The Relation Between the Surface Chemical Composition of Escherichia coli and their Electron Donor/Electron Acceptor (Acid-base) Properties

Hamadi, Fatima; Latrache, Hassan; Zahir, Hafida; Abed, Soumya El; Ellouali, Mostafa; Koraichi, Saâd Ibnsouda

doi:10.3923/jm.2012.32.40

Cited by 20 publications

(19 citation statements)

References 20 publications

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“…In fact, only E. coli strains 13, 76, EI3, EI2, and 65 were hydrophilic according to these approaches. These results showed similarities with those of Hamadi [ 9 , 12 ], who reported that E. coli strains isolated from patients with urinary tract infections are hydrophilic with both approaches.…”

Section: Discussionsupporting

confidence: 87%

“…ese results showed similarities with those of Hamadi [9,12], who reported that E. coli strains isolated from patients with urinary tract infections are hydrophilic with both approaches.…”

Section: Ecoli Ei1 Ecoli 38 Ecol 64 Ecoli 19 Ecoli Em3 Ecoli Em4 Ecoli 13 Ecoli Ei3 Ecoli Ei4 Ecoli 76 Ecoli Ei2 Ecoli 65supporting

confidence: 82%

“…Microbial adhesion is a complex phenomenon involving several parameters and energy interactions, among which the most remarkable are the physicochemical properties of bacterial and support surfaces [4,[7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Adhesion Behavior of Escherichia coli Strains on Glass: Role of Cell Surface Qualitative and Quantitative Hydrophobicity in Their Attachment Ability

Elfazazi¹,

Zahir²,

Tankiouine³

et al. 2021

International Journal of Microbiology

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Microbial adhesion to surfaces is thought to involve physicochemical interactions between the substrate and microbial cells. Understanding the physicochemical aspects involved in the adhesion phenomenon, as a critical step in biofilm formation, is essential to finding ways to prevent their formation and control biocontamination risks. The aim of this study was to investigate the relation between the adhesion behavior of 12 Escherichia coli strains isolated from food and their surface hydrophobicities using qualitative ( θ w ) and quantitative (ΔGiwi) approaches. The surface physicochemical properties of both bacterial cells and glass material were estimated through contact angle measurements. The adhesive behavior of E. coli strains on a glass surface was assessed. The results showed a good logarithmic relation between the percentage of the adhered cells and their surface hydrophobicity with the quantitative approach ΔGiwi; however, qualitative hydrophobicity ( θ w ) appeared to demonstrate no effect regarding adhesion behavior. This work lays the foundation for future studies and opens an important debate on the mechanisms underlying the adhesion behavior of E. coli strains by using the thermodynamic approach (ΔGiwi) as an important model of hydrophobicity that could explain and predict better bacterial adhesion ability.

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Section: Discussionsupporting

confidence: 87%

“…ese results showed similarities with those of Hamadi [9,12], who reported that E. coli strains isolated from patients with urinary tract infections are hydrophilic with both approaches.…”

Section: Ecoli Ei1 Ecoli 38 Ecol 64 Ecoli 19 Ecoli Em3 Ecoli Em4 Ecoli 13 Ecoli Ei3 Ecoli Ei4 Ecoli 76 Ecoli Ei2 Ecoli 65supporting

confidence: 82%

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Adhesion Behavior of Escherichia coli Strains on Glass: Role of Cell Surface Qualitative and Quantitative Hydrophobicity in Their Attachment Ability

Elfazazi¹,

Zahir²,

Tankiouine³

et al. 2021

International Journal of Microbiology

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“…The surface of the two varieties express an important electron donor character [high value of γ (-) ] Table 3. This may be due to the difference in the chemical composition of the two varieties studied, but no relationship has been etablished between the elemental composition, functional composition (expressed as a percentage), and the electron-donor character (Hamadi et al 2012).…”

Section: Discussionmentioning

confidence: 97%

A newly developed method based on surface physicochemical proprieties, for measuring the maturation level of olive fruit

Soufiani¹,

Ben-Salah²,

Zahir³

et al. 2021

Res. Agric. Eng.

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The maturation process is an important determining factor to initiate the fermentation process in olive fruit. Level of maturation classically determined by the color of the olive fruit. In this study, we aim to develop a measurable criterion based on physicochemical properties and surface roughness of two important olive varieties grown in Morocco. The hydrophobic/hydrophilic properties and the electron donor-acceptor character of the olives were calculated. The obtained results showed a very clear change in the electron donor character and the surface roughness of the two studied varieties. This change depended on the degree of maturity and the nature of the cultivar. The electron donor character decreased (two times) with an increasing degree of maturity for the Arbequina, contrary to the Picholine variety, which showed a significant increase (4 times). Surface roughness increased 10 times for the Arbequina and decreased 5 times for the Picholine as maturity progressed from the green to the black stage. These findings may be useful in the management/prediction of the process of table olive fermentation.

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“…Such characteristics were expressed in terms of surface charge, hydrophobicity, and electron donor-acceptor properties of bacterial cell surface. These could influence the attractive and repulsive forces between cell and mucosal surfaces, therefore modulating the adhesion level (Hamadi et al 2012). In the meantime, the specific adhesion-receptor interaction is an essential mechanism of microbial adhesion on GI surface.…”

Section: Introductionmentioning

confidence: 99%

Variation of mucin adhesion, cell surface characteristics, and molecular mechanisms among Lactobacillus plantarum isolated from different habitats

Buntin

Vos

Hongpattarakere

2017

Appl Microbiol Biotechnol

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The adhesion ability to mucin varied greatly among 18 Lactobacillus plantarum isolates depending on their isolation habitats. Such ability remained at high level even though they were sequentially exposed to the gastrointestinal (GI) stresses. The majority of L. plantarum isolated from shrimp intestine and about half of food isolates exhibited adhesion ability (51.06-55.04%) about the same as the well-known adhesive L. plantarum 299v. Interestingly, five infant isolates of CIF17A2, CIF17A4, CIF17A5, CIF17AN2, and CIF17AN8 exhibited extremely high adhesion ranging from 62.69 to 72.06%. Such highly adhesive property correlating to distinctively high cell surface hydrophobicity was significantly weaken after pretreatment with LiCl and guanidine-HCl confirming the entailment of protein moiety. Regarding the draft genome information, all molecular structures of major cell wall-anchored proteins involved in the adhesion based on L. plantarum WCSF1, including lp_0964, lp_1643, lp_3114, lp_2486, lp_3127, and lp_3059 orthologues were detected in all isolates. Exceptionally, the gene-trait matching between yeast agglutination assay and the relevant mannose-specific adhesin (lp_1229) encoding gene confirmed the Msa absence in five infant isolates expressed distinctively high adhesion. Interestingly, the predicted flagellin encoding genes (fliC) firstly revealed in lp_1643, lp_2486, and lp_3114 orthologues may potentially contribute to such highly adhesive property of these isolates.

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The Relation Between the Surface Chemical Composition of Escherichia coli and their Electron Donor/Electron Acceptor (Acid-base) Properties

Cited by 20 publications

References 20 publications

Adhesion Behavior of Escherichia coli Strains on Glass: Role of Cell Surface Qualitative and Quantitative Hydrophobicity in Their Attachment Ability

Adhesion Behavior of Escherichia coli Strains on Glass: Role of Cell Surface Qualitative and Quantitative Hydrophobicity in Their Attachment Ability

A newly developed method based on surface physicochemical proprieties, for measuring the maturation level of olive fruit

Variation of mucin adhesion, cell surface characteristics, and molecular mechanisms among Lactobacillus plantarum isolated from different habitats

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