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Wyświetlanie 1-9 z 9
Tytuł:
Nanomedicine – a review
Autorzy:
Dynarowicz, Klaudia
Aebisher, David
Powiązania:
https://bibliotekanauki.pl/articles/2053956.pdf
Data publikacji:
2022-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
nanomedicine
nanoscale
nanostructure
Opis:
Abstract Introduction and aim. Nanomedicine is a discipline of technology and science, the potential of which has recently fascinated scientists in the fields of physics, biotechnology, chemistry and medicine. This department deals with everything on the nano scale, i.e. on the level of individual atoms and molecules. This work presents the nano scale, i.e. on the level of individual atoms and molecules. Nanotechnology is currently one of the most popular and dynamically developing fields, not only in electronics, but above all in pharmacy and medicine. Material and methods. In this article a narrative review regarding nanomedicine. Analysis of the literature. The desire to summarize information about nanomedicine application of singlet oxygen is presented. Nanotechnology is a discipline of technology and science, the potential of which has recently fascinated scientists in the fields of physics, biotechnology, chemistry and medicine. Conclusion. The use of nanostructures is currently very efficient. The areas in which the potential of nanoparticles is constantly researched and confirmed by numerous articles are: radio- and chemotherapy, cancer diagnostics and imaging medicine (MRI and fluorescence imaging).
Źródło:
European Journal of Clinical and Experimental Medicine; 2022, 1; 102-108
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformable cell and deformable tissue as an area for application of nanoscale mechanics
Autorzy:
Kaczmarek, J.
Powiązania:
https://bibliotekanauki.pl/articles/175397.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
artificial muscle
deformable cell
nanoscale mechanics
Opis:
Materials undergoing deformation based on various mechanisms are frequently applied to manufacturing of artificial muscle actuators. In this paper we introduce a methodological step towards more precise determination of investigation object related to such actuators. One defines a deformable cell and a deformable tissue in order to indicate which functions of such objects should be integrated for further applications. One accentuates role of nanoscale models of mechanics of materials as important on way towards design of the deformable cells.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2011, 123; 99-112
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nano-Scale Structure Investigation of Vapour Deposited AlCrSiN Coating Using Transmission Electron Microscope Techniques
Autorzy:
Lukaszkowicz, K.
Labisz, K.
Basiaga, M.
Jonda, E.
Powiązania:
https://bibliotekanauki.pl/articles/352381.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AlCrSiN coating
PVD
HRTEM
SEM
nanoscale
Opis:
The investigations concerned the structural analysis of the AlCrSiN coating deposited by arc Physical Vapour Deposition method on the X40CrMoV5-1 hot work tool steel substrate. The deposition process was carried out on a device equipped with a technique of lateral, rotating cathodes. The nano/microstructure, phase identification and chemical state of the coating were analysed by high-resolution transmission electron microscopy. It was found that the investigated coatings have nanostructured nature consisting of fine crystallites. The fractographic tests were made using the scanning electron microscope and allow to state, that the coating was deposited uniformly and tightly adhere to the substrate material. In the work is presented the nature of a transition zone between the produced AlCrSiN coating and substrate material.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 837-842
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Aging and Degradation of Human Fingernail Plates Upon Cosmetic Agents
Autorzy:
Kulesza, S.
Bramowicz, M.
Gwoździk, M.
Wilczyński, S.
