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New Findings from Adam Mickiewicz University Describe Advances in Essential Amino Acids (Physicochemical and sorption properties of multi-walled...

July 29, 2014



New Findings from Adam Mickiewicz University Describe Advances in Essential Amino Acids (Physicochemical and sorption properties of multi-walled carbon nanotubes decorated with silver nanoparticles)

By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Essential Amino Acids are discussed in a new report. According to news reporting originating from Poznan, Poland, by NewsRx correspondents, research stated, "Multi-walled carbon nanotubes (CNTs) modified with silver nanoparticles were tested as adsorbents of L-phenylalanine amino acid. CNTs were impregnated with an aqueous solution of silver nitrate(V) in the amount necessary to obtain the Ag loading of 1, 3 and 5 wt.%."

Our news editors obtained a quote from the research from Adam Mickiewicz University, "The materials were characterised by X-ray diffraction, transmission electron microscopy and low-temperature nitrogen adsorption. TEM and XRD data clearly revealed the presence of spherical Ag nanoparticles of the mean size similar to 20 nm on the carbon nanotubes surface. The modification with silver was evidenced to strongly affect the textural properties of the support. L-Phenylalanine was adsorbed on the surface of the materials obtained from buffer solutions of pH 5.6 at 20 degrees C. The sorption capacities of the silver-modified multi-walled carbon nanotubes towards amino acid increased with increasing percentage content of silver. The process of L-phenylalanine adsorption onto the materials studied can be described by a Langmuir type isotherm."

According to the news editors, the research concluded: "Thermogravimetric measurements of the samples after L-phenylalanine adsorption proved that for temperatures from the range similar to 160-250 degrees C, the condensation of L-phenylalanine molecules takes place on the nanotubes surface leading to formation of peptides that desorb into the gas phase at similar to 270 degrees C."

For more information on this research see: Physicochemical and sorption properties of multi-walled carbon nanotubes decorated with silver nanoparticles. Chemical Engineering Journal, 2014;250():295-302. Chemical Engineering Journal can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Chemical Engineering Journal - www.elsevier.com/wps/product/cws_home/601273)

The news editors report that additional information may be obtained by contacting J. Goscianska, Adam Mickiewicz Univ, Fac Chem, Lab Appl Chem, PL-61614 Poznan, Poland. Additional authors for this research include W. Nowicki and R. Pietrzak (see also Essential Amino Acids).

Keywords for this news article include: Poznan, Poland, Europe, Aromatic Amino Acids, Carbon Nanotubes, Emerging Technologies, Essential Amino Acids, Fullerenes, Nanoparticle, Nanotechnology, Phenylalanine

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


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Source: Life Science Weekly


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