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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from ...Show synopsisThis historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ...I could not determine the relations of the chromatin nucleoli in the rest stage of these cells. In the rest stage of the spermatocyte (PI. V, Fig. 232) is found a large true nucleolus (iV), and separated from it, usually close to the nuclear membrane, a rounded chromatin nucleolus (N. 2). Pole views of the first maturation monaster (Fig. 233) show eleven chromatin elements; sometimes one appears much smaller than the others, and it may represent the chromatin nucleolus. Naucoridje. 41. Pelocoris femorata Pal. Beauv. Fourteen testes of this species were studied from adult and half-grown individuals of difFerent seasons of the year. There were an abundance of rest stages of spermatogonia and of spermatocytes in the growth period, but no maturation mitoses present. The chromosomes were counted in a number of pole views of the monaster stage of the spermatogonia, but in most cases they were so densely grouped as to make the numbers obtained very uncertain. In the most favorable case (PL V, Fig. 234) apparently twenty chromatin elements are present, but I could not be certain of this number. The relations of the chromatin nucleoli in the growth period are very puzzling. On preparations stained with Hermann's saffranine-gentian violet, there appear to be a variable number of rounded bodies of different volume which stain bright red; sometimes they are arranged in pairs, sometimes in long chains, sometimes they show no regular arrangement whatsoever. One nuclear body, much larger than the others and generally irregular in outline, may be a true nucleolus. If all the red-staining bodies are chromatin nucleoli, they would seem to be present in an unusually large number in this species. A study of further material will be necessary to explain the nature...Hide synopsis
A Study of the Chromosomes of the Germ Cells of Metazoa. (Univ. of Pennsylvania. Contrib. from the Zool. Lab.) – Trade paperback
(2012)
by Thomas Harrison Montgomery
A Study of the Chromosomes of the Germ Cells of Metazoa. (Univ. of Pennsylvania. Contrib. from the Zool. Lab.).... – Trade paperback
(2011)
by Thomas Harrison Montgomery
Description:New. This item is printed on demand. This is an EXACT...New. This item is printed on demand. This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as miss.
Description:New. 102 pages. Reprinted from 1901 edition. New 2013 edition...New. 102 pages. Reprinted from 1901 edition. New 2013 edition in PAPERBACK is SEWN PERFECT BOUND, much more durable than a standard paperback. This is a quality reprint of an old book of historical value. If the original book was printed in multiple volumes than this reprint is of only a single volume. This is an exact/strict reproduction of text, no changes has been made in respect to the original text. A lot of effort has been made to check and improve each page/scan manually for its quality of text and illustrations (if any, are in b/w). Folded illustrations, if any, are not included in the book. This is not a retyped or an ocr'd book. Index, contents, etc, if any in the original book, are included. This item is printed on demand using good quality natural shade paper. The title of the book, on the cover, is in gold lettering.
Description:BRAND NEW PAPERBACK. 9.69 by 7 inches. This book is printed on...BRAND NEW PAPERBACK. 9.69 by 7 inches. This book is printed on demand [allow 1-2 weeks for printing]. (00110 pages) [this book may have imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process]lang=english accessory: no accessory (Paperback )
