The title three-dimensional coordination network, {[Nd(C(4)H(4)N(2)O(2))(4)](ClO(4))(3)}(n), is isostructural to that of other lanthanides. The Nd(+3 )cation lies on a fourfold roto-inversion axis. It is coordinated in a distorted square-anti-prismatic fashion by eight O atoms from bridging pyrazine N,N'-dioxide ligands. There are two unique pyrazine N,N'-dioxide ligands. One ring is located ar...

The hydrolysis of uranyl-, Nd- and Ce-cations, induced by thermal decomposition urea was investigated the impact content experiment temperature on reaction kinetics evaluated. Uranyl precipitated as ammonium diuranate (ADU) with varying stoichiometry. Nd(III) Ce(III) showed comparable pH evolutions lanthanide carbonate hydroxide (LnCO3OH) products were identified, whereas Ce(IV) hydrolysed at l...

Recent observations of the rings around SN 1987A are discussed and modeled, with particular emphasis on HST observations of the inner ring by the SINS 1 team. It is found that the lowest density detected in the ring is (1 ? 2) 10 3 cm ?3. The geometry of the inner ring is constrained by its diierent size in N II] and O III]. The implications of this on the distance to the supernova are discusse...

We show that every semi-artinian module which is contained in a direct sum of finitely presented modules in $si[M]$, is weakly co-semisimple if and only if it is regular in $si[M]$. As a consequence, we observe that every semi-artinian ring is regular in the sense of von Neumann if and only if its simple modules are $FP$-injective.

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Congen ita l hypomyelinati on neu ro path y is a rare co ndi t ion in a ll spec ies , includ ing human beings. In the ve terina ry lit erature relating to domesti c a ni ma ls, the re is on ly a sing le report , whi ch in vol ved two Golde n Retriever puppies in a litt er o f seven." T he present re po rt is th e fi rst o f a co nge ni ta l hypom yeli nati on ne uropa thy in a lamb. A 2month-o ...

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We introduce the notion of iterated co-occurrences, which can be obtained by performing the calculation of statistically significant cooccurrences not on sentence level, but on co-occurrence sets of previous calculations. The underlying mechanisms are explained in detail and we give reasons, why this iteration results in sets of semantically homogeneous words. These can be used for the automati...