Behnam Karimzadeh Mostafabadi, M. A. Kachoie, E. Rahimi
By benefits of using silicon and vermicompost based biofertilizers and also induction of drought stress for growing more efficient medicinal plants, we investigated such issues on growing Cynara scolymus (C. scolymus), as one of the most significant edible medicinal plants. In this regard, the antimicrobial effects of grown C. scolymus essential oil was investigated against some foodborne pathogens. Different concentrations of silicon and vermicompost with and without drought stress were considered for growing the plant and the extracted essential oils were extracted to examine their antimicrobial effects against different bacterial agents. Using vermicompost and silicon and 50% moisture discharge yielded significant increase in the mean diameter of growth inhibition zone and significant decrease in the minimum inhibitory concentration of tested bacteria (P < 0.05). The highest diameters of the inhibition zones of S. aureus, S. saprophyticus, P. aeruginosa, S. dysenteriae, and S. typhi were found for C. scolymus essential oil treated with 8 mmol silicon and conventional irrigation (14.92 mm), 4 mmol silicon and 50% moisture discharge (15.28 mm), 50% vermicompost and 50% moisture discharge (15.71 mm), 8 mmol silicon and conventional irrigation (17.34 mm) and 25% vermicompost, and 50% moisture discharge (15.48 mm), respectively. Antimicrobial effects of some treatments of C. scolymus were higher than some kinds of referenced antibiotics such as erythromycin. These findings could be used for the production of antibiotic drugs for specific purposes against certain bacteria.
{"title":"Antimicrobial effects of Cynara scolymus essential oil: In vitro analysis","authors":"Behnam Karimzadeh Mostafabadi, M. A. Kachoie, E. Rahimi","doi":"10.3233/mgc-220006","DOIUrl":"https://doi.org/10.3233/mgc-220006","url":null,"abstract":"By benefits of using silicon and vermicompost based biofertilizers and also induction of drought stress for growing more efficient medicinal plants, we investigated such issues on growing Cynara scolymus (C. scolymus), as one of the most significant edible medicinal plants. In this regard, the antimicrobial effects of grown C. scolymus essential oil was investigated against some foodborne pathogens. Different concentrations of silicon and vermicompost with and without drought stress were considered for growing the plant and the extracted essential oils were extracted to examine their antimicrobial effects against different bacterial agents. Using vermicompost and silicon and 50% moisture discharge yielded significant increase in the mean diameter of growth inhibition zone and significant decrease in the minimum inhibitory concentration of tested bacteria (P < 0.05). The highest diameters of the inhibition zones of S. aureus, S. saprophyticus, P. aeruginosa, S. dysenteriae, and S. typhi were found for C. scolymus essential oil treated with 8 mmol silicon and conventional irrigation (14.92 mm), 4 mmol silicon and 50% moisture discharge (15.28 mm), 50% vermicompost and 50% moisture discharge (15.71 mm), 8 mmol silicon and conventional irrigation (17.34 mm) and 25% vermicompost, and 50% moisture discharge (15.48 mm), respectively. Antimicrobial effects of some treatments of C. scolymus were higher than some kinds of referenced antibiotics such as erythromycin. These findings could be used for the production of antibiotic drugs for specific purposes against certain bacteria.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85233843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Water pollution, which is an increasing global concern, is one of the significant environmental problems which damage economic growth and the health of billions of people. Therefore, many companies and investigators make an effort to prepare a reusable and cost-effective filter to overcome the problem of water shortages. In this study, we have investigated two adsorbents with high adsorption capacity: a graphene quantum dot-based composite and a carbon-cage adsorbent prepared only with graphite and hydrazinium azide that are expanded through an electrical heater. Both adsorbents were able to remove almost 100% of the methylene blue dye, which is widely used in the textile industry. Adsorption rates and morphology of adsorbents were analyzed with XRD, SEM, EDS, TGA and UV spectrometry measurements.
