Pub Date : 2023-12-09DOI: 10.21608/sjdfs.2023.242279.1136
Abdallah El-Zahed, Mahmoud Khalifa, M. El-Zahed, Z. Baka
Green synthesis sources for synthesizing metal oxide nanoparticles are an interesting and expanding research area due to their potential antibacterial applications. Generally, nanoparticles are prepared using different chemical and physical methods that yield toxic or harmful nano-scaled particles in addition to the high cost and complicated processing steps. The present study successfully biosynthesized manganese oxide nanoparticles (MnO NPs) by reducing Manganese sulfate ( MnSO 4 .H 2 O) using the cell-free supernatant of Bacillus subtilis ATCC6633. The formation of MnO NPs was confirmed by UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), Zeta analysis and transmission electron microscope (TEM). The biosynthesized MnO NPs displayed two absorption peaks at 285 and 353 nm. FT-IR spectrum proved the existence of bacterial proteins during the biosynthesis of MnO NPs that might act as stabilizing agents. MnO NPs have a negative charge of -20.4 mV according to Zeta analysis. TEM micrographs showed the rod-shape of MnO NPs with lengths of 70 to 100 nm and diameters of 10 to 23 nm. MnO NPs had a bactericidal action against Bacillus cereus and Escherichia coli with zones of inhibition of 23 and 25 mm, respectively in addition to minimum inhibitory concentration values of 20 and 15 µg/ml, respectively. The obtained results highlighted the possibility of using MnO NPs as a strong antibacterial agent in different industrial and medical applications.
{"title":"Biological synthesis and characterization of antibacterial manganese oxide nanoparticles using Bacillus subtilis ATCC6633","authors":"Abdallah El-Zahed, Mahmoud Khalifa, M. El-Zahed, Z. Baka","doi":"10.21608/sjdfs.2023.242279.1136","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.242279.1136","url":null,"abstract":"Green synthesis sources for synthesizing metal oxide nanoparticles are an interesting and expanding research area due to their potential antibacterial applications. Generally, nanoparticles are prepared using different chemical and physical methods that yield toxic or harmful nano-scaled particles in addition to the high cost and complicated processing steps. The present study successfully biosynthesized manganese oxide nanoparticles (MnO NPs) by reducing Manganese sulfate ( MnSO 4 .H 2 O) using the cell-free supernatant of Bacillus subtilis ATCC6633. The formation of MnO NPs was confirmed by UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), Zeta analysis and transmission electron microscope (TEM). The biosynthesized MnO NPs displayed two absorption peaks at 285 and 353 nm. FT-IR spectrum proved the existence of bacterial proteins during the biosynthesis of MnO NPs that might act as stabilizing agents. MnO NPs have a negative charge of -20.4 mV according to Zeta analysis. TEM micrographs showed the rod-shape of MnO NPs with lengths of 70 to 100 nm and diameters of 10 to 23 nm. MnO NPs had a bactericidal action against Bacillus cereus and Escherichia coli with zones of inhibition of 23 and 25 mm, respectively in addition to minimum inhibitory concentration values of 20 and 15 µg/ml, respectively. The obtained results highlighted the possibility of using MnO NPs as a strong antibacterial agent in different industrial and medical applications.","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"205 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.21608/sjdfs.2023.222524.1117
Mohammed Taha, Tarek Mostafa, Tarek Abd El-Rahman
The use of face masks has become ubiquitous across a wide range of industries and professions, including healthcare, food service, construction, manufacturing, retail, hospitality, transportation, education, and public safety. To overcome this challenge, masked face recognition has emerged as a vital technology in recent years. By utilizing advanced algorithms and deep learning techniques, masked face recognition enables accurate identification and authentication of individuals even in scenarios where masks are worn. This paper presents a novel method for recognizing faces with masks. The proposed method integrates deep learning-based mask detection, landmark and oval face detection, and robust principal component analysis (RPCA) to accurately identify and authenticate individuals wearing masks. A pretrained ssd-MobileNetV2 model is utilized to detect the presence and location of masks on a face, while landmark and oval face detection are used to identify and extract important facial features. RPCA is applied to separate the occluded and non-occluded components of an image, making the method more reliable in identifying faces with masks. To further optimize the performance of the proposed method, the Gazelle Optimization Algorithm (GOA) is used to optimize both the KNN features and the number of k for KNN. Experimental results demonstrate that the proposed method outperforms existing methods in terms of accuracy and robustness to occlusion, achieving a recognition rate of 97%. This represents a significant improvement over existing methods for masked face recognition. The proposed method has the potential to be applied in a wide range of real-world scenarios, such as security systems, access control, and public health measures. The results of this study demonstrate that the integration of deep learning-based mask detection, landmark and oval face detection, and RPCA can improve the accuracy and reliability of masked face recognition, even in challenging and complex environments. The proposed method can be further improved and extended in future research to address other challenges in this field.
