Materials Literature
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The first part of a corrosion inhibitor model has been developed to be used in a specific Mexican Power Plant. The model takes into account the main operational conditions found in the cooling water, such as major corrosive chemical species, a wide pH range, the performance of a commercial corrosion inhibitor (based o…
relatively hydrophilic polyols. This polymer was prepared from polycaprolactone diol (Capa 225), toluene diisocyanate (TDI), 1,4-butane diol (BDO) as chain extender, and dibutyltin dilaurate catalyst. Grafted polyurethane was prepared with chlorinated poly(ethylene glycol monomethyl ether) (PEGMME) in the presence of…
Abstract. We describe two epithermal telluride-selenide bearing Au-Ag deposits: Prasolovskoe and Ozernovskoe, both located within the Kuril-Kamchatka volcano-plutonic belt. Several rare and unknown Te and Se minerals were found at both deposits. At the Prasolovskoe deposit, various Te-Se minerals, including an unnamed…
Six corn starch-LDPE film blends containing starch in the range 5-40 % by weight, oleic acid as a Lewis catalyst with concentration of either 5 % or 10 %, maleic anhydride as a coupling agent with concentration of either 2 % or 10 % and benzoyl peroxide as free radical initiator with concentration of either 0.1 % or 0…
A commercial Al-Mg-Si alloy (Al 6082) was deformed by Equal-Channel Angular Pressing (ECAP) to produce bulk ultrafine-grained microstructure. The crystallite size distribution and the characteristic parameters of the dislocation structure were investigated by X-ray diffraction profile analysis. It was found that the c…
A natural rubber degrading candidate was isolated from a soil sample from Aswan, Egypt. The strain was able to grow on natural rubber as a sole source for carbon and energy. According to its degradation behavior, it grew adhesively and in direct contact with the rubber substrate and led to disintegration of the materi…
Hydroxy and methoxy perylene quinones are synthesized in an attempt to isolate the essential spectroscopic and biological features of light-induced antiviral agents such as hypericin and hypocrellin. Unlike their naturally occurring counterparts, these synthetic quinones bear the carbonyl, hydroxyl, and methoxy groups…
The present paper describes the grain size refinements of an Al–7.8 mass%Mg alloy by hydrogen heat-treatment of so-called Hydrogenation–Disproportionation–Desorption–Recombination (HDDR) process. Upon hydrogenation of the alloys, a disproportionation reaction occurred in forming of MgH2 embedded in Al matrix phases. I…
Nanorods consisting of a polystyrene core and a poly(4-vinylpyridine) shell produced the self-assembly route of comb-shaped supramolecules exhibit very poor mechanical properties. Adding a sufficient amount of poly(2,6-dimethyl-1,4-diphenyl oxide) introduces entanglements to the PS-core resulting in nanorods with much…
Electrochromic polymer films, employed as display elements, smart windows, and the base material for electrochemical electronic devices, can be addressed solely through ionic transport via an electrolyte, without direct electronic connection as typically employed in the above examples. We present a demonstration of in…
Due to the depletion of the ozone layer, shorter but high energy UV-B rays and longer energy UV-A rays causing known skin aging and recently the formation of skin malignant neoplasm are reaching the surface of earth. The paper deals with the influence of different fabric construction on ultraviolet skin protection exp…
In this work, the effects of neutron irradiations (1021 n/m2 and 1022 n/m2 doses) on photoluminescence of several fused silica grades with different OH contents are studied. Neutron irradiation induces three emission processes: at 4.2 eV with maximum excitation energy around 4.95 eV and halfwidth of 0.27 eV, at 1.9 eV…
A good approximation for the electron self-energy or the electron quasiparticle properties is needed for an accurate calculation of x-ray absorption spectra. The GW approximation (GWA) has been found to be relatively reliable in predicting the quasiparticle energies and lifetimes in a large variety of systems. For sol…
In this paper, two types of detectors, one with a coplanar and the other with a sandwich geometry using an identical CVD diamond film, were fabricated in order to investigate the effects of the film microstructure on the performance of diamond film alpha-particle detectors. An average charge collection efficiency of 4…
The molecular second-order nonlinear optical properties of planar (E)-4-[2-(4-(N-methyl-N-hexadecylaminophenyl)ethenyl]pyridine (L1) and [cis-Ir(CO)2ClL1] and of the significantly twisted new chromophores (E)-4-[(5,6,7,8-tetrahydro-5-isoquinolylidene)methyl]-N-methyl-N-hexadecylaniline (L2) and [cis-Ir(CO)2ClL2] are r…
We studied Langmuir and Langmuir–Blodgett (LB) films of several strong nonlinear optical (NLO) active amphiphilic derivatives of 1,3-indanedione-5,6-dicarboxylic acid. The surface pressure–area (π–A) isotherms at the air–water interface were investigated at different temperatures and pH values. Non-centrosymmetric Z-t…
The structure and morphology of a precipitation product in an Al–10Mg–0.5Ag (mass%) alloy aged isothermally at 240°C have been characterised using transmission electron microscopy and microbeam electron diffraction. A metastable T phase (Mg32(Al, Ag)49, b.c.c., a=1.41 nm) which is identified by the electron microdiffr…
Crevice corrosion was investigated in pure iron exposed to a strong acetate buffer solution. The specimens experienced the potential drop inside the crevice, which resulted in the formation of passive, active, and hydrogen evolution regions. The distribution of hydrogen evolution occurring inside the crevice was mappe…
A series of low-symmetry metal-free tetraazaporphyrin (TAP) derivatives, i.e. monobenzo-substituted (1H2), adjacently dibenzo-substituted (2AdH2), oppositely dibenzo-substituted (2OpH2), and tribenzo-substituted (3H2) TAP derivatives, has been investigated by the combined use of electronic absorption, MCD, and CI calc…
Xerogels containing thiol groups (1.0–2.7 mmol g– 1 ) and having high specific surface areas of 630–970 m 2 g– 1 were obtained by the sol–gel method using a structure-forming agent [1,2-bis(triethoxysilyl)ethane or 1,4-bis(triethoxysilyl)benzene] and a functionalising agent (3-mercaptopropyltrimethoxysilane).