Pub Date : 2021-05-01DOI: 10.21608/EJCHEM.2021.71477.3570
Ahmed elhenaw, A. Al-Wasidi, M. Refat, A. Naglah
It has been demonstrated that most of the various derivatives of benzimidazole have distinct biological activity that gives clear promises to treat many different diseases, and for this wonderful reason, all the different new formulations based on benzimidazole remain of high concentration of interest to most scientists interested in the pharmacological fields. In this review article, we focused on mentioning many different derivatives of benzimidazole and studying its biological activities for humans and animals alike. In addition, in this reference article we have also focused on the more active benzimidazole derivatives that have shown significant pharmacological effect among patients.
{"title":"Different Potential Biological Activities of Benzimidazole Derivatives","authors":"Ahmed elhenaw, A. Al-Wasidi, M. Refat, A. Naglah","doi":"10.21608/EJCHEM.2021.71477.3570","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.71477.3570","url":null,"abstract":"It has been demonstrated that most of the various derivatives of benzimidazole have distinct biological activity that gives clear promises to treat many different diseases, and for this wonderful reason, all the different new formulations based on benzimidazole remain of high concentration of interest to most scientists interested in the pharmacological fields. In this review article, we focused on mentioning many different derivatives of benzimidazole and studying its biological activities for humans and animals alike. In addition, in this reference article we have also focused on the more active benzimidazole derivatives that have shown significant pharmacological effect among patients.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75773614","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 : 2021-05-01DOI: 10.21608/EJCHEM.2021.40450.2821
O. O. Emoyan
This study evaluated the occurrence and human exposure risk of mono-aromatic hydrocarbons (MAHs) such as benzene, toluene, ethylbenzene, and o,p-xylene (BTEX) in soils from petroleum product jetty from the Niger Delta, Nigeria. Samples were collected from the top (0-15 cm), sub (15-30 cm), and bottom (30-45 cm) soil depths. The MAHs components were determined using Headspace gas chromatography-mass spectrometer (HS-GCMS). The individual and ƩMAHs concentrations ranged from not detected (ND) to 1528 μg kg and ND to 2512 μg kg respectively. The total cancer risks were within the low category. The source identification indicated that the origin MAHs species are attributed to solvent, paints, and gasoline-diesel spill and particulate emission from gasoline/diesel combustion exhaust in the vicinity of the petroleum product jetty. This depicts the presence of low molecular weight petroleum fractions such as gasoline and kerosene that could exhibit toxicological and carcinogenic effects to organisms in soils within the jetty. Clean-up actions should be carried out to prevent the accumulation of MAHs in soil-plant uptake and the potential ecological and human exposure risks of MAHs in the surrounding soil and aquatic ecosystem.
{"title":"Occurrence and exposure risk of mono-aromatic hydrocarbons in selected petroleum product jetty impacted soils from the Niger Delta, Nigeria","authors":"O. O. Emoyan","doi":"10.21608/EJCHEM.2021.40450.2821","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.40450.2821","url":null,"abstract":"This study evaluated the occurrence and human exposure risk of mono-aromatic hydrocarbons (MAHs) such as benzene, toluene, ethylbenzene, and o,p-xylene (BTEX) in soils from petroleum product jetty from the Niger Delta, Nigeria. Samples were collected from the top (0-15 cm), sub (15-30 cm), and bottom (30-45 cm) soil depths. The MAHs components were determined using Headspace gas chromatography-mass spectrometer (HS-GCMS). The individual and ƩMAHs concentrations ranged from not detected (ND) to 1528 μg kg and ND to 2512 μg kg respectively. The total cancer risks were within the low category. The source identification indicated that the origin MAHs species are attributed to solvent, paints, and gasoline-diesel spill and particulate emission from gasoline/diesel combustion exhaust in the vicinity of the petroleum product jetty. This depicts the presence of low molecular weight petroleum fractions such as gasoline and kerosene that could exhibit toxicological and carcinogenic effects to organisms in soils within the jetty. Clean-up actions should be carried out to prevent the accumulation of MAHs in soil-plant uptake and the potential ecological and human exposure risks of MAHs in the surrounding soil and aquatic ecosystem.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82148441","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 : 2021-05-01DOI: 10.21608/EJCHEM.2021.65404.3424
B. Balboul, Moustafa Shaban A. Selim
Abstract In this paper, we fabricate a reactive self-assembled nanostructure of strontium chromium oxygen system (Sr-Cr-O). The ternary oxide SrCrO4 has been prepared as a QDs decorated superlattice. Course of formation as well as the obtained composition was analyzed by a combination of Thermogravimetry (TGA), X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (DRS), scanning electron microscopy in association with EDX and high resolution transmission electron microscopy (TEM). The obtained nanostructure was determined to be composed of SrCrO4 as the major phase and SrCrO3/ SrO1.95 as the minor phases. Excitonic absorption signatures in optical spectroscopy confirmed that quantum confinement is preserved. The methodology involves a modified co-precipitation method. Moreover, excellent UV-visible-light photocatalytic performance was improved toward Methylene blue dye.
