Potassium effect on tissue hydration and transpiration in cauliflower

1989 ◽  
Vol 99 (4) ◽  
pp. 313-317
Author(s):  
Sandhya Singh ◽  
C P Sharma
Keyword(s):  
Tissue Hydration ◽  
Potassium Effect

Different abilities to regulate tissue hydration upon osmotic challengein vitro, in the cephalopodsOctopus vulgarisandO. insularis

2015 ◽  
Vol 48 (3) ◽  
pp. 205-211 ◽  
Author(s):  
Enelise Marcelle Amado ◽  
Luciana Rodrigues Souza-Bastos ◽  
Erica Alves Gonzalez Vidal ◽  
Tatiana Silva Leite ◽  
Carolina Arruda Freire
Keyword(s):  
Tissue Hydration

scholarly journals SOME CHEMICAL ASPECTS OF THE POTASSIUM EFFECT

1940 ◽  
Vol 23 (4) ◽  
pp. 429-432 ◽  
Author(s):  
W. J. V. Osterhout
Keyword(s):  
Partition Coefficient ◽  
Organic Substances ◽  
Experimental Control ◽  
Or Groups ◽  
Potassium Effect

The ability of Nitella to distinguish electrically between Na+ and K+ (potassium effect) appears to depend on several organic substances (or groups of substances). Of these RMK and RSK determine the mobility and partition coefficient (S) respectively of K+ while RMNa and RSNa do the same for Na+. These substances can vary independently and this variation is susceptible to experimental control.

The coordinate roles of branchial nerve activity and potassium in the stimulation of ciliary activity in Mytilus edulis: observations with phenoxybenzamine, bromolysergic acid and fluorescence histochemistry

1976 ◽  
Vol 65 (1) ◽  
pp. 109-116
Author(s):  
A. A. Paparo
Keyword(s):  
Mytilus Edulis ◽  
Nerve Stimulation ◽  
High Frequency ◽  
Low Frequency ◽  
Ciliary Activity ◽  
Nerve Activity ◽  
Basal Rate ◽  
Potassium Effect ◽  
Branchial Nerve ◽  
Stimulation Of

Potassium concentrations in excess of 30 mM increase the rate of beating of lateral cilia on the gill of Mytilus edulis. Cilioexcitation produced by low frequency (5 beats/s) electrical stimulation was potentiated with potassium but blocked with bromolysergic acid (a serotonergic inhibitor). Cilioinhibition produced by high frequency (50 beats/s) stimulation was decreased with potassium and phenoxybenzamine (a dopaminergic inhibitor). Phenoxybenzamine enhanced the cilioexcitation produced by potassium. Potassium doses incapable of maintaining a basal rate of beating (less than 30 mM) could increase ciliary activity if phenoxybenzamine was also added. After transection of the branchial nerve, the yellow-fluorophore (serotonergic storage) and cilioexcitatory effect of potassium gradually decrease. This study shows that the potassium effect on ciliary activity (a) increase with low frequency nerve stimulation, presumably through the release of serotonin and (b) decreases with high frequency nerve stimulation, presumably through the release of dopamine.

The Influence of Bath Environment on the Fluid Content of Human and Rabbit Patellar Tendons

2000 ◽  
Author(s):  
Rajakumar Israel ◽  
Theresa Atkinson
Keyword(s):  
Mechanical Properties ◽  
Weight Gain ◽  
Exposure Time ◽  
Critical Factor ◽  
Distilled Water ◽  
Test Environment ◽  
Important Conclusion ◽  
Fluid Content ◽  
Tissue Hydration ◽  
Over Time

Abstract Recent studies have shown that the mechanical properties of tendons and ligaments are dependent on the amount of fluid present in the tissue. These studies have used a variety of bath environments to maintain or alter the fluid content of the tissue. However, no study has measured the effect of these baths on the fluid content of the specimen. In addition, no study has documented the influence of test environment on sectioned versus whole specimens. This experiment investigated the effect of saline, distilled water and sucrose baths on human and rabbit patellar tendons. Specimens were placed into the baths, and weight gain over time was measured. The results show that all specimens gained weight, and thus fluid, over time. The results further show that human specimens absorbed fluid at a faster rate than rabbit specimens. An important conclusion of this study is that exposure time in a bath is a critical factor in tissue hydration. Significant differences in absorption rates between divided and whole specimens were also found.

Sign in / Sign up

Export Citation Format

Share Document