Materials Literature
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A reconstituted collagen membrane from human amnion has been investigated as a source of collagen matrix, which could be used as a substratum for culturing human fibroblasts. The suitability of pepsin-solubilized reconstituted human amniotic membrane, before and after cross-linking with chitosan, as a dermal matrix fo…
Transient absorption spectrometry of Cu(I)-phenanthrolines in CH2Cl2 reveals ligand-independent dynamic processes lasting 15 ps, which are associated with the peculiar structural rearrangements occurring for this class of compounds upon photoexcitation.
A novel N3ArO-calix[6]arene-based system is presented. It allows the formation of an aryloxy radical bound to a metal ion (CuII or ZnII) that presents a free coordination site in a concave cavity. Its oxidative activity appears highly controlled by the supramolecular system hence providing a good model for radical enz…
Certain commercial aluminum alloys exhibit electrochemical activation in chloride media as a result of heat-treatment above 350°C. Activation is manifested by a significant negative shift in the corrosion potential and a significant increase in the anodic current output when polarized above the corrosion potential. Th…
Antimony nanotubes with inner diameters of 15–80 nm, wall thickness of 10–30 nm and lengths of up to several micrometers have been successfully prepared by a rational complexing-reduction route using zinc powder as reductant at low temperature (80–140 °C).
Abstract During membrane and thermal desalination, the saline solution becomes supersaturated. Once the solution becomes unstable, nucleation and crystallization of the salts occur resulting in a buildup of an unwanted deposit layer on transfer surfaces and increasing the mass‐ or heat‐transfer resistance of the syste…
Two conservation laws of nonlinear micropolar elasticity (Jk = 0 and Lk = 0) are derived within the framework of the Noether theorem on invariant variational principles, thereby extending the earlier authors' results from the couple stress elasticity. Two non-conserved M-type integrals of linear micropolar elasticity…
Large-scale (~1 cm2) measurements and immersion tests were conducted on stainless steels (SS) to study the role of Mo content and manganese sulfide (MnS) inclusions on corrosion. Higher S content increased the number of pits and an increase in Mo content produced smaller pits on SS. It was found that the Mo content in…
Modification of zeolite with copper oxide significantly promotes the selectively adsorption of volatile nitrosamines, beneficial for the removal of nitrosamines in cigarette smoke.
An overview of new concepts, new algorithms, and new computational protocols directed at synthetic chemists interested in generating chiral catalysts is presented in this report. A new mapping tool called stereocartography is described, which allows one to locate the most stereoinducing region around a proposed cataly…
For the improvement on corrosion resistance of Zn-5mass%-0.1mass%Mg hot-dip galvanized steel sheet, it was investigated that the influence of Al and Mg contents and Si addition in coating on the corrosion resistance of the coating.It was found that the corrosion resistance of Zn-11mass%Al-3mass%Mg-0.2mass%Si galvanize…
Peptide and protein microencapsulation into poly(lactide) (PLA) and poly(lactide-co-glycolide) (PLGA) microspheres continues to represent a technological challenge in terms of product sterility and up-scaling. The primary objective of this study was to examine the feasibility of a novel method for peptide and protein…
Co and Fe nanowires and/or nanotubes are electrochemically synthesized through nanoporous membranes. By combining high-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), and energy filtered TEM techniques, their structural and crystallographic characteristics are precisely d…
Abstract Ethylene vinyl acetate copolymer (EVA) and monmorillonite (MMT) nanocomposites have been investigated as a function of vinyl acetate content and molecular weight of EVA and types of substituted alkyl ammonium of MMT. It is found that vinyl acetate content and type of substituted alkyl ammonium are important f…
The effects of dissolved hydrogen on the thickness, structure, and composition of the passive film on iron formed in a boric/borate solution at pH 8.4 were investigated by Auger electron spectroscopy (AES), secondary ion mass spectrometry (SIMS), and nuclear reaction analysis (NRA). AES analysis showed that hydrogen d…
In this work, highly dispersed silica is obtained using a precipitation technique from emulsion medium. The selected emulsifier, applied in the process, allows production of silica with almost ideally spherical particles. To examine the tendency to aggregation, the silica powder is treated with commercially available…
Microstructures and strength of variously heat treated eutectoid steel were evaluated by magnetic property measurements. Isothermal transformation, continuous cooling or spheroidization heat treatment was performed to produce various microstructures. Microstructural parameters (phase, pearlite interlamellar spacing),…
In this paper, we reported an effective method for controlling CaSO4 crystal growth in organic media. Ca2+ and SO42− ions were extracted into the organic phase using different extractants. Different morphologies and sizes of CaSO4 nanocrystals including nanoparticles and nanosheets and long fibers were prepared by cha…
An equi-molar mixture of potassium fluoride (KF) and one of alkaline-earth or transition metal fluoride MIIF2 (MII = Mg, Ca, Mn, Fe, Co, Ni, and Zn) was ground in air by using a planetary ball mill to investigate mechanochemical (MC) synthesis of fluoroperovskites KMIIF3. Rietveld refinement for the ground mixtures wa…
The influence of various basic factors of combustion gas flow conditions on the recession rate of silicon nitride, silicon carbide, and alumina has been experimentally clarified, and the recession rate equation is deduced using the dependence of influential factors on the recession rate and the mass transfer theory. T…