Bulletin of Materials Science最新文献

{"title":"Design and performance analysis of low-voltage light shutter devices using graphene oxide-doped cholesteric liquid crystals: Electro-optical and dielectric perspectives","authors":"Gülsüm Kocakülah,&nbsp;Gülnur Önsal,&nbsp;Oğuz Köysal","doi":"10.1007/s12034-026-03730-4","DOIUrl":"10.1007/s12034-026-03730-4","url":null,"abstract":"<div><p>In this study, graphene oxide (GO)-doped cholesteric liquid crystal (CLC) composites were designed and analyzed to investigate their electro-optical and dielectric properties. Samples comprising pure CLC and CLC containing 0.5 wt.% and 1.0 wt.% GO were prepared. The morphological characteristics and optical transmittance behavior were examined under an applied voltage at a constant frequency, with particular emphasis on the planar (P) and focal-conic (FC) states. These states correspond to transparent and opaque optical responses, respectively. The observations confirmed that all samples exhibited high transparency in the P-state and transitioned to the opaque FC-state upon voltage application. The incorporation of GO significantly reduced the transition voltage required for the P-to-FC transition. Furthermore, the response time parameters were evaluated, revealing that the response time decreased with increasing GO incorporation into the CLC. Dielectric analysis further demonstrated that increasing the GO concentration lowered the relaxation frequency and increased the relaxation time, indicating enhanced dipolar interactions and weakened anchoring effects. Overall, the results demonstrate that GO-doped CLC composites exhibit improved electro-optical performance and tunable dielectric behavior, making them promising candidates for low-power light shutters and advanced photonic device applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751759","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":"Nanostructured Pr2FeCrO6 double perovskite: A promising material for oxygen evolution reaction catalysis","authors":"Jitesh Pani,&nbsp;Rupesh K Muddelwar,&nbsp;Rakesh Nanna,&nbsp;Vinay Palaparthy,&nbsp;Vishwajit M Gaikwad,&nbsp;Hitesh Borkar","doi":"10.1007/s12034-026-03676-7","DOIUrl":"10.1007/s12034-026-03676-7","url":null,"abstract":"<div><p>The nanostructured Pr₂FeCrO₆ (PFCO) double perovskite was explored as an efficient electrocatalyst for the oxygen evolution reaction (OER). Structural studies confirm an orthorhombic crystal structure with nanoscale-induced unit cell expansion and Fe/Cr–O–Fe/Cr bond angle stretching. X-ray photoelectron spectroscopy (XPS) reveals Pr³⁺, Fe³⁺, and Cr³⁺ oxidation states with strong metal–oxygen hybridization, contributing to improve charge transfer kinetics. The valence band maximum (VBM) observed at ~1.2 eV highlights electronic structure modifications and enhanced electron transport. Electrochemical studies demonstrate an overpotential of 352.4 mV at 10 mA/cm² and a Tafel slope of 376.05 mV/dec after 200 CV cycles. Chronoamperometry confirms electrode stability over 12.5 prolonged hours, making PFCO a promising OER catalyst. The mechanistic analysis suggests an efficient electron transfer mediated by Pr, Fe, and Cr active sites, stabilizing oxygenated intermediates. These findings highlight the role of nanoscale structural distortions and electronic hybridization in optimizing PFCO for OER applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751799","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":"MOFs-derived LaMnxFe1-xO3 perovskite oxides as efficient catalysts for methane oxidation","authors":"Hongdan Shen,&nbsp;Qiuyao Jiao,&nbsp;Jilian Wang,&nbsp;Kexin Zhu,&nbsp;Rong Zheng,&nbsp;Ran Yu,&nbsp;Lei Li","doi":"10.1007/s12034-026-03743-z","DOIUrl":"10.1007/s12034-026-03743-z","url":null,"abstract":"<div><p>The design and development of highly efficient catalysts are essential for the removal of air pollutants through catalytic oxidation. In this study, the structural and surface properties of LaFeO₃ perovskite oxides were effectively tailored using a dual strategy involving MOF-assisted synthesis and Mn doping, resulting in significantly enhanced CH₄ oxidation activity. Among the investigated catalysts, LaMn_0.1Fe_0.9O₃-SG exhibited the best catalytic performance, achieving <i>T</i>₅₀ and <i>T</i>₉₀ values of 495 and 577 °C, respectively. Comprehensive characterization revealed that the enhanced catalytic activity is primarily attributed to the increased specific surface area generated by the MOF-assisted synthesis strategy, which provides more accessible active sites for CH₄ adsorption and activation. In addition, Mn doping modifies the surface electronic structure, leading to the formation of abundant lattice oxygen species and enhancing oxygen activation and mobility through the Mars–van Krevelen (MvK) mechanism. The