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Biomedical subjects

D H Clarke

Publications and source records attributed to D H Clarke.

At least 37 records · Page 2Linked to original sources
PubMed1980

Physiological characteristics of young well-trained swimmers.

The purpose of this study was to describe body composition, muscular strength, pulmonary function, and aerobic capacity of young swimmers, after 6 years of training. Twelve male members of a competitive swim team, ranging in age for 13 to 16 years, served as subjects. Each subject was measured on 2 separate days at approximately the same time of day on each occasion. On day one, body composition, muscular strength, TLC, FVC, FEV1.0, FRC, RV, and resting DLc0 were determined. On day 2, height, weight, VE max Hr max, and VO2 max were measured. Results indicated that children who train to swim competitively: (1) are lower than average in percent body fat (10.8%) as determined by hydrostatic weighing, (2) are muscularly fit as indicated by the Oregon Cable-Tension Strength Test, and (3) have cardiorespiratory capacities which are greater than one would expect to see in untrained youth of similar ages.

Adolescent↗
PubMed1978

Cardiorespiratory alterations in 9 to 11 years old children following a season of competitive swimming.

The purpose of this study was to describe cardiorespiratory alterations in a group of perviously untrained 9-to-11 year old children resulting from seven months of swimming training. Fifteen members of a competitive swim team served as subjects. A non-training group of fifteen children of similar age, height and weight were studied at the same times. All measurements were made on three separate days both before and after the training period. On Measurement Day One the subjects were measured for VC, FEV1.0, and MVV. On MEasurement Day Two they were measured for PWC170 and on MEasurement Day Three height (cm), weight (kg), VE max (1/min), Vo2 max (ml/kg.min) and HR max were determined. Results of the analyses indicated that: (1) the mean PWC170 change in the trained children (+80.00 kgm/min) was significantly greater than that in the reference group (+30.00 kgm/min) (P less than .05); (2) the mean Vo2 max change in the experimental group (+8.411 ml/kg.min) was significantly greater than in the reference group (2.21 ml/kg.min) (P less than .01); and the mean changes in VC, FEV1.0, MVV, VE max, and HR max were not greater than one would expect to see in normal children of similar age and body dimensions (P greater than .05).

Child↗
PubMed1977

Salt-dependent hemagglutination with Bunyaviridae antigens.

Hemagglutination titers of antigens from nine serologic groups of Bunyaviridae were increased by hypertonic NaCl. The effect was predominantly on sonically treated antigens and was additive with the increase from sonic treatment alone.

Antigens, Viral↗
PubMed1971

Hemagglutination inhibition with arboviruses: relationship between titers and source of erythrocytes.

Antigens for Grand Arbaud, Hazara, and California arboviruses were able to agglutinate goose and either dog, hamster and guinea pig, or hamster red blood cells (RBC) to the same titer at the same pH; in hemagglutination-inhibition (HI) tests, titers for homologous and related sera were the same with these different types of RBC or occasionally one dilution higher with the mammalian cells. Antigens for St. Louis encephalitis and Eastern equine encephalitis viruses required use of lower antigen dilutions with human, guinea pig, and hamster RBC than with goose RBC. The results of comparative HI testing with these latter antigens and types of RBC indicate that HI titer is not directly related to the antigen dilution used with different types of RBC.

Animals↗