Bulletin of Chemical Reaction Engineering and Catalysis最新文献_第8页

DFT Study on the Reaction Mechanism of Cyclization of 2-Hydroxy Chalcone Catalyzed by Bronsted Acid with M06-2X Functional Bronsted酸催化2-羟基查尔酮与M06-2X官能团环化反应机理的DFT研究

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-08-22 DOI: 10.9767/bcrec.16.4.11487.796-803

S. Hildayani, M. Martoprawiro, Y. M. Syah

{"title":"DFT Study on the Reaction Mechanism of Cyclization of 2-Hydroxy Chalcone Catalyzed by Bronsted Acid with M06-2X Functional","authors":"S. Hildayani, M. Martoprawiro, Y. M. Syah","doi":"10.9767/bcrec.16.4.11487.796-803","DOIUrl":"https://doi.org/10.9767/bcrec.16.4.11487.796-803","url":null,"abstract":"Flavanones are one of the flavonoid group that has wide variety of applications such as a precursors in drug discovery. In the laboratory, flavanone is often synthesized from chalcone compounds. The conversion of chalcone to flavanone can be catalyzed by bronsted acid. The reaction mechanism for this process is proposed through the Michael addition reaction, however, the energetic details and the rate determining step for this reaction is not certainly known. This research aimed to investigate the reaction mechanism for chalcone-flavanone conversion with the present of bronsted acid as catalyst and also studied the effect of the solvent on the reaction energy profile with computational method. In this study, the modeling of the reaction mechanism for the said reaction was carried out using the DFT computational method with M06-2X functional. The computation was done both in the gas phase and in present of the solvent effect using the PCM models. The results showed that the mechanism of chalcone-flavanone conversion occurred in three steps which are protonation, cyclization, and then tautomerization. Based on these calculations, the rate determining step was the tautomerization reaction, which exhibited the same results with or without the solvent effects. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45846632","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

A Novel Synthetic Nano-Catalyst (Ag2O3/Zeolite) for High Quality of Light Naphtha by Batch Oxidative Desulfurization Reactor 间歇式氧化脱硫反应器制备高质量轻石脑油的新型合成纳米催化剂(Ag2O3/沸石

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-07-30 DOI: 10.9767/bcrec.16.4.11383.716-732

A. Nawaf, Shymaa A. Hameed, Layth T. Abdulateef, A. Jarullah, M. Kadhim, I. Mujtaba

{"title":"A Novel Synthetic Nano-Catalyst (Ag2O3/Zeolite) for High Quality of Light Naphtha by Batch Oxidative Desulfurization Reactor","authors":"A. Nawaf, Shymaa A. Hameed, Layth T. Abdulateef, A. Jarullah, M. Kadhim, I. Mujtaba","doi":"10.9767/bcrec.16.4.11383.716-732","DOIUrl":"https://doi.org/10.9767/bcrec.16.4.11383.716-732","url":null,"abstract":"Oxidative desulfurization process (ODS), enhanced with a novel metal oxide (Ag ions) as an active component over nano-zeolite that has not been reported in the literature, is used here to improve the fuel quality by removing mercaptan (as a model sulfur compound in the light naphtha). Nano-crystalline (nano-support (Nano-zeolite)) composite is prepared by Incipient Wetness Impregnation method loaded with a metal salt to obtain 0.5, 1 and 1.5% of Ag2O3 over Nano-zeolite. The new homemade nano-catalysts (Ag2O3/Nano-zeolite) prepared are characterized by Brunauer–Emmett–Teller (BET) (surface area, pore volume and pore size), X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), and Scanning Electron Microscopy (SEM) analysis. The ODS process is then used to evaluate the performance of the catalysts for the removal of sulfur at different reaction temperatures (80–140 °C) and reaction times (30–50 min) in a batch reactor using the air as oxidant. 87.4% of sulfur removal has been achieved using 1% silver oxide loaded on Nano zeolite (1% of Ag2O3/Nano-zeolite) giving a clear indication that our newly designed catalyst is highly efficient catalyst in the removal of sulfur compound (mercaptan) from naphtha. A new mechanism of chemical reaction for sulfur removal by oxygen using the new homemade catalyst (Ag2O3/Nano-zeolite) prepared has been suggested in this study. The best kinetic model parameters of the relevant reactions are also estimated in this study using pseudo first order technique based on the experimental results. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43771438","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: 3

