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Partager le résultat de cette recherche Interroger des sources externesEffet de l’herbicide sulfonylurée tribenuron méthyle sur la croissance de souches telluriques d’actinobactéries. / Kounouz Rachedi
Titre : Effet de l’herbicide sulfonylurée tribenuron méthyle sur la croissance de souches telluriques d’actinobactéries. : Caractérisation des isolats résistants et tests de dégradabilité Type de document : texte imprimé Auteurs : Kounouz Rachedi, Auteur ; Abderrahmane Boulahrouf, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 100 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Streptomyces Tribenuron méthyle Résistance Hydrolyse acide Cométabolisme ARNr 16S Tribenuron methyl Resistance Acido-hydrolysis Co-metabolism 16S rRNA genes tribenuron Streptomyces??????? ?????? ????? ???? ????? ??????? .S16 ARNr ????? Index. décimale : 570 Sciences de la vie. Biologie Résumé : Granstar® 75 DF is one of the most used sulfonylurea herbicide on cereal crops; it contains 75
% of tribenuron-methyl (TBM). Assessing the changes on soil microbiota, particularly on the
most abundant bacterial groups, will be a useful approach to determine the impact of
Granstar® herbicide. For this purpose, Actinobacteria were analysed. They are known for their
abundance and aptitude to resist to xenobiotic substances. Using a selective medium for
Actinobacteria, forty two (42) strains were isolated from both untreated and Granstar® treated
soils. The number of isolates recovered from the treated agricultural soil 2 was fewer than that
isolated from the corresponding untreated soil, suggesting a negative effect of Granstar®
herbicide on Actinobacteria community. Among the isolates, eleven (11) resistant strains,
tolerating high doses of Granstar® ranging from 0.3 to 0.6% (v/v), were selected.
Morphological characterization of strains indicated their affiliation to Streptomyces genus.
The phylogenetic analysis, based on 16S rRNA genes sequencing, clustered five strains
(SRK3, SRK4, SRK9, SRK11 and SRK18) to Streptomyces rubrocyanodiastaticus sp. piger
type strain, with high bootstrap rates varying from 69 to 98%. While SRK13 and SRK14 were
closely related to Streptomyces lavendulocolor and SRK17 to Streptomyces africanus, with
high bootstrap values of 92; 89 and 76% respectively. SRK12 and SRK16 strains were
associated to four Streptomyces type strains (S. vinaceusdrappus, S. mutabilis, S. ghanaensis
and S. enissocaesilis) with a percentage of 70% of bootstrap. Strain SRK15 was related to
Streptomyces diastaticus sp. ardesiacus with high bootstrap level of 92%. The two most
resistant strains SRK12 and SRK17 did not grow on TBM as the sole carbon source, so they
were incapable of degrading it under these conditions. However, in the presence of glucose,
both tolerated its presence, but their growth was affected, compared to that on glucose, used
alone. At the final pH of 6.78-6.79, the TBM was already predominantly and chemically
degraded to an average rate of 76.18%. By decreasing the pH to 6.72-6.73, the TBM
dissipation increased significantly to an average of 89.36%. Furthermore, at lower acid values
of 4.38 and 4.23; obtained with a similar medium composition supplemented with glucose,
the disappearance of the TBM was further improved by 2.26 and 5.56% respectively with the
strains SRK12 and SRK17. Therefore, as the pH decreased, the TBM was more degraded
probably by acid hydrolysis. In all the tests carried out, as the TBM disappeared, two
compounds appeared in the medium and seemed to do not be affected by the acidity. On the
basis of these observations, it was suggested that the acid hydrolysis of the herbicide may be
the result of a co-metabolic process, due to the bacterial activity on another easily
metabolizable substrate. Such a process would be interesting to consider in the bioremediation
of alkaline soils polluted by TBM. The products of the TBM transformation were not
degraded chemically nor by the studied strains and had a negative effect on the growth of
these strains. This observation leaded to the need of more investigations on these compounds,
in particular their identification and the determination of their fate in the soil.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/RAC7160.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10437 Effet de l’herbicide sulfonylurée tribenuron méthyle sur la croissance de souches telluriques d’actinobactéries. : Caractérisation des isolats résistants et tests de dégradabilité [texte imprimé] / Kounouz Rachedi, Auteur ; Abderrahmane Boulahrouf, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 100 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Streptomyces Tribenuron méthyle Résistance Hydrolyse acide Cométabolisme ARNr 16S Tribenuron methyl Resistance Acido-hydrolysis Co-metabolism 16S rRNA genes tribenuron Streptomyces??????? ?????? ????? ???? ????? ??????? .S16 ARNr ????? Index. décimale : 570 Sciences de la vie. Biologie Résumé : Granstar® 75 DF is one of the most used sulfonylurea herbicide on cereal crops; it contains 75
% of tribenuron-methyl (TBM). Assessing the changes on soil microbiota, particularly on the
most abundant bacterial groups, will be a useful approach to determine the impact of
Granstar® herbicide. For this purpose, Actinobacteria were analysed. They are known for their
abundance and aptitude to resist to xenobiotic substances. Using a selective medium for
Actinobacteria, forty two (42) strains were isolated from both untreated and Granstar® treated
soils. The number of isolates recovered from the treated agricultural soil 2 was fewer than that
isolated from the corresponding untreated soil, suggesting a negative effect of Granstar®
herbicide on Actinobacteria community. Among the isolates, eleven (11) resistant strains,
tolerating high doses of Granstar® ranging from 0.3 to 0.6% (v/v), were selected.
