Rheologica Acta最新文献

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Microrheological characterisation of clay-PEO nanocomposites 粘土- peo纳米复合材料的微流变学表征
IF 3 3区 工程技术
Rheologica Acta Pub Date : 2025-06-06 DOI: 10.1007/s00397-025-01499-7
Iliya D. Stoev, Anasua Mukhopadhyay, Rene Tammen, Erika Eiser
{"title":"Microrheological characterisation of clay-PEO nanocomposites","authors":"Iliya D. Stoev,&nbsp;Anasua Mukhopadhyay,&nbsp;Rene Tammen,&nbsp;Erika Eiser","doi":"10.1007/s00397-025-01499-7","DOIUrl":"10.1007/s00397-025-01499-7","url":null,"abstract":"<div><p>Clay-polymer mixtures, characterised by high mechanical stiffness, are widely utilised in strengthening soft and easy-to-break materials. Here, we present microrheological results on shake-gels made of natural (montmorillonite) and synthetic (Laponite) disk-shaped clay particles in combination with poly(ethyleneoxide). These clay-polymer suspensions represent shear-thickening fluids that display a large increase in viscosity upon large-amplitude shaking. By performing both bulk and microrheology experiments, we probe the phase behaviour and mechanical response of these nanocomposites. Slight tuning of either the particle or polymer concentration leads to dramatic changes in the macroscopic appearance of the mixture, transitioning from a low-viscosity fluid to a stiff gel, capable of sustaining its own weight. We relate these observations to microscopic measurements, providing insight into the local reorganisation of the constituting building blocks and the time-evolution of each phase.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 4-5","pages":"241 - 253"},"PeriodicalIF":3.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-025-01499-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162876","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}
引用次数: 0
Rheological enhancement of high-volume fly ash mixes using ternary mineral blends and chemical additives 利用三元矿物共混物和化学添加剂增强大体积粉煤灰的流变性
IF 3 3区 工程技术
Rheologica Acta Pub Date : 2025-06-04 DOI: 10.1007/s00397-025-01500-3
Shaghayegh Sadeghzadeh Benam, Sami Berat Tever, Taner Yilmaz, Zeynep Basaran Bundur
{"title":"Rheological enhancement of high-volume fly ash mixes using ternary mineral blends and chemical additives","authors":"Shaghayegh Sadeghzadeh Benam,&nbsp;Sami Berat Tever,&nbsp;Taner Yilmaz,&nbsp;Zeynep Basaran Bundur","doi":"10.1007/s00397-025-01500-3","DOIUrl":"10.1007/s00397-025-01500-3","url":null,"abstract":"<p>Cement production contributes significantly to global <span>( mathrm {CO_2} )</span> emissions, creating an urgent need for alternative construction materials. This study proposes a novel ternary mineral-mixed high-volume fly ash (HVFA) system that replaces <i>a significant portion of cement</i>, reducing the reliance on chemical additives and environmental impact. Comparative evaluations were conducted using a commercial viscosity-modifying agent (VMA), sepiolite (SEP), slaked lime (SL), and unslaked lime (UL) as rheology modifiers. A step-by-step mix design assessed the effects of each material on rheological properties, including yield stress, viscosity, and thixotropy. SL and UL improved dynamic and static yield stress with SL showing greater effects. VMA enhanced early-age structural build-up, while SEP exhibited a delayed response, contributing to rheological stability over time. Sensitivity analysis revealed that the combination of SL and VMA mainly influenced the HVFA rheology at early ages. This ternary HVFA system demonstrates the potential to minimize cement consumption and improve fresh-state performance.</p>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 4-5","pages":"225 - 239"},"PeriodicalIF":3.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-025-01500-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161873","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}
引用次数: 0
The dynamic mechanical properties of EPDM rubber based on the fractional derivative constitutive model 基于分数阶导数本构模型的三元乙丙橡胶动态力学性能研究
IF 3 3区 工程技术
Rheologica Acta Pub Date : 2025-05-28 DOI: 10.1007/s00397-025-01496-w
Rongguo Zhao, Sibo Wen, Ziqi Hu, Taotao Tao, Yizhi Jiang, Ke Chen
{"title":"The dynamic mechanical properties of EPDM rubber based on the fractional derivative constitutive model","authors":"Rongguo Zhao,&nbsp;Sibo Wen,&nbsp;Ziqi Hu,&nbsp;Taotao Tao,&nbsp;Yizhi Jiang,&nbsp;Ke Chen","doi":"10.1007/s00397-025-01496-w","DOIUrl":"10.1007/s00397-025-01496-w","url":null,"abstract":"<div><p>In this paper, the temperature and frequency sweep experiments for ethylene propylene diene monomer (EPDM) samples are performed, and the master curves of the dynamic mechanical properties of EPDM rubber are built by using time–temperature superposition principle (TTSP). It shows that the EPDM rubber exhibits temperature- and frequency-dependent properties, and its temperature <i>T</i><sub>α</sub> at which the dissipation is maximum for a given frequency increases with the frequency. The constructed master curve can characterize the dynamic mechanical properties of EPDM rubber covering 12 decades on the angular frequency scale. Then, the fractional derivative Kelvin (FDK) model and the fractional derivative Zener (FDZ) model are introduced, and a fractional derivative five-element (FDFE) model is proposed. The master curves of EPDM rubber are fitted by using these models. The results indicate that compared with the FDK and FDZ models, the FDFE model has more discrete relaxation times due to its multiple parallel branches, which enables it to accurately describe the dynamic mechanical behavior of EPDM rubber and well characterize the asymmetric characteristics of the loss factor curve. Finally, the influences of parameters in the FDFE model on the dynamic mechanical performance curves of polymers are investigated. It suggests that both fractional parameters and relaxation times control the dynamic response mechanisms, and the proposed FDFE model has a potential broad applicability in characterizing the dynamic mechanical properties of polymers. </p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 6-7","pages":"273 - 290"},"PeriodicalIF":3.