Oxytetracycline Mineralization inside a UV/H2O2 System of Advanced Oxidation Processes: Inorganic By-Product 高级氧化过程UV/H2O2系统中土霉素的矿化：无机副产物

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10308.302-309

A. U. Rahmah, S. Harimurti, K. A. Kurnia, A. Omar, T. Murugesan

{"title":"Oxytetracycline Mineralization inside a UV/H2O2 System of Advanced Oxidation Processes: Inorganic By-Product","authors":"A. U. Rahmah, S. Harimurti, K. A. Kurnia, A. Omar, T. Murugesan","doi":"10.9767/BCREC.16.2.10308.302-309","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10308.302-309","url":null,"abstract":"Oxytetracycline (OTC) was widely used antibiotic in agricultural industry. However, most of them were secreted from the body and entered the water stream, due to low absorption. The occurrence of the antibiotics in water stream may led to serious health hazards. Hence, finding the effective method that capable to achieve total mineralization of antibiotic-contaminated wastewater, followed by the production of benign inorganic and organic byproduct, was necessarily deemed. Photochemical degradation method, such as: UV/H2O2 system, was capable to achieve total mineralization of OTC at its optimized condition. In this paper, inorganic by-products of OTC mineralization inside a UV/H2O2 system at its optimum condition were analyzed. The presence of nitrate, ammonium, chloride ions, and chlorine were detected at the sample solution after mineralization. The presence of these inorganic by-product has proven that the experimental setup chosen was capable to achieve total mineralization. In addition, possible routes of the inorganic by-products detachment from the OTC’s structure, were also presented. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"302-309"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49355215","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: 1

Catalytic Pyrolysis of Municipal Solid Waste: Effects of Pyrolysis Parameters 城市生活垃圾催化热解:热解参数的影响

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10499.342-352

H. Almohamadi, A. Aljabri, E. R. Mahmoud, S. Khan, Me. Aljohani, R. Shamsuddin

{"title":"Catalytic Pyrolysis of Municipal Solid Waste: Effects of Pyrolysis Parameters","authors":"H. Almohamadi, A. Aljabri, E. R. Mahmoud, S. Khan, Me. Aljohani, R. Shamsuddin","doi":"10.9767/BCREC.16.2.10499.342-352","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10499.342-352","url":null,"abstract":"Burning municipal solid waste (MSW) increases CO2, CH4, and SO2 emissions, leading to an increase in global warming, encouraging governments and researchers to search for alternatives. The pyrolysis process converts MSW to oil, gas, and char. This study investigated catalytic and noncatalytic pyrolysis of MSW to produce oil using MgO-based catalysts. The reaction temperature, catalyst loading, and catalyst support were evaluated. Magnesium oxide was supported on active carbon (AC) and Al2O3 to assess the role of support in MgO catalyst activity. The liquid yields varied from 30 to 54 wt% based on the experimental conditions. For the noncatalytic pyrolysis experiment, the highest liquid yield was 54 wt% at 500 °C. The results revealed that adding MgO, MgO/Al2O3, and MgO/AC declines the liquid yield and increases the gas yield. The catalysts exhibited significant deoxygenation activity, which enhances the quality of the pyrolysis oil and increases the heating value of the bio-oil. Of the catalysts that had high deoxygenation activity, MgO/AC had the highest relative yield. The loading of MgO/AC varied from 5 to 30 wt% of feed to the pyrolysis reactor. As the catalyst load increases, the liquid yield declines, while the gas and char yields increase. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"342-352"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44696175","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: 3

Fe-doped TiO2/Kaolinite as an Antibacterial Photocatalyst under Visible Light Irradiation fe掺杂TiO2/高岭石作为可见光下的抗菌光催化剂