Morphological characterization of strains indicated their affiliation to Streptomyces genus.
The phylogenetic analysis, based on 16S rRNA genes sequencing, clustered five strains
(SRK3, SRK4, SRK9, SRK11 and SRK18) to Streptomyces rubrocyanodiastaticus sp. piger
type strain, with high bootstrap rates varying from 69 to 98%. While SRK13 and SRK14 were
closely related to Streptomyces lavendulocolor and SRK17 to Streptomyces africanus, with
high bootstrap values of 92; 89 and 76% respectively. SRK12 and SRK16 strains were
associated to four Streptomyces type strains (S. vinaceusdrappus, S. mutabilis, S. ghanaensis
and S. enissocaesilis) with a percentage of 70% of bootstrap. Strain SRK15 was related to
Streptomyces diastaticus sp. ardesiacus with high bootstrap level of 92%. The two most
resistant strains SRK12 and SRK17 did not grow on TBM as the sole carbon source, so they
were incapable of degrading it under these conditions. However, in the presence of glucose,
both tolerated its presence, but their growth was affected, compared to that on glucose, used
alone. At the final pH of 6.78-6.79, the TBM was already predominantly and chemically
degraded to an average rate of 76.18%. By decreasing the pH to 6.72-6.73, the TBM
dissipation increased significantly to an average of 89.36%. Furthermore, at lower acid values
of 4.38 and 4.23; obtained with a similar medium composition supplemented with glucose,
the disappearance of the TBM was further improved by 2.26 and 5.56% respectively with the
strains SRK12 and SRK17. Therefore, as the pH decreased, the TBM was more degraded
probably by acid hydrolysis. In all the tests carried out, as the TBM disappeared, two
compounds appeared in the medium and seemed to do not be affected by the acidity. On the
basis of these observations, it was suggested that the acid hydrolysis of the herbicide may be
the result of a co-metabolic process, due to the bacterial activity on another easily
metabolizable substrate. Such a process would be interesting to consider in the bioremediation
of alkaline soils polluted by TBM. The products of the TBM transformation were not
degraded chemically nor by the studied strains and had a negative effect on the growth of
these strains. This observation leaded to the need of more investigations on these compounds,
in particular their identification and the determination of their fate in the soil.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/RAC7160.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10437 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité RAC/7160 RAC/7160 Thèse Bibliothèque principale Thèses Disponible
Titre : Isolation of Shewanella sp. from Algeria and characterization of a system involved in detoxification of chromate Type de document : texte imprimé Auteurs : Hiba Baaziz, Auteur ; Radia Alatou, Directeur de thèse ; Michel Fons, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 144 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
BiologieTags : Shewanella sp. chromate resistance reduction bioremediation Index. décimale : 570 Sciences de la vie. Biologie Résumé : The widespread use of the toxic heavy metal chromium (Cr) in industrial applications resulted in large quantities of Cr being discharged into the environment, causing severe contamination of global soil and water systems. Cr primarily exists in two stable forms, Cr(III) and Cr(VI). The latter is highly toxic due to its strong oxidizing nature and its high solubility. The model organism for bioremediation Shewanella oneidensis MR1 has evolved diverse resistance mechanisms to cope with chromate toxicity. The first aim of the present thesis was to study the chromate resistance and reduction mechanisms of this bacterium under semi-aerobic conditions. We showed that chrASO gene is induced by chromate and its deletion impairs the chromate resistance and reduction capacity of MR-1 strain, we confirmed that its product functions as an efflux pump to extrude chromate ions from the cytoplasm protecting cells from chromate toxicity. With cymAdeletion mutants, we revealed the involvement of the c-type cytochrome CymA in chromate resistance and reduction. We also identified a potential chromate reductase DmsA2, as well as two other proteins Fdh and DmsA1 that are potentially involved in chromate resistance and reduction in MR-1 strain. In the second part of this work, we isolated, identified and characterized two novel Mediterranean Shewanella sp. strains, S. fidelis H76 and S. algidipiscicola H111. Both strains are characterized by their great chromate resistance and their ability to reduce it efficiently even at high concentrations. Although the small size of its genome and the absence of several genes encoding enzymes known to play a role in chromate resistance and reduction, the H111 strain is the best chromate resistant strain. Interestingly, the air liquid interface biofilm (Pellicles) of both strains reduce more efficiently chromate than their freeswimming cells. Moreover, they can accumulate a significant amount of its reduced forms. These characteristics make those strains, in particular H111 strain, suitable candidates for chromate bioremediation.
