Time averaged narrow-band noise near 27 Hz produced by vocalizations of many distant Antarctic blue whales intensifies seasonally from early February to late October in the ocean off Australia's South West. Spectral characteristics of long term patterns in this noise band were analyzed using ambient noise data collected at the Comprehensive Nuclear-Test-Ban Treaty hydroacoustic station off Cape...

The effective apparatus deadspace of the Magill, Potter and Cape Town gas circuits has been investigated using a model system simulating 3and 8-year-old children. (1) The Cape Town system is more suitable for smaller children. (2) The Potter system is more suitable for larger children. (3) A generous fresh gas flow will decrease the deadspace of the Potter and the Cape Town systems. A flow of d...

591 July 2012, Vol. 102, No. 7 SAMJ Progressive disempowerment and provincial healthcare under-budgeting in the Eastern Cape almost forced the resignation of its corruption-buster chief, Dr Siva Pillay and his most trusted administrators last month. The political moves were directly responsible for thousands of healthcare workers going without pay or being underpaid, for five months. National h...

This was an in vitro study that aimed to evaluate the antimicrobial effect of propolis extract caffeic acid phenethyl ester (CAPE) on four different oral microorganisms. Seven concentrations CAPE (0.2, 0.5, 1, 1.5, 2, 3, and 4 mg/mL) for use against Staphylococcus aureus, Streptococcus mutans, oralis, salivarius were determined using minimum inhibition concentration (MIC), bactericidal (MBC), b...

INTRODUCTION Racially segregated schooling, a legacy of Apartheid policies, continues to hamper education in South Africa. Students entering university from suboptimal circumstances are at significant risk of demonstrating poor academic performance and dropping out of their programmes. Attempts to address the educational needs of these students have included the introduction of extended medical...