Potassium transference in Nitella.
نویسندگان
چکیده
منابع مشابه
Potassium transference in Nitella
Transmembrane movements of K+ and Cl- were studied under a variety of experimental conditions. Potassium was found to carry more than 50% of an externally applied inward positive current. The increase in K+ influx was much greater than that predicted by the purely passive model. The increase in Cl- efflux accounted for less than 10% of the applied current, in agreement with the value predicted ...
متن کاملPotassium Transference in NiteUa
I N T R O D U C T I O N This study is concerned with the relationship of K + fluxes to the electrically measured membrane conductance and the level o f the resting potential of giant internodal cells of Nitella. In such studies it has been customary to assume that electrogenic ion p u m p i n g is present and that a relatively large passive re turn cur rent serves to electrically balance it. Th...
متن کاملIntracellular Potassium Compartments in Nitella Axillaris
Three intracellular compartments for potassium exchange have been observed in intact cells of the giant-celled alga, Nitella axillaris. These compartments have been compared with the exchange properties of isolated subcellular structures. The smallest and fastest compartment (apparent half-time, 23 seconds) appears to involve passive absorption on the cell wall. The next largest (apparent half-...
متن کاملSeparation of Potassium Isotopes in Valonia and Nitella
The ratio of K(39) / K(41) appears to be lower in the sap of Valonia and Nitella than in the environment, indicating that the living cell can separate these isotopes to some extent. Experiments with a mixture of guaiacol and p-cresol suggest that a similar separation may occur here but further experiments are needed.
متن کاملTransference, transference interpretations, and transference-focused psychotherapies.
The concept of transference and the use of transference interpretations in psychotherapy have been highly controversial topics garnering frequent attention both within psychoanalysis and across multiple orientations of psychotherapy. In this article, we review the empirical evidence as it bears on this controversy and discuss the implications of the evidence for psychoanalysis, psychodynamic ps...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1978
ISSN: 0022-1295,1540-7748
DOI: 10.1085/jgp.72.2.203