Diplôme : Doctorat En ligne : ../theses/biologie/BAA7327.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10977 Isolation of Shewanella sp. from Algeria and characterization of a system involved in detoxification of chromate [texte imprimé] / Hiba Baaziz, Auteur ; Radia Alatou, Directeur de thèse ; Michel Fons, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 144 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
BiologieTags : Shewanella sp. chromate resistance reduction bioremediation Index. décimale : 570 Sciences de la vie. Biologie Résumé : The widespread use of the toxic heavy metal chromium (Cr) in industrial applications resulted in large quantities of Cr being discharged into the environment, causing severe contamination of global soil and water systems. Cr primarily exists in two stable forms, Cr(III) and Cr(VI). The latter is highly toxic due to its strong oxidizing nature and its high solubility. The model organism for bioremediation Shewanella oneidensis MR1 has evolved diverse resistance mechanisms to cope with chromate toxicity. The first aim of the present thesis was to study the chromate resistance and reduction mechanisms of this bacterium under semi-aerobic conditions. We showed that chrASO gene is induced by chromate and its deletion impairs the chromate resistance and reduction capacity of MR-1 strain, we confirmed that its product functions as an efflux pump to extrude chromate ions from the cytoplasm protecting cells from chromate toxicity. With cymAdeletion mutants, we revealed the involvement of the c-type cytochrome CymA in chromate resistance and reduction. We also identified a potential chromate reductase DmsA2, as well as two other proteins Fdh and DmsA1 that are potentially involved in chromate resistance and reduction in MR-1 strain. In the second part of this work, we isolated, identified and characterized two novel Mediterranean Shewanella sp. strains, S. fidelis H76 and S. algidipiscicola H111. Both strains are characterized by their great chromate resistance and their ability to reduce it efficiently even at high concentrations. Although the small size of its genome and the absence of several genes encoding enzymes known to play a role in chromate resistance and reduction, the H111 strain is the best chromate resistant strain. Interestingly, the air liquid interface biofilm (Pellicles) of both strains reduce more efficiently chromate than their freeswimming cells. Moreover, they can accumulate a significant amount of its reduced forms. These characteristics make those strains, in particular H111 strain, suitable candidates for chromate bioremediation.
Diplôme : Doctorat En ligne : ../theses/biologie/BAA7327.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10977 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BAA/7327 BAA/7327 Thèse Bibliothèque principale Thèses Disponible
Titre : American cultural imperialism and Chinese resistance through performance : from a postcolonial perspective. Type de document : texte imprimé Auteurs : Allal Belaid, Auteur ; Brahim Harouni, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 226 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
Langue AnglaiseTags : The United States China Imperialism Hegemony Americanization CultureIdeology Resistance Performance Etats-Unis Chine Impérialisme Hégémonie Américanisation Culture Idéologie Résistance ???????? ??????? ????? ??????????? ??????? ???????? ?????? Index. décimale : 420 Anglais et vieil anglais (anglo-saxon) : indice de base 42 Résumé : The wide spread of American culture has recently triggered a controversial debate among scholars in the field of Humanities. The hegemonic phenomenon has affected societies from different corners of the globe, and it appears that even most conservative societies are not safe from such global homogenization. Accordingly, this thesis attempts to describe and analyze American cultural imperialism in light of the twenty-first century global changes and cultural configurations. From a postcolonial view, it examines the complex relationship within the American-Chinese couple. The theoretical part is devoted to study and define the key concepts and their relation with Uncle Sam's expansionist culture. It provides an overall picture of the classic history of the United States to underline the fact that culture has always been the basis of American hegemonic practices around the world. From its creation to the globalization era, passing through continental Americanization, the US has chiefly relied on culture to build up its modern empire. On the way, the thesis examines Chinese society to give evidences about cultural expansion and its impacts on both social structure and consumption. It synthesizes that culture has a great role in controlling societies and more importantly in gaining the US ideological and consuming markets. At last, the thesis investigates the reaction of the Chinese administration, with at its head the Communist Party, against American cultural incursion that plainly impacted Chinese identity and sovereignty. It goes through three important performances which show how China converted a cultural struggle against American imperialism into a prosperous cultural move.
