Pub Date : 2023-09-15DOI: 10.2174/2666145417666230915103802
Samidha Shelar, Subhalaxmi Pradhan, Chandu S. Madankar
Abstract: Tea tree oil (TTO) is a widely known essential oil extracted from Melaleuca alternifolia leaves naturally having antimicrobial and antibacterial activities. Tea tree oil is widely used in a variety of industries, including agrochemicals, pharmaceuticals, medicine, food, textiles, as well as cosmetic and hygiene products. To overcome the limitation of tea tree oil being highly volatile and reactive, microencapsulation has become one of the preferred methods to retain and control these compounds. This review explores the different techniques for encapsulating tea tree oil. Along with a comprehensive overview of the most recent research and applications of microencapsulated tea tree oil, microencapsulation techniques and the available technologies are also discussed.
{"title":"An Approach For Microencapsulation Of Melaleuca alternifolia Oil Using Different Techniques And Its Application","authors":"Samidha Shelar, Subhalaxmi Pradhan, Chandu S. Madankar","doi":"10.2174/2666145417666230915103802","DOIUrl":"https://doi.org/10.2174/2666145417666230915103802","url":null,"abstract":"Abstract: Tea tree oil (TTO) is a widely known essential oil extracted from Melaleuca alternifolia leaves naturally having antimicrobial and antibacterial activities. Tea tree oil is widely used in a variety of industries, including agrochemicals, pharmaceuticals, medicine, food, textiles, as well as cosmetic and hygiene products. To overcome the limitation of tea tree oil being highly volatile and reactive, microencapsulation has become one of the preferred methods to retain and control these compounds. This review explores the different techniques for encapsulating tea tree oil. Along with a comprehensive overview of the most recent research and applications of microencapsulated tea tree oil, microencapsulation techniques and the available technologies are also discussed.","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135485370","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 : 2023-09-14DOI: 10.2174/2666145417666230914104249
Mustapha Dib, Marieme Kacem, Nazrizawati A. Tajuddin
Abstract: The increasing prevalence of hazardous pollutants in water poses a significant global threat to the environment and human health. To address this issue, various methodologies have been developed for the determination and removal of harmful contaminants, with layered double hydroxides (LDHs)-based materials emerging as promising adsorbents. This review focuses on recent advancements in the application of LDHs-based materials for the removal of specific harmful pollutants, such as selenium, fluoride, heavy metals, and organic dyes, from aqueous solutions. Heavy metals and organic dyes, in particular, are major contributors to environmental pollution, necessitating effective and eco-friendly treatment methods.
{"title":"Recent progress in layered double hydroxides-based materials as sustainable nanoadsorbents for hazardous pollutants recovery from aqueous medium","authors":"Mustapha Dib, Marieme Kacem, Nazrizawati A. Tajuddin","doi":"10.2174/2666145417666230914104249","DOIUrl":"https://doi.org/10.2174/2666145417666230914104249","url":null,"abstract":"Abstract: The increasing prevalence of hazardous pollutants in water poses a significant global threat to the environment and human health. To address this issue, various methodologies have been developed for the determination and removal of harmful contaminants, with layered double hydroxides (LDHs)-based materials emerging as promising adsorbents. This review focuses on recent advancements in the application of LDHs-based materials for the removal of specific harmful pollutants, such as selenium, fluoride, heavy metals, and organic dyes, from aqueous solutions. Heavy metals and organic dyes, in particular, are major contributors to environmental pollution, necessitating effective and eco-friendly treatment methods.","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134970674","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 : 2023-09-05DOI: 10.2174/2666145417666230905150410
Kai Zheng, Cuilian Shi, Jierui Li, Xiangdong Su
Introduction: The nanoporous carbide-derived carbon (CDC) have been prepared by electrochemical etching of SiC in molten CaCl2 at 900 ºC for 15 h in argon at an applied constant voltage of 3.0 V. SiC powder was pressed to form a pellet which was then served as the anode, and a graphite rod was used as the cathode Method: The results show that the obtained SiC-CDC is a mixture of amorphous carbon and ordered graphite phase with a highly degree of graphitization. The Raman analysis confirms that the ID/IG ratio of the CDC nanosheets is 0.46, indicating a lower degree of graphitization. Result: The layered CDC nanosheets possess a specific surface area of 561.39 m2/g and a total pore volume of 0.39 cm3/g with an average pore diameter of 2.8 nm. Conclusion: It is suggested that the molten salt electrochemical etching process is a novel method for the production of porous carbon material, and has the penitential to be used for a variety of applications.
