The experiments to be described were undertaken to devise a simple and rapid technique for the separation of sodium from potassium in human blood serum in order to facilitate the simultaneous measurement of exchangeable sodium and potassium in man by the isotope dilution technique. This technique requires the intravenous administration of a known amount of radioactive sodium (Na24) and radioact...

PREVIOUS STUDIES from this laboratory have indicated that cardiac patients who have been successfully treated for congestive heart failure and who have become free from edema have a larger than normal concentration of sodium in their bodies." 2 The suggestion was advanced that part or all of the sodium excess in such patients represented osmotically inactive cation because the patients studied ...

Sustainability of maize-based cropping systems is a major challenge for southern Africa, yet the demand for maize as staple food and animal feed in the region continues to increase. A study was conducted on a sandy clay loam (220 g clay kg-1 soil) at Domboshawa in Zimbabwe to investigate the long-term effects of organic resource quality and application rate, and nitrogen (N) fertilization on so...

The dysnatraemias are common electrolyte disorders encountered in hospitalized patients [1]. The pathophysiology and approach to management of these electrolyte disorders have been well characterized. It is well known that the total exchangeable sodium (Nae), total exchangeable potassium (Ke) and total body water (TBW) are the major determinants of the plasma water sodium concentration ([Na]pw)...

The study was conducted to assess the impact of mineral fertilizers applied soil on potassium level in components “soil-plant” system sour cherry orchard. experiment forest-steppe zone Central Russian Upland (Orel region) loamy Haplic Luvisol during 2018-2020. seasonal dynamics exchangeable potassiumin soil, status and productivity trees cv. ‘Turgenevka’ rootstock V-2-180 were studied orchard 2...

Several blood-pressure-regulating factors including exchangeable sodium, blood volume, plasma renin, aldosterone, norepinephrine (NE), and epinephrine (E) levels, urinary catecholamine excretion rates, and cardiovascular responsiveness to infused NE and angiotensin II (AII) were compared among age-matched subgroups of normal subjects (15 with normal weight, 15 with overweight) and patients with...

Crop systems and fertilization sources can affect the chemical properties of the soil and, consequently, its fertility. With the aim of evaluating the effect of such management practices, soil samples collected at 0.0-0.10; 0.10-0.20; and 0.20-0.40 m in depth were collected and analyzed in the second year of an experiment installed in 2006 in a Rhodic Hapludox under no-till farming, located in ...