Jamal S. Haddadin - Academia.edu (original) (raw)

Papers by Jamal S. Haddadin

Enzyme and microbial technology, Oct 1, 1993

Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1,... more Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1, P2, and P3) involved in bioleaching was studied on synthetic and pyritic medium. The behavior of these three populations was not identical in the presence of different concentrations of CO 2 . At 0.03% in CO 2 , P1 and P2 were the first populations to start growth in the reactor. They grew rapidly at first but immediately after showed a rapid decline, regardless of the medium; at 2 and 4% CO 2 , we could observe a decrease in the initial number of the P1 and P2 cells throughout the experiments. When the biomass concentration of the P1 and P2 populations became negligible in the medium, it was always the turn of the P3 population to grow. The results show that P3 was the dominant population in all the experiments and was mainly responsible for ferrous iron and pyrite oxidation. However, its growth was dependent upon the CO 2 concentration in the medium. At 2% CO 2 , the P3 population showed a maximal biomass concentration higher than that obtained for 0.03 and 4% in CO 2 in the two media.

Current research in nutrition and food science, Apr 25, 2023

This study was conducted to contribute to the national approach to achieving food security in Sau... more This study was conducted to contribute to the national approach to achieving food security in Saudi Arabia, which is one of the world's largest producer of dates. Studying the chemical properties of the most commercial date’s fruits cultivar in the eastern region will contribute to understanding to industrial potential Khalas dates. This is in addition to developing a method for extracting date syrup (DS) in a way that preserves as much nutritional properties as possible. Date fruits (DF) flesh and water mixture at a 1:3 ratio gave 18% total soluble solids (TSS) then concentrated to 70° Brix. The used date flesh to water ratio recaptured all sugars, acetic, butyric and propionic acids in DS. Sugars were the major components amounting 34.3 and 32.6% glucose and fructose, respectively. No crude or dietary fibers were present in DS due to their insolubility in water. In contrast, the major portion of minerals was recovered in DS. In the same way, 60% and 4.9% of the fat and protein respectively were recovered in the DS. It also notes that the main amino acid in DS is glutamic acid which represents 16.25 % of the total detected amino acids. In concentrated DS a total polyphenol (PP) tenor of 1448.65 mg/100 g gallic acid equivalent (GAE) was recovered. The presence of large amounts of PP in DS compared to whole dates can be explained by the use of high temperature DS extraction with vacuum evaporation of excess water. Crude and dietary fibers were the major components in date pits (DP) representing 24.1% and 56.1% respectively. Fat and sucrose were also present in a significant portion in DP showing 5.9% and 2.4%, respectively. Therefore, the results obtained will serve many food and nutrition industries as well as the pharmaceutical and therapeutic industries.

La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'i... more La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'industrie metallurgique, celle-ci est utilisee pour la recuperation des metaux par lessivage, utilisant les capacites que possedent certains micro-organismes a solubiliser les metaux. Ce travail est divise en quatre sections: premierement, nous avons identifie la composition microbiologique de la culture mixte en notre possession. Cette culture mixte est composee de trois populations bacteriennes. Deuxiemement, nous avons etudie l'influence de certains parametres physico-chimiques tels que le pH, la temperature, la concentration en CO2, le taux de solides et l'ajout de Fe3+ au milieu reactionnel sur la cinetique de la biolixiviation, en culture discontinue. Ces etudes ont notamment conduit a la determination d'un pH (1. 75), d'une temperature (32-37°C) et d'une concentration en CO2 (0,03 et 2% v/v) optimaux pour ce procede. Troisiemement, nous avons compare differents systemes reactionnels (air-lift, lit fluidise et mecaniquement agite) pour aider au choix d'une future technologie alternative. Notre derniere contribution a porte sur l'etude de la capacite de la culture mixte a oxyder des dechets industriels contenant de l'antimoine, en culture discontinue. Nous avons etudie le role important de l'interaction galvanique entre la pyrite et les residus antimonies sur la recuperation de l'antimoine