synergistic effects of the MOF-assisted synthesis strategy and Mn doping effectively regulate the structural and surface properties of the perovskite oxides, resulting in superior catalytic performance. This study provides an effective strategy for the rational design of high-performance perovskite catalysts for environmental catalytic applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751968","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":"Using TiO2 nanoparticles to enhance the performance of acrylic-based emulsion coating: The role of calcination and surface modification","authors":"Figen Aynali,&nbsp;Merve Demirkurt Akbal,&nbsp;Zeynep Yilmazer,&nbsp;Mustafa M Demir","doi":"10.1007/s12034-026-03665-w","DOIUrl":"10.1007/s12034-026-03665-w","url":null,"abstract":"<div><p>Silane-coupling-agent-modified titanium dioxide (TiO₂) nanoparticles were incorporated into emulsion polymerization to enhance the barrier properties and mechanical durability of acrylic-based coatings. TiO₂ nanoparticles were synthesized by a precipitation method using titanium (IV) n-butoxide and subsequently functionalized with a methacrylate-functional silane coupling agent to improve their dispersion within an acrylic emulsion matrix. A portion of the nanoparticles was calcined at 400°C in air prior to modification, enabling a systematic comparison between calcined and non-calcined samples. The calcined and silane-modified nanoparticles exhibited reduced agglomeration and more homogeneous dispersion compared to those modified without calcination. Composite emulsions were synthesized with 1 wt% silane-modified TiO₂ relative to the total acrylic monomer content, and the resulting coatings were applied on cold-rolled steel panels. The protective performance of these coatings was evaluated through corrosion resistance, humidity tolerance, and UV stability tests using colorimetric analyses. The results demonstrated that, although unmodified anatase TiO₂ is generally associated with photo-oxidative degradation in exterior coatings, its calcined and silane-modified form at low loading effectively suppressed photocatalytic activity and enhanced compatibility with the acrylic matrix. Consequently, coatings containing calcined and silane-modified TiO₂ exhibited superior barrier properties, reduced porosity, and enhanced long-term durability under corrosive, humid, and UV-exposed conditions. Overall, the study establishes calcination combined with silane modification as a viable strategy for producing environmentally friendly, anti-corrosive, and high-performance waterborne acrylic coatings.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751869","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":"Evaluation of the physical attributes of LiScNiX (X = Ge, Sn) compounds: A comparative PBE-GGA vs. TB-mBJ study","authors":"Noor Fatima,&nbsp;Laiba Akhlaq,&nbsp;Noram Sadia,&nbsp;Muhammad Mazhar,&nbsp;Farah Andleeb,&nbsp;Sadia Malik,&nbsp;Muhammad Nasir Rasul","doi":"10.1007/s12034-026-03715-3","DOIUrl":"10.1007/s12034-026-03715-3","url":null,"abstract":"<div><p>Quaternary Heusler compounds are highly regarded for their versatility, making them attractive candidates for a wide range of functional applications, including thermoelectric devices, photoconductive systems, spintronics, and catalytic technologies. This study investigates the optoelectronic and elasto-mechanical properties of LiScNiX (X = Ge and Sn) compounds. The investigation was carried out using two computational codes (WIEN2k and VASP) and two exchange-correlation functionals (GGA and mBJ) within the framework of density functional theory. The compounds successfully passed the stability tests, confirming their structural robustness. Among the three structural types considered, the type-1 structure of the LiScNiX compounds was found to be the most stable, with band gaps of 0.685 (0.606) eV for LiScNiGe and 0.425 (0.385) eV for LiScNiSn, as calculated using the GGA (mBJ) functional, making these compounds promising candidates for optoelectronic applications. Crystal orbital Hamilton population (COHP) analysis revealed comparatively stronger bonding interactions for the Ni–Sc pair, which are critical for the structural stability of these materials. In addition, a comprehensive investigation of the optoelectronic properties, including the band structure, density of states, dielectric function, extinction coefficient, reflectivity, optical conductivity, absorption coefficient, net effective number of electrons, and energy-loss function, was performed. The physico-mechanical properties confirmed that the LiScNiX compounds are mechanically anisotropic and brittle. Overall, the findings indicate that these materials are promising candidates for applications in sensors, radiation detectors, solar cells, and waveguides.