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Partager le résultat de cette recherche Interroger des sources externesContribution à l’étude pour la caractérisation du fromage traditionnel « Bouhezza » au lait de chèvre. / Hacene Medjoudj
Titre : Contribution à l’étude pour la caractérisation du fromage traditionnel « Bouhezza » au lait de chèvre. Type de document : texte imprimé Auteurs : Hacene Medjoudj, Auteur ; Mohammed Nasreddine Zidoune, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 225 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Chaouia Chekoua (Djeld) lait cru de chèvre Fromage traditionnel Bouhezza physico-chimie et
microbiologie Qualité Hygiénique classification bactéries lactiques affinage protéolyse lipolyse profil aromatique profil de texture raw goat's milk traditional Bouhezza cheese physico-chemistry and
microbiology hygienic quality lactic acid bacteria ripening proteolysis lipolysis aromatic profile texture profile "الشاوية الشكوة أوجلد بوهزة حليب الماعز الخام جبن بوهزة التقليدي الكيميا الفيزيائية وعلم الأحيا الدقيقة و الجودة الحية والتني وبكتيريا حمض ال كتيك والتكرير والملمس الشخ ي"Index. décimale : 640 Industrie Alimentaire Résumé : Bouhezza is a traditional Algerian cheese, from Chaouia terroir produced from different types of milk (goat, sheep and cow). Its manufacture refining is carried out in a skin bag prepared traditionally from goatskin or sheepskin, called Djeld or Chekoua of Bouhezza.
The objective of the study was to contribute to the characterization of traditional cheese Bouhezza through a survey in different regions of Chaouia, in northeastern Algeria. A physicochemical, biochemical and microbiological characterization of Bouhezza prepared with goat’ raw milk.
The survey was conducted among 617 families in urban areas and 225 in rural areas, in order to establish the production diagram of Bouhezza and delineate the geographical area of his practice. Thirteen cheese making of Bouhezza with raw goat milk were made; 2 experimental in laboratory (LNTA-I.N.A.T.A-A) - University of Constantine 1) and 11 in farms (4 in Tébessa and 7 in Oum El-Bouaghi). During ripening, physicochemical and microbiological analyzes were carried out. Determination of proteolysis during maturation, isolation and identification of proteolytic lactic acid bacteria found in the cheese were performed by SDS-PAGE electrophoresis and PCR. Peptide profile was analyzed by RP-HPLC. The evaluation of the proteolysis rate, highlighting profiles lipid by GC, and aromatic by GC-MS, with a sensory analysis and texture profile of Bouhezza cheese. The microbiological characterization of cheese with identification of lactic acid bacteria by sequencing of 16S rDNA
using PCR-TTGE.
The investigation confirmed the practice of Bouhezza in different regions of Chaouia in 5 wilayas; Khenchela, Batna, Tebessa, Souk Ahras and Oum El Bouaghi. Of 498 respondents, 49.76% (247) know and manufacture Bouhezza. He is also called ""Milh Dhouaba"" at Tébessa.
The microbiological analysis revealed a high number of lactic acid bacteria, of the order of 7.7 to 8.9 log cfu / g of cheese, the absence of pathogenic bacteria, while the flora of contamination was present at the beginning of manufacturing, but decreased with time. Therefore, the cheese has an acceptable hygienic quality. The lactic flora showed fluctuations during manufacture with a heavy load of lactic Streptococci consisting essentially of strains of:
Lc. lactis subsp. cremoris and S. gallolyticus subsp. macedonicus. Lactobacilli are present with a low charge, composed of Lb. plantarum, Lb. johnsonni, Lb. gasseri; Lb. fermentum, Lb. helveticus, Lb. acidophilus and Lb. crispatus.
Bouhezza is an acidic fermented product with an average pH of 3.88 and an average acidity of 1.85 g / 100 g of lactic acid. The protein / DM level was 22.20% and the fat / DM content 41.18%. The results showed that the dry matter averaged 35.65%. The moisture content in the defatted cheese is 68.55% and 79.05%, the fat-in-dry matter of 47.65% and 34.77%.
