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Application of infrared detection in the recording of eylid movements in rabbits

100%

Orlowska-Majdak M., Kolodziejski P., Dolecki K., Traczyk W. Z.

Acta Neurobiologiae Experimentalis

2001

vol. 61

issue 2

145-149

Classical conditioning of the eyelid reflex has been used for a long time to study associative learning in animals and humans. A new experimental procedure for rabbit?s eyelid conditioning was constructed and described. A phonopneumatic stimulator generated conditioned and unconditioned stimuli and a photoelectric transducer acting in close infrared converted movements of rabbits? eyelid to electric signals. An example of acquisition and extinction training is illustrated. This method of eyelid movement monitoring is noninvasive. It may be useful for chronic studies of learning processes in rabbits when used with headpieces for microdialysis probes, electrodes or cannulas which could be implanted into brain structures

On Temperature Dependence of Domain Structure in Cobalt

100%

Szmaja W., Polański K., Dolecki K.

Acta Physica Polonica A

1997

vol. 92

issue 2

469-472

The type-I magnetic contrast in a scanning electron microscope is used to study the domain behaviour on the basal planes of cobalt monocrystals of different thicknesses during a heating cycle. Digital image processing is applied to the original scanning electron microscope images for their restoration, enhancement and analysis. The main reasons for the application of digital image processing are: low level of type-I magnetic contrast, particularly used at the higher temperatures, and the complex character of the magnetic domain structure. The changes in both domain structures and type-I magnetic contrast are due to the strong temperature dependence of magnetocrystalline anisotropy energy for the hcp phase of cobalt, which implies the rotation of magnetic easy axis from the c-axis to the basal plane. The temperature of the magnetic phase transition between an open-flux and a closed-flux domain configuration was found to be dependent on the specimen thickness. The changes in domain structure during the heating cycle were reversible under the condition that the specimen was not carried through the hcp-to-fcc phase transition. Otherwise, they were partially or completely irreversible and were caused by crystal imperfections originating from the transition. The paper shows the great advantage of using digital image processing system for data restoration, enhancement and analysis.

Sputtering and Implantation of VV-6025X Surface with Slow Heavy Ions Monitored with PIXE

64%

Antoszewska M., Balcerski J., Brzozowski R., Dolecki K., Frątczak E., Gwizdałła T., Pawłowski B., Moneta M.

vol. 126

issue 1

136-137

In this work the characteristic radiation, emitted during interaction of medium energy (200 keV) ambient heavy ions (Ar) with Fe_{4}Co_{66}Si_{12}B_{14}Nb_{1}Mo_{2}Cu_{1} (VV-6025X) amorphous alloy, was measured in grazing incident-exit angle geometry and in time sequence, in order to determine dynamics of formation of subsurface region, damaged through implantation, sputtering and interface mixing. It was shown that structure and composition of surface is unstable against heavy ions irradiation due to preferential sputtering and implantation of ions, and recoils, and that the dynamics of such modification can be monitored in-situ with particle induced X-ray emission (PIXE) method.

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2 Acta Physica Polonica A

1 Acta Neurobiologiae Experimentalis

1 2014

1 2001

1 1997

3 Dolecki K.

1 Antoszewska M.

1 Balcerski J.

1 Brzozowski R.

1 Frątczak E.

1 Gwizdałła T.

1 Kolodziejski P.

1 Moneta M.

1 Orlowska-Majdak M.

1 Pawłowski B.

1 Polański K.

1 Szmaja W.

1 Traczyk W. Z.

Search results

Application of infrared detection in the recording of eylid movements in rabbits

On Temperature Dependence of Domain Structure in Cobalt

Sputtering and Implantation of VV-6025X Surface with Slow Heavy Ions Monitored with PIXE