Biohybrid polymers: novel options for regenerative therapies
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Materials Literature
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Phase content of metal-matrix composites of the system Fe-W-C which are formed by plasma precipitation
Melt crystallization peculiarities of the system have been investigated by means of X-Ray diffraction and microstructure analysis. It is shown that content changing of hexagonal tungsten carbide in the mixture essentially influences processes of phases formation at crystallization. It is ascertained that tungsten carb…
Copolymers of N-cyclohexylacrylamide and n-butyl acrylate: synthesis, characterization, monomer reactivity ratios and mean sequence length
Copolymerization of N-cyclohexylacrylamide (NCHA) and n-butyl acrylate (BA) was carried out in dimethylformamide at 55±1°C using azobisisobutyronitrile as a free radical initiator. The copolymers were characterized by 1H-NMR spectroscopy and the copolymer compositions were determined by 1H-NMR analysis. The reactivity…
Morphology and contact angle studies of poly(styrene-co-acrylonitrile) modified epoxy resin blends and their glass fibre reinforced composites
In this study, the surface characteristics of blends and composites of epoxy resin were investigated. Poly(styrene-co-acylonitrile) (SAN) was used to modify diglycedyl ether of bisphenol-A (DGEBA) type epoxy resin cured with diamino diphenyl sulfone (DDS) and the modified epoxy resin was used as the matrix for fibre r…
ON INTEGRAL OPERATORS WITH FIBER SINGULAR TYPE HOMOGENEOUS KERNELS IN THE SPACE LP(R2).
A new class of integral operators with fiber singular type homogeneous kernels in the space Lp(R2) is introduced. This new class includes the class of operators with SO(2)-invariant homogeneous kernels. For Banach algebra of pair operators with fiber singular type homogeneous kernels the symbol calculus is constructed…
HYDRAULIC BATTERY AS ELEMENT OF THE HYDRAULIC-MECHANICAL SYSTEM AND ITS DYNAMIC MODEL
It is given to information on methods dynamic calculation hydraulic systems, is offered conclusion to dynamic model of the hydraulic battery with pneumatic spring and its brought three-dementional acerbity.
CREOGEN TREАTМЕNT OF HАRD АLLOY CUTTING-TOOLS
There are given the research results on creogen treatment of hard alloy chisels and drills. The change of physico-mechanical characteristics of hard alloys and encreasing of firmness of cutting-tools after creogen treatment are determined.
Isothermal crystallization kinetics of poly(ethylene terephthalate) and poly(methyl methacrylate) blends
Different kinetic models like the Avrami, Tobin and Urbanovici-Segal models have been applied for determining the isothermal crystallization kinetics of virgin poly(ethylene terephthalate) (PET) and PET/poly(methyl methacrylate) (PMMA) blends. The different compositions investigated were PET90/PMMA10, PET75/PMMA25 and…
Evolution of Size and Shape in the Colloidal Crystallization of Gold Nanoparticles
The addition of dodecanethiol to a solution of oleylamine-stabilized gold nanoparticles in chloroform leads to aggregation of nanoparticles and formation of colloidal crystals. Based on results from dynamic light scattering and scanning electron microscopy we identify three different growth mechanisms: direct nanopart…
Reversible Oxidation State Change in Germanium(tetraphenylporphyrin) Induced by a Dative Ligand: Aromatic GeII(TPP) and Antiaromatic GeIV(TPP)(pyridine)2
Treatment of GeCl2(dioxane) with Li2(TPP)(OEt2)2 (TPP = tetraphenylporphyrin) in THF yields Ge(TPP), the first free Ge(II) porphyrin complex. In pyridine Ge(TPP) is converted to Ge(TPP)(py)2, an antiaromatic Ge(IV) complex, whereas in benzene the reaction is reversed, and pyridine dissociates from Ge(TPP)(py)2 to form…
The interface effect of the effective electrical conductivity of carbon nanotube composites
A model of the effective electrical conductivity for carbon nanotube (CNT) composites is presented by incorporating the interface effect with an average field theory. The dependence of the effective electrical conductivity on CNT length, diameter, concentration, and interface properties has been taken care of simultan…
MOISTURE TRANSMISSION THROUGH TEXTILES
Abstract Moisture transmission through textiles has a great influence on the thermo-physiological comfort of the human body which is maintained by perspiring both in vapour and liquid form. The clothing to be worn should allow this perspiration to be transferred to the atmosphere in order to maintaining the thermal ba…
FTIR Studies of Collagen Model Peptides: Complementary Experimental and Simulation Approaches to Conformation and Unfolding
X-ray crystallography of collagen model peptides has provided high-resolution structures of the basic triple-helical conformation and its water-mediated hydration network. Vibrational spectroscopy provides a useful bridge for transferring the structural information from X-ray diffraction to collagen in its native envi…
Simulation of Heme Using DFT + U: A Step toward Accurate Spin-State Energetics
We investigate the DFT + U approach as a viable solution to describe the low-lying states of ligated and unligated iron heme complexes. Besides their central role in organometallic chemistry, these compounds represent a paradigmatic case where LDA, GGA, and common hybrid functionals fail to reproduce the experimental…
A Tightly Coupled Bis(zinc(II) phthalocyanine)−Perylenediimide Ensemble To Yield Long-Lived Radical Ion Pair States
A conjugated donor-acceptor array composed of two phthalocyanines connected to the bay region of a perylenediimide is assembled by using palladium chemistry. Excitation of the phthalocyanine produces a nanosecond lived charge-separated state.
Influence of CuO on the Structure and Piezoelectric Properties of the Alkaline Niobate‐Based Lead‐Free Ceramics
Recently, it was reported that the alkaline niobate‐based (K,Na,Li)(Nb,Ta,Sb)O 3 (LF4) perovskite ceramics showed excellent piezoelectric properties and have been regarded as a new candidate of lead‐free piezoelectric materials. However, the effects of additives on the piezoelectric property of LF4 have not been studi…
Conductance quantization in graphene nanoribbons: adiabatic approximation
A theory of electron states for graphene nanoribbons with a smoothly varying width is developed. It is demonstrated that the standard adiabatic approximation allowing to neglect the mixing of different standing waves is more restrictive for the massless Dirac fermions in graphene than for the conventional electron gas…
Synthesis and VUV Photoluminescence Characterization of (Y,Gd)(V,P)O4:Eu3+ as a Potential Red-emitting PDP Phosphor
YVO 4:Eu 3+ -based phosphors in three series with compositions (Y 1 - x Eu x )(V 1 - z P z )O 4, (Y 0.95 - y Gd y Eu 0.05 )(V 0.4 P 0.6 )O 4 and (Y 0.95 - y Eu 0.05 Gd y )(V 1 - z P z )O 4 were synthesized and investigated as potential red-emitting phosphors for a plasma display panel (PDP). The optimal substitution p…
Animal glues: a review of their key properties relevant to conservation
Collagen-based animal glues are widely used in the conservation of artefacts, serving as adhesives, binders and consolidants for organic and inorganic materials. With a variety of different animal glues on the market, such as hide and bone glues, fish glues, isinglass and gelatin, their individual properties need to b…
First Principles Study of Nitrogen Doping at the Anatase TiO2(101) Surface
The incorporation of nitrogen impurities in the anatase TiO 2 (101) surface is investigated by first principles density functional theory calculations. Several substitutional and interstitial configurations and different concentrations for the N impurities in the surface and subsurface layers are considered, as well a…