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A.K. Mohammed
Thirty-six <I>Bunaji</I> work bulls aged 4 to 6 years old, belonging to 18 agropastoral farmers in Kaduna State, Nigeria were used to investigate changes in haematological and serum biochemical parameters before and immediately after farmland ridging exercise. Significant (p< 0.01) elevations in Packed Cell Volume (PCV), Red Blood Cell (RBC), ...
Connes Philippe - - 2007
Exercise and lactate usually change blood rheology, particularly red blood cell (RBC) deformability. The effect of lactate on RBC aggregation is unknown. The present study tested the in vivo effects of exercise on both lactate and RBC aggregation and the in vitro effects of lactate on RBC aggregation. Thirteen well ...
Gotthardt M - - 2007
AIM: Ultrasound may be a cheap alternative to scintigraphic determination of splenic function. We directly compared nanocolloid scintigraphy (NS), scintigraphy with heat-altered erythrocytes (ES), and colour-coded Doppler sonography (DS) in patients with chronic inflammatory bowel disease (CIBD). PATIENTS, METHODS: 35 patients were included into the study. Clearance rates were determined ...
Rovira S - - 2007
This research assesses the relative contribution of splenic contraction and fluid shifts out of the vascular compartment to the increases in packed cell volume associated with Agility exercises. It also aims to evaluate the changes in the concentrations of electrolytes and markers of hydration state. Fifteen dogs of both sexes ...
Drouin Jacqueline S - - 2006
BACKGROUND: Erythrocyte changes from aerobic exercise training were examined during radiation treatment of breast cancer. METHODS: Twenty sedentary females with breast carcinoma who were ages 35 to 65 years were randomized to aerobic exercise (AE) of walking for 20 to 45 minutes, 3 to 5 times per week, at 50% ...
Richards Ross S - - 2007
BACKGROUND: It has been hypothesized that a link exists between erythrocyte metabolism (particularly redox metabolism) and erythrocyte shape and that both are related to erythrocyte deformability. The aim of this research is to confirm the results of earlier studies and to investigate a correlation between erythrocyte morphology and erythrocyte oxidative ...
Ferreira Leonardo F - - 2007
The aim of this study was to examine the effects of assuming constant reduced scattering coefficient (mu'(s)) on the muscle oxygenation response to incremental exercise and its recovery kinetics. Fifteen subjects (age: 24 +/- 5 yr) underwent incremental cycling exercise. Frequency domain near-infrared spectroscopy (NIRS) was used to estimate deoxyhemoglobin ...
Bayly W M - - 2006
REASONS FOR PERFORMING STUDY: Horses experience major perturbations in acid-base balance during supramaximal exercise. Ion movement in and out of erythrocytes (RBCs) is believed to be important in maintaining acid-base balance but it is unclear as to the extent to which this happens, nor how it affects single measurements of ...
Sterns Richard H - - 2006
Hyponatremia exerts most of its clinical effects on the brain. An acute onset (usually in <24 hours) of hyponatremia causes severe, and sometimes fatal, cerebral edema. Given time, the brain adapts to hyponatremia, permitting survival despite extraordinarily low serum sodium concentrations. Adaptation to severe hyponatremia is critically dependent on the ...
Grose Heather L - - 2006
BACKGROUND: An automated cell processing system (ACP 215, Haemonetics Corp.) can be used for the glycerolization and deglycerolization of RBC components, but the components must be 6 or fewer days old. Depending on the anticoagulant (CP2D)/additive solution (AS) used, deglycerolized RBCs can be stored at 1 to 6 degrees C ...
Madison Barry N - - 2006
Nitrite (NO2-) is a toxic intermediary of the bacterial oxidation of nitrogenous wastes (e.g. ammonia) in an aquatic environment. It becomes most lethal when oxygen becomes limited due to high fish densities or in the presence of high bacterial activity due to waste build-up-both situations commonly found in intensive aquaculture. ...
Connes Philippe - - 2006
This study compared the hemorheological profile at rest and in response to a short supramaximal exercise test between sickle cell trait (SCT) carriers and a control group. Eight SCT carriers and eight control subjects performed a ramp exercise test on a cycle ergometer conducted to maximal oxygen uptake (VO2max). One ...
Tsukanaka, Atsuko
TSUKANAKA, A, UMEMURA, Y, ISHIKO, T, and MATUI, N, Changes in Serum Haptoglobin Concentration by Treadmill-running and Ergometer-cycling. Adv. Exerc. Sports Physiol, Vol.6, No.1 pp.1-6, 2000. The purpose of this study was to investigate 1) whether footstrike impacts induce hemolysis, and 2) whether runner's erythricytes are more fragile than those ...