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751476","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":"Cellulose and its derivatives in high-energy explosives: Research progress, emerging applications, and future perspectives","authors":"Bian Hongli,&nbsp;Zhang Yuanchao,&nbsp;Yu Peng,&nbsp;Yu Ran,&nbsp;Jia Huili,&nbsp;Yin Tao,&nbsp;Jin Zhiwei,&nbsp;Zou Wenqi","doi":"10.1007/s12034-026-03691-8","DOIUrl":"10.1007/s12034-026-03691-8","url":null,"abstract":"<div><p>Cellulose and its derivatives are among the most abundant renewable natural polymers and exhibit excellent mechanical properties, high tensile strength, good thermal stability, and low mechanical sensitivity. Owing to these advantageous characteristics, they have found widespread applications in diverse fields, including medical devices, papermaking, cosmetics, food processing, combustible cartridge cases, propellants, and the desensitization of high-energy explosives. This review systematically summarizes recent research progress on the application of cellulose and its derivatives in combustible cartridge cases, propellants, and high-energy explosives, with particular emphasis on the challenges and limitations associated with their use in energetic-material systems. Recent advances are comprehensively analyzed, and future prospects for the development and application of cellulose derivatives in energetic materials are discussed.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751477","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":"Effect of graphene nanoplatelet reinforcement on the thermal and mechanical performance of stereolithography-printed PLA","authors":"Muzammil Ahmed Khan,&nbsp;Faizan Mohammad Rashid,&nbsp;Ngoc San Ha,&nbsp;R Velmurugan","doi":"10.1007/s12034-026-03727-z","DOIUrl":"10.1007/s12034-026-03727-z","url":null,"abstract":"<div><p>Additive manufacturing offers an effective approach for fabricating lightweight architected materials; however, incorporating nanofillers into photopolymer systems remains challenging because of limited interfacial compatibility. This study investigated the influence of graphene nanoplatelet (GNP) reinforcement on the performance of stereolithography (SLA)-printed polylactic acid (PLA)-based composites and structures. Composites containing 0, 0.1, 0.3, and 0.5 wt.% GNPs were fabricated and evaluated by tensile, flexural, and compressive testing to assess their stiffness, strength, and energy absorption. Structural characterization using FESEM, XRD, FTIR, and TGA revealed that, although the GNPs were dispersed throughout the matrix, they did not establish an effective interfacial interaction with the PLA matrix. Consequently, the nanoplatelets acted as stress concentrators rather than effective reinforcements. Increasing the GNP content resulted in increased brittleness, nanoplatelet pull-out, and premature crack initiation. Compared with neat PLA, the composites exhibited substantial reductions in tensile strength (up to ~67%), flexural strength (~35%), and compressive energy absorption (~65%). These findings demonstrate that, in the absence of engineered interfacial compatibility, the incorporation of graphene nanoplatelets degrades the mechanical performance of SLA-printed PLA composites, highlighting the critical role of interfacial engineering in the design of high-performance 3D-printed nanocomposites.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751103","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":"Phase evolution and kinetics of MoAlB phase alloy in pressure-less sintering","authors":"Madhubala A,&nbsp;Manikandan S G K,&nbsp;Uma Rani R,&nbsp;Kamaraj M","doi":"10.1007/s12034-026-03703-7","DOIUrl":"10.1007/s12034-026-03703-7","url":null,"abstract":"<div><p>In the present work, the pressure-less sintering synthesis of the MoAlB phase is investigated extensively. MoAlB was synthesized by milling the elemental powders, followed by pressure-less sintering. Elemental characterization was performed to evaluate the purity and particle size of the powders. Four synthesis parameters were investigated through both theoretical and experimental approaches to understand their influence on achieving a high-purity MoAlB phase. Thermal analysis revealed that MoAlB decomposes into aluminum borides, molybdenum borides, and molybdenum aluminides. Transmission electron microscopy and Raman spectroscopy were also performed to confirm the formation of the ternary phase after synthesis. The results indicate that reducing the binary-phase content is the determining factor in MoAlB alloy development. Phase analysis also infers that the formation of binary phases increases at higher temperatures and longer holding times. The phase formation tendency is further supported by CALPHAD analysis. The reaction pathway followed during synthesis was evaluated using the activation energy derived from X-ray diffraction analysis.