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Biomedical subjects

J Booyens

Publications and source records attributed to J Booyens.

49 records · Page 3Linked to original sources

Skinfold thickness measurements in assessment of nutritional status of Indian and White schoolchildren.

A statistical comparison is presented between height, weight, and subscapular and triceps skinfold thickness for age of Indian and White schoolchildren. It was found that (i) although a high degree of correlation existed between height and weight for age of White children, this was not true for Indian children; (ii) for both White and Indian children of both sexes inconsistent variations occurred between both height and weight and skinfold thickness; (iii) despite extremely low heights and weights observed for Indian children, which could be interpreted as depicting chronic undernutrition, the skinfold thicknesses of the latter children were close to normal as judged by conventional standards: the subscapular skinfold thicknesses in Indian girls actually exceeded the conventionally accepted normal standard values. It is concluded that in the indirect assessment of nutritional status of Indian subjects, anthropometric variables should be used with caution. Finally, it is proposed that further anthropometric and individual energy balance studies be conducted on a cross-section of various socio-economic, age and sex groups of the Indian population in an attempt to establish the basis for the described anomalies.

Body Height↗

The relationship between weight at birth, anthropometric data and reading age of white schoolchildren.

The relationship between weight at birth, reading ability and present weight in a group of 220 junior primary schoolchildren from a predominantly professional-class Westville population, was investigated. No statistical correlation was found between these variables. In view of the high birth weights of the children in this study, it is suggested that the phenomenon of intellectual stunting of low birth weight children (less than 2000 g), which has been reported from Scotland and the USA, may not present a problem in children from affluent populations, such as those of the present study.

Anthropometry↗

The relationship between scholastic progress and nutritional status. Part I. A study of 488 school beginners.

The reading progress of 488 Chatsworth Indian school beginners, in relation to their nutritional status, was assessed. It was found that the majority of the children were grossly growth-retarded and some 90% of them could be classified as slow learners. The significance of these findings is discussed. It is recommended that dietary supplementation be introduced for preschool as well as for school-going children in communities where growth retardation is prevalent.

Achievement↗

The relationship between scholastic progress and nutritional status. Part II. A one-year follow-up study.

A 1-year follow-up study was conducted on a group of Indian children who were initially identified as being grossly anthropometrically stunted, and who had severe problems in reading after having attended school for 1 year. It was found that after an additional year's schooling virtually no improvement, either in the ability to read or in anthropometric status, had occurred. It is suggested that as a matter of urgency educationists, sociologists and physiologists should confer to take cognizance of the recent, extremely important findings pertaining to permanent intellectual stunting resulting from chronic malnutrition of infants up to their 4th postnatal year.

Achievement↗

The effect of acid-stimulating and inhibiting drugs on the ultrastructure of gastric parietal cells in man.

The ultrastructure of the human parietal cell at rest, after stimulation of gastric acid secretion by pentagastrin and after inhibition with propantheline or cimetidine, an H2-receptor antagonist, was studied. On stimulation there was an increase in the total secretory surface area of the gastric gland and canaliculus, with a concomitant decrease in the tubulovesicular system. On inhibition there was a decrease in the secretory surface area and a corresponding increase in the tubulovesicular system. These results are in agreement with other reports and support the hypothesis that during secretion of acid the tubulovesicular system increases the secretory surface by eversion or fusion of the vesicles and tubules with the plasmalemma. On inhibition there is thought to be reformation of the tubulovesicular system by pinocytosis. There is also ultrastructural evidence for the theory of membrane flow between the tubulovesicular system and the microvilli of the canaliculus and gastric lumen. Furthermore, there was an increase in lysosomal activity after the administration of the inhibiting drugs. It is suggested that the increased lysosomal activity could be involved in reducing the quantity of membrane after the membrane flow which occurs on gastric acid inhibition.

Depression, Chemical↗