Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10890d
M. Shahat, A. Ghitas, F. El-Hossary, A. El-Rahman, M. Fawey
In this work, the nanotechnology procedure was utilized to improve both the adhesion force and surface properties of graphene oxide (GO) films. GO has been obtained in a powder form by oxidation purified graphite using the modified Hummer’s technique. Different films of GO nanoparticles (NPs) were deposited using several types of solvents distilled water, acetone, ethanol, dimethylformamide (DMF) or ethylene glycol. The examination of structural and optical properties of GO films was studied by XRD and UV–vis absorption spectroscopy. Moreover, electrical properties, surface roughness, contact angle, adhesion force, wetting energy and spreading coefficient were investigated. It was observed that the properties of the prepared films are influenced by the solvent type. The electrical resistivity of films is highly dependent on the solvent type which exhibited the lowest value with distilled water. Furthermore, GO film synthesized with distilled water has the best values of adhesion force and average surface roughness (Ra) 143.4 mN/m and ~ 7.83 µm, respectively. These results are mostly attributed to hydrophilic cites and GO NPs agglomeration in the surface of films and the effects of their size leading to an expansion in the surface roughness.
{"title":"Study on Enhancement of Adhesion Force and Surface Conductivity of Graphene Oxide Films using Different Solvents","authors":"M. Shahat, A. Ghitas, F. El-Hossary, A. El-Rahman, M. Fawey","doi":"10.9734/bpi/rtcams/v1/10890d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10890d","url":null,"abstract":"In this work, the nanotechnology procedure was utilized to improve both the adhesion force and surface properties of graphene oxide (GO) films. GO has been obtained in a powder form by oxidation purified graphite using the modified Hummer’s technique. Different films of GO nanoparticles (NPs) were deposited using several types of solvents distilled water, acetone, ethanol, dimethylformamide (DMF) or ethylene glycol. The examination of structural and optical properties of GO films was studied by XRD and UV–vis absorption spectroscopy. Moreover, electrical properties, surface roughness, contact angle, adhesion force, wetting energy and spreading coefficient were investigated. It was observed that the properties of the prepared films are influenced by the solvent type. The electrical resistivity of films is highly dependent on the solvent type which exhibited the lowest value with distilled water. Furthermore, GO film synthesized with distilled water has the best values of adhesion force and average surface roughness (Ra) 143.4 mN/m and ~ 7.83 µm, respectively. These results are mostly attributed to hydrophilic cites and GO NPs agglomeration in the surface of films and the effects of their size leading to an expansion in the surface roughness.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76029840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/3077f
K. Priya, J. Moses
Modal was first introduced by Lenzing AG Company of Austria who trade named the fabrics identity. Modal is very soft, shiny in nature and silk feel than mercerized cotton with the ability to absorb up to 50% more water than cotton. Fabric made from modal drape well and do not pile like cotton. In this study, modal fabrics (woven and knitted) are selected and conventionally pretreated and subjected with 98% formic acid in different concentrations. The formic acid treated modal fabrics were then undergone for different testings. These treatments on modal fabrics were correspondingly compared with those of cotton for its effectiveness. Also compared with the no formic acid treated modal fabric and cotton fabric respectively.
{"title":"An Investigation of Modal Fibre Based on Absorption Characteristics","authors":"K. Priya, J. Moses","doi":"10.9734/bpi/rtcams/v1/3077f","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/3077f","url":null,"abstract":"Modal was first introduced by Lenzing AG Company of Austria who trade named the fabrics identity. Modal is very soft, shiny in nature and silk feel than mercerized cotton with the ability to absorb up to 50% more water than cotton. Fabric made from modal drape well and do not pile like cotton. In this study, modal fabrics (woven and knitted) are selected and conventionally pretreated and subjected with 98% formic acid in different concentrations. The formic acid treated modal fabrics were then undergone for different testings. These treatments on modal fabrics were correspondingly compared with those of cotton for its effectiveness. Also compared with the no formic acid treated modal fabric and cotton fabric respectively.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78933234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/11210d
Mahipal Singh, Madan Singh
The volume thermal expansion of nanomaterials under the influence of temperature has been studied using a new integral form of equation of state (IFEOS). A wide variety of nanomaterials such as fullerene (C60), 20 nm-Ni, 15 nm-(80Ni+20Fe), n-ZnO, n-TiO2 and n-NiO has been considered to analyse the influence of temperature on them. The acquired results were compared to existing experimental data as well as other theoretical approaches. The validity of the newly established integral form of equation of state (IFEOS) for nanomaterials is supported by excellent agreement between theory and current experimental data.
