Materials Literature
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Neutron protein crystallography is advantageous in determining protonation states of target proteins to provide a more precise understanding of the enzymatic mechanism and accurate structure-based drug design. However, a major obstacle is the growth of large protein crystals needed to compensate for the weak flux of t…
A comprehensive theoretical study about the structural and electronic molecular properties of the optically active regioregular poly[( R )-3-(4-(4-ethyl-2-oxazolin-2-yl)phenyl)thiophene] and its model oligomers has been developed with use of quantum mechanical calculations. Results show two stable arrangements for the…
The lead tellurite nanobelts have been first synthesized in the composite molten salts (KNO3/LiNO3) method, which is cost-effective, one-step, easy to control, and performed at low-temperature and in ambient atmosphere. Scanning electron microscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelect…
Fil: Tagliazucchi, Mario Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química…
This paper deals with the self-assembly of the 1:1 complex of two different amphiphiles, namely, a glucosyl-salicyl-imino conjugate (L) and phenylalanine (Phe), forming nanofibers over a period of time through pi...pi interactions. Significant enhancement observed in the fluorescence intensity of L at approximately 42…
Abstract A new water‐soluble amphoteric copolymer (PAC) was synthesized and evaluated as a dispersion agent for cement particles. PAC was prepared from acrylamide and 2‐(3‐carboxyacryloyloxy)‐ N ‐(carboxymethyl)‐ N,N ‐dimethyl ethanaminium (CAC) through free‐radical polymerization. The structure of the prepared polyme…
Biosynthesis of the biodegradable polymers polyhydroxyalkanotes (PHAs) are studied extensively in wild type and genetically modified prokaryotic cells, however the content and structure of PHA in wild type yeasts are not well documented. The purpose of this study was to screen forty yeast isolates collected from diffe…
The effect of primary α content on creep and creep crack growth behaviour of a near α-Ti alloy has been investigated at 600°C. The alloy was heat treated at different temperatures so as to obtain different volume fractions of equiaxed primary α in the range from 5 to 40%. Constant load creep tests were carried out at…
Abstract New electrically conducting copolymers based on biphenyl and thiophene in a form of film were synthesized by electropolymerization using potentiostatic conditions and the corresponding homopolymers, polyphenylenes, and polythiophenes, for comparison reasons. Different values of applied potential were used, to…
The dynamics of disclination defect lines in a nematic liquid crystal are measured experimentally and considered theoretically. An optical trap is used to deform the line, enabling the previously unexplored regime of large deformation to be accessed. The relaxation follows a linear decay at large amplitude, crossing o…
Thermodynamic properties, such as entropy among others, have been shown to correlate well with formula volume, thus permitting prediction of these properties on the basis of chemical formula and density alone, with no structural detail required. We here extend these studies to the thermoelastic property of isothermal…
Abstract Cellulose extracted from waste newspaper was methylated using dimethylsulfate to produce methylcellulose with degree of substitution of 1.46 ± 0.06. This material was characterized by FTIR and DSC. An aqueous dispersion of methylcellulose was used to produce mortars of Portland cement (CPV‐ARI). The results s…
Thermoanalytical investigations TGA/DTG/DSC of polyamide–imide enamel after thermal ageing have been presented. The lifetimes at 260, 270, 280, 290, 300 °C were determined. The thermograms of the enamels after attaining of their lifetimes much depend on the ageing temperature. The temperatures of 5% loss of mass that…
The article describes a modified method of polyaniline synthesis. The classical oxidizer—aqueous solution of hydrogen peroxide was replaced by different solid state hydrogen peroxide complexes, what helped keep constant temperature of the reaction mixture. The highest yield of the polymerization was obtained using ure…
Abstract Polypropylene (PP)/multiwalled carbon nanotube (MWNT) composites were prepared with an environmentally benign processes. The surface functionalization of the MWNTs was performed with water as a solvent, and the functionalized MWNTs were mixed with PP to form composites with a melt process. The effects of the…
The article presents the results of testing thermal properties and combustibility of butadieneacrylonitrile rubber with 18% contents of bounded acrylonitrile, NBR 18. Two types of silica, Zeosil 175C and Ultrasil VN-3, with different specific surfaces were used as filler. Zeosil 175C and Ultrasil VN-3 were modified vi…
PP/PS interpolymer foam was tested in the rod extrusion process while using chemical blowing agents (CBA) and carbon dioxide physical blowing agent (PBA), respectively. Foam density decreases as blowing agent level increases. After it dips to a minimum, the foam density curve goes up. Although both CBA and PBA show th…
Abstract Polymer dispersed liquid crystal (PDLC) films are fabricated using E7 liquid crystals, tetraethylene glycol diacrylate (TeGDA) crosslinking agent, and 0–66.49 mol % 2‐hydroxy ethyl methacrylate (HEMA). The effects of different levels of HEMA addition on the microstructure and electro‐optical properties of the…
Uniform magnetic poly(styrene-co-2-hydroxyethyl methacrylate) (PST-HEMA) microspheres were fabricated by a novel route combining premix membrane emulsification of double emulsion and an in situ magnetization technique. The fabrication involved, first, the preparation of uniform double W/O/W emulsions with ferrous ferr…
Glasses with the composition 52.6 SiO 2 ·18.7 Al 2 O 3 ·14.3 MgO·7.7 TiO 2 ·4.7 B 2 O 3 ·2.0 CaO were crystallized using electrochemically induced nucleation at temperatures from 1200 to 1400 °C. The crystals grew with their fastest growing axis pointing away from the surface of the electrode. At the cathode, Ti 4+ is…