{"title":"A Novel Hybrid Approach to Masked Face Recognition using Robust PCA and GOA Optimizer","authors":"Mohammed Taha, Tarek Mostafa, Tarek Abd El-Rahman","doi":"10.21608/sjdfs.2023.222524.1117","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.222524.1117","url":null,"abstract":"The use of face masks has become ubiquitous across a wide range of industries and professions, including healthcare, food service, construction, manufacturing, retail, hospitality, transportation, education, and public safety. To overcome this challenge, masked face recognition has emerged as a vital technology in recent years. By utilizing advanced algorithms and deep learning techniques, masked face recognition enables accurate identification and authentication of individuals even in scenarios where masks are worn. This paper presents a novel method for recognizing faces with masks. The proposed method integrates deep learning-based mask detection, landmark and oval face detection, and robust principal component analysis (RPCA) to accurately identify and authenticate individuals wearing masks. A pretrained ssd-MobileNetV2 model is utilized to detect the presence and location of masks on a face, while landmark and oval face detection are used to identify and extract important facial features. RPCA is applied to separate the occluded and non-occluded components of an image, making the method more reliable in identifying faces with masks. To further optimize the performance of the proposed method, the Gazelle Optimization Algorithm (GOA) is used to optimize both the KNN features and the number of k for KNN. Experimental results demonstrate that the proposed method outperforms existing methods in terms of accuracy and robustness to occlusion, achieving a recognition rate of 97%. This represents a significant improvement over existing methods for masked face recognition. The proposed method has the potential to be applied in a wide range of real-world scenarios, such as security systems, access control, and public health measures. The results of this study demonstrate that the integration of deep learning-based mask detection, landmark and oval face detection, and RPCA can improve the accuracy and reliability of masked face recognition, even in challenging and complex environments. The proposed method can be further improved and extended in future research to address other challenges in this field.","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"366 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138983179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.21608/sjdfs.2023.245746.1138
A. Basal, Mohammad Sarhan, Mostafa Alfarog, Ahmad El Bahrawy
The Ghadames basin is the second-largest oil-producing basin in Libya. One of the gas and oil producers in the Ghadames basin is Al Wafa Field. The purpose of this investigation is to assess the Aouinet Uennin Formation (F3) "B" sandstone in the Al Wafa field, Ghadames Basin, Libya, specifically in the A37-NC169a well. The well-logging analysis revealed that the water saturation of the upper-most F3B sandstone is less than 30% reflecting its superior reservoir potentiality. The findings showed that the relative permeability to water as well as the water cut value equal zero while the relative permeability to oil is 100%, which confirm that this interval is at irreducible state. The applied J function technique approved the high-quality reservoir performance of F3B Upper Unit 1 with low computed J values (< 3.48) reflecting the low capillary pressure and the presence of mega-pores. The calculated irreducible water saturation is 22%, which matches the obtained core data.
