1993 Distinguished Scientific Achievement Award. Presented to Robert Loevinger.
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Awards and Prizes↗
Biomedical subjects
J Poston
Publications and source records attributed to J Poston.
Clay occlusion of respirable quartz particles detected by low voltage scanning electron microscopy-X-ray analysis.
Respirable-sized dust particles from a clay mine and mill were examined for aluminium and silicon content by scanning electron microscopy-energy dispersive X-ray analysis at incident electron energies of 5-20 keV. Most of the high silica content particles, those which had a silicon to silicon plus aluminium signal fraction, measured at 20 keV, of 0.9 or greater, showed a decrease in the silicon fraction of signal with decreasing incident electron energy, down to values of between 0.6 and 0.8 at 5 keV: this decrease was a function of particle size and composition. Simple models for silicon fraction of signal vs incident electron voltage suggest this behaviour is due to a heterogeneous particle structure in which an aluminosilicate coating occludes the surface of a silica particle core. The coating survives incubation in a major component of pulmonary surfactant.
Aluminum Silicates↗
Sharp debridement of devitalized tissue: the nurse's role.
It is important that any devitalized tissue is removed from a wound as soon as possible. For most patients, the presence of non-viable tissue is distressing as it can produce a noxious odour and frequently an unacceptable discharge. The devitalized tissue provides a suitable culture medium for bacterial growth, and wounds containing necrotic tissue are therefore at risk of becoming clinically infected. Various methods of both conventional and unconventional removal of non-viable tissue are discussed briefly. However, this article is mainly concerned with the removal of devitalized tissue using sharp instruments. It focuses on the implications of this procedure for nurses who take on this responsibility. Sharp debridement of devitalized tissue has traditionally been an acceptable procedure for medical staff to perform. This article discusses the practical requirements and theoretical knowledge that are necessary for the procedure to be performed successfully. It proposes that, in the patient's best interest, the experienced and competent nurse may be the most suitable practitioner to perform this activity.
Chronic Disease↗