Korean Journal of Chemical Engineering最新文献

{"title":"Deep Learning for Green Chemistry: An AI-Enabled Pathway for Biodegradability Prediction and Organic Material Discovery","authors":"Dela Quarme Gbadago,&nbsp;Gyuyeong Hwang,&nbsp;Kihwan Lee,&nbsp;Sungwon Hwang","doi":"10.1007/s11814-024-00202-5","DOIUrl":"10.1007/s11814-024-00202-5","url":null,"abstract":"<div><p>The increasing global demand for eco-friendly products is driving innovation in sustainable chemical synthesis, particularly the development of biodegradable substances. Herein, a novel method utilizing artificial intelligence (AI) to predict the biodegradability of organic compounds is presented, overcoming the limitations of traditional prediction methods that rely on laborious and costly density functional theory (DFT) calculations. We propose leveraging readily available molecular formulas and structures represented by simplified molecular-input line-entry system (SMILES) notation and molecular images to develop an effective AI-based prediction model using state-of-the-art machine learning techniques, including deep convolutional neural networks (CNN) and long-short term memory (LSTM) learning algorithms, capable of extracting meaningful molecular features and spatiotemporal relationships. The model is further enhanced with reinforcement learning (RL) to better predict and discover new biodegradable materials by rewarding the system for identifying unique and biodegradable compounds. The combined CNN-LSTM model achieved an 87.2% prediction accuracy, outperforming CNN- (75.4%) and LSTM-only (79.3%) models. The RL-assisted generator model produced approximately 60% valid SMILES structures, with over 80% being unique to the training dataset, demonstrating the model’s capability to generate novel compounds with potential for practical application in sustainable chemistry. The model was extended to develop novel electrolytes with desired molecular weight distribution.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revolutionizing Dye Removal: Unleashing the Power of Liquid–Liquid Extraction Batch Process","authors":"Kedar Sahoo,&nbsp;Uma Sankar Behera,&nbsp;Sourav Poddar,&nbsp;Hun-Soo Byun","doi":"10.1007/s11814-024-00203-4","DOIUrl":"10.1007/s11814-024-00203-4","url":null,"abstract":"<div><p>This study focuses on numerically optimizing key process parameters related to the liquid–liquid extraction batch process (LLEBP) technique for carrying out batch runs to remove methyl red effectively (MR) from dye effluent. LLEBP, a suitable industrial process for treating dye effluents, depends on the number of reaction parameters such as feed concentration, extraction time, and dye ratio (solution/solvent). The current research utilized a central composite design (CCD) of experiments along with numerical optimization techniques to optimize process parameters over a range of dye concentrations: (20–100) ppm, extraction time range 10–30 min, and dye ratio 1–3 mL/mL (solution/solvent). The batch runs performed at room temperature and a constant pH of 3, according to the experimental design criteria, suggest that maximum dye removal efficiency and distribution coefficient value could be achieved within the feed concentration range of (20–30) ppm, 20–30 min of extraction time, and 1–3 mL/mL of dye ratio (solution/solvent). Solvent capacity increases significantly within the (60–100) ppm feed concentration range. Numerical optimization with desirability function criteria identified optimal conditions: 20 ppm dye concentration, 30 min extraction time, and 3 mL/mL dye ratio ensuring maximum LLEBP yield. The current investigation achieved a 4% higher dye removal (%) of 85.682 compared to the previous study. The distribution coefficient and solvent capacity attained were 5.287 and 4.504 mg/L, respectively. The research enhances understanding of the optimization process for LLEBP in MR dye removal from textile effluent, surpassing previous findings within the same input range. The manuscript aims to maximize process optimization using CCD, promoting sustainable industry progress in line with UN sustainable development goals.