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New Nanoparticles Study Findings Recently Were Reported by Researchers at Academy of Sciences of the Czech Republic (Rheological And Electrical...

September 12, 2014



New Nanoparticles Study Findings Recently Were Reported by Researchers at Academy of Sciences of the Czech Republic (Rheological And Electrical Properties Of Polymeric Nanoparticle Solutions And Their Influence On Rbc Suspensions)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanoparticles have been published. According to news reporting originating from Prague, Czech Republic, by NewsRx correspondents, research stated, "Rheological and electrical properties of polymeric nanoparticle solutions and their influence on the rheological and electrical properties of red blood cell (RBC) suspensions have been studied. Poly(acrylic acid) macromolecules of different architecture and molecular weight were used: (i) a new core-shell type star polymer whose interior forms hyperbranched polystyrene bearing arms of poly(acrylic acid) with molecular weight M-n = 56 920 Da and (ii) linear polyacrylic chains with average molecular weights M-n = 6000, 20000, and 225000 Da."

Our news editors obtained a quote from the research from the Academy of Sciences of the Czech Republic, "The polymers dissolved in physiological solution with weight concentrations 1 mg/ml and 0.2 mg/ml were used for the experiments. Under physiological conditions the star-shaped macromolecules present spherical nanoparticles while the linear poly(acrylic acid)s adopt an extended chain conformation close to rod-like particles. The apparent viscosity of the nanoparticle solutions and RBC suspensions in the presence and absence (the control) of nanoparticles were measured using a rotational viscometer Contraves Low Shear 30 (LS 30) at a steady flow at shear rates from 0.0237 to 94.5 s(-1) and temperature 37 degrees C. A method, based on the measurement of dielectric properties of dispersed systems in Couette viscometric blood flow was applied. A concurrent measurement system and data acquisition system implied into the Contraves LS 30 were used to quantify the electrical conductivity. The main advantage of this technique is that blood is subjected to a uniform shearing field in a Couette rheometric cell as well as the information about the mechanical and electrical properties of the fluid is obtained in parallel."

According to the news editors, the research concluded: "The results show that rheological and electrical properties of the nanoparticle solutions and RBC suspensions, namely their electrical conductivity and apparent viscosity, are dependent on the shear rates, shape, concentration and molecular weight of the polymers."

For more information on this research see: Rheological And Electrical Properties Of Polymeric Nanoparticle Solutions And Their Influence On Rbc Suspensions. Applied Rheology, 2014;24(3):28-34. Applied Rheology can be contacted at: Kerschensteiner Verlag Gmbh, Morikestr 4, Lappersdorf, 93138, Germany (see also Nanoparticles).

The news editors report that additional information may be obtained by contacting N. Antonova, Academy Sci Czech Republic, Inst Hydrodynam, Prague 16612, Czech Republic. Additional authors for this research include N. Koseva, A. Kowalczuk, P. Riha and I. Ivanovi.

Keywords for this news article include: Prague, Czech Republic, Europe, Emerging Technologies, Nanoparticle, Nanoparticles, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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