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145472","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}
引用次数: 0
Dampened elasticity of gels and the Deborah function 凝胶的阻尼弹性及底波拉函数
IF 3 3区 工程技术
Rheologica Acta Pub Date : 2025-05-06 DOI: 10.1007/s00397-025-01489-9
H. Henning Winter
{"title":"Dampened elasticity of gels and the Deborah function","authors":"H. Henning Winter","doi":"10.1007/s00397-025-01489-9","DOIUrl":"10.1007/s00397-025-01489-9","url":null,"abstract":"<div><p>The interaction between the slow and fast eigenmodes of a viscoelastic material gives rise to “dampened elasticity,” playing a crucial role in both technical applications and natural processes. This phenomenon occurs during the flow of a viscoelastic liquid or the deformation of a viscoelastic solid, as slow eigenmodes work to elastically restore the material’s previous shapes, while fast relaxation modes resist any such elastic recovery by attempting to preserve the material’s current shape. In this way, fast modes create a viscous background that dampens elastic recovery. Elastic-dominated and viscous-dominated stress components act across a sequence of process times, 0 &lt; <i>s</i> &lt; ∞, when probing eigenmodes with a spectrum of relaxation times spanning 0 &lt; <i>τ</i> &lt; <i>τ</i><sub>max</sub>. Classification of an eigenmode as fast or slow depends on the respective value of the Deborah function, <i>D</i>(<i>τ</i>;<i>s</i>) = <i>τ</i>/<i>s</i>, a key parameter introduced here. The critical value <i>D</i> = 1 separates the eigenmodes into two groups, those dominated by elasticity (<i>D</i> &gt; 1) and those dominated by viscosity (<i>D</i> &lt; 1). The resulting ratio of elastic to viscous stress, referred to as elastic-to-viscous ratio EVR, defines the viscoelastic state of soft matter under specific flow or strain conditions. The EVR(<b><i>x</i></b>,<i>t</i>) can vary with position (<b><i>x</i></b>) and/or evolve over time. Additionally, the damping potential, <i>P</i><sub><i>d</i></sub>, defines the ratio of transient to permanent elasticity in solids. Illustrating examples involve gels and the process of gelation with its characteristic evolution of relaxation times. The distinction between elasticity-dominated and viscosity-dominated stress is equally applicable to linear and non-linear viscoelasticity.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 4-5","pages":"209 - 223"},"PeriodicalIF":3.0,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162514","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}
引用次数: 0
Powders and cohesive granular media: a rheological perspective 粉末和粘性颗粒介质:流变学观点
IF 3 3区 工程技术
Rheologica Acta Pub Date : 2025-04-09 DOI: 10.1007/s00397-025-01490-2
Olivier Pouliquen
{"title":"Powders and cohesive granular media: a rheological perspective","authors":"Olivier Pouliquen","doi":"10.1007/s00397-025-01490-2","DOIUrl":"10.1007/s00397-025-01490-2","url":null,"abstract":"<div><p>This paper provides a rapid overview of the mechanics of cohesive granular materials and powders, with a particular focus on the development of constitutive equations for the steady flowing regime. We begin by reviewing the various sources of adhesion between particles, before exploring the onset of flow in cohesive materials. While yield conditions are central to many characterization methods, they provide limited insight into flow behavior. We then discuss recent studies on the flow of cohesive granular materials, emphasizing the development of constitutive equations. A direct comparison of results from DEM simulations across different studies highlights the importance of the interaction model details but reveals key insights into the relevance of different dimensionless numbers, paving the way for a more comprehensive rheological description of powders.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 4-5","pages":"195 - 207"},"PeriodicalIF":3.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163730","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}
引用次数: 0
Microstructure patterning induced by magnetic field in biopolymer composites: correlation between rheological properties and in situ optical observation 磁场在生物聚合物复合材料中诱导的微结构图案化:流变特性与原位光学观测之间的相关性
IF 2.3 3区 工程技术
Rheologica Acta Pub Date : 2025-04-05 DOI: 10.1007/s00397-025-01487-x
Alberto Varela-Feijoo, Williams Brett, Souad Ammar-Merah, Alain Ponton
