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Al-Azhar Bulletin of Science最新文献

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PREPARATION AND ELECTROCHEMICAL BEHAVIOR OF THE ACTIVATED CARBON FROM POMEGRANATE PEELS AS ENERGY-STORAGE MATERIALS 石榴皮储能材料活性炭的制备及电化学性能研究
Al-Azhar Bulletin of Science Pub Date : 2020-06-01 DOI: 10.21608/absb.2020.111459
M. Morad, S. Attia, S. Mohamed, M. Moharam, R. Abou-shahba, M. Rashad
{"title":"PREPARATION AND ELECTROCHEMICAL BEHAVIOR OF THE ACTIVATED CARBON FROM POMEGRANATE PEELS AS ENERGY-STORAGE MATERIALS","authors":"M. Morad, S. Attia, S. Mohamed, M. Moharam, R. Abou-shahba, M. Rashad","doi":"10.21608/absb.2020.111459","DOIUrl":"https://doi.org/10.21608/absb.2020.111459","url":null,"abstract":"This study investigates the electrochemical evaluation of the activated carbon (AC) prepared from pomegranate peels which were collected, dried, carbonized and finally activated with KOH at different temperatures. The characterization of the as-prepared AC revealed an amorphous type of carbon and densely layer-stacking sheets with an interconnected micro porous network with a remarkable 3128.86m2g-1 surface area. The as-synthesized AC displayed a remarkable capacitance of 126 F g-1 at 0.5 A g-1with a storage retention of 137 % after 2000 cycles at a current density of 2 A g-1.  Meanwhile, the realistic symmetrical simulation has been installed, it shows an energy density of 4.58 W h kg-1 at a power density of 244 W kg-1 with a storage retention of 66 % of the initial capacity at a current density of 2 A g-1 after 2000 cycles. Overall, these results demonstrate that for supercapacitors evaluation, the AC electrode can be considered a successful electrode material.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90041151","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}
引用次数: 0
PREPARATION OF ACTIVATED CARBON FROM ION EXCHANGE RESIN WASTE AND ITS APPLICATION FOR MANGANESE REMOVAL FROM GROUNDWATER 离子交换树脂废渣制备活性炭及其在地下水除锰中的应用
Al-Azhar Bulletin of Science Pub Date : 2020-06-01 DOI: 10.21608/absb.2020.111469
A. Swelam, Y. Gedamy, A. El.shahed
{"title":"PREPARATION OF ACTIVATED CARBON FROM ION EXCHANGE RESIN WASTE AND ITS APPLICATION FOR MANGANESE REMOVAL FROM GROUNDWATER","authors":"A. Swelam, Y. Gedamy, A. El.shahed","doi":"10.21608/absb.2020.111469","DOIUrl":"https://doi.org/10.21608/absb.2020.111469","url":null,"abstract":"The present study aims to synthesize an activated carbon adsorbent (S-AC, P-AC and OH-AC) from polystyrene divinyl benzene waste under different carbonization temperature (450oC and 900 oC and activation conditions (H2SO4, H3PO4 or NaOH). It being characterized and applied as an adsorbent for manganese removal from groundwater. FTIR results indicate that the changes in the peak intensities clear that the binding process was occurring on the surface of the adsorbent. Different factors such as solution pH, adsorbent dosage, contact time, temperature and Mn(II) initial concentration were investigated. The results showed that manganese adsorption capacity decreases with the increase of the carbonization temperature (900oC) and of activating agent H2SO4 > H3PO4 >NaOH. Kinetically, it was shown that the activation temperature of 450oC is the best temperature for activating the adsorbent carbons. The pseudo-first-order model is appropriate for predicting the adsorption process of Mn(II) onto the P-AC 450oC, P-AC 900oC and OH-AC 900oC, while the pseudo-second-order model is appropriate for predicting the adsorption process of Mn(II) onto the both S-AC 450oC, S-AC 900oC, OH-AC 450oCand OH-AC 900oC. Thermodynamic calculations affirmed that Mn(II) adsorption onto S-AC and P-AC was an endothermic process while onto OH-AC was exothermic process. Finally, the results suggested that the prepared S-AC has high adsorption capacities for Mn(II) compared with other adsorbents, such as P-AC and OH-AC. Therefore, S-AC 450oCcan be used in the groundwater treatment unit.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82469416","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}
引用次数: 0
RADIATION EFFECT ON MAGNETOHYDRODYNAMIC CARREAU NANOFLUID FLOW PAST NON-LINEAR PERMEABLE HEATED STRETCHING SHEET WITH PARTIAL SLIP 磁纳米流体通过部分滑移的非线性可渗透加热拉伸片的辐射效应
Al-Azhar Bulletin of Science Pub Date : 2020-06-01 DOI: 10.21608/absb.2020.111480
H. Shawky, N. Eldabe, K. Kamel, Esmat A. Abd-Aziz