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Analysis of the Influence of Side Slot and Fin Heights in a Hypervapotron Channel on Heat Transfer","authors":"Iljin Kim,&nbsp;In-Yeop Kang,&nbsp;Gubin Lee,&nbsp;Hyungdae Kim","doi":"10.1007/s11814-024-00206-1","DOIUrl":"10.1007/s11814-024-00206-1","url":null,"abstract":"<div><p>Hypervapotron is a water-cooled device which relies on internal fins and boiling heat transfer to sustain ultra-high heat flux in the range of 20–30 MW/m² from thermonuclear fusion reactor. This study investigated the design optimization of hypervapotron cooling channels using multiphase computational fluid dynamic simulation. With focus on geometric variations in fin heights and side slots installed to the cooling channel, their effects on the cooling performance and internal flow pattern of these channels were evaluated. The obtained results revealed that the incorporation of side slots significantly enhanced cooling performance by promoting bidirectional fluid inflow and optimizing heat dissipation. It was also found that adjusting fin heights significantly contributed to improved thermal management by ensuring smoother liquid ingress and effective heat exchange. This work established a link between design variations and cooling performance, providing insights and guidelines for advanced engineering of hypervapotron systems.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141362602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal–Organic Frameworks for Aromatic-Based VOC Decomposition","authors":"Thach N. Tu,&nbsp;Nhung Thi Tran,&nbsp;Quoc Hao Nguyen,&nbsp;Van Nhieu Le,&nbsp;Jinsoo Kim","doi":"10.1007/s11814-024-00199-x","DOIUrl":"10.1007/s11814-024-00199-x","url":null,"abstract":"<div><p>Metal–organic frameworks (MOFs) are a class of porous materials based on the strong coordinated bonds between inorganic secondary building units (SBUs) and organic linkers to form high-porosity periodic structures. MOFs with tunable pore size, shape, and catalysis active sites recently sparked recognition interest for the design and synthesis of catalysts with the capability to decompose aromatic-based VOCs. In this review, we introduce our viewpoints for the design and synthesis of better MOF-based photocatalysts including (i) methods to enhance the interaction of aromatic-based VOCs with MOFs by controlling micropore size, tuning Lewis acidity of the metal SBUs and/or using linkers bearing electron withdrawal groups; (ii) methods to enhance adsorption/diffusion by synthesizing hierarchical MOFs through defect control, reticular structural design and/or employing the xerogel monoliths to exploit the mesopore between particles for enhancing the adsorption/diffusion; (iii) methods to optimize the band gap by selecting appropriate building block and/or doping with exotic components. Alongside that, design principles and strategies for the development of MOF-based catalysts for thermal decomposition of aromatic-based VOCs are also provided such as (i) the need to improve the thermal stability at high temperature together with a slit pore architecture connected by small windows to prevent the aggregation of active components; and (ii) methods to control the distribution and type of active components in the MOFs’ matrix to alter their catalysis performance. We expect our discussion and viewpoints on the design and synthesis of MOFs and MOF-based composites to inspire researchers to design better and more efficient systems for aromatic-based VOC decomposition.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141368534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic Recyclable Double-Heterojunction SrFe12O19/SnS2/MoS2 Nanophotocatalyst: Synthesis and Visible-Light Catalytic Degradation Performance Study","authors":"Bi Jia,&nbsp;Qian Cai,&nbsp;Yongjiang Di,&nbsp;Huichao He,&nbsp;Tao Han,&nbsp;Hanmei Jiang,&nbsp;Shiyu Lu,&nbsp;Rong Wang,&nbsp;Yue Shi","doi":"10.1007/s11814-024-00204-3","DOIUrl":"10.1007/s11814-024-00204-3","url":null,"abstract":"<div><p>The development of efficient, recyclable, broad-spectrum photocatalysts was the primary objective in the field of photocatalytic wastewater degradation. Herein, a novel highly efficient ternary magnetic semiconductor composite was synthesized by integrating SrFe₁₂O₁₉, MoS₂ nanoflower clusters, and SnS₂ nanoflowers using high-temperature calcination and a one-step solvothermal method. The synthesized heterojunction nanocomposite was characterized using numerous analytical techniques, and its photocatalytic activity was evaluated under half sunlight intensity irradiation. The integration of SnS₂ with SrFe₁₂O₁₉ and MoS₂ effectively modified the crystal structure and morphology of SnS₂ nanoflowers, leading to an increase in active sites while overcoming the significant electron–hole recombination rates of the individual components. The SrFe₁₂O₁₉/SnS₂/MoS₂ composite achieved 98.69% degradation of MB dye at a suitable pH of 6 and a period of 120 min of irradiation. Additionally, it maintained an excellent magnetic phenomena which contributed to it effortless to collect and reclaim from the residual mixture. After three cycles, the MB dye degradation remained at 84.07%, demonstrating its endurance and resilience. The scavenger test identified the superoxide radical as the primary agent responsible for dye destruction. This work provides study presents a synthesis method for highly efficient photocatalysts using in natural visible-light that can be recovered by simply applying an external magnetic field.