Goździejewska, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/354662.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Atomic Force Microscopy
Scanning Electron Microscopy
fractal characterization
nanoscale property mapping
Opis:
The knowledge whether and how chemical species react with tissues is important because of protection against harmful factors, diagnose of dermatological diseases, validation of dermatological procedures as well as effectiveness of topical therapies. In presented work the effects of chemical agents on plates of human fingernails were studied using Atomic Force Microscopy and Scanning Electron Microscopy. Apart from that, mapping of the elastic properties of the nails was also carried out. To obtain reliable measures of spatial evolution of the surface variations, recorded images were analyzed in terms of scaling invariance brought by fractal geometry, instead of common though not unique statistical measures.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 181-184
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of nanoscale zero-valent iron doped carbonized zeolitic imidazolate framework-8 for methylene blue removal in water
Autorzy:
Chen, Shuai
Qiao, Lemeng
Feng, Xuejiao
Huang, Yufu
Gao, Guilan
Guan, Jie
Lin, Donghai
Powiązania:
https://bibliotekanauki.pl/articles/2204144.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Nanoscale zero-valent iron
Carbonized zeolitic imidazolate framework-8
Mesoporous carbon
Methylene blue
Opis:
Nanoscale zero-valent iron-doped carbonized zeolitic imidazolate framework-8 (nZVI/CZIF-8) was prepared by carbonation of ferric nitrate and ZIF-8 at 800 °C and used as an adsorbent to remove methylene blue (MB) from water. The synthesized nZVI/CZIF-8 has a specific surface area of 806.9 m2/g, a pore volume of 0.86 cm3/g and an nZVI content of 1.35%, respectively. Both the nZVI/CZIF-8 and CZIF-8 have identical functional groups of O-H, C-H and C=C. With the increase of CZIF-8 size, MB removal rate increased. The doping of nZVI increased the MB removal percentage from 74.5% for ZIF-8 to 96.2% within 80 min for nZVI/CZIF-8. The MB removal percentage increased with the dosage of nZVI/CZIF-8. The MB adsorption with the adsorbents conforms to the Freundlich adsorption isothermal model and the removal rate fitted well to a pseudo-first-order model. The results demonstrate the feasibility of synthesizing high active and stable nZVI/CZIF-8 particles.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 1; 12--19
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, spectroscopic and thermogravimetric interpretations of UO2(II), ZrO(II), Zr(IV), VO(II) and V(V) ciprofloxacin antibiotic drug complexes
Autorzy:
Albedair, Lamia A.
Powiązania:
https://bibliotekanauki.pl/articles/1849331.pdf
Data publikacji:
2021
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ciprofloxacin
complexation
FTIR
Fourier transform infrared spectroscopy
diamagnetic
TEM
transmission electron microscopy
nanoscale
Opis:
New five ciprofloxacin (CIP) complexes of dioxouranium(II), oxozirconium(II), zirconium(IV), oxovanadium(II) and vanadium(IV) in the proportion 1:2 have been prepared using CIP as a drug chelate with UO2(NO3)2. 6H2O, ZrOCl2. 8H2O, ZrC4, VOSO4. xH2O and V2O5 respectively. The CIP complexes have been characterized based on the elemental analysis, molar conductance, magnetic, (FTIR & 1HNMR) spectral and thermal studies. The molar conductance studies of the synthesized complexes in DMSO solvent with concentration of 10–3 M indicate their non-electrolytic properties. At room temperature, the magnetic moment measurements revealed a diamagnetic behavior for all CIP prepared complexes. The different formulas of the new complexes can be represented as [UO2(CIP)2(NO3)2] (I), [VO(CIP)2(SO4)(H2O)] (II), [V2(O)(O2)2(CIP)2] (III), [Zr(O)(CIP)2(Cl)2] (IV), and [Zr(CIP)2(Cl)4] (V). The thermal analysis data of the complexes indicates the absence of coordinated water molecules except for vanadyl(II) complex (II). The CIP chelate is a uni-dentate ligand coordinated to the mentioned metal ion through terminal piperazinyl nitrogen. The transmission electron microscopy (TEM) investigation confirms the nano-structured form of the complexes.
Źródło:
Polish Journal of Chemical Technology; 2021, 23, 1; 45-52
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of damage processes in nanopillar arrays with hierarchical load transfer
Autorzy:
Derda, T.