{"title":"Synthesis and characterisation of porous carbide-derived carbon from SiC in Molten Salt","authors":"Kai Zheng, Cuilian Shi, Jierui Li, Xiangdong Su","doi":"10.2174/2666145417666230905150410","DOIUrl":"https://doi.org/10.2174/2666145417666230905150410","url":null,"abstract":"Introduction: The nanoporous carbide-derived carbon (CDC) have been prepared by electrochemical etching of SiC in molten CaCl2 at 900 ºC for 15 h in argon at an applied constant voltage of 3.0 V. SiC powder was pressed to form a pellet which was then served as the anode, and a graphite rod was used as the cathode Method: The results show that the obtained SiC-CDC is a mixture of amorphous carbon and ordered graphite phase with a highly degree of graphitization. The Raman analysis confirms that the ID/IG ratio of the CDC nanosheets is 0.46, indicating a lower degree of graphitization. Result: The layered CDC nanosheets possess a specific surface area of 561.39 m2/g and a total pore volume of 0.39 cm3/g with an average pore diameter of 2.8 nm. Conclusion: It is suggested that the molten salt electrochemical etching process is a novel method for the production of porous carbon material, and has the penitential to be used for a variety of applications.","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135362253","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 : 2023-09-04DOI: 10.2174/2666145417666230904122507
A. Vasanthanathan, U. P. S. Narayanan, K. Amudhan
Polymer matrix composites have been utilized in various industries due to their low cost and good strength-to-weight ratios. AIM: This study aims to investigate the effectiveness of filament-wound fiber-reinforced polymer composite pipes. The focus is on aluminized fabric tubes, which are flexible and heat-resistant tubes made from a glass fabric and laminated with a layer of aluminum. These tubes offer unique properties that make them suitable for various applications, especially in environments with high temperatures or exposure to radiant heat. Fiber Reinforced Plastic (FRP) pipes are highlighted for their lightweight, easy transportation, low maintenance, corrosion resistance, design flexibility, and anti-freezing performance. The study delves into the use of aluminized glass fiber for high-temperature applications, with a specific focus on enhancing high-temperature withstanding properties. In addition, the present research also conducts tests to study the structural strength of normal glass fabric tubes and aluminized glass fabric tubes. The fabrication of composite pipes is achieved through a filament winding process with a zero-degree winding angle using a manually operated filament winding machine. Mechanical testing and Finite Element Analysis (FEA) simulations using ANSYS® are also performed to compare glass fiber-reinforced plastic pipes with hybrid aluminized fiber-reinforced plastic pipes. The application of aluminized glass fiber in both the internal and external layers of the pipes improves the pipe’s strength and ability to endure high temperatures.
{"title":"Hybrid Aluminized Fiberglass Reinforced Composite Pipes: A Framework for Safety Use in Industries","authors":"A. Vasanthanathan, U. P. S. Narayanan, K. Amudhan","doi":"10.2174/2666145417666230904122507","DOIUrl":"https://doi.org/10.2174/2666145417666230904122507","url":null,"abstract":"\u0000\u0000Polymer matrix composites have been utilized in various industries due to their low cost and good strength-to-weight ratios. AIM: This study aims to investigate the effectiveness of filament-wound fiber-reinforced polymer composite pipes. The focus is on aluminized fabric tubes, which are flexible and heat-resistant tubes made from a glass fabric and laminated with a layer of aluminum.\u0000\u0000\u0000\u0000These tubes offer unique properties that make them suitable for various applications, especially in environments with high temperatures or exposure to radiant heat. Fiber Reinforced Plastic (FRP) pipes are highlighted for their lightweight, easy transportation, low maintenance, corrosion resistance, design flexibility, and anti-freezing performance. The study delves into the use of aluminized glass fiber for high-temperature applications, with a specific focus on enhancing high-temperature withstanding properties.\u0000\u0000\u0000\u0000In addition, the present research also conducts tests to study the structural strength of normal glass fabric tubes and aluminized glass fabric tubes. The fabrication of composite pipes is achieved through a filament winding process with a zero-degree winding angle using a manually operated filament winding machine. Mechanical testing and Finite Element Analysis (FEA) simulations using ANSYS® are also performed to compare glass fiber-reinforced plastic pipes with hybrid aluminized fiber-reinforced plastic pipes.\u0000\u0000\u0000\u0000The application of aluminized glass fiber in both the internal and external layers of the pipes improves the pipe’s strength and ability to endure high temperatures.\u0000","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76462053","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 : 2023-09-04DOI: 10.2174/2666145417666230904150858
