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Intestinal polyps appear to be relatively rare in the African including Nigerians, South African Bantus, and Ugandans. Only 40 histologically confirmed cases were encountered over a period of ten years. Analysis of these cases reveals a preponderance (60%) of the non-neoplastic juvenile type of polyp. Neoplastic polyps were not encountered in any female(More)
Three commercial disinfectants (two quaternary formulations and one phenolic) were tested against human hepatitis B virus (HHBV). The treated virus was assayed for infectivity by the chimpanzee assay and for morphological alteration by the Morphological Alteration and Disintegration Test. The same agents were tested against duck hepatitis B virus in a duck(More)
Species of Proteus, Serratia, and Pseudomonas became resistant to chlorhexidine after five to eight transfers in vitro. Cross-resistance to benzalkonium chloride also was detected. Resistance to povidone-iodine was not encountered. Chlorhexidine resistance was stable after drug-free transfers of Serratia and Pseudomonas but was transitory for Proteus.
Bone adapts to its environment. Osteoblasts and osteocytes are subject to mechanical load in vivo. It has been shown that osteoblasts alter cytokine expression in response to mechanical loading. However, signal transduction pathways that mediate bone cell response to mechanical stimuli have not been elucidated. In this study, we report an increase in(More)
A novel RNA fraction, ‘Cy RNA,’ that accumulates in mitochondria when hamster cells are treated with the methylation inhibitor cycloleucine, has been characterized by high resolution acrylamide gel electrophoresis and DNA-RNA hybridization. Cy RNA ran in gels as a discrete band, with an apparent chain length of 2 600. It hybridized specifically to(More)
Focusing on technical security can lead to shortfalls in the understanding of social and organisational security challenges. This paper proposes a method for analysing social, technical, and organisational security challenges, in regard to industrial control systems (ICS). This method is applied to a target organisation dependent on ICS, to validate the(More)
In assessing the security posture of Industrial Control Systems (ICS), several approaches have been proposed, including attack graphs, attack trees, Bayesian networks and security ideals. Predominantly focusing on technical vulnerabilities, challenges stemming from social and organisational factors are often reviewed in isolation, if at all. Taking a mean(More)
STUDY DESIGN Molecular study of gene expression in rabbit lumbar pseudarthrosis repairs using reverse transcriptase polymerase chain reaction. OBJECTIVE To evaluate differential gene expression of no graft, autograft, and osteogenic protein-1 treated pseudarthroses. SUMMARY OF BACKGROUND DATA Osteogenic protein-1 is a potential bone graft alternative(More)