Powiązania:
https://bibliotekanauki.pl/articles/122766.pdf
Data publikacji:
2016
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
stress transfer
probability and statistics
strength
damage mechanics
nanoscale
przenoszenie naprężeń
mechanika zniszczenia
wytrzymałość
nanoskala
Opis:
A computational model for the damage analysis in the axially loaded nanopillar arrays was developed on the basis of the Fibre Bundle Model and hierarchical load sharing protocol. The nanopillars are characterised by random strength-thresholds drawn according to the nanoscale Weibull statistics. We study the influence of the coordination number and the number of hierarchy levels on the system strength, size of the catastrophic avalanche and probability of breakdown.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2016, 15, 3; 27-36
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum-classical calculations of the nanomechanical properties of metals
Autorzy:
Dziedzic, J.
Powiązania:
https://bibliotekanauki.pl/articles/1964138.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska
Tematy:
hybric methods
cross-scaling
tight-binding
learn-on-the-fly
nanoscale
metals
nanoindentation
molecular-dynamics
Sutton-Chen potential
Opis:
Molecular-dynamics (MD) simulations constitute an important tool in the study of nanoscale metallic systems, especially so in the face of the difficulties plaguing their experimental analysis. Main limitations of the MD method stem from the empirical nature of the potentials employed, their functional form which is postulated ad hoc, and its classical nature. The neglect of electronic effects and the unjustified utilization of the potential for system configurations significantly different from those, for which the potential was parametrized makes the results of strictly classical calculations dubious, at least for a certain class of systems. On the other hand, high computational complexity of quantum-based methods, where atomic interactions are described ab initio, prohibits their direct use in the study of systems larger than several tens of atoms. In the last decade, a growing popularity of so-called hybrid (or cross-scaling) methods can be observed, that is, methods which treat the most interesting part of the system with a quantum-based approach, while the remainder is treated classically. Physically sound handshaking between the two methodologies (quantum and classical) within a single simulation constitutes a serious challenge, the majority of difficulties concentrating around the interface between the fragments of the system treated with the two methods. The aforementioned interface is most easily constructed for covalently bonded systems, where the bonds cut by the isolation of the quantum-based region can be saturated by the introduction of specially crafted link-atoms. In metallic systems, however, due to electronic delocalization, this traditional approach cannot be employed. This paper describes a physically sound and adequately efficient computational technique, which allows for the inclusion of results of locally employed quantum-based computations within a molecular-dynamics simulation, for systems described by the many-body Sutton-Chen (SC) potential, used in the study of fcc metals. The proposed technique was developed taking as a point of departure the Learn-on-the-Fly (LOTF) formalism, a recent development itself. The original LOTF approach is only suitable for two- or three-body potentials and is serial in nature, whereas the proposed technique can be used with many-body potentials and is parallel-ready. An implementation of the proposed approach in the form of computer code, which allows for parallel hybrid computations for metallic systems is also described. Finally, results from a set of hybrid simulations of nanoindentation of a copper workmaterial with a hard indenter utilizing the aforementoned technique and computer code is presented, as evidence of its viability.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2009, 13, 3; 207-310
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical approaches to the heat transfer problem in modern electronic structures
Autorzy:
Raszkowski, T.
Samson, A.
Powiązania:
https://bibliotekanauki.pl/articles/952934.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
nanoscale heat transfer
Fourier-Kirchhoff equation
dual-phase-lag equation
finite difference method
Runge-Kutta method
gear’s method
thermal analyses
Opis:
The main aim of this paper is to present a detailed description of the research related to the modeling of heat conduction in modern electronic structures, including special consideration for numerical aspects of analyzed algorithms. The motivation to undertake the research as well as some of the most-important results of the experiments and simulations are also included. Moreover, a numerical approximation of the problem as well as the methodology used and a sample solution of the mentioned problem are presented. In the main part, the discretization techniques, Ordinary Differential Equation algorithms, and simulation results for Runge-Kutta’s and Gear’s algorithms are analyzed and discussed. Additionally, a new effective approach to the modeling of heat transfer in electronic nanostructures is demonstrated.
Źródło:
Computer Science; 2017, 18 (1); 71-93
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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