Bush Jill A - - 2006
This study was the first study to examine the three circulatory biocompartments (plasma, white blood cell layer (WBC) and red blood cell layer (RBC)) and determine PF concentrations before and after exercise. Proenkephalin peptide F (PF) is an enkephalin-containing peptide found predominantly within the adrenal medulla. PF is co-packaged with ...
Rodriguez-Proteau R - - 2006
The hypothesis tested was that specific flavonoids such as epicatechin gallate, epigallocatechin gallate, genistein, genistin, naringenin, naringin, quercetin and xanthohumol will modulate cellular uptake and permeability (P(e)) of multidrug-resistant substrates, cyclosporin A (CSA) and digoxin, across Caco-2 and MDCKII-MDR1 cell transport models. (3)H-CSA/(3)H-digoxin transport and uptake experiments were performed with ...
Petroianu G A - - 2006
Oximes are cholinesterase reactivators of use in poisoning with organophosphorus compounds. Pralidoxime (PRX) is used clinically as an adjunct to atropine in such exposure. Clinical experience with PRX (and other oximes) is, however, disappointing and routine use has been questioned. In addition it is known that oximes are not equally ...
Hess J R - - 2006
BACKGROUND: Red blood cell (RBC) storage solutions work in a narrow pH range between 7.2 and 6.4. While keeping RBC within that pH range, ATP production can be increased by buffering or dilution. STUDY DESIGN AND METHODS: In the first study, 12 units of packed CP2D RBCs were pooled in ...
Julian David - - 2005
Sulfide-tolerant marine invertebrates employ a variety of mechanisms to detoxify sulfide once it has entered their bodies, but their integumentary, respiratory epithelium and circulatory cells may still be exposed to toxic sulfide concentrations. To investigate whether sulfide exposure is toxic to mitochondria of a sulfide-tolerant invertebrate, we used the fluorescent ...
Temiz Artmann A - - 2006
Erythrocytes (RBC) from untrained male Wistar rats and rat glomerular endothelial cells (EC) were used to investigate the effects of acute exercise (speed: 20 m/min, slope: 0, duration: 1 hour) on RBC membrane protein oxidation and adhesion to cultured EC. Experimental animals were divided into juvenile (age 10 weeks) and ...
Beneke Ralph - - 2005
The pathophysiology of exercise related haemolysis is not thoroughly understood. We investigated whether exercise related haemolysis (1) is associated with alterations of red blood cell (RBC) membrane proteins similar to those found in inherited anaemic diseases, (2) can be induced with a non-running exercise mode, (3) is related to exercise ...
Petibois Cyril - - 2005
BACKGROUND: We tested the hypothesis that endurance training may reduce exercise oxidative stress damage on erythrocytes. METHODS: Fifteen subjects performed a standardized endurance exercise at 75% of maximal oxygen consumption weekly during a 19-week training period. Blood samples taken before and after exercise were analyzed by Fourier transform-infrared (FT-IR) spectrometry ...
Petibois Cyril - - 2005
We tested the hypothesis that usual exercise oxidative stress strongly affects erythrocytes viability. A 120-min physical exercise with progressive intensity was used as a model of oxidative stress. FT-IR spectrometry was used to determine structural changes in erythrocyte contents (phospholipids, proteins, lactate, and glucose) from blood samples taken every 20 ...
Monchanin Géraldine - - 2005
PURPOSE: This study investigated hemorheological parameters in response to exercise in sickle cell trait (SCT) athletes with or without alpha-thalassemia METHODS: Six athletes with SCT (HbAS), 7 athletes with SCT and alpha-thalassemia (HbASAT), and 10 control athletes (HbAA) performed a progressive and maximal exercise test on cycloergometer. Blood viscosity (etab), ...
Kayatekin Berkant Muammer - - 2005
This study aimed to determine whether high-dose antioxidant supplementation had an impact on the acute exercise effects related to erythrocyte membrane mechanics. Experimental animals (n=32) were divided into four groups as control, exercised, supplemented, and supplemented + exercise. Four-week antioxidant supplementation (vitamin C, vitamin E, and zinc) was applied to ...
Sentürk Umit Kemal - - 2005
Intravascular hemolysis is one of the most emphasized mechanisms for destruction of erythrocytes during and after physical activity. Exercise-induced oxidative stress has been proposed among the different factors for explaining exercise-induced hemolysis. The validity of oxidative stress following exhaustive cycling exercise on erythrocyte damage was investigated in sedentary and trained ...