{"title":"Relative permeabilities as dynamic petrophysical parameters, Wafa Field, Ghadamis Basin, North West Libya","authors":"A. Basal, Mohammad Sarhan, Mostafa Alfarog, Ahmad El Bahrawy","doi":"10.21608/sjdfs.2023.245746.1138","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.245746.1138","url":null,"abstract":"The Ghadames basin is the second-largest oil-producing basin in Libya. One of the gas and oil producers in the Ghadames basin is Al Wafa Field. The purpose of this investigation is to assess the Aouinet Uennin Formation (F3) \"B\" sandstone in the Al Wafa field, Ghadames Basin, Libya, specifically in the A37-NC169a well. The well-logging analysis revealed that the water saturation of the upper-most F3B sandstone is less than 30% reflecting its superior reservoir potentiality. The findings showed that the relative permeability to water as well as the water cut value equal zero while the relative permeability to oil is 100%, which confirm that this interval is at irreducible state. The applied J function technique approved the high-quality reservoir performance of F3B Upper Unit 1 with low computed J values (< 3.48) reflecting the low capillary pressure and the presence of mega-pores. The calculated irreducible water saturation is 22%, which matches the obtained core data.","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"271 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.21608/sjdfs.2023.241505.1135
Rana El-Sadda, Mai Eissa, ElHossein Moawed, M. El-Zahed
Nano polymers have attracted a lot of attention in developing new antimicrobial agents due to their significant advantages. Nanocomposite materials with antimicrobial activity have been widely used in food packaging. The current work introduces efficient nanocomposite; catechol polyurethane foam polymer modified with zinc oxide nanoparticles (PCPU/ZnO) and its application for antimicrobial activity. Catechol polyurethane foam/zinc oxide was synthesized by coupling zinc oxide nanoparticles (ZnONPs) and catechol polyurethane foam polymer (PCPU). The main modifications on the surface of pyrocatechol polyurethane foam/zinc oxide nanocomposite were discussed. The new composite was characterized by ultraviolet-visible spectra (UV-Vis), Fourier transform infrared spectra (FTIR), pH of zero-point charge (PHZPC) and acidic/basic sites. The antimicrobial activity of PCPU/ZnO was tested against G+ve bacterium (Bacillus cereus), Gram-ve bacterium (Escherichia coli) and fungus; A. niger. In vitro agar well-diffusion method showed good inhibition zones of PCPU/ZnO against Escherichia coli (27 ± 0.11 mm), Bacillus cereus (16 ± 0.08 mm) and Aspergillus niger (23 ± 0.14 mm). While PCPU showed a significant antimicrobial effects; with lower inhibition zones against Escherichia coli (20 ± 0.21 mm), Aspergillus niger (15 ± 0.06 mm) and higher inhibition zone against Bacillus cereus (23 ± 0.06 mm).
{"title":"Comparison between antimicrobial assays of catechol-based polyurethane foam polymer and catechol-modified polyurethane foam polymer with zinc oxide nanoparticles","authors":"Rana El-Sadda, Mai Eissa, ElHossein Moawed, M. El-Zahed","doi":"10.21608/sjdfs.2023.241505.1135","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.241505.1135","url":null,"abstract":"Nano polymers have attracted a lot of attention in developing new antimicrobial agents due to their significant advantages. Nanocomposite materials with antimicrobial activity have been widely used in food packaging. The current work introduces efficient nanocomposite; catechol polyurethane foam polymer modified with zinc oxide nanoparticles (PCPU/ZnO) and its application for antimicrobial activity. Catechol polyurethane foam/zinc oxide was synthesized by coupling zinc oxide nanoparticles (ZnONPs) and catechol polyurethane foam polymer (PCPU). The main modifications on the surface of pyrocatechol polyurethane foam/zinc oxide nanocomposite were discussed. The new composite was characterized by ultraviolet-visible spectra (UV-Vis), Fourier transform infrared spectra (FTIR), pH of zero-point charge (PHZPC) and acidic/basic sites. The antimicrobial activity of PCPU/ZnO was tested against G+ve bacterium (Bacillus cereus), Gram-ve bacterium (Escherichia coli) and fungus; A. niger. In vitro agar well-diffusion method showed good inhibition zones of PCPU/ZnO against Escherichia coli (27 ± 0.11 mm), Bacillus cereus (16 ± 0.08 mm) and Aspergillus niger (23 ± 0.14 mm). While PCPU showed a significant antimicrobial effects; with lower inhibition zones against Escherichia coli (20 ± 0.21 mm), Aspergillus niger (15 ± 0.06 mm) and higher inhibition zone against Bacillus cereus (23 ± 0.06 mm).","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"81 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.21608/sjdfs.2023.232675.1131
Fayza Elbakoosh
{"title":"Mode of attachment and histopathological effects of a polyopithocotylean monogenean Gotocotyla secunda (Tripathi, 1956), a gill parasite of Scomberomorus commerson Lacepède 1801 collected from the Mediterranean sea","authors":"Fayza Elbakoosh","doi":"10.21608/sjdfs.2023.232675.1131","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.232675.1131","url":null,"abstract":"","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"229 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.21608/sjdfs.2023.175105.1067
rehab ElQady, A. Tarabia, Ghadeer Alshreef
This paper scrutinizes the transient solution for two-class priority queuing system model with both balking and catastrophes with infinite system capacity. Moreover, some special cases are also presented.
