File:Analysis of development (1955) (18166597062).jpg

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Title: Analysis of development
Identifier: analysisofdevelo00will (find matches)
Year: 1955 (1950s)
Authors: Willier, Benjamin H. (Benjamin Harrison), b. 1890
Subjects: Embryology; Embryology
Publisher: Philadelphia, Saunders
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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268 Fig. 103. Embryogenesis: Progressive Differentiation Fig. 104.
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Fig. 105. Fig. 106. Fig. 103. Induction of symmetrical brain parts and eye by mouse kidney, boiled for 15 minutes and im- planted in the blastocoele of an early gastrula of Triturus (from Chuang, '39). Fig. 104. Induction of tail in posterior trunk region of Triturus, obtained by implantation of mouse kidney which had been killed by dipping briefly in boiled water (from Chuang, '39). Fig. 105. Induction of a neural tube by 3,4-benzpyrene, using coagulated egg albumen as a carrier. Axial organs of host above, and induced neural tube adjacent to transplant below. (From Needham, '42, after Waddington.) Fig. 106. Heteroplastic induction of balancer, a. Larva of Triturus cristatus. The prospective head epider- mis on the right side had been replaced in the early gastrula by prospective belly epidermis of Triturus taeniatus. The right balancer induced in the transplant by underlying T. cristatus structures is of T. taeniatus type. Notice its size, shape, direction of outgrowth, absence of terminal club, b. Normal larva of Triturus taeniatus, for comparison. (From Rotmann, '35a.) ney, thyroid of some mammals) induced preferentially spinocaudal strvictures. Less conspicuous and complex inductions were ob- tained with grafted tissues from various in- vertebrates. Inactive were agar, starch, glycogen, wax, charcoal. Similar results were obtained by Need- ham, Waddington and Needham ('34) and Wehmeier ('34) on urodeles, and by Rau- nich ('42b) on anurans. The implantation of plant tissues (cambium, root tip) pro- duced merely ectodermal thickenings (Rago- sina, '37; Toivonen, '38); but Brachet ('43, '50) obtained neuralizations by applying nucleoprotein fractions from yeast and wheat embryos.

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  • bookid:analysisofdevelo00will
  • bookyear:1955
  • bookdecade:1950
  • bookcentury:1900
  • bookauthor:Willier_Benjamin_H_Benjamin_Harrison_b_1890
  • booksubject:Embryology
  • bookpublisher:Philadelphia_Saunders
  • bookcontributor:MBLWHOI_Library
  • booksponsor:MBLWHOI_Library
  • bookleafnumber:286
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
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27 May 2015

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