电解质的积累：III. 缬草中钠、钾和铵的行为。

THE ACCUMULATION OF ELECTROLYTES : III. BEHAVIOR OF SODIUM, POTASSIUM, AND AMMONIUM IN VALONIA.

机构信息

Laboratories of The Rockefeller Institute for Medical Research.

出版信息

J Gen Physiol. 1930 Nov 20;14(2):301-14. doi: 10.1085/jgp.14.2.301.

DOI:10.1085/jgp.14.2.301

PMID:19872587

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2141109/

Abstract

When 0.001 M NH(4)Cl is added to sea water containing Valonia macrophysa there seems to be a rapid penetration of undissociated NH(3) (or NH(4)OH) which raises the pH value of the sap so that the thermodynamic potential of KOH becomes greater inside than outside and in consequence K leaves the cell: NaOH continues to go in because its thermodynamic potential is greater outside than inside. NH(4)Cl accumulates, reaching a much higher concentration inside than outside. This might be explained on the ground that NH(3), after entering, combines with a weak organic acid produced in the cell whose anion is exchanged for the Cl(-) of the sea water, or (more probably) the organic acid is exchanged for HCl.

摘要

当 0.001 M 的 NH(4)Cl 被加入含有 Valonia macrophysa 的海水中时，似乎会有未离解的 NH(3)（或 NH(4)OH）迅速渗透，从而提高了汁液的 pH 值，使得 KOH 的热力学势在细胞内大于细胞外，因此 K 离开细胞：NaOH 继续进入，因为其热力学势在细胞外大于细胞内。NH(4)Cl 积累，在细胞内达到比细胞外高得多的浓度。这可以解释为，NH(3)进入后与细胞内产生的一种弱有机酸结合，其阴离子被海水中的 Cl(-)交换，或者（更可能的是）有机酸被交换为 HCl。