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Antibacterial and Cytotoxicity Functions of Pomegranate Peel Extracts in Fish Processing Texto completo
2024
Ahmed, Eman | Eweda, Wedad | Amin, Shimaa | Ahmed, Rania
Antibacterial and Cytotoxicity Functions of Pomegranate Peel Extracts in Fish Processing Texto completo
2024
Ahmed, Eman | Eweda, Wedad | Amin, Shimaa | Ahmed, Rania
Pomegranate peel extracts, both ethanolic (PPE) and aqueous (PPA), demonstrated a broad spectrum of antibacterial action against Gr+ve and Gr-ve bacteria, with bacterial isolate B2 (G+ve cocci) having the maximum inhibition zone (IZ) 10.5–26.5 mm at concentrations 4.2 mg mL-1 to 267 mg mL-1. PPE's minimum inhibitory concentration (MIC) varies among bacterial strains, with the lowest being 8.3 mg mL-1. Ball-milled nano-scale pomegranate peel (NSPP) with 89.09 nm particle increased IZ 3-fold and decreased MIC significantly. MTT was used to assess the NSPPE's cytotoxicity against the Vero normal kidney and caco cell lines. At lower doses, NSPPE was safe, but increasing concentrations gradually lethal against Vero normal kidney cell line. NSPPE was highly toxic to caco cells, with an IC50 339.76±13.9 µg mL-1. Fish kofta samples treated with NSPPE were completely free of Escherichia coli and Staphylococcus aureus after 8 weeks of storage. This study demonstrates that NSPPE may improve fish food safety and shelf life as a natural preservative.
Mostrar más [+] Menos [-]Antibacterial and Cytotoxicity Functions of Pomegranate Peel Extracts in Fish Processing Texto completo
2024
Eman Ahmed | Wedad Eweda | Shimaa Amin | Rania Ahmed
Pomegranate peel extracts, both ethanolic (PPE) and aqueous (PPA), demonstrated a broad spectrum of antibacterial action against Gr+ve and Gr-ve bacteria, with bacterial isolate B2 (G+ve cocci) having the maximum inhibition zone (IZ) 10.5–26.5 mm at concentrations 4.2 mg mL-1 to 267 mg mL-1. PPE's minimum inhibitory concentration (MIC) varies among bacterial strains, with the lowest being 8.3 mg mL-1. Ball-milled nano-scale pomegranate peel (NSPP) with 89.09 nm particle increased IZ 3-fold and decreased MIC significantly. MTT was used to assess the NSPPE's cytotoxicity against the Vero normal kidney and caco cell lines. At lower doses, NSPPE was safe, but increasing concentrations gradually lethal against Vero normal kidney cell line. NSPPE was highly toxic to caco cells, with an IC50 339.76±13.9 µg mL-1. Fish kofta samples treated with NSPPE were completely free of Escherichia coli and Staphylococcus aureus after 8 weeks of storage. This study demonstrates that NSPPE may improve fish food safety and shelf life as a natural preservative.
Mostrar más [+] Menos [-]Genetic Diversity Analysis of Restorer Lines of Rapeseed (Brassica napus L.) Texto completo
2024
Chakraborty, Panchali | Rasul, M Golam | Haque, M Moynul | Islam, A K M Aminul
Genetic Diversity Analysis of Restorer Lines of Rapeseed (Brassica napus L.) Texto completo
2024
Chakraborty, Panchali | Rasul, M Golam | Haque, M Moynul | Islam, A K M Aminul
Genetic diversity (GD) helps in the selection of valuable parents which is the key to improving heterosis breeding and thus GD within the collected or derived germplasm should be explored. The present study aims to quantify the GD of restorer lines of rapeseeds based on seed yield components. An experiment was conducted in a Randomized Complete Block Design with three replications. The first four principal components explained 35%, 24%, 16% and 10% of total variance, respectively. PC1 exhibited a positive relationship with branches/plant, pods/plant, thousand-seed weight, and seed yield/plant. The PC1 and PC2, projected branches/plant and pods/plant, showed a positive correlation with seed yield/plant. There were also positive correlations among plant height and days with first blooming and 100% flowering and maturity. Cluster study revealed that the restorer lines were clustered into 4 clusters where Tori was the only one (cluster 4) that did not coalesce with the rest of the R lines. Clusters 1-3 consist of 10, 13 and 11 R lines. Based on the above findings, diverse genotypes can be selected for the development of high-yielding variety through hybridization.
