... at different temperatures (26°C, 30°C and 34°C), before being placed in nutrient-replete or -depleted seawater for 24 h. The corals were then incubated with 13 C-labelled sodium bicarbonate and different 15 N-labelled nitrogen forms (ammonium, urea and dissolved free amino acids) to determine...

... a novel liquid membrane NH 4 + -selective microelectrode based on a 19-membered crown compound (TD19C6), which has been used previously in ammonium-selective macroelectrodes. In conjunction with an improved technique for correcting for interference of potassium, NH 4 + -selective microelectrodes based...

... leading to ammonia volatilization in the gut. * Author for correspondence ( [email protected] ) 26 4 2012 8 10 2012 © 2013. 2013 ammonia volatilization chloride–bicarbonate exchanger sodium–proton exchanger sodium–potassium ATPase ammonium The weatherloach...

... and chlorophyll a tissue content) in the common soft coral genus Xenia after a 4-week exposure period to elevated ammonium (N; 20.0 μmol l −1 ), phosphate (P; 2.0 μmol l −1 ) and combined inorganic nutrient enrichment treatment (N+P). Corals maintained without nutrient enrichment served as non-treated controls...

... individual free AA concentrations as indicated by variable ratios among the simultaneous blood samples. Furthermore, the elevation of ammonium and urea in the HPV indicates intestinal catabolism of ingested free AA before release into the HPV. In conclusion, the dual HPV and DA cannulation shows promise...

...Kamel S. Kamel; Surinder Cheema-Dhadli; Mohammad A. Shafiee; Mitchell L. Halperin SUMMARY Two major nitrogenous waste products, urea and ammonium(NH 4 + ), are produced in humans when proteins are oxidized, and in this manuscript their excretions are examined from two perspectives. First...

... © The Company of Biologists Limited 2003 2003 fish rainbow trout Oncorhynchus mykiss critical swimming speed temperature acclimation repeat swimming plasma lactate threshold ammonium An extensive literature exists on the recovery of metabolites and ions following exhaustive...

...J.-T. Wang; A. E. Douglas ABSTRACT When corals and allied animals are deprived of their symbiotic algae, the ammonium content in their tissues rises. This is commonly interpreted as evidence for nitrogen recycling (i.e. algal assimilation of animal waste ammonium into amino acids that are released...

...Jon F. Harrison; John E. Phillips ABSTRACT In this study we characterized acid, ammonium and total urate excretion in the faecal pellets of unfed locusts (Schistocerca gregaria) and examined the effect of haemolymph acidosis (HCl injections into the haemocoel) on net acid and nitrogen excretion...

...-selective electrodes pH sodium potassium calcium ammonium Although the latter type of electrode is suitable for intramyocardial and intravascular recording from animals the size of dogs and pigs ( Hill et al . 1978 ), flexible electrodes with smaller diameters and longer shanks are required...

... limitations of the NH 4 ISM. * To whom correspondence and offprint requests should be sent. 28 01 1991 © 1991 by Company of Biologists 1991 ammonium-selective microelectrodes ammonium intracellular pH regulation stretch receptor crayfish Astacus astacus One...

...Hans-Otto Pörtner ABSTRACT Proton balance is analysed in relation to the anaerobic and aerobic metabolism of carbohydrates, carbonic acids, amino acids and fat by considering oxidation, carboxylation, decarboxylation and phosphorylation reactions, as well as the influence of ammonium, on the acid...