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Magnetic properties of Ni-Mn-Ga Heusler alloy films
Dubowik, J.,Goś,ciań,ska, I.,Kudryavtsev, Y. V.,Lee, Y. P.,Sová,k, P.,Konĉ,, M. WILEY-VCH Verlag 2006 Physica Status Solidi C Vol.3 No.1
<P>The films with composition Ni<SUB>x </SUB>Mn<SUB>y </SUB>Ga<SUB>z </SUB> (x = 50 ± 5, y = 25 ± 5, z = 25 ± 5) were deposited by flash-evaporation or sputtering on mica and glass substrates and annealed in a high vacuum at 673–973 K. X-ray diffraction at room temperature reveals the presence of B2 (or L2<SUB>1</SUB>) type of structure depending on annealing conditions. Magnetic properties were studied by ferromagnetic resonance at temperatures from 78 K to 400 K and compared with electric resistivity data. It is shown that the magnetic properties of the films critically depend on their structural ordering and microstructure. The films annealed at T < 800 K reveal a complex magnetic behavior due to their specific microstructure while those annealed at T > 800 K show magnetic properties comparable with those of bulk Ni-Mn-Ga alloys. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)</P>
Electrochemical properties of modified negative electrode for Ni-MH cel
K. Lota,P. Swoboda,I. Acznik,A. Sierczyńska,R. Mańczak,Ł. Kolanowski,G. Lota 한국물리학회 2020 Current Applied Physics Vol.20 No.1
This study discusses the influence of different composition of negative electrode material on the performance of Ni-MH cells. Two major groups of multicomponent alloys were used during the experiments: AB5 and AB2 types. The best capacity was observed for the AB5-type alloy with the highest content of Co in its structure. The presence of Co in the alloy increased the capacity of the negative electrode most likely as a result of hydriding/ dehydriding processes or Faradaic reaction following the dissolution-precipitation mechanism. The influence of different amounts of nickel (0–20 wt%) was determined. The presence of nickel in the electrode materials increased the current density as well as the diffusion of hydrogen into the bulk of alloys. Moreover, the carbon materials have been used as an additive for negative electrode grains in order to increase the conductivity and hydrogen sorption properties.
Łukasz K. Kaczyn´ ski,Dorota Cais-Sokolin´ska,Artur Szwengiel 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.5
The aim of this work was the analysis of galactooligosaccharides (GOS) formation in a model mixture of goat’s milk and its permeate from microfiltration and further concentration by ultrafiltration based on the hydrolysis and transgalactosylation of lactose under various temperature and time regimes. These reactions were catalyzed by a β-galactosidase from Kluyveromyces lactis. Simultaneous hydrolysis and transgalactosylation of the milk lactose was carried out at 37, 40, and 43 °C for 6 h. The maximum GOS content in the mixture was obtained at 37 °C after 20 min. It was 6.9% of the total sugars and the degree of lactose hydrolysis was 13.3%. This was about 10% more GOS than in milk. The mixture containing GOS had a faster maximum acidification rate, 33% greater than before transgalactosylation.
