Hypothyroid rats were examined with conventional renal clearance and micropuncture techniques to elicit the mechanism and site within the nephron responsible for the increased salt and water excretion observed in these animals. When compared with age-matched control rats, a decrease in inulin clearance of 30% (P < 0.001) and in Hippuran clearance of 32% (P < 0.005) was observed in the hypothyro...

The glycoprotein (GP) IIb-IIIa complex was isolated from human platelet membranes by immunoaffinity chromatography using a monoclonal antibody specific for GP IIb-IIIa. GP IIb and IIIa were further separated in the presence of sodium dodecyl sulfate (SDS) by gel filtration high-performance liquid chromatography (HPLC). Two cycles of this procedure yielded almost complete separation of homogeneo...

In hypertensive rats, environmental stress causes sodium retention by an exaggerated increase in renal sympathetic nerve activity, which is modulated by angiotensin II. We tested whether similar effects can be observed in humans. In 66 normotensive subjects (half of them with a family history of hypertension) and 36 subjects with mild essential hypertension, urinary sodium excretion and renal h...

We have recently demonstrated that in the normal dog infusion of isotonic or hypertonic saline results in marked depression of sodium reabsorption in the proximal tubule (1). This depression is independent of the effect of saline infusion on filtration rate and is not blocked by reduction of filtration rate. Such depression in proximal tubule reabsorption appears to account for the diuresis kno...

We have purified the membrane-intrinsic glycerol3-phosphate dehydrogenase from both normal and hyperthyroid rat liver mitochondria by extraction with Triton X-100, hydrophobic affinity chromatography, ion exchange chromatography, gel filtration, and FAD-linked Sepharose 4B affinity chromatography. The yields in both cases were over 20‘70, and purification ranged from 800to 650-fold in mitocho...

An investigation was undertaken in pentobarbitone-anaesthetized rats to determine the sub-type of alpha-adrenoceptor responsible for the renal nerve-induced increases in the reabsorption of calcium and sodium by the tubules of the kidney. Stimulation of the renal nerves at low frequencies (0.8-1.5 Hz) did not change either renal blood flow or glomerular filtration rate but significantly reduced...

The ultra-fast (30C or 2 min) rate capability and impressive long cycle life (>5000 cycles) of Na2Ti6O13 are reported. A stable 2.5 V sodium-ion battery full cell is demonstrated. In addition, the sodium storage mechanism and thermal stability of Na2Ti6O13 are discussed.

OBJECTIVE To investigate the in vitro effects of the antibacterial drugs, meropenem trihydrate, piperacillin sodium, and cefoperazone sodium, on the activity of human serum paraoxonase (hPON1). METHODS hPON1 was purified from human serum using simple chromatographic methods, including DEAE-Sephadex anion exchange and Sephadex G-200 gel filtration chromatography. RESULTS The three antibacter...

A rational approach to the diuretic therapy of ascites is proposed. Fifty-five patients were classified according to their ability to excrete sodium and free water. Patients with a high urinary sodium excretion can be treated by low sodium intake alone. In most patients with a low sodium excretion but high free water clearance, distal diuretics (spironolactone or triamterene) with a low sodium ...

Large decreases in the rates of sodium excretion, chloride excretion, and glomerular filtration were observed in patients with orthostatic hypotension when they assumed the upright posture following a period of recumbency. When they returned to the recumbent position, sodium excretion typically was not restored immediately in spite of immediate restoration of filtered sodium load. The decreased...