研究了具有无限系统容量的两类优先排队系统模型的暂态解。此外，还介绍了一些特殊情况。
{"title":"Transient Solution of Two –Class priority Queuing System with Balking and Catastrophes","authors":"rehab ElQady, A. Tarabia, Ghadeer Alshreef","doi":"10.21608/sjdfs.2023.175105.1067","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.175105.1067","url":null,"abstract":"This paper scrutinizes the transient solution for two-class priority queuing system model with both balking and catastrophes with infinite system capacity. Moreover, some special cases are also presented.","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82304740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.21608/sjdfs.2023.224186.1122
Mohammad Abdelfattah Sarhan, M. Wady, E. Assal, M. Raia
West Esh El-Mallaha area (WEEM) is situated at the southern onshore part of Gulf of Suez and extended to about 52 km 2 . The main objective of this article is to extract the most important petrophysical parameters of sedimentary sequence to evaluate and define the hydrocarbon potentiality in WEEM area using the available well log data suite. The lithology of each reservoir was detected by using a combination of different logs and different cross-plots including "Neutron-Density Cross-Plot" and" M-N Cross plot" respectively. Four wells were selected for the study (Tawoos-1, RE-4, RE-2 and RE-22) which represent most of the study area. The results of the interpretation indicated that pre-rift reservoirs lithology "Nubia, Matulla" are composed of coarse to fine-grained sandstone with fair to poor sorting. Shale inter-beds are common and some wells show a carbonate layer in the upper Nubia-A. The post-rift reservoir lithology "Nukhul Fm." is one of the chief reservoirs in our study area. Its main lithology is sandstone, limestone, dolomite and shale. The majority of points are distributed as carbonate (dolomite and limestone) with some of it back to the effect of clay minerals and calcareous cement. Different Cross Plots indicated the abundance of dolomite and limestone with minor occurrence of sandstone. The presence of high shale content in Rudies fm. shifted the point downward in M-N Cross plot. This reveals that the reservoir encountered is highly calcareous sandstone. WEEM area considered promising hydrocarbon potentiality, (especially Matulla consider oil producer zone from Tawoos-1 well, (Basement, Nubia, Matulla, and Nukhul clastics) consider oil producer zones from RE-2 well, (Matulla, Nubia) consider oil producer zone from R-4 well, and (Rudies) consider oil producer zone from RE-22 well.