{"title":"RADIATION EFFECT ON MAGNETOHYDRODYNAMIC CARREAU NANOFLUID FLOW PAST NON-LINEAR PERMEABLE HEATED STRETCHING SHEET WITH PARTIAL SLIP","authors":"H. Shawky, N. Eldabe, K. Kamel, Esmat A. Abd-Aziz","doi":"10.21608/absb.2020.111480","DOIUrl":"https://doi.org/10.21608/absb.2020.111480","url":null,"abstract":"The motion of a Carreau nanofluid past an infinite vertical non-linear permeable stretching sheet embedded in a non-Darcy porous medium is investigated. It is stressed by a uniform external magnetic field. The thermal radiation and heat generation are taken in consideration as well as Brownian motion with thermophoresis, chemical reaction and partial slip velocity at the boundary layer. The nonlinear partial differential equations describing the motion with heat and mass transfer are transformed to non-linear ordinary differential equations and solved by using Runge-Kutta method with approbriate boundary conditions. The effects of the physical parameters of the problem on the obtained solutions are discussed numerically and graphically. Through the section of discussion the skin friction and the rate of heat and mass transfer are computed. It is found that these physical parameters play an important rules to control the obtained velocity, temperature and concentration of the fluid.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86568612","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}
引用次数: 0
PLASMA POWER IMPACT ON ELECTROCHEMICAL PERFORMANCE OF LOW CARBON STEEL COATED BY PLASMA THIN TEOS FILMS 等离子体功率对等离子体teos薄膜涂层低碳钢电化学性能的影响
Al-Azhar Bulletin of Science Pub Date : 2020-06-01 DOI: 10.21608/absb.2020.111474
Amr Gangan, M. ElSabbagh, M. Bedair, M. El-Sabbah, A. Fahmy
{"title":"PLASMA POWER IMPACT ON ELECTROCHEMICAL PERFORMANCE OF LOW CARBON STEEL COATED BY PLASMA THIN TEOS FILMS","authors":"Amr Gangan, M. ElSabbagh, M. Bedair, M. El-Sabbah, A. Fahmy","doi":"10.21608/absb.2020.111474","DOIUrl":"https://doi.org/10.21608/absb.2020.111474","url":null,"abstract":"Electrochemical properties of thin silicon oxy carbide films were investigated as anticorrosive coatings. The film was deposited on low carbon steel substrate by radio frequency capacitive coupled plasma technique using tetraethyl ortho silicate (TEOS) as a precursor and Ar was used as a carrier gas in dependence on the applied power. The chemical composition and morphological of the deposited films were examined by energy-dispersive X-ray spectroscopy (EDX) coupled with scanning electron microscopy (SEM). The SEM results confirm a pinhole-free layer of oxy carbide was formed on the steel surface after plasma treatment. The corrosion resistance of the coatings was analyzed by potentiodynamic polarization and electrochemical spectroscopy (EIS) in 3.5% NaCl solution at room temperature. The electrochemical results show remarkable corrosion resistance enhancement after plasma treatments. The corrosion current (icorr) is significantly reduced from 12 µA/cm2 for the blank sample to 1 and 0.3 µA/cm2 for treated samples at 50, and 100 W, respectively. A marked increase of the protective properties was detected by 100 W sample with protective efficiency more than 98 % at room temperature.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85284435","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}
引用次数: 9
CONTRIBUTION TO SOURCE ROCK EVALUATION OF THE BAHARIYA FORMATION IN SURFACE AND SUBSURFACE SECTIONS, NORTH WESTERN DESERT, EGYPT 埃及西北沙漠巴哈里亚组地表和地下剖面烃源岩评价贡献
Al-Azhar Bulletin of Science Pub Date : 2019-06-20 DOI: 10.21608/absb.2019.80483
G. Attiaa, A. Abdou, S. Amir, D. Mousa
{"title":"CONTRIBUTION TO SOURCE ROCK EVALUATION OF THE BAHARIYA FORMATION IN SURFACE AND SUBSURFACE SECTIONS, NORTH WESTERN DESERT, EGYPT","authors":"G. Attiaa, A. Abdou, S. Amir, D. Mousa","doi":"10.21608/absb.2019.80483","DOIUrl":"https://doi.org/10.21608/absb.2019.80483","url":null,"abstract":"The present work deals with the identification of the generating capacity of oil generation and the hydrocarbon potentiality of the Bahariya Formation in Gebel El-Dist section and the Salam-1X well. This is depending on the organic geochemical analyses by using LECO SC632 and Rock Eval-6 pyrolysis techniques. The analysis shows that the studied samples of Gebel El-Dist are poor to fair organic richness, with poor hydrocarbon potentiality. The maturity evaluation using Tmax showed that the studied samples have immature thermal maturation not reaching the stage of oil and gas generation. Also, the analyses revealed that the studied kerogen is type III kerogen originated mainly from terrestrial plant debris and aquatic organic matter. The expected generated HC is mainly gas. The studied Salam-1X samples are poor to good organic richness, with poor to good source potiental. The studied samples are marginally mature to mature thermal maturation reaching the stage oil generation. The kerogen type is a mixture of type III/II kerogen derived mainly from mixed organic sources.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83571281","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}