Richardson Matt - - 2005
Human splenic contraction occurs both during apnea and maximal exercise, increasing the circulating erythrocyte volume. We investigated the hematological responses to 3 maximal apneas performed by elite apneic divers, elite cross-country skiers, and untrained subjects. Post-apnea hemoglobin concentration had increased in all groups, but especially in divers. The increases disappeared ...
Pattillo Robin E - - 2005
This study determined and compared rates and mechanisms of lactate transport in red blood cells (RBCs) of persons with 1) sickle cell disease (HbSS), 2) sickle cell trait (HbAS), and 3) a control group (HbAA). Blood samples were drawn from 30 African-American volunteers (10 HbSS, 10 HbAS, 10 HbAA). Lactate ...
Lukaski Henry C - - 2005
BACKGROUND: The role of zinc in promoting physiologic function during exercise is not well understood. Although some zinc-containing enzymes are postulated to regulate energy expenditure, data are limited on the effect of restricted dietary zinc on metabolic responses during exercise. OBJECTIVE: This study determined the effects of low zinc intake ...
Friedrich Björn - - 2005
Standard haemodialysis (HD) rapidly alters osmolality and composition of extracellular fluid and, thus, challenges cell volume constancy. Cell volume-sensitive genes upregulated by osmotic cell shrinkage include those encoding for taurine transporter TAUT as well as for serum- and glucocorticoid-inducible kinase SGK1. Six HD patients were haemodialysed for 4 h with ...
Kennedy Sarah L - - 2005
INTRODUCTION/PURPOSE: Exercise modulates many aspects of physiology. The purpose of the current experiment was to characterize the impact of regular, moderate physical activity on resting, baseline measures of cellular immunity blood lipids, and muscle enzyme. METHODS: Male Fischer 344 rats were housed with either mobile (run, N = 10) or ...
Stoiber B - - 2005
In situations where capillary perfusion in skeletal muscles is limited, changes in blood flow play an important role. Especially alterations in intrinsic erythrocyte factors like red cell aggregation and deformability would increase blood flow resistance. In our study we investigated whether whole blood and plasma viscosity influence exercise tolerance during ...
Dumay Olivier - - 2004
The concentration of phenolic compound was measured in the seagrass Posidonia oceanica when interacting with two Bryopsidophyceae, Caulerpa taxifolia and Caulerpa racemosa, between May 1999 and May 2000. These measurements were performed on adult and intermediate leaves and in sheaths of the seagrass. Sampling was carried out at three stations ...
Bergeron Michael F - - 2004
OBJECTIVE: To examine effects of exercise in the heat and fluid intake on erythrocyte sickling and neutrophil activation in carriers of sickle cell trait (HbAS). DESIGN, SETTING, AND PARTICIPANTS: Six African American men (2 HbAS; 42% HbS, 4 HbAA; 20.7 +/- 0.8 years; 87.4 +/- 9.6 kg) participated in 2 ...
Pawlotsky Yves - - 2004
The aim of the study was to simplify the first Sigma erythrocyte sedimentation rate (ESR) method (manual hematocrit adjustment to 0.35, sum of 4 sedimentation levels) and to confirm its clinical relevance. The erythrocyte sedimentation rate of undiluted blood samples from 576 patients was measured simultaneously with and without manual ...
Connes P - - 2004
Several studies have suggested that athletes with low hemoglobin saturation during exercise may experience impaired pulmonary blood gas exchange during maximal exercise. Blood viscosity may be implicated in exercise-induced pulmonary hemorrhage in race horses. We hypothesized that blood rheology may contribute to impaired gas exchange and reduced hemoglobin saturation during ...
Ferrone Frank A - - 2004
Under physiological conditions, sickle hemoglobin, a natural mutant of human hemoglobin A with a surface hydrophobic valine in place of a negatively charged glutamic acid, polymerizes at high volume occupancy. Equilibrium solubility of sickle hemoglobin entails activity coefficients that can approach 10(3) at high concentrations. Polymerization occurs by homogeneous and ...
Moshelion Menachem - - 2004
The osmotic water permeability coefficient (P(f)) of plasma membrane of maize (Zea mays) Black Mexican Sweet protoplasts changed dynamically during a hypoosmotic challenge, as revealed using a model-based computational approach. The best-fitting model had three free parameters: initial P(f), P(f) rate-of-change (slope(P(f))), and a delay, which were hypothesized to reflect ...
