Pub Date : 2020-10-26DOI: 10.15406/MSEIJ.2020.04.00140
M. Frechero, Marianela Zoratti, M. E. Centurión
In this work a modified glassy micro-particles glucose sensor was developed applying a new and effective procedure to anchor glucose oxidase on glassy micro particles using urea medium. The resulting sensor, in the presence of glucose, generates a color development in 60 seconds working at room temperature. The intensity of the resulting color shows a straightforward relationship with the glucose concentration in the samples tested. The resulting biosensor was tested to demonstrate its sensibility on dissolutions of glucose and honey.
{"title":"An innovative method for anchoring glucose-sensing molecules on glassy micro-particles","authors":"M. Frechero, Marianela Zoratti, M. E. Centurión","doi":"10.15406/MSEIJ.2020.04.00140","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00140","url":null,"abstract":"In this work a modified glassy micro-particles glucose sensor was developed applying a new and effective procedure to anchor glucose oxidase on glassy micro particles using urea medium. The resulting sensor, in the presence of glucose, generates a color development in 60 seconds working at room temperature. The intensity of the resulting color shows a straightforward relationship with the glucose concentration in the samples tested. The resulting biosensor was tested to demonstrate its sensibility on dissolutions of glucose and honey.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88379390","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 : 2020-08-13DOI: 10.15406/MSEIJ.2020.04.00136
Quiroga Me, L. da, Cagnola Ea, Á. Mastalir, T. Szabó, J. Paredes, L. MartínezBovier, C. Betti
Graphite oxide (GO) was used to anchor [PdCl 2 (TDA) 2 ] and [RhCl(TDA) 3 ] (TDA = NH 2 (CH 2 ) 12 CH 3 ) with 2wt % of metal load. Elemental analysis (EA), FTIR, XPS, XRD and atomic absorption spectroscopy (AA) were the techniques employed for characterization. FTIR and XRD revealed that both complexes were mainly immobilized on the GO surface. The partial hydrogenation of 1-heptyne was the test reaction to evaluate the catalytic behavior of these heterogenized complexes under mild conditions of temperature and pressure in a semi continuous process. The results were compared with those obtained with the Wilkinson catalyst under the same operational conditions. AA analysis revealed that there is no leaching of the complexes during the heterogeneous catalytic evaluations. [RhCl(TDA) 3 ]/GO was the best catalyst due to electronic and steric effects as well as the influence of the support.
{"title":"Graphite oxide as a support for palladium and rhodium complexes, assessed as catalysts for the partial hydrogenation of 1-heptyne","authors":"Quiroga Me, L. da, Cagnola Ea, Á. Mastalir, T. Szabó, J. Paredes, L. MartínezBovier, C. Betti","doi":"10.15406/MSEIJ.2020.04.00136","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00136","url":null,"abstract":"Graphite oxide (GO) was used to anchor [PdCl 2 (TDA) 2 ] and [RhCl(TDA) 3 ] (TDA = NH 2 (CH 2 ) 12 CH 3 ) with 2wt % of metal load. Elemental analysis (EA), FTIR, XPS, XRD and atomic absorption spectroscopy (AA) were the techniques employed for characterization. FTIR and XRD revealed that both complexes were mainly immobilized on the GO surface. The partial hydrogenation of 1-heptyne was the test reaction to evaluate the catalytic behavior of these heterogenized complexes under mild conditions of temperature and pressure in a semi continuous process. The results were compared with those obtained with the Wilkinson catalyst under the same operational conditions. AA analysis revealed that there is no leaching of the complexes during the heterogeneous catalytic evaluations. [RhCl(TDA) 3 ]/GO was the best catalyst due to electronic and steric effects as well as the influence of the support.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83841787","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 : 2020-03-04DOI: 10.22541/au.158334209.96566671
Xiangqiao Yan
In this note, a linear mean stress model is presented on basis of the multiaxial model of fatigue life of metal materials proposed by Liu and Yan. By using the experimental data of fatigue life of metal materials reported in the literature, the model is systematically validated.