Mostrar más [+] Menos [-]Genetic Diversity Analysis of Restorer Lines of Rapeseed (Brassica napus L.) Texto completo
2024
Panchali Chakraborty | M Golam Rasul | M Moynul Haque | A K M Aminul Islam
Genetic diversity (GD) helps in the selection of valuable parents which is the key to improving heterosis breeding and thus GD within the collected or derived germplasm should be explored. The present study aims to quantify the GD of restorer lines of rapeseeds based on seed yield components. An experiment was conducted in a Randomized Complete Block Design with three replications. The first four principal components explained 35%, 24%, 16% and 10% of total variance, respectively. PC1 exhibited a positive relationship with branches/plant, pods/plant, thousand-seed weight, and seed yield/plant. The PC1 and PC2, projected branches/plant and pods/plant, showed a positive correlation with seed yield/plant. There were also positive correlations among plant height and days with first blooming and 100% flowering and maturity. Cluster study revealed that the restorer lines were clustered into 4 clusters where Tori was the only one (cluster 4) that did not coalesce with the rest of the R lines. Clusters 1-3 consist of 10, 13 and 11 R lines. Based on the above findings, diverse genotypes can be selected for the development of high-yielding variety through hybridization.
Mostrar más [+] Menos [-]Description of Leafhopper, Hebata (Alboneurasca) decipiens (Paoli, 1930) and Its Transmitting Phytoplasma Infesting Sugar Beet Plants Texto completo
2023
Ibrahim, Heba | Abdelrahman Emam, Azza | Bondok, Ahmed | Ahmed, Magdy | Abd-Elraheem, Amro
Description of Leafhopper, Hebata (Alboneurasca) decipiens (Paoli, 1930) and Its Transmitting Phytoplasma Infesting Sugar Beet Plants Texto completo
2023
Ibrahim, Heba | Abdelrahman Emam, Azza | Bondok, Ahmed | Ahmed, Magdy | Abd-Elraheem, Amro
The second sugar crop of sugar production after sugar cane world-wide is sugar beet (Beta vulgaris L.). This plant is subjected to the infestation of several insect pests that cause considerable damage, especially leafhoppers, that can transmit phytopathogens (e.g., phytoplasma). In this work, we identified and described the leafhopper, Hebata (Alboneurasca) decipiens, in addition to detection and molecular identification of Candidatus Phyto-plasma that was transmitted by this leafhopper on sugar beet plants from naturally infected sugar beet plants to an uninfected one. The 16S rDNA gene from phytoplasma was amplified by a nested polymerase chain reaction (PCR) assay and directly sequenced using specific primer pairs DNA fragments. The resulting sequences were analyzed and compared with another phytoplasma sequence available at GenBank sequences performing BLAST using DNAMAN.
Mostrar más [+] Menos [-]Description of Leafhopper, Hebata (Alboneurasca) decipiens (Paoli, 1930) and Its Transmitting Phytoplasma Infesting Sugar Beet Plants Texto completo
2023
Heba Ibrahim | Azza Abdelrahman Emam | Ahmed Bondok | Magdy Ahmed | Amro Abd-Elraheem
Sugar beet (Beta vulgaris L.) is the second sugar crop for sugar production after sugar cane worldwide. This plant is subjected to the infestation of several insect pests that cause considerable damage, especially leafhoppers, that can transmit phytopathogens (e.g., phytoplasma). In this work, we identified and described the leafhopper, Hebata (Alboneurasca) decipiens, in addition to the detection and molecular identification of Candidatus Phytoplasma that was transmitted by this leafhopper on sugar beet plants from naturally infected sugar beet plants to an uninfected one. The 16S rDNA gene from phytoplasma was amplified by a nested polymerase chain reaction (PCR) assay and directly sequenced using specific primer pairs DNA fragments. The resulting sequences were analyzed and compared with another phytoplasma sequence available at GenBank sequences performing BLAST using DNAMAN.
