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{"title":"Complexation and photoinduced recoordination of bis(aza-18-crown-6)-containing dienones with alkali and alkaline earth metal cations, structure—property correlations","authors":"O. A. Alatortsev,&nbsp;V. V. Volchkov,&nbsp;M. Ya. Melnikov,&nbsp;M. V. Rusalov,&nbsp;M. V. Fomina,&nbsp;S. P. Gromov","doi":"10.1007/s11172-025-4758-4","DOIUrl":"10.1007/s11172-025-4758-4","url":null,"abstract":"<div><p>Analysis of absorption and fluorescence spectra at 293 and 77 K, as well as fluorescence excitation spectra of bis(aza-18-crown-6)-containing dibenzylidenecyclohexanone (CD6) and its complexes confirms the presence of photorecoordination in CD6•(M^<i>n</i>+)₂ (M = Ba²⁺, Sr²⁺, Ca²⁺, K⁺). The process is completely blocked in low-temperature butyronitrile glass. Coordination of the metal cation to the carbonyl group of the CD6 molecule is accompanied by fluorescence enhancement, while coordination of the cations to the aza-18-crown-6 ether residues, on the contrary, leads to its quenching. In the case of the complexes CD6•(M^<i>n</i>+)₂, correlations were observed between the stability constants, the values of the blue shifts in the absorption spectra, the red shifts in the fluorescence spectra, and the diameters of the cations. The CD6 dienone forms complexes with the compositions CD6•M^<i>n</i>+, CD6•(M^<i>n</i>+)₂, and M^<i>n</i>+•CD6•(M^<i>n</i>+)₂ with the cations Mg²⁺, Li⁺, and Na⁺. A correlation of the above-mentioned parameters with the cation surface charge density was observed for the complexes M^<i>n</i>+•CD6•(M^<i>n</i>+)₂. The possibility of influencing the efficiency of complexation and the degree of photorecoordination by varying the nature of the central acceptor fragment in the dye series CD4, CD5, CD6 (CD4 and CD5 are dyes similar to CD6 with central cyclobutanone (CD4) and cyclopentanone (CD5) fragments, respectively) was determined.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 9","pages":"2770 - 2779"},"PeriodicalIF":1.7,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the potential use of biobased syringic acid as a comonomer for fully aromatic copolyesters","authors":"P. A. Mikhaylov,&nbsp;Ya. V. Golubev,&nbsp;V. G. Kulichikhin","doi":"10.1007/s11172-025-4771-7","DOIUrl":"10.1007/s11172-025-4771-7","url":null,"abstract":"<div><p>Along with 4-acetoxybenzoic acid (4-ABA) and <i>O</i>-acetylvanillic acid (AVA), the syringic acid derivative <i>O</i>-acetylsyringic acid (ASA) can be used as an AB-type comonomer in polycondensation reactions. All three monomers have comparable polycondensation rates, and therefore the copolycondensation of 4-ABA, ASA, and AVA in the melt is expected to yield copolyesters with a random or nearly random macromolecular structure. From a mixture of ASA, 4-ABA, and 4′-acetoxybiphenyl-4-carboxylic acid (4-ABCA), a ternary thermotropic copolyester with a “liquid crystal glass” structure was synthesized. This copolyester has a lower softening temperature and a higher glass transition temperature compared to similar ternary copolyesters based on 4-ABA and 4-ABCA.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 9","pages":"2920 - 2928"},"PeriodicalIF":1.7,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of Polishing Aluminum Optical Components","authors":"Yu. D. Filatov,&nbsp;T. O. Prikhna,&nbsp;A. Y. Boyarintsev,&nbsp;V. I. Sidorko,&nbsp;S. V. Kovalev","doi":"10.3103/S106345762505003X","DOIUrl":"10.3103/S106345762505003X","url":null,"abstract":"<p>As a result of studying the regularities inherent in the process of treated material removal and the formation of a polished surface nanoprofile during the polishing of aluminum optical components with a disperse system of copper metaborate micro- and nanopowders, it has been established that the formation and elimination of sludge nanoparticles occurs due to energy transfer from the polishing powder particles to the treated surface by the QD-FRET mechanism of Förster resonance energy transfer mediated by Al₂O₃ quantum dots (QDs) formed on the surface of aluminum. It has been shown that the rate of treated material removal in the process of aluminum polishing with a disperse copper metaborate–kerosene based system depends on the quality factor of the microresonator formed by the surfaces of a treated material and a polishing powder particle and the lifetime of the excited state of quantum dots on the treated surface according to the general regularities of the polishing process. It has been established that the results of theoretical calculation for the treated material removal rate are in good agreement with the experimental data of measuring the aluminum polishing rate at an error of 1–5%. It has been demonstrated that, in terms of polishing rate and polished surface roughness for aluminum optical components, it is advisable to use a disperse system of copper metaborate micro- and nanopowders.