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MATTOS E SILVA, R. V. (1994) O português arcaico: morfologia e sintaxe. São Paulo, Ed. Contexto/CED-UFBA (Coleção Repensando a Língua Portuguesa), 138p
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In: DELTA: Documentação e Estudos em Linguística Teórica e Aplicada; v. 11, n. 1 (1995) ; 1678-460X ; 0102-4450 (2019)
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Literacy in a cultural historical perspective ; Alfabetização e letramento em uma perspectiva histórico cultural
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In: Obutchénie: Revista de Didática e Psicologia Pedagógica; 2017: v. 1, n. 3 (set./dez. 2017); 553-575 ; 2526-7647 (2017)
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“Viagem ao mundo das sílabas”: intervenção na consciência fonológica ; “Journey to the syllables' world”: intervention in phonological awareness
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Journey to the syllables’ world : intervention in phonological awareness
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A inter-relação entre o processamento auditivo e a competência leitora
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Morphological and ultrastructural analysis of sheep primordial follicles preserved in 0.9% saline solution and TCM 199
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Cryopreservation of caprine ovarian tissue using glycerol and ethylene glycol
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Degeneration rate of preantral follicles in the ovaries of goats
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Silva, José Roberto Viana; Ferreira, Marcos Antônio Leal; Costa, Sonia Helena Furtado; Santos, R.R; Carvalho, Fabíola Christian Almeida de; Rodrigues, Ana Paula Ribeiro; Luccia, Carolina Madeira; Báo, Sônia Nair; Figueiredo, José Ricardo de. - : Elsevier, 2002
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Abstract:
The degeneration rate of ovarian preantral follicles in goats, and the distribution in the follicular classes (primordial, primary or secondary) was assessed. Ovaries from adult goats were collected at a local slaughterhouse. To evaluate the morphology of the caprine preantral follicles in situ, one fragment from each ovary was fixed individually in Carnoy for 12 h, sectioned serially at a thickness of 7 μm and stained with Periodic Acid Shiff-hematoxylin. Preantral follicles were then classified according to the stage of development. Preantral follicles were classified individually either as morphologically normal; as Type 1 degenerated follicles (only the oocyte was degenerated); or as Type 2 degenerated follicles (when degeneration occurred at both oocyte and granulosa cells). The total examined was 235 primordial, 195 primary and 101 secondary follicles. The distribution of degenerated follicles as primordial, primary and secondary follicles was 8.5, 14.3 and 16.8%, respectively. When Types 1 and 2 degenerated follicles were pooled, secondary follicles were significantly more degenerated than primordial and primary follicles. When degeneration Types 1 and 2 was compared in each follicular class, a higher (P<0.05) percentage of Type 1 degeneration was observed in primordial and primary follicles. Conversely, secondary follicles were significantly more affected by Type 2 degeneration. When the follicular classes were taken together, a significantly higher percentage of Type 1 degenerated preantral follicles was observed when compared with Type 2 degenerated follicles (P<0.05). In conclusion, a low percentage of degenerated preantral follicles was observed and secondary follicles were more affected by degeneration than primordial follicles. Thus, primordial follicles constitute a large and potentially valuable source of oocytes for reproductive programs after in vitro growth and maturation.
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Keyword:
Caprino - morfologia; Folículos pré-antrais; Morfologia (Animais); Ovários - morfologia - caprino
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URL: http://repositorio.unb.br/handle/10482/19378
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