Enzyme and microbial technology, Apr 1, 1995

Italian Journal of Food Science, 2010

Egyptian Journal of Agricultural Sciences, Apr 1, 2008

Contents 1. Introduction 2. Term of definition 2.1. Functional food 2.2. Probiotics 2.3. Prebioti... more Contents 1. Introduction 2. Term of definition 2.1. Functional food 2.2. Probiotics 2.3. Prebiotics 2.4. Fermentation 3. Application of probiotics 4. Identification and differentiation of probiotics 5. Conclusion 6. References This review focuses on the role of microorganisms as probiotics which when administrated in adequate amount confer a benefit to human health such as: normalization of the intestinal microflora, ability to block the invasion of potential pathogens in the gut, amelioration of lactose intolerance, prevention of colon cancer, reduction of blood cholesterol levels and many others. Identification and differentiation of probiotics are also reviewed in this article.

Egyptian Journal of Agricultural Sciences, 2009

Three local strains of Saccharomyces cerevisiae (Sc 1, Sc 2 and Sc 3) and one strain of Kluyverom... more Three local strains of Saccharomyces cerevisiae (Sc 1, Sc 2 and Sc 3) and one strain of Kluyveromyces marxianus were used as pure or mixed cultures in a commercial medium, in order to compare their kinetic parameters and fermentation patterns. It was found that S. cerevisiae Sc 3 had the highest maximum specific growth rates on glucose (0.32 h-1) and on ethanol (0.11h-1). The yields of biomasses on glucose and on ethanol were the most important. A low yield of ethanol on glucose 0.33 (g/g) was obtained. Kinetic studies of continuous production of biomass from a mixture of whey permeate and starch hydrolysates using mixed culture of Saccharomyces cerevisiae Sc 3 and Kluyveromyces marxianus were performed. In the course of continuous culture on mixed substrate of whey permeate and starch hydrolysates "A", Kluyveromyces marxianus overgrew Saccharomyces cerevisiae. Whereas in the course of continuous culture on mixed substrate of whey permeate and starch hydrolysates "B" there was a stabilization of the coculture (Saccharomyces cerevisiae Sc 3 and Kluyveromyces marxianus).

Pakistan Journal of Nutrition, Nov 15, 2015

Polish Journal of Food and Nutrition Sciences, Dec 31, 2012

The present study was done to evaluate the effect of three different royal jelly samples on the k... more The present study was done to evaluate the effect of three different royal jelly samples on the kinetic growth of two isolates of lactic bacteria; Lactobacillus acidophilus and Bifi dobacterium bifi dum. The results showed that the addition of royal jelly supported and improved the growth of L. acidophilus and B. bifi dum. The highest count of L. acidophilus was 9.01 (log 10 cfu/mL) when 2% (w/v) of the royal jelly sample 3 was added to milk. The highest count of B. bifi dum was 9.07 (log 10 cfu/mL) when 5% (w/v) of the royal jelly sample 1 was added to milk. Based on the obtained results, royal jelly showed the capability of prebiotic activity and increasing the activity of L. acidophilus and B. bifi dum. Royal jelly promotes SCFAs productions which are believed to have an antitumor effect. The results showed the presence of signifi cant synbiotic effect of fermented milk and royal jelly on the intestinal microfl ora. This effect is translated by the reduction in the faecal enzyme activities of β-glucuronidase, arylsulphatase, and β-gluconsidase which are involved in colon carcinogenesis.