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141373271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Performance of All Iron-Based Redox Flow Batteries Enhanced by Carbon Nanotube Catalysts","authors":"Sungmin Park,&nbsp;Mingyu Shin,&nbsp;Ulrich Kunz,&nbsp;Yongchai Kwon","doi":"10.1007/s11814-024-00200-7","DOIUrl":"10.1007/s11814-024-00200-7","url":null,"abstract":"<div><p>Carbon nanotubes (CNTs) are applied as catalysts to improve redox reaction of iron and 2,2-bis(hydroxymethyl)-2,2',2''-nitrilotriethanol (Fe(BIS–TRIS)) complex as negolyte of iron-based flow batteries (FBs). Especially, multi-walled CNT (MWCNT) and carboxylic acid-functionalized MWCNT (CACNT) are adopted as the catalysts. Effects of the catalysts are electrochemically analyzed. CACNT is expected to have a better performance than MWCNT due to its abundant hydrophilic functional groups. However, MWCNT is more effective catalyst than CACNT for improving redox reactivity of Fe(BIS–TRIS). This is because carboxylic acid groups of CACNT are deprotonated to form COO⁻ ions in aqueous electrolytes. FB single cell tests show that energy efficiency (EE) is 80.2% without catalyst at 80 mA cm⁻², but the EE increases when catalyst is doped at negative electrode. When MWCNT and CACNT are doped, EE is 84.0 and 83.5%. The lower performance of CACNT is because of electrostatic repulsion occurring between anionic Fe(BIS–TRIS) molecules and COO⁻ ions. Therefore, a larger overpotential is formed in the case of CACNT than MWCNT. This means when electrode is treated by catalyst, interaction of active material and catalyst should be considered.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141385449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-base Metal Organic Frameworks as Potential CO2 Adsorbents","authors":"Jiawei Zhang,&nbsp;Jingjing Ma,&nbsp;Chen Liu,&nbsp;Qi Wang,&nbsp;Yiling Xu,&nbsp;Long Fang,&nbsp;Kai Xia,&nbsp;Deshuai Sun","doi":"10.1007/s11814-024-00201-6","DOIUrl":"10.1007/s11814-024-00201-6","url":null,"abstract":"<div><p>Environmental friendliness and high adsorption capacity are important properties of CO₂ adsorbents. Bio-based metal–organic framework (bioMOFs) materials offer notable benefits for CO₂ capture. Amino acids like <span>l</span>-glutamic acid (Glu) and L-aspartate (Asp) are employed as ligands for the synthesis of bioMOFs, Asp-Cu and Glu-Cu. Characterization results confirmed that Asp-Cu and Glu-Cu possessed tertiary amine and secondary amine structures, respectively. The adsorption capacities of Glu-Cu and Asp-Cu were up to 253 mg·g⁻¹ and 277 mg·g⁻¹ at 1 bar CO₂ pressure and 190 mg·g⁻¹ and 223 mg·g⁻¹ at 0.15 bar CO₂ pressure. The CO₂ adsorption properties of bioMOFs were comprehensively evaluated under various conditions, including temperature, water content, SO₂ concentration, and other compositions. Adsorption data were fitted well with the pseudo-first-order kinetics and Weber-Morris intraparticle diffusion model. The kinetic studies revealed that a small amount of water significantly accelerated the pseudo-first-order kinetic constants, whereas excess water vapor greatly hindered the intra-diffusion constants of CO₂. The presence of SO₂ led to a decrease in the adsorption capacity of both MOFs due to rapid reactions occurring with active sites on the MOF surface. Furthermore, these bioMOFs were easily recovered and regenerated for at least 20 cycles. The primary CO₂ adsorption mechanism involved catalytic hydration reactions on Asp-Cu, while chemical adsorption occurred on Glu-Cu. Both mechanisms were accompanied by physical adsorption.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141252024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accessing of Viable Bacteria Captured by Antimicrobial Filters in a Metropolitan Subway of South Korea","authors":"Sangwon Ko,&nbsp;Ki Hoon Park,&nbsp;Jae-Young Lee,&nbsp;Young Bong Kim","doi":"10.1007/s11814-024-00198-y","DOIUrl":"10.1007/s11814-024-00198-y","url":null,"abstract":"<div><p>In subway stations, where passengers are crowed in enclosed spaces with restricted ventilation, airborne microorganisms have been detected, potentially contributing to the spread of infectious aerosols. In South Korea’s metropolitan subways, air purifiers are installed on platforms to reduce particulate matter. Efficiency particulate air (EPA) filters in air purifiers lack disinfection capabilities and can serve as a source of airborne pathogens during filter replacement. In this field study, antimicrobial filters were applied to air purifiers installed on a subway platform to assess their ability to reduce the captured microorganisms. After 1 week of operation, the microbiomes were collected from both the control and test filters, followed by microbial identification. Additionally, the composition of metal elements was analyzed using particulate matter collected by the EPA filters. While 19 types of bacterial species were detected in control filters, the antimicrobial filters showed the presence of 15 bacterial species, with overall 64.71% of antibacterial efficacy. Specifically, the antimicrobial filter exhibited 100% reduction in <i>Micrococcus</i> and 93.75% reduction in <i>Staphylococcus</i> genus, related to anthropogenic sources.