Scheelite-type NaNd[MoO(4)](2) contains one crystallographic position (site symmetry [Formula: see text]) for the large cations, which is mixed-occupied by Na(+) and Nd(3+) cations in a 1:1 molar ratio. Thus, both are surrounded by eight O atoms in the shape of a trigonal dodeca-hedron. Furthermore, the structure consists of crystallographically unique [MoO(4)](2-) units (site symmetry [Formula...

Singlet-triplet adiabatic (AES-T) and well-to-well (WWES-T) excitation energies of variously substituted phenyl cations were calculated at the G4 level of theory. The G4 ES-T estimates range from 19 to 40 kJ/mol higher than prior density functional theory based predictions for these cations, and suggest that ES-T and ground state multiplicity structure-property trends for phenyl cations previou...

In the title compound, C(7)H(7)N(2) (+)·NO(3) (-), all atoms except the methyl H atoms lie on a crystallographic mirror plane. The inter-layer distance, including that between aligned N atoms from alternating cations and anions in adjacent layers, is exceptionally short at 3.055 (1) Å. Two-dimensional C-H⋯O hydrogen-bonded networks link cations to anions, while C-H⋯N inter-actions link cations ...

The IFAD VDM SL Toolbox is a collection of tools for formal speci cations development using the latest version of the VDM SL standard In addition to the full language it also supports a module based structur ing mechanism for large speci cations The Toolbox features extensive semantics checking documentation support test coverage analysis and debugging support We have focused on supporting real...

Reactions of heavy water, D(2)O, have been measured with 46 atomic metal cations at room temperature in a helium bath gas at 0.35 Torr using an inductively coupled plasma/selected ion flow tube tandem mass spectrometer. The atomic cations were produced at ca. 5500 K in an ICP source and were allowed to decay radiatively and thermalize by collisions with Ar and He atoms prior to reaction. Rate c...

It was previously reported that bacteriophage T4 contains the polyamines putrescine, NH2(CH2)$;IH2, and spermidine, NHQ(CH&NH(CH&NH2, in amounts sufficient to neutralize about half of the viral deoxyribonucleic acid (1). The putrescine and spermidine in the phage were found to be derived from the large amount of these polyamines normally present in the host bacterium, Escherichia coli B. It was...

Ce2[MoO5][MoO4] crystallizes monoclinically in space group P21/c (a = 2241.98(9), b = 712.95(3), c = 2044.19(8) pm, β = 116.936(2)◦ , Z = 16). Besides eight crystallographically different Ce3+ cations with coordination numbers ranging from seven plus one to ten, its structure contains two isolated oxomolybdate(VI) species, namely [MoO4]2− tetrahedra and [MoO5]4− trigonal bipyramids and square p...

|A speciication language used in the context of an eeective theorem prover can provide novel features that enhance precision and expressiveness. In particular, type-checking for the language can exploit the services of the theorem prover. We describe a feature called \predicate subtyping" that uses this capability and illustrate its utility as mechanized in PVS.

K+ is a competitive inhibitor of the uptake of the other alkali metal cations by yeast. Rb+ is a competitive inhibitor of K+ uptake, but Li+, Na+, and Cs+ act like H+. At relatively low concentrations they behave as apparent noncompetitive inhibitors of K+ transport, but the inhibition is incomplete. At higher concentrations they inhibit the remaining K+ transport competitively. Ca++ and Mg++ i...

Iron cobaltite powders CoxFe3ÿxO4 (1rxr2.46) were synthesized with compositions in between the cobalt ferrite CoFe2O4 and Co2.46Fe0.54O4. The cationic distribution of pure spinel phases was determined by Mössbauer spectroscopy: as Co content increases in the spinel oxide, Co cations replace Fe cations in the octahedral sites and Co cations migrate from octahedral to tetrahedral sites. Saturatio...