International Journal of Biology and Biotechnology, 2016

Polyphenols, flavonoids, and tannins of Nabali Baladi olive leaves were extracted by using four d... more Polyphenols, flavonoids, and tannins of Nabali Baladi olive leaves were extracted by using four different solvents (80 % methanol, 80 % ethanol, acetone, and distilled water). The total polyphenols were in the range of 158-392 mg gallic acid equivalent (GAE.g-1 extract, the total flavonoids were 11-71 mg rutin equivalent.g-1 extract, and the total tannins were 8-18 mg GAE.g-1 extract. The highest value of extraction was obtained with 80 % methanol and the lowest one was obtained with the distilled water. The antioxidant activity of the 80% ethanol olive leaf extract (OLE) was tested using DPPH (1,1-Diphenyl-2-Picryl-Hydrazyl) free radical scavenging activity, total antioxidant activity in the linoleic acid system, and protein oxidation by measuring the carbonyl content. The free radical scavenging activity of the 40-2800 µg OLE.mL-1 ranged between 9.62-93.15 %, with IC50 at 1082.35 µg.mL-1. Inhibition of peroxides formation in the linoleic acid system reached 76.36 % using 2400 µg OLE.mL-1 after incubation for 108 hours. Inhibition of protein oxidation was 70.80-97.33 % using 50-2400 µg OLE.mL-1. These results indicate the capacity of the Nabali Baladi OLE against lipid and protein oxidation, as well as the formation of free radicals which were dose dependent.

Pakistan Journal of Biological Sciences, Dec 15, 2015

Current Research in Nutrition and Food Science Journal

This study was conducted to contribute to the national approach to achieving food security in Sau... more This study was conducted to contribute to the national approach to achieving food security in Saudi Arabia, which is one of the world's largest producer of dates. Studying the chemical properties of the most commercial date’s fruits cultivar in the eastern region will contribute to understanding to industrial potential Khalas dates. This is in addition to developing a method for extracting date syrup (DS) in a way that preserves as much nutritional properties as possible. Date fruits (DF) flesh and water mixture at a 1:3 ratio gave 18% total soluble solids (TSS) then concentrated to 70° Brix. The used date flesh to water ratio recaptured all sugars, acetic, butyric and propionic acids in DS. Sugars were the major components amounting 34.3 and 32.6% glucose and fructose, respectively. No crude or dietary fibers were present in DS due to their insolubility in water. In contrast, the major portion of minerals was recovered in DS. In the same way, 60% and 4.9% of the fat and protein...

Http Www Theses Fr, 1995

La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'i... more La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'industrie metallurgique, celle-ci est utilisee pour la recuperation des metaux par lessivage, utilisant les capacites que possedent certains micro-organismes a solubiliser les metaux. Ce travail est divise en quatre sections: premierement, nous avons identifie la composition microbiologique de la culture mixte en notre possession. Cette culture mixte est composee de trois populations bacteriennes. Deuxiemement, nous avons etudie l'influence de certains parametres physico-chimiques tels que le pH, la temperature, la concentration en CO2, le taux de solides et l'ajout de Fe3+ au milieu reactionnel sur la cinetique de la biolixiviation, en culture discontinue. Ces etudes ont notamment conduit a la determination d'un pH (1. 75), d'une temperature (32-37°C) et d'une concentration en CO2 (0,03 et 2% v/v) optimaux pour ce procede. Troisiemement, nous avons compare differents systemes reactionnels (air-lift, lit fluidise et mecaniquement agite) pour aider au choix d'une future technologie alternative. Notre derniere contribution a porte sur l'etude de la capacite de la culture mixte a oxyder des dechets industriels contenant de l'antimoine, en culture discontinue. Nous avons etudie le role important de l'interaction galvanique entre la pyrite et les residus antimonies sur la recuperation de l'antimoine

Jordan Journal of Agricultural Sciences, Jun 20, 2010

Technological performances of three bacterial isolates belonging to the family of heterofermentat... more Technological performances of three bacterial isolates belonging to the family of heterofermentative lactobacilli: Lactobacillus brevis, Lactobacillus buchneri and Lactobacillus fermentum and one isolate belonging to the family of homofermentative lactobacilli; Streptococcus thermophilus on synthetic media and on milk cows have been studied. The results of this study did not highlight a synergistic effect; however, the acidification was improved in cocultures of S. thermophilus and Lb. fermentum in MRS lactose broth at 37°C. These studies indicated that the acidification of the added sucrose to the synthetic medium was mainly by the lactobacilli. This indicated that there was no improvement of the culture acidification by S. thermophilus. Cluster analysis of the sensorial assessment of the milk fermented by the pure or mixed cultures showed important organoleptic properties' variations. The results carried out permit to suggest many technological performances that can be used by the dairy industries to produce new products or to improve the taste, color or texture of the existent products.

