A Chemical Sign of Life
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In our eReader you can find the full English version of the book. Read A Chemical Sign of Life Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Chemical Sign of Life
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The seed thus stimu- lated showed a marked acceleration of its respiration. If two apparently living kernels of wheat are taken and one of them is crushed and their carbon dioxide produc- tion is compared in the biometer, the crushed one always produces more carbon dioxide than the normal one. That this is a vital response is shown by the fact that only living seeds behave in this way. If one takes two kernels of any similar seed, which have been killed in an elec- trical oven heated to 60 C. ,... and one of them is crushed, there is no difference in the carbon dioxide output of the two seeds. The difference in amount of carbon dioxide produced by crushing cannot be observed in dead seeds or in anesthetized seeds. In this respect a seed and a nerve are alike; the chemical signs of irritability are identical. Both, as long as they are alive, respond to a mechanical stimulation by producing more carbon dioxide.
CHEMICAL SIGNS OF LIFE 91 Is an injury a stimulation? Are we justified in regarding the increase of carbon dioxide following injury by crushing as in the same category as the increase of carbon dioxide production by ordinary stimulation?
What to read after A Chemical Sign of Life?
You can find similar books in the "Read Also" column, or choose other free books by Shiro Tashiro to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The seed thus stimu- lated showed a marked acceleration of its respiration. If two apparently living kernels of wheat are taken and one of them is crushed and their carbon dioxide produc- tion is compared in the biometer, the crushed one always produces more carbon dioxide than the normal one. That this is a vital response is shown by the fact that only living seeds behave in this way. If one takes two kernels of any similar seed, which have been killed in an elec- trical oven heated to 60 C. ,... and one of them is crushed, there is no difference in the carbon dioxide output of the two seeds. The difference in amount of carbon dioxide produced by crushing cannot be observed in dead seeds or in anesthetized seeds. In this respect a seed and a nerve are alike; the chemical signs of irritability are identical. Both, as long as they are alive, respond to a mechanical stimulation by producing more carbon dioxide.
CHEMICAL SIGNS OF LIFE 91 Is an injury a stimulation? Are we justified in regarding the increase of carbon dioxide following injury by crushing as in the same category as the increase of carbon dioxide production by ordinary stimulation?
What to read after A Chemical Sign of Life?
You can find similar books in the "Read Also" column, or choose other free books by Shiro Tashiro to read onlineMoreLess
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