Mostrar más [+] Menos [-]The Potential Efficiency of Lactobacillus farraginis Isolated from Ruminants with a View to be Used as Animal Probiotics Texto completo
2023
Zayed, Mona | Abd El-Fattah, Dalia | Abbas, Rateb | El-Bordeny, N.
The Potential Efficiency of Lactobacillus farraginis Isolated from Ruminants with a View to be Used as Animal Probiotics Texto completo
2023
Zayed, Mona | Abd El-Fattah, Dalia | Abbas, Rateb | El-Bordeny, N.
Probiotics refer to the microorganisms that exhibit a beneficial effect on the animals’ health through intestinal microbial balance. This investigation intends to identify and define the probiotic characteristics of Lactobacillus strains isolated from the digestive systems of ruminants. Bacterial strains were isolated purified and characterized based on morphological and biochemical characteristics. The isolates were identified using the 16S rRNA gene partial sequencing method. Most of the strains exhibited a decrease in the growth by increasing the concentration of the bile salt, NaCl, increasing the temperature over 37˚C, and moving toward neutrality and alkalinity of the media. Strain Lactobacillus farraginis MD_A11 revealed the lowest de-crease in the growth percentage when subjected to different bile salt concentrations of 5.96, 6.61, 6.85, 7.40, 7.53, and 7.64%, NaCl% concentrations of 1.40, 5.62, 6.48, 7.36, 7.39, 7.41, 7.42, 7.28, and 13.76%, raising the temperature over 37oC being 4.19 & 3.945%, different pH levels as compared to control, and it recorded the lowest medium pH after the third day being 4.20 with titrable acidity of 0.32%. Strain Lactobacillus farraginis MD_A11 could be recommended as a probiotic feed additive for ruminants to improve their growth performance and productivity.
Mostrar más [+] Menos [-]The Potential Efficiency of Lactobacillus farraginis Isolated from Ruminants with a View to be Used as Animal Probiotics Texto completo
2023
Mona Zayed | Dalia Abd El-Fattah | Rateb Abbas | N. El-Bordeny | Sherif Edris
Probiotics refer to microorganisms that exhibit a beneficial effect on the animals’ health through intestinal microbial balance. This investigation intends to identify and define the probiotic characteristics of Lactobacillus strains isolated from the digestive systems of ruminants. Bacterial strains were isolated purified and characterized based on morphological and biochemical characteristics. The isolates were identified using the 16S rRNA gene partial sequencing method. Most of the strains exhibited a decrease in the growth by increasing the concentration of the bile salt, NaCl, increasing the temperature over 37oC, and moving toward neutrality and alkalinity of the media. Strain Lactobacillus farraginis MD_A11 revealed the lowest decrease in the growth percentage when subjected to different bile salt concentrations of 5.96, 6.61, 6.85, 7.40, 7.53, and 7.64%, NaCl% concentrations of 1.40, 5.62, 6.48, 7.36, 7.39, 7.41, 7.42, 7.28, and 13.76%, raising the temperature over 37oC being 4.19 & 3.945%, different pH levels as compared to control, and it recorded the lowest medium pH after the third day being 4.20 with titrable acidity of 0.32%. Strain Lactobacillus farraginis MD_A11 could be recommended as a probiotic feed additive for ruminants to improve their growth performance and productivity.
Mostrar más [+] Menos [-]Effect of Pruning Levels on Yield and Fruit Quality of Melody (Blagratwo) Seedless Table Grape Cultivar Texto completo
2023
Ali, Ali | Abdle Hamid, Nazmy | shaddad, Amin | Nasser, Mohamed
Effect of Pruning Levels on Yield and Fruit Quality of Melody (Blagratwo) Seedless Table Grape Cultivar Texto completo
2023
Ali, Ali | Abdle Hamid, Nazmy | shaddad, Amin | Nasser, Mohamed
Three years old uniform vines for cv. "Melody syn. Blagratwo" seedless table grape were selected, and three levels of bud load were trimmed, namely 60, 72, and 78 buds/ vine. The findings revealed that vegetative growth traits, characteristics of yield and bunch quality were significantly affected by all different pruning levels of cane length in both seasons of this study. Highest bud load vines (78 buds/vine) produced the greatest yield and cluster number but had a negative effect on the percentage of bud behavior, shoot thickness, shoot length, weight of annual pruning (Kg/vine), cluster and berry quality parameters. In contrast, lowest vine bud load (78 buds/vine) had a better bud behavior, vegetative growth traits, cluster characteristics and berry characteristics but both bunch numbers and yield were reduced. In addition, vines pruned with bud load of 72 buds per vine significantly showed the best outcomes, since it successfully struck a balance be-tween features of vegetative growth, yield, cluster and berry physical and quality attributes in both seasons.
