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The observation of neuron-like behaviour in bacteria, such as the occurrence of electric spiking and extended bioelectric signalling, points to the role of membrane dynamics in prokaryotes. Electrophysiology of bacteria, however, has been…

Biological Physics · Physics 2021-04-02 Giuseppe Maria Paternò , Gaia Bondelli , Guglielmo Lanzani

Despite recent breakthroughs in understanding how protein sequence relates to structure and function, considerably less attention has been paid to the general features of protein surfaces beyond those regions involved in binding and…

Biomolecules · Quantitative Biology 2024-07-26 John M. McBride , Aleksei Koshevarnikov , Marta Siek , Bartosz A. Grzybowski , Tsvi Tlusty

Surface modification of polymeric biomaterials using plasma has emerged as an effective strategy to optimize the cell-material interface without compromising the structural properties of the material. This work presents a critical review of…

Plasma Physics · Physics 2025-04-08 Jairo Rondøn , Angel Gonzalez-Lizardo

We introduce a novel concept, the minimal molecular surface (MMS), as a new paradigm for the theoretical modeling of biomolecule-solvent interfaces. When a less polar macromolecule is immersed in a polar environment, the surface free energy…

Biomolecules · Quantitative Biology 2007-05-23 P. W. Bates , G. W. Wei , Shan Zhao

Biofilms are complex, self-organized consortia of microorganisms that produce a functional, protective matrix of biomolecules. Physically, the structure of a biofilm can be described as an entangled polymer network which grows and changes…

Biological Physics · Physics 2016-11-08 Marco G. Mazza

Microswimmers such as E. Coli bacteria accumulate and exhibit an intriguing dynamics near walls, governed by hydrodynamic and steric interactions. Insight into the underlying mechanisms and predominant interactions demand a detailed…

Soft Condensed Matter · Physics 2020-07-03 S. Mahdiyeh Mousavi , Gerhard Gompper , Roland G. Winkler

The ordering of a multilayer consisting of DSPC bilayers on a silica sol substrate is studied within the model-independent approach to the reconstruction of profiles of the electron density from X-ray reflectometry data. It is found that…

Simplified silica (Zeosil 1165 MP) and SBR (140k carrying silanol end-groups) nanocomposites have been formulated by mixing of a reduced number of ingredients with respect to industrial applications. The thermo-mechanical history of the…

We consider fermionic polar molecules in a bilayer geometry where they are oriented perpendicularly to the layers, which permits both low inelastic losses and superfluid pairing. The dipole-dipole interaction between molecules of different…

Quantum Gases · Physics 2010-11-29 A. Pikovski , M. Klawunn , G. V. Shlyapnikov , L. Santos

We consider the problem of extending germs of plane holomorphic foliations to foliations of compact surfaces. We show that the germs that become regular after a single blow up and admit meromorphic first integrals can be extended, after…

Complex Variables · Mathematics 2014-07-31 Gabriel Calsamiglia , Paulo Sad

We present a morphological analysis of atom probe data of nanoscale microstructural features, using methods developed by the astrophysics community to describe the shape of superclusters of galaxies. We describe second-phase regions using…

Materials Science · Physics 2020-01-30 Daniel R Mason , Andrew J London

A Rapid and cost-effective method for detecting bacterial cells on surfaces is critical to protect public health from various aspects, including food safety, clinical hygiene, and pharmacy quality. Herein, we first established an optical…

Quantitative Methods · Quantitative Biology 2024-03-13 Yuzhen Zhang , Zili Gao , Lili He

We report on self-assembly, clustering, and conformational phases of peptides on inorganic semiconductor surfaces. The peptide-covered surface fraction can differ by a factor of 25, depending mainly on surface and peptide polarity. Low…

Soft Condensed Matter · Physics 2009-11-13 Karsten Goede , Michael Bachmann , Wolfhard Janke , Marius Grundmann

Designable media can control properties of nanocomposite materials by spatially organizing nanoparticles. Here we theoretically study particle organization by ultrathin polymer films of grafted chains (``brushes''). Polymer-soluble…

Soft Condensed Matter · Physics 2009-11-07 Jaeup U. Kim , Ben O'Shaughnessy

This note is about a type of quantitative density of closed geodesics on closed hyperbolic surfaces. The main results are upper bounds on the length of the shortest closed geodesic that $\varepsilon$-fills the surface.

Geometric Topology · Mathematics 2017-05-31 Ara Basmajian , Hugo Parlier , Juan Souto

Bacterial biofilms are usually assumed to originate from individual cells deposited on a surface. However, many biofilm-forming bacteria tend to aggregate in the planktonic phase so that it is possible that many natural and infectious…

Understanding dynamic and complex interaction of biological membranes with extracellular matrices plays a crucial role in controlling a variety of cell behavior and functions, from cell adhesion and growth to signaling and differentiation.…

Soft Condensed Matter · Physics 2022-07-28 Selcan Karaz , Mertcan Han , Gizem Akay , Asim Onal , Sedat Nizamoglu , Seda Kizilel , Erkan Senses

Wrought by nature's wondrous hand, surface topographies are discovered on all length scales in living creatures and serve a variety of functions. Inspired by floral striations, here we developed a scalable means of fabricating…

Soft Condensed Matter · Physics 2019-10-29 Guang Chu , Andrea Camposeo , Rita Vilensky , Gleb Vasilyev , Patrick Martin , Dario Pisignano , Eyal Zussman

In a recent publication, we have highlighted the potential of phosphonic acid terminated PEG oligomers to functionalize strong UV absorption cerium oxide nanoparticles[1], which yield suspensions that are stable in aqueous or organic…

Materials Science · Physics 2013-05-07 L. Qi , J. Fresnais , P. Muller , O. Theodoly , J. -F. Berret , J. -P. Chapel

Biofilms are communities of bacteria that exhibit a multitude of multiscale biomechanical behaviors. Recent experimental advances have lead to characterizations of these behaviors in terms of measurements of the viscoelastic moduli of…

Cell Behavior · Quantitative Biology 2017-07-19 Jay A. Stotsky , Vanja Dukic , David M. Bortz