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Related papers: Phenol release from pNIPAM hydrogels: Scaling Mole…

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The transport coefficients of dense polymeric fluids are approximately calculated from the microscopic intermolecular forces. The following finite molecular weight effects are discussed within the Polymer-Mode-Coupling theory (PMC) and…

Condensed Matter · Physics 2009-10-30 Matthias Fuchs , Kenneth S. Schweizer

The authors use ab initio molecular dynamics and the density functional theory+U (DFT+U) method to compute the hydration environment of the manganese ion in manganese (II) and manganese (III) porphines (MnP) dispersed in liquid water. These…

Statistical Mechanics · Physics 2007-05-23 Kevin Leung , Craig J. Medforth

Droplet interface bilayers are a convenient model system to study the physio-chemical properties of phospholipid bilayers, the major component of the cell membrane. The mechanical response of these bilayers to various external mechanical…

Biological Physics · Physics 2021-02-08 Yaoqi Huang , Vineeth Chandran Suja , Javier Tajuelo , Gerald G. Fuller

In this work we monitor the catalytic mechanism of P-glycoprotein (Pgp) using single-molecule fluorescence resonance energy transfer (FRET). Pgp, a member of the ATP binding cassette family of transport proteins, is found in the plasma…

Biomolecules · Quantitative Biology 2015-05-27 Stefan Ernst , Brandy Verhalen , Nawid Zarrabi , Stephan Wilkens , Michael Boersch

The dynamics and spectroscopy of N-methyl-acetamide (NMA) and trialanine in solution is characterized from molecular dynamics (MD) simulations using different energy functions, including a conventional point charge (PC)-based force field,…

Biological Physics · Physics 2021-06-21 Padmabati Mondal , Pierre-André Cazade , Akshaya K. Das , Tristan Bereau , Markus Meuwly

A detailed model for the calculation of beta decay rates of the $fp$ shell nuclei for situations prevailing in pre-supernova and collapse phases of evolution of the core of massive stars leading to supernova explosion has been extended for…

Nuclear Theory · Physics 2008-11-26 K. Kar , S. Chakravarti , A. Ray , S. Sarkar

Conventional heat carrier liquids have demonstrated remarkable enhancement in heat and mass transfer when nanoparticles were suspended in them. These liquid-nanoparticle suspensions are now known as Nanofluids. However the relationship…

The Targeted Free Energy Perturbation (TFEP) method aims to overcome the time-consuming and computer-intensive stratification process of standard methods for estimating the free energy difference between two states. To achieve this, TFEP…

Chemical Physics · Physics 2023-02-24 Soo Jung Lee , Amr H. Mahmoud , Markus A. Lill

The dynamics of ultrafast energy transfer to water clusters and to bulk water by a highly intense, sub-cycle THz pulse of duration $\approx$~150~fs is investigated in the context of force-field molecular dynamics simulations. We focus our…

Atomic and Molecular Clusters · Physics 2016-07-11 Pankaj Kr. Mishra , Oriol Vendrell , Robin Santra

Let Delta F be the free energy difference between two equilibrium states of a system. An established method of numerically computing Delta F involves a single, long ``switching simulation'', during which the system is driven reversibly from…

Statistical Mechanics · Physics 2009-11-07 D. A. Hendrix , C. Jarzynski

The peculiar linear temperature-dependent swelling of core-shell microgels has been conjectured to be linked to the core-shell architecture combining materials of different transition temperatures. Here the structure of pNIPMAM-core and…

Monte Carlo simulations are used to study the translocation of a polymer into and out of a ellipsoidal cavity through a narrow pore. We measure the polymer free energy F as a function of a translocation coordinate, s, defined to be the…

Soft Condensed Matter · Physics 2015-05-20 James M. Polson

Glassy dynamics and charge transport are studied for the polymeric Ionic Liquid (PIL) poly(tris(2-(2-methoxyethoxy)ethyl)ammonium acryloxypropylsulfonate) (PAAPS) with varying molecular weight (9700, 44200, 51600 and 99500 g per mol) by…

Soft Condensed Matter · Physics 2018-10-10 Falk Frenzel , Ryan Guterman , A. Markus Anton , Jiayin Yuan , Friedrich Kremer

Interpenetrated polymer network microgels, composed of crosslinked networks of poly(N-isopropylacrylamide) and polyacrylic acid (PAAc), have been investigated through rheological measurements at four different amounts of polyacrylic acid.…

Several dissociated and two non-dissociated adsorption structures of the phenol molecule on the Si(001)-(2 \times 1) surface are studied using density functional theory with various exchange and correlation functionals. The relaxed…

Computational Physics · Physics 2015-05-19 Karen Johnston , Andris Gulans , Tuukka Verho , Martti J. Puska

We study the dynamics of hydration water/protein association in folded proteins, using lysozyme and myoglobin as examples. Extensive molecular dynamics simulations are performed to identify underlying mechanisms of the dynamical transition…

Soft Condensed Matter · Physics 2015-05-13 J. Servantie , C. Atilgan , A. R. Atilgan

An important step in a phospholipid membrane pore formation by melittin antimicrobial peptide is a reorientation of the peptide from a surface into a transmembrane conformation. In this work we perform umbrella sampling simulations to…

Biological Physics · Physics 2013-06-12 Sheeba J. Irudayam , Tobias Pobandt , Max L. Berkowitz

The ability to control by physical properties of the thermoresponsive polymer of PNIPAM by magnetocaloric effect was demonstrated by in-situ experiments on PNIPAM/FeRh smart composite. The concept of drug release loaded in smart composite…

This is the documentation for dynamic X-ray tomography measurements of a gel phantom diffused with potassium iodide contrast agent. The measured data and additional materials are available at http://www.fips.fi/dataset.php and Zenodo…

Image and Video Processing · Electrical Eng. & Systems 2023-05-01 Tommi Heikkilä , Hanna Help , Alexander Meaney