نتایج جستجو برای: polyelectrolyte phospholipid

تعداد نتایج: 23705  

Journal: :avicenna journal of medical biochemistry 0
heidar tavilani urology and nephrology research center, hamadan university of medical sciences, hamadan ir iran; urology and nephrology research center, hamadan university of medical sciences, hamadan ir iran. tel: +98-8138381590, fax: +98-8138380130 akram vatannejad student’s scientific research center, tehran university of medical sciences, tehran, ir iran maryam akbarzadeh department of biochemistry and clinical laboratories, faculty of medicine, tabriz university of medical sciences, tabriz, ir iran mojgan atabakhash student research committee, hamadan university of medical sciences, hamadan ir iran saeed khosropour student research committee, hamadan university of medical sciences, hamadan ir iran abozar mohaghgeghi student research committee, hamadan university of medical sciences, hamadan ir iran

conclusions these results suggest that serum cholesterol, phospholipids and triacylglycerols have no effect on the levels of cholesterol, phospholipids and triacylglycerols of spermatozoa and seminal plasma. our findings suggest that sperm lipid content is regulated locally within the male reproductive tract. patients and methods cholesterol, phospholipids and triacylglycerols in sperm cells, s...

The paper is focused on the formation of hydroxyapatite nanoparticles (HAp) in polyelectrolyte-modified microemulsions, in a microemulsion template phase consisting of cyclohexane, water, cationic surfactant and cosurfactant, in the presence of Na-polyacrylate (PAA) as an anionic polyelectrolyte. It is shown that PAA, can be incorporated into the individual inverse microemulsion droplets. The m...

Journal: :Biomaterials 1983
L C Sederel L van der Does B J Euverman A Bantjes C Kluft H J Kempen

Gamma irradiation of aqueous solutions of a synthetic heparinoid polyelectrolyte results in the formation of hydrogels, varying in water content and mechanical strength. The equilibrium water content and the mechanical strength of the hydrogels are dependent on the initial polyelectrolyte concentration, the molecular weight of the polyelectrolyte, the percentage of double bonds in the polyelect...

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: :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: :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...

2006
Erhan Süleymanoglu

Thermodynamic features related to preparation and use of self-assemblies formed between multilamellar and unilamellar zwitterionic liposomes and polynucleotides with various conformation and sizes are presented. The divalent metal cation induced adsorption, aggregation and adhesion between single- and double-stranded polyribonucleotides and phosphatidylcholine vesicles was followed by different...

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