West Esh El-Mallaha地区(WEEM)位于苏伊西湾南部陆上部分，延伸至约52平方公里。本文的主要目的是利用现有的测井资料，提取沉积层序中最重要的岩石物性参数，以评价和确定WEEM地区的油气潜力。利用不同的测井曲线和不同的交叉图(分别为“中子密度交叉图”和“M-N交叉图”)对每个储层的岩性进行了检测。研究选择了4口井(Tawoos-1、RE-4、RE-2和RE-22)，它们代表了大部分研究区域。解释结果表明，“努比亚-马图拉”断陷前储层岩性为粗粒至细粒砂岩，分选性一般至较差。努比亚a- a上部页岩间层普遍存在，部分井显示出碳酸盐岩层。裂谷后储层岩性“努库尔组”是本研究区主要储层之一。主要岩性为砂岩、石灰岩、白云岩和页岩。大部分点以碳酸盐(白云岩和石灰岩)的形式分布，部分受粘土矿物和钙质胶结物的影响。不同的交叉图显示白云岩和灰岩丰度高，砂岩产状少。鲁迪士油田页岩含量高。在M-N交叉图中将点向下平移。这表明所遇储层为高钙化砂岩。WEEM区域考虑了有前景的油气潜力，(特别是Matulla考虑了Tawoos-1井的产油区，(地下室、Nubia、Matulla和Nukhul碎屑)考虑了RE-2井的产油区，(Matulla、Nubia)考虑了R-4井的产油区，(Rudies)考虑了RE-22井的产油区。
{"title":"Oil potentialities of West Esh El-Mallaha area, southern Gulf of Suez as deduced from well log data interpretation","authors":"Mohammad Abdelfattah Sarhan, M. Wady, E. Assal, M. Raia","doi":"10.21608/sjdfs.2023.224186.1122","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.224186.1122","url":null,"abstract":"West Esh El-Mallaha area (WEEM) is situated at the southern onshore part of Gulf of Suez and extended to about 52 km 2 . The main objective of this article is to extract the most important petrophysical parameters of sedimentary sequence to evaluate and define the hydrocarbon potentiality in WEEM area using the available well log data suite. The lithology of each reservoir was detected by using a combination of different logs and different cross-plots including \"Neutron-Density Cross-Plot\" and\" M-N Cross plot\" respectively. Four wells were selected for the study (Tawoos-1, RE-4, RE-2 and RE-22) which represent most of the study area. The results of the interpretation indicated that pre-rift reservoirs lithology \"Nubia, Matulla\" are composed of coarse to fine-grained sandstone with fair to poor sorting. Shale inter-beds are common and some wells show a carbonate layer in the upper Nubia-A. The post-rift reservoir lithology \"Nukhul Fm.\" is one of the chief reservoirs in our study area. Its main lithology is sandstone, limestone, dolomite and shale. The majority of points are distributed as carbonate (dolomite and limestone) with some of it back to the effect of clay minerals and calcareous cement. Different Cross Plots indicated the abundance of dolomite and limestone with minor occurrence of sandstone. The presence of high shale content in Rudies fm. shifted the point downward in M-N Cross plot. This reveals that the reservoir encountered is highly calcareous sandstone. WEEM area considered promising hydrocarbon potentiality, (especially Matulla consider oil producer zone from Tawoos-1 well, (Basement, Nubia, Matulla, and Nukhul clastics) consider oil producer zones from RE-2 well, (Matulla, Nubia) consider oil producer zone from R-4 well, and (Rudies) consider oil producer zone from RE-22 well.","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74829874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-16DOI: 10.21608/sjdfs.2023.169042.1057
El-Sayed El-Morsy, A. M. Abdel-Azeem, Husein Rashad
Mucor hiemalis , Trichoderma viride biomasses and their consortium were assayed as biosorbents of heavy metals in liquids. The influence of initial metal concentration, biomass concentration, pH and contact time on their biosorption capacity to Fe, Pb and Cd were investigated in separate and consortium cultures. The increase in biosorption rate occurs with the increase of initial metal ion concentration, as long as binding sites are unsaturated. Sorption isotherms follow the non-linear Langmuir adsorption principle. The maximal uptake of Fe, Pb and Cd (100 ppm) was 50.77±0.78, 45.20±0.50 and 32.69±0.55 mg/g; 63.39±1.74, 57.38±0.40, and 37.03±0.56 mg/g and 70.41±0.43, 61.69±0.46, and 40.13±0.59 mg/g, for M. hiemalis , Tr. viride and their consortium respectively. Maximum efficiency of biosorption occurs at 200 mg. The highest uptake of Fe, Pb and Cd by M. hiemalis appears at pH 4, while for Tr. viride and their consortium the highest uptake occurs at pH 6. Each fungus has a specific contact time for Fe, Pb and Cd max biosorption. The highest uptake was occurred at 15 min for M. hiemalis . but for Tr. viride , highest uptake occurs at 20 min. In consortium experiment, the highest uptake of Fe and Pb occurs at 20 min but for Cd at 30 min. Generally, biosorption of metal ions proceeds rapidly during the initial 15 min. of contact and then slow down with time and become stable after 30 and 60 min. Based on Qmax values, Tr. viride , M. hiemalis and their consortium are worthy biosorbents of Fe, Pb and Cd.