Bilkisu Ibrahim Goni, Sonali Sundram, Rishav Sharma
Many industries use polysaccharide materials, such as those dealing with food, food packaging, medicine delivery, tissue engineering, wound dressing, wastewater treatment, and bioremediation. They were implemented in these spheres because of their efficacy, low cost, non-toxicity, biocompatibility, and biodegradability. It's well-known that many quick and easy techniques can be used to synthesize polysaccharides successfully. Nanotechnology and biotechnology have combined to create nanoparticles that are effective carriers for a wide range of medicines. Numerous researchers in the field of drug delivery are interested in polysaccharides because of their countless desirable properties, including biocompatibility, biodegradability, low toxicity, and amenability to modification. Gene delivery nanoparticles can be prepared from a variety of polysaccharides and their derivatives, with chitosan, hyaluronic acid, and dextran being popular choices. This manuscript provides an overview of the chemical and physical properties of polysaccharides that are of particular interest for use in biomedical applications and then discusses recent advances in the production of polysaccharide-based nanoparticles for gene delivery.
{"title":"Utilization of Polysaccharides-Based Nanoparticles for Gene Delivery: Advances and Prospective","authors":"Bilkisu Ibrahim Goni, Sonali Sundram, Rishav Sharma","doi":"10.2174/2666145417666230904150858","DOIUrl":"https://doi.org/10.2174/2666145417666230904150858","url":null,"abstract":"\u0000\u0000Many industries use polysaccharide materials, such as those dealing with food, food packaging, medicine delivery, tissue engineering, wound dressing, wastewater treatment, and bioremediation. They were implemented in these spheres because of their efficacy, low cost, non-toxicity, biocompatibility, and biodegradability. It's well-known that many quick and easy techniques can be used to synthesize polysaccharides successfully. Nanotechnology and biotechnology have combined to create nanoparticles that are effective carriers for a wide range of medicines. Numerous researchers in the field of drug delivery are interested in polysaccharides because of their countless desirable properties, including biocompatibility, biodegradability, low toxicity, and amenability to modification. Gene delivery nanoparticles can be prepared from a variety of polysaccharides and their derivatives, with chitosan, hyaluronic acid, and dextran being popular choices. This manuscript provides an overview of the chemical and physical properties of polysaccharides that are of particular interest for use in biomedical applications and then discusses recent advances in the production of polysaccharide-based nanoparticles for gene delivery.\u0000","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"267 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72929103","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}
Benzoic acid is widely applied in the food field, including beverages as the antimicrobial preservative due to its strong inhabitation role to bacteria and yeasts. However, excessive intake of benzoic acid can easily cause abdominal pain and diarrhea and can even result in metabolic diseases. Hence, it is important to seek simple, accurate and sensitive strategies to detect low-trace benzoic acid. The aim of this study is to synthesize dysprosium oxide/bismuth oxide nanocomposites using dysprosium sulphate and sodium bismuthate as the raw materials and research the electrochemical sensing properties for the detection of benzoic acid. Dysprosium oxide/bismuth oxide nanocomposites were synthesized by a facile hydrothermal route. The dysprosium oxide/bismuth oxide nanocomposites were characterized by X-ray diffraction, electron microscopy, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy. The dysprosium oxide/bismuth oxide nanocomposites are composed of nearly circular-shaped particles with polycrystalline cubic Dy2O3 and triclinic Bi2O3 phases. The size of the nearly circular-shaped particles is about 50 to 200 nm. The electrons are easier to transfer by the dysprosium oxide/bismuth oxide nanocomposite-modified electrode than the bare electrode. A pair of quasi-reversible cyclic voltammetry (CV) peaks located at -0.155 V and -0.582 V exist in the CV curve of 0.1 M KCl buffer solution containing 2 mM benzoic acid. The nanocomposite-modified electrode shows a linear detection range and detection limit of 0.001-2 mM and 0.18 μM, respectively, for benzoic acid detection. The dysprosium oxide/bismuth oxide nanocomposite-modified electrode reveals superior electro-catalytic activity towards benzoic acid.
