Reversibility in Reactions of Linker-Bridged Distannenes with Terminal Alkynes at Ambient Temperature.

The linker-bridged distannene [(2,6-Mes2)C6H3Sn]2C12H8 (1) featuring an acenaphthene linker and the sterically demanding terphenyl substituent Ar(Me) (= C6H3-2,6-Mes2; Mes = C6H2-2,4,6-Me3) was prepared and characterized by single-crystal analysis, NMR spectroscopy, as well as elemental analysis. Furthermore, the reactivity of distannene 1 and previously reported distannenes 2 and 3, bearing either a naphthalene or a 9,9-dimethylxanthene backbone and the terphenyl substituent Ar(Me), as well as bis(stannylene) 4, featuring a 9,9-dimethylxanthene backbone and the terphenyl substituent Ar(iPr) (= C6H3-2,6-Trip2; Trip = C6H2-2,4,6-i-Pr3), toward terminal alkynes at ambient temperature was investigated, leading to the formal [2 + 2] cycloaddition products 5-9. The reactions of distannene 1 with trimethylsilylacetylene and phenylacetylene, the reaction of distannene 2 with trimethylsilyl-acetylene, as well as the reaction of bis(stannylene) 4 with phenylacetylene show reversibility, while distannenes 2 and 3 react irreversibly with phenylacetylene at room temperature.

The implications of virus diversity within the SAT 2 serotype for control of foot-and-mouth disease in sub-Saharan Africa.

SAT 2 is the serotype most often associated with outbreaks of foot-and-mouth disease (FMD) in livestock in southern and western Africa and is the only SAT type to have been recorded outside the African continent in the last decade. Its epidemiology is complicated by the presence of African buffalo (Syncerus caffer), which play an important role in virus maintenance and transmission. To assess the level of genetic complexity of this serotype among viruses associated with both domestic livestock and wildlife, complete VP1 gene sequences of 53 viruses from 17 countries and three different host species were analysed.

Genotyping field strains of African swine fever virus by partial p72 gene characterisation.

A PCR-based sequencing method was developed which permits detection and characterization of African swine fever virus (ASFV) variants within 5 and 48 h, respectively, of receipt of a clinical specimen. Amplification of a 478 bp fragment corresponding to the C-terminal end of the p72 gene, confirms virus presence with genetic characterization being achieved by nucleotide sequence determination and phylogenetic analysis. The method was applied to 55 viruses including those representative of the major ASF lineages identified previously by restriction fragment length polymorphism (RFLP) analysis.

[Children with epilepsy - psychiatric and neuropsychological results in comparison to healthy children].

Questions: Do children with epilepsy exhibit psychiatric, intellectual or motoric symptoms compared to healthy children? How relevant is the type of epilepsy?.

Methods: Children with diagnosed epilepsy aged 6 - 15 years were investigated by means of an established neuropsychological test program. Under anticonvulsive therapy the children were free from epileptic seizures.

Children with epilepsy after withdrawal of anticonvulsive therapy: psychiatric behaviour and neuropsychological abilities.

Unlabelled: Do children who remain in remission with epilepsy after withdrawal of anticonvulsive therapy still exhibit a different behaviour and performance-related abilities compared to healthy children? It was the aim of this study to investigate whether these children showed deviating psychiatric behaviour and/or neuropsychological function deficits as compared with a healthy control group and with children following occasional seizures which had never been treated. The study comprised 39 children with epilepsy after withdrawal of anticonvulsive therapy, 37 children with occasional seizures, and 39 matched healthy control children who were tested with regard to psychiatric and neuropsychological criteria. The patients were aged 6-15 years; 28 had a primarily generalised epilepsy, and 11 had a focal epilepsy.