Journal of Polymers and the Environment最新文献

{"title":"Highly-Porous Plasticized Polylactide Foams with Bi-modal Structure Prepared via a Combined Economical Process: Processing-Morphology-Performance Correlations","authors":"Pedram Bahrami,&nbsp;Danial Abbasi,&nbsp;Ali Matin,&nbsp;Reyhane Shahpouri,&nbsp;Farkhondeh Hemmati,&nbsp;Jamshid Mohammadi-Roshandeh","doi":"10.1007/s10924-025-03491-x","DOIUrl":"10.1007/s10924-025-03491-x","url":null,"abstract":"<div><p>In this work, highly porous biodegradable poly(lactic acid) (PLA) foams with bi-modal architecture were prepared by using the melt-compounding process in a twin-screw extruder and filler leaching technique. The highly-filled composites of PLA/salt porogen were extruded and then, subjected to distilled water to obtain lightweight inter-connected nano- and micro-cellular structure for foams with 100% open cell content. The density of PLA diminished from 1.14 g/cm³ to 0.3 g/cm³ by using these simple and economical preparation methods. In the presence of poly(ethylene glycol) (PEG) plasticizer, the void content of open-cell PLA foam reached 72%. The bi-modal cell size distribution of foams was created by the partial miscibility of PLA/PEG phase and salt. The cell density of prepared foams rose to 6 × 10⁷ cells/cm³ by adding 15 wt% PEG to the PLA melt. The presence of PEG in the PLA melt affected the microstructure and mechanical properties of foams by altering the melt viscosity and surface tension. These open-cell bi-modal porous foams, which are biocompatible and biodegradable, can be applied in biomedical and pollutant adsorption applications. The adsorption capacities of the open-cell foams were measured for different solvents and marine pollutants. The adsorption capacity of these foams reached 4 g/g for carbon tetrachloride.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1423 - 1444"},"PeriodicalIF":4.7,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction to: Structure Development in Cross-Linked, Soybean Oil-based Waterborne Polyurethanes","authors":"Zoran S. Petrović,&nbsp;Jasna Djonlagić,&nbsp;Jian Hong,&nbsp;Milica Lovrić Vuković,&nbsp;Jan Ilavsky,&nbsp;Brian G. Bush,&nbsp;Fan Zhang","doi":"10.1007/s10924-024-03473-5","DOIUrl":"10.1007/s10924-024-03473-5","url":null,"abstract":"","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 4","pages":"2109 - 2109"},"PeriodicalIF":4.7,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-024-03473-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A 3D-Printed Bone Scaffold of Carboxymethyl Chitosan/Gelatin/Akermanite: Synthesis and Evaluation","authors":"Elsa Mamaghani,&nbsp;Mahmoud Azami,&nbsp;Mohammad Nikkhoo","doi":"10.1007/s10924-024-03484-2","DOIUrl":"10.1007/s10924-024-03484-2","url":null,"abstract":"<div><p>In this study, carboxymethyl chitosan/gelatin/Akermanite (CMC/GEL/AK)-based scaffolds were prepared for bone tissue regeneration via 3D printing method. The bioactive AK was synthesized and used to fabricate the scaffolds. The AK powder was analysed through scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and X-ray diffraction (XRD). The porous scaffolds were fabricated and characterized to show their ability in bone tissue engineering (BTE). Degradation rate, swelling ratio, and mechanical properties of the scaffolds containing AK have been significantly increased. The scaffolds possess the interconnected networks with the pore size of about 300–900 μm. The mechanical strength increased up to 2.6 MPa by adding 20% AK to the scaffolds. In addition, cell viability and cell attachment studies exhibited the viability of up to 80%. This study confirms the potential of fabricated biocomposites in non-load-bearing bone defect regeneration.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1374 - 1388"},"PeriodicalIF":4.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Life Cycle Assessment of Cellulose Encapsulated Essential Oils as Pesticide and Preservative Alternatives","authors":"Koranit Shlosman,&nbsp;Dmitry M. Rein,&nbsp;Rotem Shemesh,&nbsp;Yachin Cohen,&nbsp;Or Galant,&nbsp;Sabrina Spatari","doi":"10.1007/s10924-024-03477-1","DOIUrl":"10.1007/s10924-024-03477-1","url":null,"abstract":"<div><p>Cellulose, a natural and biodegradable polymer, is finding use as an encapsulation agent for essential oils (EOs) used for food preservation and as a natural pesticide. Here, we evaluate the environmental performance of cellulose encapsulated EOs as alternatives to a commercial pesticide (pyridazine) and preservative (propionic acid) using life cycle assessment (LCA). A cradle-to-gate model of a scaled process that uses cellulose from agricultural residues to encapsulate EOs was evaluated via the ReCiPe 2016 midpoint life cycle impact assessment (LCIA) metrics for climate change impact, fossil resource scarcity and human and ecosystem toxicity. The encapsulated EOs were compared with functionally equivalent quantities of pesticide and preservative expected for application in crop production and food preservation, based on their minimum inhibitory concentrations. Results showed that the encapsulated EOs can significantly lower impacts when used as a pesticide substitute for pyridazine but have comparable or higher impacts if substituting for the preservative propionic acid for all impact categories. To investigate how the LCA results would be affected by variations in process parameters (i.e. energy input) and bridge the limitations of this LCA, of a scale-up process, we varied energy input by +/-10%, which resulted with a minor change in all metrics studied. This LCA finds environmental and resource saving benefits of applying cellulose encapsulated EOs compared to commercial pesticides used in agriculture, which could be extended to food and cosmetic preservation through process optimization.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1389 - 1402"},"PeriodicalIF":4.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Phenolic Contaminants Removal from Aqueous Solution by Grafting of Allyl Glycidyl Ether-Allyl Alcohol onto Zinc Sulfide Nanoparticles","authors":"Leila Hazratian,&nbsp;Homayon Ahmad Panahi,&nbsp;Lobat Taghavi,&nbsp;Elham Moniri,&nbsp;Hamideh Nouri","doi":"10.1007/s10924-024-03469-1","DOIUrl":"10.1007/s10924-024-03469-1","url":null,"abstract":"<div><p>This work comparatively evaluated the removal efficiency of nonylphenol (NP) and bisphenol A (BPA) from aqueous solutions by zinc sulfide nanoparticles (ZnS NPs) functionalized with allyl glycidyl ether (AGE) and allyl alcohol (AA). The characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy with energy dispersive spectrometer (FE-SEM/RDX), and thermogravimetric (TG) analyses were applied to compare the crystal structure, functional groups, shape change and elemental composition and the thermal behavior, respectively. The conditions for the removal of NP and BPA were predicted using the response surface methodology (RSM) via the central composite design (CCD). The effects of pH (A: 3–9), temperature (B: 20–40 °C), and contact time (C: 10–30 min) were examined using an experimental design. Using the optimized condition (pH = 6, temperature = 20 ºC, and contact time = 20 min), their sorption capacity of them reached 15.32 and 32.58 mg g⁻¹, respectively, and the removal efficiency of NP and BPA reached 96.26 and 85.11%, respectively. Among the isotherm models, Langmuir in non-linearized forms was well fitted for both pollutants (NP; R² &gt; 0.9956, SSE = 0.600 and BPA; R² &gt; 0.9917, SSE = 0.310). Kinetic studies shown that, pollutants adsorption complied with pseudo-second-order kinetic models (BPA; R² &gt; 0.9995, SSE = 0.150 and NP; R² &gt; 0.9995, SSE = 0.08). The capability analysis of the RSM-CCD model was investigated using the correlation coefficient and some statistical error functions such as the average relative error (ARE), root mean square error (RMSE), Hybrid Fractional Error Function (HYBRID), and the Chi-square test (χ²). It was observed that nanoadsorbent could be commonly applied for NP and BPA removal up to eight and nine times without noticeable decrease in its removal efficiency, respectively. According to the obtained data, it can be shown that the nanoadsorbent has an appropriate ability to remove phenolic compounds from aqueous solutions, which suggests promising perspectives for its practical application in pollutant treatment scenarios.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1353 - 1373"},"PeriodicalIF":4.7,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plasticizing PLA with Biobased Fatty Esters: Comprehensive Study on Film Properties","authors":"Ignacio Mena-Prado,&nbsp;Marta Fernández-García,&nbsp;Enrique Blázquez-Blázquez,&nbsp;Alexandra Muñoz-Bonilla,&nbsp;Adolfo del Campo","doi":"10.1007/s10924-024-03454-8","DOIUrl":"10.1007/s10924-024-03454-8","url":null,"abstract":"<div><p>ACETEM (E472a) and CITREM (E472c) are fatty acid esters used as additives in the food industry to improve quality, stability and sensory properties of food products due to their emulsifying, stabilizing properties, and antioxidant and antimicrobial activities. Herein, we have explored their use as active plasticizers in one of the most used biobased polymers, polylactic acid (PLA). Initially, different CITREMs (LR10, SP70, RO and VEG) and ACETEM (SOFT-NSAFE), with a variety of compositions and physical states at room temperature, were characterized. The studied fatty acid esters demonstrate good thermal stability and