Furthermore, according to their cellular characteristics, 11 oocytes substages were distinguished: 1) oogonia (Og), 2) chromatin nucleolus (Cn), 3) early perinucleolus (Pn1), 4) late perinucleolus (Pn2), 5) oil globule (Li), 6) yolk globule (yg), 7) early vitellin
globule (Ev1), 8) late vitellin
globule (Vo2), 9) postvitelogenic (Pvo), 10) germinal vesicle migration (Gvm), and 11) germinal vesicle breakdown (Gvb) (Fig.
The embryos received a single dose of 0.1 [micro]g of Methylmercury II chloride (Sigma-Aldrich, USA) diluted in 50 [micro]L of saline solution, administered into the yolk sac near the vitellin
glands are globular and located between nearly the middle of the body and the posterior of the hind testis.
Insulin and 20E increased the vitellogenin and vitellin
amounts but decreased ecdysteroid content in ovaries.
Mating pair combinations of insecticide-treated male and female Nilaparvata lugens (Stal) (Hemiptera: Delphacidae) planthoppers influence protein content in the male accessory glands (MAGs) and vitellin
content in both fat bodies and ovaries of adult females.
Furthermore, since yolk proteins such as vitellin
and lipophorin readily aggregate under low ionic conditions, organellar membranes of a reasonable quality were isolated by including 0.3 mol [1.sup.-1] NaCl at each step (Azuma and Yamashita, 1985).
This result is due to the protective function of the egg cover, such as the vitellin
, chitin and especially an internal glycolipid layer, which provides resistance to chemicals and prevents the entry of foreign substances (STIRLING & WEST, 1991; PERRY et al, 2009).
Several molecules were identified, like Bm95 (93), vitellin
(94), 64P (95), trypsin inhibitors (96), SBm1462 (97), ferritin 2 (98) and subolesin (99-100).
La tumeur du sac vitellin
est differenciee dans le sens extra-embryonnaire et reproduit des structures evocatrices du sac vitellin
Les trois premiers jours du developpement des larves ont montre une reduction progressive du sac vitellin
suivie d'un passage a la nourriture exogene.
This band closely corresponds to one of the main vitellin
forms identified in mature ovaries of C.
Believing in the potential for a better antiseptic formulation of silver, Barnes encouraged Hille to develop a technique for producing a non-irritant formulation: this effort was successful, through the use of a protein found in wheat and rye, to produce silver vitellin
, an organic formulation that was named Argyrol.