{"title":"Study of Temperature Dependence of Volume Thermal Expansion of Nanomaterials Using New Integral Form of Equation of State (IFEOS)","authors":"Mahipal Singh, Madan Singh","doi":"10.9734/bpi/rtcams/v1/11210d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/11210d","url":null,"abstract":"The volume thermal expansion of nanomaterials under the influence of temperature has been studied using a new integral form of equation of state (IFEOS). A wide variety of nanomaterials such as fullerene (C60), 20 nm-Ni, 15 nm-(80Ni+20Fe), n-ZnO, n-TiO2 and n-NiO has been considered to analyse the influence of temperature on them. The acquired results were compared to existing experimental data as well as other theoretical approaches. The validity of the newly established integral form of equation of state (IFEOS) for nanomaterials is supported by excellent agreement between theory and current experimental data.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87691045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10911d
A. Allahi, M. Fathi, E. Mohajerani
{"title":"Single Excited Molecular Orbitals’ Contribution in Uv-Vis Absorption of Dichloride-bis(5,7- dichloroquinolin-8-olato)tin(IV): A Recent Study","authors":"A. Allahi, M. Fathi, E. Mohajerani","doi":"10.9734/bpi/rtcams/v1/10911d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10911d","url":null,"abstract":"","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88416400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/2857f
Rezza Ruzuqi
{"title":"Analysing the Impact Strength of Polymer Composite Materials (PCM) Fiber Reinforced in the Fiberboat Application","authors":"Rezza Ruzuqi","doi":"10.9734/bpi/rtcams/v1/2857f","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/2857f","url":null,"abstract":"","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80061143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10980d
N. Venugopal, B. Sumalatha, S. Bonthula
Highly sensitive spectrophotometric and gas chromatographic methods were developed for the determination of chloropyrifos. Alkaline hydrolysis of chloropyrifos to 1,2,4-trichloropyridine was the basis followed by coupling with congored in presence of nitric acid. The absorption maxima of blue color formed at 800-900C was formed at 605nm.Beer’s law was obeyed in the range of 0.5-5.7 ppm. The standard deviation was found to be ± 0.005.The method was free from other pesticide interferences. The method was applied to various fruits and vegetables procured at various agricultural fields at sabbavaram area, Visakhapatnam, India and found satisfactory. Keeping in view of extensive use of pesticides on fruits and vegetables damaging the ecological balance. Determination of pesticide residue in The various vegetables collected are cauliflower, potato, spinach, and fruits suchas pinkapple, grapes etc were analysed by using Gas –chromatography with electron capture detector (GC-ECD). GC-ECD has great potential for determining organochlorine pesticides in food extracts at low levels. Residues were extracted with hexane, dichloromethane and ethyl acetate (1:1% V/V).Clean up procedure was carried by applying solid phase extraction column. The recoveries of chloropyrifos pesticide in fruits and vegetables selected were in the range of 80 to 98% fortified at 0.5 mg/Kg. Some grape samples showed above the limit of quantification.
