Materials Literature
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In the title compound, [Cu(C(5)HF(6)O(2))(2)(C(3)H(4)N(2)Se)(2)], the Cu(II) atom (site symmetry ) is coordinated by two O,O'-bidentate 1,1,1,5,5,5-hexa-fluoro-2,4-penta-nedione (hp) ligands and two 4-methyl-1,2,3-selenadiazole mol-ecules, resulting in a slightly distorted trans-CuN(2)O(4) octa-hedral geometry in whic…
Le travail présenté s'intéresse au développement d'une méthodologie d'étude et d'optimisation des opérations de cristallisation en solution, par refroidissement en cuve agitée, de substances d'intérêt pharmaceutique présentant un polymorphisme cristallin. L'opération de cristallisation de référence, servant de support…
ABSTRAK Panas / suhu sebagai beban (load) pada struktur perlu dikaji mengingat daya rusaknya terhadap regangan, modulus elastisitas, dan tegangan pada bahan struktur yang bersangkutan. Kinerja beton ringan sebagai elemen struktur harus diuji secara menyeluruh termasuk aspek kinerjanya pasca kebakaran, mengingat kebaka…
Recently, Gray et al. (AIP Conf. Proc., 845, pp.725-728, 2006) proposed a new experimental technique, called Dynamic-Tensile-Extrusion (DTE), where a spherical projectile is launched against an open conical die. Since the exit diameter of the die is smaller than the sphere diameter, the projectile experiences severe p…
The complete mol-ecule of the title compound, [Nd(2)(C(7)H(5)O(2))(6)(C(12)H(8)N(2))(2)], is generated by a crystallographic inversion center. The two Nd(III) ions are linked by four bridging benzoate ions, with an Nd⋯Nd separation of 4.0360 (2) Å. As well as the bridging ligands, each Nd(III) ion is coordinated by on…
A general method for synthesizing bifunctional hydroxamic acids containing carboxylic acid or amino functionalities is reported. Various products from simple alkyl to complex dendrimer-like structures are described. Such molecules have recently been used in ligand-exchange reactions for the hydrophilic stabilization o…
Recently some progress has been reported in improving the fracture toughness of \nboron suboxide (B6O). This involved the introduction of second phases in it at low \nlevels of doping. This study extends this work through the addition of different \nadditives and through the improvement of densification, by controlled…
Ethylene acrylic elastomers have been successfully used in automotive underhood applications where heat and oil resistance are required. Additionally, ethylene acrylic elastomers offer excellent compressive stress relaxation, dynamic fatigue resistance, vibration dampening, and resistance to acid condensates, making i…
A review of pressure-sensitive adhesives (PSAs) and PSA tapes is presented. Typical constructions of PSA tapes are discussed along with a short section on the release surfaces used in conjunction with most PSAs. A discussion of the physical properties governing PSA performance is provided with emphasis on the effect o…
De par leur bonne tenue à l’impact, les matériaux composites tissés sont de bons candidats pour la conception de pièces aéronautiques. Toutefois, le manque de confiance dans les modèles se traduit par de lourdes campagnes expérimentales. L’augmentation de la part de simulation numérique et donc la réduction des coûts…
Received 23 November 2009DOI:https://doi.org/10.1103/PhysRevLett.104.049902©2010 American Physical Society
The hydro-thermally prepared title compound, [Ni(C(8)H(7)N(3))(3)](2)[PMo(12)O(40)]·6H(2)O, is a member of the isotypic series [(M(C(8)H(7)N(3))(3)](2)[PMo(12)O(40)]·6H(2)O where M is Mn, Cd, and Fe. The Ni(2+) cation is in a distorted octa-hedral environment, coordinated by six N atoms from three chelating 3-(2-pyrid…
importancia esta relacionado a su corrosión p.ej.: el crecimiento de óxidos y de depósitos sobre éstos por su interacción con el refrigerante. La microscopía electrónica de barrido y el análisis elemental por EDS son herramientas muy útiles para la caracterización, análisis de composición y medición de espesores de de…
Las aleaciones Zinc Aluminio (ZA) son hoy en dia utilizadas en los procesos de galvanizado por inmersion en caliente a fin de producir recubrimientos para la proteccion a la corrosion de estructuras metalicas. El objetivo de esta investigacion es evaluar la microestructura de recubrimientos ZA depositados sobre un ace…
In the title compound, [Hg(CN)(2)(C(6)H(13)N)(2)], the Hg(II) ion adopts an extremely distorted HgC(2)N(2) tetra-hedral coordination. The crystal packing is influenced by weak N-H⋯N hydrogen bonds between the amino groups and the cyanide N atoms, resulting in chains of mol-ecules propagating in [110]. Both cyclo-hexyl…
The asymmetric unit of the title compound, [Mn(2)(C(20)H(12)Br(2)N(2)O(2))(2)Cl(2)]·2C(3)H(7)NO, contains one half of a centrosymmetric dinuclear Mn(III) complex and an N,N-dimethyl-formamide solvent mol-ecule. In the complex, the two Mn(III) ions are bridged by two O atoms from two symmetry-related N,N'-bis-(5-bromo-…
Chemical preparation, crystal structure, thermal analysis, and spectroscopic investigations are given for a new noncentrosymmetric organic cation dihydrogenmonophosphate [2-CH2NH3C5H4N]H2PO4 (abbreviated as 2AMPDP). This compound crystallizes in the orthorhombic space group Pca21 with the following unit cell parameter…
Poly(1,1′-bi-2-naphthylidene toluene-2,4-disulfonate) (PBNTDS) was synthesized by the interfacial polycondensation of 1,1′-bi-2-naphthol and toluene-2,4-disulfonyl chloride using water:1,2-dichloroethane as an interphase, alkali as an acid acceptor, and cetyl trimethyl ammonium bromide as an emulsifier. PBNTDS is high…
The determination of rate constants and isotherm parameters by the inverse method is described for a first order reversible reaction. The application of the principle of microscopic reversibility is discussed for competitive isotherms. Experimental data are obtained from the enantiomerization of oxazepam.
New metal complexes derived from the reaction of N-[(phenylamino)thioxomethyl] hydrazino carbonyl methyl pyridinium chloride (H2L; PTHMPC) with some metal salts of the general formula MX2 [(X = Cl− and/or CH3COO−; M = Cd(II), UO2(II), Mn(II) and Zr(IV)] were synthesized and characterized by elemental analyses, spectra…