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Spektroskopia Elektronowego Rezonansu Paramagnetycznego

100%

Dyrek K. , Sojka Z.

Wszechświat

1989

tom 90

nr 09

Some physicochemical properties of commercial modified starches irradiated with microwaves

71%

Fortuna T. , Przetaczek-Roznowska I. , Dyrek K. , Bidzinska E. , Labanowska M.

Electronic Journal of Polish Agricultural Universities. Series Food Science and Technology

2008

tom 11

nr 4

Quantitative EPR measurements of Mn2+ centers in minerals

71%

Dyrek K. , Babińska J. , Bidzińska E. , Wyszomirski P. , Żabiński W.

Bulletin of the Polish Academy of Sciences. Chemistry

2002

tom Vol. 50, No.1

121-129

Two series of standards for quantitative EPR measurements of isolated and interacting Mn(2+) ions were obtained. The standards were applied for determination of the level of manganese impurities in sphalerites and illite clays. They were also used to check the effectiveness of doping of montmorillonites with Mn(2+) ions, which may create active centers for adsorption and catalysis.

Electron paramagnetic resonance (EPR) study of the short - living radicals generated thermally in phosphorylated maize starch with different amounts of amylose

61%

Bidzińska E. , Dyrek K. , Kruczała K. , Szczygieł J. , Wenda E. , Błaszczak W. , Fornal J.

Nukleonika

2013

tom Vol. 58, No. 3

429--433

Quantitative electron paramagnetic resonance (EPR) spectroscopy was used for the determination of a number and properties of short-living radicals generated thermally in maize starch with various amounts of amylose. The EPR spectra of radical adducts with N-tert-butyl-α-phenylnitrone (PBN) spin trap reveal the presence of three types of radicals of mobility related with their localization in the zones of various degree of crystallinity. Hylon VII, which represents a matrix with a high content of amylose, offers better conditions for free rotation of radical species, whereas waxy maize, containing almost exclusively amylopectin, exhibits more restricted dynamics.