Materials Literature
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Thermosetting polymers (also called thermosets) are a family of plastics characterized by the fact that they are formed starting from a liquid solution that irreversibly leads to a solid material during a heating step. This chapter focuses on some aspects of the chemistry of epoxy polymers because it provides examples…
This chapter talks about structure of polymer chains, and mechanical properties of polymers and polymer composites. Properties of polymers, as in the case of any chemical compound, are highly dependent on the structure of the polymer chains and the molecular weight resulting from the number of units covalently bonded.…
The chapter talks about principles of polymer processing. Most polymeric raw materials are available in the solid state as granules, flakes, or powders. Solid raw materials have to be transformed into a fluid or plastic state, which is accomplished by heating. Once in the plastic or fluid state, the material is shaped…
Original scientific paperIn this research the influence of sliding speed on friction and wear of TiN coatings during dry reciprocating sliding against alumina ball was studied.Additionally, in order to find the optimum sliding speed, the coatings with different surface roughness were tested.The range of surface roughn…
O estresse oxidativo esta envolvido na etiologia de diversas doencas cronicas, incluindo doencas cardiovasculares, diabetes, câncer, e doencas neurodegenerativas. A partir desta perspectiva, nos avaliamos as possiveis capacidades antioxidantes de cinco diferentes ftalocianinas (PCs), consistindo de 4 metaloftalocianin…
The articled is devoted to «p-q» instantaneous reactive power theory. Two facts of critics of this power theory is analyzed. The first critical fact is about wrong current compensation in case of active current filter which works in power net with unbalanced voltage. It was shown that coordinate transform matrixes don…
PANI
A new recording material with silver bromide nanoparticles and photopolymerization system has been prepared and tested as a recording medium for optical holography. Through the method of the real-time measurement of a diffraction grating growth, we have shown that an efficient volume phase grating is formed during a h…
Las nanofibras de carbono (CNF) son un tipo de material sintetico de carbono nanoestructurado, de naturaleza similar al grafito, con ventajosas propiedades para diversos campos de aplicacion como la catalisis o los materiales compuestos. El trabajo presentado en esta tesis aborda el estudio de la influencia de las con…
A nanosilver-epidermal growth factor sustained-release carrier was synthesized with the self-assembly method and characterized by transmission electron microscopy and Ultra violet (UV) spectrophotometry. The biological activity of the sustained release carrier was determined through cytological, bacteriological, and w…
We have studied the effect of electron scattering on the momentum-dependent energy gap distributions in MgB2 by measuring planar tunnel junctions made from epitaxial MgB2 thin films on different substrates, of different thicknesses, with different junction interface properties, and different counter-electrode material…
Experiments of pulse CO2 laser produced tin plasma had been carried out. Plasma parameters of electron temperature and density measurements both in axial and radial direction had been performed from a two-dimensional time and space resolved image spectra analysis. Debris speed of laser produced plasma in various buffe…
The high sensitivity at single molecule level of fluorescence correlation spectroscopy (FCS) enables measurements of charged polymer molecules at extreme dilution condition, which has been difficulty for conventional techniques as dynamic light scattering. By FCS, the conformation transition of single chain of polyele…
Against the background of climate objectives and the desired reduction of CO2-emissions, optimization of existing industrial products is needed. To counter rising raw material costs, currently used materials are substituted. This will places new requirements on joining technologies for dissimilar material classes. The…
Surface Enhanced Raman Spectroscopy (SERS) is a popular method in bio-analytical chemistry and a potentially powerful enabling technology for in vitro diagnostics. SERS combines the excellent chemical specificity of Raman spectroscopy with the good sensitivity provided by enhancement of the signal that is observed whe…
GaMnAs-based magnetic tunnel junction (MTJ) devices are characterized by in-plane and perpendicular-to-plane magnetotransport at low temperatures. Perpendicular-to-plane transport reveals the typical tunneling magnetoresistance (TMR) signal. Interestingly, a similar TMR signature is observed in the in-plane transport…
We examine several widely used statistical field theoretic methods in theoretical polymer physics. A systematic derivation for the polymer field theoretic model is given within the framework of the effective Landau theory. After constructing the field theoretic model, we perform a perturbative expansion of the model,…
Several studies, over recent years, focus on the use of chitosan, a biocompatible macromolecule, to form gold nanoparticles (GNPs). In this study, gold nanoparticles were synthesized using chitosan and Chloroauric acid, under stirring which cause micro/nano-gels to form. Ultraviolet (UV) light is used to reduce soluti…
Biocompatible nanoparticles have recently attracted significant attention due to increasing interest in their use for biological sensing, cellular labeling and in vivo imaging. Semiconductor quantum dots (QDs) with good colloidal stability as well as small hydrodynamic sizes are particularly useful within these applic…
While upconverting lanthanide nanoparticles have numerous advantages over other exogenous contrast agents used in scanned multiphoton imaging, their long luminescence lifetimes cause images collected with non-descanned detection to be greatly blurred. We demonstrate herein the use of Richardson-Lucy deconvolution to d…