Publications by authors named "M R Urcola"
Article Synopsis
- - The study presents a detailed revision of Philobrya species found along the coasts of Patagonia and surrounding regions based on extensive collections and analysis of their variability.
- - A total of 15 valid species are recognized, including the new species Philobrya delli and a possibly new species, while some previously recognized species are re-evaluated and reclassified as synonyms.
- - The research also designates neotypes and a lectotype to clarify species identities and confirms the synonymy of related genera with Philobrya.
Possible role of carbonic anhydrase, V-H(+)-ATPase, and Cl(-)/HCO3- exchanger in electrogenic ion transport across the gills of the euryhaline crab Chasmagnathus granulatus.
Comp Biochem Physiol A Mol Integr Physiol
November 2005
We studied the participation of carbonic anhydrase (CA), V-H(+)-ATPase, and Cl(-)/HCO3- exchanger in electrogenic ion absorption through the gills of Chasmagnathus granulatus. CA activity was measured in anterior gills and posterior gills after acclimation to 2 per thousand, 10 per thousand, 30 per thousand (about seawater), and 45 per thousand salinity. The highest CA specific activity was detected in the microsomal fraction in anterior gills, and in the cytosolic fraction, in posterior ones.
View Article and Find Full Text PDFWe studied the transepithelial potential difference (TEPD) and (22)Na flux across isolated perfused gills (anterior pair 5 and posterior pairs 6-8) of the crab Chasmagnathus granulatus acclimated to either hypo- or hyper-osmotic conditions. The gills of crabs acclimated to low salinity, perfused and bathed with 10 per thousand saline solutions, produced the following TEPDs (hemolymph side with respect to bath side): 0.4+/-0.
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