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141188202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Uranium and Thorium Co-contaminant Exposure from Incidental Concrete Dust Ingestion","authors":"Nur Shahidah Abdul Rashid,&nbsp;Wooyong Um,&nbsp;Albert L. Juhasz,&nbsp;Ibrahim Ijang,&nbsp;Kok Siong Khoo,&nbsp;Bhupendra Kumar Singh,&nbsp;Nurul Syiffa Mahzan,&nbsp;Siti Khadijah Maliki","doi":"10.1007/s11814-024-00193-3","DOIUrl":"10.1007/s11814-024-00193-3","url":null,"abstract":"<div><p>Potential health risks of contaminated media linked to bioavailability and hematotoxicity of uranium-238 (²³⁸U) and thorium-232 (²³²Th) remain uncertain. This study investigates the relative bioavailability (RBA), histopathological, and hematological effects of acute oral exposure to ²³⁸U and ²³²Th in co-contaminated concrete dust using 174 female Sprague Dawley (SD) rats. In order to create a range of ²³⁸U and ²³²Th concentrations, concrete was spiked with uranyl and thorium nitrates (~ 50, 100, and 200 mg kg⁻¹). Spiked concretes were then crushed, ground, sieved (≤ 75 µm), and blended uniformly to create co-contaminated concrete dust. SD rats’ diet pellet was amended with co-contaminated concrete dust and orally ingested over a 48-h exposure period. The RBA values of ²³⁸U and ²³²Th in blood samples from rats’ post-exposure were determined as 22.0% ± 0.86% to 30.8% ± 1.01% and 11.8% ± 0.14% to 13.7% ± 0.29%, respectively. Compared to ²³²Th, ²³⁸U blood levels of SD rats fed with co-contaminated concrete dust-amended diets were ~ 100-fold higher due to solubility differences, and ²³⁸U-RBA values were approximately 2-fold greater, revealing that their absorption rates in the gastrointestinal tract were affected by compound solubility. Post-acute ²³⁸U and ²³²Th ingestion from co-contaminated concrete dust demonstrate noticeable histopathological and hematological alterations, implying that intake of ²³⁸U and ²³²Th in co-contaminated concrete dust can lead to erythrocytes damage and elevated hematological attributes. Our study would be beneficial for an adequate understanding of the health implications caused by the acute oral exposures of ²³⁸U and ²³²Th in co-contaminated concrete dust, especially in the bioavailability and toxicity assessment.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141188204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amino Acid-Modified Porous Carbon Foams Derived from Wheat Powder with Enhanced Adsorption Performance for VOCs","authors":"Xinhan Chai,&nbsp;Weiqiu Huang,&nbsp;Xufei Li,&nbsp;Xinya Wang,&nbsp;Yankang Zhou,&nbsp;Bing Zhu,&nbsp;Yuning Li,&nbsp;Xinchen Tian","doi":"10.1007/s11814-024-00195-1","DOIUrl":"10.1007/s11814-024-00195-1","url":null,"abstract":"<div><p>Porous carbon foam (PCF), known for its high surface area and abundant functional groups, is considered to exhibit superior adsorption capacity and wide applicability for gases. Wheat, being a widely cultivated and easily accessible crop globally, contains abundant carbon elements. In this study, wheat powder served as the carbon precursor, and β-alanine, rich in amino and carboxyl groups, was introduced into the hierarchical pore structure of wheat powder. Subsequently, the material underwent secondary hydrothermal treatment with the activation agent potassium hydroxide (KOH), resulting in hydrothermal wheat powder PCF (HWPCF) rich in a three-dimensional interconnected structure with layered pores as the representative feature. This structural treatment increased the specific surface area (2278 m²·g⁻¹) and total pore volume (1.17 cm³·g⁻¹) of PCF, accelerating the rapid mass transfer of gas molecules and significantly enhancing the utilization of adsorption sites in the modified PCF. HWPCF exhibited outstanding adsorption performance for acetone (608.7 mg g⁻¹) and n-hexane (517.6 mg g⁻¹). In addition, the modified PCF showed good adsorption capacity for CO₂ (4.99 mmol·g⁻¹). This study highlights the effective modification of expired wheat powder with β-alanine, reducing the overall carbon footprint of the production process and achieving the reuse of waste in an environmentally friendly manner.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141170427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}