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1

Structure and function of DnaJ proteins

100%
Schmidt M.
Biotechnologia
|
1997
|
issue 2
57-64
EN
DnaJ, DnaK and GrpE make together a molecular chaperone system of the heat shock protein 70. The DnaJ protein originally identified in Escherichia coli gave the beginning of the DnaJ protein family, which now consists of over 20 members now of both prokaryotic and eukaryotic origin. The proteins of the DnaJ family are phylogenetically highly conserved and they show very similar modular architecture. They are involved at all stages of the cellular metabolism, during protein biosynthesis and maturation, in rearrangements of cellular macromolecules during functional cycles of assembly and disassembly, and of course in the protection against environmental stress. Some of the latest research has shown that a DnaJ homolog is related to tumor suppression - the Tid56 putative protein, a product of the lethal(2)tumorous imaginal discs gene.
2
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Energy Transfer in Peridinin-Chlorophyll-Protein-Metallic Nanoparticle Hybrid Nanostructure: Effect of Spatial Arrangement

63%
Schmidt M., Mackowski S.
Acta Physica Polonica A
|
2012
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vol. 122
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issue 2
307-311
EN
We theoretically investigate dynamics of excitation in a hybrid nanostructure comprising a photosynthetic complex peridinin-chlorophyll-protein (PCP) coupled to a gold spherical nanoparticle. Our model includes the analytical description of radiative and non-radiative relaxation channels of the chlorophylls in PCP, as well as the change of energy transfer rate within the PCP due to the presence of metal scatterer. We show that by measuring the intensity of fluorescence from selectively excited chlorophyll molecules in the PCP complex, elementary geometric properties of the system can be deduced.
3

Neoplastic cell transformation by viruses

51%
Schmidt M., Olejnik A., Gozdzicka-Jozefiak A.
Biotechnologia
|
2002
|
issue 1
87-104
EN
Tumor-inducing viruses occur in several taxonomic groups. All RNA tumor viruses belong to retrovirus family, but the DNA tumor viruses come from several different groups. Their oncogenic potential is associated with their replication strategy, and in a vast majority of cases oncogenic transformation occurs only if the viral life cycle is aborted. The oncogenic phenotype results from discrete changes in the expression of key cellular control genes: oncogenes and tumor suppressor genes. Most often, the retroviruses cause the activation of oncogenes, and DNA tumor viruses usually target tumor suppressor genes.
4
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Determination of Exchange and Rotatable Anisotropies in Co₂FeSi/IrMn Exchange Coupled Structures using Broadband Ferromagnetic Resonance

45%
Głowiński H., Schmidt M., Krysztofik A., Gościańska I., Dubowik J.
Acta Physica Polonica A
|
2015
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vol. 127
|
issue 2
531-533
EN
We determined exchange H_{ex} and rotatable H_{rot} anisotropy fields of multilayers that comprise 10 nm Co₂FeSi (CFS) layers exchange coupled to 20 nm IrMn layers by using ferromagnetic resonance with a vector network analyzer (VNA-FMR). The multilayer structures consist of IrMn/bottom (b)-CFS/IrMn/middle (m)-CFS/IrMn/top (t)-CFS/IrMn layers so that each CFS layer is surrounded by a pair of IrMn layers. In the structures, the exchange bias field propagates in such a way that H_{ex}^{t} > H_{ex}^{m} > H_{ex}^{b} for the top, middle, and bottom layer, respectively. FMR response measured along the exchange bias (EB) axis consist of only two absorptions related to the (b+m)- and (t)-CFS layers, respectively. Exchange and rotatable anisotropy determined independently from angular and dispersion measurements of the resonance fields are nearly the same. Rotatable anisotropy field scales with the exchange bias field in these complex structures.
5
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High-Quality Ni-Fe/Cu Multilayer Films with Antiferromagnetic Coupling

39%
Stobiecki F., Dubowik J., Luciński T., Szymański B., Rohrmann H., Röll K., Schmidt M.
Acta Physica Polonica A
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1997
|
vol. 91
|
issue 2
277-280
EN
We report structural and magnetic properties of Ni_{83}Fe_{17}/Cu multilayer films with various buffer layer and sublayer thicknesses of copper d_{Cu} and Permalloy d_{Py} deposited by face-to-face sputtering. The following features prove a good quality of our films: a well-layered structure, complete antiferromagnetic coupling with a low coupling strength (2×10^{-5} J/m^{2} for d_{Cu}=1 nm and 10^{-6} J/m^{^2} for d_{Cu}=2.1 nm) and a low coercive field which make them attractive for possible applications as giant magnetoresistance sensors.
6
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Characterization of nanostructured bulk cobalt triantimonide doped with tellurium and indium prepared by pulsed plasma in liquid method

33%
Zybała R., Schmidt M., Kaszyca K., Chmielewski M., Kruszewski M. J., Jasiński M., Rajska M., Ciupiński Ł.
|
2020
|
issue 1
7
Content available remote

Domains Stimulated Magnetostatic Coupling in NiFe/Au/Co/Au Multilayers Investigated by Complementary Methods

27%
Stobiecki F., Urbaniak M., Szymański B., Kuświk P., Schmidt M., Aleksiejew J., Weis T., Engel D., Lengemann D., Ehresmann A., Kopcewicz M.
Acta Physica Polonica A
|
2009
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vol. 115
|
issue 1
345-347
EN
The magnetic structure of Ni_{80}Fe_{20}/Au/Co/Au multilayers characterized by easy-plane and easy-axis perpendicular to the sample plane anisotropies for NiFe and Co, respectively, is strongly modified by magnetostatic coupling resulting from stray fields of stripe domains in the Co layers. Using complementary methods it will be shown that the magnetostatic coupling increases with decreasing Au spacer thickness, with the weakening of the easy plane anisotropy of the NiFe layers and with increasing thickness of the Co layers.
8
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Synthesis and Characterization of Antimony Telluride for Thermoelectric and Optoelectronic Applications

27%
Pietrzak K., Chmielewski M., Zybała R., Mars K., Mikuła A., Bogusławski J., Soboń G., Sotor J., Schmidt M., Kaszyca K., Ciupiński L.
Archives of Metallurgy and Materials
|
2017
|
vol. 62
|
issue 2
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