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Secondary electron microscopy and transmission electron microscopy studies of carbon nanotubes in C-Ni films

100%
Kozłowski M., Dłużewski P., Kowalska E., Czerwosz E.
Open Physics
|
2011
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vol. 9
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issue 2
344-348
EN
Carbon nanotubes films have been studied with SEM and TEM. The studied films were obtained using a two step method: PVD process and CVD process. Strongly defected and curled carbon nanotubes containing Ni nanoparticles formed the film with thickness of about 300–400 nm. Observed carbon nanotubes were of lengths from 100 nm to 300 nm and did not stick to each other.
2
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The Influence of Technological PVD Process Parameters on the Topography, Crystal and Molecular Structure of Nanocomposite Films Containing Palladium Nanograins

88%
Rymarczyk J., Czerwosz E., Kozłowski M., Dłużewski P., Kowalski W.
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 3
18-24
EN
The paper describes the preparation and characteristics of films composed of Pd nanograins placed in carbonaceous matrix. Films were obtained in PVD (Physical Vapor Deposition) process from two sources containing: the first one - fullerene powder and the second one - palladium acetate. The topographical, morphological and structural changes due to different parameters of PVD process were studied with the use of Atomic Force Microscopy and Scanning Electron Microscopy, whereas the structure was studied with the application of the Transmission Electron Microscopy and Fourier Transform Infrared Spectroscopy methods. It was shown that topographical changes are connected with the decomposition ratio of Pd acetate as well as the form of carbonaceous matrix formed due to this decomposition. Palladium nanograins found in all films exhibit the fcc structure type and their diameter changes from 2 nm to 40 nm depending on the PVD process parameters.
3
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Protein composition of Saccharomyces cerevisiae mitochondrial ribosomes

87%
Mieszczak M., Kozłowski M., Zagórski W.
Acta Biochimica Polonica
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1988
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vol. 35
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issue 2
105-118
4
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MMP-10, MMP-7, TIMP-1 and TIMP-2 mRNA expression in esophageal cancer

76%
Juchniewicz A., Kowalczuk O., Milewski R., Laudański W., Dzięgielewski P., Kozłowski M., Nikliński J.
Acta Biochimica Polonica
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2017
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vol. 64
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issue 2
295-299
EN
Introduction: Tissue inhibitors of metalloproteinases (TIMP) and the matrix metalloproteinases (MMP) are involved in the spread of cancer. Methods: We have evaluated the matrix metalloproteinases' (MMP-10, MMP-7) and their inhibitors' (tissue inhibitors of metalloproteinases - TIMP-1, TIMP-2) mRNA expression in 61 esophageal cancer samples from patients who had undergone surgery, by using real-time quantitative RT-PCR, and correlated the results with the patient clinicopathologic features. Results: MMP-10, MMP-7, TIMP-1, TIMP-2 were overexpressed in 73%, 85%, 55% and 42% of esophageal cancer samples, respectively. The expression of MMP-10, TIMP-1, and TIMP-2 correlated with the tumor size. The MMP-7 overexpression was associated with the tumour stage (I, II vs III, p=0.05) and lymph node metastasis (N0 vs N1, p=0.037). Conclusions: We conclude that in the resected esophageal cancer an increased mRNA expression of MMP-7, MMP-10 and TIMP-1 correlated with clinicopathologic features. We suggest that these genes may play a role during progression of the disease.
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