Slicing the perovskite structure with crystallographic shear planes: the A(n)B(n)O(3n-2) homologous series.

A new A(n)B(n)O(3n-2) homologous series of anion-deficient perovskites has been evidenced by preparation of the members with n = 5 (Pb(2.9)Ba(2.1)Fe(4)TiO(13)) and n = 6 (Pb(3.

Method validation across the disciplines--critical investigation of major validation criteria and associated experimental protocols.

Analytical method development should aim at delivering reliable measurements within a given application. This implies that method validation is integrated in the development process, because it enables to establish a method's performance capabilities, and to demonstrate its fitness-for-purpose. Although analytical chemists mostly are familiar with the validation guidelines within the discipline of their responsibility, we believe that they may take advantage of a better acquaintance with recommendations among disciplines.

[Dermatography. An effective method for pacemaker marking after spinal cord injuries and implantation of a Brindley stimulator for neurogenic bladder].

In our department, two spinal cord lesion patients suffering from neurogenic bladder dysfunction were selected for the implantation of a Brindley stimulator, as they could not be managed by conservative treatment. Accurate positioning of the external transmitter block over the subcutaneous receiver block, which is essential for the Brindley stimulator to function correctly, posed problems for the relatives who had to apply the external transmitter. In order to facilitate positioning, dermatography was used to mark the exact spot where the external transmitter should be placed.

Current status of the river buffalo (Bubalus bubalis L.) gene map.

Ninety-nine loci have been assigned to river buffalo chromosomes, 67 of which are coding genes and 32 of which are anonymous DNA segments (microsatellites). Sixty-seven assignments were based on cosegregation of cellular markers in somatic cell hybrids (synteny), whereas 39 were based on in situ hybridization of fixed metaphase chromosomes with labeled DNA probes. Seven loci were assigned by both methods.

Use of molecular markers for the identification of River Buffalo chromosomes: chromosome one.

A standard karyotype for the River Buffalo has recently been established. The largest five chromosomes are biarmed and, based on the banding homology between cattle and buffalo chromosomes, were suggested to originate from the fusion of cattle acrocentric chromosomes. The origin of buffalo chromosome 1 is controversial due to the difficulty in differentiating between the small acrocentric cattle chromosomes.