Sex-change chemicals and their influence on the brain. [PDF]
The potential for man-made chemicals to mimic or antagonise natural hormones is a controversial issue, but one for which increasing amounts of evidence are being gathered worldwide.
Harris, CA
core +3 more sources
DmCatD, a cathepsin D-like peptidase of the hematophagous insect Dipetalogaster maxima (Hemiptera: Reduviidae): Purification, bioinformatic analyses and the significance of its interaction with lipophorin in the internalization by developing oocytes [PDF]
DmCatD, a cathepsin D-like peptidase of the hematophagous insect Dipetalogaster maxima, is synthesized by the fat body and the ovary and functions as yolk protein precursor. Functionally, DmCatD is involved in vitellin proteolysis.
Arrese, Estela L. +8 more
core +1 more source
Ultrastructural features of oogenesis of the iteroparous and long lived eunicid polychaete Marphysa sanguinea (Montagu, 1815) from the Lagoon of Tunis were studied using both light and transmission electron microscopy methods.
Monia Elbarhoumi +3 more
doaj +1 more source
The Pacific white shrimp Litopenaeus vannamei is an economically important penaeid species worldwide. Under farming conditions, the full ovarian maturation of L.
Zhi Li +12 more
doaj +1 more source
Reduced glutamine synthetase activity alters the fecundity of female Bactrocera dorsalis (Hendel) [PDF]
Glutamine synthetase (GS) is a key enzyme in glutamine synthesis and is associated with multiple physiological processes in insects, such as embryonic development, heat shock response, and fecundity regulation.
Smagghe, Guy +5 more
core +2 more sources
Histochemical characteristics of the vitellogenic oocytes of the bluefin tuna, Thunnus thynnus L.
Very little information is available with respect to dynamic aspects of oocyte development and to yolk composition of tuna species. Since histological approaches can offer considerable information about the ovarian development of fish, and because ...
C Sarasquete +7 more
doaj +1 more source
Targeted gene expression profiling in European sea bass (Dicentrarchus labrax, L.) follicles from primary growth to late vitellogenesis [PDF]
7 páginas, 6 figuras, 1 tabla como material suplementario.A real-time PCR-based gene expression survey was performed on isolated European sea bass follicles from primary growth to late vitellogenesis. Expression levels of 18 transcripts with demonstrated
Behmenburg, Clemens +3 more
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Vitellogenesis of diphyllobothriidean cestodes (Platyhelminthes)
The recently erected cestode order Diphyllobothriidea is unique among all tapeworm orders in that its species infect all major groups of tetrapods, including man. In the present paper, the vitellogenesis of representatives of all three currently recognized families of this order was evaluated, based on ultrastructural (transmission
Aneta, Yoneva +3 more
openaire +2 more sources
Vitellogenesis in Manduca sexta [PDF]
Eggs of Manduca sexta contain four well-characterized protein derived from hemolymph: vitellogenin and lipophorin (very high density lipoproteins); microvitellogenin, a 26,000 dalton female-specific protein lacking lipid and carbohydrate, and insecticyanin, a blue biliprotein composed of four identical 22,000 dalton subunits.
Kawooya, John K. +2 more
openaire +3 more sources
Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees [PDF]
International audienceChaetodactylus osmiae (Dufour, 1839) is a mite parasitizing the solitary bee - Osmia rufa L.- used as a commercial pollinator. In this study we present the anatomy of female and male reproductive systems of this species as well as ...
Rożej-Pabijan, Elżbieta +1 more
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