Germinative Cells
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. The quantification of testicular cells during the postnatal development in two Caviomorph rodents: the guinea pig (Cavia porcellus) and the cutia (Dasyprocta agouti)
ABSTRACT The germinative, Sertoli and Leydig cells of two caviomorph rodents (Cavia porcellus and Dasyprocta agouti) were counted as well as the estimation of the total volume of the testis and the total volume of seminiferous tubules and interstitium in prepubertal, pubertal and adult animals. The number of spermatogonia, spermatocytes and spermatids cells
An. Acad. Bras. Ciênc.. Publicado em: 17/08/2017
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2. Histological and immunohistochemical study of the ovaries and oviducts of the juvenile female of Caiman latirostris (Crocodilia: Alligatoridae)
ABSTRACT The purpose of this study was to examine the ovaries and the oviduct of juvenile females of the broad-snouted caiman, Caiman latirostris (Daudin, 1802), using light microscopy, histochemical and immunocytochemical techniques. The ovarian cortex was observed to contain groups of germinative cells and abundant previtellogenic follicles at different st
Zoologia (Curitiba). Publicado em: 2015-10
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3. Maintenance of the corneal epithelium is carried out by germinative cells of its basal stratum and not by presumed stem cells of the limbus
The purpose of this investigation was to analyze the proliferative behavior of rabbit corneal epithelium and establish if any particular region was preferentially involved in epithelial maintenance. [3H]-thymidine was injected intravitreally into both normal eyes and eyes with partially scraped corneal epithelium. Semithin sections of the anterior segment we
Braz J Med Biol Res. Publicado em: 2014-06
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4. Morphology and histology of the female reproductive system of the mangrove land crab, Ucides cordatus (Linnaeus, 1763) (Brachyura: Ocypodidae)
This study provides a detailed description of the macro- and microscopic anatomy of the female reproductive system of the mangrove land crab, Ucides cordatus. A total of 277 females were collected between October 1998 and September 1999 in mangroves of the Victoria Bay, State of Espírito Santo, Southeast Brazil. The reproductive system of this species is co
Nauplius. Publicado em: 2011-12
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5. Differential patterns of myosin Va expression during the ontogenesis of the rat hippocampus
Myosin Va is an actin-based, processive molecular motor protein highly enriched in the nervous tissue of vertebrates. It has been associated with processes of cellular motility, which include organelle transport and neurite outgrowth. The in vivo expression of myosin Va protein in the developing nervous system of mammals has not yet been reported. We describ
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-09
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6. Testicular morphology and morphometry in mice chronically exposed to arsenic / Morfologia e morfometria testicular de camundongos adultos submetidos à exposição crônica ao arsenato
There is an increasing concern about the potentially harmful effects of several environmental pollutants, as for instance, the inorganic arsenic, one of the main pollutants of the water worldwide. The intoxication by arsenic can be acute or chronic, and lead to a variety of pathologies and impairment of male reproductive system. This work aimed to investigat
Publicado em: 2009
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7. Morphofunctional evaluation of the testis and the process of spermatogenic the oncilla (Leopardus tigrinus, SCHREBER, 1775) adult / Avaliação morfofuncional do testículo e do processo espermatogênico do gato-do-mato-pequeno (Leopardus tigrinus, SCHREBER, 1775) adulto
The study of testicular morphology and the spermatogenic process in wild animals is fundamentally important for the knowledge about the physiologic patterns, by which the assisted reproduction protocols are established. The objectives of this study were to describe morphometry data of testis and seminiferous tubule, quantify and describe the arrangement of t
Publicado em: 2008
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8. Conexão entre os processos de degradação das reservas de proteinas e carboidratos e o edfeito dos hormonios e açucares em sementes de Sesbania virgata (Cav.) Pers / Connection between storage proteins and carbohydrates degradation and the effects of hormones and sugars in seeds of Sesbania virgata (Cav.) Pers
Seeds of Sesbania virgata (Cav.) Pers. have an endosperm which accumulates galactomannan as a storage polysaccharide in the cell walls that is hydrolysed after germination by three enzymes (a-galactosidase, endo-ß-mannanase and exo-ß-mannosidase). Besides the storage of carbon, there is a great amount of protein bodies in the cytoplasm of endospermic cells
Publicado em: 2008
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9. Morphology of the reproductive system of male thorny lobster Panulirus argus (Latreille, 1804) (Crustacea: Decapoda: Palinuridae) of coastline of the State of Cearà / Morfologia do sistema reprodutor masculino da lagosta espinhosa Panulirus argus (Latreille, 1804) (Crustacea: Decapoda: Palinuridae) do Litoral do Estado do CearÃ
The fishery of the spiny lobster Panulirus argus, found in the coast of the state of CearÃ, has been declining in the last years. Studies about the reproductive aspects of lobsters are still scarce, mainly for the males, needing investigations in the area of reproductive biology. The present study describes the morphology of the male reproductive system of
Publicado em: 2007
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10. Caracterização molecular e funcional dos genes ras1 e ras2 do fungo dimórfico e patogênico Paracoccidioides Brasiliensis
Paracoccidioides brasiliensis is a thermo-dimorphic fungus that causes a human systemic mycosis with high incidence in Latin America. Due to their participation in the control of pathogen morphogenesis, differentiation and virulence the characterization of ras genes in P. brasiliensis was done. It was identified ras1 and ras2 coding for two different protein
Publicado em: 2007
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11. Desenvolvimento morfológico dos testículos em embriões e fetos eqüinos sem raça definida / Morphological development of testes in embryos and fetuses of cross-breed equines
O objetivo deste trabalho foi caracterizar histologicamente o desenvolvimento testicular de embriões e fetos eqüinos sem raça definida. A pesquisa compreendeu: identificação das células germinativas primordiais (CGPs), aparecimento da crista gonádica e diferenciação gonadal, o surgimento das precursoras das células de Sertoli, túnica albugínea e
Publicado em: 2007
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12. Analise filogenetica da superfamilia Loricarioidea (Teleostei: Siluriformes) com base na ultra-estrutura da espermiogenese e dos espermatozoides / Phylogenetic analysis of superfamily Loricarioidea (Teleostei: Siluriformes) based on spermiogenesis and spermatozoa ultrastructure
The order Siluriformes comprises the most diverse and widely distributed ostariophysan groups, presenting thirty-six families with approximately 480 genera and over 3.000 species. Among the neotropical siluriform lineages likely to be monophyletic is the superfamily Loricarioidea. The relationships among catfish families suggest that Loricarioidea is sister
Publicado em: 2007