Diplôme : Doctorat En ligne : ../theses/anglais/BEL1521.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10965 American cultural imperialism and Chinese resistance through performance : from a postcolonial perspective. [texte imprimé] / Allal Belaid, Auteur ; Brahim Harouni, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 226 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
Langue AnglaiseTags : The United States China Imperialism Hegemony Americanization CultureIdeology Resistance Performance Etats-Unis Chine Impérialisme Hégémonie Américanisation Culture Idéologie Résistance ???????? ??????? ????? ??????????? ??????? ???????? ?????? Index. décimale : 420 Anglais et vieil anglais (anglo-saxon) : indice de base 42 Résumé : The wide spread of American culture has recently triggered a controversial debate among scholars in the field of Humanities. The hegemonic phenomenon has affected societies from different corners of the globe, and it appears that even most conservative societies are not safe from such global homogenization. Accordingly, this thesis attempts to describe and analyze American cultural imperialism in light of the twenty-first century global changes and cultural configurations. From a postcolonial view, it examines the complex relationship within the American-Chinese couple. The theoretical part is devoted to study and define the key concepts and their relation with Uncle Sam's expansionist culture. It provides an overall picture of the classic history of the United States to underline the fact that culture has always been the basis of American hegemonic practices around the world. From its creation to the globalization era, passing through continental Americanization, the US has chiefly relied on culture to build up its modern empire. On the way, the thesis examines Chinese society to give evidences about cultural expansion and its impacts on both social structure and consumption. It synthesizes that culture has a great role in controlling societies and more importantly in gaining the US ideological and consuming markets. At last, the thesis investigates the reaction of the Chinese administration, with at its head the Communist Party, against American cultural incursion that plainly impacted Chinese identity and sovereignty. It goes through three important performances which show how China converted a cultural struggle against American imperialism into a prosperous cultural move.
Diplôme : Doctorat En ligne : ../theses/anglais/BEL1521.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10965 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/1521 BEL/1521 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l'étude de l'influence de la résistance et la ductilité sur la performance et le comportement des poteaux parasismiques en béton Type de document : texte imprimé Auteurs : Brahim Bousalem ; Université Mentouri, Editeur scientifique ; N. Chikh, Directeur de thèse Année de publication : 2005 Importance : 400p. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : pérformance Béton Ductilité Résistance Comportement Poteauxparasismiques Index. décimale : 624 Génie civil Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=582 Contribution à l'étude de l'influence de la résistance et la ductilité sur la performance et le comportement des poteaux parasismiques en béton [texte imprimé] / Brahim Bousalem ; Université Mentouri, Editeur scientifique ; N. Chikh, Directeur de thèse . - 2005 . - 400p.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : pérformance Béton Ductilité Résistance Comportement Poteauxparasismiques Index. décimale : 624 Génie civil Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=582 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/4327 BOU/4327 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de la variation de la résistance hydraulique au cours de l'exploitation des systèmes d'alimentation en eau Type de document : texte imprimé Auteurs : Slimane Babari ; Université d' Annaba, Editeur scientifique ; G. Tcherkassov, Directeur de thèse Année de publication : 1988 Importance : 95 f. Note générale : 1 Disponible à la salle de recherche
2 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : Résistance Hydraulique système d'alimentation en eau Index. décimale : 624 Génie civil Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=542 Etude de la variation de la résistance hydraulique au cours de l'exploitation des systèmes d'alimentation en eau [texte imprimé] / Slimane Babari ; Université d' Annaba, Editeur scientifique ; G. Tcherkassov, Directeur de thèse . - 1988 . - 95 f.
1 Disponible à la salle de recherche
2 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : Résistance Hydraulique système d'alimentation en eau Index. décimale : 624 Génie civil Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=542 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BAB/1006 BAB/1006 Thèse Bibliothèque principale Thèses Disponible
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