Electrochemical behavior of 304L stainless steel in high saline and sulphate solutions containing alga Dunaliella Salina and β-carotene

Heakal, F. El-Taib; Hefny, M. M.; El-Tawab, A.M. Abd

doi:10.1016/j.jallcom.2009.11.028

Cited by 20 publications

(4 citation statements)

References 29 publications

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“…This value is consistent with previously reported OCP value in the same aqueous sodium chloride medium. A similar value of − 372 mV for the OCP was reported by Heakal et al [34]. The linear polarization resistance is another indicator to describe the corrosion resistance of a metal.…”

Section: Corrosion Under Open-circuit Conditionsupporting

confidence: 83%

Pitting behavior of friction stir repair-welded 304L stainless steel in 3.5% NaCl solution at room temperature: role of grain and defect structures

et al. 2020

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Section: Corrosion Under Open-circuit Conditionsupporting

confidence: 83%

Pitting behavior of friction stir repair-welded 304L stainless steel in 3.5% NaCl solution at room temperature: role of grain and defect structures

et al. 2020

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“…Heakal et al [12] and Hefny et al [13] studied the action of Dunaliella salina on the corrosion of titanium and 304L in a saline solution and in sulphate solution they concluded that this stock has an anti-corrosive capacity due to the synthesis of the -carotene.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical behavior of the 316L steel type in a marine culture of microalgae (Porphyridium purpureum) under the 12/12 h photoperiod and effect of different working electrode exposure conditions on the biofilm–metal interface

Djemai-Zoghlache

Isambert

Belhaneche‐Bensemra

2011

J Ind Microbiol Biotechnol

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The industrial crops of microalgae use processes calling upon the presence of parts of metal nature such as steel 316L type. The goal of this study is to test the electrochemical behavior of this material in a marine culture of microalgae. Porphyridium purpureum was used under a photoperiod of alternation darkness/light 12/12 h, in order to apprehend the problems of biocorrosion involved in the biofouling. The evolution of the free potential of corrosion, according to the position of the samples and for different surface roughness, observations of the surface quality under the electron microscope with sweeping were carried out. The results showed that, overall, the strain P. purpureum does not have a corrosive effect on the 316L. The free potential of corrosion lies between -0.307 and -0.005 V(SCE). The adhesion of the cells seems stronger on the interface air/solid of the half-plunged sample with surface grit polished 1,000, confirmed by the presence of biofilm on the air part. The photoperiod acts on the evolution of the generated free potential of corrosion of the one 24-h period oscillation. Furthermore, the samples plunged horizontally lead to a stabilizing effect on the potential of free corrosion.

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“…Finally, we viewed cells in a Jeol JEM‐1400Plus transmission electron microscope. We identified intracellular characteristics by comparing with other studies on the same genus (Bérubé et al ., 1999; Bidle & Falkowski, 2004; Jimenez et al ., 2009; Heakal et al ., 2010).…”

Section: Methodsmentioning

confidence: 99%

Cell size influences inorganic carbon acquisition in artificially selected phytoplankton

et al. 2020

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Summary Cell size influences the rate at which phytoplankton assimilate dissolved inorganic carbon (DIC), but it is unclear whether volume‐specific carbon uptake should be greater in smaller or larger cells. On the one hand, Fick’s Law predicts smaller cells to have a superior diffusive CO2 supply. On the other, larger cells may have greater scope to invest metabolic energy to upregulate active transport per unit area through CO2‐concentrating mechanisms (CCMs). Previous studies have focused on among‐species comparisons, which complicates disentangling the role of cell size from other covarying traits. In this study, we investigated the DIC assimilation of the green alga Dunaliella tertiolecta after using artificial selection to evolve a 9.3‐fold difference in cell volume. We compared CO2 affinity, external carbonic anhydrase (CAext), isotopic signatures (δ13C) and growth among size‐selected lineages. Evolving cells to larger sizes led to an upregulation of CCMs that improved the DIC uptake of this species, with higher CO2 affinity, higher CAext and higher δ13C. Larger cells also achieved faster growth and higher maximum biovolume densities. We showed that evolutionary shifts in cell size can alter the efficiency of DIC uptake systems to influence the fitness of a phytoplankton species.

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Electrochemical behavior of 304L stainless steel in high saline and sulphate solutions containing alga Dunaliella Salina and β-carotene

Cited by 20 publications

References 29 publications

Pitting behavior of friction stir repair-welded 304L stainless steel in 3.5% NaCl solution at room temperature: role of grain and defect structures

Pitting behavior of friction stir repair-welded 304L stainless steel in 3.5% NaCl solution at room temperature: role of grain and defect structures

Electrochemical behavior of the 316L steel type in a marine culture of microalgae (Porphyridium purpureum) under the 12/12 h photoperiod and effect of different working electrode exposure conditions on the biofilm–metal interface

Cell size influences inorganic carbon acquisition in artificially selected phytoplankton

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