</p>","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 5","pages":"388 - 395"},"PeriodicalIF":1.2,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complexes of Pivaloyltrifluoroacetonates of Potassium and Rubidium with 18-Crown-6 Ether: Synthesis, Structure, Thermal Properties","authors":"D. V. Kochelakov,&nbsp;E. S. Vikulova","doi":"10.1134/S1070328425600494","DOIUrl":"10.1134/S1070328425600494","url":null,"abstract":"<div><p>In a search for volatile fluorinated compounds of potassium and rubidium, new complexes of the corresponding pivaloyltrifluoroacetonates (Ptac) with 18-crown-6 ether, [K(18C6)(Ptac)] (<b>I</b>) and [Rb(18C6)(Ptac)] (<b>II</b>), were synthesized. The compounds were characterized by elemental analysis, IR spectroscopy, and X-ray fluorescence analysis, and their structures were studied by single-crystal X-ray diffraction (SCXRD) in the range of 100–400 K (CCDC nos. 2429226–2429232 (<b>I</b>), 2429233–2429239 (<b>II</b>)). The complexes are isostructural and have an molecular mononuclear structure, with M…H and M…C contacts involving the <i>tert-</i>butyl group between fragments, forming chains. The thermal expansion tensors are elongated along this direction. X-ray diffraction analysis showed that the rubidium cation in such a complex can complete its coordination sphere with a solvent molecule (chloroform, CCDC no. 2429240 (<b>IIs</b>)). For <b>I</b>, <b>II</b>, and <b>IIs</b>, Hirshfeld surface were analyzed and a search for pseudoperiodicity in the crystal packings was carried out using the translational sublattice method. Thermogravimetric analysis showed that, unlike the initial pivaloyltrifluoroacetonates, complexes <b>I</b> and <b>II</b> are volatile and promising for testing in gas-phase processes of thin-film material deposition.</p></div>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"595 - 606"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selection of superior Persian walnut (Juglans regia L.) genotypes from seedling-originated trees in the North-Western Himalayan region based on morphological characterization using multivariate analysis","authors":"Megha Ahir,&nbsp;Jitender K. Chauhan,&nbsp;Dharam Paul Sharma,&nbsp;Vishal S. Rana,&nbsp;R. K. Dogra,&nbsp;Girish Dangi","doi":"10.1007/s00114-025-02012-z","DOIUrl":"10.1007/s00114-025-02012-z","url":null,"abstract":"<div><p>The current research study was undertaken with the aim of evaluating 98 distinct walnut genotypes from the existing seedling population and assessing 26 qualitative and 21 quantitative morphological and physiological characteristics pertaining to trees, leaf, nut and kernel traits. The results revealed a significant degree of diversity among the examined walnut genotypes. A strong positive and negative association in evaluated morphological and physiological traits was identified through the analysis of correlation coefficients. Moreover, principal component analysis (PCA) applied to qualitative and quantitative characters successfully explained a notable amount of the entire variation, with the first nine and six PCs explaining 65.89 % and 78.81 % of variability, respectively. Using Ward’s clustering method with the Euclidean distance metric, a hierarchical dendrogram was generated, in which two major groups were identified among the walnut genotypes, each of which subsequently partitioned into multiple smaller sub-clusters. This classification underscores the substantial genetic variability among the walnut genotypes, highlighting their potential for targeted breeding programs. Notably, genotypes distributed across different clusters present promising candidates for hybridization, facilitating the development of novel walnut varieties with desirable traits. The dendrogram illustrating the evaluated characteristics clearly demonstrates significant differentiation among the genotypes, emphasizing distinct variations. The integration of molecular techniques with conventional morphological assessments could further enhance the accuracy of genetic differentiation, thereby offering a more reliable and comprehensive approach to genotype classification and selection.