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A comparison between the crystal and solution structures of Escherichia coli asparaginase II.

100%

Kozak M. , Jurga S.

tom 49

nr 2

509-513

The small angle X-ray scattering (SAXS) pattern of the homotetrameric asparaginase II from Escherichia coli was measured in solution in conditions resembling those in which its crystal form was obtained and compared with that calculated from the crystallographic model. The radius of gyration measured by SAXS is about 5% larger and the maximum dimension in the distance distribution function about 12% larger than the corresponding value calculated from the crystal structure. A comparison of the experimental and calculated distance distribution functions suggests that the overall quaternary structure in the crystal and in solution are similar but that the homotetramer is less compact in solution than in the crystal.

Improvement of supercapacitor parameters by nickel ion intercalation into activated carbon

88%

Venhryn B. Y. , Grygorchak I. I. , Kulyk Y. O. , Mudry S. I.

tom Vol. 31, No. 1

126-132

The relation between the porous structure and the electron structure in carbon materials was investigated in order to optimize the effiency of the physical-chemical processes in an electric double layer (EDL) formed at the boundary between the carbon material and the electrolyte (KOH 30 % aqueous solution). In particular, an Ni2+ intercalative modification of nanoporous carbon resulted in more than a triple increase in the specific capacitance and a significant improvement of the charge-discharge kinetics in the EDL.

An attempt to use SAXS method in evaluating different types of wheat flours

63%

Pikus S. , Jamroz J. , Olszewska E. , Wlodarczyk-Stasiak M.

nr 1

Small Angle X-ray Scattering (SAXS) has been applied to the study of starch structure in wheat flour. The quality of the range changes of starch microstructure after milling was analysed and a certain relationship of SAXS scattering magnitudes with alveographic study was shown.