1,721,083 research outputs found
Relative expansion of extracellular water in elite Male athletes compared to recreational sportsmen
No full textThis study reports total body hydration and water distribution between the extracellular water (ECW) and the intracellular water (ICW) of a group of 15 elite male athletes compared with a group of 15 male subjects practising the same sport at 'amateur' level. Total body water (TBW) and ECW were assessed by means of deuterium and bromide dilution techniques respectively. Both TBW and body hydration were significantly higher in elite athletes than in non-competitive subjects (52·3 ± 5·0 vs 46·1 ± 4·2 litres p<0·001 and 63·2 ± 1·9 vs 60·2 ± 1·9% body weight, p<0·003 respectively). Likewise, both ECW the ratio of ECW to TBW were significantly higher in athletes than in control subjects (20·7 ± 2·9 vs 16·1 ± 1·8 litres, p<0·0001 and 0·40 ± 0·06 vs 0·35 ± 0·03, p<0·005 respectively). ICW was similar in both groups but the ICW to ECW ratio was significantly higher in the athletes compared to the recreational sportsmen (0·67 ± 0·16 vs 0·54 ± 0·07, p<0·01). These data suggest that assumptions regarding the chemical composition of the standard human body may not be valid in elite athletes. © 1994 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted
Secretion of serum lipoproteins by isolated rat hepatocytes in culture. Effect of colchicine
No full textBody water distribution and disease
No full textThe study of body water distribution between extra- and intra-cellular spaces has the potential to improve our knowledge on the mechanisms of disease. A major challenge is that of establishing whether commonly detected subclinical alterations of body water distribution have prognostic or clinical implications
Dispositivo di disinfestazione per drenaggi
No full textDispositivo di disinfestazione per drenaggi contro la proliferazione delle zanzare
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
IN-VIVO TOTAL-BODY WATER ASSESSMENT BY TOTAL-BODY ELECTRICAL-CONDUCTIVITY IN RATS SUFFERING PERTURBATIONS OF WATER COMPARTMENT EQUILIBRIUM
No full textTotal body electrical conductivity (TOBEC) is a simple and non-invasive method for the assessment of body composition in vivo. Information regarding the applicability of TOBEC in the condition of abnormal fluid balance is scarce. In the present paper we give the results of the comparison between TOBEC and total body water (TBW; assessed by the tritium dilution technique) in three groups of animals: (1) healthy (n 17), (2) expanded fluid volume by secondary biliary cirrhosis (SBC; n 9) and (3) Furosemide(R)-treated rats (n 9). The TOBEC score and TBW by tritium dilution were found to be highly correlated in the pooled sample (r 0.90) and in normal (r 0.87), SBC (r 0.73) and Furosemide-treated (r 0.89) rats. However, the relationship between TOBEC and TBW, described by least-squares regression analysis, was found to be similar for SBC and normal rats but was significantly different for Furosemide-treated and normal rats. These findings suggest that TOBEC is unable to track TBW accurately when the ratio between intracellular and extracellular water is chronically or acutely altered
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