Download ebook The Biological Bulletin Volume 25
Download ebook The Biological Bulletin Volume 25
The Biological Bulletin Volume 25.cMarine Biological Laboratory
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Author: Marine Biological Laboratory
Page Count: 108 pages
Published Date: 21 May 2012
Publisher: Not Avail
Publication Country: Miami Fl, United States
Language: Englishhttps://d20eq91zdmkqd.cloudfront.net/assets/images/book/large/9781/1301/9781130179576.jpg
ISBN: 9781236360663
File size: 11 Mb
File Name: The.Biological.Bulletin.Volume.25.pdf
Download Link: The Biological Bulletin Volume 25
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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 the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...first in certain definite regions of the body while other regions are still alive and show movement and it follows a more or less regular course (Child, '13a). The five stages are briefly characterized as follows: I. Intact, no disintegration. II. Disintegration beginning, usually in head region. III. Body beginning to disintegrate but form still retained. IV. Margins disintegrated, form disappearing in consequence of swelling of tissues and separation of cells. V. All epithelium and pigment gone; swelling of tissues has extended to all parts and original form has disappeared. The distinction of these stages makes it possible to compare different lots of worms more closely than if only the time of complete disintegration were noted. In Table I. Lot I consists of ten worms 1.5-2 mm. in length, which had emerged from cysts within three or four days preceding and had been fed once with pieces of earthworm after emergence. Lot 2 consists of ten worms 13-15 mm. which had been raised in the laboratory from cysts with earthworm as food and were almost ready to encyst again. It is evident at once from the table that the resistance of the worms of Lot I recently emerged from cysts is very much less than that of the large worms of Lot 2. Disintegration begins in Lot I after one and one half hours in KCN, while the worms of Lot 2 are still intact and slowly moving about. In Lot 2 disintegration begins after three hours. All the worms of Lot I are completely disintegrated after three and one half hours, those of Lot 2 after seven and one half hours, i. e., the survival time of Lot 2 is nearly double that of Lot 1. In other words the worms of Lot 1 have a much higher rate of metabolism than those of Lot 2. That the difference in size of the worms is not responsible for ...
Read online The Biological Bulletin Volume 25 Buy The Biological Bulletin Volume 25 Download and read The Biological Bulletin Volume 25 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook The Biological Bulletin Volume 25 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
The Biological Bulletin Volume 25.cMarine Biological Laboratory
Author: Marine Biological Laboratory
Page Count: 108 pages
Published Date: 21 May 2012
Publisher: Not Avail
Publication Country: Miami Fl, United States
Language: Englishhttps://d20eq91zdmkqd.cloudfront.net/assets/images/book/large/9781/1301/9781130179576.jpg
ISBN: 9781236360663
File size: 11 Mb
File Name: The.Biological.Bulletin.Volume.25.pdf
Download Link: The Biological Bulletin Volume 25
---------------------------------------------------------------
This 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. 1913 Excerpt: ...first in certain definite regions of the body while other regions are still alive and show movement and it follows a more or less regular course (Child, '13a). The five stages are briefly characterized as follows: I. Intact, no disintegration. II. Disintegration beginning, usually in head region. III. Body beginning to disintegrate but form still retained. IV. Margins disintegrated, form disappearing in consequence of swelling of tissues and separation of cells. V. All epithelium and pigment gone; swelling of tissues has extended to all parts and original form has disappeared. The distinction of these stages makes it possible to compare different lots of worms more closely than if only the time of complete disintegration were noted. In Table I. Lot I consists of ten worms 1.5-2 mm. in length, which had emerged from cysts within three or four days preceding and had been fed once with pieces of earthworm after emergence. Lot 2 consists of ten worms 13-15 mm. which had been raised in the laboratory from cysts with earthworm as food and were almost ready to encyst again. It is evident at once from the table that the resistance of the worms of Lot I recently emerged from cysts is very much less than that of the large worms of Lot 2. Disintegration begins in Lot I after one and one half hours in KCN, while the worms of Lot 2 are still intact and slowly moving about. In Lot 2 disintegration begins after three hours. All the worms of Lot I are completely disintegrated after three and one half hours, those of Lot 2 after seven and one half hours, i. e., the survival time of Lot 2 is nearly double that of Lot 1. In other words the worms of Lot 1 have a much higher rate of metabolism than those of Lot 2. That the difference in size of the worms is not responsible for ...
Read online The Biological Bulletin Volume 25 Buy The Biological Bulletin Volume 25 Download and read The Biological Bulletin Volume 25 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook The Biological Bulletin Volume 25 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent