Results 91 to 100 of about 6,694 (212)

Krüppel Homolog 1 Is Required for the Role of Methyl Farnesoate in Vitellogenesis in the Mud Crab Scylla paramamosain

open access: yesFishes
Methyl farnesoate (MF), a counterpart of insect juvenile hormones in crustaceans, plays essential roles in molting, metamorphosis, and reproduction. In this paper, we isolated a gene-encoding Krüppel homolog 1 from the mud crab Scylla paramamosain (Sp-Kr-
Yongqi Lai   +4 more
doaj   +1 more source

Ultrastructural studies of oogenesis in Bolinus brandaris (Gastropoda: Muricidae)

open access: yesScientia Marina, 2004
Ultrastructural studies of oogenesis in Bolinus brandaris are described. Although the initial phase of oogenesis is common to most animal species, vitellogenesis can be considered a species-specific characteristic.
María José Amor   +2 more
doaj   +1 more source

PTHrP potentiating estradiol-induced vitellogenesis in sea bream (Sparus auratus, L.) [PDF]

open access: yes, 2006
Contains fulltext : 35553.pdf ( ) (Open Access)In fish, vitellogenin is an important nutritional precursor protein produced solely in the liver and released into the blood where it binds calcium.
Canario, A.V.   +5 more
core   +1 more source

Effects of methoprene, nonylphenol, and estrone on the vitellogenesis of the mysid Neomysis integer

open access: yes, 2006
The induction of the female-specific protein, vitellogenin, in male fish is a well-established endpoint to assess exposure to estrogen-like chemicals. The use of vitellogenesis as a biomarker for xenobiotic exposure in egg-laying invertebrates, however ...
Janssen, C.R.   +5 more
core   +1 more source

Localization of vitellin in different phases of ovarioles during vitellogenesis of MEAM1 whiteflies.

open access: yes, 2012
The nuclear and vitellin were seen by laser scanning confocal microscopy following exposure to DAPI (blue) and FITC labeled anti-Vt antibody (green). I: previtellogenesis-phase I oocytes.
Jian-Yang Guo (141951)   +7 more
core   +1 more source

Étude de la structure ovarienne de Barbus holotaenia, Boulenger, 1904 (Pisces, Cyprinidae) du bassin de la Luki (Zaïre)

open access: yesKnowledge and Management of Aquatic Ecosystems, 1996
L'examen histologique et cytologique des ovaires de Barbus holotaénia a permis de distinguer différents stades de développement.(stades 0 à VI). Le stade 0 correspond à la transformation des cellules primordiales en ovocytes.
MUTAMBUE S.
doaj   +1 more source

The ultrastructural aspects of vitellogenesis or oocyte secondary growth in Serrasalmus spilopleura (Teleostei, Characiformes, Serrasalminae)

open access: yes, 2002
Oocyte secondary growth in S. spiloleura corresponds to the period in which different vesicular structures are formed, including the cortical alveoli and the yolk granules.
Quagio-Grassiotto, I., Guimaraes, A. C D
core   +2 more sources

In vitro assessment of Na+, Mg2+, Ca2+, and K+ on vitellogenesis and expression of genes related to ovarian development in female Chinese mitten crab, Eriocheir sinensis

open access: yesAquaculture Reports
Seawater contains a variety of mineral ions, such as Na+, Mg2+, Ca2+, and K+. Although previous studies have shown that brackish water can promote ovarian development of the Chinese mitten crab (Eriocheir sinensis), it remains unclear whether these ions ...
Shaicheng Zhu   +4 more
doaj   +1 more source

A Study of Organelles Associated with Vitellogenesis in Oncomelania Hupensis Quadrasi, A Molluscan Host of Schictosoma Japonicum

open access: yes, 2017
A Study of Organelles Associated with Vitellogenesis in Oncomelania Hupensis Quadrasi, A Molluscan Host of Schictosoma ...
F.G Claveria, F.J Etges
core   +1 more source

Vitellogenin receptors during vitellogenesis in the rainbow trout Oncorhynchus mykiss

open access: yes, 1996
Rainbow trout vitellogenin receptors have been characterized by ligand blotting and Scatchard analysis. Their evolution has been studied over a reproductive cycle in a broodstock of 2-year-old females.
Nunez, Jesus, Bon, E., Le Menn, F.
core   +1 more source

Home - About - Disclaimer - Privacy