Combining Multiscale Approaches for the Structure Determination of an Iron Layered Oxysulfate: SrFeO(SO).

The new iron layered oxysulfate SrFeO(SO) has been prepared by a solid-state reaction in closed ampules into the form of ceramics and single crystals. Its atomic structure has been solved by means of spectroscopy, diffraction techniques, and high-resolution electron microscopy. SrFeO(SO) is a layered structure that derives from the Ruddelsden-Popper (RP) phases with the layer stacking sequence SrO/SrFeO/SrFe(SO)O/SrFeO.

Nanometer scale tomographic investigation of fine scale precipitates in a CuFeNi granular system by three-dimensional field ion microscopy.

The microstructure of Cu80Fe10Ni10 (at. %) granular ribbons was investigated by means of three-dimensional field ion microscopy (3D FIM). This ribbon is composed of magnetic precipitates embedded in a nonmagnetic matrix.

Influence of structural parameters on magnetoresistive properties of CuFeNi melt spun ribbons.

The microstructure of Cu(80)Fe(10)Ni(10) (at%) granular ribbon was investigated by means of atom probe tomography (APT). A granular system is composed of magnetic precipitates embedded in a non-magnetic matrix. In this ribbon, the magnetic precipitates have a diameter smaller than 5nm in the as-spun state, and their crystallographic structure is very similar to the one of the matrix, which makes it difficult to characterize them using conventional techniques.

Ultrashort pulse propagation through a strongly scattering medium: simulation and experiments.

Forward light scattering of femtosecond pulses through strongly scattering media is investigated experimentally and numerically. Computations are based on a semi-Monte Carlo method including polarization effects when experiments depend on a Ti:sapphire regenerative amplifier (100 fs, 1 kHz, 1 mJ@ 800 nm). The temporal separation between ballistic light and scattered light is exhibited and used to perform optical depth measurements up to 22 (transmission factor of approximately 10(-10)).

Standard deviations of composition measurements in atom probe analyses. Part I conventional 1D atom probe.

Atom probe is a very powerful instrument to measure concentrations on a sub nanometric scale [M.K. Miller, G.

Standard deviations of composition measurements in atom probe analyses-Part II: 3D atom probe.

In a companion paper [F. Danoix, G. Grancher, A.

Effect of vorticity on second- and third-order statistics of passive scalar gradients.

The influence of vorticity on second- and third-order moments of the spatial derivatives of a forced, passive scalar field has been studied in the framework of a simplified problem; the analysis is restricted to dominating rotation and molecular diffusion is represented by a linear model. The results reveal that, in the case of a passive scalar experiencing forcing in an isotropic medium, both vorticity and diffusion counteract anisotropy imposed on the scalar field. Anisotropy at the level of second-order moments appears to be destroyed essentially by the action of vorticity.

Influence of Ar(2)+ in an argon collisional-radiative model.

A nonlinear time-dependent collisional-radiative model for recombining argon is presented. Reactions involving Ar(2)+ are taken into account and their influence is discussed. It is shown that Ar(2)+ may increase the time to reach the quasi-steady-state by a factor of 100.

Divergent levels of anxiety in mice selected for differences in sensitivity to a convulsant agent.

Spontaneous behavior patterns were assessed in eight different behavioral situations in two lines of mice, BR and BS, previously selected for their sensitivity to an anxiogenic benzodiazepine (BZ) receptor inverse agonist, Methyl beta-carboline-3-carboxylate (beta-CCM). BR is highly resistant, and BS, highly sensitive to beta-CCM-induced seizures. Tests used included an assessment of general locomotor activity, several situations classically used for measuring fear-motivated behaviors (open field, thigmotaxis, elevated plus-maze, light-dark discrimination, staircase), a test for measuring exploration (holeboard), and a test for measuring nociception (hot-plate).

Long lasting increase in nociceptive threshold induced in mice by forced swimming: involvement of an endorphinergic mechanism.

Mice submitted to forced swimming session(s) displayed a long lasting modification in their nociceptive threshold, assessed through their jump latency from a hot plate (55 degrees C). Thus two forced swimming sessions (6 min each, 8h apart), in water at 33 degrees C, increased by about 50% the jump latency when the hot plate test was performed 14 hours, 3 days or 6 days thereafter. The water temperature (16 degrees C vs 33 degrees C) had no critical influence in this respect.

Reserpine or chronic paroxetine treatments do not modify the vesicular monoamine transporter 2 expression in serotonin-containing regions of the rat brain.

To date, very little information is available about the regulation of vesicular monoamine transporter in central serotonergic regions. The expression of the vesicular monoamine transporter 2 (VMAT2) has been studied in the serotonergic system of the rat brain after an 18 day treatment with the serotonin selective-reuptake inhibitor paroxetine (10 mg/kg, i.p.

The partial agonist properties of levocabastine in neurotensin-induced analgesia.

The antihistaminic drug levocabastine is a ligand for the low affinity neurotensin receptor (NTS2). Its intracerebroventricular administration to mice induced a significant analgesia in the writhing test but not in the hot plate test. In the writhing test, levocabastine decreased neurotensin-induced analgesia to a level not significantly different from the effects of levocabastine alone.

Recovery of dopamine neuronal transporter but lack of change of its mRNA in substantia nigra after inactivation by a new irreversible inhibitor characterized in vitro and ex vivo in the rat.

1. In vitro, the ability of DEEP-NCS {1-[2-(diphenylmethoxy)ethyl]-4-[2-(4-isothiocyanatophenyl)ethyl]- piperazine} to inhibit [3H]-dopamine uptake by rat striatal synaptosomes was concentration-dependent and inversely related to the protein concentration. This inhibition was irreversible and resulted from changes in Vmax and KM.

Acute interactions between L-DOPA and the neurotoxic effects of 1-methyl-4-phenylpyridinium or 6-hydroxydopamine in mice.

We have compared the effects of an i.p. pretreatment with L-DOPA (200 mg/kg) associated with benserazide (25 mg/kg) on neurotoxic effects of either 6-hydroxydopamine (6-OHDA) (50 microg, 10 microl per mouse) or 1-methyl-4-phenylpyridinium (MPP+) (17.