{"title":"Physicochemical Impacts of Formation and Assembly of Quantum Dots Flowery Island of the (Sr-Cr-O) Semiconductor","authors":"B. Balboul, Moustafa Shaban A. Selim","doi":"10.21608/EJCHEM.2021.65404.3424","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.65404.3424","url":null,"abstract":"Abstract In this paper, we fabricate a reactive self-assembled nanostructure of strontium chromium oxygen system (Sr-Cr-O). The ternary oxide SrCrO4 has been prepared as a QDs decorated superlattice. Course of formation as well as the obtained composition was analyzed by a combination of Thermogravimetry (TGA), X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (DRS), scanning electron microscopy in association with EDX and high resolution transmission electron microscopy (TEM). The obtained nanostructure was determined to be composed of SrCrO4 as the major phase and SrCrO3/ SrO1.95 as the minor phases. Excitonic absorption signatures in optical spectroscopy confirmed that quantum confinement is preserved. The methodology involves a modified co-precipitation method. Moreover, excellent UV-visible-light photocatalytic performance was improved toward Methylene blue dye.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90200275","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 : 2021-05-01DOI: 10.21608/EJCHEM.2021.64117.3374
D. Marrez, Salah H. Salem, G. Abdel-Rahman, A. Fouzy, S. A. Fatah
Pesticide application is an important issue in intensive agricultural production to achieve self-sufficiency in food production. This study aimed to the determination of pesticide residues from soil samples cultivated with different crops. Forty soil samples from four governorates, ten samples each (Kafr El-Sheikh, El-Beheira, Giza, and Menoufia) were collected for pesticides multi-residual analysis. Also, fifteen vegetable samples were collected from Giza governorate and analyzed for the presence of pesticide residues. Obtained data revealed that soil samples of Giza governorate recorded the highest level of pesticide residues contamination with 70% positive samples followed by Kafr El-Sheikh and Menoufia governorates with 60% positive samples and finally El-Beheira governorate recorded the lowest level of pesticide residues contamination with 30% positive samples. Regarding the levels of pesticide residues in vegetables and crops, about 53.3 % of tested samples (onion, sweet potato, molokhia, cabbage, beet, okra, eggplant, and lettuce) were free from pesticide residues. Meanwhile, about 46.7 % of tested samples (wheat, rocca, green dill, tomato, radish, pepper, and green parsley) showed pesticide residues with different types and concentrations. Propiconazole was the highest residue recorded in green dill with 3.8 mg/kg followed by difenoconazole with 3.22 mg/Kg present in green parsley.
{"title":"Screening for pesticide residues in soil and crop samples in Egypt","authors":"D. Marrez, Salah H. Salem, G. Abdel-Rahman, A. Fouzy, S. A. Fatah","doi":"10.21608/EJCHEM.2021.64117.3374","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.64117.3374","url":null,"abstract":"Pesticide application is an important issue in intensive agricultural production to achieve self-sufficiency in food production. This study aimed to the determination of pesticide residues from soil samples cultivated with different crops. Forty soil samples from four governorates, ten samples each (Kafr El-Sheikh, El-Beheira, Giza, and Menoufia) were collected for pesticides multi-residual analysis. Also, fifteen vegetable samples were collected from Giza governorate and analyzed for the presence of pesticide residues. Obtained data revealed that soil samples of Giza governorate recorded the highest level of pesticide residues contamination with 70% positive samples followed by Kafr El-Sheikh and Menoufia governorates with 60% positive samples and finally El-Beheira governorate recorded the lowest level of pesticide residues contamination with 30% positive samples. Regarding the levels of pesticide residues in vegetables and crops, about 53.3 % of tested samples (onion, sweet potato, molokhia, cabbage, beet, okra, eggplant, and lettuce) were free from pesticide residues. Meanwhile, about 46.7 % of tested samples (wheat, rocca, green dill, tomato, radish, pepper, and green parsley) showed pesticide residues with different types and concentrations. Propiconazole was the highest residue recorded in green dill with 3.8 mg/kg followed by difenoconazole with 3.22 mg/Kg present in green parsley.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75290018","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 : 2021-04-30DOI: 10.21608/EJCHEM.2021.66304.3506
N. Firman, A. Noor, M. Zakir, M. Maming, A. Fathurrahman