{"title":"A mean stress model of fatigue life of metal materials under multiaxial loading","authors":"Xiangqiao Yan","doi":"10.22541/au.158334209.96566671","DOIUrl":"https://doi.org/10.22541/au.158334209.96566671","url":null,"abstract":"In this note, a linear mean stress model is presented on basis of the multiaxial model of fatigue life of metal materials proposed by Liu and Yan. By using the experimental data of fatigue life of metal materials reported in the literature, the model is systematically validated.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78428166","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 : 2020-01-01DOI: 10.15406/MSEIJ.2020.04.00128
O. Olaniran
{"title":"Efficacy of surface modification by layer-by-layer loading for drug delivery","authors":"O. Olaniran","doi":"10.15406/MSEIJ.2020.04.00128","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00128","url":null,"abstract":"","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77711291","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 : 2020-01-01DOI: 10.15406/MSEIJ.2020.04.00138
Mena I. Souliman, N. R. Bastola, W. Zeiada
Pavement performance is a key parameter that governs the serviceability of road networks. This performance is heavily influenced by the pavement construction materials such as asphalt binder and aggregates. The use of proper aggregates results in enhanced structural stability and greater long-term performance of pavements. However, due to the rapid construction of roads around the world, aggregates used in the base layer are often treated with various stabilizing agents such as lime and cement. In this study, various mechanistic analyses are performed using the 3-D Move Analysis software to study their effect on rutting and fatigue resistance performance. The analysis showed that the use of stabilizing agents increased the pavement performance up to 96% for fatigue cracking and 34.4% for rutting compared to untreated base layers. The cost-effectiveness analysis also showed that the use of stabilizing agents would reduce the long-term cost of pavement as compared to untreated bases.
{"title":"Improvement of fatigue and rutting performance with different base treatments","authors":"Mena I. Souliman, N. R. Bastola, W. Zeiada","doi":"10.15406/MSEIJ.2020.04.00138","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00138","url":null,"abstract":"Pavement performance is a key parameter that governs the serviceability of road networks. This performance is heavily influenced by the pavement construction materials such as asphalt binder and aggregates. The use of proper aggregates results in enhanced structural stability and greater long-term performance of pavements. However, due to the rapid construction of roads around the world, aggregates used in the base layer are often treated with various stabilizing agents such as lime and cement. In this study, various mechanistic analyses are performed using the 3-D Move Analysis software to study their effect on rutting and fatigue resistance performance. The analysis showed that the use of stabilizing agents increased the pavement performance up to 96% for fatigue cracking and 34.4% for rutting compared to untreated base layers. The cost-effectiveness analysis also showed that the use of stabilizing agents would reduce the long-term cost of pavement as compared to untreated bases.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84227629","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 : 2020-01-01DOI: 10.15406/MSEIJ.2020.04.00125
Petelin Al, Bokstein Bs, A. Novikov, Novikov Ea
The Fischer’s model1 is the base of the standard description of the diffusion along grain boundary (GB) with leakage to grain bulk. Various versions of calculation diffusant concentration field were realized: for self diffusion and hetero diffusion, with a grain boundary segregation2,3 and formation of atomic complexes in GB,4‒6 for various temperature areas7 and various structural types of GBs.8 It may seem strange, but the model describing influence of chemical processes in GB, which bind a part of diffusing atoms, on the rate of their moving in GB wasn’t developed. Though the experimental fact of grain boundary diffusion (GBD) delay due to precipitation of nanoparticles in GB is well-known, it is usually connected with the idea that fine particles which are formed in GB reduce the section of boundary and diffusive flux. The direction of this investigation is the development the Fisher’s model of GBD taking into account simultaneous chemical interaction of diffusive and matrix atoms in GB. The events of this kind – parallel carrying out two processes with participation of the same atoms – are well-known in heterogeneous kinetics.9 As a typical example of those processes it can be considered the steel nitration process.
{"title":"Chemical compound formation and diffusion – as parallel processes in grain boundary","authors":"Petelin Al, Bokstein Bs, A. Novikov, Novikov Ea","doi":"10.15406/MSEIJ.2020.04.00125","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00125","url":null,"abstract":"The Fischer’s model1 is the base of the standard description of the diffusion along grain boundary (GB) with leakage to grain bulk. Various versions of calculation diffusant concentration field were realized: for self diffusion and hetero diffusion, with a grain boundary segregation2,3 and formation of atomic complexes in GB,4‒6 for various temperature areas7 and various structural types of GBs.8 It may seem strange, but the model describing influence of chemical processes in GB, which bind a part of diffusing atoms, on the rate of their moving in GB wasn’t developed. Though the experimental fact of grain boundary diffusion (GBD) delay due to precipitation of nanoparticles in GB is well-known, it is usually connected with the idea that fine particles which are formed in GB reduce the section of boundary and diffusive flux. The direction of this investigation is the development the Fisher’s model of GBD taking into account simultaneous chemical interaction of diffusive and matrix atoms in GB. The events of this kind – parallel carrying out two processes with participation of the same atoms – are well-known in heterogeneous kinetics.9 As a typical example of those processes it can be considered the steel nitration process.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76988815","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 : 2020-01-01DOI: 10.15406/MSEIJ.2020.04.00146
C. Moganapriya, Gobinath Vk, A. Manjusri, S. Santhosh, T. Mugilan
Composite materials are commonly used in structures that demand a high level of mechanical performance. Due to high strength and safety requirements, these applications require joining composites either to composites or to metals. Composite joints create highly localized stress concentration around the joints that cause failure in the substrates. The fracture toughness is the critical aspect that influence on the failure of the substrates. In this work, fracture toughness is determined for a center crack developed on the surface of the substrate of the composite joints. In FEM analysis, Stress intensity factor (K) and J integral are used to find out the fracture toughness value. The influence of various parameters such as fiber orientation angle, crack length, applied load and bolt hole diameter on fracture toughness is determined with the use of LEFM in finite element analysis. Stress intensity factor and J integral are validated with the theoretical data available. Geometrical parameters which affect fracture toughness are optimized by using Taguchi analysis and design of experiments. The result shows that the crack length is the most significant parameter which affects the fracture toughness substantially. Elasto plastic region (dog bone shape) near the crack tip is also analyzed in this work.
