... in controlling rectal gland secretion in vitro . In vivo , acetazolamide inhibited Cl - secretion and decreased pHi in the rectal gland, but interpretation was confounded by an accompanying systemic respiratory acidosis, which would also have contributed to the inhibition. In the perfused gland, \batchmode...

... =7.692-0.132 x, r 2 =0.211), diamonds represent liver ( y =7.618-0.111 x, r 2 =0.247) and squares represent white muscle ( y =7.388-0.045 x,r 2 =0.045). Fig. 5. The relationship between tissue intracellular pH (pHi) and whole blood pH (pHe) in L. pardalis exposed to a water PCO2 of 14 and 32 mmHg...

...). The contributions of various proton-translocating mechanisms to homeostasis of intracellular pH (pHi) were assessed by adding specific inhibitors of the various proton-translocating mechanisms at a constant extracellular pH (pHe)of 7.4 and after artificial acidification of the cells using the ammonium pulse...

... in isolated body wall musculature of the marine worm Sipunculus nudus under control conditions (pHe 7.90) and during steady-state extracellular acidosis (pHe 7.50 or 7.20) by in vivo 31 P-NMR and oxygen consumption analyses. During acute hypercapnia (2 % CO 2 ), recovery of pHi was delayed at pHe 7.5 compared...

...B. Fossat; J. Porthé-Nibelle; S. Pedersen; B. Lahlou ABSTRACT The ability of rainbow trout liver cells to regulate their intracellular pH (pHi) was studied using two methods on hepatocytes isolated by collagenase digestion: (i) by monitoring pHi with the fluorescent dye BCECF-AM, and (ii...

.... Nevertheless, the model was able to simulate the typical pattern of muscle acidosis and recovery observed for trout, including the transient post-exercise acidification and the slow recovery rate. As with previous pHi models, comparison of model estimates with experimental observations is essential...

...F. J. Sartoris; H. O. Pörtner ABSTRACT The effects of temperature (0, 5, 10, 15 and 20 °C) and of anoxia (at 5 °C) on extracellular Mg 2+ concentration ([Mg 2+ ] e ), intracellular pH (pHi) and ATP and lactate levels were investigated in intermoult adults of the common shrimp Crangon crangon . All...

.... Overcompensation occurred, so that by 8–12 h, metabolic alkalosis prevailed, but by 24 h, resting acid-base status had been restored. Acid-base changes were similar, and lactate levels identical, in arterial and venous blood. However, at rest venous RBC pHi was significantly higher than arterial (7·42 versus 7·31...

...C. Louise Milligan; Chris M. Wood ABSTRACT Exhaustive ‘burst-type’ exercise in the rainbow trout resulted in a severe acidosis in the white muscle, with pHi dropping from 7·21 to a low of 6·62, as measured by DMO distribution. An accumulation of lactate and pyruvate, depletions of glycogen, ATP...