{"title":"Facile synthesis of dysprosium oxide/bismuth oxide nanocomposite electrode materials with good electrocatalytic performance","authors":"Zizhan Sun, Xiaoyu Wang, Qianmin Cong, Chenxu Feng, Xu Zhang, Zhengyu Cai, Yong Zhang, Lizhai Pei","doi":"10.2174/2666145417666230831114021","DOIUrl":"https://doi.org/10.2174/2666145417666230831114021","url":null,"abstract":"\u0000\u0000Benzoic acid is widely applied in the food field, including beverages as the antimicrobial preservative due to its strong inhabitation role to bacteria and yeasts. However, excessive intake of benzoic acid can easily cause abdominal pain and diarrhea and can even result in metabolic diseases. Hence, it is important to seek simple, accurate and sensitive strategies to detect low-trace benzoic acid.\u0000\u0000\u0000\u0000The aim of this study is to synthesize dysprosium oxide/bismuth oxide nanocomposites using dysprosium sulphate and sodium bismuthate as the raw materials and research the electrochemical sensing properties for the detection of benzoic acid.\u0000\u0000\u0000\u0000Dysprosium oxide/bismuth oxide nanocomposites were synthesized by a facile hydrothermal route. The dysprosium oxide/bismuth oxide nanocomposites were characterized by X-ray diffraction, electron microscopy, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy.\u0000\u0000\u0000\u0000The dysprosium oxide/bismuth oxide nanocomposites are composed of nearly circular-shaped particles with polycrystalline cubic Dy2O3 and triclinic Bi2O3 phases. The size of the nearly circular-shaped particles is about 50 to 200 nm. The electrons are easier to transfer by the dysprosium oxide/bismuth oxide nanocomposite-modified electrode than the bare electrode. A pair of quasi-reversible cyclic voltammetry (CV) peaks located at -0.155 V and -0.582 V exist in the CV curve of 0.1 M KCl buffer solution containing 2 mM benzoic acid. The nanocomposite-modified electrode shows a linear detection range and detection limit of 0.001-2 mM and 0.18 μM, respectively, for benzoic acid detection.\u0000\u0000\u0000\u0000The dysprosium oxide/bismuth oxide nanocomposite-modified electrode reveals superior electro-catalytic activity towards benzoic acid.\u0000","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75561443","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 : 2023-08-25DOI: 10.2174/2666145417666230825163555
P. Chamoli, Anuskha Kala, Dr Rashmi Verma, M. Meenu, L. Gambhir, K. Kar
Many pathogenic microorganisms, including bacteria, viruses, and fungi, which are common sources of disease and infection in both humans and animals, have a significant impact on human health. To combat these microorganisms, scientists and technicians are steadily attempting to develop novel and potent antimicrobial agents. Recently, graphene nanosheets (GNs) based nanocomposites (NCs) have shown promising potential as antibacterial activity against microorganisms. The present is an attempt to examine the antimicrobial effect of Silver (Ag)/GNs NCs against gram-positive (Bacillus thuringiensis, Staphylococcus aureus, and Enterococcus faecalis) and gram-negative (Salmonella typhi) bacteria. In this study, Ag/GNs NCs have been synthesized by the solvothermal method. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), UV-vis spectroscopy, field emission scanning electron microscopy (FESEM), and X-ray photoelectron spectroscopy have all been used to study the Ag/GNs NCs. The antibacterial activity of synthesized GO and Ag/GNs NCs was evaluated against microorganisms using the disk diffusion method. The elemental analysis of synthesized nanomaterial revealed that GO and Ag ions have been reduced by citric acid, and led to the successful formation of Ag/GNs NCs. The resultant NCs have been examined for their antibacterial activity against gram-positive (Bacillus thuringiensis, Staphylococcus aureus, and Enterococcus faecalis) and gram-negative (Salmonella typhi) bacteria. It was observed that Ag/GNs NCs markedly inhibit gram-positive and gram-negative bacteria. The prepared Ag/GNs NCs have the potential for long-term gram-positive and gram-negative bacteria-targeting antibacterial activities and grasp the ability in combating public health threats.