Pakistan Journal of Nutrition, 2015

Polish Journal of Food and Nutrition Sciences, 2014

This study was carried out to investigate the antioxidant properties of synbiotic product, Lactob... more This study was carried out to investigate the antioxidant properties of synbiotic product, Lactobacillus acidophilus supplemented with 2.5% royal jelly in skim milk and Bifidobacterium bifidum supplemented with 7.5% royal jelly in skim milk, using DPPH (1,1-Diphenyl-2-picrylhydrazyl) radical scavenging assay, reducing power, total antioxidant in linoleic acid system and formation of diene-conjugation assay. Results showed that the synbiotic effect of royal jelly and probiotic bacteria provided substantial antioxidant activities. Milk samples fermented by B. bifi dum supplemented with 7.5% royal jelly and L. acidophilus supplemented with 2.5% royal jelly exhibited high scavenging activity with 96.8 and 93.3%, respectively, at a concentration of 500 μg/mL. IC50 values were estimated at 226.7 μg/mL for B. bifidum supplemented with 7.5% royal jelly and at 210.2 μg/ml for L. acidophilus supplemented with 2.5% royal jelly. On the other hand, L. acidophilus supplemented with 2.5% royal jel...

Polish Journal of Food and Nutrition Sciences, 2012

The present study was done to evaluate the effect of three different royal jelly samples on the k... more The present study was done to evaluate the effect of three different royal jelly samples on the kinetic growth of two isolates of lactic bacteria; Lactobacillusacidophilus and Bifidobacterium bifidum. The results showed that the addition of royal jelly supported and improved the growth of L. acidophilus and B. bifidum. The highest count of L. acidophilus was 9.01 (log10 cfu/mL) when 2% (w/v) of the royal jelly sample 3 was added to milk. The highest count of B. bifidum was 9.07 (log10 cfu/mL) when 5% (w/v) of the royal jelly sample 1 was added to milk. Based on the obtained results, royal jelly showed the capability of prebiotic activity and increasing the activity of L. acidophilus and B. bifidum. Royal jelly promotes SCFAs productions which are believed to have an antitumor effect. The results showed the presence of signifi cant synbiotic effect of fermented milk and royal jelly on the intestinal microflora. This effect is translated by the reduction in the faecal enzyme activitie...

Pakistan Journal of Nutrition, 2005

Enzyme and Microbial Technology, 1995

Enzyme and Microbial Technology, 1993

Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1,... more Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1, P2, and P3) involved in bioleaching was studied on synthetic and pyritic medium. The behavior of these three populations was not identical in the presence of different concentrations of CO 2 . At 0.03% in CO 2 , P1 and P2 were the first populations to start growth in the reactor. They grew rapidly at first but immediately after showed a rapid decline, regardless of the medium; at 2 and 4% CO 2 , we could observe a decrease in the initial number of the P1 and P2 cells throughout the experiments. When the biomass concentration of the P1 and P2 populations became negligible in the medium, it was always the turn of the P3 population to grow. The results show that P3 was the dominant population in all the experiments and was mainly responsible for ferrous iron and pyrite oxidation. However, its growth was dependent upon the CO 2 concentration in the medium. At 2% CO 2 , the P3 population showed a maximal biomass concentration higher than that obtained for 0.03 and 4% in CO 2 in the two media.