Nitrogen fractions soluble in water and in 12% TCA decreased at the beginning of the ripening process and then increased at the end of ripening. SDS-PAGE analysis on Bouhezza samples showed moderate proteolysis, from 30 days of maturation. Urea PAGE of caseins showed rapid proteolysis. Six proteolytic lactic acid bacteria (LABs), four of which have been identified by 16S rDNA sequencing, were two strains of Enterococcus faecalis, one Enterococcus faecium and one Lactobacillus paracasei ssp. paracasei.
RP-HPLC analysis of the soluble fraction at pH 4.4 showed the changes that occurred during the refining process where the peptide profile confirmed proteolysis during cheese maturation.
A total of more than 100 volatile compounds have been identified in goat cheese Bouhezza, the main classes of which are carboxylic acids, esters and alcohols, followed by aldehydes, ketones, terpenes and various compounds.
Goat's milk cheese has been classified as ripened cheeses semi-soft to soft and semi-fat to all fat according to the codex alimentarius. Bouhezza has a good microbial diversity, which would contribute to its ripening and provide it with its organoleptic characteristics. The sensory evaluation showed that Bouhezza is salty, spicy and intense in smell and aroma. The study showed that Bouhezza cheese was rich in volatiles with a variety of odorous components that give the cheese its particularities reflecting the identity of this local cheese.
Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/MED7235.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10820 Contribution à l’étude pour la caractérisation du fromage traditionnel « Bouhezza » au lait de chèvre. [texte imprimé] / Hacene Medjoudj, Auteur ; Mohammed Nasreddine Zidoune, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 225 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Chaouia Chekoua (Djeld) lait cru de chèvre Fromage traditionnel Bouhezza physico-chimie et
microbiologie Qualité Hygiénique classification bactéries lactiques affinage protéolyse lipolyse profil aromatique profil de texture raw goat's milk traditional Bouhezza cheese physico-chemistry and
microbiology hygienic quality lactic acid bacteria ripening proteolysis lipolysis aromatic profile texture profile "الشاوية الشكوة أوجلد بوهزة حليب الماعز الخام جبن بوهزة التقليدي الكيميا الفيزيائية وعلم الأحيا الدقيقة و الجودة الحية والتني وبكتيريا حمض ال كتيك والتكرير والملمس الشخ ي"Index. décimale : 640 Industrie Alimentaire Résumé : Bouhezza is a traditional Algerian cheese, from Chaouia terroir produced from different types of milk (goat, sheep and cow). Its manufacture refining is carried out in a skin bag prepared traditionally from goatskin or sheepskin, called Djeld or Chekoua of Bouhezza.
The objective of the study was to contribute to the characterization of traditional cheese Bouhezza through a survey in different regions of Chaouia, in northeastern Algeria. A physicochemical, biochemical and microbiological characterization of Bouhezza prepared with goat’ raw milk.
The survey was conducted among 617 families in urban areas and 225 in rural areas, in order to establish the production diagram of Bouhezza and delineate the geographical area of his practice. Thirteen cheese making of Bouhezza with raw goat milk were made; 2 experimental in laboratory (LNTA-I.N.A.T.A-A) - University of Constantine 1) and 11 in farms (4 in Tébessa and 7 in Oum El-Bouaghi). During ripening, physicochemical and microbiological analyzes were carried out. Determination of proteolysis during maturation, isolation and identification of proteolytic lactic acid bacteria found in the cheese were performed by SDS-PAGE electrophoresis and PCR. Peptide profile was analyzed by RP-HPLC. The evaluation of the proteolysis rate, highlighting profiles lipid by GC, and aromatic by GC-MS, with a sensory analysis and texture profile of Bouhezza cheese. The microbiological characterization of cheese with identification of lactic acid bacteria by sequencing of 16S rDNA
using PCR-TTGE.
