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Magnetic correlations in Fe<sub>80</sub>B<sub>20</sub> studied by magnetic small angle neutron scattering
No full textFe80B20 alloys with different degrees of crystallization were investigated by small angle neutron scattering. From the analysis of the obtained scattering patterns with and without magnetic field, we were able to separate the magnetic and the nuclear scattering contributions and to study the evolution of both structural and magnetic parameters of the iron particles in the various steps of the crystallization process
Temperature dependence of the dynamics of superoxide dismutase by quasi-elastic neutron scattering
No full textThe atomic dynamics of the enzyme Cu, Zn superoxide dismutase has been investigated by means of quasi-elastic neutron scattering in the temperature range 4-320 K and in an extended momentum range up to 8.5 Angstrom(-1). Below 200 K the integrated elastic scattering intensity can be well described by a quasi-harmonic model, while above this temperature a pronounced decrease of the elastic intensity is observed, together with the onset of a small quasi-elastic component. This behaviour, which is similar to that already observed in other globular proteins, can be attributed to the onset of torsional degrees of freedom which give rise to transitions between slightly different conformational substates of the protein tertiary structure
Ricerca di funghi patogeni e caratterizzazione microbiologica delle Banquettes di Posidonia oceanica
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Valorizzazione delle risorse marine di Sardegna e Corsica: dati preliminari sulle spugne cornee
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