Enzyme and microbial technology, Oct 1, 1993

Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1,... more Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1, P2, and P3) involved in bioleaching was studied on synthetic and pyritic medium. The behavior of these three populations was not identical in the presence of different concentrations of CO 2 . At 0.03% in CO 2 , P1 and P2 were the first populations to start growth in the reactor. They grew rapidly at first but immediately after showed a rapid decline, regardless of the medium; at 2 and 4% CO 2 , we could observe a decrease in the initial number of the P1 and P2 cells throughout the experiments. When the biomass concentration of the P1 and P2 populations became negligible in the medium, it was always the turn of the P3 population to grow. The results show that P3 was the dominant population in all the experiments and was mainly responsible for ferrous iron and pyrite oxidation. However, its growth was dependent upon the CO 2 concentration in the medium. At 2% CO 2 , the P3 population showed a maximal biomass concentration higher than that obtained for 0.03 and 4% in CO 2 in the two media.

Current research in nutrition and food science, Apr 25, 2023

This study was conducted to contribute to the national approach to achieving food security in Sau... more This study was conducted to contribute to the national approach to achieving food security in Saudi Arabia, which is one of the world's largest producer of dates. Studying the chemical properties of the most commercial date’s fruits cultivar in the eastern region will contribute to understanding to industrial potential Khalas dates. This is in addition to developing a method for extracting date syrup (DS) in a way that preserves as much nutritional properties as possible. Date fruits (DF) flesh and water mixture at a 1:3 ratio gave 18% total soluble solids (TSS) then concentrated to 70° Brix. The used date flesh to water ratio recaptured all sugars, acetic, butyric and propionic acids in DS. Sugars were the major components amounting 34.3 and 32.6% glucose and fructose, respectively. No crude or dietary fibers were present in DS due to their insolubility in water. In contrast, the major portion of minerals was recovered in DS. In the same way, 60% and 4.9% of the fat and protein respectively were recovered in the DS. It also notes that the main amino acid in DS is glutamic acid which represents 16.25 % of the total detected amino acids. In concentrated DS a total polyphenol (PP) tenor of 1448.65 mg/100 g gallic acid equivalent (GAE) was recovered. The presence of large amounts of PP in DS compared to whole dates can be explained by the use of high temperature DS extraction with vacuum evaporation of excess water. Crude and dietary fibers were the major components in date pits (DP) representing 24.1% and 56.1% respectively. Fat and sucrose were also present in a significant portion in DP showing 5.9% and 2.4%, respectively. Therefore, the results obtained will serve many food and nutrition industries as well as the pharmaceutical and therapeutic industries.

La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'i... more La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'industrie metallurgique, celle-ci est utilisee pour la recuperation des metaux par lessivage, utilisant les capacites que possedent certains micro-organismes a solubiliser les metaux. Ce travail est divise en quatre sections: premierement, nous avons identifie la composition microbiologique de la culture mixte en notre possession. Cette culture mixte est composee de trois populations bacteriennes. Deuxiemement, nous avons etudie l'influence de certains parametres physico-chimiques tels que le pH, la temperature, la concentration en CO2, le taux de solides et l'ajout de Fe3+ au milieu reactionnel sur la cinetique de la biolixiviation, en culture discontinue. Ces etudes ont notamment conduit a la determination d'un pH (1. 75), d'une temperature (32-37°C) et d'une concentration en CO2 (0,03 et 2% v/v) optimaux pour ce procede. Troisiemement, nous avons compare differents systemes reactionnels (air-lift, lit fluidise et mecaniquement agite) pour aider au choix d'une future technologie alternative. Notre derniere contribution a porte sur l'etude de la capacite de la culture mixte a oxyder des dechets industriels contenant de l'antimoine, en culture discontinue. Nous avons etudie le role important de l'interaction galvanique entre la pyrite et les residus antimonies sur la recuperation de l'antimoine