{"title":"Antibacterial activity of Ag-graphene nanocomposites against Gram-Positive and Gram-negative bacteria","authors":"P. Chamoli, Anuskha Kala, Dr Rashmi Verma, M. Meenu, L. Gambhir, K. Kar","doi":"10.2174/2666145417666230825163555","DOIUrl":"https://doi.org/10.2174/2666145417666230825163555","url":null,"abstract":"\u0000\u0000Many pathogenic microorganisms, including bacteria, viruses, and fungi, which are common sources of disease and infection in both humans and animals, have a significant impact on human health. To combat these microorganisms, scientists and technicians are steadily attempting to develop novel and potent antimicrobial agents. Recently, graphene nanosheets (GNs) based nanocomposites (NCs) have shown promising potential as antibacterial activity against microorganisms. The present is an attempt to examine the antimicrobial effect of Silver (Ag)/GNs NCs against gram-positive (Bacillus thuringiensis, Staphylococcus aureus, and Enterococcus faecalis) and gram-negative (Salmonella typhi) bacteria.\u0000\u0000\u0000\u0000In this study, Ag/GNs NCs have been synthesized by the solvothermal method. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), UV-vis spectroscopy, field emission scanning electron microscopy (FESEM), and X-ray photoelectron spectroscopy have all been used to study the Ag/GNs NCs. The antibacterial activity of synthesized GO and Ag/GNs NCs was evaluated against microorganisms using the disk diffusion method.\u0000\u0000\u0000\u0000The elemental analysis of synthesized nanomaterial revealed that GO and Ag ions have been reduced by citric acid, and led to the successful formation of Ag/GNs NCs. The resultant NCs have been examined for their antibacterial activity against gram-positive (Bacillus thuringiensis, Staphylococcus aureus, and Enterococcus faecalis) and gram-negative (Salmonella typhi) bacteria. It was observed that Ag/GNs NCs markedly inhibit gram-positive and gram-negative bacteria.\u0000\u0000\u0000\u0000The prepared Ag/GNs NCs have the potential for long-term gram-positive and gram-negative bacteria-targeting antibacterial activities and grasp the ability in combating public health threats.\u0000","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79108396","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 : 2023-08-23DOI: 10.2174/2666145417666230823111030
M. Bajad, Yogini V. Deshpande
Our country has dramatically evolved over the decades, and now we have a large number of well-connected roads, public buildings and a rising number of automobiles. With the passage of time, the manual car parking system in commercial spaces has become a stumbling block and wastes time. As a result, it requires a solution that can address these issues. Automated car parking systems are the answer to these issues. In this study, the static and dynamic response spectrum approach was used to analyze G+13 storey automated car parking by using ETABS-2018 systems The storey displacement, storey stiffness, storey shear and overturning moment of steel and Reinforced cement concrete (RCC) automated car parking tower subjected to static and dynamic load for seismic zone III and zone IV in India have been determined. The RCC automated car parking tower was found to be not only stiffer but also lowered the displacement of construction
{"title":"Static and Dynamic Analysis of Automated Car Parking Tower Systems","authors":"M. Bajad, Yogini V. Deshpande","doi":"10.2174/2666145417666230823111030","DOIUrl":"https://doi.org/10.2174/2666145417666230823111030","url":null,"abstract":"\u0000\u0000Our country has dramatically evolved over the decades, and now we have a large number of well-connected roads, public buildings and a rising number of automobiles. With the passage of time, the manual car parking system in commercial spaces has become a stumbling block and wastes time. As a result, it requires a solution that can address these issues. Automated car parking systems are the answer to these issues.\u0000\u0000\u0000\u0000In this study, the static and dynamic response spectrum approach was used to analyze G+13 storey automated car parking by using ETABS-2018 systems\u0000\u0000\u0000\u0000The storey displacement, storey stiffness, storey shear and overturning moment of steel and Reinforced cement concrete (RCC) automated car parking tower subjected to static and dynamic load for seismic zone III and zone IV in India have been determined.\u0000\u0000\u0000\u0000The RCC automated car parking tower was found to be not only stiffer but also lowered the displacement of construction\u0000","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89002790","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 : 2023-08-23DOI: 10.2174/2666145417666230823094321