Mostrar más [+] Menos [-]Effect of Pruning Levels on Yield and Fruit Quality of Melody (Blagratwo) Seedless Table Grape Cultivar Texto completo
2023
Ali Ali | Nazmy Abdle Hamid | Amin shaddad | Mohamed Nasser
Three years old uniform vines for cv. "Melody syn. Blagratwo" seedless table grape were selected, and three levels of bud load were trimmed, namely 60, 72, and 78 buds/ vine. The findings revealed that vegetative growth traits, characteristics of yield and bunch quality were significantly affected by all different pruning levels of cane length in both seasons of this study. Highest bud load vines (78 buds/vine) produced the greatest yield and cluster number but had a negative effect on the percentage of bud behavior, shoot thickness, shoot length, weight of annual pruning (Kg/vine), cluster and berry quality parameters. In contrast, lowest vine bud load (78 buds/vine) had a better bud behavior, vegetative growth traits, cluster characteristics and berry characteristics but both bunch numbers and yield were reduced. In addition, vines pruned with bud load of 72 buds per vine significantly showed the best outcomes, since it successfully struck a balance be-tween features of vegetative growth, yield, cluster and berry physical and quality attributes in both seasons.
Mostrar más [+] Menos [-]Production of Functional Ice Cream Using Camel Milk Fat Fractions Texto completo
2023
Abutaha, Alaa | Hussein, Gehan | Desouky, Marwa | Awad, Rezk
Production of Functional Ice Cream Using Camel Milk Fat Fractions Texto completo
2023
Abutaha, Alaa | Hussein, Gehan | Desouky, Marwa | Awad, Rezk
The aim of this work is to examine the quality features of functional camel ice cream (8% fat) prepared by replacing the cream with a solid milk fat fraction (SMF), a liquid milk fat fraction (LMF) and LMF:SMF (2:1 v/v) in the ice cream mixtures. All samples were assessed for their physio-chemical and rheological characteristics and the sensory quality of the ice cream mixtures and resulting ice cream. The results clarified that the type of milk fat fraction affected the viscosity of the ice cream mixtures. Also, the whipping ability decreased gradually with increasing slip melting point of the fraction used. The use of SMF in the ice cream mix decreased the adsorption of protein and fat destabilization, characterized by the slowest melting compared to ice cream with other milk fat sources. The highest and lowest hardness values were found in ice cream mixtures made with SMF and LMF, respectively. In conclusion, ice cream was successfully made by replacing the milk cream fat fractions. Cream substitution with SMF followed by LMF:SMF (2:1 v/v) is recommended in arid and semi-arid regions and improved the whipping ability, overrun, and flavor scores, which were lower when using SMF.
Mostrar más [+] Menos [-]Production of Functional Ice Cream Using Camel Milk Fat Fractions Texto completo
2023
Alaa Abutaha | Gehan Hussein | Marwa Desouky | Rezk Awad
This work aims to examine the quality features of functional cam-el ice cream (8% fat) prepared by replacing the cream with a solid milk fat fraction (SMF), a liquid milk fat fraction (LMF) and LMF: SMF (2:1 v/v) in the ice cream mixtures. All samples were assessed for their physiochemical and rheological characteristics and the sensory quality of the ice cream mixtures and resulting ice cream. The results clarified that the type of milk fat fraction affected the viscosity of the ice cream mixtures. Also, the whipping ability decreased gradually with the increasing slip melting point of the fraction used. The use of SMF in the ice cream mix decreased the adsorption of protein and fat destabilization, characterized by the slowest melting compared to ice cream with other milk fat sources. The highest and lowest hardness values were found in ice cream mixtures made with SMF and LMF, respectively. In conclusion, ice cream was successfully made by replacing the milk cream fat fractions. Cream substitution with SMF followed by LMF: SMF (2:1 v/v) is recommended in arid and semi-arid regions and improved the whipping ability, overrun, and flavor scores, which were lower when using SMF.
