A structural-magnetic models of the orthorhombic and triclinic modifications arsenates Cu4O(AsO4)2 isotypic phosphates Cu4O(PO4)2 has been built analyzed. Their base elements are complicated ribbons composed antiferromagnetic Cu4 tetrahedra. Structurally, these tetrahedra have no shared copper atoms; however, there strong (AFM) ferromagnetic (FM) couplings between them, both within them. It est...

Atomistic modelling studies of the apatite-type oxide ion conductor La9.33(GeO4)6O2 show that a key role of the O4 channel oxygen atoms appears to be as a reservoir for the creation of interstitial oxide ion defects, while the migration of these defects proceeds via the GeO4 tetrahedra.

24 European Crystallographic Meeting, ECM24, Marrakech, 2007 Page s105 Acta Cryst. (2007). A63, s105 MS44 O4 Determination of Fast and Irreversible Phenomena by Time-Resolved Diffraction. Caroline Curfs, Ann Terry, Miguel-Angel Rodriguez, Erich Kisi, Gavin Vaughan, Åke Kvick. ESRF, Grenoble France. ISIS, Didcot, UK. ICV, Madrid, Spain. The University of Newcastle, Newcastle, Australia. E-mail: ...

The expansion of arbitrary power series in various classes of polynomial sets is considered. Some applications are also given. Notations. We will use the following contracted notation for the generalized hypergeometric function •i> •flB P q\bl,...,bQ pFAb, ^ M* z_k where p. « r(o4 k) («iOfc-n fy)*. (*v*s rw* and (°)* / = ! / = ! r(o)

Nucleosides spin-labelled with isoindoline-derived benzimidazole ((Im)U) and benzoxazole ((Ox)U) moieties were synthesized and incorporated into DNA oligonucleotides. Both labels display limited mobility in duplex DNA but (Im)U was less mobile, which was attributed to an intramolecular hydrogen bond between the N-H of the imidazole and O4 of the uracil nucleobase.

The O9 antigen of Burkholderia (Pseudomonas) cepacia has the following disaccharide repeating-unit: -->4)-alpha-D-Glcp-(1-->3)-alpha-L-Rhap-(1--> The same unit is present in the O antigens of Serratia marcescens strain S1254 and serogroup O4 (predominantly acetylated at O-2 of rhamnose in the latter case).

ABSTRACT Pulsars are rotating neutron stars that emit periodic electromagnetic radiation. While pulsars generally slow down as they lose energy, some also experience glitches: spontaneous increases of their rotational frequency. According to several models, these glitches can lead the emission long-duration transient gravitational waves (GWs). We present detection prospects for such signals by ...

BACKGROUND AND PURPOSE Translational research is beginning to reveal the importance of trophic factors as a therapy for cellular brain repair. The purpose of this study was to analyze whether brain-derived neurotrophic factor (BDNF) administration could mediate oligodendrogenesis and remyelination after white matter injury in subcortical stroke. METHODS Ischemia was induced in rats by injecti...