Search Results

You are looking at 1 - 2 of 2 items for

  • Author or Editor: Elena Parfenyuk x
  • Refine by Access: All Content x
Clear All Modify Search

Abstract  

Human serum albumin (HSA) adsorbed onto silica nanoparticles modified by 3-aminopropyltriethoxysilane (APTES) and polyethyleneimine (PEI) was investigated by differential scanning calorimetry, IR spectroscopy, and photon correlation spectroscopy. The structural alterations of the protein molecules induced from adsorption process were estimated on the basis of temperatures of denaturation transition (T d) of the protein in free (native) and adsorbed form. It was found that adsorption of the protein onto the APTES-modified silica nanoparticles results in an increase in the temperature of denaturation transition from 42 to 47.4 °C. HSA adsorbed onto the PEI-modified silica nanoparticles unfolds extensively.

Restricted access

Abstract

Physical-chemical characteristics of molecular complexes of Zn(II)tetra-tert-butylphthalocyanine (Zn(tert-Bu)4Pc) with aromatic solvents were obtained. The results show that polarization parameters of the interacting molecules play an important role in stabilization of the phthalocyanine π–π complexes. Dispersion forces are the major factor governing the π–π complex formation of Zn(tert-Bu)4Pc with aromatic molecules. The metallophthalocyanine may be applicable as efficient analytical reagent for separation of isomeric forms of aromatic molecules.

Restricted access