Mahmoud Hayek

Mahmoud Hayek
IMT Mines Alès | EMA · Laboratoire de Mécanique et Génie Civil (LMGC)

Dr

About

14
Publications
1,325
Reads
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35
Citations
Introduction
Mes axes de recherche portent (i) sur l'étude des mécanismes microbiens susceptibles d'influencer la biocolonisation (formation de biofilm) d'une surface immergée dans l'eau de mer, (ii) sur la caractérisation des proptiétés physico-chimiques (surface, envioronnement) qui influencent le processus de la biocolonisation, (iii) sur la valorisation des sédiments marins dans des matériaux de constructions comme le béton afin de répondre à des intérêts écologiques et économiques.
Additional affiliations
December 2021 - present
IMT Mines Alès
Position
  • Engineer
October 2020 - August 2021
Aix-Marseille Université
Position
  • ATER
September 2018 - September 2020
IMT Mines Alès
Position
  • PostDoc Position
Description
  • Biocolonisation of concrete in marine environment
Education
September 2013 - August 2014
Lebanese University
Field of study
  • Microbiology
September 2012 - August 2013
Lebanese University
Field of study
  • Biochemisty
September 2009 - August 2012
Lebanese University
Field of study
  • Biochemisty

Publications

Publications (14)
Article
Full-text available
The present paper provides correlative evidence that the mineralogical composition of rocks may influence marine assemblages in Mediterranean shallow sublittoral rocky habitats. They point out that direct effects on sessile organisms (e.g. macroalgae) may cascade up through the entire community and affect higher trophic levels (e.g. carnivorous fis...
Article
Full-text available
Hayek et al., (2019) have shown that Shewanella woodyi MS32 (luminescent marine bacteria) has an active AHL QS system. This system consists of C8-HSL (N-Octanoyl-Lhomoserine lactone), swoI and swoR. C8-HSL is the signal molecule. swoI and swoR encode SwoI and SwoR, C8-HSL synthesis and reception proteins respectively. This system regulates the lumi...
Article
Full-text available
Coastal marine ecosystems provide essential benefits and services to humanity, but many are rapidly degrading. Human activities are leading to significant land take along coastlines and to major changes in ecosystems. Ecological engineering tools capable of promoting large-scale restoration of coastal ecosystems are needed today in the face of inte...
Article
Concrete is a complex composite material; whose different components allow it to adapt to very different uses due to its physicochemical characteristics adaptable to very varied conditions. Its mechanical performance, exceptional durability and moderate cost explain the wide use of this material in the construction of marine structures. Submerged i...
Article
Civil engineers have a responsibility to take measures to protect marine biodiversity by selecting more bioreceptive construction materials in the design of marine infrastructure, for better biodiversity conservation. In this study, it was shown that pre-carbonation of cementitious materials accelerates their bacterial colorization by lowering the...
Article
Full-text available
Engineers specializing in civil engineering must integrate into their design measures to protect marine biodiversity, which authorizes the concept of eco-design of marine infrastructure that respects the environment. The cementitious materials are preferred to design marine infrastructure and interact with the marine environment. These structures w...
Article
Full-text available
Quorum sensing (QS), a cell-to-cell communication system involved in the synchronization of bacterial behavior in a cell-density-dependent manner has been shown to control phenotypes such as luminescence, virulence, and biofilm formation. The marine strain, Shewanella woodyi MS32 has been identified as a luminous bacterium. Very little information...
Presentation
Full-text available
Cette étude a pour objectif d'optimiser la durabilité des ouvrages maritimes du génie civil et de limiter leurs impacts sur l’environnement (écoconception) par la détermination des facteurs liés au matériau béton pouvant agir sur la biocolonisation et la bioréceptivité d’une structure en béton immergée dans l’eau de mer
Poster
Full-text available
Objectif : Déterminer les facteurs liés au matériau béton pouvant agir sur la biocolonisation et la bioréceptivité d’une structure en béton immergée dans l’eau de mer
Article
L'activité humaine sur le littoral a un impact majeur sur l'environnement et sur la biodiversité sous-marine. La démarche d'éco-conception permet d'intégrer les objectifs environnementaux à la conception structurelle des ouvrages qui sont aptes à remplir leurs fonctions techniques et une fonction environnementale de support de la biodiversité. L'éc...
Thesis
Le « quorum sensing » (QS) est un moyen de communication bactérienne impliquant des petites molécules appelées auto-inducteurs qui au-delà d’un certain seuil de concentration induisent une synchronisation de l’expression génétique au sein de la communauté bactérienne. Ce mécanisme est impliqué dans plusieurs processus bactériens tels que la lumines...
Poster
Full-text available
Quorum sensing (QS) or cell-to-cell communication is a process by which bacteria produce and detect signal molecules and thereby coordinate their behavior in a cell-density dependent manner. The sequenced genome of the marine bioluminescent strain S. woodyi MS32 contains genes coding for the AHL QS system. The goal of this study is to identify the...
Poster
Full-text available
Quorum sensing (QS) or cell-to-cell communication is a process by which bacteria produce and detect signal molecules and thereby coordinate their behavior in a cell-density dependent manner. Two main QS systems can be distinguished: the acylhomoserine lactone (AHL) and the autoinducer-2 (AI-2). The sequenced genome of the marine bioluminescent Shew...

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Projects

Projects (2)
Archived project
To identify the QS communication systems of S. woodyi and to understand the role of this communication system in luminescence emission, adhesion and biofilm formation
Project
The aim of this project is to master and clarify the intrinsic parameters that influence the bioreceptivity of cementitious materials in the marine environment, in the context of coastal infrastructure construction. It is also to identify the parameters that influence the biocolonization of marine structures, in order to help engineers in their new challenge of designing marine infrastructures using green concrete.