The investigation confirmed the practice of Bouhezza in different regions of Chaouia in 5 wilayas; Khenchela, Batna, Tebessa, Souk Ahras and Oum El Bouaghi. Of 498 respondents, 49.76% (247) know and manufacture Bouhezza. He is also called ""Milh Dhouaba"" at Tébessa.
The microbiological analysis revealed a high number of lactic acid bacteria, of the order of 7.7 to 8.9 log cfu / g of cheese, the absence of pathogenic bacteria, while the flora of contamination was present at the beginning of manufacturing, but decreased with time. Therefore, the cheese has an acceptable hygienic quality. The lactic flora showed fluctuations during manufacture with a heavy load of lactic Streptococci consisting essentially of strains of:
Lc. lactis subsp. cremoris and S. gallolyticus subsp. macedonicus. Lactobacilli are present with a low charge, composed of Lb. plantarum, Lb. johnsonni, Lb. gasseri; Lb. fermentum, Lb. helveticus, Lb. acidophilus and Lb. crispatus.
Bouhezza is an acidic fermented product with an average pH of 3.88 and an average acidity of 1.85 g / 100 g of lactic acid. The protein / DM level was 22.20% and the fat / DM content 41.18%. The results showed that the dry matter averaged 35.65%. The moisture content in the defatted cheese is 68.55% and 79.05%, the fat-in-dry matter of 47.65% and 34.77%.
Nitrogen fractions soluble in water and in 12% TCA decreased at the beginning of the ripening process and then increased at the end of ripening. SDS-PAGE analysis on Bouhezza samples showed moderate proteolysis, from 30 days of maturation. Urea PAGE of caseins showed rapid proteolysis. Six proteolytic lactic acid bacteria (LABs), four of which have been identified by 16S rDNA sequencing, were two strains of Enterococcus faecalis, one Enterococcus faecium and one Lactobacillus paracasei ssp. paracasei.
RP-HPLC analysis of the soluble fraction at pH 4.4 showed the changes that occurred during the refining process where the peptide profile confirmed proteolysis during cheese maturation.
A total of more than 100 volatile compounds have been identified in goat cheese Bouhezza, the main classes of which are carboxylic acids, esters and alcohols, followed by aldehydes, ketones, terpenes and various compounds.
Goat's milk cheese has been classified as ripened cheeses semi-soft to soft and semi-fat to all fat according to the codex alimentarius. Bouhezza has a good microbial diversity, which would contribute to its ripening and provide it with its organoleptic characteristics. The sensory evaluation showed that Bouhezza is salty, spicy and intense in smell and aroma. The study showed that Bouhezza cheese was rich in volatiles with a variety of odorous components that give the cheese its particularities reflecting the identity of this local cheese.
Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/MED7235.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10820 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Etude du pouvoir technologique de quelques bactéries lactiques du fromage traditionnel Bouhezza. Type de document : texte imprimé Auteurs : Amal Boullouf, Auteur ; Mohammed Nasreddine Zidoune, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 117 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Technologie Alimentaire: Sciences alimentaires fromage Bouhezza bactéries lactiques acide lactique protéolyse arômes activité antibactérienne Bouhezza cheese lactic acid bacteria lactic acid proteolysis aroma antibacterial activity جبن بوهزة بكتيريا الحليب حمض اللبن التحلل البروتيني النكهة تثبيط البكتيريا الممرضة Index. décimale : 640 Industrie Alimentaire Résumé :
The present study focuses on the study of technological properties of some strains of lactic acid bacteria isolated from the traditional Algerian cheese; Bouhezza Bouhezza is a traditional Algerian cheese known in the east of Algeria (Oum el Bouaghi, Khenchella, Batna, Biskra, etc.…). Its exceptional manufacture is based on the use of a goatskin container with Lben salted and raw cow’s milk during a few weeks. The physicochemical analyses of Bouhezza showed a dry matter between 20,4 ± 0,28 and 30,25 ± 0,60% per one hundred grams of cheese . The pH is between 3,79 ± 0,02 and 4,32 ± 0,05 and the acidity is between 3,51 and 5,79 g of lactic acid per one hundred grams of cheese. The microbial enumerations of the various flora showed the prevalence of the lactic flora presented by the lactobacilli and streptococci with loads of 105 to 107 FCU/g and 105 to 108 FCU/g respectively followed by yeasts and the moulds. The pathogenic flora is absent.