引用次数: 0
MOLECULAR PHYLOGENETIC RELATIONS OF MAMMALS OF THE GENUS CANIS IN EGYPT 埃及犬属哺乳动物的分子系统发育关系
Al-Azhar Bulletin of Science Pub Date : 2019-06-09 DOI: 10.21608/absb.2019.67883
Fouad Abdel Hamid, M. Sarhan, M. Younes, M. Saleh
{"title":"MOLECULAR PHYLOGENETIC RELATIONS OF MAMMALS OF THE GENUS CANIS IN EGYPT","authors":"Fouad Abdel Hamid, M. Sarhan, M. Younes, M. Saleh","doi":"10.21608/absb.2019.67883","DOIUrl":"https://doi.org/10.21608/absb.2019.67883","url":null,"abstract":"The taxonomic identity of canids of the genus Canis in North Africa has been investigated using molecular phylogenetic analysis based on Cytochrome b mitochondrial DNA sequence analysis. Tissue samples from 18 Canis specimens collected from all known populations/taxa in Egypt were obtained and analyzed. The resulting Cyt b mt DNA sequences of current Canis taxa, described based morphological characters were compared to each other and to other Canis populations/taxa across North Africa and the Middle East. The results showed no detectable sequence differentiation among all populations, suggesting that the separation of the phenotypically differentiated populations of Egypt has been relatively recent. Estimate divergence time between different phylogroups of the genus and the phylogeographic history of the genus was discussed in a regional paleogeographic context.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90392097","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}
引用次数: 0
NATURAL RADIOACTIVITY ASSESSMENT AND THE ASSOCIATED RADIOLOGICAL HAZARDS FOR BEACH SAND, BALTIM AREA, EGYPT. 埃及巴提姆地区沙滩的天然放射性评估及相关的放射性危害。
Al-Azhar Bulletin of Science Pub Date : 2019-06-03 DOI: 10.21608/absb.2019.67879
H. Shousha, M. Atta, A. Bakhit, H. Diab, A. A. E. Hagg, Samah Dahy
{"title":"NATURAL RADIOACTIVITY ASSESSMENT AND THE ASSOCIATED RADIOLOGICAL HAZARDS FOR BEACH SAND, BALTIM AREA, EGYPT.","authors":"H. Shousha, M. Atta, A. Bakhit, H. Diab, A. A. E. Hagg, Samah Dahy","doi":"10.21608/absb.2019.67879","DOIUrl":"https://doi.org/10.21608/absb.2019.67879","url":null,"abstract":"Natural radioactivity of 238U, 232Th series and 40K of black sand samples collected along El-Fanar and El-Nargess Beaches in Baltim area, north of the Nile Delta in Kafr El-Sheikh Governorate, were measured using a gamma-ray spectrometer with a high purity germanium (HPGe) detector. Results showed that the average activity concentrations of 238U and 232Th in El-Fanar Beach was significantly higher (73.22±5.1 and 70.8 ± 4.9 Bq kg-1) than El-Nargess Beach (31.91±2.2 and 25.95 ±1.8 Bq kg-1) respectively. The average activity concentrations of 40K in El-Fanar Beach was lower (67.47±4.7 Bq kg-1) than that in El-Nargess Beach (80.75±5.6 Bq kg-1). The hazard indices due to these radionuclides have been calculated. The obtained results from this study indicate that the average activity concentrations of 238U, 232Th and40K at El-Nargess Beach are within world median ranges while average activities of 238U and232Th in El-Fanar Beach are higher than the world mean (33and45) Bq kg-1 respectively. This study aimed to establish a baseline map of radioactivity background levels in the aforementioned region to assess any change in the radiological background levels due to any artificial effects attributed to any radiation activities.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83451384","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}
引用次数: 2
CHARACTERIZATION OF 241AM-BE NEUTRON SOURCE USING THRESHOLD FOIL ACTIVATION TECHNIQUE 用阈值箔活化技术表征241am-be中子源
Al-Azhar Bulletin of Science Pub Date : 2019-06-01 DOI: 10.21608/absb.2019.67880
N. Kotb, M. Tohamy, A. Solieman, T. E. Zakla, T. Z. Amer, S. Elmeniawi, M. Comsan
