... to this work ‡ Author for correspondence ( mtresguerres@ucsd.edu ) Competing interests The authors declare no competing or financial interests. © 2023. Published by The Company of Biologists Ltd 2023 Inhibition of Na + uptake upon exposure to acidic pH ( Maetz, 1973 ; Shaw, 1960 ) led...

... to [Hb]: (2) The partial pressure of CO 2 in the arterial blood, P a CO 2 , was calculated from [CO 2 ] p , the plasma CO 2 solubility (37.6 µmol l −1  mmHg −1 ; Boutilier et al., 1984 ), pH a and the CO 2 dissociation constant (p K ′=6.78−0.0817×pH a ) for alligator plasma ( Jensen et al...

... remains largely unstudied. We hereby provide the first comparative study of the physical properties of venom in spitting and non-spitting cobras. We measured the viscosity, protein concentration and pH of the venom of 13 cobra species of the genus Naja from Africa and Asia, alongside the spitting elapid...

... and 90 days at three mean pH T levels (total scale): 8.1 (ambient), 7.7 and 7.4. Moderately decreased tube elongation rates were observed in both species at pH T 7.7 while severe reductions occurred at pH T 7.4. There was visual evidence of dissolution and tubes were more fragile at lower pH...

...-accessible carbonic anhydrase may be responsible for the ability of fishes to maintain oxygen transport during high P CO 2  conditions. pH Teleost Metabolic rate Oxygen uptake Root effect Climate change Acidification Freshwater Ocean The concentration of atmospheric carbon dioxide...

.... pH Soluble adenylyl cyclase Carbonic anhydrase Carbon-concentrating mechanism Ocean acidification Osedax The vacuolar-type H + -ATPase (VHA) is a multi-subunit enzyme that is ubiquitous in eukaryotic cells. VHA uses the energy from ATP hydrolysis to drive H + transport against...

...Lina Ceballos-Osuna; Hayley A. Carter; Nathan A. Miller; Jonathon H. Stillman SUMMARY Intertidal zone organisms naturally experience daily fluctuations in pH, presently reaching values beyond what is predicted for open ocean surface waters from ocean acidification (OA) by the year 2100, and thus...

...Hayley A. Carter; Lina Ceballos-Osuna; Nathan A. Miller; Jonathon H. Stillman SUMMARY Absorption of elevated atmospheric CO 2 is causing surface ocean pH to decline, a process known as ocean acidification (OA). To date, few studies have assessed the physiological impacts of OA on early life-history...

... the physiological properties of AquK 2P . In whole cells, non-inactivating, voltage-independent, outwardly rectifying K + currents were generated by external application of micromolar concentrations of arachidonic acid (AA; EC 50 ∼30 μmol l –1 ), when applied in an alkaline solution (≥pH 8.0). Prior activation...

... alone (at equimolar concentration) in both hepatocytes and enterocytes. Cellular accumulation of selenium was found to be energy independent. Interestingly, we observed a decrease in selenite transport with increasing pH, whereas selenite uptake increased with increasing pH in the presence glutathione...

... hypoxaemia, facilitating cross-species comparisons of responses to hypoxia. * Author for correspondence ( bensr@zoology.ubc.ca ) 26 9 2011 © 2012. 2012 respiration metabolic rate haemoglobin P crit P 50 haematology pH CO 2 energy metabolism fish Environmental...

... decreases in liver [ATP], white muscle [CrP] and cardiac pH i as well as significant increases in cardiac and white muscle [lactate], which at 2.0 kPa were only apparent after 4 h of exposure ( Table 2 ; Fig. 4A,B ; Fig. 5A ). Qualitatively, a greater accumulation of plasma and liver [lactate] also...

...B. J. Barth; R. S. Wilson SUMMARY The low pH of naturally acidic aquatic environments is the result of soft-water with low buffering capacity and high concentrations of natural organic acids. Our current understanding of the influence of pH on aquatic organisms is largely limited to laboratory...

...Paul J. Linser; Kristin E. Smith; Terri J. Seron; Marco Neira Oviedo SUMMARY Mosquito larvae use a digestive strategy that is relatively rare in nature. The anterior half of the larval mosquito midgut has a luminal pH that ranges between 10.5 and 11.5. Most other organisms, both large and small...

...Yuchun Gu SUMMARY [Ca 2+ ] i and pH have been demonstrated to affect Na + transport in epithelium mediated via the apical epithelial Na + channel (ENaC). However, it still remains unclear whether the effects of [Ca 2+ ] i and intracellular pH(pH i ) on ENaC activity are direct. In this study...

... of host plant on gut conditions on gypsy moth ( Lymantria dispar ) caterpillars. J. Insect Physiol. 41 , 241 -246. Beesley, S. G., Compton, S. G. and Jones, D. A. ( 1985 ). Rhodanese in insects. J. Chem. Ecol. 11 , 45 -50. Berenbaum, M. R. ( 1980 ). Adaptive significance of midgut pH...

..., we examine the effects of temperature and thermal change on the acid–base status of the lobster hemolymph. Total CO 2 , pH, P CO 2 and HCO – 3 were measured in hemolymph sampled from lobsters acclimated to temperature in the laboratory as well as from lobsters acclimated to seasonal temperatures...

...Michael P. Smith; Ryan A. Dombkowski; Jeffrey T. Wincko; Kenneth R. Olson SUMMARY pH is recognized as a modulator of vascular smooth muscle (VSM) tone in mammalian vessels, but little is known about its effects on fish VSM. We investigated the effects of extracellular and intracellular pH (pH o...

... a microfluorometric method for analysing pH changes at the luminal surface of the secretory epithelial cells by using the fluorescent dye 5- N -hexadecanoyl-aminofluorescein (HAF). After injection of HAF into the lumen of the tubular salivary gland, the fatty acyl chain of the dye molecule partitions into the outer...

...L. K. Hartzler; S. L. Munns; A. F. Bennett; J. W. Hicks SUMMARY A large alkaline tide (up to 20 mmol l –1 increase in bicarbonate concentration [HCO 3 – ] with an accompanied increase in blood pH) has previously been reported for some carnivorous reptiles within 24 h after ingesting a large meal...