Materials Literature
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Azobenzene moieties with 3,3‘-dihexyloxy-2,2‘-dimethyl and 4,4‘-dihexyloxy substituents were attached to backbones of polymethacrylates at low contents (7 mol %) to investigate the effect of positional isomerism of the substituents on photochemical and thermal isomerization behavior and the ability to perform the surf…
The in situ copolymerization behaviour of zinc dimethacrylate (ZMA) and 2-(N-ethylperfluoro-octanesulphonamido)ethyl acrylate (RfSA) in hydrogenated nitrile–butadiene rubber (HNBR) initiated with di-tert-butyl peroxy di-isopropylbenzene (PO) was studied by transmission electron microscopy, dynamic mechanical analysis,…
The objective was to obtain the polysaccharide fraction present in the extracted polymeric matrix of a biofilm by differential precipitation of the protein content. This was tried by pH adjustment and by addition of trichloroacetic acid (TCA). The best yield of protein precipitation was with 20% (w/v) TCA, with more t…
Polyaniline grafted wool fiber was prepared by a chemical polymerization method using potassium peroxydisulfate (PDS) as a lone initiator under optimized conditions. The simultaneous homopolymer formed, as well as physisorbed polyaniline (PANI) onto wool fiber, were removed by a systematic procedure. The isolation pro…
Electronic and MCD (magnetic circular dichroism) spectra of dilutetium(III) tris(phthalocyanate), Lu 2 (Pc) 3 (Pc = phthalocyanine), its one-electron oxidation product [Lu 2 (Pc) 3 ] +, and its two-electron oxidation product [Lu 2 (Pc) 3 ] 2+ are reported. Lu 2 (Pc) 3 was prepared by a new synthetic route in which PcL…
Abstract A new technique utilizing Raman microscopy and Fourier transform infrared (FTIR) microsacopy is described. This technique uses thin films of oriented clay aggregates on glass slides suitable also for X-ray diffraction (XRD). Raman microscopy proved the most useful technique providing both better resolution of…
The magnetocaloric effect in La1.6Ca1.4Mn2O7 polycrystal with the layered Sr3Ti2O7-type perovskite structure has been studied. It is found that the magnetic entropy change of La1.6Ca1.4Mn2O7 is comparable to that of Gd, but smaller and more broadened than that of La0.8Ca0.2MnO3.
In this study, the electric‐field‐induced strain of PT‐PZ‐PMN ceramics was investigated in view of actuator applications under relatively high electric fields. The electric‐field‐induced strain was maximum at the composition x = 39.5, where x denotes the PbTiO 3 (PT) content in the formula x PbTiO 3 ·25PbZrO 3 ·(75 ‐…
A new synthetic method of forming the gamma‐phase of aluminum oxynitride (alon) has been proposed. alon has been successfully synthesized by the DC nitrogen plasma arc using alpha‐Al 2 O 3 and AlN as starting materials. Alon rapidly forms in a liquid state under thermal plasma. The obtained lattice parameter of alon h…
Reaction of 3,5-di-tert-butylcatechol and aqueous ammonia with boron, aluminum, gallium, or strontium chloride, or with calcium or barium acetate produce, under oxidizing conditions, neutral complexes of stoichiometric formulae ML (M = BCl), ML2, [M = Al (2), Ga (3), Ca (4), and Ba (5)], and ML3H [M = Sr (6)] [L = dif…
In this work, we synthesized a new diamine containing a pendant adamantane group and a flexible aryl ether unit, 2,2-bis[4-(4-aminophenoxy)phenyl]adamantane (BAPA) in three steps starting from 2-adamantanone. A series of new polyamides having inherent viscosities of 0.72–0.90 dL·g–1 were prepared by direct polycondens…
Abstract Thermoplastic polyurethane elastomers (TPU) and polyethylene (PE) form immiscible blends with an extremely low compatibility. In order to improve the dispersion, stability, and properties of these blends, polyethylene was grafted with maleic anhydride (PE‐g‐MA). Subsequently, it was blended with a commercial…
A first-principles method based on the local-density approximation using discrete variational clusters has been used to study the electronic structure of bcc metals, Li, Na, K, V, Nb, Ta, Cr, Mo, and W. The binding energy of these metals was calculated, and the relationship between the binding energy and the volume of…
Laser-ablated Rh atoms react to give RhO, the linear dioxide ORhO, the side-bound dioxygen adduct (O 2 )RhO 2, and several ORhO(O 2 ) complexes. In addition, a large number of Rh x (O 2 ) y complexes are observed, but only Rh(O 2 ) and (O 2 )Rh(O 2 ) can be identified with the support of DFT frequency calculations. Th…
The main objective of this investigation is to improve the photoluminescent performance of existing phosphors by adding a new co‐dopant. The candidate co‐dopants adopted in the present investigation are confined to substituents for the Zn site. In this context, the co‐doping effect of Mg and/or Cr upon emission intens…
A single-crystal X-ray diffraction study of synthetic pseuowollastonite (CaSiO 3 ) shows that this crystal has monoclinic C2/c symmetry, with a = 6.8394(5), b = 11.8704(9), c = 19.6313(7) Å, P = 90.667(6)°, and V= 1593.7(2) Å 3 . Basic features of the C2/c structure are similar to those previously determined with a C1…
Abstract The use of disodium peroxodisulphate combined with a neutral buffer is a new method for the efficient removal of organic matter from clay-bearing sediments. The effects of this oxidation procedure on mineral structure were investigated by treatment of different standard clay minerals (kaolinite ‘china clay’,…
Scytalone dehydratase is a molecular target of inhibitor design efforts aimed at preventing the fungal disease caused by Magnaporthe grisea. A method for cocrystallization of enzyme with inhibitors at neutral pH has produced several crystal structures of enzyme-inhibitor complexes at resolutions ranging from 1.5 to 2.…
Abstract Electronic spectra of the active π-electronic dianion of 1,4-benzoquinone and its hydrogen-bonded complex with CH3OH, generated at sequential electroreduction steps, have been discussed from the points of view of the observation techniques and n–σ charge-transfer interaction of the dianion with a weak hydroge…
${\mathrm{CuCr}}_{2}{\mathrm{Se}}_{4}$ is one of the few compounds that exhibits a magneto-optical (MO) Kerr angle of greater than one degree at room temperature. To better understand the origin of this effect, the MO properties of ferromagnetic ${\mathrm{CuCr}}_{2}{X}_{4} (X=\mathrm{S},\mathrm{}\mathrm{S}\mathrm{e},\…