Enzyme and microbial technology, Apr 1, 1995

Italian Journal of Food Science, 2010

Egyptian Journal of Agricultural Sciences, Apr 1, 2008

Contents 1. Introduction 2. Term of definition 2.1. Functional food 2.2. Probiotics 2.3. Prebioti... more Contents 1. Introduction 2. Term of definition 2.1. Functional food 2.2. Probiotics 2.3. Prebiotics 2.4. Fermentation 3. Application of probiotics 4. Identification and differentiation of probiotics 5. Conclusion 6. References This review focuses on the role of microorganisms as probiotics which when administrated in adequate amount confer a benefit to human health such as: normalization of the intestinal microflora, ability to block the invasion of potential pathogens in the gut, amelioration of lactose intolerance, prevention of colon cancer, reduction of blood cholesterol levels and many others. Identification and differentiation of probiotics are also reviewed in this article.

Egyptian Journal of Agricultural Sciences, 2009

Three local strains of Saccharomyces cerevisiae (Sc 1, Sc 2 and Sc 3) and one strain of Kluyverom... more Three local strains of Saccharomyces cerevisiae (Sc 1, Sc 2 and Sc 3) and one strain of Kluyveromyces marxianus were used as pure or mixed cultures in a commercial medium, in order to compare their kinetic parameters and fermentation patterns. It was found that S. cerevisiae Sc 3 had the highest maximum specific growth rates on glucose (0.32 h-1) and on ethanol (0.11h-1). The yields of biomasses on glucose and on ethanol were the most important. A low yield of ethanol on glucose 0.33 (g/g) was obtained. Kinetic studies of continuous production of biomass from a mixture of whey permeate and starch hydrolysates using mixed culture of Saccharomyces cerevisiae Sc 3 and Kluyveromyces marxianus were performed. In the course of continuous culture on mixed substrate of whey permeate and starch hydrolysates "A", Kluyveromyces marxianus overgrew Saccharomyces cerevisiae. Whereas in the course of continuous culture on mixed substrate of whey permeate and starch hydrolysates "B" there was a stabilization of the coculture (Saccharomyces cerevisiae Sc 3 and Kluyveromyces marxianus).

Pakistan Journal of Nutrition, Nov 15, 2015

Polish Journal of Food and Nutrition Sciences, Dec 31, 2012

The present study was done to evaluate the effect of three different royal jelly samples on the k... more The present study was done to evaluate the effect of three different royal jelly samples on the kinetic growth of two isolates of lactic bacteria; Lactobacillus acidophilus and Bifi dobacterium bifi dum. The results showed that the addition of royal jelly supported and improved the growth of L. acidophilus and B. bifi dum. The highest count of L. acidophilus was 9.01 (log 10 cfu/mL) when 2% (w/v) of the royal jelly sample 3 was added to milk. The highest count of B. bifi dum was 9.07 (log 10 cfu/mL) when 5% (w/v) of the royal jelly sample 1 was added to milk. Based on the obtained results, royal jelly showed the capability of prebiotic activity and increasing the activity of L. acidophilus and B. bifi dum. Royal jelly promotes SCFAs productions which are believed to have an antitumor effect. The results showed the presence of signifi cant synbiotic effect of fermented milk and royal jelly on the intestinal microfl ora. This effect is translated by the reduction in the faecal enzyme activities of β-glucuronidase, arylsulphatase, and β-gluconsidase which are involved in colon carcinogenesis.

