Materials Literature
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The Red Queen remains (700 A.C.) found at Palenque, México, are examples of cinnabar (HgS) application to royal remains during pre-Hispanic times. The Red Queen remains are those of a ca. 30–35-yr-old female and present a striking similarity to the remains of another Mayan woman found at Copan, Honduras. Thus, coverin…
Background: Engineered nanomaterials such as metal oxide nanoparticles (NPs) offer unique physico-chemical properties and are widely used in sunscreen formulations and personal care products. NPs become coated with proteins when exposed to biological fluids, forming the 'nanoparticle-protein corona' (NP-PC), which may…
The possibility of making an optically large (many wavelengths in diameter) object appear invisible has been a subject of many recent studies. Exact invisibility scenarios for large (relative to the wavelength) objects involve (meta)materials with superluminal phase velocity [refractive index (RI) less than unity] and…
This paper describes an efficient synthesis system containing several “hard” approaches to fabricate copper nanowires (Cu NWs) with different scales (with outer diameters from 7 nm to 200 nm and lengths over several tens of micrometers). Both X-ray diffraction (XRD) and energy dispersive X-ray spectrometry (EDX) indic…
Notably enhanced Mn 2+ yellow emission is observed in CsCl modified and Eu 2+ / Mn 2+ codoped Ge – Ga – S glasses under near‐ultraviolet ( NUV ) excitation. The plausible efficiency of energy transfer ( ET ) from Eu 2+ to Mn 2+ is as high as 91%, which is obtained by measurement of luminescence decay of Eu 2+ in sampl…
NMR paramagnetic relaxation enhancements (PREs) of a series of structurally characterized, trigonal bis-trispyrazolylborate (Tp) chelates of high-spin Co(II), spanning 100-850 MHz in field, are reported. Prior knowledge of the metal-nucleus distances allows numerical extraction of position-dependent electron spin rela…
Using rare metal nitrate-doped multi-walled carbon nanotubes as the absorber and polyvinyl chloride as the matrix, the microwave electromagnetic and absorbing properties of multi-walled carbon nanotube/polyvinyl chloride composites were studied. The complex permittivity of the composites doped with different rare meta…
Sintering temperature dependences of specific surface area, pore size distribution, and pore volume of La Ni 0.6 Fe 0.4 O 3 ceramics prepared using the Pechini method have been evaluated from the adsorption isotherms of N 2 gas at −195.8°C. The specific surface area decreased almost linearly with increasing sintering…
Flowerlike LaPO4:Eu microstructures built up of nanorods with triangular pores in the ends have been successfully synthesized by a simple water–ethyleneglycol (EG) mixed solvothermal route in the presence of appropriate amounts of concentrated HNO3 and Eu2O3. Lanthanum nitrate (La(NO3)3) and monopotassium phosphate (K…
In this article, the microstructures of sisal fiber composites were analyzed. The porous structure of sisal fiber, crystalline morphology of matrix and fiber distribution in composites were characterized by Voronoi diagram. The tensile properties of composites were also measured. The results show that the maleated pol…
In present manuscript, Cannabis indica L. fibers were graft copolymerized in air with acrylonitrile using redox initiator system in order to improve the mechanical properties of Cannabis indica L/unsaturated polyester composites. The various reaction parameters such as time, temperature, pH, concentration of initiator…
Five hybrid compounds constructed from polyoxometalates, transition metals and organic ligands [Ni2(4,4′-bpy)5(H2O)2][HBW12O40]·5H2O (1), [Ni2(4,4′-bpy)5(Cl)2][H2SiW12O40]·3H2O (2), [Ni2(4,4′-bpy)5(Br)2][H2SiW12O40]·3H2O (3), [SiW12O40]3[Cu2(4,4′-bpy)7]·(H24,4′-bpy)2·4H3O·2H2O (4) and [SiW12O40]3[Cd2(4,4′-bpy)7]·(H24,…
The in-plane optical properties of the inhomogeneous iron-chalcogenide superconductor ${\mathrm{K}}_{0.8}{\mathrm{Fe}}_{2\ensuremath{-}y}{\mathrm{Se}}_{2}$ with a critical temperature ${T}_{c}=31\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ have been modeled in the normal state using the Bruggeman effective medium approxima…
Four tetranuclear complexes involving both homo- and hetero-metal combinations, viz. [Zn(II)(2)L(2)(μ(4)-PhCOO)(2)Zn(II)(2)(hfac)(2)] (1), [Cd(II)(2)L(2)(μ(4)-PhCOO)(2)Cd(II)(2)(hfac)(2)] (2), [Zn(II)(2)L(2)(μ(4)-PhCOO)(2)Tb(III)(2)(hfac)(4)] (3), and [Cd(II)(2)L(2)(μ(4)-PhCOO)(2)Tb(III)(2)(hfac)(4)] (4) have been pre…
The functional end products of the extant biosynthesis of tetrapyrrole macrocycles in photosynthetic organisms are hydrophobic: chlorophylls and bacteriochlorophylls. A model for the possible prebiogenesis of hydrophobic analogues of nature's photosynthetic pigments was investigated by reaction of acyclic reactants in…
A series of dendronized polymers (DP) were synthesized by attaching second-generation dendron onto the preformed DP core of generation 1–3 ( n + 2 approach). The obtained DP were compared to the reference DP prepared by the conventional graft-from ( n + 1) approach using GPC, UV–vis, 1 H NMR, and AFM analyses. The for…
Significant progress has been made in the development of in vitro-engineered skin substitutes that mimic human skin, either to be used for the replacement of lost skin or for the establishment of in vitro skin research models. However, at the present time, there are no models of bioengineered skin that completely repl…
In the present work, an ethanol fed Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT) system has been parametrically analyzed in terms of exergy and compared with a single SOFC system. The solid oxide fuel cell was fed with hydrogen produced from ethanol steam reforming. The hydrogen utilization factor values were kept betw…
Polypropylene composites reinforced with jute fabrics (Hessian cloth) were fabricated by heat-press molding technique. Mechanical properties of the composites such as tensile strength, tensile modulus, bending strength, bending modulus and impact strength were measured with reference to fiber loading in polypropylene…
The synthesis of capped mesoporous silica nanoparticles (MSN) conjugated with an antibody (AB) as a gatekeeper has been carried out in order to obtain a delivery system able to release an entrapped cargo (dye) in the presence of a target molecule (antigen) to which the conjugated antibody binds selectively. In particu…