...Cosima S. Porteus; Christina C. Roggatz; Zelia Velez; Jörg D. Hardege; Peter C. Hubbard ABSTRACT In the past decade, many studies have investigated the effects of low pH/high CO 2 as a proxy for ocean acidification on olfactory-mediated behaviours of marine organisms. The effects of ocean...

... (RBC CA) activity limits the rate of intracellular acidification, yet its role in O 2 delivery has been downplayed. We developed an in vitro assay to manipulate RBC CA activity while measuring Hb-O 2 offloading following a physiologically relevant CO 2 -induced acidification. RBC CA activity in red...

...Kelly D. Hannan; Jodie L. Rummer ABSTRACT Aquatic acidification, caused by elevating levels of atmospheric carbon dioxide (CO 2 ), is increasing in both freshwater and marine ecosystems worldwide. However, few studies have examined how acidification will affect oxygen (O 2 ) transport...

... Maternal effects Acidification Stress Summary: Ambient calcium is declining in thousands of soft-water lake habitats. Daphnia females provision their offspring with calcium and through that incur a potential allocation trade-off. © 2015. Published by The Company of Biologists Ltd 2015...

... still remain unclear. In the present study, we show that future predictions of ocean warming (+4°C) and acidification (ΔpH=0.5 units) may compromise the development of early life stages of a highly commercial teleost fish, Solea senegalensis . Exposure to future conditions caused a decline in hatching...

... the endocytotic pathway that retrieves proteins from the glomerular ultrafiltrate requires V-ATPase-dependent acidification of post-endocytotic vesicles. The regulation of both of these activities depends upon the ability of cells to monitor the pH and/or bicarbonate content of their extracellular environment...

.... longipalpis females to be 6.0, proving that the gut is acidic when blood is not being digested( Gontijo et al., 1998 ). In addition to the acidification, the phlebotomine saliva could act on Leishmania promastigotes in the absence of haemin, driving them to a differentiation pathway, as proposed by Charlab...

...Joseph A. Covi; W. Dale Treleaven; Steven C. Hand SUMMARY The metabolic downregulation critical for long-term survival of Artemia franciscana embryos under anoxia is mediated, in part, by a progressive intracellular acidification. However, very little is known about the mechanisms responsible...

...Joseph A. Covi; Steven C. Hand SUMMARY Under anoxia, Artemia franciscana embryos downregulate metabolic processes and approach an ametabolic state. Entrance into this quiescent state is accompanied by a profound acidification of the intracellular space, and more than two decades of research now...

... are addressing these questions using a combination of genetic and biochemical approaches. * e-mail: [email protected] 19 10 1999 13 12 1999 © 2000 by Company of Biologists 2000 V-ATPase regulation assembly yeast acidification carbon source Saccharomyces cerevisiae...

... pole of the epithelial cells. This was observed throughout the feeding period of the fifth-instar larva until the onset of spinning. Acidification was prevented completely and reversibly by 0.8 μmol l −1 bafilomycin A 1 , a specific inhibitor of V-ATPase. The presence of V-ATPase in a microsomal...

... and bacterial plasma membranes and are inhibited by azide. vacuolar-type ATPases H + -ATPases lepidopteran midgut acidification alkalization Protons migrate much faster than other ions through water, ice and water-lined membrane channels because they participate in hydrogen bonding and H + H 2 O...

... complex responsible for acidifying the fungal vacuole and to summarize the current view of the function of acidification of the vacuolar network. © 1992 by Company of Biologists 1992 vacuole vacuolar ATPase acidification fungal vacuole The fungal vacuole is a prominent organelle...

...Patricia M. Kane ABSTRACT Achieving an understanding of the biosynthesis, assembly and intracellular targeting of the vacuolar H + -ATPase is critical for understanding the distribution of acidic compartments and the regulation of organelle acidification. The assembly of the yeast vacuolar H...

...Hong Lin; David Randall ABSTRACT Ion transport inhibitors, amiloride, SITS, vanadate and acetazolamide, were added to the water to determine the effect of ion transfer mechanisms on the acidification of water passing over the gills. In neutral water, proton excretion causes a marked reduction...

...Hong Lin; D. J. Randall ABSTRACT Acidification of expired water was studied in rainbow trout exposed to water of pH9.91, 6.80 (control) and 3.88. For the high-pH and the control exposures, the water flowing over the gills was acidified because of the dominant effect of CO 2 hydration. During...

...Leona Mattsoff; Mikko Nikinmaa ABSTRACT We studied the effects of acute external acidification on the acid-base status and plasma and red cell ion concentrations of lampreys. Mortality was observed within 24 h at pH5 and especially at pH4. The main reason for the high sensitivity of lampreys...