Materials Literature
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Journal Article SYMMETRIC GROUP BLOCKS OF DEFECT TWO Get access JOANNA SCOPES JOANNA SCOPES 117 Limes Road Hardwick Cambridge CB37XU Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Mathematics, Volume 46, Issue 2, June 1995, Pages 201–234, https://doi.org/10.1093/qmath…
29 Si NMR experiments on C-S-H formed during the two kinetic steps of C 3 S hydration reveal the presence of Q 1 and Q 2 signals. For a very low percentage of the reaction, a Q 0 signal is also observed. However, this signal is not believed to be induced by C-S-H and has been attributed to C 3 S,h (C 3 S superficially…
Sintering behavior of SiC with oxide additives is controlled by SiO2 content and particle size of starting powders at temperatures below 1900°C and chemical reactions, which evolve gaseous products (possibly SiO, Al2O, CO), between SiC, free carbon, SiO2 on SiC and oxide additives at temperatures above 1900°C.The high…
The binary system PbO–BiVO4 exhibits two new phases, Pb4BiVO8 and Pb2BiVO6. They both melt congruently at 780 °C. They have been identified by single-crystal and powder X-ray diffraction. Pb4BiVO8 crystallizes with a triclinic cell, a= 6.221(2)Å, b= 7.603(5)Å, c= 10.457(4)Å, α= 100.40(3)°, β= 102.18(2)°, γ= 90.03(3)°…
A critical but non exhaustive review of the aqueous corrosion fatigue mechanisms is proposed with a particular emphasis on the corrosion-deformation interactions, The limits of the classical approaches of corrosion fatigue crack initiation and propagation predictions from the electrochemical point of view are pointed…
Novel steroidal glycosides 2-4, 6-11, 13-19 and 20 were isolated from the roots of Cynanchum caudatum M. (Asclepiadaceae). The structures of these steroidal glycosides were determined on the basis of spectral and chemical evidence. All of these glycosides contain 2, 6-dideoxyhexopyranoses as component sugars, and thei…
The phase resolved partial discharge detection technique (or 'PD pattern recording technique') is applicable to field measurements, particularly if combined with disturbance rejection techniques and non-conventional pick-up circuits. Electromagnetic disturbances can be eliminated by filtering in the time dom…
A wide range of conjugated organic compounds undergo anodic electropolymerisation to produce polymers of high conductivity. However, electrooxidation does not always result in the formation of electroactive materials, since some reactions produce insulating films or soluble oligomers. Density functional theory (DFT) h…
The new segmental ligand L2, which possesses a terminal N,N′-diethylcarboxamido group, reacts with EuIII and ZnII to give the highly stable and strongly luminescent self-assembled helical heterodinuclear d–f complex [EuZn(L2)3]5+.
Collagen-based materials can be designed for use as scaffolds for connective tissue reconstruction. The goal of the present study was to evaluate the behavior of collagen materials as well as cell and tissue reactions after the conjugation of activated polyethylene glycols (PEGs) with collagen. It is known that protei…
Plasma polymerization of ethylene and ammonia gas mixtures is used to obtain uniform polymer coatings on the surface of AS4 graphite fibers. The polymer deposition rates were determined for processing parameters such as composition of the monomer mix, monomer flow rate, chamber pressure, and power input of the radio f…
The adsorption of NO, NO2 and N2O at various temperatures on mono- and multi-layered V2O5/ZrO2 catalysts prepared by the gas-phase method has been investigated by IR spectroscopy. On the reduced samples of both mono- and multi-layer catalysts, NO is adsorbed giving mono- and di-nitrosylic species. On the oxidized form…
The gene encoding the enzyme citrate synthase has been cloned and sequenced from the hyperthermophilic Archaeon Pyrococcus furiosus, and the derived amino acid sequence has been phylogenetically compared with citrate synthases from archaeal, bacterial and eukaryal organisms. The gene has been over-expressed in Escheri…
The evolution of the phases in galvanneal coatings on IF and IFP steel sheets is studied by combining optical microscopy (OM), scanning electron microscopy (SEM) with X-ray microanalysis (EDS) and transmission electron microscopy (TEM). The early stage of galvannealing is dominated by the formation of intermetallic co…
The crystal structure of a new dihydrogendecavanadate(V) of n-hexylammonium has been determined by means of X-ray diffraction data. Empirical bond length/bond number calculations have located the protonation sites in two triply-linked oxygen atoms which reinforce theoretical results of relative basicities of the oxyge…
TiO2–Al2O3 mixed oxides have been prepared by cohydrolysis of Ti4+ and Al3+ isopropoxides. Textural and acid–base properties were investigated using nitrogen physisorption, adsorption of probe molecules followed by FTIR spectroscopy, and test-reactions. Catalysts were found to exhibit high surface areas and pore volum…
Multiple oxide titanates have been prepared via the sol-gel method by the reaction of an alcoholic solution of titanium n-butoxide, Ti(OC4H9)4, with nitrate solutions, M(NO3)2(M = Mg, Ca, Sr, Ba), at room temperature. The amorphous gels so obtained under acidic conditions were calcined at temperatures between 700 and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExploring the Limits of the Zintl Concept for the A14MPn11 Structure Type with M = Zn, CdDianna M. Young, Charles C. Torardi, Marilyn M. Olmstead, and Susan M. KauzlarichCite this: Chem. Mater. 1995, 7, 1, 93–101Publication Date (Print):January 1, 1995Publication History Pub…
A cyclic trimeric porphyrin host has been synthesised with alkyne–platinum–alkyne linkages; binding of the octahedral aluminium tris[3-(4-pyridyl)acetylacetonate] guest ligand into the complementary cavity of the host induces an asymmetry which is readily detected by NMR spectroscopy. The ligand complementarity unambi…
Syntheses are described for two octatetrayne-linked cyclic porphyrin oligomers with extremely spacious cavities. These hosts bind strongly to complementary multidentate guests. Thus, the octatetrayne-linked dimer binds bifunctional ligand bis(4-pyridyl)ethyne with an affinity of 7 × 106 dm3 mol–1, and the trimer binds…