Spectroscopic Ca(2+)-indicators are thought to report values of free intracellular Ca(2+) concentration ([Ca(2+)](i)) that may differ from unperturbed values because they add to the buffering capacity of the tissue. To check this for the heart we have synthesized a new (19)F-labelled NMR Ca(2+) indicator, 1, 2-bis-[2-bis(carboxymethyl)amino-4,5-difluorophenoxy]ethane ('4, 5FBAPTA'), with a low ...

In the title compound, C(9)H(10)ClNOS, the dihedral angle between the planar thio-phene ring and 2-chloro-ethane moiety (r.m.s deviations of 0.003 and 0.015 Å, respectively) is 45.79 (6)°. The tetra-hydro-pyridine ring adopts a half-chair conformation. The crystal packing reveals inter-molecular C-H⋯O inter-actions.

1,1’-(Ethane-1,2-diyl)dipyridinium bistribromide (EDPBT) was used as a chemoselective and effective organocatalyst for the silylation of hydroxyl groups as well as desilylation of trimethylsilyl ethers under mild conditions at room temperature with good to excellent yields.

In this paper, we report the first grand canonical Monte Carlo simulation study aiming at characterizing competitive trapping of CH4 and C2H6 molecules into clathrate hydrates under temperature conditions typical those encountered surface Titan. Various compositions fluid in contact with phase have been considered simulations, including pure methane, ethane, mixed fluids made various methane/et...

The title compound, [Co(SO(4))(C(10)H(8)N(2))(2)]·C(2)H(6)O(2), has the Co(2+) ion in a distorted octa-hedral CoN(4)O(2) coordination geometry. A twofold rotation axis passes through the Co and S atoms, and through the mid-point of the C-C bond of the ethane-diol mol-ecule. In the crystal, the [CoSO(4)(C(10)H(8)N(2))(2)] and C(2)H(6)O(2) units are held together by a pair of O-H⋯O hydrogen bonds.

We report measurements of turbulent heat transport in samples of ethane (C2H6) heated from below while the applied temperature difference DeltaT straddled the liquid-vapor coexistence curve T(phi)(P). When the sample top temperature T(t) decreased below T(phi), droplet condensation occurred and the latent heat of vaporization H provided an additional heat-transport mechanism. The effective cond...

An NMR study on ethane and five isotopomers dissolved in the nematic liquid crystal Merck ZLI 1132 is performed. A consistent set of dipolar and quadrupolar couplings is obtained. The dipolar couplings are corrected for harmonic vibrational effects, while the contribution from the torsional motion is incorporated classically. The corrected dipolar couplings cannot be understood in terms of a re...

based on driving force for crystallization of one-component gas hydrate, in this report an expression for the supersaturation for crystallization of multicomponent gas hydrate is derived. expressions for the supersaturation are obtained in isothermal and isobaric regimes. the results obtained are applied to the crystallization of hydrates of mixtures of methane plus ethane and can apply to othe...

The oxidative dehydrogenation (ODH) of ethane on alumina-supported vanadia was investigated with the aim of understanding the effects of lattice oxygen and vanadium oxidation state on the catalyst ODH activity and ethene selectivity. Transient-response experiments were carried out with both a fully oxidized sample of 10 wt% VO(x)/Al(2)O(3) (7 V nm(-2)) and a sample that had been partially reduc...