{"title":"Fracture analysis and geometrical parameter optimization of bolted composite joints","authors":"C. Moganapriya, Gobinath Vk, A. Manjusri, S. Santhosh, T. Mugilan","doi":"10.15406/MSEIJ.2020.04.00146","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00146","url":null,"abstract":"Composite materials are commonly used in structures that demand a high level of mechanical performance. Due to high strength and safety requirements, these applications require joining composites either to composites or to metals. Composite joints create highly localized stress concentration around the joints that cause failure in the substrates. The fracture toughness is the critical aspect that influence on the failure of the substrates. In this work, fracture toughness is determined for a center crack developed on the surface of the substrate of the composite joints. In FEM analysis, Stress intensity factor (K) and J integral are used to find out the fracture toughness value. The influence of various parameters such as fiber orientation angle, crack length, applied load and bolt hole diameter on fracture toughness is determined with the use of LEFM in finite element analysis. Stress intensity factor and J integral are validated with the theoretical data available. Geometrical parameters which affect fracture toughness are optimized by using Taguchi analysis and design of experiments. The result shows that the crack length is the most significant parameter which affects the fracture toughness substantially. Elasto plastic region (dog bone shape) near the crack tip is also analyzed in this work.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83006089","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 : 2020-01-01DOI: 10.15406/mseij.2020.04.00137
P. E. Atatah, Catherine W. Kisavi-Atatah
Historically speaking, crude oil was first discovered in Beaumont, Texas in the early 20th century by a farmer who was tilling his land only to see black nasty and dirty oily substance floating from his farm. He called on the public health and environmental engineering officials to take some samples of the oil for further examination. Thereafter, the milestone of oil as one of the most valuable items worldwide was born. Precisely speaking, that is why majority of the rich and possibly competitive millionaires in the USA were from the state of Texas. The millionaires’ monies were so massive that it developed a saying that “When it is big, it is only big enough for Texas; and not necessarily due to the size of the state of Texas.” Yes indeed, it was big enough for Texas. And, this was how oil was first discovered in the state of Texas and the rest of the world were forced to play the roles of runners’ ups trying to catch with this historic race.
{"title":"Petroleum engineering defaults about excessive productions of crude oil especially OPEC countries and its implications about lack of national financial sustainability","authors":"P. E. Atatah, Catherine W. Kisavi-Atatah","doi":"10.15406/mseij.2020.04.00137","DOIUrl":"https://doi.org/10.15406/mseij.2020.04.00137","url":null,"abstract":"Historically speaking, crude oil was first discovered in Beaumont, Texas in the early 20th century by a farmer who was tilling his land only to see black nasty and dirty oily substance floating from his farm. He called on the public health and environmental engineering officials to take some samples of the oil for further examination. Thereafter, the milestone of oil as one of the most valuable items worldwide was born. Precisely speaking, that is why majority of the rich and possibly competitive millionaires in the USA were from the state of Texas. The millionaires’ monies were so massive that it developed a saying that “When it is big, it is only big enough for Texas; and not necessarily due to the size of the state of Texas.” Yes indeed, it was big enough for Texas. And, this was how oil was first discovered in the state of Texas and the rest of the world were forced to play the roles of runners’ ups trying to catch with this historic race.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88574320","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 : 2020-01-01DOI: 10.15406/MSEIJ.2020.04.00132
A. Farajpour, M. R. Farajpour, A. Shahidi
Increasing the level of knowledge on the mechanics of biological structures such as protein microtubules is important because of two main reasons. The first reason is that the biological properties of living organisms are highly affected by their mechanical properties such as their elasticity modulus and resonance natural frequencies. Secondly, the mechanical properties and characteristics can be used as a clue in order to analyze the performance and functionality of a living organism. In this paper, the pioneering research studies on the vibrational behavior of protein microtubules as an important part of the cytoplasm are reviewed. Two widely used theoretical approaches, namely the pure nonlocal and nonlocal strain gradient models, are proposed. The natural frequencies of microtubules are strongly influenced by the stress nonlocality and the half wave number along the axial direction.
