Materials Literature
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In this work were studied the tribological properties of coatings of molybdenum, silver, chrome + molybdenum, molybdenum + BrOF6.5-0.15, obtained by electrospark alloying method on 30X13stainless steel. At the load of 200 N was established dependence between the coating wear and its hardness, the higher the hardness,…
The dielectric integrity has been one of the major obstacle in bringing out capacitor devices with suitable performance characteristics at high temperatures. In this paper, B x N y O z dielectric films for high temperature capacitors solutions are investigated. The films were grown on silicon substrate by using ion so…
Komposit matriks aluminium berpenguat partikulat banyak dikembangkan untuk aplikasi komponen otomotif dan kendaraan taktis militer, karena mempunyai berat jenis yang lebih ringan dibanding logam ferrous serta memiliki performa yang baik seperti kekuatan tinggi, kekerasan tinggi, sifat tahan aus dan koefisien ekspansi…
Beton merupakan material bangunan yang paling banyak digunakan dalam kegiatan konstruksi, baik pada konstruksi bangunan gedung, jalan maupun konstruksi bangunan air. Salah satu keunggulan beton yaitu ketahanan beton terhadap tekanan dan bertahan lama ( durability ). Dewasa ini banyak penelitian tentang beton guna mena…
In the context of CO2 utilization, the electricity surplus from renewable energies can be used in a non-thermal microwave plasma reactor to reduce CO2 and produce chemical fuels. The chemical processes in non-thermal plasma are extremely complex due to the large number of excited species, radicals and ions that are pr…
In this work, the V‐shaped microfluidic junction (VMJ) device technique with gas/liquid interface was used to prepare textured polymer nanospheres from bubble bursting for drug delivery. The polymer/dye solution, N2 gas, and a volatile liquid, perfluorohexane (PFH) were simultaneously fed using the tubes into the VMJ…
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A novel dimethyl acrylate 18-membered macrocycle (DMECE), acting as both bifunctional monomer and cross-linker, was designed and synthesized, and thus employed to construct a series of macrocycle-containing amphiphilic hyperbranched polymers (HBPs). The macrocyclic recognition effect between the HBPs and alkali metal…
Aeruginosins are a class of cyanobacteria-derived bioactive linear tetrapeptides composed of nonproteinogenic amino-acid residues, such as the 2-carboxy-6-hydroxyoctahydroindole (Choi) moiety, which is the hallmark of aeruginosin. The biosynthetic pathway of the Choi moiety remains elusive. Previous studies have sugge…
Superhydrophobic nanotextured surfaces have gained increased usage in various applications due to their non-wetting and self-cleaning abilities. The aim of this study was to investigate nanotextured surfaces with respect to their resistance to the inception of freshwater biofouling at transitional flow conditions. Sev…
Over the past few years, there have been several instances in the oil and gas industry of incompatibilities and failures of stainless steel components carrying or containing chemical products. Material of construction compatibility with chemical products is a vital assessment to ensure asset integrity of critical comp…
This paper presents a closed expression for the lightning induced voltage in short loops, which considers the effect of the return stroke speed. It is shown that the traditional expression that provides the induced voltage as the product of the current time derivative by the mutual inductance is a particular case of t…
Vinyl chloride suspension polymerization using different temperature trajectories was carried out in a pilot scale batch reactor. Detailed understanding of the conversion at which the primary particles become motionless ( X m ) and the key effects of X m on morphology development of PVC grains were provided. Motionles…
A comparative study on two methods for dissolving of powder lignocelluloses, derived from wood lignocelluloses and from short-length flax fibers, in DMAc/LiCl was carried out. It was shown that DP v values of the samples and lignin content significantly affected their solubility. The lower these values were, the bette…
Aberration corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) was employed to study the distribution of barium atoms on the surfaces and in the interiors of boron carbide based nanowires. Barium based dopants, which were used to control the crystal growth, adsorbed to the su…
Nanotechnology or nanoscience covers the investigation, design, manipulation, precision placement, measurement, modelling or fabrication of matter, structures, devices and systems that exist at the nanoscale – essentially at the atomic and molecular size levels. Nanotechnology has the potential to change the way we ad…
AuAl2 is an intermetallic compound with a vivid purple colour attributable to a bulk plasmon energy in the visible part of the spectrum. However, the colour of as-deposited thin films is not as strong and only develops upon annealing. Density functional theory calculations of the dielectric function are presented for…
The influence of various sugar residue modifications on intrinsic energetic, conformational, and mechanical properties of 2'-deoxyribonucleotide-5'-monophosphates (dNs) was comprehensively investigated using modern quantum chemical approaches. In total, fourteen sugar modifications, including double bonds and heteroat…
Diketopyrrolopyrrole (DPP)-based terpolymers—P(DPP-TPyT) and P(DPP-T3MTT)—bearing bithiophene donating groups and weak accepting units such as pyridine (Py) or methyl thiophene-3-carboxylate (3MT), in the polymer backbone, were successfully synthesized. Although the two polymers had similar physical and electrochemica…
Abstract A simple one‐step solvothermal synthetic approach has been applied to the rapid fabrication of VOx nanoscrolls (NScs) from vanadium pentoxide and either dodecylamine or octadecylamine as the structure‐directing agent (SDA). By reaction of the appropriate ratio of SDA to vanadium oxide and solvent at 250 °C, a…