{"title":"Microstructure patterning induced by magnetic field in biopolymer composites: correlation between rheological properties and in situ optical observation","authors":"Alberto Varela-Feijoo,&nbsp;Williams Brett,&nbsp;Souad Ammar-Merah,&nbsp;Alain Ponton","doi":"10.1007/s00397-025-01487-x","DOIUrl":"10.1007/s00397-025-01487-x","url":null,"abstract":"<div><p>This paper reports the development of innovative magnetic-sensitive biopolymer composites and the subsequent investigation of their rheological properties in relation to in situ optical studies of microstructures. Positively charged iron oxide magnetic nanoparticles (IONP) that had been chemically functionalised by grafting 3-Aminopropylphosphonic acid molecules onto their surfaces were mixed in an entangled aqueous solution of sodium alginate chains. Steady shear flow and viscoelastic measurements were then performed on the resulting nanocomposites using a home-made magneto-opto-rheological device. The increase of low shear viscosity and the linear viscoelastic moduli as the magnitude of the magnetic field increased was clearly demonstrated. This is explained by electrostatic interactions between -NH<sub>3</sub><sup>+</sup> and -COO<sup>−</sup> groups at the surface of IONP and polymer chains, respectively. The resulting microstructure, which depends on both the shear rate and the magnetic field amplitude, was observed for the first time using in situ optical microscopy and deeply analysed.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 2-3","pages":"151 - 165"},"PeriodicalIF":2.3,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826609","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}
引用次数: 0
Fifty shades of yield stress fluids: rheological challenges and engineering perspectives 五十种屈服应力流体:流变学挑战和工程观点
IF 3 3区 工程技术
Rheologica Acta Pub Date : 2025-04-01 DOI: 10.1007/s00397-025-01488-w
P. Coussot
{"title":"Fifty shades of yield stress fluids: rheological challenges and engineering perspectives","authors":"P. Coussot","doi":"10.1007/s00397-025-01488-w","DOIUrl":"10.1007/s00397-025-01488-w","url":null,"abstract":"<div><p>While they were still marginal around 30 years ago and even the very existence of the yield stress was still under debate, research work involving yield stress fluids has exploded over the last 20 years in rheology and physics, even to the point of sometimes appearing hackneyed. Yield stress fluids are now fully recognized as a specific state of matter by physicists and widely studied for this reason. They are also used for their remarkable mechanical behavior in a rapidly growing range of applications, notably in additive manufacturing or 3D printing in bioengineering, civil engineering, food processing, etc. This review first discusses the areas in which a sufficient knowledge might be considered acquired to be used in yield stress fluid engineering. This in particular includes the characterization of materials, through practical tests or sophisticated approaches, the use of simplistic constitutive equations or more complex models including various subtleties of behavior in view of flow simulations, a basic rheophysical framework for predicting the behavior of yielding dispersions or aggregated systems, but also for the widespread practical case of suspensions in yield stress fluids. However, there also appear large areas of major impact for which a comprehensive knowledge seems still lacking. This is in particular the case of: a relevant 3D formulation of the constitutive equation to describe the complex flows encountered in numerous applications, the physical and mechanical characteristics of the solid–liquid transition, the characterization and description of thixotropy, the transition to pasty materials, at the very frontier of “pure” solids.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 4-5","pages":"167 - 193"},"PeriodicalIF":3.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160706","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}
引用次数: 0
Phenomenological model for rheological characterization of magnetorheological fluids 磁流变流体流变特性的现象学模型
IF 2.3 3区 工程技术
Rheologica Acta Pub Date : 2025-03-22 DOI: 10.1007/s00397-025-01486-y
Hiren Prajapati, Absar Lakdawala
{"title":"Phenomenological model for rheological characterization of magnetorheological fluids","authors":"Hiren Prajapati,&nbsp;Absar Lakdawala","doi":"10.1007/s00397-025-01486-y","DOIUrl":"10.1007/s00397-025-01486-y","url":null,"abstract":"<div><p>Magnetorheological fluid converts into semisolid under the action of the magnetic field. Yield stress is the minimum external stress required to initiate the flow in the presence of a magnetic field. Predicting yield stress is vital for analyzing the performance of any MR application. Various yield stress models are available in the literature. However, they are valid for a particular composition of MRF or magnetic field strength range. Here, the yield stress model is derived using magnetostatics principles. Further, the characteristic magnetic field strength is used to introduce the non-linear magnetization of MRF. The Herschel-Bulkley model is used to present the post-yield nature of MRF flow. The constants of the proposed model are determined using the gradual reduced gradient method. They can predict shear stress with ± 10% accuracy irrespective of magnetic field strength zone.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 2-3","pages":"133 - 150"},"PeriodicalIF":2.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826608","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}
引用次数: 0
Does the nonuniqueness of the discrete relaxation spectrum really matter? 离散松弛谱的非唯一性真的重要吗?