{"title":"CHARACTERIZATION OF 241AM-BE NEUTRON SOURCE USING THRESHOLD FOIL ACTIVATION TECHNIQUE","authors":"N. Kotb, M. Tohamy, A. Solieman, T. E. Zakla, T. Z. Amer, S. Elmeniawi, M. Comsan","doi":"10.21608/absb.2019.67880","DOIUrl":"https://doi.org/10.21608/absb.2019.67880","url":null,"abstract":"The aim of the study is to characterize 241Am-Be isotopic neutron source with 5 Ci activity and nominal neutron yield 1.1×107 n/s. The emitted neutrons were measured employing threshold multi-foil activation technique using the following reactions: 115In(n,n'), 58Ni(n,p), 64Zn(n,p), 27Al(n,p), 56Fe(n,p), 59Co(n,α), 24Mg(n,p), and27Al(n,α). The threshold reactions were selected based on their half-lives, adequate threshold energy and cross-section. The reaction rate of each sample foil is measured by detecting the gamma ray spectra produced as a result of reaction products decay. A hyper pure germanium detector (HPGe) is used for gamma-ray spectrum measurements. The obtained spectra were analyzed using Genie2000 software and the associated system absolute efficiency was calculated using Efftran software. Obtained reaction rates were compared with available published data.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74539882","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}
引用次数: 2
PERTURBED GROUND TRACK UNDER THE INFLUENCE OF J2 AND LUNISOLAR FORCES j2和日月力影响下的扰动地面轨迹
Al-Azhar Bulletin of Science Pub Date : 2019-06-01 DOI: 10.21608/absb.2019.66072
M. E. Awad, I. A. Hassan, H. Dewdar, A. Saad
{"title":"PERTURBED GROUND TRACK UNDER THE INFLUENCE OF J2 AND LUNISOLAR FORCES","authors":"M. E. Awad, I. A. Hassan, H. Dewdar, A. Saad","doi":"10.21608/absb.2019.66072","DOIUrl":"https://doi.org/10.21608/absb.2019.66072","url":null,"abstract":"A several types of forces are acting on the satellite. These forces are classified into conservative and nonconservativeforce. The main concern in the present research work is to studding the effect of conservative forces on the satellite orbital motion and represent this effect on satellite ground track. Where the ground tracks are the locus of points formed by the points on the Earth directly below a satellite as it travels in orbit. A mathematical model and a program code is designed using Matlab package to calculate the perturbed ground track under J2 and luni-solar forces. Whereas the J2 and Luni-Solar are a conservative forces, the secular variation is presented only in RAAN and  . Otherwise the remaining orbital element is varies periodically. The perturbed ground track is calculated under the effect of J2 and luni-solar forces. The perturbed position vectors for a satellite are converted to its corresponding latitudes and longitudes. The satellite’s position in one revolution is displayed to represent where the satellite at the time desired.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75311280","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}
引用次数: 0
IMPACT OF NANOSIZED SILICA ON THE PHYSICO-MECHANICAL PROPERTIES AND CORROSION PROTECTION OF CONCRETE 纳米二氧化硅对混凝土物理力学性能及防腐性能的影响
Al-Azhar Bulletin of Science Pub Date : 2019-06-01 DOI: 10.21608/absb.2019.67893
E. M. Elnaggar, T. Elsokkary, Mostafa A. Shohide, Basil A. El Sabbagh
{"title":"IMPACT OF NANOSIZED SILICA ON THE PHYSICO-MECHANICAL PROPERTIES AND CORROSION PROTECTION OF CONCRETE","authors":"E. M. Elnaggar, T. Elsokkary, Mostafa A. Shohide, Basil A. El Sabbagh","doi":"10.21608/absb.2019.67893","DOIUrl":"https://doi.org/10.21608/absb.2019.67893","url":null,"abstract":"Nanomaterials have an important role for enhancingthe concrete properties and inhibition of rebar corrosion in reinforced concrete. Nanosilica (NS) is one of the most effective cementitious materials, which possess high pozzolanic nature. In this work, NS was added in mix design of concrete with different ratios as; 0, 0.5, 1, 1.5, 2and 2.5 % by weight of Portland cement. Physical, mechanical properties (workability, density) were determinedfor the fresh concrete samples. While, compressive strength andmicrostructural properties of the interfacial transition zone (ITZ) between cement pastes and aggregates of concrete were investigatedfor the hardened samples.As well as electrochemical measurements (open circuit potential and linear polarization) were done for the reinforced concrete samples. The results show that, concretes containing NS up to 2% have a higher compressive strength and a denser in interfacial transition zone (ITZ). Also, corrosion inhibition for reinforced concrete increased gradually by increasing NS addition up to 2%.","PeriodicalId":7687,"journal":{"name":"Al-Azhar Bulletin of Science","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81656614","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}
引用次数: 0
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