Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The influence of the catalyst/initiator system and polymerization conditions on the microstructure and physical properties of copolymers of equimolar amounts of 1,3‐trimethylene carbonate (TMC) and ε ‐caprolactone (CL) was studied. Statistical copolymers were prepared in the presence of stannous octoate (SnOc…
Abstract Novel discotic liquid crystalline bis[2,3,9,10,16,17,23,24-octakis(3,4-dialkoxyphenoxy)phthalocyaninato]lutetium(III) complexes, {[(CnO)2PhO]8Pc}2Lu (n = 12: 5a and n = 13: 5b), were synthesized. Their mesomorphic properties were investigated using polarization microscopy, DSC, and temperature-dependent X-ray…
Ideal pyroxenes are hypothetical structures based on ideal closest-packed arrangements of O anions. They are modeled after observed pyroxene structures and have the general formula M2M1T2O6, where M2 and M1 represent octahedrally coordinated cations, and T represents tetrahedrally coordinated cations. An algorithm has…
Modulated Scanning Calorimetry shows the non-reversing heat flow near T g to display a sharply defined global minimum in the 0.28 < x < 0.40 range, identified with the self-organized phase (SOP) of titled glasses. 31 P NMR, Raman scattering and constraint counting algorithms suggest this phase to consist of two distin…
Abstract The hydrothermal reaction of V 2 O 5 , H 2 C 2 O 4 ·2H 2 O, KOH, en and NiCl 2 ·6H 2 O yields a new three‐dimensional open‐framework solid. The extended structure consists of a three‐dimensional network of [V 16 O 38 Cl] 8− cages, with each cage connected to six other neighboring units through [Ni(en) 2 ] 2+…
Antimicrobial films may provide an effective way to control food-borne pathogens and spoilage microorganisms to thus enhance food safety and decrease product spoilage. Antimicrobial films can be produced by incorporation of chemical preservatives or antimicrobial agents into a plastic film. The agents can then diffuse…
Abstract Si3N4‐Al2O3‐Y2O3, Si3N4‐TiN and Si3N4‐AIN‐Al2O3‐Y2O3 (β‐sialon) nanopowders with the specific surface area of 60–70 m2/g and average particle size of 30–50 nm have been prepared by plasmachemical synthesis. By means of the hot pressing method at 1850°C compact materials with fine‐grained structure were prepar…
Nanocrystallization of steels by ball milling and by a ball drop test was compared using specimens with different carbon content and starting microstructures. The nanocrystalline structure produced by ball milling and ball drop test has essentially the same characteristics; nano-sized ferrite grains, dissolution of ce…
Abstract This paper addresses the phenomenology of strand interaction in biaxial non‐embedded braided textile structures under uniaxial tension. The specific interest in the development of new braided textile structures is a result of the shortcomings of current rope, belt, and cable performance under large strain con…
Corrosion inhibition studies of mild steel in 1.0 N sulphuric acid have been performed at 25°C using substituted thiobiurets and their molybdenum and tungsten complexes as inhibitors. All the inhibitors have been found toinhibit the corrosion process by getting adsorbed on the metal surface. Among the studied thiobiur…
L-Pyroglutamate (PGA) is naturally occurring from L-glutamate solution with accelerated formation rate under high temperature and low pH. Even though PGA has been identified as a neurotoxic agent on brain cells, the effect of PGA on the growth of microorganisms is rarely known. Here various kinds of microorganisms dif…
Abstract Based on the primary principles of biomineralization, CaCO 3 similar to that in biominerals was synthesized through biomimetic synthesis under the self‐assembly of sodium acrylate. In our experiment, the formation of the calcium carbonate and the polymerization of sodium acrylate took place simultaneously thr…
AbstractThe development of thermal stress during the diffusion bonding of Al2O3 ceramic to aluminium is analysed via the finite element analysis method using a commercial software package, namely, MARC/MENTAL. Before diffusion bonding, a 0.2 mm copper layer is sintered onto the ceramic. The results show that shear str…
Three banana-shaped achiral compounds, derivatives of 4,6-dichloro-1,3-phenylene bis-[4-(4-n-octyloxyphenyliminomethyl) benzoate], were synthesized by varying the substituent (X = H, F and Cl). Their mesomorphic properties were investigated by differential scanning calorimetry, polarizing optical microscopy, and X-ray…
Acylhomoserine lactone (AHL) synthases act as chemical communication signals or pheromones in Gram-negative bacteria and regulate diverse physiological events in a cell density-dependent manner. The recent crystal structure determination of EsaI, a key enzyme in this pathway, shows that the AHL synthase superfamily me…
Abstract The improved fire performance of polyamide‐6 clay nanocomposite compared with polyamide‐6 are correlated with their degradation kinetic parameters. Moreover substituting polyamide‐6 by polyamide‐6 clay nanocomposite in an intumescent blend enables to improve its fire properties. Once again, the improved fire…
A new method of porous silicon fabrication is suggested which uses as a current source the potential difference arising between the silicon wafer and the platinum counter electrode immersed in an electrolyte solution. Addition of hydrogen peroxide to HF/ethanol electrolyte enables control over the current density in t…
In this paper, we analyze the consequences of Sih’s fracture criterion in a material which behaves according to the Cosserat-type model with free or constrained rotations. Both models are considered and for each of them the first and the second fracture mode is analyzed. To apply Sih’s criterion, the singular part of…
Abstract Dynamic viscoelastic properties and dynamic mechanical properties of blends of acrylate rubber (ACM), fluoroelastomer and polyacrylate plastics have been investigated with a rheometer (ARES RDA III) at a frequency (ω) range of 0.1 to 100 rad.s −1 . The analysis of thermorheological properties revealed that th…
Heyrovskyite, a rare Pb-Bi sulfosalt, was found around a fumarole of ca. 500 °C at the La Fossa crater, Vulcano Island, Italy. The mineral occurs in the thin sulfosalt-rich crust covering the brecciated altered rocks of fumaroles, mainly admixed with selenian varieties of lillianite and cannizzarite, with subordinate…