Review

Contact Info

Product

Resources

About