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Mostrando ítems 11-20 de 202
Spermiogenesis in phytophagous bug (Hemiptera, Pentatomidae): an ultrastructural study
(Editrice Compositori BolognaBolognaItália, 1998)
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 ...
Ultrastructural immunocytochemical evidence for actin in the acrosomal complex during spermiogenesis of the lizard Tropidurus itambere (Rodrigues, 1987) (Reptilia : Tropiduridae)
(Univ Florence Botany InstFlorenceItália, 2006)
An ultrastructural study of spermiogenesis in three species of Physalaemus (Anura, Leptodactylidae)
(Inst Histol Embriol-conicetMendozaArgentina, 1999)
Spermiogenesis in Melanophryniscus cambaraensis (Amphibia, Anura, Bufonidae): ultrastructural and cytochemical studies of carbohydrates using lectins
(Faculty PressCambridgeInglaterra, 2001)
Ultrastructural study of acrosome formation in mongolian gerbil (Meriones unguiculatus)
(Churchill Livingstone, 2000-12-01)
Spermatogenesis is a complex and very well organized process lasting from 30 to 75 days in mammals. The spermatogenic process has been described mainly in laboratory mammals, such as the rat, while correspondent studies ...
Presence of chromatoid bodies in the Rhodnius genus detected by cytochemical analysis
(Funpec-editora, 2016-01-01)
In addition to the epidemiological importance regarding the transmission of Chagas disease, triatomines are also important biological models for cellular studies, because they have holocentric chromosomes, post-reductional ...
Sperm of Doradidae (Teleostei: Siluriformes)
(Churchill Livingstone, 2011-02-01)
Spermatic characteristics were studied in 10 species representing several distinct groups within the catfish family Doradidae. Interestingly, different types of spermatogenesis, spermiogenesis and spermatozoa are correlated ...
An assessment approach for application of spermatic data in phylogenetic analyses: Within the genus Moenkhausia Eigenmann, 1903 (Characiformes: Characidae)
(2013-07-01)
Spermiogenesis and sperm ultrastructure from 21 species of Moenkhausia and others related genera are described. To evaluate the phylogenetic signals, 18 unordered characters were utilized in implied weighting analysis ...
Immunoelectron microscopical detection of tubulins during spermiogenesis in phytophagous bugs (Hemiptera : Pentatomidae)
(Int Science Services/balaban PublishersRehovotIsrael, 2001)