</p></div>","PeriodicalId":794,"journal":{"name":"The Science of Nature","volume":"112 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of free volume using positron annihilation study in Ag2O-doped ZnO-P2O5-SeO2 glass ceramics","authors":"M. Kostrzewa,&nbsp;G. Naga Koti Reddy,&nbsp;A. Venkata Sekhar,&nbsp;A. Ingram,&nbsp;N. Purnachand,&nbsp;G. Sahaya Baskaran,&nbsp;G. Naga Raju,&nbsp;V. Ravi Kumar,&nbsp;Nalluri Veeraiah","doi":"10.1007/s00339-025-09028-2","DOIUrl":"10.1007/s00339-025-09028-2","url":null,"abstract":"<div><p>Glass ceramics with the composition ZnO–P₂O₅–SeO₂ doped with varying amounts of silver oxide (Ag₂O) were synthesized. The effect of Ag₂O on atomic vacancy formation was studied using positron annihilation lifetime spectroscopy (PALS). XRD and SEM studies confirmed the presence of Ag₃PO₄, Ag₂SeO₃ crystal phases, and Ag⁰ nanoparticles in the glassy matrix. Infrared spectroscopy showed that increasing Ag₂O content enhanced the fraction of Ag⁰ nanoparticles in the glass network while decreasing the fraction of ZnO₄ and [SeO₄]²⁻ units. This change indicated an increase in free volume defects, such as voids, that trap positrons. Analysis of positron annihilation lifetime spectra revealed an increase in the longest-lived component (I₃) and its lifetime (τ₃) with higher Ag₂O concentrations, indicating greater void expansion and agglomeration in the glass ceramic. These findings correspond to changes in ac conductivity and suggested that these glass ceramics could be developed as solid electrolytes for solid-state batteries.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 11","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and magnetic tailoring of Co-Cu ferrite nanoparticles via Cd2+ substitution: a multi-characterization approach","authors":"D. El-Said Bakeer,&nbsp;M. Y. El Sayed,&nbsp;E. M. Abdallah,&nbsp;R. Awad,&nbsp;S. G. Elsharkawy","doi":"10.1007/s00339-025-08897-x","DOIUrl":"10.1007/s00339-025-08897-x","url":null,"abstract":"<div><p>This study investigates the structural and magnetic tunability of Co–Cu ferrite nanoparticles via dual-site substitution of Cd²⁺ at both Co²⁺ and Cu²⁺ lattice sites in the Co_0.5Cu_0.5Fe₂O₄ spinel lattice. Nanoparticles with the nominal composition Co_0.5−xCu_0.5−xCd_2xFe₂O₄ (x = 0.00, 0.01, 0.02, 0.04, 0.06) were synthesized using an efficient co-precipitation method. The large ionic radius of Cd²⁺ promotes its occupation of tetrahedral sites, which disrupts the magnetocrystalline anisotropy associated with Co²⁺ and the Jahn–Teller distortions associated with Cu²⁺, leading to cation redistribution, modifications in superexchange interactions, and potentially the initiation of spin canting. Compared to single-site doping, this dual-site substitution introduces greater structural and magnetic complexity, offering a promising approach for multifunctional ferrite design. X-ray diffraction (XRD) confirmed a predominant face-centered cubic spinel phase with Co_0.5Cu_0.5Fe₂O₄ as the primary phase and a minor hematite (Fe₂O₃) secondary phase. Increasing Cd²⁺ content induced a systematic lattice parameter expansion and crystallite size reduction (from 15.47 nm to 12.11 nm), indicating lattice distortion due to ionic substitution. TEM analysis showed quasi-spherical, slightly agglomerated nanoparticles with sizes decreasing from 15.47 nm to 12.11 nm as x increased from 0.00 to 0.06. HRTEM confirmed the material’s polycrystalline nature through observed (220) and (311) lattice fringes. FTIR spectra displayed two characteristic absorption bands 510–580 cm⁻¹ and 400–450 cm⁻¹) confirming spinel formation, while Raman spectroscopy revealed a blue shift in the <span>(:{A}_{1g})</span>mode, associated with Fe³⁺ migration towards tetrahedral sites. Additionally, XPS analysis confirmed the oxidation states of the constituent elements in the samples as Co²⁺, Cu²⁺, Fe³⁺, Cd²⁺and O²⁻. Vibrating sample magnetometry (VSM) measurements showed ferromagnetic hysteresis loops with a non-linear variation of saturation magnetization (<span>(:{M}_{s})</span>) and a significant reduction in coercivity (<span>(:{H}_{c})</span>) from 851.98 G to 306.06 G, reflecting progressive magnetic softening with Cd²⁺ incorporation. Complementary, ESR analysis showed asymmetric resonance line shapes, a downshift in <span>(:{H}_{r})</span>, and an enhancement in the Landé <span>(:g)</span> -factor, which was consistent with modifications in the local magnetic environment. These tunable structural and magnetic properties highlight the potential of Cd-substituted Co–Cu ferrites for applications in high-frequency electronics and EMI shielding.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 11","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00339-025-08897-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new elemental analytical approach for microplastic sum parameter analysis-ETV/ICP-MS with CO₂.","authors":"Vera M Scharek, Tommy Kröger, Karin Keil, Heike Traub, Björn Meermann","doi":"10.1007/s00216-025-06146-x","DOIUrl":"https://doi.org/10.1007/s00216-025-06146-x","url":null,"abstract":"<p><p>Microplastics (MPs) are pervasive environmental pollutants and are considered one of the main challenges of our time. However, a fast and comprehensive analytical approach for MP analysis in complex matrices traceable to SI units is still lacking. In this context, we report a fast screening tool for the sum parameter analysis of MPs using electrothermal vaporization (ETV) coupled to inductively coupled plasma-mass spectrometry (ICP-MS). In our proof-of-concept study, we observed size-independent detection of MPs as peaks above the ¹³C⁺ signal background in the nano- to micrometer range without limitations regarding the polymer type. Quantification of the ¹³C⁺ MP signals was accomplished via an external gas calibration utilizing dynamic dilution of carbon dioxide with argon, yielding recovery rates of 80-96% for MP reference material (RM) of polymer types commonly found in the environment. The applicability to a soil sample was demonstrated through spiking experiments with a polyethylene (PE) MP RM in soil. The limit of detection (LOD) was estimated to be 0.13 µg C, equaling the detection of a single spherical low-density-PE particle of about 70 µm, and a limit of quantification (LOQ) of 0.42 µg C.</p>","PeriodicalId":462,"journal":{"name":"Analytical and Bioanalytical Chemistry","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145328003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-step synthesis of PtCo/ZSM-5 catalysts for preferential CO oxidation in a hydrogen excess","authors":"M. I. Shilina,&nbsp;I. N. Krotova,&nbsp;O. V. Udalova,&nbsp;I. P. Stolyarov,&nbsp;N. V. Cherkashina,&nbsp;T. N. Rostovshchikova","doi":"10.1007/s11172-025-4756-6","DOIUrl":"10.1007/s11172-025-4756-6","url":null,"abstract":"<div><p>A new one-step method for the synthesis of the PtCo/ZSM-5 catalysts for CO oxidation was proposed. Heteronuclear acetate complexes of the empirical composition PtCo_<i>x</i>(AcO)_<i>y</i> containing Pt^II and Pt^IV in ratios with Co of 1: 1 or 1: 2 were used as precursors. According to the data of scanning and transmission electron microscopy and XPS, the impregnation of the HZSM-5 zeolite (Si/Al = 28) with a solution of the complexes in glacial acetic acid followed by decomposition at 200 or 300 °C leads to the stabilization of highly dispersed partially reduced Pt^δ+ particles interacting with cobalt ions on the zeolite surface. Their joint action and a possibility of formation of new Pt—O_<i>x</i>—Co sites active in the preferential oxidation of CO ensure high efficiency and selectivity of the process in an H₂ excess. At the relatively low Pt content from 0.1 to 0.3 wt.%, the complete conversion of CO on these catalysts is achieved in the wide temperature range from 50 to 130 °C.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 9","pages":"2753 - 2764"},"PeriodicalIF":1.7,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Biochemical Indicator of the Effectiveness of Isometric Exercises in Early Rehabilitation of Elderly Patients after Hip Arthroplasty","authors":"E. A. Maksimova,&nbsp;V. I. Shevchenko,&nbsp;K. S. Krasnov,&nbsp;A. S. Senotov,&nbsp;O. V. Lobanova,&nbsp;V. S. Akatov","doi":"10.1134/S0006350925700587","DOIUrl":"10.1134/S0006350925700587","url":null,"abstract":"<div><p>Improving the effectiveness of early rehabilitation of elderly patients after hip arthroplasty remains an urgent task. The aim of the study was to evaluate the effectiveness of isometric exercises in early (2 weeks) rehabilitation of elderly patients after hip replacement using blood parameters. The randomized study included ten elderly patients in the control (<i>n</i> = 5) and experimental (<i>n</i> = 5) groups with isometric exercises and rehabilitation techniques that were performed daily from 1 to 12 days after total cement hip arthroplasty. The effectiveness of rehabilitation was assessed by the indices of muscle traumatization (myoglobin, creatine phosphokinase, aspartate aminotransferase, and lactate dehydrogenase concentrations) and systemic inflammation (erythrocyte sedimentation rate, CRP concentrations, and interleukins IL-6, IL-8, and IL-1β) in the blood of patients on the 12th day after surgery. The indices of muscle traumatization and the concentrations of C-reactive protein and leukocytes in blood, as well as the erythrocyte sedimentation rate did not reveal any significant difference between the groups of patients. The difference between the control and experimental groups in terms of restoration of interleukin IL-6, IL-8, and IL-1β concentrations in the blood to the normal range was statistically significant according to Fisher’s exact test (<i>p</i> = 0.042). In general, these results showed that additional isometric exercises provided more effective early rehabilitation of elderly patients after endoprosthesis in comparison with the standard set of exercises and that normalization of the concentration of proinflammatory interleukins, primarily IL-6 and IL-8, can be considered as an objective indicator in assessing the effectiveness of methods of early rehabilitation of elderly patients after hip arthroplasty.</p></div>","PeriodicalId":493,"journal":{"name":"Biophysics","volume":"70 3","pages":"553 - 560"},"PeriodicalIF":4.033,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327615","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}