Retardation of ammonium and potassium transport through a contaminated sand and gravel aquifer: the role of cation exchange

1989 ◽  
Vol 23 (11) ◽  
pp. 1402-1408 ◽  
Author(s):  
Marnie L. Ceazan ◽  
E. Michael Thurman ◽  
Richard L. Smith
Keyword(s):  
Cation Exchange ◽  
Potassium Transport ◽  
Sand And Gravel ◽  
Gravel Aquifer

Transport of Chromium and Selenium in a Pristine Sand and Gravel Aquifer: Role of Adsorption Processes

1995 ◽  
Vol 31 (4) ◽  
pp. 1041-1050 ◽  
Author(s):  
D. B. Kent ◽  
J. A. Davis ◽  
L. C. D. Anderson ◽  
B. A. Rea
Keyword(s):  
Adsorption Processes ◽  
Sand And Gravel ◽  
Gravel Aquifer

scholarly journals Role of Multiple High-Capacity Irrigation Wells on a Surficial Sand and Gravel Aquifer

2016 ◽  
Vol 04 (05) ◽  
pp. 43-53 ◽  
Author(s):  
Logan C. Seipel ◽  
Eric W. Peterson ◽  
David H. Malone ◽  
Jason F. Thomason
Keyword(s):  
High Capacity ◽  
Sand And Gravel ◽  
Gravel Aquifer

The role of extracellular potassium transport in computer models of the ischemic zone

2007 ◽  
Vol 45 (12) ◽  
pp. 1187-1199 ◽  
Author(s):  
Mark Potse ◽  
Ruben Coronel ◽  
A.-Robert LeBlanc ◽  
Alain Vinet
Keyword(s):  
Computer Models ◽  
Potassium Transport ◽  
Extracellular Potassium

Effect of adsorbed metal ions on the transport of Zn- and Ni-EDTA complexes in a sand and gravel aquifer

2002 ◽  
Vol 66 (17) ◽  
pp. 3017-3036 ◽  
Author(s):  
Douglas B. Kent ◽  
James A. Davis ◽  
Linda C.D. Anderson ◽  
Brigid A. Rea ◽  
Jennifer A. Coston
Keyword(s):  
Metal Ions ◽  
Edta Complexes ◽  
Sand And Gravel ◽  
Gravel Aquifer

Regulation of renal Na+-K+-ATPase in the rat: role of increased potassium transport

1986 ◽  
Vol 251 (2) ◽  
pp. F199-F207
Author(s):  
S. K. Mujais ◽  
M. A. Chekal ◽  
J. P. Hayslett ◽  
A. I. Katz
Keyword(s):  
Enzyme Activity ◽  
Atpase Activity ◽  
Potassium Transport ◽  
High Potassium ◽  
Dietary Potassium ◽  
Collecting Tubule ◽  
Physiological Dose ◽  
Potassium Loading ◽  
Cortical Collecting Tubule

The purpose of this study was to characterize the alterations in collecting tubule Na+-K+-ATPase activity produced by sustained increments in dietary potassium in the rat and to evaluate the role of aldosterone in their generation. In adrenal-intact animals, feeding a high-potassium diet (10-fold that of control) or administration of a high physiological dose of aldosterone (5 micrograms X 100 g-1 X day-1), which simulates the delivery rate of this hormone during potassium loading (both for 7 days), caused marked increments in Na+-K+-ATPase activity in the cortical collecting tubule (CCT) but had no effect on the enzyme in the inner stripe of the medullary collecting tubule (MCT). A significant increase in enzyme activity was also observed after smaller dietary potassium increments (2.5 and 5 times the control) and after 4 (but not 2) days of dietary potassium load. In adrenalectomized rats provided with physiological replacement doses of corticosterone and aldosterone (0.8 micrograms X 100 g-1 X day-1), Na+-K+-ATPase activity in both CCT and MCT was similar to that of adrenal-intact controls but remained unchanged after 7 days on the potassium-enriched (10-fold) diet. In contrast, adrenalectomized animals receiving the high physiological dose of aldosterone displayed an increase in Na+-K+-ATPase activity of CCT comparable with that of adrenal-intact animals, whereas the enzyme activity in the MCT was unaffected. In conclusion, 1) following chronic potassium loading Na+-K+-ATPase activity increases significantly in the CCT with no change in its activity in the inner stripe of the MCT.(ABSTRACT TRUNCATED AT 250 WORDS)

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