Buscar
Mostrando ítems 1-10 de 727
Ultrastructural characteristics of spermiogenesis in the domestic duck (Anas platyrhynchos)
(2005-10-01)
In this present study was observed that the spermatids underwent morphological differentiation and modifications, which primarily comprised nuclear elongation, during the process of spermiogenesis in the domestic duck. The ...
Ultrastructural characteristics of spermiogenesis in the domestic duck (Anas platyrhynchos)
(2005-10-01)
In this present study was observed that the spermatids underwent morphological differentiation and modifications, which primarily comprised nuclear elongation, during the process of spermiogenesis in the domestic duck. The ...
Ultrastructural Aspects of Spermatids in Isogenic Black Mouse C57BL6J
(Sociedad Chilena de Anatomía, 2005)
Ultrastructure of Sorubim lima (Teleostei, Siluriformes, Pimelodidae) spermiogenesis
(2000-10-01)
The spermiogenesis and the spermatozoon ultrastructure of Sorubim lima were studied. Our observations showed that early spermatids are round-shaped cells, have spherical nucleus with diffuse chromatin, small quantity of ...
Aneuploidy in spermatids of Robertsonian (Rb) chromosome heterozygous mice
(Kluwer Academic Publishers, 2014)
© 2014, The Author(s). Rb translocations are chromosomal rearrangements frequently found in natural populations of the house mouse Mus musculus domesticus. The standard diploid karyotype of the house mouse consisting of ...
Synaptonemal polycomplexes in spermatids: a characteristic trait of Orthoptera?
(Springer, 1993-09-01)
Spermatogenesis was analysed in a cricket, Eneoptera surinamensis (Gryllidae, Orthoptera), using ultrathin serial sections and transmission electron microscopy. Special attention was placed on documentation of the development ...
Synaptonemal polycomplexes in spermatids: a characteristic trait of Orthoptera?
(Springer, 1993-09-01)
Spermatogenesis was analysed in a cricket, Eneoptera surinamensis (Gryllidae, Orthoptera), using ultrathin serial sections and transmission electron microscopy. Special attention was placed on documentation of the development ...
Cytogenetic evidence for de novo synthesis of rRNA and involvement of nucleolar material in the organization of cell structures during spermiogenesis of Chariesterus armatus (Heteroptera, Coreidae).
(2010-12-01)
The nucleolar material of Chariesterus armatus was analyzed during spermiogenesis in cell preparations impregnated with silver nitrate. Nucleolar corpuscles were observed in spermatids at the beginning of the process, ...