An improved technique for selective silver staining of nucleolar organizer
region in human chromosomes.
The nucleolar organizer
regions are chromosomal loops of DNA involved in ribosomal synthesis.
regions, G- and C-bands in some Brazilian species of Didelphidae.
regions (NORs) and myoepitheliomas: A comparison with DNA content and clinical course.
From the nuclear morphometry, and the morphometric analysis of the nucleolar organizer
areas, it is possible to optimize the prognosis for a better conduct orientation (Dantas et al., 2003).
Regions (NORs) Number, Ratio Dark:Clear Cells, Mean Nuclear Diameter ([micro]m) and Ratio of Nucleus: Cytoplasm (mean [+ or -] SD) in Smears of Ascitic Ehrlich Tumor in Female Mice, Hypothyroid and Euthyroid Ovariectomized and Non-ovariectomized, 10 Days after Tumor Inoculation Hypothyroid Ovariectomized Non-ovariectomized Variable (n = 10) (n = 10) No.
The diploid number, chromosome morphology, SDCS type, and behavior of chromosomes during meiosis were determined with conventional staining, and the distribution pattern of the active nucleolar organizer
regions (NORs) in the chromosomes was established using silver staining.
Afterwards, the application of differential staining techniques such as Ag-NORs for nucleolar organizer
regions, C-banding for heterochromatin or G-banding for individual chromosome identification allowed the identification of specific chromosome pairs in the karyotypes of bivalve species (see Thiriot-Quievreux 2002, for review).
A maximum of 12 nucleolar organizer
regions (NOR) bearing chromosomes were visualized, with the NORs located terminally on the short arms of one pair of medium sized metacentric chromosomes, and on five small-sized acrocentric chromosome pairs.
Most of the cytogenetic studies in oysters so far have focused on karyotyping, chromosome banding, and NOR (nucleolar organizer
regions) staining in Ostrea species (Insua and Thiriot-Quievreux, 1991; Li and Havenhand, 1997).