moderate to good antioxidant properties. Subsequently, PLA films containing 10% of the tested fatty acid esters were prepared by melt extrusion and posterior compression molding. The obtained films were analyzed by different characterization techniques to evaluate their role as active plasticizers. Raman confocal microscopy showed that SOFT-NSAFE is homogeneously distributed in the PLA films, whereas CITREMs form microdomains due to their immiscibility with PLA. The incorporation of these plasticizers decreases the tensile strength, Young’s modulus and glass transition temperature. However, only CITREM-LR10 is able to significantly enhance the elongation at break of PLA up to 42%, due to the elongation and orientation of the microdomains along the cracks formed during the tensile test. Additionally, their incorporation provides antioxidant properties to the PLA films, being CITREM LR10, SP70 and SOFT-NSAFE that impart higher activity. In terms of antimicrobial activity, CITREM-LR10 showed effectiveness against <i>S. aureus</i>, while SOFT-NSAFE was active against <i>L. innocua</i> bacteria. These results open the possibility to use such CITREM and ACETEM food additives as plasticizers in films for a variety of applications such as active food packaging.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1337 - 1352"},"PeriodicalIF":4.7,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-024-03454-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Stretching Direction on Dielectric Property of Poly(Lactic acid)/Nano-silver Coated Microcrystalline Cellulose Biocomposite Films","authors":"Kanthita Sitisan,&nbsp;Kankavee Sukthavorn,&nbsp;Nollapan Nootsuwan,&nbsp;Piyawanee Jariyasakoolroj,&nbsp;Chatchai Veranitisagul,&nbsp;Apirat Laobuthee","doi":"10.1007/s10924-024-03483-3","DOIUrl":"10.1007/s10924-024-03483-3","url":null,"abstract":"<div><p>This study investigates the dielectric effects of bidirectional stretching (BO), which involves both machine (MDO) and transverse (TDO) directions, on poly(lactic acid) and nano-silver coated microcrystalline cellulose. The experiments employed stretching ratios of 2 × 2, 3 × 3, and 4 × 4. Results indicate that BOPLA-Ag/MCC4, which underwent the highest biaxial stretching ratio, exhibited the most significant increase in dielectric constant. The BOPLA-MCC4 and BOPLA-Ag/MCC4 demonstrated the highest dielectric constants, measuring 48 and 53, respectively. This increase can be attributed to the reorganization of molecular chains, leading to higher structural order and crystallinity, which promotes dipole and interface polarization. Biaxial stretching also enhances the mobility of polar polymer chains, enabling a stronger response to electric fields. Conversely, unidirectional stretching can reduce polymer chain disruption, limiting the movement of polar polymers and leading to a drop in dielectric properties. Consequently, biocomposite films stretched in biaxial directions demonstrate superior dielectric properties, indicating their potential for dielectric applications and suitability as environmentally friendly, biodegradable films.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1321 - 1336"},"PeriodicalIF":4.7,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gelatin-Chitosan Based Composite Films Enriched with Satureja kermanshahensis Jamzad Essential Oil Nanoemulsion and Carbon Dots: Characterization and Functional Properties","authors":"Hossein Hashemi,&nbsp;Behzad Ebrahimi,&nbsp;Farhang Hameed Awlqadr,&nbsp;Narges Sarraf Ov,&nbsp;Hadiseh Ebdali,&nbsp;Zahra Sarlak,&nbsp;Leila Bahrami,&nbsp;Reza Mohammadi","doi":"10.1007/s10924-024-03476-2","DOIUrl":"10.1007/s10924-024-03476-2","url":null,"abstract":"<div><p>Gelatin-chitosan-based (GL-CS) functional films were synthesized by incorporating a nanoemulsion (NE) containing the essential oil (EO) of <i>Satureja kermanshahensis Jamzad</i>, commonly referred to as “<i>Marzeh Kermanshahi</i>” (MK) in Persian. These films also incorporated different concentrations (1%, 2%, and 3%) of carbon dots (CDs) derived from citric acid and urea. The physical, mechanical, optical, structural, and barrier characteristics, alongside the assessment of antioxidant and antibacterial efficacy of the resultant films, were thoroughly characterized and examined. The sizes of MK-EONE and CDs, as measured by a Zetasizer, were determined to be 118 nm and 1.2 nm, respectively. Fourier-Transform Infrared (FTIR) spectra and Scanning Electron Microscopy (SEM) of the films indicated favorable compatibility between both polymers, MK-EONE, and 1% CD, with uniform dispersion within the polymer matrix. The composite film containing MK-EONE and 1% CD exhibited enhanced UV protection, mechanical properties, and glass transition temperature (T_g). However, certain characteristics, such as water solubility, water vapor permeability (WVP), hydrophobicity, and transparency, demonstrated a decrease. Furthermore, the films incorporating MK-EONE and CDs demonstrated strong antioxidant activity, assessed through the DPPH method, and potent antimicrobial effectiveness against foodborne pathogens like <i>Staphylococcus aureus</i>, <i>Bacillus cereus</i>, and <i>Escherichia coli</i>. Consequently, the GL-CS-MK-EONE-CDs film, characterized by its superior functional attributes, shows promise for applications in food packaging.