The bremsstrahlung high-energy cutoff of strontium and yttrium decay processes is determined to be 2306 ± 37 keV. The linear relation of Moseley’s law for X-ray fluorescence is verified using rubidium, molybdenum, silver, barium, and terbium targets. The fluorescent X-ray emission energies of other known targets are also verified to generally within 3 standard errors for under 0.6% relative err...

Rubidium concentrations in seawater from various locations and depths to 3,900 m have been determined using two independent techniques--direct flame photometry and mass spectrometry. Results of these two techniques agree within estimated errors and indicate that the rubidium content in the oceans is uniform within H$% with values varying about 120 pg/liter. Sediment from the sea floor below a d...

To study the short-term uptake of potassium across the basolateral membrane into individual tubule cells, rubidium was used and measured by electron microprobe analysis. Changes of rubidium uptake were interpreted to reflect altered sodium entry and basolateral Na-K-ATPase activity. The effects of hydrochlorothiazide, amiloride and furosemide were determined in saline-loaded animals. Hydrochlor...

BACKGROUND Depression may induce malnutrition, but, as a paradoxical hypothesis, malnutrition may induce depression. This relationship, of course, depends on how we define malnutrition. CURRENT KNOWLEDGE Rubidium is a trace element strongly linked with depression, and is deficient in uremia sufferers. However, in uremic patients, rubidium deficiency is more evident during predialysis, as it i...

IN THE DEVELOPMENT OF OUABAIN INHIBITION OF RUBIDIUM INFLUX IN HUMAN RED BLOOD CELLS A TIME LAG CAN BE DETECTED WHICH IS A FUNCTION OF AT LEAST THREE VARIABLES: the concentrations of external sodium, rubidium, and ouabain. The inhibition is antagonized by rubidium and favored by sodium. Similar considerations could be applied to the binding of ouabain to membrane sites. The total influx of rubi...

The effects of 0.3-10 nM extracellular protons (pH 9.5-8.0) on ouabain-sensitive rubidium influx were determined in 4,4'-diisocyanostilbene-2, 2'-disulfonate (DIDS)-treated human and rat erythrocytes. This treatment clamps the intracellular H. We found that rubidium binds much better to the protonated pump than the unprotonated pump; 13-fold better in rat and 34-fold better in human erythrocyte...

From determinations of radioactivity and potassium content at intervals after the injection of Rb, it was inferred that most organs of the dog contained exchangeable rubidium in a concentration paralleling but exceeding that of potassium, as compared with their relative concentrations in the plasma. A "lag phenomenon" resulting in higher rubidium specific activity in the myocardium than plasma ...

1. We have measured cation transport in vivo in seven healthy volunteers under control conditions and after they had taken lithium carbonate for 21 days in doses which maintained the serum lithium concentration in the range 0.6-0.8 mmol/l. 2. We have measured cation transport in vivo after the administration of an oral load of rubidium chloride, and have found that, although intra-erythrocytic ...