The insulation and the purification related to thirty six (36) strains. Nineteen (19) of them made object of the physiological and biochemical identification and the study of the technological capacity. The results indicate the predominance of Lactobacillus genera (41,10%) followed by Leuconostoc (21,05%), Pediococcus (10,52%) and Enterococcus (15,78%). Lactococcus and Bifidobacterium are less significant with 05,26% for each one. The results of the evaluation of technological traits indicate a good acidifying aptitude of Lactobacillus genera (until 67°D) and Pediococcus (65°D), an average acidifying capacity of Leuconostoc (between 30°D and 44°D) and low activity for Enterococcus (25°D). The strains of Lactobacillus have a significant proteolytic capacity (zone of lysis 16 to 18 mm) follow-up by those of Pediococcus genera (15,5 mm) The three other kinds have a similar proteolytic activity ( around 13 mm). The aromatizing capacity, studied by the production of acétoïne, is noticed more in all strains of Lactobacillus genera and differs in the others genus. The study of the antimicrobial activity by the technique of diffusion out of well showed the inhibition of L. monocytogenes ATCC, E. coli (DH5) and B. cereus with strains of Lactobacillus genera. The diameters were between 15 and 30 mm. A less inhibition was obtained with the others genera; Enterococcus, Pediococcus, Lactococcus and Leuconostoc.
Note de contenu :
Annexes.Diplôme : Magistère En ligne : ../theses/agronomie/BOU6811.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10071 Etude du pouvoir technologique de quelques bactéries lactiques du fromage traditionnel Bouhezza. [texte imprimé] / Amal Boullouf, Auteur ; Mohammed Nasreddine Zidoune, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 117 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Technologie Alimentaire: Sciences alimentaires fromage Bouhezza bactéries lactiques acide lactique protéolyse arômes activité antibactérienne Bouhezza cheese lactic acid bacteria lactic acid proteolysis aroma antibacterial activity جبن بوهزة بكتيريا الحليب حمض اللبن التحلل البروتيني النكهة تثبيط البكتيريا الممرضة Index. décimale : 640 Industrie Alimentaire Résumé :
The present study focuses on the study of technological properties of some strains of lactic acid bacteria isolated from the traditional Algerian cheese; Bouhezza Bouhezza is a traditional Algerian cheese known in the east of Algeria (Oum el Bouaghi, Khenchella, Batna, Biskra, etc.…). Its exceptional manufacture is based on the use of a goatskin container with Lben salted and raw cow’s milk during a few weeks. The physicochemical analyses of Bouhezza showed a dry matter between 20,4 ± 0,28 and 30,25 ± 0,60% per one hundred grams of cheese . The pH is between 3,79 ± 0,02 and 4,32 ± 0,05 and the acidity is between 3,51 and 5,79 g of lactic acid per one hundred grams of cheese. The microbial enumerations of the various flora showed the prevalence of the lactic flora presented by the lactobacilli and streptococci with loads of 105 to 107 FCU/g and 105 to 108 FCU/g respectively followed by yeasts and the moulds. The pathogenic flora is absent.