Aoi W - - 2004
We investigated the effect of sustained swimming exercise on the increase in monocarboxylate transporter 1 (MCT1) concentration and its ability to regulate pH homeostasis in rat erythrocytes. Male Sprague-Dawley rats aged 9 weeks were divided into sedentary and swimming groups for both 1- and 3-week experiments. The exercise group swam ...
Boselli Emanuele - - 2004
Monomeric phenols, color and copigmentation parameters, pigments with different chemical structure, tannin, glucose, fructose, glycerol, ethanol, and organic acids were determined in DOC red wines from Marche (Italy), obtained during three different vintages ranging from 1996 to 2000. The intensity of the bitter and astringent tastes of the wines was ...
Koury Josely C - - 2004
The purpose of this study was to compare zinc and copper biochemical indices of antioxidant status and their relationship in elite athletes of different modalities: aerobic with high-impact (triathletes, n = 10 and long-distance runners, n = 12), anaerobic with high-impact (short-distance runners, n = 9), and anaerobic with low-impact ...
Eike Julie H - - 2004
Various oxidized mono/di/tri/poly saccharides were studied as potential hemoglobin (Hb) cross-linkers in order to produce oxygen carriers with high oxygen affinities (low P(50)'s) and high molecular weights (therefore lower macromolecular diffusivities compared to tetrameric Hb). Such physical properties were desired to produce polymerized hemoglobins (PolyHbs) with oxygen release profiles similar ...
Wettstein Reto - - 2004
Microcirculatory perfusion deficits and impaired tissue oxygenation in nonvital organs frequently occur after hemorrhage and they contribute to potentially lethal complications. The aim of this study was to test the influence of colloid osmotic pressure, viscosity, and red blood cell (RBC) content of the resuscitative fluid on metabolic disorder, perfusion, ...
Connes Philippe - - 2004
Exercise transiently increases blood viscosity: however data on red cell deformability in this process remain inconsistent, since studies report either impairment (proportional to blood lactate accumulation), a lack of effect, or even in some cases an improvement. To test whether these inconsistencies may be due to physiological differences among populations ...
Svenmarker S - - 2004
BACKGROUND: Measurement of the activated clotting time (ACT) represents a standard method for coagulatory assessments. The test employs specific agents to trigger the coagulation process. The present study aimed to compare kaolin (Hemotec) versus a combination of silica, kaolin and phospholipid (Hemochron Jr) ACTs. METHODS: Hemotec and Hemochron Jr ACT ...
Martin-Romero Francisco Javier - - 2004
The production of peroxynitrite during 3-morpholinosydnonimine (SIN-1) decomposition can be continuously monitored, with a sensitivity < or = 0.1 microM, from the kinetics of NADH fluorescence quenching in phosphate buffers, as well as in buffers commonly used with cell cultures, like Locke's buffer or Dulbecco's modified Eagle's medium (DMEM-F12). The ...
Varlet-Marie Emmanuelle - - 2004
Blood lactate increases during exercise. Although this increase was classically interpreted as a "Pasteur-like effect" resulting from anaerobiosis, it is now clear that it mostly results from a shift in the balance of oxidation of substrates in the muscle, with carbohydrate becoming the predominant fuel. However, we have repeatedly observed ...
Varlet-Marie Emanuelle - - 2004
Contemporary sports imply huge training volumes, with thus an increasing danger of overloading. The timely detection of the state of overloading in the organism as a whole or in skeletal muscles presents a difficult and complicated problem. A standardized questionnaire has been proposed by the French consensus group on overtraining ...
Lindinger Michael I - - 2003
We tested the hypothesis that exercise-induced changes in plasma composition result in peak stimulation of erythrocyte unidirectional K+ (JK,in) and net K+ (JK,net) transport within the first 120 s. In experimental series 1 (7 men; 2 women), plasma [K+] was continuously measured in vitro (37 degrees C) after the addition ...
Valeri C Robert - - 2003
BACKGROUND: RBC volume, 24-hour posttransfusion survival, and life span can be measured with radio-isotopes and nonradioactive procedures. STUDY DESIGN AND METHODS: RBC volume was measured directly with autologous baboon RBCs labeled with biotin-X-N-hydroxysuccinimide (NHS), 51Cr, 99mTc, and 111In-oxine and indirectly from the 125I plasma volume and the total body Hct. ...
Bonacker Daniela - - 2004
In order to investigate the chromosomal genotoxicity of nitrobenzene and benzonitrile, we studied the induction of micronuclei (MN) by these test compounds in V79 cells, as well as effects on the formation and stability of microtubules and on motor protein functions. No cytotoxicity was seen in V79 cell cultures in ...
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