{"title":"500 Methylene blue removal with carbon-cage adsorbent produced by hydrazinium azide and comparison of its performance with graphene quantum dot composite","authors":"Leila Nazmi Miardan, E. Rezaii, M. Mahkam","doi":"10.3233/mgc-210165","DOIUrl":"https://doi.org/10.3233/mgc-210165","url":null,"abstract":"Water pollution, which is an increasing global concern, is one of the significant environmental problems which damage economic growth and the health of billions of people. Therefore, many companies and investigators make an effort to prepare a reusable and cost-effective filter to overcome the problem of water shortages. In this study, we have investigated two adsorbents with high adsorption capacity: a graphene quantum dot-based composite and a carbon-cage adsorbent prepared only with graphite and hydrazinium azide that are expanded through an electrical heater. Both adsorbents were able to remove almost 100% of the methylene blue dye, which is widely used in the textile industry. Adsorption rates and morphology of adsorbents were analyzed with XRD, SEM, EDS, TGA and UV spectrometry measurements.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82579232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this research, the geometric structure of LTZ and CCT (5,0) was optimized with B3LYP/6-31G * method using the Gaussian 09W program package to investigate the weak interaction of Letrozole (LTZ) and carbon carbon nanotube (CCT). According to the calculation of the release energy, it was found that the drug delivery process is desirable. Also, the structural properties of the title compounds were assessed by thermodynamic and frontier molecular orbital (FMO) parameters. In this study, a series of measures have been performed to detect changes in drug loading properties and non-bonding interactions between the LTZ and CCT (5,0) nanotube. The non-bonding interaction effects of LTZ and CCT over the electronic properties were also evaluated and argued. The research is based on the fact that studies can help to understand the interaction between the LTZ drug and CCT (5,0) nanotube and the development of CCT-based drug release systems. This research aimed to determine variations in electronic properties of anticancer LTZ drug in presences CCT. Then, the reactivity and stability behavior of LTZ drug and on CCT to be examined by density functional theory (DFT). Then, frontier molecular orbital (FMO) and noncovalent interaction (NCI) analyses were performed, which decrease in reactivity described increase in the stability of LTZ drug.
{"title":"The study of Letrozole adsorption upon CCT nanotube: A DFT/TD-DFT and spectroscopic (excited states and UV/Vis)","authors":"N. Masnabadi","doi":"10.3233/mgc-210098","DOIUrl":"https://doi.org/10.3233/mgc-210098","url":null,"abstract":"In this research, the geometric structure of LTZ and CCT (5,0) was optimized with B3LYP/6-31G * method using the Gaussian 09W program package to investigate the weak interaction of Letrozole (LTZ) and carbon carbon nanotube (CCT). According to the calculation of the release energy, it was found that the drug delivery process is desirable. Also, the structural properties of the title compounds were assessed by thermodynamic and frontier molecular orbital (FMO) parameters. In this study, a series of measures have been performed to detect changes in drug loading properties and non-bonding interactions between the LTZ and CCT (5,0) nanotube. The non-bonding interaction effects of LTZ and CCT over the electronic properties were also evaluated and argued. The research is based on the fact that studies can help to understand the interaction between the LTZ drug and CCT (5,0) nanotube and the development of CCT-based drug release systems. This research aimed to determine variations in electronic properties of anticancer LTZ drug in presences CCT. Then, the reactivity and stability behavior of LTZ drug and on CCT to be examined by density functional theory (DFT). Then, frontier molecular orbital (FMO) and noncovalent interaction (NCI) analyses were performed, which decrease in reactivity described increase in the stability of LTZ drug.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86278250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The selectivity of biocatalysts based on enzymes, eco-friendly reaction systems, and strong catalyst performance is exceptionally compelling. For improving enzyme recyclability and stability, a good option that has been proved is immobilization. For enzyme immobilization, hydrogel sodium polyacrylate combined with nanoparticles is an interesting class of support matrices as compared to others. This study synthesizes and uses the cross-linked hydrogel sodium polyacrylate-decorated gold or silver nanoparticles (HSP/AuNPs or AgNPs) as immobilized support for peroxidase and FTIR characterizes it. The novel supports immobilized system properties enhanced biocompatibility. They have attained a greater immobilization yield (91% with HSP/AuNPs and 84% with HSP/AgNPs). The rest of the immobilized peroxidase activity, after 10 recurring cycles of HSP/AuNPs was 61% and HSP/AgNPs was 54% . The remaining activity of the immobilized enzyme onto HSP/AgNPs, after storing at 4°C for 6 weeks, was 73% and HSP/AuNPs was 75% of its initial activity. It was revealed that the optimum temperature for the free enzyme and the immobilized enzyme was 50°C and 50–60°C, respectively. For the immobilized enzyme, the optimum pH is 7–7.5, as compared to the optimum pH of free enzyme pH 6.5.
