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Biomedical subjects

C E Wilson

Publications and source records attributed to C E Wilson.

36 records · Page 2Linked to original sources
PubMed1969

Sodium and potassium distribution in puffer fish supramedullary nerve cell bodies.

The Na and K concentration in single supramedullary neurons of the puffer fish (Spheroides maculatus) was measured using a dual channel integrating ultramicroflame photometer. The cells were frozen in situ, sectioned at low temperatures, and freeze-dried to prevent artefactual movements of cations. The density of the nuclear fragments was 0.15, significantly less than cytoplasm's 0.21. The sucrose-(14)C "space" was 2.1-4.7% in cytoplasm fragments and 0.9-2.1% in nuclear fragments. The K concentration in cytoplasm averaged 134 mmoles/liter tissue volume and in nuclei, 113. The Na concentration in cytoplasm fragments varied between 56 and 138 mmoles/liter per tissue volume; in nuclei between 40 and 135, and in perineural tissue between 55 and 114. This intracellular Na is several times greater than the Na concentration expected from previous estimates. It is probable, however, that the intracellular Na activity is less than half that of the Na concentration, suggesting that much of the intracellular Na is bound to organic molecules within the cell.

Animals↗
PubMedDate not supplied

Cree infant care practices and sudden infant death syndrome.

OBJECTIVE: To identify contemporary Cree infant care practices and any risk factors associated with Sudden Infant Death Syndrome. METHODS: A questionnaire conducted and recorded in the homes of 70 Cree women (83% of sample available) with infants under 12 months of age, living full time on a Cree reserve. Participatory observation was also used with mothers who agreed to demonstrate certain features of Cree infant care. FINDINGS: 70% of mothers initiated breast-feeding and 43% nursed from 6 to 15 months. Cree infants are tightly swaddled and placed in a supine position for sleeping. Prenatal care is seldom utilized because of cultural beliefs that planning ahead constitutes bad luck during birth or results in deformed infants. CONCLUSIONS: Existing infant care practices include several that are considered protective to an infant in terms of reducing vulnerability to SIDS. Swaddling infants in very warm houses and smoking during pregnancy could contribute to a higher SIDS incidence.

Adolescent↗