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. 1903 Excerpt: ...the partial or complete coagulation of the protoplasm. At temperatures lying between 10C. and 30 C. the immediate streaming tempo is usually also the permanent one, provided no other factors come into play, such as an inadequate supply of oxygen, or an insufficiency of food. Under either of these latter circumstances a ...
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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. 1903 Excerpt: ...the partial or complete coagulation of the protoplasm. At temperatures lying between 10C. and 30 C. the immediate streaming tempo is usually also the permanent one, provided no other factors come into play, such as an inadequate supply of oxygen, or an insufficiency of food. Under either of these latter circumstances a rise of temperature brings about a retardation or cessation of streaming sooner than %vould otherwise have been the case. Below 10C. the acceleration due to a rise of temperature is usually not as great as it subsequently becomes. This is probably because the semi-dormant vital activity is not immediately awakened to the full extent possible at the particular temperature, and the same thing commonly occurs as regards growth, photosynthesis, &c., when plants that have been kept at a low temperature for some time are brought into a warm room. In the case of plants in which streaming is usually secondary in character (Elodea, Vallisneria), and less intimately connected with the vitality of the cell than it is in Chara and Nitella, there is a greater tendency to internal changes which modify the natural response to a change of temperature. Thus, if leaves of Elodea are suddenly raised from 18C. to 35 C., streaming commences in one to two minutes, and becomes active in half to one hour. A similar sudden rise to 40 C. produces a more rapid response, although after two to three hours at 40 C. streaming is slower than at 35 C. If now raised to 50 C. the velocity increases slightly in the first one or two minutes, but in fifteen minutes is from to the velocity at 40 C. If now allowed to fall slowly to 30 C. the velocity steadily increases until greater than at any previous temperature. The character of the material, therefore, changed during exper...
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Add this copy of On the Physics and Physiology of Protoplasmic Streaming to cart. $52.97, new condition, Sold by Media Smart rated 4.0 out of 5 stars, ships from Hawthorne, CA, UNITED STATES, published 2019 by Wentworth Press.
Add this copy of On the Physics and Physiology of Protoplasmic Streaming to cart. $61.95, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2019 by Wentworth Press.