{"title":"Encapsulation of peroxidase on hydrogel sodium polyacrylate spheres incorporated by silver and gold nanoparticles: A comparative study","authors":"Hassan A. H. Alzahrani","doi":"10.3233/mgc-220033","DOIUrl":"https://doi.org/10.3233/mgc-220033","url":null,"abstract":"The selectivity of biocatalysts based on enzymes, eco-friendly reaction systems, and strong catalyst performance is exceptionally compelling. For improving enzyme recyclability and stability, a good option that has been proved is immobilization. For enzyme immobilization, hydrogel sodium polyacrylate combined with nanoparticles is an interesting class of support matrices as compared to others. This study synthesizes and uses the cross-linked hydrogel sodium polyacrylate-decorated gold or silver nanoparticles (HSP/AuNPs or AgNPs) as immobilized support for peroxidase and FTIR characterizes it. The novel supports immobilized system properties enhanced biocompatibility. They have attained a greater immobilization yield (91% with HSP/AuNPs and 84% with HSP/AgNPs). The rest of the immobilized peroxidase activity, after 10 recurring cycles of HSP/AuNPs was 61% and HSP/AgNPs was 54% . The remaining activity of the immobilized enzyme onto HSP/AgNPs, after storing at 4°C for 6 weeks, was 73% and HSP/AuNPs was 75% of its initial activity. It was revealed that the optimum temperature for the free enzyme and the immobilized enzyme was 50°C and 50–60°C, respectively. For the immobilized enzyme, the optimum pH is 7–7.5, as compared to the optimum pH of free enzyme pH 6.5.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76051332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Cebecioglu, D. Akagunduz, H. Bermek, V. E. Atalay, T. Catal
Environmental pollution is increasing in parallel with the increase in the world population. Azo dyes are one of the most important causes of environmental pollution. Microbial electrochemical cells are biotechnological systems that generate energy from renewable sources such as electricity. This study investigated simultaneous electricity generation with the decolorization of two different azo dyes in microbial fuel cells. And also, changes in pH values, chemical oxygen demand analysis, hourly color removal rate, dye spectral scanning were investigated. Reactive Yellow 145 dye with a concentration of 10 mg/L, 20 mg/L, and 40 mg/L, and Ponceau S dye with 20 mg/L and 40 mg/L concentration were tested in microbial fuel cells, respectively. Results indicate that the maximum voltage obtained was 0.11 V at the same time as the 100% decolorization rate in Reactive Yellow 145 and was achieved at a concentration of 10 mg/L also, the maximum voltage obtained was 0.24 V at the same time as the 100% decolorization rate in Ponceau S. It was achieved at a concentration of 20 mg/L. In conclusion, microbial fuel cells appear to be promising tools in treating textile azo dye wastewaters, and computational methods can be applied to estimate the degradation mechanisms of complex organic molecules found in wastewaters.
{"title":"Decolorization mechanisms of reactive yellow 145 and ponceau S in microbial fuel cells during simultaneous electricity production","authors":"R. Cebecioglu, D. Akagunduz, H. Bermek, V. E. Atalay, T. Catal","doi":"10.3233/mgc-210180","DOIUrl":"https://doi.org/10.3233/mgc-210180","url":null,"abstract":"Environmental pollution is increasing in parallel with the increase in the world population. Azo dyes are one of the most important causes of environmental pollution. Microbial electrochemical cells are biotechnological systems that generate energy from renewable sources such as electricity. This study investigated simultaneous electricity generation with the decolorization of two different azo dyes in microbial fuel cells. And also, changes in pH values, chemical oxygen demand analysis, hourly color removal rate, dye spectral scanning were investigated. Reactive Yellow 145 dye with a concentration of 10 mg/L, 20 mg/L, and 40 mg/L, and Ponceau S dye with 20 mg/L and 40 mg/L concentration were tested in microbial fuel cells, respectively. Results indicate that the maximum voltage obtained was 0.11 V at the same time as the 100% decolorization rate in Reactive Yellow 145 and was achieved at a concentration of 10 mg/L also, the maximum voltage obtained was 0.24 V at the same time as the 100% decolorization rate in Ponceau S. It was achieved at a concentration of 20 mg/L. In conclusion, microbial fuel cells appear to be promising tools in treating textile azo dye wastewaters, and computational methods can be applied to estimate the degradation mechanisms of complex organic molecules found in wastewaters.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90826618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lina Majeed Haider Al-Haideri, N. Çakmak, Khalid Hadi Mahdi Aal-Shabeeb, A. Dhumad
By the importance of performing investigations on developing characteristic features of nano-based materials for assigning their further applications, this work was done to recognize such features for plutonium (Pu)-doped conical nanocarbons materials. Density functional theory (DFT) calculations were performed for providing information of this work. Three models of conical nanocarbons with disclination angles of 120, 180, and 240 degrees were investigated, in which the Pu atom was doped at the apex of conical structure yielding the models of PuNC120, PuNC180, and PuNC240. Accordingly, formations of four, three, and two PU–C chemical bonds were examined by considering such models systems. The results indicated the PuNC120 with four Pu–C bonds was the distinguished model of this work showing remarkable electronic and conductivity features. As a consequence, the models systems were recognized based on the structural and electronic features to be designated for further applications.
