Consulta: creatorFacets:"Neves,Clóvis A."
Registros recuperados: 2
Data/hora: 18/06/2024 15:43:24

Digestive and regenerative cells in the midgut of haploid and diploid males of the stingless bee Melipona quadrifasciata anthidioides (Hymenoptera: Apidae)
Provedor de dados: Revista Brasileira de Zoologia
Autores: Fernandes,Kenner M.; Martins,Gustavo F.; Serrão,José E.; Neves,Clóvis A.
In eusocial bees, workers and queens are diploid (2n), whereas males are haploid (n). However, in some species, including the stingless bee Melipona quadrifasciata anthidioides Lepeletier, 1836, 2n males arise from fertilized eggs resulting from the crossing between a queen and her brother. In the present study, we provide a comparative analysis of the digestive and regenerative cells in n and 2n pupae and adult males of M. quadrifasciata anthidioides. In n and 2n pupae and adult males, the number of regenerative cells/nest was similar. In n and 2n pupae, the mean number of digestive cells/midgut area was 2076 ± 0.60, whereas in adults it was 1234 ± 1.42 digestive cells/midgut area. The nuclear area of the digestive cells was also similar in both n and 2n...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Digestive system; Drones; Eusocial insect; Morphology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000500015

Endocrine cells and nerve ganglia of the small intestine of the Opossum Didelphis aurita Wied-Neuwied, 1826 (Mammalia: Didelphidae)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Freitas-Ribeiro,Gláucia M.; Fonseca,Cláudio C.; Sartori,Sirlene S.R.; Loures-Ribeiro,Alan; Neves,Clóvis A.
The nervous and endocrine systems jointly control intestinal movements, secretions of their glands and also participate of the processes of nutrient digestion and absorption. Therefore, the central objective of this study was to verify the existence of a possible relationship between the number of nervous cells and ganglia of the submucosal and myenteric plexuses and the number of endocrine cells in the small intestine of adult D. aurita. The utilized staining techniques were Grimelius, modified Masson-Fontana, direct immunoperoxidase and H-E. Argyrophillic, argentaffin and insulin immunoreactive endocrine cells do not numerically vary between the initial, mid and final regions of the duodenum, jejunum and ileum (P&gt;0.05), except for argyrophillic cells...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Argyrophillic cells; Argentaffin cells; Endocrine cells; Ganglia; Insulin.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300017