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Trieste, Italy

Lukin K.A.,Ukrainian Academy of Sciences | Machekhin Y.P.,Kharkov National University of Radio Electronics | Danailow M.B.,Laser Laboratory | Tatyanko D.N.,Ukrainian Academy of Sciences
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika) | Year: 2011

The result of the investigations into the optical interferometry using the low-coherent radiation sources beyond the coherence zone are presented. It is shaven that when the difference in the Michelson interferometer arms exceeds the coherence length of a light-emitting diode (LED) radiation, the spectral interference phenomenon may well be utilized to make measurements ofmicro- and nanodistances depending upon the delay time and the relative phase between the reference and probing signals. © 2011 by Begell House, Inc. Source


Ullal C.K.,Max Planck Institute for Biophysical Chemistry | Primpke S.,University of Gottingen | Schmidt R.,Max Planck Institute for Biophysical Chemistry | Bohm U.,Max Planck Institute for Biophysical Chemistry | And 4 more authors.
Macromolecules | Year: 2011

A study was conducted to demonstrate flexible microdomain specific staining of block copolymers (BCP) for 3D optical nanoscopy. Homopolymers were tagged by incorporation of reactive functional groups during synthesis that were reacted with complementarily functionalized dyemolecules. Two variants of two common click chemistry reactions were used, including the thiol-ene and the alkyne-azide Huisgen cycloaddition reactions, to ensure efficient and selective coupling. The synthesis of the functionalized polymers was performed through RAFT polymerization. Two equally viable synthesis routes were undertaken where the first resulted in a thiol end-functionalized polymer and the second scheme yielded a statistical copolymer with a small number of units containing an exposed alkyne side group. Source


Lukin K.A.,Ukrainian Academy of Sciences | Machekhin Yu.P.,Kharkov National University of Radio Electronics | Tatyanko D.N.,Ukrainian Academy of Sciences | Danailov M.B.,Laser Laboratory
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika) | Year: 2013

The concept of applying a spectral interferometry method to creating the optical frequency grids to be used for metrological maintenance of fiber-optics telecommunications is proposed and investigated. © 2013 by Begell House, Inc. Source


Nisenbaum M.,Biochemical Engineering Group | Bouchet A.,Digital Processing Image Group | Guzman M.N.,Laser Laboratory | Gonzalez J.F.,Biochemical Engineering Group | And 4 more authors.
International Journal of Environment and Health | Year: 2014

The movement of the microorganisms towards a higher concentration of the chemical attractant is called positive chemotaxis and is involved in the efficiency of chemical degradation. Several studies are focused in this field related to genomics, and towards demonstrating chemotactic responses by bacteria, but there is little information related to the activity and morphology of their response. In this work, we use a recently reported dynamic speckle laser method, to process images and to distinguish motile surface patterns per area of colonisation by applying image processing techniques called fuzzy mathematical morphology (FMM). The images of bacterial colonies are usually surfaced, with vague edges and non-homogeneous grey levels. Hence, conventional image processing methods for shape analysis cannot be applied in these cases. In this paper, we propose the application FMM to solve this problem. The approach given was effective to segment, detect and also to describe colonisation patterns. Copyright © 2014 Inderscience Enterprises Ltd. Source

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