{"title":"DFT calculations of plutonium-doped conical nanocarbons: Exploring structural and electronic features","authors":"Lina Majeed Haider Al-Haideri, N. Çakmak, Khalid Hadi Mahdi Aal-Shabeeb, A. Dhumad","doi":"10.3233/mgc-220023","DOIUrl":"https://doi.org/10.3233/mgc-220023","url":null,"abstract":"By the importance of performing investigations on developing characteristic features of nano-based materials for assigning their further applications, this work was done to recognize such features for plutonium (Pu)-doped conical nanocarbons materials. Density functional theory (DFT) calculations were performed for providing information of this work. Three models of conical nanocarbons with disclination angles of 120, 180, and 240 degrees were investigated, in which the Pu atom was doped at the apex of conical structure yielding the models of PuNC120, PuNC180, and PuNC240. Accordingly, formations of four, three, and two PU–C chemical bonds were examined by considering such models systems. The results indicated the PuNC120 with four Pu–C bonds was the distinguished model of this work showing remarkable electronic and conductivity features. As a consequence, the models systems were recognized based on the structural and electronic features to be designated for further applications.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76389966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Afsaneh Barekat, B. S. Hadavand, A. Rayatzadeh, R. Badri
Nowadays, different structures of organic macrocyclic compounds are considered because of their attractive applications. One of the main problems in the synthesis of these materials is their long reaction time but low reaction yield. The use of catalysts can be effective in solving this problem. Among the catalysts, nano-copper chromite can be a good choice due to its good performance in the synthesis of organic compounds. In addition, the Response Surface Methodology was used to investigate the effective parameters in the synthesis more precisely. Based on the previous results of the synthesis and experiments, the catalyst content from 0% to 5% to raw material and reaction time between 24 and 96 h was chosen for the design of the experiment. After determining the reaction yield results, a suitable model was selected and its accuracy was evaluated. Results showed for yields above 95% with minimum catalyst (2.29%) the reaction time of 88 h and for minimum time (65 h), 3.85% of the catalyst is required. This yield with copper chromite nanocatalysts approximately compared to conventional methods for the synthesis of calix[4]resorcinarene was doubled.
{"title":"Optimization in synthesize of organic macrocyclic compounds in presence of nano copper chromite catalyst","authors":"Afsaneh Barekat, B. S. Hadavand, A. Rayatzadeh, R. Badri","doi":"10.3233/mgc-210161","DOIUrl":"https://doi.org/10.3233/mgc-210161","url":null,"abstract":"Nowadays, different structures of organic macrocyclic compounds are considered because of their attractive applications. One of the main problems in the synthesis of these materials is their long reaction time but low reaction yield. The use of catalysts can be effective in solving this problem. Among the catalysts, nano-copper chromite can be a good choice due to its good performance in the synthesis of organic compounds. In addition, the Response Surface Methodology was used to investigate the effective parameters in the synthesis more precisely. Based on the previous results of the synthesis and experiments, the catalyst content from 0% to 5% to raw material and reaction time between 24 and 96 h was chosen for the design of the experiment. After determining the reaction yield results, a suitable model was selected and its accuracy was evaluated. Results showed for yields above 95% with minimum catalyst (2.29%) the reaction time of 88 h and for minimum time (65 h), 3.85% of the catalyst is required. This yield with copper chromite nanocatalysts approximately compared to conventional methods for the synthesis of calix[4]resorcinarene was doubled.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83752587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
By the importance of exploring anti-cancer properties of thioguanine (TG), the relationships between quantum chemical indices and lipophilicity of TG tautomers were investigated using the quantitative structure-property relationship (QSPR) approach in two isolated and chitosan-encapsulated states. Accordingly, twenty numbers of different tautomeric forms of TG were selected to predict the logP using the QSPR models. Density functional theory (DFT) calculations along with Dragon package were applied to estimate the required quantum chemical descriptors. The Pearson correlation coefficient statistical test and Kennard-Stone algorithm were used to measure the statistical relationship and data splitting into training and testing set, respectively. Furthermore, the multiple linear regression (MLR) and artificial neural network (ANN) methods were employed for generating the models. In this regard, the analysis of variance (ANOVA) was used to form a basis criterion for testing the significance of MLR and ANN results. Moreover, the leave one out (LOO) method was used for examining the prediction efficiency of select models. The obtained result indicated benefits of proposed models for predicting reliable results of logP.
