The Journal of General Physiology
Scientifica: Experts in Electrophysiology
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents
This Article
Right arrow Full Text (PDF, 442K)
Right arrow Alert me when this article is cited
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Alert me to new content in the JGP
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cooper, Wm. C.
Right arrow Articles by Osterhout, W. J. V.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Cooper, Wm. C., Jr.
Right arrow Articles by Osterhout, W. J. V.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?
The Journal of General Physiology, Vol 14, 117-125, Copyright © 1930 by The Rockefeller University Press

ARTICLE

THE ACCUMULATION OF ELECTROLYTES

I. THE ENTRANCE OF AMMONIA INTO VALONIA MACROPHYSA



Wm. C. Cooper Jr. 1 and W. J. V. Osterhout 1

1 From the Laboratories of The Rockefeller Institute for Medical Research

When 0.005 M NH4Cl is added to sea water containing cells of Valonia macrophysa ammonia soon appears in the sap and may reach a concentration inside over 40 times as great as outside. It appears to enter as undissociated NH3 (or NH4OH) and tends to reach a pseudoequilibrium in which the activity of undissociated NH3 (or NH4OH) is the same inside and outside.

When ammonia first enters, the pH value of the sap rapidly rises but it soon reaches a maximum and subsequently falls off. At the same time there is an increase of halide in the sap which, however, does not run a parallel course to the ammonia accumulation, but it comes to a new equilibrium value and remains constant.

The increase in NH3 in the sap is accompanied by a decrease in the concentration of K.

As NH3 enters the specific gravity of the sap decreases and the cells rise to the surface and continue to grow as floating organisms. The growth of the cells is increased.

 Accepted on June 25, 1930


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?




  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents