| 释义 |
superfusion|s(j)uːpəˈfjuːʒən|
[ad. late L. superfūsio, -ōnem, n. of action f. superfūs-, superfundĕre to superfuse.]
1. [super- 2.]
a. The action or operation of pouring liquid, etc. over something. Also fig.
1657J. Watts Scribe, Pharisee, etc. iii. 68 Our way of superfusion, or aspersion with water. 1867J. W. Hales in Farrar Ess. Lib. Educ. 307 Is what is called classical instruction at our schools anything better than a more or less copious superfusion of facts? 1871G. H. Napheys Prev. & Cure Dis. ii. ii. 455 In cases of delirium tremens with high fever, what is called cold superfusion may be used while the patient is held in the warm bath.
b. Med. The technique of causing a stream of liquid to run over the surface of a piece of suspended tissue, keeping it viable and allowing the interchange of substances between it and the fluid to be observed.
1953Brit. Jrnl. Pharmacol. & Chemotherapy VIII. 321/1 A piece of intestine may be suspended in air and kept in good condition by a stream of a suitable solution running over its surface... This technique may be called superfusion, since the fluid runs over the tissue, by analogy with perfusion, in which the fluid runs through the tissue. 1970Proc. Soc. Exper. Biol. & Med. CXXXIII. 1373/2 Continuous superfusion of a single pituitary gland might also permit new approaches to the study of mechanisms and dynamics of LH release. 1980Nature 3 Jan. 92/2 Superfusion of these slices for 2 min with Krebs' solution containing added KCl..increased the tritium overflow.
2. [super- 4.] The cooling of a liquid below its melting-point without solidification taking place.
1866Sci. Rev. Dec. 145/3 There is..a marked difference between the circumstances in which solidification takes place in superfusion and supersaturation. 1880W. C. Roberts Introd. Metallurgy 31 The cooling mass of molten metal does not ‘flash’ or pass through the remarkable state known as ‘superfusion.’ |