{"title":"The artificial neural network-based QSPR and DFT prediction of lipophilicity for thioguanine","authors":"Somaye Mir Mohammad Hoseini Ahari, M. Mirzaei","doi":"10.3233/mgc-220008","DOIUrl":"https://doi.org/10.3233/mgc-220008","url":null,"abstract":"By the importance of exploring anti-cancer properties of thioguanine (TG), the relationships between quantum chemical indices and lipophilicity of TG tautomers were investigated using the quantitative structure-property relationship (QSPR) approach in two isolated and chitosan-encapsulated states. Accordingly, twenty numbers of different tautomeric forms of TG were selected to predict the logP using the QSPR models. Density functional theory (DFT) calculations along with Dragon package were applied to estimate the required quantum chemical descriptors. The Pearson correlation coefficient statistical test and Kennard-Stone algorithm were used to measure the statistical relationship and data splitting into training and testing set, respectively. Furthermore, the multiple linear regression (MLR) and artificial neural network (ANN) methods were employed for generating the models. In this regard, the analysis of variance (ANOVA) was used to form a basis criterion for testing the significance of MLR and ANN results. Moreover, the leave one out (LOO) method was used for examining the prediction efficiency of select models. The obtained result indicated benefits of proposed models for predicting reliable results of logP.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88485721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This work aims to prepare and characterize the hydroxyapatite (HAP) nanomaterials from marble wastes (the utilization of the building marble waste for reducing the environmental pollution hazards) and to study its capabilities as antimicrobial and antifungal agents of the prepared nanoparticle. The utilization of the marble waste as a source for calcium chloride and to be reacted with sodium hydrogen phosphate, for synthetization of hydroxyapatite nanoparticles, the prepared material is characterized, tested, and analyzed using X-ray diffraction (XRD), Scan Electron Microscope (SEM) with Energy Dispersive X-Ray analysis (EDAX) techniques. The antimicrobial activity of prepared hydroxyapatite nanomaterial is tested using a well diffusion method with different types of bacteria (Gram-negative): Escherichia. Coli, Salmonella paratyphi, Pseudomonas earuginosa, and Alcaligenes aquatilis and bacteria (Gram- positive): Staphylococcus aureus, and Streptococcacea pneumonia. The antifungal efficacy of HAP nanoparticles is tested for different species of Aspergillus niger, Aspergillus flavus, and Penicillium SP. The diameter of the inhibitory zone shows the sensitivity of the microorganism to HAP nanoparticles in a greater inhibition against Gram- positive Staphylococcus aureus and Streptococcacea pneumonia, at 100% DMSO concentration. The diameter of the inhibition zone was 03.70 mm, when compared with other types of bacteria. The diameter of the inhibitory zone showed the sensitivity of the microorganism to HAP nanoparticles in a greater inhibition against Penicillium SP at 100% DMSO concentration, the inhibition zone diameter was 2.20 mm, when compared with other Aspergillus niger and Aspergillus flavus fungal species. Based on obtained results for the HAP nanoparticles prepared from the marble wastes have antibacterial effects on both Gram-negative (E. coli) and Gram-positive (S. aureus) strains.
