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Tytuł:
Glycosaminoglycan concentration in cancer tissue
Autorzy:
Bar, Piotr
Galiniak, Sabina
Bartusik-Aebisher, Dorota
Filip, Rafał
Aebisher, David
Tematy:
fixed charge density glycosaminoglyca
magnetic resonance imaging
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Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Powiązania:
https://bibliotekanauki.pl/articles/454799.pdf  Link otwiera się w nowym oknie
Opis:
Introduction. Glycosaminoglycans (GAGs) play a widespread role in tissue modelling. GAG polymers may affect several receptor pathways in parallel. Aim. To present difference in concentration of GAG in healthy and cancer tissues. Material and methods. The literature search was performed nd reviewed using selected keywords. Results. We revieved the methods of detection various types of glycans measured by Magnetic Resonance Imaging. Conclusion. MRI methodology provides an efficient tool forstudy of cellular composition. The use T1 aof T2 measurements to study cancer tissue is a promising assay.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and Electronic Properties of the BN, BP and BAs in the Different Phases of Zinc-Blende, NaCl and CsCl
Autorzy:
Bencherif, K.
Yakoubi, A.
Mebtouche, H.
Tematy:
binary alloys
ab initio
lattice parameter
high pressure
band-structure
charge density
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Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1030312.pdf  Link otwiera się w nowym oknie
Opis:
In this work we used the first ab initio calculations to study the stability of the binary alloys BN, BP and BAs and their behavior in the different phases of zinc-blende, Nacl and CsCl. The full potential linearized augmented plane wave method was employed within density functional theory. Our results show the difference in the calculated structural properties and the band structure is obtained for the zinc-blende structure. We have investigated the lattice parameters and band gap energies. We also give the valence charge density at a high pressure and the analysis of the density of states.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classes of relativistic stars with quadratic equation of state
Autorzy:
Malaver, Manuel
Tematy:
Charge anisotropic matter distribution
Charge density
Field equations
Gravitational potential
Radial pressure
quadratic equation of state
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Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1194131.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we found new exact solutions to the Einstein-Maxwell system of equations with charged anisotropic matter distribution considering quadratic equation of state. We specify the gravitational potential Z(x) that depends of a adjustable parameter n and that allow integrate analytical the field equations in order to calculate the energy density, the radial pressure, the anisotropy, charge density and the mass function for different values of n. The obtained solutions can be written in terms of elementary and polynomial functions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystal Structure Prediction and Charge Density Distribution of Highly Energetic Dimethylnitraminotetrazole: a First Step for the Design of High Energy Density Materials
Autorzy:
Arputharaj, D. S.
Srinivasan, P.
Asthana, S. N.
Pawar, R. B.
Kumaradhas, P.
Tematy:
energetic materials
crystal structure prediction
charge density analysis
atoms in molecules
electrostatic potential
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Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:
https://bibliotekanauki.pl/articles/358205.pdf  Link otwiera się w nowym oknie
Opis:
The crystal structure of dimethylnitraminotetrazole has been predicted, based on systematically searching for densely packed structures within common organic crystal coordination types, followed by lattice energy minimization. The predicted crystal structures almost match the reported crystal structure determined by X-ray diffraction analysis. To understand the effect of the initial molecular geometry on the crystal packing, the crystal structure simulation was carried out for molecules taken from different environments, such as the X-ray structure (crystal field) and also from ab initiocalculations (gas phase). The predicted crystal structures from both environments are very similar to the reported X-ray structure with a maximum deviation of 4.5%. The crystal density predicted from both methods is close to that reported. The bond topological, energetic and electrostatic properties of the isolated molecule from the predicted crystal structure have been determined using Bader's theory of atoms in molecules. The bond topological characterization reveals that the C-N bond is the weakest bond in the molecule. A large electronegative potential is found in the vicinity of the NO2group and the nitrogen-rich region of the tetrazole ring; these are probably the reactive sites of this molecule.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quark star model with Tolman VII Type Potential
Autorzy:
Malaver, Manuel
Tematy:
Relativistic objects
anisotropic factor
MIT–Bag model
Tolman VII type potential
Charge density
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Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1192872.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we studied the behavior of relativistic objects with charged anisotropic matter distribution within the framework of MIT-Bag Model considering Tolman VII form for the gravitational potential Z. A physical analysis of electromagnetic field indicates that is regular in the origin and well behaved. In the obtained solution there is a singularity in the charge density. We show as the presence of an electrical field causes a modification in the radial pressure, the tangential pressure, the anisotropic factor and the mass of the stellar object.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrokinetic properties of silica-titania mixed oxide particles dispersed in aqueous solution of C.I. Direct Yellow 142 dye – effects of surfactant and electrolyte presence
Autorzy:
Chibowski, Stanisław
Wiśniewska, Małgorzata
Wawrzkiewicz, Monika
Hubicki, Zbigniew
Goncharuk, Olena
Tematy:
silica-titania composite
mixed oxides
zeta potential
solid surface charge density
dye adsorption
surfactant effect
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Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/1450752.pdf  Link otwiera się w nowym oknie
Opis:
The mixed $SiO_2$-$TiO_2$ oxide obtained by the pyrogenic method with the silica:titanium percentage ratio equal to 20:80 (ST80) was used in the experiments. The influence of azo dye C.I. Direct Yellow 142 (DY) adsorption at the mixed oxide-solution interface on the electrokinetic properties of solid particles was studied. To determine solid surface charge density and zeta potential of examined suspensions the potentiometric titration and Doppler laser electrophoresis techniques were applied. The changes in structure of electrical double layer formed on the mixed oxide surface in the dye presence were specified as a function of DY concentration, inorganic salt addition and surfactant introduction. The effects of surfactant type and its concentration were determined. Three surfactants of different ionic character (anionic SDS, cationic CTAB and nonionic Triton X-100) were used in measurements. The obtained electrokinetic characteristics of ST80 mixed oxide dispersed in aqueous solutions with various adsorbate compositions is essential for such suspensions stability.
Dostawca treści:
Biblioteka Nauki
Artykuł
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