The insulation and the purification related to thirty six (36) strains. Nineteen (19) of them made object of the physiological and biochemical identification and the study of the technological capacity. The results indicate the predominance of Lactobacillus genera (41,10%) followed by Leuconostoc (21,05%), Pediococcus (10,52%) and Enterococcus (15,78%). Lactococcus and Bifidobacterium are less significant with 05,26% for each one. The results of the evaluation of technological traits indicate a good acidifying aptitude of Lactobacillus genera (until 67°D) and Pediococcus (65°D), an average acidifying capacity of Leuconostoc (between 30°D and 44°D) and low activity for Enterococcus (25°D). The strains of Lactobacillus have a significant proteolytic capacity (zone of lysis 16 to 18 mm) follow-up by those of Pediococcus genera (15,5 mm) The three other kinds have a similar proteolytic activity ( around 13 mm). The aromatizing capacity, studied by the production of acétoïne, is noticed more in all strains of Lactobacillus genera and differs in the others genus. The study of the antimicrobial activity by the technique of diffusion out of well showed the inhibition of L. monocytogenes ATCC, E. coli (DH5) and B. cereus with strains of Lactobacillus genera. The diameters were between 15 and 30 mm. A less inhibition was obtained with the others genera; Enterococcus, Pediococcus, Lactococcus and Leuconostoc.
Note de contenu :
Annexes.Diplôme : Magistère En ligne : ../theses/agronomie/BOU6811.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10071 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6811 BOU/6811 Thèse Bibliothèque principale Thèses Disponible
Titre : Caractérisation des bactéries lactiques autochtones productrices d’exopolysaccharides et étude de leurs effets intrinsèques sur une matrice laitière. Type de document : texte imprimé Auteurs : Nadia Benhedane née Bachtarzi, Auteur ; Karima Kharroub, Directeur de thèse ; Patricia Ruas-Madiedo, Directeur de thèse Mention d'édition : 02/11/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 226 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Biotechnologie: Sciences Alimentaires fermented dairy products lactic acid bacteria exopolysaccharides structure viscosity produits laitiers fermentés bactéries lactiques viscosité منتجات الألبان المخمرة بكتيريا حمض اللاكتيك السكريات الخارجية البنية اللزوجة Index. décimale : 640 Industrie Alimentaire Résumé :
The naturally fermented dairy products are an interesting source of new strains of lactic acid bacteria (LAB) with proven technological potential. Some of them are capable of synthesizing exopolysaccharides (EPS) during fermentation, which improve the rheological properties of dairy matrices. This thesis work focuses on the selection of LAB producing EPS from local fermented dairy products. A total of 30 samples were collected in Eastern Algeria, from which 584 presumptive isolates of LAB were tested for the production of EPS. Only 18 isolates presented a productive phenotype, their polyphasic characterization confirmed that they belong to two species: Leuconostoc mesenteroides and Lactobacillus plantarum. A preselection based on the stability of EPS production character made it possible to retain 6 strains in addition to a control strain, all affiliated to the Lactobacillus plantarum species. Then macroscopic characterization of their lactic gels allowed to select two strains LBIO1 and LBIO28 producing viscosifying EPS in a dairy matrix. The study of their production revealed that the polymers produced are primary metabolites, with a high molecular weight. In parallel, a characterization of the macro and microstructure under confocal laser scanning microscopy of the two gels SMCLBIO1 and SMCLBIO28, compared to the control gel SMCLBIO14, concluded that the EPS of the two ropy strains contribute significantly to the improvement of the physical attributes of lactic gels. Furthermore, micrographs made by cryo-electron microscopy showed the existence of a dense web-like EPS attached to the cells for both ropy strains, which is not observed for LBIO14. Finally, a complete sequencing of the three genomes followed by an in silico genomic analysis confirmed the safety of the strains and the existence of genes coding for bacteriocins and vitamins. The study of the biosynthetic machinery of EPS in comparison with the reference strain Lactobacillus plantarum WCF1 revealed the presence of 2 complete eps clusters cps3 and cps4 in the three genomes with 100% similarity between them, all chromosomal. However, the two strains LBIO1 and LBIO28 have in addition genes belonging to cps2, which would therefore be involved in the synthesis of the ropy polymer with high molecular weight. The two ropy strains LBIO1 and LBIO28 can therefore be exploited in dairy fermentation, based on the techno-functional properties of their polymers, which contribute to the improvement of the rheological characteristics of the matrices generated.
Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/BAC7671.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11505 Caractérisation des bactéries lactiques autochtones productrices d’exopolysaccharides et étude de leurs effets intrinsèques sur une matrice laitière. [texte imprimé] / Nadia Benhedane née Bachtarzi, Auteur ; Karima Kharroub, Directeur de thèse ; Patricia Ruas-Madiedo, Directeur de thèse . - 02/11/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 226 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Biotechnologie: Sciences Alimentaires fermented dairy products lactic acid bacteria exopolysaccharides structure viscosity produits laitiers fermentés bactéries lactiques viscosité منتجات الألبان المخمرة بكتيريا حمض اللاكتيك السكريات الخارجية البنية اللزوجة Index. décimale : 640 Industrie Alimentaire Résumé :
The naturally fermented dairy products are an interesting source of new strains of lactic acid bacteria (LAB) with proven technological potential. Some of them are capable of synthesizing exopolysaccharides (EPS) during fermentation, which improve the rheological properties of dairy matrices. This thesis work focuses on the selection of LAB producing EPS from local fermented dairy products. A total of 30 samples were collected in Eastern Algeria, from which 584 presumptive isolates of LAB were tested for the production of EPS. Only 18 isolates presented a productive phenotype, their polyphasic characterization confirmed that they belong to two species: Leuconostoc mesenteroides and Lactobacillus plantarum. A preselection based on the stability of EPS production character made it possible to retain 6 strains in addition to a control strain, all affiliated to the Lactobacillus plantarum species. Then macroscopic characterization of their lactic gels allowed to select two strains LBIO1 and LBIO28 producing viscosifying EPS in a dairy matrix. The study of their production revealed that the polymers produced are primary metabolites, with a high molecular weight. In parallel, a characterization of the macro and microstructure under confocal laser scanning microscopy of the two gels SMCLBIO1 and SMCLBIO28, compared to the control gel SMCLBIO14, concluded that the EPS of the two ropy strains contribute significantly to the improvement of the physical attributes of lactic gels. Furthermore, micrographs made by cryo-electron microscopy showed the existence of a dense web-like EPS attached to the cells for both ropy strains, which is not observed for LBIO14. Finally, a complete sequencing of the three genomes followed by an in silico genomic analysis confirmed the safety of the strains and the existence of genes coding for bacteriocins and vitamins. The study of the biosynthetic machinery of EPS in comparison with the reference strain Lactobacillus plantarum WCF1 revealed the presence of 2 complete eps clusters cps3 and cps4 in the three genomes with 100% similarity between them, all chromosomal. However, the two strains LBIO1 and LBIO28 have in addition genes belonging to cps2, which would therefore be involved in the synthesis of the ropy polymer with high molecular weight. The two ropy strains LBIO1 and LBIO28 can therefore be exploited in dairy fermentation, based on the techno-functional properties of their polymers, which contribute to the improvement of the rheological characteristics of the matrices generated.
Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/BAC7671.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11505 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BAC/7671 BAC/7671 Thèse Bibliothèque principale Thèses Disponible
Titre : Caractérisation des bactéries lactiques isolées du beurre cru, évaluation de leurs aptitudes technologiques et leur utilisation dans la fabrication de la crème sure Type de document : texte imprimé Auteurs : Bilal Latreche, Auteur ; Karima Kharroub, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 130 f. Format : 30 cm. Note générale : 2 copies imprimes disponibles Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Technologie alimentaire Bactérie lactique beurre cru ferments mixtes aptitudes technologiques crème sure lactic acid bacteria raw butter mixed starters technological ability sour cream البكتریا اللبنية زبدة البقر خميرة لبنية القابلية التكنولوجية قشدة الحليب الحامضة Index. décimale : 640 Industrie Alimentaire Résumé : Dairy products are considered to be a good source of lactic acid bacteria. Currently in
Algeria, indigenous lactic flora of local traditional products has given a considerable interest.