{"title":"Analytical Techniques for Determining Chloropyrifos in Fruits and Vegetables","authors":"N. Venugopal, B. Sumalatha, S. Bonthula","doi":"10.9734/bpi/rtcams/v1/10980d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10980d","url":null,"abstract":"Highly sensitive spectrophotometric and gas chromatographic methods were developed for the determination of chloropyrifos. Alkaline hydrolysis of chloropyrifos to 1,2,4-trichloropyridine was the basis followed by coupling with congored in presence of nitric acid. The absorption maxima of blue color formed at 800-900C was formed at 605nm.Beer’s law was obeyed in the range of 0.5-5.7 ppm. The standard deviation was found to be ± 0.005.The method was free from other pesticide interferences. The method was applied to various fruits and vegetables procured at various agricultural fields at sabbavaram area, Visakhapatnam, India and found satisfactory. Keeping in view of extensive use of pesticides on fruits and vegetables damaging the ecological balance. Determination of pesticide residue in The various vegetables collected are cauliflower, potato, spinach, and fruits suchas pinkapple, grapes etc were analysed by using Gas –chromatography with electron capture detector (GC-ECD). GC-ECD has great potential for determining organochlorine pesticides in food extracts at low levels. Residues were extracted with hexane, dichloromethane and ethyl acetate (1:1% V/V).Clean up procedure was carried by applying solid phase extraction column. The recoveries of chloropyrifos pesticide in fruits and vegetables selected were in the range of 80 to 98% fortified at 0.5 mg/Kg. Some grape samples showed above the limit of quantification.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82418359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10583d
P. Pitayachaval, P. Watcharamaisakul
Based on innovation and competitive market for food industry, there are several food products which have been designed to attract customer. Since there is USD 39,431 millions of chocolate sales in 2018, USA [1], chocolate product shapes have been developed based on manufacturing process.This paper presents a review process of a machine design of chocolate extrusion based co-rotating twin screw extruder. A property of suitable chocolate for extruder was established. The pros and cons of machine extruder for food processing including, a screw extruder design were exposed. Since there were problems in the chocolate extruder, the process parameters such as barrel temperatures, feed rate, screw speed, motor load and melt pressure were established. These parameters would be applied to design screw extruder for chocolate processing.
{"title":"Study on a Machine Design of Chocolate Extrusion Based Co-rotating Twin Screw Extruder: A Review","authors":"P. Pitayachaval, P. Watcharamaisakul","doi":"10.9734/bpi/rtcams/v1/10583d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10583d","url":null,"abstract":"Based on innovation and competitive market for food industry, there are several food products which have been designed to attract customer. Since there is USD 39,431 millions of chocolate sales in 2018, USA [1], chocolate product shapes have been developed based on manufacturing process.This paper presents a review process of a machine design of chocolate extrusion based co-rotating twin screw extruder. A property of suitable chocolate for extruder was established. The pros and cons of machine extruder for food processing including, a screw extruder design were exposed. Since there were problems in the chocolate extruder, the process parameters such as barrel temperatures, feed rate, screw speed, motor load and melt pressure were established. These parameters would be applied to design screw extruder for chocolate processing.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82724444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10292d
M. Shahid, A. Jadoon, Qanita Tayyaba, H. Farooq
Duplex stainless steels (DSS) exhibit attractive combination of austenitic and ferritic properties and have been extensively used in various industries such as petrochemical, pulp and paper etc. They demonstrate better corrosion resistance, especially chloride stress corrosion and chloride pitting corrosion, and exhibit higher strength than standard austenitic stainless steels. For these reasons, they are excellent candidate for offshore oil and gas industry. In the present study, stress corrosion behaviour of duplex stainless steel in 3.5% sodium chloride solution, has been investigated by weight loss measurements, electrochemical corrosion testing and slow strain rate test (SSRT). Weight loss data showed no significant corrosion after 1700 hours. Electrochemical polarization test in 3.5% NaCl solution exhibited a uniform corrosion rate of 0.008 mpy showing passivity in the range of 735–950 mV Vs SSC. A comparison of the slow strain rate test for duplex stainless steel in 3.5% NaCl solution also showed a similar stress-strain behaviour. In contrast, the stress-strain behaviour of mild steel showed a loss of about 25% elongation. The excellent corrosion and especially the pitting resistance was considered to be responsible for maintaining good ductility in DSS.