Mostrar más [+] Menos [-]Effect of Rumen-Protected Choline Supplementation on Growth Performance of Fattening Calves Texto completo
2023
Amin, Abdelrahman | marwan, Ahmed | Abdelaziz, Fouad | Elbordiny, Nasr
Effect of Rumen-Protected Choline Supplementation on Growth Performance of Fattening Calves Texto completo
2023
Amin, Abdelrahman | marwan, Ahmed | Abdelaziz, Fouad | Elbordiny, Nasr
This study aimed to evaluate the influence of choline chloride supplementation on the growth performance of feedlot calves. Thirty-two crossbred calves with a mean initial body weight of 305.71 ±4.09 Kg were divided into three groups of 10, 11 and 11 animals, randomly. The animals were distributed to one of three dietary treatments, control, choline15 and choline 30 (the rations supplemented with 0, 15 and 30 g choline chloride, respectively). The animals were fed on concentrate feed at a rate of about 2.15% of their live body weight and rice straw open access. Supplementing animal ration with choline chloride did not significantly affect all nutrients digestibility and feeding value. The animals supplemented with 30 g choline chloride recorded significantly higher (P=0.037) total serum protein concentration compared to the other groups. The group received a ration supplemented with 30 g choline chloride and recorded significantly higher final weight, total gain, and mean daily gain. Data showed significant improvement in TDN, CP, and DCP conversion for the animal received ration supplemented with 30 g choline chloride compared to the control group. In conclusion, supplementing fattening calves' ration with rumen-protected choline could improve average daily gain and feed conversion.
Mostrar más [+] Menos [-]Effect of Rumen-Protected Choline Supplementation on Growth Performance of Fattening Calves Texto completo
2023
Abdelrahman Amin | Ahmed Marwan | Fouad Abdelaziz | Nasr Elbordiny
This study aimed to evaluate the influence of choline chloride supplementation on the growth performance of feedlot calves. Thirty-two crossbred calves with a mean initial body weight of 305.71±4.09 Kg were divided into three groups of 10, 11 and 11 animals, randomly. The animals were distributed to one of three dietary treatments, control, choline15 and choline 30 (the rations supplemented with 0, 15 and 30 g choline chloride, respectively). The animals were fed on concentrate feed at a rate of about 2.15% of their live body weight and rice straw open access. Supplementing animal ration with choline chloride did not significantly affect all nutrients' digestibility and feeding value. The animals supplemented with 30 g choline chloride recorded significantly higher (P=0.037) total serum protein concentration compared to the other groups. The group received a ration supplemented with 30 g of choline chloride and recorded significantly higher final weight, total gain, and mean daily gain. Data showed significant improvement in TDN, CP and DCP conversion for the animal received ration supplemented with 30 g choline chloride compared to the control group. In conclusion, supplementing fattening calves' ration with rumen-protected choline could improve average daily gain and feed conversion.
Mostrar más [+] Menos [-]Stenotrophomonas rhizophila a Novel Plant-Associated Bacterium With Distinguished PGPRs Properties Texto completo
2023
Elhosieny, Asmaa | Zayed, Mona | Selim, Shawky | Abdel Aziz, Norhan
Stenotrophomonas rhizophila a Novel Plant-Associated Bacterium With Distinguished PGPRs Properties Texto completo
2023
Elhosieny, Asmaa | Zayed, Mona | Selim, Shawky | Abdel Aziz, Norhan
Stenotrophomonas sp. is a plant-associated rhizospheric bacteria. It has the capability to enhance plant productivity. It acts as a mineral dissolution and growth promoter for plants under salt-stress conditions. The selected isolates revealed the general morphological and biochemical characteristics of Stenotrophomonas sp. All the isolates exhibited the highest growth density after 15 hr. at 30˚C, resistance to different levels of salinity, different pH levels, and different temperature degrees. Also, the isolates revealed their capabilities to solubilize phosphorus and potassium and to pro-duce different phytohormones. The isolate X.M9 exhibited the highest growth performance in the form of 1.376,1.326,1.292,1.053 and 1.059 OD in most salts’ concentrations compared to all tested isolates respectively. As well it (X.M9) exhibited the highest resistance to low temperatures 10 and 15oC being 0.917 and 1.354 OD respectively. The isolate X.M9 recorded the highest IAA of 83.73 mg/100ml compared to all the tested isolates. The isolate X.M9 were identified using 16 SRNA sequencing and submitted to the GenBank database under accession number No: OP050187 as Stenotrophomonas rhizophila.
