22 research outputs found
Nuclear recovery from centrifugation-caused elongation: Involvement of the microfilament system in the nuclear plasticity
No full textThe ultrastructure of organelles appearing in spermatids and nutritive cells of Cipangopaludina malleata
No full textMorfologia e desenvolvimento do núcleo vitelínico do lambari Astyanax bimaculatus (Linnaeus, 1758) (Osteichthyes, Characidae)
No full text<abstract language="eng">A morphological study of the yolk nucleus in previtellogenic oocytes from A. bimacularus has been carried out. Six phases of development were described from its formation closed to the oocyte nucleus to its dispersion in the periferic ooplasm. Histochemical techniques indicate proteins, lipids and RNA in the yolk nucleus of A. bimaculatus, but there are no carbohydrate in this structure. The origin and functional activity of the teleost yolk nucleus are discussed
Cytochemical and ultrastructural study of oogenesis inLithobius forficatus L. (Myriapoda, Chilopoda). Evolution of cellular components
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Ultrastructure of alimentary epithelia of lobsters,Homarus americanus andH. gammarus, and crab,Cancer magister
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An EM autoradiographic study on ovarian follicle cells of Drosophila melanogaster with special reference to the formation of egg coverings
No full textFormation of novel endoplasmic and cortical microtubular arrays inAdiantum protonemal cells induced by blue light irradiation and acropetal centrifugation
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