International Journal of Biology and Biotechnology, 2016

Polyphenols, flavonoids, and tannins of Nabali Baladi olive leaves were extracted by using four d... more Polyphenols, flavonoids, and tannins of Nabali Baladi olive leaves were extracted by using four different solvents (80 % methanol, 80 % ethanol, acetone, and distilled water). The total polyphenols were in the range of 158-392 mg gallic acid equivalent (GAE.g-1 extract, the total flavonoids were 11-71 mg rutin equivalent.g-1 extract, and the total tannins were 8-18 mg GAE.g-1 extract. The highest value of extraction was obtained with 80 % methanol and the lowest one was obtained with the distilled water. The antioxidant activity of the 80% ethanol olive leaf extract (OLE) was tested using DPPH (1,1-Diphenyl-2-Picryl-Hydrazyl) free radical scavenging activity, total antioxidant activity in the linoleic acid system, and protein oxidation by measuring the carbonyl content. The free radical scavenging activity of the 40-2800 µg OLE.mL-1 ranged between 9.62-93.15 %, with IC50 at 1082.35 µg.mL-1. Inhibition of peroxides formation in the linoleic acid system reached 76.36 % using 2400 µg OLE.mL-1 after incubation for 108 hours. Inhibition of protein oxidation was 70.80-97.33 % using 50-2400 µg OLE.mL-1. These results indicate the capacity of the Nabali Baladi OLE against lipid and protein oxidation, as well as the formation of free radicals which were dose dependent.

Pakistan Journal of Biological Sciences, Dec 15, 2015

Current Research in Nutrition and Food Science Journal

This study was conducted to contribute to the national approach to achieving food security in Sau... more This study was conducted to contribute to the national approach to achieving food security in Saudi Arabia, which is one of the world's largest producer of dates. Studying the chemical properties of the most commercial date’s fruits cultivar in the eastern region will contribute to understanding to industrial potential Khalas dates. This is in addition to developing a method for extracting date syrup (DS) in a way that preserves as much nutritional properties as possible. Date fruits (DF) flesh and water mixture at a 1:3 ratio gave 18% total soluble solids (TSS) then concentrated to 70° Brix. The used date flesh to water ratio recaptured all sugars, acetic, butyric and propionic acids in DS. Sugars were the major components amounting 34.3 and 32.6% glucose and fructose, respectively. No crude or dietary fibers were present in DS due to their insolubility in water. In contrast, the major portion of minerals was recovered in DS. In the same way, 60% and 4.9% of the fat and protein...

Http Www Theses Fr, 1995

La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'i... more La lixiviation bacterienne est l'application biotechnologique la plus importante dans l'industrie metallurgique, celle-ci est utilisee pour la recuperation des metaux par lessivage, utilisant les capacites que possedent certains micro-organismes a solubiliser les metaux. Ce travail est divise en quatre sections: premierement, nous avons identifie la composition microbiologique de la culture mixte en notre possession. Cette culture mixte est composee de trois populations bacteriennes. Deuxiemement, nous avons etudie l'influence de certains parametres physico-chimiques tels que le pH, la temperature, la concentration en CO2, le taux de solides et l'ajout de Fe3+ au milieu reactionnel sur la cinetique de la biolixiviation, en culture discontinue. Ces etudes ont notamment conduit a la determination d'un pH (1. 75), d'une temperature (32-37°C) et d'une concentration en CO2 (0,03 et 2% v/v) optimaux pour ce procede. Troisiemement, nous avons compare differents systemes reactionnels (air-lift, lit fluidise et mecaniquement agite) pour aider au choix d'une future technologie alternative. Notre derniere contribution a porte sur l'etude de la capacite de la culture mixte a oxyder des dechets industriels contenant de l'antimoine, en culture discontinue. Nous avons etudie le role important de l'interaction galvanique entre la pyrite et les residus antimonies sur la recuperation de l'antimoine

Jordan Journal of Agricultural Sciences, Jun 20, 2010

Technological performances of three bacterial isolates belonging to the family of heterofermentat... more Technological performances of three bacterial isolates belonging to the family of heterofermentative lactobacilli: Lactobacillus brevis, Lactobacillus buchneri and Lactobacillus fermentum and one isolate belonging to the family of homofermentative lactobacilli; Streptococcus thermophilus on synthetic media and on milk cows have been studied. The results of this study did not highlight a synergistic effect; however, the acidification was improved in cocultures of S. thermophilus and Lb. fermentum in MRS lactose broth at 37°C. These studies indicated that the acidification of the added sucrose to the synthetic medium was mainly by the lactobacilli. This indicated that there was no improvement of the culture acidification by S. thermophilus. Cluster analysis of the sensorial assessment of the milk fermented by the pure or mixed cultures showed important organoleptic properties' variations. The results carried out permit to suggest many technological performances that can be used by the dairy industries to produce new products or to improve the taste, color or texture of the existent products.