{"title":"Absorption of Carbon Dioxide into Potassium Hydroxide: Preliminary Study for its Application into Liquid Scintillation Counting Procedure","authors":"N. Firman, A. Noor, M. Zakir, M. Maming, A. Fathurrahman","doi":"10.21608/EJCHEM.2021.66304.3506","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.66304.3506","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88895390","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 : 2021-04-29DOI: 10.21608/EJCHEM.2021.53105.3124
Fauzia Gjam, Gomaa Eldamrawi, M. Meikhail, M. Abdelghany
New lead-cerium phosphate glasses in the system xCeO2(50-x)PbO-50P2O5 were successfully prepared by the meltquenching process. The amorphous and/or crystalline character of the as prepared compositions were confirmed by both X-ray powder diffraction (XRD) and electron diffraction patterns (EDP) related to transmission electron microscopy (TEM). The surface morphology and the analytical amounts of glasses constituents have been studied by scanning electron microscopy (SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX) apparatus. It was found that P2O5 as a host network can dissolve extremely high concentration from CeO2 without crystallization of the host glass network. Some cerium phosphate (CeP2O7) clusters can be formed and precipitated in the main amorphous network. Formation of such type of clusters has an effective influence on enhancing material structure and properties, since the hardness number of the studied materials is highly enhanced. The chemical shift P NMR of glasses is improved toward increasing shielding process by the effect of CeO2 addition.
{"title":"Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2","authors":"Fauzia Gjam, Gomaa Eldamrawi, M. Meikhail, M. Abdelghany","doi":"10.21608/EJCHEM.2021.53105.3124","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.53105.3124","url":null,"abstract":"New lead-cerium phosphate glasses in the system xCeO2(50-x)PbO-50P2O5 were successfully prepared by the meltquenching process. The amorphous and/or crystalline character of the as prepared compositions were confirmed by both X-ray powder diffraction (XRD) and electron diffraction patterns (EDP) related to transmission electron microscopy (TEM). The surface morphology and the analytical amounts of glasses constituents have been studied by scanning electron microscopy (SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX) apparatus. It was found that P2O5 as a host network can dissolve extremely high concentration from CeO2 without crystallization of the host glass network. Some cerium phosphate (CeP2O7) clusters can be formed and precipitated in the main amorphous network. Formation of such type of clusters has an effective influence on enhancing material structure and properties, since the hardness number of the studied materials is highly enhanced. The chemical shift P NMR of glasses is improved toward increasing shielding process by the effect of CeO2 addition.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81831624","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 : 2021-04-29DOI: 10.21608/EJCHEM.2021.71184.3563
G. Ahmed, Tahir H. Mahmoud, H. Mohammed, A. Hussein
{"title":"Fabrication and Study of ZnO thin Films using Thermal Evaporation Technique","authors":"G. Ahmed, Tahir H. Mahmoud, H. Mohammed, A. Hussein","doi":"10.21608/EJCHEM.2021.71184.3563","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.71184.3563","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91483725","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 : 2021-04-29DOI: 10.21608/EJCHEM.2021.68171.3485
Iman Abbas Hamza Khalaf, A. A. Alkarimi
{"title":"Bovine Serum Albumin Pre-concentration Using Glycidyl Methacrylate-co-ethylene Glycol Dimethacrylate-co- (2-diethylamino) ethyl Methacrylate Monolith","authors":"Iman Abbas Hamza Khalaf, A. A. Alkarimi","doi":"10.21608/EJCHEM.2021.68171.3485","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.68171.3485","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90973464","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 : 2021-04-29DOI: 10.21608/EJCHEM.2021.53056.3260
Leaqaa A. Alrubaie
{"title":"Synthesis, Characterization and computational study of N-Acylhydrazone derivatives.","authors":"Leaqaa A. Alrubaie","doi":"10.21608/EJCHEM.2021.53056.3260","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.53056.3260","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77251599","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 : 2021-04-29DOI: 10.21608/EJCHEM.2021.65573.3407
H. S. Rasheed
{"title":"Study and synthesis of polymer-blend PVA-PEG doped with 5wt% MgO and different wt% of Co3O4 Thin Film","authors":"H. S. Rasheed","doi":"10.21608/EJCHEM.2021.65573.3407","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.65573.3407","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77002481","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}
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