Reply to the ‘Comment on “A symmetrical method to obtain shear moduli from microrheology”’ by M. Tassieri, Soft Matter, 2018, 14, DOI: 10.1039/C8SM00806J

Soft Matter ◽  
2018 ◽  
Vol 14 (42) ◽  
pp. 8671-8672
Author(s):  
Kengo Nishi ◽  
Maria L. Kilfoil ◽  
Christoph F. Schmidt ◽  
F. C. MacKintosh
Keyword(s):  
Soft Matter ◽  
Recent Article ◽  
Shear Moduli ◽  
Symmetrical Method

We provide a response to the comments by M. Tassieri on our recent article in Soft Matter.

scholarly journals Comment on “A symmetrical method to obtain shear moduli from microrheology” by K. Nishi, M. L. Kilfoil, C. F. Schmidt, and F. C. MacKintosh, Soft Matter, 2018, 14, 3716

Soft Matter ◽  
2018 ◽  
Vol 14 (42) ◽  
pp. 8666-8670 ◽  
Author(s):  
Manlio Tassieri
Keyword(s):  
Soft Matter ◽  
Shear Moduli ◽  
Symmetrical Method

We clarify some issues that were raised by an article that appeared in this journal (K. Nishi, M. L. Kilfoil, C. F. Schmidt, and F. C. MacKintosh, Soft Matter, 2018, 14, 3716).

Reply to the ‘Comment on “Relating side chain organization of PNIPAm with its conformation in aqueous methanol”’ by N. van der Vegt and F. Rodriguez-Ropero, Soft Matter, 2017, 13, DOI: 10.1039/C6SM02139E

Soft Matter ◽  
2017 ◽  
Vol 13 (12) ◽  
pp. 2292-2294 ◽  
Author(s):  
Debashish Mukherji ◽  
Manfred Wagner ◽  
Mark D. Watson ◽  
Svenja Winzen ◽  
Tiago E. de Oliveira ◽  
...  
Keyword(s):  
Soft Matter ◽  
Recent Article ◽  
Side Chain ◽  
Aqueous Methanol ◽  
Chain Organization

We provide a reply to comments by N. van der Vegt and F. Rodriguez-Ropero on our recent article in Soft Matter.

scholarly journals Predictions of the shear modulus of cheese, a soft matter approach

2019 ◽  
Vol 29 (1) ◽  
pp. 58-68 ◽  
Author(s):  
Graeme Gillies
Keyword(s):  
Shear Modulus ◽  
Soft Matter ◽  
Volume Fraction ◽  
Quantitative Model ◽  
Nano Particles ◽  
Core Shell ◽  
Two Dimensional ◽  
Shear Moduli ◽  
Numerical Predictions ◽  
The Many

Abstract The rheological and structural properties of cheese govern many physical processes associated with cheese such as slumping, slicing and melting. To date there is no quantitative model that predicts shear modulus, viscosity or any other rheological property across the entire range of cheeses; only empirical fits that interpolate existing data. A lack of a comprehensive model is in part due to the many variables that can affect rheology such as salt, pH, calcium levels, protein to moisture ratio, age and temperature. By modelling the casein matrix as a series core-shell nano particles assembled from calcium and protein these variables can be reduced onto a simpler two-dimensional format consisting of attraction and equivalent hard sphere volume fraction. Approximating the interaction between core-shell nano particles with a Mie potential enables numerical predictions of shear moduli. More qualitatively, this two-dimensional picture can be applied quite broadly and captures the viscoelastic behaviour of soft and hard cheeses as well as their melting phenomena.

scholarly journals A symmetrical method to obtain shear moduli from microrheology

Soft Matter ◽  
2018 ◽  
Vol 14 (19) ◽  
pp. 3716-3723 ◽  
Author(s):  
Kengo Nishi ◽  
Maria L. Kilfoil ◽  
Christoph F. Schmidt ◽  
F. C. MacKintosh
Keyword(s):  
Elastic Moduli ◽  
Direct Determination ◽  
Analysis Method ◽  
Shear Moduli ◽  
Mean Squared Displacement ◽  
The Mean ◽  
Symmetrical Method ◽  
Probe Particles

Passive microrheology deduces shear elastic moduli from thermally fluctuating motion of probe particles. We introduce and test an analysis method for direct determination of these moduli from the mean-squared displacement of a probe.

scholarly journals Diffusing wave microrheology of highly scattering concentrated monodisperse emulsions

2019 ◽  
Vol 116 (16) ◽  
pp. 7766-7771 ◽  
Author(s):  
Ha Seong Kim ◽  
Nesrin Şenbil ◽  
Chi Zhang ◽  
Frank Scheffold ◽  
Thomas G. Mason
Keyword(s):  
Soft Matter ◽  
Volume Fraction ◽  
Low Frequency ◽  
Mean Free Path ◽  
Quantitative Agreement ◽  
Einstein Relation ◽  
Quasi Equilibrium ◽  
Shear Moduli ◽  
Wide Range ◽  
Collective Scattering

