Ultrastructure of the eggs ofPolymorphus magnus(Acanthocephala, Polymorphidae)
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چکیده
منابع مشابه
Ultrastructure of the eggs of Culicoides molestus (Diptera: Ceratopogonidae).
The eggs of Culicoides molestus (Skuse) are described and illustrated by scanning and transmission electron microscopy. Eggs are elongate with a slight dorsoventral curvature. No outer chorionic tubercles are present. Aeropyles are present in large numbers at the anterior end and in lower numbers at the posterior end and lateral regions. The chorion has 5 layers. An outer, rough, proteinaceous ...
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Immunofertilization studies have shown that anti-sera have a number of effects on sea urchin eggs. An unusually interesting feature of the action of antibody on the fertilizing capacity of the eggs is the dependence on the bivalent character of the antibody. Treatment of the eggs with univalent antibody prepared by papain digestion has no effect on fertilizability (Metz and Thompson, 1967; Graz...
متن کاملUltrastructure of the Eggs Chorion of Ceraleptus obtusus (Brulle, 1839) (Heteroptera: Coreidae)
The eggs of Ceraleptus obtusus were studied with light and scanning electron microscope. The females were collected from the Sinekci mountain pass of Kas (Antalya, Turkey) and maintained under laboratory conditions. The oval shaped eggs averaged 1.35 mm in length and 0.74 mm in width. The eggs were dark brown and mat. The egg chorion surface showed a chorionic pattern resulting in irregular hex...
متن کاملUltrastructure and Birefringence of the Isolated Mitotic Apparatus of Marine Eggs
Isolated mitotic apparatuses (MA) of clam and sea urchin eggs were investigated by polarizing and electron microscopy. Examination of fixed MA in oils of different refractive index revealed that at least 90% of the retardation of isolated MA is due to positive, form birefringence, the remaining retardation deriving from positive, intrinsic birefringence. Electron micrographs reveal the isolated...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: Parasite
سال: 2004
ISSN: 1252-607X,1776-1042
DOI: 10.1051/parasite/200411133