{"title":"Biosorption of heavy metals by dead biomass of Mucor hiemalis Wehmer and Trichoderma viride Pers. in separate and consortium systems.","authors":"El-Sayed El-Morsy, A. M. Abdel-Azeem, Husein Rashad","doi":"10.21608/sjdfs.2023.169042.1057","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.169042.1057","url":null,"abstract":"Mucor hiemalis , Trichoderma viride biomasses and their consortium were assayed as biosorbents of heavy metals in liquids. The influence of initial metal concentration, biomass concentration, pH and contact time on their biosorption capacity to Fe, Pb and Cd were investigated in separate and consortium cultures. The increase in biosorption rate occurs with the increase of initial metal ion concentration, as long as binding sites are unsaturated. Sorption isotherms follow the non-linear Langmuir adsorption principle. The maximal uptake of Fe, Pb and Cd (100 ppm) was 50.77±0.78, 45.20±0.50 and 32.69±0.55 mg/g; 63.39±1.74, 57.38±0.40, and 37.03±0.56 mg/g and 70.41±0.43, 61.69±0.46, and 40.13±0.59 mg/g, for M. hiemalis , Tr. viride and their consortium respectively. Maximum efficiency of biosorption occurs at 200 mg. The highest uptake of Fe, Pb and Cd by M. hiemalis appears at pH 4, while for Tr. viride and their consortium the highest uptake occurs at pH 6. Each fungus has a specific contact time for Fe, Pb and Cd max biosorption. The highest uptake was occurred at 15 min for M. hiemalis . but for Tr. viride , highest uptake occurs at 20 min. In consortium experiment, the highest uptake of Fe and Pb occurs at 20 min but for Cd at 30 min. Generally, biosorption of metal ions proceeds rapidly during the initial 15 min. of contact and then slow down with time and become stable after 30 and 60 min. Based on Qmax values, Tr. viride , M. hiemalis and their consortium are worthy biosorbents of Fe, Pb and Cd.","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75281857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.21608/sjdfs.2023.216034.1113
E. Toson, Husseini siddiq, Rizk E. Elbaz, H. Fayed
{"title":"Cystic fibrosis transmembrane conductance regulator gene mutations in males with CBAVD versus nonobstructive azoospermia: A review","authors":"E. Toson, Husseini siddiq, Rizk E. Elbaz, H. Fayed","doi":"10.21608/sjdfs.2023.216034.1113","DOIUrl":"https://doi.org/10.21608/sjdfs.2023.216034.1113","url":null,"abstract":"","PeriodicalId":21655,"journal":{"name":"Scientific Journal for Damietta Faculty of Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81956365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-25DOI: 10.21608/sjdfs.2023.207401.1103
yahya bdreldien, M. Abou-Dobara, A. El-Sayed, Mohamed Zaghloul
β-lactamases exhibited by uropathogenic bacteria represent a major issue in the treatment of urinary tract infections. The resistance of β-lactamases is aworld wide medical issue. Recently, the evaluating of bacterial β-lactamases production, and identification of their drug obstruction, should be a constant cycle. The present study was performed to deduce the antibiotic resistance and the β-lactamases gene type of isolates from Oncology Center Hospital (Mansoura University). The results came out that E. coli and K. pneumoniae were the most associated strains (42.0%, and35.0%, respectively). Antimicrobial sensitivity test displayed that K. pneumoniae was resistance to Ciprofloxacin and Levofloxacin, Cefotriaxon and Trimethoprim-sulpham by 37.8%, 39.1%, 39.3%, and 33.8%, respectively. E. coli was resistant to Ciprofloxacin and Levofloxacin, Cefotriaxon and Trimethoprim-sulpham by 41.8%, 41.8%, 45.4%, and46.7%, respectively. The detection of blaTEM gene using Polymerase Chain Reaction showed that it was introduce by 70% in K. pneumoniae and 30% in E.coli of isolates. It could be concluded that β-lactamases production among
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