Materials Literature
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Vibration spectra of different carbon‐based materials—soot, natural flake graphite, exfoliated graphite and, single‐walled nanotubes—have been studied by SEIRA (surface enhanced infrared absorption) spectroscopy and compared with FTIR and Raman spectroscopy. The SEIRA method is a more sensitive tool for characterisati…
Two new chromenes, myriachromene and 2,2-dimethyl-6,7-methylenedioxy-2H-chromene, together with ten known compounds including alpha-tocopherylquinone, alpha-tocopherol acetate, diphenyl sulfone, beta-carotene, chondrillasterol, beta-sitosterol, beta-sitostenone, vanillin, and vanillic acid were isolated from the whole…
Two new homologous series of chiral esters derived from Schiff's bases containing a 1,3,4‐thiadiazole unit (series 6 and 7) were synthesized and their liquid crystalline and ferroelectric properties investigated. All the compounds of series 6 exhibit SmC*–SmA dimorphism and the compounds of series 7 exhibit a SmC* pha…
A high-pressure, high-temperature (HPHT) bubble chamber apparatus is used to determine carbon dioxide (CO2) foam stability, interfacial tension (IFT) between HPHT CO2 and surfactant solutions and critical micelle concentration (CMC). Chaser CD1045™ (CD) was used in this study. In this study, changes of temperature fro…
Abstract The thermal expansion coefficients for natural troilite, FeS, Ni-rich pyrrhotite, Fe 0.8 4Ni 0.11 S, and Ni-poor pyrrhotite, Fe 0.87 Ni 0.02 S, were measured during cooling by in situ neutron powder diffraction over the temperature range 873–373 K. Between 873 and 573 K, the mean thermal expansion coefficient…
Conducting polymer composites filled with carbon black (CB) exhibit a positive temperature coefficient (PTC) effect. It is desirable to develop these composites with a low resistivity at room temperature and with a high PTC intensity. We evaluated the dependence of the PTC properties of the composites on the type and…
In order to provide appropriate soil information for the rehabilitation of tropical rainforest ecosystems, we examined the soil morphological, physico-chemical, mineralogical properties and charge characteristics in a degraded mixed dipterocarp forest with three type of vegetation, namely grassland, secondary forest,…
A series of liquid crystalline (LC) polysiloxanes containing diosgeninyl and menthyl groups (from monomers M 1 and M 2, respectively) were synthesized. The chemical structures of the monomers and polymers obtained were confirmed by elemental analysis, Fourier transform infrared spectroscopy, proton NMR and carbon‐13 N…
Les mineraux du groupe du platine provenant du complexe de Konder, ultrabasique, alcalin et zone, situe a l'est du bouclier d'Aldan, en Russie orientale, sont surtout representes par l'isoferroplatine, formeen deux generations, les deux ayant des teneurs en fer allant de 7.5 a 11.5% (poids). Une generation de haute te…
Abstract The frictional behaviors of methyl oleate (MO), methyl palmitate (MP), methyl laurate (ML), and methyl stearate (MSt) as additives in hexadecane have been examined in a boundary lubrication test regime using steel contacts. It was found that the transient attributes of coefficient of friction (COF)‐time spect…
This paper assesses color differences and percent reflectance changes occurring in nine dyed cotton fabrics after different cycles of abrasion for different fabric construction parameters. The fabrics differ from each other in their weft yarn types and counts, weft densities, and weft yarn twists. Warp yarn type and c…
Organic materials for vertical alignment can be used to align liquid crystals horizontally by irradiating an ion beam on the surface under appropriate conditions. Using this technique, we can achieve easily a multidomain alignment for a hybrid-aligned nematic (HAN) cell. We found that a two-domain HAN cell obtained by…
The account highlights an important approach to supramolecular self-assembly via “vector-manipulation at metal centers” ranging from Werner-system to Cotton-system coordination compounds. The approach has been successfully employed in the architecture of container molecules like metal analogues of the bowl-shaped cali…
istorically, diamonds in the pink-to-red color range have been among the most highly prized. In nature, most pink-to-red, brown, and purple colors (and combinations thereof) in diamond have been attributed to the development of defect centers caused by shear stress and plastic deformation. These defects, which gemolog…
Molecular dynamics (MD) simulations were carried out to elucidate the dynamic behavior of water confined in poly(vinyl alcohol), PVA, hydrogels. Model topology is supported by experimental network parameters, and simulation results are compared to an incoherent quasielastic neutron scattering (QENS) investigation carr…
The comparative investigation of structure, morphology, and transport properties of nanoscaled carbon materials (NCM) synthesized by different methods is carried out.
The effects of washing and drying treatments on fibrillation, fuzz, and pill formation of lyocell knitted fabrics are investigated in this study. Pilling ratings of the fabrics after wash (W), dry (D), and wash/dry (WD) treatments are evaluated according to a pilling scale using a microscope. Water retention values an…
Targeted delivery of anticancer drugs is one of the most actively pursued goals in anticancer chemotherapy. A major disadvantage of anticancer drugs is their lack of selectivity for tumour tissue, which causes severe side effects and results in low cure rates. Any strategy by which a cytotoxic drug is targeted to the…
editorial reviewed
Abstract The reticular theory of twinning is extended to include the contribution of different, coexisting sublattices that consist of quasi-restored nodes (cooperative sublattices) and are characterized by a specific superposition index. The overall degree of quasi-restoration of the twin lattice is a function of the…