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10325.293-301

A. B. Aritonang, E. Pratiwi, W. Warsidah, S. Nurdiansyah, Risko Risko

{"title":"Fe-doped TiO2/Kaolinite as an Antibacterial Photocatalyst under Visible Light Irradiation","authors":"A. B. Aritonang, E. Pratiwi, W. Warsidah, S. Nurdiansyah, Risko Risko","doi":"10.9767/BCREC.16.2.10325.293-301","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10325.293-301","url":null,"abstract":"In this work, undoped and Fe-doped TiO2 immobilized on kaolinite surface was successfully synthesized by sol-gel method with various Fe concentrations (0.05, 0.125, and 0.25 wt%). The eﬀects of Fe doping into TiO2 lattice were thoroughly investigated by a diffuse reflectance UV-visible (DRS) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The optical band gap of undoped and Fe-doped TiO2/kaolinite is red shifted with respect to the incorporation of Fe3+ into the structure of TiO2 resulted band gap. The FTIR spectra shows a shift of peak at the wave number at 586 cm−1 and 774 cm−1 which is attribute of the Fe−O vibration as an indication of the formation of Fe-TiO2 bonds. Incorporation of Fe3+ cation into the TiO2 lattice replacing the Ti4+ ions, which induced a perturbation in anatase crystal structure, causes the change in the distance spacing of the crystal lattices dhkl(101) of 8.9632 to 7.9413. The enhanced photocatalytic performance was observed for Fe-doped TiO2/kaolinite compared with TiO2/kaolinite with respect to Escherichia coli growth inhibition in solution media under visible light irradiation. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"293-301"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47988424","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: 6

Reduction of 4-nitrophenol Mediated by Silver Nanoparticles Synthesized using Aqueous Leaf Extract of Peronema canescens 藤条叶提取物合成银纳米粒子介导还原4-硝基苯酚

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10426.253-259

S. Yudha S., Aswin Falahudin, R. H. Wibowo, J. Hendri, Dennie Oktrin Wicaksono

引用次数: 7

Investigating Photochromic Behavior of Organic Dyes in Solution Form using Multilevel Factorial Design 用多水平析因设计研究有机染料在溶液形式下的光致变色行为

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10496.353-365

Najiah Nadir, Z. Wahid, A. Shafie, F. Ahmad, M. T. Zainuddin

引用次数: 0

Comparative Study on Lipase Immobilized onto Organo-Cation Exchanged Kaolin and Metakaolin: Surface Properties and Catalytic Activity 有机阳离子交换高岭土和偏高岭土固定化脂肪酶的比较研究:表面性质和催化活性

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10230.214-233

Hana Meftah Elgubbi, S. Othman, F. Harun

{"title":"Comparative Study on Lipase Immobilized onto Organo-Cation Exchanged Kaolin and Metakaolin: Surface Properties and Catalytic Activity","authors":"Hana Meftah Elgubbi, S. Othman, F. Harun","doi":"10.9767/BCREC.16.2.10230.214-233","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10230.214-233","url":null,"abstract":"Clay mineral has received much attention to be used as biocatalysts as it is cheaper, easily available and environmentally friendly. However, the use of unmodified clay, in particular kaolin for enzyme immobilization showed unsuitability of this support due to its negative charge. In this study, the hydrophobic properties of kaolin and metakaolin (kaolin heated to 650 °C) were adjusted by the intercalation with benzyltriethylammonium chloride (BTEA-Cl), at concentrations 2.0 times the cation exchange capacities (CEC) of the clays. The supports were then used for immobilization of lipase from Candida rugosa (CRL). From the study, the highest percentage of lipase immobilization was achieved (70.14%), when organo-modified metakaolin (2.0 MK) was used. The supports as well as the immobilized biocatalysts were then characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption techniques. Comparisons of the efficiencies of immobilized with free CRL in the synthesis of nonyl hexanoate showed that immobilized CRL achieved enzymatic activities of between 5.24×10−3 to 3.63×10−3 mmol/min/mg, while free CRL achieved enzymatic activity of 3.27×10−3 mmol/min/mg after 5 h of reaction at 30 ℃. The immobilized CRLs also maintained 70.81% – 80.59% thermostabilities at 70 ℃ as compared to the free CRL (28.13%). CRL immobilized on 2.0 NK and 2.0 MK also maintained 38.54% and 62.56%, respectively, of the initial activities after 10 continuous cycles, showing the excellent stability and reusability of the immobilized lipases, suitable as substitute for expensive, hazardous catalysts used in industries. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"214-233"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42766637","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: 1