Pakistan Journal of Nutrition, 2015

Polish Journal of Food and Nutrition Sciences, 2014

This study was carried out to investigate the antioxidant properties of synbiotic product, Lactob... more This study was carried out to investigate the antioxidant properties of synbiotic product, Lactobacillus acidophilus supplemented with 2.5% royal jelly in skim milk and Bifidobacterium bifidum supplemented with 7.5% royal jelly in skim milk, using DPPH (1,1-Diphenyl-2-picrylhydrazyl) radical scavenging assay, reducing power, total antioxidant in linoleic acid system and formation of diene-conjugation assay. Results showed that the synbiotic effect of royal jelly and probiotic bacteria provided substantial antioxidant activities. Milk samples fermented by B. bifi dum supplemented with 7.5% royal jelly and L. acidophilus supplemented with 2.5% royal jelly exhibited high scavenging activity with 96.8 and 93.3%, respectively, at a concentration of 500 μg/mL. IC50 values were estimated at 226.7 μg/mL for B. bifidum supplemented with 7.5% royal jelly and at 210.2 μg/ml for L. acidophilus supplemented with 2.5% royal jelly. On the other hand, L. acidophilus supplemented with 2.5% royal jel...

Polish Journal of Food and Nutrition Sciences, 2012

The present study was done to evaluate the effect of three different royal jelly samples on the k... more The present study was done to evaluate the effect of three different royal jelly samples on the kinetic growth of two isolates of lactic bacteria; Lactobacillusacidophilus and Bifidobacterium bifidum. The results showed that the addition of royal jelly supported and improved the growth of L. acidophilus and B. bifidum. The highest count of L. acidophilus was 9.01 (log10 cfu/mL) when 2% (w/v) of the royal jelly sample 3 was added to milk. The highest count of B. bifidum was 9.07 (log10 cfu/mL) when 5% (w/v) of the royal jelly sample 1 was added to milk. Based on the obtained results, royal jelly showed the capability of prebiotic activity and increasing the activity of L. acidophilus and B. bifidum. Royal jelly promotes SCFAs productions which are believed to have an antitumor effect. The results showed the presence of signifi cant synbiotic effect of fermented milk and royal jelly on the intestinal microflora. This effect is translated by the reduction in the faecal enzyme activitie...

Pakistan Journal of Nutrition, 2005

Enzyme and Microbial Technology, 1995

Enzyme and Microbial Technology, 1993

Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1,... more Abstract In batch systems, the effect of CO 2 on the kinetics of three bacterial populations (P1, P2, and P3) involved in bioleaching was studied on synthetic and pyritic medium. The behavior of these three populations was not identical in the presence of different concentrations of CO 2 . At 0.03% in CO 2 , P1 and P2 were the first populations to start growth in the reactor. They grew rapidly at first but immediately after showed a rapid decline, regardless of the medium; at 2 and 4% CO 2 , we could observe a decrease in the initial number of the P1 and P2 cells throughout the experiments. When the biomass concentration of the P1 and P2 populations became negligible in the medium, it was always the turn of the P3 population to grow. The results show that P3 was the dominant population in all the experiments and was mainly responsible for ferrous iron and pyrite oxidation. However, its growth was dependent upon the CO 2 concentration in the medium. At 2% CO 2 , the P3 population showed a maximal biomass concentration higher than that obtained for 0.03 and 4% in CO 2 in the two media.