IF 2.3 3区 工程技术
Rheologica Acta Pub Date : 2025-02-27 DOI: 10.1007/s00397-025-01485-z
Sachin Shanbhag
{"title":"Does the nonuniqueness of the discrete relaxation spectrum really matter?","authors":"Sachin Shanbhag","doi":"10.1007/s00397-025-01485-z","DOIUrl":"10.1007/s00397-025-01485-z","url":null,"abstract":"<div><p>Unlike the continuous relaxation spectrum (CRS), discrete relaxation spectra (DRS) are nonunique. This means that the linear viscoelastic response of a material can be described by two or more distinct DRS. Constraints like parsimony and consistency help us to infer meaningful DRS, but are not sufficient to induce uniqueness as it is an inherent property of discretization. Using parsimonious DRS from two different programs (DISCRETE and pyReSpect) on data drawn from experiments, simulations, and theory, we demonstrate that nonuniqueness does not hinder the two most common applications of relaxation spectra, viz. characterization and interconversion. Furthermore, information for reconstructing the CRS underlying the data is embedded in the DRS. Therefore, for most practical considerations, we find that the nonuniqueness of the DRS does not matter.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 2-3","pages":"107 - 116"},"PeriodicalIF":2.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826591","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}
引用次数: 0
Numerical modeling of fluid displacement in Hele-Shaw cells: a gap-averaged approach for power-law and Newtonian fluids Hele-Shaw细胞中流体位移的数值模拟:幂律和牛顿流体的间隙平均方法
IF 2.3 3区 工程技术
Rheologica Acta Pub Date : 2025-02-18 DOI: 10.1007/s00397-025-01484-0
Yao Zhang, Knut Erik Teigen Giljarhus, Hans Joakim Skadsem, Benjamin Barrouillet
{"title":"Numerical modeling of fluid displacement in Hele-Shaw cells: a gap-averaged approach for power-law and Newtonian fluids","authors":"Yao Zhang,&nbsp;Knut Erik Teigen Giljarhus,&nbsp;Hans Joakim Skadsem,&nbsp;Benjamin Barrouillet","doi":"10.1007/s00397-025-01484-0","DOIUrl":"10.1007/s00397-025-01484-0","url":null,"abstract":"<div><p>This work presents a physics-based two-dimensional model for simulating displacement flows of power-law fluids in Hele-Shaw cells. The model is derived by approximating fully developed velocity profiles across the gap-wise direction and averaging the mass and momentum conservation equations, resulting in a two-dimensional formulation that efficiently captures complex fluid dynamics. Implemented in OpenFOAM, this approach achieves computational speeds over 200 times faster than comparable 3D simulations, while preserving the accuracy of displacement dynamics. Validated against 3D DNS results and experimental data, this 2D model accurately replicates observed flow phenomena. Simulations of over 70 cases examined the effect of the ratio of friction pressure gradients (RFG) between fluid pairs on interface stability. Results show that RFGs below unity maintain a flat interface, while higher values induce viscous fingering. In cases with RFG closer to unity, a longer duct or extended displacement time is required for significant finger growth.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"64 2-3","pages":"117 - 132"},"PeriodicalIF":2.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-025-01484-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826606","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}
引用次数: 0
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