Cellulose and TiO2–ZrO2 Nanocomposite as a Catalyst for Glucose Conversion to 5-EMF 纤维素和TiO2-ZrO2纳米复合材料作为葡萄糖转化为5-EMF的催化剂

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10320.320-330

F. W. Dini, H. Helmiyati, Y. Krisnandi

{"title":"Cellulose and TiO2–ZrO2 Nanocomposite as a Catalyst for Glucose Conversion to 5-EMF","authors":"F. W. Dini, H. Helmiyati, Y. Krisnandi","doi":"10.9767/BCREC.16.2.10320.320-330","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10320.320-330","url":null,"abstract":"This work demonstrated the use of green material catalysts, produced from Sengon sawdust waste, to obtain nanocellulose biopolymers. The green material catalysts were utilized as catalysts support of TiO2−ZrO2 binary oxide in the form of nanocomposite materials with superior synergistic properties. The isolation of nanocellulose was achieved using a hydrolysis method with a yield of 63.40%. The TiO2 and ZrO2 nanoparticles have average particle sizes of around 25 and 15 nm, respectively, and the binary oxides of TiO2–ZrO2 pretained an average particle size of 30 nm were used. Furthermore, the nanocellulose combined with the TiO2−ZrO2 binary oxide had formed a cellulose/TiO2−ZrO2 nanocomposite with an average particle size of 30 nm. This indicates that the supporting nanocellulose can stabilize the nanoparticles and avoid aggregation. Moreover, the nanocomposites can be used as a catalyst for the conversion of glucose to 5-ethoxymethylfurfural (5-EMF). The catalytic activity increased with the nanoparticle effect obtained ZrO2, TiO2, TiO2-ZrO2, and cellulose and TiO2-ZrO2 nanocomposite, in 15.50%, 20.20%, 35.20%, and 45.50% yields, respectively. The best yield of 5-EMF was 45.50%, with reaction conditions of 1:1 TiO2–ZrO2 ratio, 4 h reaction time, and 160 °C reaction temperature. The use of nanocellulose biopolymer generated from Sengon sawdust waste in Indonesia provides a promising catalyst support material as an alternative green catalyst. In addition, the glucose carbohydrates can be converted to biofuel feedstocks in the development of a renewable alternative energy. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"320-330"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45942164","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: 6

Kinetic and Isotherm Studies of Nitrate Adsorption in Salt Water Using Modified Zeolite 改性沸石在海水中吸附硝酸盐的动力学及等温线研究

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10312.286-292

Kuntari Kuntari

{"title":"Kinetic and Isotherm Studies of Nitrate Adsorption in Salt Water Using Modified Zeolite","authors":"Kuntari Kuntari","doi":"10.9767/BCREC.16.2.10312.286-292","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10312.286-292","url":null,"abstract":"Nitrate is the main form of nitrogen species in natural waters. Excessive nitrate concentration in water is highly undesirable, so that removal of the excessive nitrates in waters is very important. However, the challenge is purposed to remove the excessive nitrates in sea waters by considering anions-rich sea water. Adsorption is a favorable method for the nitrate removal process. Therefore, this research was aimed to study the kinetics and isotherm of nitrates adsorption in salt water. The adsorbent preparation was done by modifying natural zeolite with iron oxide. The adsorbent characterization was carried out by FT-IR spectroscopy and Gas Sorption Analysis methods. The results showed that the modified zeolite have Fe−O group vibrations as indicated by a peak at a wave number of 1404.18 cm−1 and an increased specific surface area. The modified zeolite is capable of adsorbing nitrate ions. The adsorption isotherms studies indicated that the modified zeolite is appropriate to the Dubinin-Radushkevich model. The average adsorption energy value (ED), obtained based on the Dubinin-Radushkevich isotherm <2 kJ/mole, showed that the nitrate adsorption on zeolite surface occurred physically. The most suitable adsorption kinetics model is the pseudo second order with the rate constant of 1.8010−2 g/mg.min. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"286-292"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45811160","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