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1292 - 1307"},"PeriodicalIF":4.7,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Blending and Conjugation of Carboxymethyl Cellulose and Zein in Bioplastic Materials","authors":"Fahimeh Alsadat Seyedbokaei,&nbsp;Manuel Felix,&nbsp;Carlos Bengoechea","doi":"10.1007/s10924-024-03482-4","DOIUrl":"10.1007/s10924-024-03482-4","url":null,"abstract":"<div><p>Carboxymethyl cellulose (CMC) can be extracted from agricultural waste and better employed in the formulation of bioplastics to promote sustainability. Zein, a hydrophobic prolamin protein that can be obtained from industrial wastes of the corn industry. It may be combined with hydrophilic CMC, resulting in composite materials where both functionalities are synergistically enhanced. In the zein/CMC systems studied in the present work, CMC was added directly in the mixing stage. Physical interactions take place as blends are formed, and the effect of the CMC concentration was studied from 5–30%. At the highest CMC concentration, those blend systems were compared to conjugated systems, where prior chemical conjugation of both biopolymers was carried out at 60°C for 48 h. The physical and chemical interactions between the biopolymers certainly affected the viscoelastic properties of the eventually obtained injection-moulded bioplastics. Thus, samples softened after the addition of CMC, independent of the procedure followed. Thus, the addition of CMC always resulted in a reduction in the viscoelastic moduli (i.e., E’ decreased from approximately 900 MPa in the absence of CMC to 265 MPa in the presence of 30% CMC, either blended or conjugated). Conversely, the samples presented much higher water uptake capacity (WUC) values when conjugation was carried out. Therefore, the WUC of zein bioplastics (approximately 200%) increased to 950% for 30% conjugated CMC, which is almost twice the value obtained when the same amount of CMC was added in the mixing stage. Biodegradable biocomposite materials obtained through conjugation could be of great interest for developing hydrophilic green materials.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1308 - 1320"},"PeriodicalIF":4.7,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Make it or break it: A review on PHA synthase and depolymerase proteins","authors":"Isabel Vital-Vilchis,&nbsp;Esther Karunakaran","doi":"10.1007/s10924-024-03474-4","DOIUrl":"10.1007/s10924-024-03474-4","url":null,"abstract":"<div><p>Petroleum-based plastics are recalcitrant world-wide used materials that severely pollute the environment, thus biodegradable bioplastics are emerging as a viable alternative. From this group, the study of polyhydroxyalkanoates (PHAs) has stood out for their potential in diverse applications including medicine, packaging and agriculture. The enzyme responsible for PHAs synthesis inside the microbial cell is the PHA synthase (PhaC). PhaCs are present in a wide variety of microorganisms and are classified according to their substrate specificity and subunit composition into 4 classes. Class I, class III and class IV use the acyl-CoA as a precursor to synthesize short-chain-length PHAs while Class II enzymes use an intermediate of the β-oxidation pathways to synthesize medium-chain-length PHAs. Enzymes from this pathway that have been upregulated and downregulated to optimize PHAs production are described in this review. Another important enzyme is the PHA depolymerase (PhaZ) which is responsible for all PHA degradation inside and outside the cell. This review describes both enzymes in detail, including classification, structure, substrate specificity and proven protein engineering techniques for enzymatic rate enhancement and modified substrate specificity of the proteins. It also includes a mutation map for the class II PhaC sequence of <i>Pseudomonas putida</i> that suggest point mutations for future protein engineering work.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1267 - 1291"},"PeriodicalIF":4.7,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-024-03474-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}