Cytogenetic analysis was made of four of these
species: Astyanax eigenmanniorum, Deuterodon stigmaturus, Hyphessobrycon luetkenii, and H. anisitsi, collected from various hydrographic basins: hydrographic system from Laguna dos Patos/RS, Tramanda basin/RS and Tibagi River basin/PR. The first two species were collected in their type locality in the State of Rio Grande do Sul. The 2n = 48 karyotype was observed only in A. eigenmanniorum, while the other species had 2n = 50 chromosomes, with different karyotypic formulas. There was weak heterochromatin staining in the pericentromeric region of A. eigenmanniorum, D. stigmaturus and H. luetkenni chromosomes. In H. anisitsi, heterochromatin BMS-754807 cell line appeared to be more abundant and distributed in the pericentromeric and terminal regions of the chromosomes; three pairs showed more evident heterochromatic buy Cilengitide blocks. There were multiple Ag-NORs in all populations, visualized by FISH with an 18S rDNA probe. While D. stigmaturus and H. luetkenii had conserved AgNOR, CMA(3) and 18S rDNA sites, the other two species showed intra- and interindividual variation at these sites. The karyotype variability was high, as is common in this group of fish. Different species
arising from isolated hydrographic basins maintain an elevated level of karyotype differentiation, mainly with respect to chromosome structure, heterochromatin distribution and rDNA localization. This is the first report with cytogenetic data for D. stigmaturus and H. luetkenii.”
“The diffusion of rare-earth ion, Yb(3+), into ZnO lattice has been measured using spatially resolved electron energy-loss spectroscopy in transmission electron microscopy. Although a trace of Yb(3+) can be detected in ZnO, the diffusion
distance was only in a magnitude of several tens of nanometers. It also discovered that large amounts of interstitial O were formed in the Yb(3+) diffusion region. These interstitial O formed a thin layer (similar to 20 nm) which separated the Selleckchem GSK2245840 Yb(3+) diffusion layer from the bulk ZnO. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3493260]“
“We present the case of a boy with a 3-year history of relapsing/remitting monoarthritis of the ankle joint. Despite negative cultures at first presentation, synovial fluid examination revealed Mycobacterium kansasii.. This is the youngest reported case of M. kansasii septic arthritis in a child.”
“Polymorphisms of the p53 gene have been associated with susceptibility to endometrial cancer. However, whether there is a specific association is still controversial. We investigated a possible association between p53 codon 72 polymorphism and endometrial cancer risk by conducting a meta-analysis. Publications addressing this association were selected from the Pubmed, Embase and CBM databases (up to January 2011). Data were extracted from the studies by two independent reviewers. The meta-analysis was performed using RevMan 5.0.25 and STATA 9.