Now showing items 1-10 of 65
Descrição cariotípica de possíveis novas espécies do complexo Hypostomus ancistroides e outros Hypostominae
(Acta Scientiarum: Biological Sciences, 2012-04-04) [Artigo]
Cytogenetic analyses were performed in four species of the Hypostominae subfamily, three from Hypostomus (Hypostomini) genus and Rhinelepis aspera (Rhinelepini). Three populations of Hypostomus ancistroides were analyzed, ...
Effects of the ethyl acetate fraction of Alchornea triplinervia on healing gastric ulcer in rats
(Pharmaceuticals, 2011-11-09) [Artigo]
Alchornea triplinervia (Spreng.) Muell. Arg (Euphorbiaceae) is a medicinal plant commonly used by people living in the Cerrado region of Brazil to treat gastrointestinal ulcers. We previously described the gastroprotective ...
(Genetics and Molecular Biology, 2008-07-11) [Editorial]
Gestational protein restriction induces CA3 dendritic atrophy in dorsal hippocampal neurons but does not alter learning and memory performance in adult offspring
(International Journal of Developmental Neuroscience, 2013-05-01) [Artigo]
Studies have demonstrated that nutrient deficiency during pregnancy or in early postnatal life results in structural abnormalities in the offspring hippocampus and in cognitive impairment. In an attempt to analyze whether ...
Can DNA barcoding accurately discriminate megadiverse Neotropical freshwater fish fauna?
(BMC Genetics, 2013-03-09) [Artigo]
Background: The megadiverse Neotropical freshwater ichthyofauna is the richest in the world with approximately 6,000 recognized species. Interestingly, they are distributed among only 17 orders, and almost 80% of them ...
Short periods of fasting followed by refeeding change the expression of muscle growth-related genes in juvenile Nile tilapia (Oreochromis niloticus)
(Comparative Biochemistry and Physiology B: Biochemistry & Molecular Biology, 2013-04-01) [Artigo]
Muscle growth mechanisms are controlled by molecular pathways that can be affected by fasting and refeeding. In this study, we hypothesized that short period of fasting followed by refeeding would change the expression of ...
Prostatic stromal cells of old gerbils respond to steroidal blockades creating a microenvironment similar to reactive stroma
(Biomedicine and Aging Pathology, 2011-04-01) [Artigo]
The present study examined the changes in prostatic stroma of old gerbils (18 months) submitted to orchiectomy associated or not with steroidal blockades. Animals were divided into six groups, all surgically castrated ...
Nucleotide sequence of 5S rDNA and localization of the ribosomal RNA genes to metaphase chromosomes of the Tilapiine cichlid fish, Oreochromis niloticus
(Hereditas, 2000-12-01) [Artigo]
In this study, we report the cloning and nucleotide sequence of PCR-generated 5S rDNA from the Tilapiine cichlid fish, Oreochromis niloticus. Two types of 5S rDNA were detected that differed by insertions and/or deletions ...
Molecular and cytogenetic analysis of the telomeric (TTAGGG)n repetitive sequences in the Nile tilapia, Oreochromis niloticus (Teleostei: Cichlidae)
(Chromosoma, 2002-03-01) [Artigo]
The majority of chromosomes in Oreochromis niloticus, as with most fish karyotyped to date, cannot be individually identified owing to their small size. As a first step in establishing a physical map for this important ...
Fluorescence in situ hybridization with rDNA probes on chromosomes of two nucleolus organizer region phenotypes of a species of Eigenmannia (Pisces, Gymnotoidei, Sternopygidae)
(Chromosome Research, 1996-07-27) [Artigo]
Nucleolus organizer regions (NORs) were analysed in two related and geographically close populations of Eigenmannia sp.1 (Pisces, Gymnotoidei, Sternopygidae) using silver staining and fluorescence in situ hybridization ...