Karczyń,ska, Agnieszka,Mozolewska, Magdalena A.,Krupa, Paweł,Giełdoń,, Artur,Bojarski, Krzysztof K.,Zaborowski, Bartłomiej,Liwo, Adam,Ś,lusarz, Rafał,Ś,lusarz, Magdalena,Lee, Jooyo Elsevier 2018 Journal of molecular graphics & modelling Vol.83 No.-
<P><B>Abstract</B></P> <P>Knowledge-based methods are, at present, the most effective ones for the prediction of protein structures; however, their results heavily depend on the similarity of a target sequence to those of proteins with known structures. On the other hand, the physics-based methods, although still less accurate and more expensive to execute, are independent of databases and give reasonable results where the knowledge-based methods fail because of weak sequence similarity. Therefore, a plausible approach seems to be the use of knowledge-based methods to determine the sections of the structures that correspond to sufficient sequence similarity and physics-based methods to determine the remaining structure. By participating in the 12th Community Wide Experiment on the Critical Assessment of Techniques for Protein Structure Prediction (CASP12) as the KIAS-Gdansk group, we tested our recently developed hybrid approach, in which protein-structure prediction is carried out by using the physics-based UNRES coarse-grained energy function, with restraints derived from the server models. Best predictions among all groups were obtained for 2 targets and 80% of our models were in the upper 50% of the models submitted to CASP. Our method was also able to exclude, with about 70% confidence, the information from the servers that performed poorly on a given target. Moreover, the method resulted in the best models of 2 refinement targets and performed remarkably well on oligomeric targets.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hybrid (physics- and template-based) approach to protein structure prediction. </LI> <LI> Molecular dynamics with coarse-grained UNRES model, restraints from templates. </LI> <LI> Restraints derived from similar fragments of multiple templates. </LI> <LI> Method able filter out information from poor templates (70% confidence). </LI> <LI> Outstanding prediction obtained for some targets. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Mobility and density relaxation of photogenerated charge carriers in organic materials
R. Osterbacka,A.Pivrikas,G.Ju ska,K.Genevi cius,K.Arlauskas,H.Stubb 한국물리학회 2004 Current Applied Physics Vol.4 No.5
We have measured mobility and density relaxation of photogenerated charge carriers in regiorandom poly(3-hexylthiophene)using novel extraction current transient techniques. We show how to obtain time-dependent mobilityl and charge carrier densitypusing independent measurements. The results showl / t. 0:42 independent on charge carrier density. The carrier density follows abimolecular decay with the bimolecular recombination coecientb ¼ 7:2 . 10. 13 cm3/s. The measured time-of-ight current fol-lows closely the estimated time decay asjðtÞ/pðtÞl ðtÞ, with deviation arising from extraction of the generated charge carriers.
Serum Concentrations of Selenium and Copper in Patients Diagnosed with Pancreatic Cancer
Marcin R. Lener,Rodney J. Scott,Anna Wiechowska-Koz!owska,Pablo Serrano-Fernández,Piotr Baszuk,Katarzyna Jaworska-Bieniek,Grzegorz Sukiennicki,Wojciech Marciniak,Magdalena Muszy"ska,Józef K!adny,Tomas 대한암학회 2016 Cancer Research and Treatment Vol.48 No.3
Purpose Understanding of the etiology and pathogenesis of pancreatic cancer (PaCa) is still insufficient. This study evaluated the associations between concentrations of selenium (Se) and copper (Cu) in the serum of PaCa patients. Materials and Methods The study included 100 PaCa patients and 100 control subjects from the same geographical region in Poland. To determine the average concentration of Se, Cu, and ratio Cu:Se in the Polish population, assay for Se and Cu was performed in 480 healthy individuals. Serum levels of Se and Cu were measured using inductively coupled plasma mass spectrometry. Results In the control group, the average Se level was 76 !g/L and Cu 1,098 !g/L. The average Se level among PaCa patients was 60 !g/L and the mean Cu level was 1,432 !g/L. The threshold point at which any decrease in Se concentration was associated with PaCa was 67.45 !g/L. The threshold point of Cu level above which there was an increase in the prevalence of PaCa was 1,214.58 !g/L. In addition, a positive relationship was observed between increasing survival time and Se plasma level. Conclusion This retrospective study suggests that low levels of Se and high levels of Cu might influence development of PaCa and that higher levels of Se are associated with longer survival in patients with PaCa. The results suggest that determining the level of Se and Cu could be incorporated into a risk stratification scheme for the selection and surveillance control examination to complement existing screening and diagnostic procedures.
Neutron Diffraction Study of Phase Stresses in Al/SiCp Composite During Tensile Test
Elżbieta Gadalińska,Andrzej Baczmański,Sebastian Wroński,Przemysław Kot,Marcin Wroński,Mirosław Wróbel,Christian Scheffzük,Gizo Bokuchava,Krzysztof Wierzbanowski 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.3
The stress partitioning between phases, phase stress relaxation as well as origins of Al/SiCp composite strengthening arestudied in the present work. In this aim, the measurements of lattice strains by neutron diffraction were performed in situ duringtensile test up to sample fracture. The experimental results were compared with results of elastic–plastic self-consistentmodel. It was found that thermal origin phase stresses relax at the beginning of plastic deformation of Al/SiCp composite. The evolution of lattice strains in both phases can be correctly simulated by the elastic–plastic self-consistent model onlyif the relaxation of initial stresses is taken into account. A major role in the strengthening of the studied composite plays atransfer of stresses to the SiCpreinforcement, however the hardness of Al metal matrix is also important.