نتایج جستجو برای: anionic polyelectrolyte

تعداد نتایج: 14779  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2002
René Messina Christian Holm Kurt Kremer

We report results from a molecular dynamics simulation on the conformations of a long flexible polyelectrolyte complexed to a charged sphere, both negatively charged, in the presence of neutralizing counterions in the strong Coulomb coupling regime. The structure of this complex is very sensitive to the charge density of the polyelectrolyte. For a fully charged polyelectrolyte the polymer forms...

Journal: :Cytometry. Part A : the journal of the International Society for Analytical Cytology 2015
Karin Magnusson Hanna Appelqvist Artur Cieślar-Pobuda Jens Wigenius Thommie Karlsson Marek J Łos Bertil Kågedal Jon Jonasson K Peter R Nilsson

Molecular probes for imaging of live cells are of great interest for studying biological and pathological processes. The anionic luminescent conjugated polythiophene (LCP) polythiophene acetic acid (PTAA), has previously been used for vital staining of cultured fibroblasts as well as transformed cells with results indicating differential staining due to cell phenotype. Herein, we investigated t...

Journal: :Lab on a chip 2014
Gilad Kaufman Rostislav Boltyanskiy Siamak Nejati Abdou R Thiam Michael Loewenberg Eric R Dufresne Chinedum O Osuji

Common methods for fabrication of polyelectrolyte microcapsules rely on a multi-step process. We propose a single-step approach to generate polyelectrolyte microcapsules with 1-2 μm shells based on polyelectrolyte complexation across a water/oil droplet interface and study the effect of parameters controlling the polyelectrolyte complexation on shell thickness.

2014
Saugandhika Minnikanti Aveek Gangopadhyay Darwin R. Reyes

The formation of polyelectrolyte multilayers (PEMs) for the first time, two decades ago, demonstrating the assembly on charged substrates in a very simple and efficient way, has proven to be a reliable method to obtain structures tunable at the nanometer scale. Much effort has been put into the assembly of these structures for their use in biological applications. A number of these efforts have...

Journal: :Micro 2022

Novel biohybrid homo-polyelectrolyte-based nanocarriers were formed by the complexation of insulin (INS) with a biocompatible and cationic polyelectrolyte, namely, poly(vinyl benzyl trimethylammonium chloride) (PVBTMAC). According to light-scattering techniques, hydrophilic PVBTMAC homo-polyelectrolyte forms single chains in aqueous media. The resulting PVBTMAC/INS via electrostatic co-assembly...

Journal: :iranian journal of pharmaceutical sciences 0
ali akbar saboury institute of biochemistry and biophysics, tehran university, tehran, iran saeed rezaei-zarchi institute of biochemistry and biophysics, tehran university, tehran, iran department of biology, payam-e-noor university, yazd, iran aisha javed department of biochemistry, university of agriculture, faisalabad, pakistan isatis biotechnology company, yazd science and technology park, yazd, iran

nafion is a perfluorinated anionic polyelectrolyte. the increasing popularity of nafion for the fabrication of redox polymer modified electrodes in recent years arises from easy fabrication, good electrical conductivity and high partition coefficients of many redox compounds in nafion. to investigate the production of nano-compositions by mixing electron transfer material and nafion polymer for...

Journal: :The Journal of chemical physics 2005
Rudi Podgornik Wayne M Saslow

We investigate polyelectrolyte bridging interactions mediated by charged, flexible, polyelectrolyte chains between fixed cylindrical macroions of opposite charge in a two-dimensional hexagonal crystalline array. We show that in the asymptotic regime of small macroion density, the polyelectrolyte-mediated attraction is long range, falling off approximately linearly with the macroion array densit...

Journal: :Nanotechnology, science and applications 2009
Bingbing Jiang John B Barnett Bingyun Li

There has been considerable interest in polyelectrolyte multilayer nanofilms, which have a variety of applications ranging from optical and electrochemical materials to biomedical devices. Polyelectrolyte multilayer nanofilms are constructed from aqueous solutions using electrostatic layer-by-layer self-assembly of oppositely-charged polyelectrolytes on a solid substrate. Multifunctional polyel...

ژورنال: علوم آب و خاک 2014
اسمعیلی دستجردی پور, عاطفه, سرچشمه پور, مهدی, فرپور, محمد هادی,

Organic substances produced by cyanobacteria and some polymeric compounds play a role in soil aggregation and increase soil structure stability in sandy soils. Effects of biological soil crusts and some polymeric compounds on some properties of a sandy soil were investigated in this research. Inoculation of three cyanobacterial treatments (Nostoc sp., Phormidium sp. and their combination) and f...

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