{"title":"Vibration of protein microtubules via scale-dependent continuum models","authors":"A. Farajpour, M. R. Farajpour, A. Shahidi","doi":"10.15406/MSEIJ.2020.04.00132","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00132","url":null,"abstract":"Increasing the level of knowledge on the mechanics of biological structures such as protein microtubules is important because of two main reasons. The first reason is that the biological properties of living organisms are highly affected by their mechanical properties such as their elasticity modulus and resonance natural frequencies. Secondly, the mechanical properties and characteristics can be used as a clue in order to analyze the performance and functionality of a living organism. In this paper, the pioneering research studies on the vibrational behavior of protein microtubules as an important part of the cytoplasm are reviewed. Two widely used theoretical approaches, namely the pure nonlocal and nonlocal strain gradient models, are proposed. The natural frequencies of microtubules are strongly influenced by the stress nonlocality and the half wave number along the axial direction.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77962580","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 : 2020-01-01DOI: 10.15406/MSEIJ.2020.04.00123
M. Elamin, J. Varga
Dynamic loading experiments under extreme testing conditions yield much different mechanical and chemical responses in materials when compared to those found under static conditions. Engineering applications of shock physics including ballistic and explosive impact, as well as any other sort of high energy collision, are found in a range of industries such as armor and weapons. The extreme temperatures and pressures at which shock physics experiments are able to test can simulate the response of radioactive materials during the detonation of nuclear weapons. It is therefore critically important to these industries to have an understand of the plastic response of materials at high temperatures and strain rates. An understanding of material responses is especially important for applications whereby shear bands are generated under extreme high strain rate conditions, such as in automotive and aerospace structures.1‒4 The foregoing serves as the motivation to investigate the appropriate experimental techniques that test the material responses to these conditions. One of the most common methods of investigating the behavior of materials subjected to a continuous deformation at high strain rates on the order of 105107s-1 is to perform shear plate impact experiments.5‒7 In a general plate impact experiment, a gas gun launches a plate projectile towards a thin, circular specimen sandwiched between two additional plates.8 The flyer plate lies in between the projectile and the specimen, while the anvil plate lies behind the specimen. Often, the flyer plate itself is used as the projectile, making direct contact with the specimen. The projectile is guided by a key running through a keyway within the gas gun barrel, keeping it from rotating. A typical schematic of an experiment is depicted in Figure 1.
{"title":"Plate impact method for shock physics testing","authors":"M. Elamin, J. Varga","doi":"10.15406/MSEIJ.2020.04.00123","DOIUrl":"https://doi.org/10.15406/MSEIJ.2020.04.00123","url":null,"abstract":"Dynamic loading experiments under extreme testing conditions yield much different mechanical and chemical responses in materials when compared to those found under static conditions. Engineering applications of shock physics including ballistic and explosive impact, as well as any other sort of high energy collision, are found in a range of industries such as armor and weapons. The extreme temperatures and pressures at which shock physics experiments are able to test can simulate the response of radioactive materials during the detonation of nuclear weapons. It is therefore critically important to these industries to have an understand of the plastic response of materials at high temperatures and strain rates. An understanding of material responses is especially important for applications whereby shear bands are generated under extreme high strain rate conditions, such as in automotive and aerospace structures.1‒4 The foregoing serves as the motivation to investigate the appropriate experimental techniques that test the material responses to these conditions. One of the most common methods of investigating the behavior of materials subjected to a continuous deformation at high strain rates on the order of 105107s-1 is to perform shear plate impact experiments.5‒7 In a general plate impact experiment, a gas gun launches a plate projectile towards a thin, circular specimen sandwiched between two additional plates.8 The flyer plate lies in between the projectile and the specimen, while the anvil plate lies behind the specimen. Often, the flyer plate itself is used as the projectile, making direct contact with the specimen. The projectile is guided by a key running through a keyway within the gas gun barrel, keeping it from rotating. A typical schematic of an experiment is depicted in Figure 1.","PeriodicalId":18241,"journal":{"name":"Material Science & Engineering International Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81020793","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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