Nucleolus Organizing Region
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Chromosomal and sperm ultrastructure studies of brazilian species of Terrarana (Amphibia : Anura) / Analise de especies brasileiras de Terrarana (Amphibia : Anura) utilizando estudos cromossomicos e da ultra-estrutura do espermatozoide
The Terrarana is the largest taxon of the Anura order, comprising 900 species. Recently this anuran group has undergone a series of taxonomical rearrangements. At first, these species were removed from the Leptodactylidae family and transferred to the synonymy of Brachycephalidae, and lately they were placed into a new taxon named Terrarana. Currently, the T
Publicado em: 2008
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2. Expression immunohistochemistry of the cyclo-oxygenase 2 (Cox2) and quantification of the nucleolus organizing region (NOR) in different histological patterns of a canine osteosarcoma / Expressão imunoistoquímica da cicloxigenase-2 (Cox2) e quantificação das regiões organizadoras de nucléolos (NORs) nos diferentes padrões histológicos do osteossarcoma canino
O propósito deste trabalho foi avaliar a intensidade da cicloxigenase 2 (Cox2), as Regiões Organizadoras de Nucléolos Impregnadas pela Prata (AgNORs) e as figuras de mitose por campo nos diferentes tipos de osteossarcomas canino, a partir de um estudo retrospectivo de pouco mais de 10 anos dos casos de osteossarcoma canino que surgiram na rotina da clíni
Publicado em: 2006
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3. Citogenetica comparativa de especies de aplastodiscus e do grupo de Hyla albomarginata (Hylidae, Anura) / Comparative cytogenetics of aplastodiscus species and Hyla albomarginata group (Hylidae, Anura)
The Hylidae family includes four subfamilies, with Hylinae comprising 27 genera. The Hyla genus has many species divided into related groups. The Hyla albomarginata group, as known as "green Hylas" is subdivided into 3 complexes: "albomarginata","albosignata" and "albofrenata". The Aplastodiscus genus has been the object oftaxonomic discussion since its desc
Publicado em: 2005
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4. Analysis of Nondisjunction Induced by the R-X1 Deficiency during Microsporogenesis in Zea Mays L
The r-X1 deficiency in maize induces nondisjunction at the second mitotic division during embryo sac formation. However, it was not known if this deficiency also induces nondisjunction during the microspore divisions. Microsporogenesis in plants lacking or containing this deficiency was compared using two approaches. First, chromosome numbers were determined
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5. Expression of modified rye ribosomal RNA genes in wheat
Several wheats (Triticum aestivum L. em Thell.) containing the short arm of chromosome 1R from rye (Secale cereale L.) translocated to the long arm of wheat chromosome 1B were examined, by in situ hybridization with a biotinylated probe, for the expression of rye rRNA genes located in the nucleolus-organizing region (NOR) present on the short arm of 1R. The
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6. Chromosome painting using repetitive DNA sequences as probes for somatic chromosome identification in maize
Study of the maize (Zea mays L.) somatic chromosomes (2n = 20) has been difficult because of a lack of distinguishing characteristics. To identify all maize chromosomes, a multicolor fluorescence in situ hybridization procedure was developed. The procedure uses tandemly repeated DNA sequences to generate a distinctive banding pattern for each of the 10 chrom
National Academy of Sciences.