... and revealed constant uptake rates for particulate organic carbon (POC) (−0.315±0.161 mg POC m −2 coral surface area h −1), particulate nitrogen (PN) (−0.053±0.018 mg PN m −2 h −1) and dissolved organic carbon (DOC) (−4.8±2.1 mg DOC m −2 h −1). Although DOC uptake significantly increased in the N treatment...

...Claire Godinot; Renaud Grover; Denis Allemand; Christine Ferrier-Pagès SUMMARY Several untested aspects of the regulation of inorganic nutrient uptake were examined using nutrient depletion experiments with the symbiotic coral Stylophora pistillata . The total inhibition of phosphate uptake...

... N-enriched DFAAs, and % 15 N enrichment was measured both in animal tissue and zooxanthellae at different DFAA concentrations,incubation time and light levels. As previously observed for urea, which is another source of organic nitrogen, DFAA uptake exhibited a biphasic mode consisting of an active...

... © The Company of Biologists Limited 2007 2007 cell division egg extracellular fertilization Hsp70 Hsc70 hypotonic shock mitosis nucleus nuclear envelope breakdown immune response Lytechinus variegatus sea urchin uptake wound response All cells respond to heat and other...

.... The effects of amino acids upon intestinal zinc uptake in freshwater rainbow trout (Oncorhynchus mykiss) were studied using an in vivo perfusion technique. The presence of histidine, cysteine and taurine had distinct modifying actions upon quantitative and qualitative zinc absorption, compared to perfusion...

... inability to reduce ion efflux and adjust ion absorption rates to maintain hemolymph ion balance. In contrast, C. quinquefasciatus exhibited a reduced ion efflux and the ability to upregulate Na + uptake, traits necessary to extend its lower salinity limit. *e-mail: [email protected] 3 7 2001...

... transport site for Zn and Ca at the apical membrane of the gill epithelium and suggest that there is a certain degree of coregulation of branchial Zn and Ca uptake in rainbow trout. Removal of Ca from the water resulted in a large (six-to 24-fold) increase in affinity (decreased K m) for Zn influx...

...Declan W. Ali; Ian Orchard ABSTRACT The uptake and release characteristics of dopamine and serotonin in the salivary glands of the locust Locusta migratoria were examined. Cyclic AMP levels were determined in salivary glands in which the salivary nerve was stimulated under different experimental...

...I. D. Hume; W. H. Karasov; B. W. Darken ABSTRACT We have measured unidirectional uptake (not transmural flux) of acetate, butyrate and proline by everted sleeves of intact tissue from the jejunum, caecum, proximal colon and distal colon of prairie voles (Microtus ochrogaster). There was active (i.e...

... sample from uncannulated trout exposed to radiolabelled Zn in the water. Trout acclimated to tapwater (Ca 2+ = 2·0 mequiv P 1) and exposed to Zn (1·5–45·9 /μequiv I −1 ; 0·05–1·5 mg I −1) showed saturable uptake which was apparently first order with no significant linear component. The apparent J max...