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| (ANP, 1 µM) on the kinetics of bicarbonate reabsorption in the rat middle proximal tubule, we performed in vivo experiments using a stopped-flow microperfusion technique with the determination of lumen pH by Sb microelectrodes. These studies confirmed that ANG II added to the luminal or peritubular capillary perfusion fluid stimulates proximal bicarbonate reabsorption and showed that ANP alone does not affect this process, but impairs the stimulation caused by ANG II. We also studied the effects and the interaction of these hormones in cortical distal nephron acidification. Bicarbonate reabsorption was evaluated by the acidification kinetic technique in early (ED) and late (LD) distal tubules in rats during in vivo stopped-flow microperfusion... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Angiotensin II; ANP; Bicarbonate reabsorption; Cell pH; Cell Ca2+. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000400007 |
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| Ventura,R.R.; Gomes,D.A.; Reis,W.L.; Elias,L.L.K.; Castro,M.; Valença,M.M.; Carnio,E.C.; Rettori,V.; McCann,S.M.; Antunes-Rodrigues,J.. |
| The central nervous system plays an important role in the control of renal sodium excretion. We present here a brief review of physiologic regulation of hydromineral balance and discuss recent results from our laboratory that focus on the participation of nitrergic, vasopressinergic, and oxytocinergic systems in the regulation of water and sodium excretion under different salt intake and hypertonic blood volume expansion (BVE) conditions. High sodium intake induced a significant increase in nitric oxide synthase (NOS) activity in the medial basal hypothalamus and neural lobe, while a low sodium diet decreased NOS activity in the neural lobe, suggesting that central NOS is involved in the control of sodium balance. An increase in plasma concentrations in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vasopressin; Oxytocin; ANP; Nitric oxide; Blood volume expansion; Sodium diet. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000900011 |
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| Fernadez-Tirado, Francisca; Parra-Lopez, Carlos. |
| A variety of opinions either in favour or against development of biofuels has risen in the last years related to the environmental, economic and social impacts that its diffusion could entail compared to petroleum. Although the EU, in general, and Spain, in particular, are strongly supporting the development of biofuels they highlight that energy planning must be based on a sound analysis of the impacts of the diverse alternatives. This poster is a preliminary approach to this analysis. The main aim is to prioritize a set of environmental, economic and social objectives to identify the most relevant issues that would allow evaluating the impacts of the biofuel production and consumption in Spain. Analytic Network Process (ANP) and Analytic Hierarchy... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Biofuel; Sustainability; ANP; Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/44117 |
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| The existence of a circadian rhythm of atrial natriuretic peptide (ANP) in humans is controversial. We studied the plasma ANP response to isotonic blood volume expansion in the morning and in the afternoon and its relationship with adrenocorticotropic hormone (ACTH)-cortisol diurnal variation in seven normal subjects. Basal plasma ANP level was similar in the morning (19.6 ± 2.4 pg/ml) and in the afternoon (21.8 ± 4.8 pg/ml). The ANP peak obtained with saline infusion (0.9% NaCl, 12 ml/kg) in the morning (49.4 ± 8 pg/ml) did not differ from that obtained in the afternoon (60.3 ± 10.1 pg/ml). There was no correlation between the individual mean cortisol and ACTH levels and the ANP peak obtained with saline infusion. These data indicate no diurnal variation... |
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Palavras-chave: ANP; Diurnal variation; ACTH; Cortisol. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000500008 |
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