Materials Literature
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Full-atomistic molecular dynamics simulations are used to study the shape-memory behaviour of a representative amorphous polymer. A virtual polyisoprene was constructed and subjected to uniaxial stretch and hydrostatic compression thermomechanical cycles. Uniaxial stretch loading results demonstrate that a temporary s…
Purpose: The microcrystalline cellulose is an important ingredient in pharmaceutical, food, cosmetic and other industries. This study aimed at evaluating the physical characteristics of microcrystalline cellulose (CP-MCC), obtained from the raw cotton of Cochlospermum planchonii. Methods: CP-MCC was obtained from the…
Nitroxide diradicals, in which nitroxides are annelated to m-phenylene forming tricyclic benzobisoxazine-like structures, have been synthesized and characterized by X-ray crystallography, magnetic resonance (EPR and 1H NMR) spectroscopy, as well as magnetic studies in solution and in solid state. For the octamethyl de…
Abstract In this article, shape memory polyurethane fibers were prepared by wet spinning. The shape memory switching temperature was the melting temperature of soft segment polycaprolactone phase at 36.20°C. The fibers' mechanical properties, especially the shape memory properties, were explicitly characterized and co…
This paper intends to reflect, from the biophysical viewpoint, our current understanding on interfacing nanomaterials, such as carbon nanotubes and fullerenes, with biological systems. Strategies for improving the solubility, and therefore, the bioavailability of nanomaterials in aqueous solutions are summarized. In p…
A wrinkle formation mechanism with cutaneous aging is addressed through a mechanical calculation of linear buckling. Skin is divided into five mechanically distinct layers in this study. In general, the outer layer is stiffer than the inner layer, so buckling occurs in the outer layer against the uniform compression c…
Two-photon absorption (TPA) properties and energy relaxation dynamics of meso- β doubly linked Ni(II) porphyrin arrays ( DLNi n, n = 2−5) in CHCl 3 have been investigated. DLNi n exhibits near-IR-extended absorption bands up to 1000 nm and enlarged TPA cross-section values without any one-photon contribution as the nu…
In the quest for suitable materials for hyperthermia we explored the preparation and properties of nanoparticles of Co ferrite. The material was produced by coprecipitation from water solution of Co and Fe chlorides and afterwards annealed at 400, 600 and 800 °C. The resulting particles were characterized by XRD, TEM,…
We calculate the hole and electron mobilities in naphthalene crystal from 10 to 300 K within the framework of the Holstein-Peierls model coupled with first-principles density-functional-theory-projected tight-binding band structures. All the electron-phonon coupling constants, including both local and nonlocal parts f…
By the combination of electron tomography with image segmentation, the properties of 299 NiO crystallites contained in 6 SBA-15 pores were studied. A statistical analysis of the particle size showed that crystallites between 2 and 6 nm were present with a distribution maximum at 3 and 4 nm, for the number-weighted and…
Undecaprenyl phosphate (Und-P) is a universal lipid carrier of glycan biosynthetic intermediates for carbohydrate polymers that are exported to the bacterial cell envelope. Und-P arises from the dephosphorylation of undecaprenyl pyrophosphate (Und-PP) molecules produced by de novo synthesis and also from the recycling…
BACKGROUND: With the increased manufacture and use of carbon nanoparticles (CNP) there has been increasing concern about the potential toxicity of fugitive CNP in the workplace and ambient environment. To address this matter a number of investigators have conducted in vitro and in vivo toxicity assessments. However, a…
A systematic investigation of the alkaline earth hydrides $\mathrm{Be}{\mathrm{H}}_{2}$, $\mathrm{Mg}{\mathrm{H}}_{2}$, $\mathrm{Ca}{\mathrm{H}}_{2}$, $\mathrm{Sr}{\mathrm{H}}_{2}$, $\mathrm{Ba}{\mathrm{H}}_{2}$, the corresponding deuterides, and their antecedent metals is reported. We calculate lattice parameters, el…
The moderately halophilic bacterium Halobacillus halophilus copes with the salinity in its environment by the production of compatible solutes. At intermediate salinities of around 1 M NaCl, cells produce glutamate and glutamine in a chloride-dependent manner (S. H. Saum, J. F. Sydow, P. Palm, F. Pfeiffer, D. Oesterhe…
What is already known about this subject • Creatinine clearance (CL) is used to assess glomerular filtration rate (GFR). However, it is known to slightly overestimate the true GFR, due to renal tubular secretion of creatinine. • During phase I‐III clinical trials, a 10–15% increase in serum creatinine has been observe…
The human arylamine N-acetyltransferases NAT1 and NAT2 play an important role in the biotransformation of a plethora of aromatic amine and hydrazine drugs. They are also able to participate in the bioactivation of several known carcinogens. Each of these enzymes is genetically variable in human populations, and polymo…
The demonstrated graphitization ability of oxides show that the simplistic view of the support playing a catalytically passive role in carbon nanotube synthesis can no longer be taken for granted. The proposed mechanisms suggest a single growth mechanism for both primary soot particles and carbon nanotubes synthesized…
Electrospun (e-spun) fiber mats of polycaprolactone (PCL; Mn = 80 000 g mol-1) with or without the presence of hydroxyapatite (HAp) nanoparticles (at 1% w/v based on the volume of the PCL solution) were successfully fabricated. The potential for use of these e-spun fiber mats as bone scaffolds was assessed by mouse ca…
Abstract Here, a theory of optical scattering by single‐wall carbon nanotube using modal expansion of the scattered and transmitted fields is developed. The effective‐boundary condition, derived previously using accurate quantum‐mechanical one‐electron tight‐biding approach, is employed to obtain the unknown coefficie…
Ag−hollandite nanofibers were synthesized through a simple hydrothermal process by oxidizing Mn(NO 3 ) 2 with AgMnO 4 in aqueous solution. The temperature was found to play an essential role in determining both the crystalline structure and the morphology of the Ag−hollandite materials, whereas the AgMnO 4 /Mn(NO 3 )…