Thirty lactic acid bacteria were isolated, purified and characterized from traditionally
manufactured raw butter in laboratory using cow's milk from El-Eulma municipality (wilaya
of Setif). These strains belong to five genera: Enterococcus (40%), Lactococcus (17%),
Streptococcus (17%), Leuconostoc (13%), and Lactobacillus (13%). characterization with
biochemical Gallery API 50 CH has classified the strains within the following species:
Leuconostoc mesenteroides ssp. Mesenteroides, Lactococcus lactis ssp. Diacetylactis,
Leuconostoc lactis, Lactobacillus delbrueckii ssp. Lactis and Lactococcus lactis ssp. Lactis.
The results of the evaluation of the technological ability of pure cultures and mixed starters
demonstrate a good proteolytic activity, flavouring, texturizing, and antibacterial.
The application of reconstituted mixed starters in sour cream manufacturing revealed a better
hygienic quality that meets national and international standards.
Diplôme : Magistère En ligne : ../theses/agronomie/LAT6830.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10122 Caractérisation des bactéries lactiques isolées du beurre cru, évaluation de leurs aptitudes technologiques et leur utilisation dans la fabrication de la crème sure [texte imprimé] / Bilal Latreche, Auteur ; Karima Kharroub, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 130 f. ; 30 cm.
2 copies imprimes disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Technologie alimentaire Bactérie lactique beurre cru ferments mixtes aptitudes technologiques crème sure lactic acid bacteria raw butter mixed starters technological ability sour cream البكتریا اللبنية زبدة البقر خميرة لبنية القابلية التكنولوجية قشدة الحليب الحامضة Index. décimale : 640 Industrie Alimentaire Résumé : Dairy products are considered to be a good source of lactic acid bacteria. Currently in
Algeria, indigenous lactic flora of local traditional products has given a considerable interest.
Thirty lactic acid bacteria were isolated, purified and characterized from traditionally
manufactured raw butter in laboratory using cow's milk from El-Eulma municipality (wilaya
of Setif). These strains belong to five genera: Enterococcus (40%), Lactococcus (17%),
Streptococcus (17%), Leuconostoc (13%), and Lactobacillus (13%). characterization with
biochemical Gallery API 50 CH has classified the strains within the following species:
Leuconostoc mesenteroides ssp. Mesenteroides, Lactococcus lactis ssp. Diacetylactis,
Leuconostoc lactis, Lactobacillus delbrueckii ssp. Lactis and Lactococcus lactis ssp. Lactis.
The results of the evaluation of the technological ability of pure cultures and mixed starters
demonstrate a good proteolytic activity, flavouring, texturizing, and antibacterial.
The application of reconstituted mixed starters in sour cream manufacturing revealed a better
hygienic quality that meets national and international standards.
Diplôme : Magistère En ligne : ../theses/agronomie/LAT6830.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10122 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAT/6830 LAT/6830 Thèse Bibliothèque principale Thèses Disponible
Titre : Produits carnés traditionnels : caractérisation physicochimique et microbiologique d’El-Guedid algérien issu de différents types de viandes et régions. Type de document : texte imprimé Auteurs : Roumeila Bader, Auteur ; Samira Becila-Hioual, Directeur de thèse Mention d'édition : 25/03/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 185 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
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Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Biotechnologie :science Alimentaire El-Guedid produit carné traditionnel bactéries lactiques staphylocoques à coagulase négative traditional meat product lactic acid bacteria coagulase negative staphylococci القديد منتج لحوم مجففة بكتيريا حمض اللاكتيك ) (LAB المكورات العنقودية السلبية المخثرة )(SC Index. décimale : 640 Industrie Alimentaire Résumé :