双相不锈钢(DSS)具有奥氏体和铁素体相结合的优异性能，广泛应用于石油化工、纸浆、造纸等行业。它们具有更好的耐蚀性，特别是氯化物应力腐蚀和氯化物点蚀，并表现出比标准奥氏体不锈钢更高的强度。由于这些原因，它们是海上油气行业的优秀候选者。采用失重法、电化学腐蚀试验和慢应变速率试验(SSRT)研究了双相不锈钢在3.5%氯化钠溶液中的应力腐蚀行为。1700小时后失重数据显示无明显腐蚀。在3.5% NaCl溶液中进行电化学极化试验，腐蚀速率为0.008 mpy，钝化范围为735 ~ 950 mV Vs SSC。双相不锈钢在3.5% NaCl溶液中的慢应变速率试验也显示出相似的应力-应变行为。相比之下，低碳钢的应力-应变行为表现出约25%的伸长率损失。优良的耐蚀性，特别是抗点蚀性被认为是DSS保持良好延展性的原因。
{"title":"Stress Corrosion Cracking of Lean Duplex Steel in 3.5% Sodium Chloride Solution","authors":"M. Shahid, A. Jadoon, Qanita Tayyaba, H. Farooq","doi":"10.9734/bpi/rtcams/v1/10292d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10292d","url":null,"abstract":"Duplex stainless steels (DSS) exhibit attractive combination of austenitic and ferritic properties and have been extensively used in various industries such as petrochemical, pulp and paper etc. They demonstrate better corrosion resistance, especially chloride stress corrosion and chloride pitting corrosion, and exhibit higher strength than standard austenitic stainless steels. For these reasons, they are excellent candidate for offshore oil and gas industry. In the present study, stress corrosion behaviour of duplex stainless steel in 3.5% sodium chloride solution, has been investigated by weight loss measurements, electrochemical corrosion testing and slow strain rate test (SSRT). Weight loss data showed no significant corrosion after 1700 hours. Electrochemical polarization test in 3.5% NaCl solution exhibited a uniform corrosion rate of 0.008 mpy showing passivity in the range of 735–950 mV Vs SSC. A comparison of the slow strain rate test for duplex stainless steel in 3.5% NaCl solution also showed a similar stress-strain behaviour. In contrast, the stress-strain behaviour of mild steel showed a loss of about 25% elongation. The excellent corrosion and especially the pitting resistance was considered to be responsible for maintaining good ductility in DSS.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77348634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10644d
I. R. Alexei
Two main points of the objectives to design software systems (SS) have been considered: achieving proper functioning of the SS with consistent results, and the possibility to obtain reliable assessments of the Software System quality depending on the initial requirements. A cognitive-contextual design strategy has been proposed that can significantly improve the perception of actual elements of the design task by creating a context with selected formalized conditions, and enhance cognitive coherence of the project elements throughout the Software System lifecycle.
{"title":"The Environment of Cognitive-Contextual Software Design: A Study Concept to Implementation","authors":"I. R. Alexei","doi":"10.9734/bpi/rtcams/v1/10644d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10644d","url":null,"abstract":"Two main points of the objectives to design software systems (SS) have been considered: achieving proper functioning of the SS with consistent results, and the possibility to obtain reliable assessments of the Software System quality depending on the initial requirements. A cognitive-contextual design strategy has been proposed that can significantly improve the perception of actual elements of the design task by creating a context with selected formalized conditions, and enhance cognitive coherence of the project elements throughout the Software System lifecycle.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83193681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.9734/bpi/rtcams/v1/10681d
Sahala Siallagan, R. Silaban, A. Ali
The aim of this paper is to review the literatures on technological innovation of industries in relating to the growth of the economy in past decade. The data and ideas on this paper come primarily from review articles relating to the economic development of the nations. The level of success in innovation in the various technology differs among countries because of the different national background and cultures. Innovation technology has always played a critical role for the long-term survival of organizations. This paper serves as a description to the researchers in predicting for the next future study to improve the better quality and standard of living. Innovation also plays an important role in constructing the economy, in expanding and sustaining the high performance of companies, in improving the standard of living and in creating a better quality of life.
{"title":"Literatures Pertaining to the Definitions of Technological Innovation Capabilities in the New Millennium: A Review","authors":"Sahala Siallagan, R. Silaban, A. Ali","doi":"10.9734/bpi/rtcams/v1/10681d","DOIUrl":"https://doi.org/10.9734/bpi/rtcams/v1/10681d","url":null,"abstract":"The aim of this paper is to review the literatures on technological innovation of industries in relating to the growth of the economy in past decade. The data and ideas on this paper come primarily from review articles relating to the economic development of the nations. The level of success in innovation in the various technology differs among countries because of the different national background and cultures. Innovation technology has always played a critical role for the long-term survival of organizations. This paper serves as a description to the researchers in predicting for the next future study to improve the better quality and standard of living. Innovation also plays an important role in constructing the economy, in expanding and sustaining the high performance of companies, in improving the standard of living and in creating a better quality of life.","PeriodicalId":21032,"journal":{"name":"Recent Trends in Chemical and Material Sciences Vol. 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79644350","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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