Mostrar más [+] Menos [-]Stenotrophomonas rhizophila a Novel Plant-Associated Bacterium With Distinguished PGPRs Properties Texto completo
2023
Asmaa Elhosieny | Mona Zayed | Shawky Selim | Ayman Yassen | Norhan Abdel Aziz
Stenotrophomonas sp. is a plant-associated rhizospheric bacteria. It can enhance plant productivity. It acts as a mineral dissolution and growth promoter for plants under salt-stress conditions. The selected isolates revealed the general morphological and biochemical characteristics of Stenotrophomonas sp. All the isolates exhibited the highest growth density after 15 hr. at 30oC, resistance to different levels of salinity, different pH levels, and different temperature degrees. Also, the isolates revealed their capabilities to solubilize phosphorus and potassium and to produce different phytohormones. The isolate X.M9 exhibited the highest growth performance in the form of 1.376,1.326,1.292,1.053 and 1.059 OD in most salts’ concentrations compared to all tested isolates respectively. In addition, it (X.M9) exhibited the highest resistance to low temperatures 10 and 15oC being 0.917 and 1.354 OD respectively. The isolate X.M9 recorded the highest IAA of 83.73 mg/100ml compared to all the tested isolates. The isolate X.M9 was identified using 16 SRNA sequencing and submitted to the GenBank database un-der accession number No: OP050187 as Stenotrophomonas rhizophila.
Mostrar más [+] Menos [-]Isolation and Characterization of Probiotics from Various Food Products as Potential Human Food Additives Texto completo
2023
Mohamed Ali, Fekria | Abdelhafez, Ahmed | Hassan, Enas | Abd-Elhalim, Basma
Isolation and Characterization of Probiotics from Various Food Products as Potential Human Food Additives Texto completo
2023
Mohamed Ali, Fekria | Abdelhafez, Ahmed | Hassan, Enas | Abd-Elhalim, Basma
In this study, human-safe lactic acid microorganisms (LAM) were isolated from food samples to be used as potential additives for human food. Samples from various food sources (artisanal cheeses, fermented chickpeas, fermented rice, natural yogurt, pickles, and raw milk) were used to inoculate de Man, Rogosa, and Sharpe (MRS) and malt agar plates, which were incubated at 30°C for 48 h or 37°C for 72 h to isolate lactic acid bacteria and yeast, respectively. Out of 120 isolates (85 bacteria and 35 yeast), 75 isolates showed γ-hemolytic activity and were considered “Generally Recognized As Safe” (GRAS) isolates. After testing their growth rate under the gastrointestinal tract (GIT) conditions, including acidic pH and specific bile salt concentrations, we selected 30 isolates. Then, we evaluated the fermentative abilities of these 30 isolates on nine types of carbohydrates, their total acidity, and their antagonistic activity against five human pathogens. Based on the results of these tests, four isolates were selected for identification using the Biolog program and 16S rRNA sequencing for bacteria and 18S rRNA sequencing for yeast and found to be Bacillus bingmayongesis (FJAT-13831),Lacticaseibacillus paracasei (R094), Pediococcus pentosaceus (DSM20336), and one yeast isolate as Saccharomyces cerevisiae (SaCe1 26S).