In Algeria, very few studies have been carried out on traditional meat products. Our thesis work focused on the characterization and preservation of Algerian regional products including meat products. Among these products, we find El-Guedid, a traditional Algerian meat product that is prepared from red meats. It belongs to the great diversity of salted / dried meat products. In this research work, different samples of El-Guedid, prepared in a traditional way in different households, from four types of meat (sheep, beef, goat and camel), in 04 different area of Algeria: Constantine, Algiers, Oum El Bouaghi and Ouargla respectively, were characterized. This study described the physico-chemical and microbiological properties of different samples. Our objectives are to perform a microbiological and physico-chemical characterization during the ripening process of El-Guedid; study the effect of time and type of meat on physicochemical parameters, the intervention of flora from different ecosystems in the quality of the final product. The results indicated that these products were mainly characterized by low moisture content with an average decrease in water content between 15.6% and 16.3% for all samples, and a decrease in water activity (Aw) ranging from 0.66 to 0.68, while the salt content varied from 8.8 to 19.3%. Decrease in pH values ranged from (6.3 - 6.4) to (5.2 -5.5) at T0 and T365 consecutively, in all samples. Microbial analyzes revealed the absence of pathogenic bacteria such as Listeria and Salmonella but sporadic contamination by Staphylococcus aureus up to one month of ripening. Lactic acid bacteria and coagulase negative staphylococci were the populations of potential technological interest of El-Guedid that persisted and were dominant with Leuconostoc mesenteroides, Lactobacillus sakei and Staphylococcus saprophyticus as the main species identified. All of these populations decreased during the process and reached low levels (2 log CFU / g) at the end of storage (365 days). Drastic drying of El-Guedid led to a safe traditional meat product that could aid its production.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/agronomie/BAD7719.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11553 Produits carnés traditionnels : caractérisation physicochimique et microbiologique d’El-Guedid algérien issu de différents types de viandes et régions. [texte imprimé] / Roumeila Bader, Auteur ; Samira Becila-Hioual, Directeur de thèse . - 25/03/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 185 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Biotechnologie :science Alimentaire El-Guedid produit carné traditionnel bactéries lactiques staphylocoques à coagulase négative traditional meat product lactic acid bacteria coagulase negative staphylococci القديد منتج لحوم مجففة بكتيريا حمض اللاكتيك ) (LAB المكورات العنقودية السلبية المخثرة )(SC Index. décimale : 640 Industrie Alimentaire Résumé :
In Algeria, very few studies have been carried out on traditional meat products. Our thesis work focused on the characterization and preservation of Algerian regional products including meat products. Among these products, we find El-Guedid, a traditional Algerian meat product that is prepared from red meats. It belongs to the great diversity of salted / dried meat products. In this research work, different samples of El-Guedid, prepared in a traditional way in different households, from four types of meat (sheep, beef, goat and camel), in 04 different area of Algeria: Constantine, Algiers, Oum El Bouaghi and Ouargla respectively, were characterized. This study described the physico-chemical and microbiological properties of different samples. Our objectives are to perform a microbiological and physico-chemical characterization during the ripening process of El-Guedid; study the effect of time and type of meat on physicochemical parameters, the intervention of flora from different ecosystems in the quality of the final product. The results indicated that these products were mainly characterized by low moisture content with an average decrease in water content between 15.6% and 16.3% for all samples, and a decrease in water activity (Aw) ranging from 0.66 to 0.68, while the salt content varied from 8.8 to 19.3%. Decrease in pH values ranged from (6.3 - 6.4) to (5.2 -5.5) at T0 and T365 consecutively, in all samples. Microbial analyzes revealed the absence of pathogenic bacteria such as Listeria and Salmonella but sporadic contamination by Staphylococcus aureus up to one month of ripening. Lactic acid bacteria and coagulase negative staphylococci were the populations of potential technological interest of El-Guedid that persisted and were dominant with Leuconostoc mesenteroides, Lactobacillus sakei and Staphylococcus saprophyticus as the main species identified. All of these populations decreased during the process and reached low levels (2 log CFU / g) at the end of storage (365 days). Drastic drying of El-Guedid led to a safe traditional meat product that could aid its production.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/agronomie/BAD7719.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11553 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BAD/7719 BAD/7719 Thèse Bibliothèque principale Thèses Disponible
