| 释义 |
isotonicity Physiol.|ˌaɪsəʊtəˈnɪsɪtɪ|
[f. as prec. + -ity.]
The property or state of being isotonic (sense 2); equality of osmotic pressure; also, degree of osmotic pressure (of the blood).
1896T. L. Stedman 20th Cent. Pract. VII. 284 After twelve or twenty-four hours the solution which is exactly isotonic is determined..and the isotonicity of the blood corpuscles..determined at the same time. Ibid., The isotonicity of the corpuscles is 0·45. 1906Amer. Jrnl. Physiol. XV. 366 Every degree of dilution from isotonicity down to distilled water acts as a stimulus to the heart ganglion of Limulus. 1909R. J. M. Buchanan Blood in Health & Dis. ix. 182 The isotonicity of the plasma is rather below normal. 1939A. Krogh Osmotic Regulation Aquatic Animals 196 The isotonicity normally present between tissue cells and the surrounding medium need not mean, however, that the sum of free ions on both sides of the cellular membrane is the same. Ibid. 66 Schwabe (1933)..observed a definite hypotonicity for [the crab] Pachygrapsus marmoratus amounting to 57mM., while he confirmed the absolute isotonicity for Portunus corrugatus. 1951[see hypertonic a. 2]. 1974Nature 4 Jan. 50/1 The concentration of calcium was varied from 0 to 2·5 mM (isotonicity was kept constant by appropriate adjustments in the concentration of NaCl). |