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751449","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":"Synergistic effects of nano-TiO2 and carbon black on the hydrogen storage kinetics of AZ31 and AZ61 magnesium alloys","authors":"Song-Jeng Huang,&nbsp;Hao-Lun Yuan,&nbsp;Naser Einollahi,&nbsp;Sathiyalingam Kannaiyan","doi":"10.1007/s12034-026-03748-8","DOIUrl":"10.1007/s12034-026-03748-8","url":null,"abstract":"<div><p>This study investigated the individual and combined effects of nano-TiO₂ (1 wt.%) and carbon black (CB, 1 wt.%) on the hydrogen storage behavior of AZ31 and AZ61 Mg alloys. Eight compositions, including pristine, TiO₂-only, CB-only, and TiO₂+CB-modified samples, were prepared by high-energy ball milling and evaluated through isothermal hydrogen absorption and desorption tests at 325, 350, and 375 °C. RIR-based XRD semi-quantitative analysis was employed to compare MgH₂ formation after hydrogenation, while differential scanning calorimetry (DSC) and the Kissinger method were used to determine the apparent activation energies. The CB-only samples exhibited limited and matrix-dependent effects on hydrogen sorption behavior. In contrast, the TiO₂-containing samples generally showed enhanced hydrogen sorption performance, with the TiO₂+CB composites exhibiting the best overall performance. Among all the investigated compositions, AZ61+TiO₂+CB exhibited the highest hydrogen absorption capacity of 5.61 wt.% at 375 °C and retained 5.22 wt.% at 325 °C. Similarly, AZ31+TiO₂+CB achieved hydrogen absorption capacities of 5.55 wt.% at 375 °C and 4.01 wt.% at 325 °C. For the AZ61 series, the apparent activation energy decreased markedly from 196.07 to 119.32 kJ mol⁻¹ following dual-additive modification. In the AZ31 series, however, the activation energy of AZ31+TiO₂+CB was higher than that of the TiO₂-only sample, indicating that the catalytic response is matrix dependent. The RIR-based MgH₂ fractions closely followed the hydrogen uptake trends, and AZ61+TiO₂+CB retained 96.3% of its hydrogen storage capacity after 45 hydrogen absorption–desorption cycles. Overall, TiO₂ provided the primary catalytic effect, whereas CB promoted improved powder dispersion and facilitated hydrogen transport.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751450","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 analysis of Y1−xSmxBaSrCu3O6+z and evolution of lattice parameters under heat treatments","authors":"Mohammed ID ELAMEL,&nbsp;Mohammed Bellioua,&nbsp;Fatima Bouzit,&nbsp;Omar Sliman,&nbsp;Ahmed Tirbiyine,&nbsp;Mohammed Khenfouch,&nbsp;Lahcen Ait lamine","doi":"10.1007/s12034-026-03713-5","DOIUrl":"10.1007/s12034-026-03713-5","url":null,"abstract":"<div><p>This study investigates the effect of heat treatment on the crystal structure of Y_1–xSm_xBaSrCu₃O_6+z compounds, where <i>x</i> = 0, 0.6, and 1. The samples were synthesized using the conventional ceramic method and subjected to two thermal protocols: annealing in oxygen ([O]) and annealing in argon followed by oxygen ([AO]). X-ray diffraction analysis combined with Rietveld refinement revealed significant variations in the lattice parameters as a function of samarium content and thermal treatment. The [AO] protocol generally enhanced the orthorhombicity, reflecting improved oxygen ordering within the Cu(1)O chain plane. In contrast, for Sm-rich compositions, the [O] treatment induced a pseudo-tetragonal structure. The [AO] treatment increased the <i>b</i> lattice parameter and decreased the <i>a</i> parameter for Sm-substituted samples, whereas for YBaSrCu₃O_6+z both parameters increased, resulting in a weaker enhancement of the orthorhombicity, defined as <i>ε</i> = (<i>b</i> − <i>a</i>)/(<i>b</i> + <i>a</i>). These structural modifications directly influenced the hole concentration in the Cu(2)O₂ planes and accounted for the observed variations in the superconducting critical temperature, <i>T</i>_c. This work demonstrates, for the first time, the combined effect of samarium substitution and two distinct thermal treatment protocols ([O] and [AO]) on the crystal structure and lattice parameters of Y_1–xSm_xBaSrCu₃O_6+z compounds. The study reveals that the [AO] treatment enhances orthorhombicity through improved oxygen ordering, whereas the [O] treatment induces pseudo-tetragonal structures in Sm-rich compositions. These structural modifications directly affect the hole concentration in the Cu(2)O₂ planes, providing new insights into the correlation between lattice distortions and the superconducting critical temperature, <i>T</i>_c, in this family of compounds.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751201","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}