2002
DOI: 10.1016/s0013-4686(01)00899-4
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New evidences on the catalase mechanism of microbial corrosion

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Cited by 108 publications
(71 citation statements)
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“…facilitated the breakdown of passivity by excreting organic acids, thus resulting in an increase in the corrosion rates of metals. Busalmen et al [57] attributed the acceleration in the corrosion rate to the cathodic reduction by the catalase secreted by Pseudomonas. The Pseudomonas species isolated from the cooling tower also produce the catalase enzyme.…”
Section: Discussionmentioning
confidence: 99%
“…facilitated the breakdown of passivity by excreting organic acids, thus resulting in an increase in the corrosion rates of metals. Busalmen et al [57] attributed the acceleration in the corrosion rate to the cathodic reduction by the catalase secreted by Pseudomonas. The Pseudomonas species isolated from the cooling tower also produce the catalase enzyme.…”
Section: Discussionmentioning
confidence: 99%
“…Hence, it can be concluded that the formation of organic metallic complex may adsorb on the metal surface and reduce the anodic current. Busalman et al [10] suggested the extracellular appearance of bacterial metabolites with a catalytic effect on the oxygen reduction in the presence of bacteria. Based on the present study, it can be explained that the bacterial production of catalase (catalase positive) indicates the production of hydrogen peroxide, which encourages an autocatalytic mechanism by which the oxygen reduction current increases.…”
Section: Weight Loss Methodsmentioning
confidence: 99%
“…4ascon -Control system (4th day); 4asb -ACE2 inoculated system (4th day); 10ascon -Control system (10th day); 10asbac -ACE2 inoculated system (10th day) petroleum products. Moreover, it produces catalase that overcomes the toxic nature of hydrogen peroxide, breaking peroxide into water and oxygen [10]. During the respiratory process, oxygen is consumed by ACE2 and converted into water, wherein H + is utilized from the degraded product and electrons are supplied by cytochrome oxidase enzyme.…”
Section: Corrosion Mechanismmentioning
confidence: 99%
“…Catalase is an integral component of the bacterial cell response to oxidative stress, and together with superoxide dismutase and alkyl hydroperoxidases, it is thought to limit the accumulation of reactive oxygen species, such as hydrogen peroxide (H 2 O 2 ) by catalyzing its decomposition to water and oxygen [38]. An adapted schematic representation of the proposed catalase mechanism by Busalmen et al is shown in Figure 2 [39]. It is commonly accepted that oxygen reduction can proceed through a parallel mechanism involving the direct reduction via four electrons and a pathway where intermediate peroxide is formed.…”
Section: Enzymatic Activitymentioning
confidence: 99%