Topic
Valency
About: Valency is a research topic. Over the lifetime, 1632 publications have been published within this topic receiving 26141 citations.
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TL;DR: In this article , the valencies and local coordination structures of Fe in the Kasama celadon glaze specimens were evaluated by X-ray absorption fine structure measurements, and the results revealed that the yellow and light-blue colors originated from FeO4 tetrahedra with Fe in +3 and +2 oxidation states.
Abstract: To reveal the origin of coloration in Kasama celadon glazes, the valencies and local coordination structures of Fe in the celadon glaze specimens were evaluated by X-ray absorption fine structure measurements. Specimens were fabricated by a heating-cooling process [oxidation-oxidation (OFOF), reduction–oxidation (RFOF), or reduction-reduction (RFRF)], and exhibited two colors (yellow: OFOF specimens, light blue: RFOF and RFRF specimens). Pre-edge features of their X-ray absorption near edge structure spectra were measured to investigate the valency and local coordination structures of Fe in each specimen. The yellow and light-blue colors originated from FeO4 tetrahedra with Fe in the +3 and +2 oxidation states, respectively.
1 citations
08 Sep 2008
TL;DR: This paper presents some steps in manually building a verb valency lexicon for Romanian and exemplifies the manner in which the information is represented in a lexicon entry.
Abstract: This paper presents some steps in manually building a verb valency lexicon for Romanian. We refer to some major previous works by focusing on their information representation. We select that information for different stages of our project and we show the conceptual problems encountered during the first phase. Finally we present the gradually building procedure of the lexicon and we exemplify the manner in which the information is represented in a lexicon entry.
Patent•
25 Nov 1992
TL;DR: In this paper, a process for producing a nitrile, which comprises subjecting an alkane and ammonia in the gaseous state to catalytic oxidation in the presence of an oxide of empirical formula: MoVbTecNbdXxOn (1), was described.
Abstract: A process for producing a nitrile, which comprises subjecting an alkane and ammonia in the gaseous state to catalytic oxidation in the presence of an oxide of empirical formula: MoVbTecNbdXxOn (1) wherein: X is at least one of Mg, Ca, Sr, Ba, Al, Ga, Tl, In, Ti, Zr, Hf, Ta, Cr, Mn, W, Fe, Ru, Co, Rh, Ni, Pd, Pt, Zn, Sn, Pb, As, Sb, Bi, La and Ce; b is from 0.01 to 1.0; c is from 0.01 to 1.0; d is from 0 to 1.0; x is from 0.0005 to 1.0; and n is a number such that the total valency of the metal elements is satisfied.
Posted Content•
TL;DR: Given integers k and m, a graph of valency and an oriented digraph of out-valency such that both admit blocks of imprimitivity of size m are constructed.
Abstract: Given integers $k$ and $m$, we construct a $G$-arc-transitive graph of valency $k$ and an $L$-arc-transitive oriented digraph of out-valency $k$ such that $G$ and $L$ both admit blocks of imprimitivity of size $m$.
01 Jan 1964