Qizhen Shen, Gaoxiang Lou
The influence of carbonation on the interfacial transition zone (ITZ) microstructure of cement-based materials was significant. However, the width of ITZ is about tens of microns, and studying its micro-characteristics (such as porosity, hydration products, content of unhydrated cement, etc.) by macro test was difficult. Backscattered electron (BSE) imaging technology and gray scale analysis method were used to analyze the cement-based materials with water-binder (W/B) ratios of 0.53 and 0.35, respectively. BSE and gray scale analysis showed that in the ITZ, the porosity of 0.53P (Portland cement paste), 0.35P (Portland cement paste), 0.53F (fly ash), and 0.35F (fly ash) decreased by 24.1%, 28.9%, 49.5%, and 64.2% respectively, whereas the content of hydration products increases after carbonation, and the matrix also shows the same rule. At the same time, the smaller W/B ratio, the greater the porosity reduction, and the filling effect of carbonation on the specimens with supplementary cementitious material (SCM) was more significant than that of pure cement specimens. The porosity of the ITZ decreased after carbonation, however it remained higher than that of the matrix. Consequently, the ITZ remained a vulnerable zone with a greater diffusion rate of CO2 compared to the matrix even after carbonation.
{"title":"Study on the Influence of Carbonation on the Microstructure of Cement-based Materials Based on BSE Technique","authors":"Qizhen Shen, Gaoxiang Lou","doi":"10.2174/2666145417666230823094321","DOIUrl":"https://doi.org/10.2174/2666145417666230823094321","url":null,"abstract":"\u0000\u0000The influence of carbonation on the interfacial transition zone (ITZ) microstructure of cement-based materials was significant. However, the width of ITZ is about tens of microns, and studying its micro-characteristics (such as porosity, hydration products, content of unhydrated cement, etc.) by macro test was difficult.\u0000\u0000\u0000\u0000Backscattered electron (BSE) imaging technology and gray scale analysis method were used to analyze the cement-based materials with water-binder (W/B) ratios of 0.53 and 0.35, respectively.\u0000\u0000\u0000\u0000BSE and gray scale analysis showed that in the ITZ, the porosity of 0.53P (Portland cement paste), 0.35P (Portland cement paste), 0.53F (fly ash), and 0.35F (fly ash) decreased by 24.1%, 28.9%, 49.5%, and 64.2% respectively, whereas the content of hydration products increases after carbonation, and the matrix also shows the same rule. At the same time, the smaller W/B ratio, the greater the porosity reduction, and the filling effect of carbonation on the specimens with supplementary cementitious material (SCM) was more significant than that of pure cement specimens.\u0000\u0000\u0000\u0000The porosity of the ITZ decreased after carbonation, however it remained higher than that of the matrix. Consequently, the ITZ remained a vulnerable zone with a greater diffusion rate of CO2 compared to the matrix even after carbonation.\u0000","PeriodicalId":36699,"journal":{"name":"Current Materials Science","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90953224","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 : 2023-08-23DOI: 10.2174/2666145417666230823091126
S. Santos, O. Rodrigues, L. Campos
Ceria (CeO2) belongs to rare-earth series and due to its profitable properties, presents a wide commercial use such as catalysis, energy, biological, biomedical, and pharmaceutical. The features of the starting materials in the form of free powders influence notably the processing, formation, as well as characteristics of the final structuresbodies obtained by colloidal processing. This study aims to characterize CeO2 powders. The results obtained are worthwhile data to advance toward new rare-earth based materials for radiation dosimetry. CeO2 powders were evaluated by the following techniques: PCS, SEM, XRD, FT-IR, EPR, IPC, and pycnometric density (ρ). The stability of particles in aqueous solvent was evaluated by zeta potential (ζ) determination. CeO2 powders exhibited cubic C-type form, Fm-3m space group, a mean particle size (d50) of 19.3nm, and a pycnometric density (ρ) of 7.01g.cm-3. Based on the results of zeta potential determination, CeO2 powders exhibited high stability at pH 6.4 with ζ-value of |34.0|mV. The evaluation of CeO2 powders was reported. The results presented and discussed in this study contribute to advance in the search of new rare-earth based materials for radiation dosimetry.
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