| 释义 |
viˈtello-
combining form (cf. vitelli-) of vitellus, used in a few terms (Biol. and Chem.), as vitello-duct, -intestinal a., -lutein, -rubin (see quots.); viˌtelloˈgenesis, the formation of the vitellus; viˌtellogeˈnetic, -ˈgenic, -genous adjs., producing the vitellus or yolk; viˌtelloˈgenin [-in1], a blood-borne protein from which the substance of the vitellus is made; viˈtellophag |-fæg|, -phage |-feɪdʒ| Ent. [Gr. -ϕαγος eating], a nucleus or energid which, during cleavage and the formation of blastoderm, remains in or moves into the vitellus and assimilates it.
1888Rolleston & Jackson Anim. Life 647 Internally it opens, when single, into the *vitello-duct, or germ-duct.
1956Nature 11 Feb. 277/1 (in table) All [honey-bee ovaries] fully regressed; no commencement of *vitellogenesis. 1974Ibid. 4 Jan. 72/2 Some fish are not fully regressed and have ovaries in early stages of vitellogenesis.
1961Biol. Abstr. XXXVI. 1333/1 (heading) *Vitellogenetic processes of A. depilans observed by electron microscopy with further considerations on the Golgi apparatus. 1978Nature 23 Mar. 351/2 The last female revealed no chorionated eggs and only four late vitellogenetic proximal oocytes..in the ovarioles.
1964Symp. R. Entomol. Soc. ii. 37 In Drosophila, one *vitellogenic oocyte is normally found in each ovariole. 1974Nature 4 Jan. 71/2 The induction of sexual behaviour in female goldfish..by injection of ovulated eggs into the ovarian lumen of individuals with vitellogenic ovaries.
1969Jrnl. Insect Physiol. XV. 1279 Two immunochemically discrete protein yolk precursors or *vitellogenins appear in the blood of adult Periplaneta americana on day 4 or 5 after emergence. 1973Nature 13 July 103/2 Insect yolk proteins, or vitellogenins, are synthesized and secreted by the fat body. 1982Sci. Amer. Nov. 139/3 In the liver [of the garter snake] the phospholipids are incorporated into a lipophosphoprotein known as vitellogenin.
1872E. R. Lankester Advancem. Sci. (1890) 265 The others disappear as..*vitellogenous cells. 1878F. J. Bell Gegenbaur's Comp. Anat. 301 This vitellogenous layer occupies the portion of the chamber behind the egg-cell.
1854Bushman in Orr's Circ. Sci. II. 84 A communication is found to have arisen between the yolk and the intestine, by a wide duct termed the *vitello-intestinal duct.
1886Buck's Handbk. Med. Sci. II. 247/2 In the red eggs of Maja squinado R. Maly found two kinds of coloring matter, which he named *vitellolutein and vitellorubin. Ibid. 248/1 Vitellolutein is soluble in alcohol to a clear yellow solution.
1892J. P. McMurrich in Zool. Anzeiger XV. 274 In the same manner the endoderm cells are excluded from the surface of the egg, but in this case there is an actual immigration, the cells sinking down into the interior of the yolk, and becoming ‘*vitellophags’. 1904Science 8 April 588/2 There is no satisfactory evidence to show that the cells..are really such, and not dividing cleavage cells or possibly vitellophags. 1935[see presumptive a. 3 b]. 1978R. J. Elzinga Fund. Entomol. iv. 86 Some of these nuclei remain behind to become vitellophags, cells for metabolizing yolk for embryonic use.
1886Buck's Handbk. Med. Sci. II. 248/1 *Vitellorubin occurs in an amorphous form, soluble in alcohol to a brown fluid. |