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Biomedical subjects

G Wallis

Publications and source records attributed to G Wallis.

42 records · Page 3Linked to original sources
PubMed1983

Spondylo-epimetaphyseal dysplasia with joint laxity and severe, progressive kyphoscoliosis. A potentially lethal dwarfing disorder.

A progressive and potentially lethal skeletal dysplasia, spondylo-epimetaphyseal dysplasia with joint laxity (SEMDJL), has been recognized in 18 children from the Afrikaner community of South Africa. This serious disorder, which is inherited as an autosomal recessive trait, warrants diagnostic consideration whenever an infant or child from this population group presents with dwarfism, deformity, articular hypermobility and spinal malalignment. In view of the clinical and genetic implications, diagnostic precision is of great importance.

Bone Diseases, Developmental↗
PubMed1982

Variability in urinary mercury excretion.

This report investigates quantitatively the extent to which 24-hour urinary mercury excretion can be predicted from the concentration of mercury in spot samples. The correlation between these quantities can be significantly improved by the application of a correction for urinary dilution and by restricting spot samples to the day's first excretion. If these precautions are taken, we find that for 68% of the samples the 24-hour excretion, Q, is in the range of 0.75 C' less than Q less than 1.31 C', where C' is the mercury concentration of a day's first excretion. The width of this range appears to be primarily determined by variations in a person's daily urinary volume and by the frequent occurrence of diurnal cycles.

Environmental Exposure↗
PubMed1981

The syndrome of Capgras.

Three new cases of the syndrome of Capgras are presented. An unusual variant of the syndrome is recorded. It is contended that the definition of the syndrome should be widened to include impersonators who exhibit slight differences from the prototype, and that ambivalence and projection cannot explain all cases. The syndrome is critically reviewed.

Adult↗
PubMed1980

Detection of mercury in air in the presence of chlorine and water vapor.

Evidence is presented that low concentrations of mercury and chlorine vapor in air form reaction products. At constant mercury concentration the rate of formation increases with chlorine concentration and relative humidity. The mercury-chlorine compound as well as the vapor of elemental mercury are absorbed by Hopcalite or by KMnO4-H2SO4 scrubber solution. The compound can be separated from mercury vapor by its absorption in polyurethane or by filtration by means of Millipore aerosol membranes.

Air↗