Motivated by improvements in diffusing wave spectroscopy (DWS) for nonergodic, highly optically scattering soft matter and by cursory treatment of collective scattering effects in prior DWS microrheology experiments, we investigate the low-frequency plateau elastic shear moduli Gp′ of concentrated, monodisperse, disordered oil-in-water emulsions as droplets jam. In such experiments, the droplets play dual roles both as optical probes and as the jammed objects that impart shear elasticity. Here, we demonstrate that collective scattering significantly affects DWS mean-square displacements (MSDs) in dense colloidal emulsions. By measuring and analyzing the scattering mean free path as a function of droplet volume fraction φ, we obtain a φ-dependent average structure factor. We use this to correct DWS MSDs by up to a factor of 4 and then calculate Gp′ predicted by the generalized Stokes–Einstein relation. We show that DWS-microrheological Gp′(φ) agrees well with mechanically measured Gp′(φ) over about three orders of magnitude when droplets are jammed but only weakly deformed. Moreover, both of these measurements are consistent with predictions of an entropic–electrostatic–interfacial (EEI) model, based on quasi-equilibrium free-energy minimization of disordered, screened-charge–stabilized, deformable droplets, which accurately describes prior mechanical measurements of Gp′(φ) made on similar disordered monodisperse emulsions over a wide range of droplet radii and φ. This very good quantitative agreement between DWS microrheology, mechanical rheometry, and the EEI model provides a comprehensive and self-consistent view of weakly jammed emulsions. Extensions of this approach may improve DWS microrheology on other systems of dense, jammed colloids that are highly scattering.

Reply to the ‘Comment on “Cholesterol Solubility Limit in Lipid Membranes probed by Small Angle Neutron Scattering and MD simulations”’ by R. Epand, Soft Matter, 2015, 11, DOI: 10.1039/C4SM02819H

Soft Matter ◽  
2015 ◽  
Vol 11 (27) ◽  
pp. 5582-5584 ◽  
Author(s):  
Natalie Krzyzanowski ◽  
Lionel Porcar ◽  
Sumit Garg ◽  
Paul Butler ◽  
Francisco Castro-Roman ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Lipid Membranes ◽  
Small Angle Neutron Scattering ◽  
Soft Matter ◽  
Recent Article ◽  
Md Simulations ◽  
Solubility Limit ◽  
Cholesterol Solubility

In the comment by Epand et al. on our recent article, it is stated that the term “cholesterol solubility limit” is misused.

Allosteric regulation of GPCR Rhodopsin by soft matter

2020 ◽  
Author(s):  
Nipuna Weerasinghe ◽  
Steven Fried ◽  
Anna Eitel ◽  
Andrey Struts ◽  
Suchithranga Perera ◽  
...  
Keyword(s):  
Soft Matter ◽  
Allosteric Regulation

Maclaurin on Occasionalism: A Reply to Ablondi

2016 ◽  
Vol 14 (1) ◽  
pp. 125-135
Author(s):  
Patrick J. Connolly
Keyword(s):  
Eighteenth Century ◽  
Recent Article ◽  
Gravitational Attraction ◽  
Matter Theory ◽  
Key Features ◽  
Short Essay ◽  
The Way

In a recent article Fred Ablondi compares the different approaches to occasionalism put forward by two eighteenth-century Newtonians, Colin Maclaurin and Andrew Baxter. The goal of this short essay is to respond to Ablondi by clarifying some key features of Maclaurin's views on occasionalism and the cause of gravitational attraction. In particular, I explore Maclaurin's matter theory, his views on the explanatory limits of mechanism, and his appeals to the authority of Newton. This leads to a clearer picture of the way in which Maclaurin understood gravitational attraction and the workings of nature.

Mathematical Model of the Effective Properties of a Fiber Reinforced Composite with a Linearly Graded Transition Zone

2010 ◽  
Vol 38 (4) ◽  
pp. 286-307
Author(s):  
Carey F. Childers
Keyword(s):  
Mathematical Model ◽  
Transition Zone ◽  
Effective Properties ◽  
Local Stress ◽  
Stress And Strain ◽  
Fiber Reinforced ◽  
Strain Fields ◽  
Shear Moduli ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Abstract Tires are fabricated using single ply fiber reinforced composite materials, which consist of a set of aligned stiff fibers of steel material embedded in a softer matrix of rubber material. The main goal is to develop a mathematical model to determine the local stress and strain fields for this isotropic fiber and matrix separated by a linearly graded transition zone. This model will then yield expressions for the internal stress and strain fields surrounding a single fiber. The fields will be obtained when radial, axial, and shear loads are applied. The composite is then homogenized to determine its effective mechanical properties—elastic moduli, Poisson ratios, and shear moduli. The model allows for analysis of how composites interact in order to design composites which gain full advantage of their properties.

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