Results 51 to 60 of about 85 (76)
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Functional organization of the nucleus in the oogenesis of Chrysopa perla L. (Insecta, Neuroptera)
Chromosoma, 1972On the basis of light, autoradiographic (uridine-3H incorporation) and electron microscopic investigation changes of nuclear structures were examined during the oogenesis in Chrysopa perla L. — In early meiotic prophase the oocyte nuclei were found to contain a large body of extrachromosomal DNA.
M N, Gruzova +2 more
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Cell and Tissue Research, 1978
During courtship, males of Chrysopa perla extrude from the genital aperture two eversible vesicles that bear approximately 50 sclerotized tubercles with a long, apical hair. Ultrastructural study reveals within each tubercle two juxtaposed subunits: a sensory subunit formed by a mechanoreceptor neuron, a glial cell, two enveloping cells, and a ...
S, Wattebled, J, Bitsch, A, Rousset
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During courtship, males of Chrysopa perla extrude from the genital aperture two eversible vesicles that bear approximately 50 sclerotized tubercles with a long, apical hair. Ultrastructural study reveals within each tubercle two juxtaposed subunits: a sensory subunit formed by a mechanoreceptor neuron, a glial cell, two enveloping cells, and a ...
S, Wattebled, J, Bitsch, A, Rousset
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La formation des cystes dans l'ovariole de chrysopa perla (L.) (neuroptera: Chrysopidae)
International Journal of Insect Morphology and Embryology, 1978Abstract In the polytrophic ovarioles of Chrysopa perla , the germarium is the site of formation of the cyst or functional oocyte-nurse cells complex. Descended from a cystoblast, the cyst shows frequently 12 cystocytes (12–14: exception to the 2 n rule); the latter are connected by intercellular bridges.
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International Journal of Insect Morphology and Embryology, 1978
Abstract In the germarium of Chrysopa perla the differentiation of the cystocytes begins as early as the second mitotic division in the formation of the cyst, where 2 medial and 2 lateral cells are distinguishable. The differentiation of the 2 lateral cystocytes as nurse cells (type C: early nurse cells) begins early.
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Abstract In the germarium of Chrysopa perla the differentiation of the cystocytes begins as early as the second mitotic division in the formation of the cyst, where 2 medial and 2 lateral cells are distinguishable. The differentiation of the 2 lateral cystocytes as nurse cells (type C: early nurse cells) begins early.
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Wechselbeziehungen zwischen den Keimbl�ttern bei der Organbildung von Chrysopa perla (L.)
Wilhelm Roux' Archiv f�r Entwicklungsmechanik der Organismen, 1942openaire +3 more sources
ÉTUDE AU LABORATOIRE DE LA RECHERCHE DU SITE DE TISSAGE DU COCON PAR LES LARVES DE CHRYSOPA PERLA (L.) (NEUROPTERA, CHRYSOPIDAE) [PDF]
Entomologia Experimentalis et Applicata, 1978 Les larves de Chrysopa perla lorsqu'elles sont prêtes à tisser leur cocon manifestent une tendance à descendre de leur support, recherchant secondairement un site obscur et qui assure le contact. Lorsque le milieu est sec et meuble, elles s'enfouissent à une profondeur qui n'excède pas 20 mm dans la sciure.
Cannard, Michel, Prudent, Patrick
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Bildung und differenzierung der keimblätter bei chrysopa perla (L.)
Zeitschrift für Morphologie und Ökologie der Tiere, 1939Die Bildung und Segmentierung der Keimblatter beruht auf allgemeiner Zelldifferenzierung des ursprunglich gleichformigen Blastoderms. Diese Differenzierung geht von einem prothorakalen Differenzierungszentrum aus und schreitet von da nach vorn und hinten weiter.
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[Ultrastructure of trophocyte nuclei in polytrophic ovarioles of Chrysopa perla (Neuroptera)].
Tsitologiia, 1976The light and electron microscope and autoradiographic studies (H3-uridin incorporation) were carried out on the trophocyte nuclei of imago polytrophic ovarioles of Chrysopa perla (Neuroptera), from the trophocyte differentiation up to their degeneration.
Z P, Zaĭchikova, M N, Gruzova
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