{"title":"Antimicrobial activity of Hydroxyapatite nanoparticles prepared from marble wastes","authors":"Y. Algamal, N. M. Khalil, A. Saddiq, A. Baghdadi","doi":"10.3233/mgc-210181","DOIUrl":"https://doi.org/10.3233/mgc-210181","url":null,"abstract":"This work aims to prepare and characterize the hydroxyapatite (HAP) nanomaterials from marble wastes (the utilization of the building marble waste for reducing the environmental pollution hazards) and to study its capabilities as antimicrobial and antifungal agents of the prepared nanoparticle. The utilization of the marble waste as a source for calcium chloride and to be reacted with sodium hydrogen phosphate, for synthetization of hydroxyapatite nanoparticles, the prepared material is characterized, tested, and analyzed using X-ray diffraction (XRD), Scan Electron Microscope (SEM) with Energy Dispersive X-Ray analysis (EDAX) techniques. The antimicrobial activity of prepared hydroxyapatite nanomaterial is tested using a well diffusion method with different types of bacteria (Gram-negative): Escherichia. Coli, Salmonella paratyphi, Pseudomonas earuginosa, and Alcaligenes aquatilis and bacteria (Gram- positive): Staphylococcus aureus, and Streptococcacea pneumonia. The antifungal efficacy of HAP nanoparticles is tested for different species of Aspergillus niger, Aspergillus flavus, and Penicillium SP. The diameter of the inhibitory zone shows the sensitivity of the microorganism to HAP nanoparticles in a greater inhibition against Gram- positive Staphylococcus aureus and Streptococcacea pneumonia, at 100% DMSO concentration. The diameter of the inhibition zone was 03.70 mm, when compared with other types of bacteria. The diameter of the inhibitory zone showed the sensitivity of the microorganism to HAP nanoparticles in a greater inhibition against Penicillium SP at 100% DMSO concentration, the inhibition zone diameter was 2.20 mm, when compared with other Aspergillus niger and Aspergillus flavus fungal species. Based on obtained results for the HAP nanoparticles prepared from the marble wastes have antibacterial effects on both Gram-negative (E. coli) and Gram-positive (S. aureus) strains.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85716613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bothaina Saadi, S. Rahmane, Mouloud Laidoudi, Aicha Kater
In this paper, Cr2O3 thin films were synthesized successfully on glass substrates at 450 °C using a simple and low-cost homemade pneumatic spray system (SP) using two different precursors: chromium chloride and chromium nitrate. A systematic study of the influence of concentration of each precursor used for deposition on the structural, morphological, optical and electrical properties has investigated. The XRDresults show that the Cr2O3 films prepared with chromium chloride are polycrystalline with rhombohedral structure and those prepared with low concentration of chromium nitrate have a poor crystallinity. Peaks associated with Cr and O elements are present in EDS analysis that confirm the composition of the films and SEM images revealed a uniform, homogeneous and well covered surface.The measured electrical conductivity was found in the order of 5(Ω.cm)–1. The average transmittance of the films deposited from chromium nitrate is in the range of 60 % and for the films deposited from chromium chloride, it reaches75 % in the visible region. These electrical and optical properties of Cr2O3 thin film ascribed to its wide band gap, are indeed required for optoelectronic devices especially for solar cell window.
{"title":"Influence of concentration of different chemical precursors on the physical properties of Cr2O3 thin films elaborated via pneumatic spray","authors":"Bothaina Saadi, S. Rahmane, Mouloud Laidoudi, Aicha Kater","doi":"10.3233/mgc-210137","DOIUrl":"https://doi.org/10.3233/mgc-210137","url":null,"abstract":"In this paper, Cr2O3 thin films were synthesized successfully on glass substrates at 450 °C using a simple and low-cost homemade pneumatic spray system (SP) using two different precursors: chromium chloride and chromium nitrate. A systematic study of the influence of concentration of each precursor used for deposition on the structural, morphological, optical and electrical properties has investigated. The XRDresults show that the Cr2O3 films prepared with chromium chloride are polycrystalline with rhombohedral structure and those prepared with low concentration of chromium nitrate have a poor crystallinity. Peaks associated with Cr and O elements are present in EDS analysis that confirm the composition of the films and SEM images revealed a uniform, homogeneous and well covered surface.The measured electrical conductivity was found in the order of 5(Ω.cm)–1. The average transmittance of the films deposited from chromium nitrate is in the range of 60 % and for the films deposited from chromium chloride, it reaches75 % in the visible region. These electrical and optical properties of Cr2O3 thin film ascribed to its wide band gap, are indeed required for optoelectronic devices especially for solar cell window.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84125788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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