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| Celotto,A.C.; Capellini,V.K.; Baldo,C.F.; Dalio,M.B.; Rodrigues,A.J.; Evora,P.R.B.. |
| Acid-base homeostasis maintains systemic arterial pH within a narrow range. Whereas the normal range of pH for clinical laboratories is 7.35-7.45, in vivo pH is maintained within a much narrower range. In clinical and experimental settings, blood pH can vary in response to respiratory or renal impairment. This altered pH promotes changes in vascular smooth muscle tone with impact on circulation and blood pressure control. Changes in pH can be divided into those occurring in the extracellular space (pHo) and those occurring within the intracellular space (pHi), although, extracellular and intracellular compartments influence each other. Consistent with the multiple events involved in the changes in tone produced by altered pHo, including type of vascular... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid-base balance; Nitric oxide; Vascular reactivity; Endothelium; Alkalosis; Acidosis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000600001 |
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| Gomes,Cláudio Luís Nina; Alves,Andressa Mendes; Ribeiro Filho,José Dantas; Moraes Junior,Felipe de Jesus; Chaves,Ricardo de Macedo; Aranha,Rosany Maria Cunha; Fucuta,Rodrigo Santos; Ribeiro,Bruna Maria. |
| ABSTRACT: In horses, acid-base balance disorders are common after intense exercise, with metabolic acidosis being the most common after high intensity and short duration exercise. Understanding the processes that cause them is fundamental for procedures, which aimed to improve the physical fitness of horses for athletic purposes, with fewer changes in homeostasis. The present study assessed the effect of barrel racing on acid base balance in Quarter Horse, at the following times: T0 - immediately before training; T1 - immediately after the end of the second course; T2 - one hour after the end of the second course. In T1, there was decrease (P<0.05) in the pH, HCO3 -, pCO2, cBase, tCO2 and strong ion difference concentrations, while the plasma lactate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Horse; Exercise; Acidosis; Lactate; Barrel racing. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000500601 |
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| Linhares,Jessica Martins; Filippo,Paula Alessandra Di; Bogossian,Paulo Moreira; Guerra,Rafael Vianna Barbosa de Almeida; Bustamante,Sebastian Ricardo Bustamante; Carvalho,Cláudio Baptista de; Ferreira,Felipp da Silveira. |
| ABSTRACT: Acid-base and electrolyte disorders have been described in horses associated during and after exercise. The aim of the present study was to evaluate the effect of cavalcade competition on the acid-base and hydroelectrolytic balance in Mangalarga Marchador horses. For this purpose, 15 geldings, 6.2 ± 1.2 years old and clinically healthy, were distributed into three groups of five animals each. Horses were trained to take part in cavalcade competitions. Animals were submitted to cavalcade along 4km (G4), 8km (G8), and 20km (G20) at mean speeds of 15km h-1, 12km h-1, and 12km h-1, respectively. From each horse, venous blood samples were collected before exercise (T0) and immediately after (T1) cavalcade. Bicarbonate ion (HCO3-), pH, partial pressure... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blood gas; Electrolytes; Equines; Acidosis; Alkalosis; Cavalcade. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500601 |
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| Rossi,Carlo Angelo Sgoifo; Compiani,Riccardo; Baldi,Gianluca; Taylor,Stephen J.; Righi,Federico; Simoni,Marica; Quarantelli,Afro. |
| ABSTRACT This study evaluated the effects of feeding calcareous marine algae or sodium bicarbonate as rumen buffer on the performance, behaviour, in vitro diet digestibility, and meat quality of beef cattle. A total of 180 Charolaise bullocks (536±38 kg; 14±1 months of age) were divided into two homogeneous groups and fed a diet with a mineral mix containing 40% sodium bicarbonate or 20% calcareous marine algae (CMA) for the entire fattening period (130 days). Of the in vivo and in vitro parameters evaluated, CMA supplementation improved average daily gain and feed conversion ratio and reduced the prevalence of bloat and lameness. Bullocks fed CMA tended to exhibit a calmer behaviour while in the pen. Supplementation with CMA improved rumen pH and in vitro... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acidosis; Buffer; Behavior; Digestibility; Lithothamnium; Meat quality. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100719 |
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| Mattiazzi,A.; Mundiña-Weilenmann,C.; Vittone,L.; Said,M.; Kranias,E.G.. |
| The sarcoplasmic reticulum (SR) Ca2+-ATPase (SERCA2a) is under the control of an SR protein named phospholamban (PLN). Dephosphorylated PLN inhibits SERCA2a, whereas phosphorylation of PLN at either the Ser16 site by PKA or the Thr17 site by CaMKII reverses this inhibition, thus increasing SERCA2a activity and the rate of Ca2+ uptake by the SR. This leads to an increase in the velocity of relaxation, SR Ca2+ load and myocardial contractility. In the intact heart, ß-adrenoceptor stimulation results in phosphorylation of PLN at both Ser16 and Thr17 residues. Phosphorylation of the Thr17 residue requires both stimulation of the CaMKII signaling pathways and inhibition of PP1, the major phosphatase that dephosphorylates PLN. These two prerequisites appear to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phospholamban; Thr17 site phosphorylation; SS-adrenergic stimulation; Acidosis; Ischemia. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000500001 |
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| Carvalho,Roberta Ferreira; Mazon,Madeline Rezende; Silva,Ana Paula dos Santos; Oliveira,Leticia Silva; Zotti,Claiton André; Silva,Saulo da Luz e; Leme,Paulo Roberto. |
| ABSTRACT: Additives are used in high concentrate diets to prevent metabolic disorders in cattle. This study was designed to evaluate the effect of calcium sources and monensin on the control of ruminal acidosis in Nellore cattle that were abruptly shifted to a high (92.3%) concentrate diet. Eight cannulated steers were randomly assigned to two contemporary 4x4 Latin square. Treatments involved the addition of a calcium source, either limestone (LI) or a product derived from calcareous algae (CA), to the basic diet with or without the presence of monensin. Calcareous alga (Lithothamnium calcareum) is a natural and renewable product and a source of calcium carbonate. The quantity of added limestone, calcareous algae and monensin was 7.1g kg-1, 7.4g kg-1 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acidosis; Feedlot; High concentrate; Ruminal variables. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400713 |
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