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Cleft lip and palate malformations: essential knowledge for the general practitioner
Item type: Journal Article • Journal: South African Family Practice • Authors: MGC Giaquinto-Cilliers --- Department of Plastic Surgery and Burns Unit, MD Potgieter --- Department of Plastic Surgery and Burns Unit, DA Links --- Department of Plastic Surgery and Burns Unit, GI Van Schalkwyk --- Department of Plastic Surgery and Burns Unit,Cleft lip and palate malformations are a common group of congenital abnormalities, and are therefore frequently encountered by the general practitioner, who is often the primary coordinator in the management of these patients. This is especially true in a South... -
Xenopus laevis embryos and tadpoles as models for testing for pollution by zinc, copper, lead and cadmium
Item type: Journal Article • Journal: African Zoology • Authors: Lorren K. Haywood --- Ecophysiological Studies Research Group, School of Animal, South Africa Graham J. Alexander --- Ecophysiological Studies Research Group, School of Animal, South Africa Marcus J. Byrne --- Ecophysiological Studies Research Group, School of Animal, South Africa Ewa Cukrowska --- School of Chemistry, South AfricaThe toxicity of bio available Zn, Cu, Pb, and Cd on the life stages of Xenopus laevis embryos and tadpoles was investigated. Cu and Cd were found to affect the hatching success of the embryos, with a strong negative relationship... -
Xenopus laevis embryos and tadpoles as biological indicators of acidic waters
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: LorrenK. Haywood --- University of the Witwatersrand, South AfricaXenopus laevis embryos and tadpoles show graded responses in terms of their hatching success, growth rate and incidence of malformations when exposed to acidity. These responses mean that they are good bioindicators of acidic waters. Exposure to a pH less...