Mostrar más [+] Menos [-]Isolation and Characterization of Probiotics from Various Food Products as Potential Human Food Additives Texto completo
2023
Fekria Mohamed Ali | Enas Hassan | Ahmed Abdelhafez | Basma Abd-Elhalim
In this study, human-safe lactic acid microorganisms (LAM) were isolated from food samples to be used as potential additives for human food. Samples from various food sources (artisanal cheeses, fermented chickpeas, fermented rice, natural yogurt, pickles, and raw milk) were used to inoculate de Man, Rogosa, and Sharpe (MRS) and malt agar plates, which were incubated at 30°C for 48 h or 37°C for 72 h to isolate lactic acid bacteria and yeast, respectively. Out of 120 isolates (85 bacteria and 35 yeast), 75 isolates showed γ-hemolytic activity and were considered “Generally Recognized As Safe” (GRAS) isolates. After testing their growth rate under the gastrointestinal tract (GIT) conditions, including acidic pH and specific bile salt concentrations, we selected 30 isolates. Then, we evaluated the fermentative abilities of these 30 isolates on nine types of carbohydrates, their total acidity, and their antagonistic activity against five human pathogens. Based on the results of these tests, four isolates were selected for identification using the Biolog program and 16S rRNA sequencing for bacteria and 18S rRNA sequencing for yeast and found to be Bacillus bingmayongesis (FJAT-13831), Lacticaseibacillus paracasei (R094), Pediococcus pentosaceus (DSM 20336), and one yeast isolate as Saccharomyces cerevisiae (SaCe1 26S).
Mostrar más [+] Menos [-]Biological Adsorption and Desorption of Anionic Congo Red Dye by Nano Composite Polymer Sheets Texto completo
2023
Magdy, Hagar | Madian, Hekmat | Abdelhamid, Ahmed | Nasser, Notiala | Hegazi, Mahmoud | Labena, Ahmed
Biological Adsorption and Desorption of Anionic Congo Red Dye by Nano Composite Polymer Sheets Texto completo
2023
Magdy, Hagar | Madian, Hekmat | Abdelhamid, Ahmed | Nasser, Notiala | Hegazi, Mahmoud | Labena, Ahmed
Congo red (CR) is an anionic dye that is released from various industries and demonstrates a negative effect on the environment and human health. Dye`s elimination from the environment is an important challenge; therefore, the aim of this study was the application of unhydrolyzed sugarcane bagasse wastes, after acid hydrolysis, drying, grinding and including cellulose acetate to form different composite sheets. The composite sheets were applied in the 3Rs (Removal of Congo red using the composite sheet, Recover of the Congo red after removal using ethanol, and Reuse of the composite sheet many times) processes. The Congo red removal efficiency by the composite sheets was optimized using two statistical methods, One Factor at A Time (OFAT) and General Factorial Design. Afterward, isotherms models and kinetics studies were investigated; moreover, the reusability was also examined. The results exhibited that, the Congo red removal efficiency of 76.27 % was achieved for 500 ppm of the dye using the composite sheet with a concentration of 7 g/L; at a pH value of 7.0 and a contact time of 240 min. Interestingly, the composite sheets have been applied for 3Rs (Removal, Recovery, Reuse) cycles 5 times.
Mostrar más [+] Menos [-]Biological Adsorption and Desorption of Anionic Congo Red Dye by Nano Composite Polymer Sheets Texto completo
2023
Hagar Magdy | Hekmat Madian | Ahmed Abdelhamid | Notiala Nasser | Mahmoud Hegazi | Ahmed Labena
Congo red (CR) is an anionic dye that is released from various industries and demonstrates a negative effect on the environment and human health. Dye`s elimination from the environment is an important challenge; therefore, the aim of this study was the application of unhydrolyzed sugarcane bagasse wastes, after acid hydrolysis, drying, grinding and including cellulose acetate to form different composite sheets. The composite sheets were applied in the 3Rs (Removal of Congo red using the composite sheet, Recover of the Congo red after removal using ethanol, and Reuse of the composite sheet many times) processes. The Congo red removal efficiency by the composite sheets was optimized using two statistical methods, One Factor at A Time (OFAT) and General Factorial Design. Afterward, isotherms models and kinetics studies were investigated; moreover, the reusability was also examined. The results exhibited that, the Congo red removal efficiency of 76.27 % was achieved for 500 ppm of the dye using the composite sheet with a concentration of 7 g/L; at a pH value of 7.0 and a contact time of 240 min. Interestingly, the composite sheets have been applied for 3Rs (Removal, Recovery, Reuse) cycles 5 times.
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