Biodeterioration of Incralac used for the protection of bronze monuments

Outdoor bronze sculptures are highly susceptible to corrosion in many environments and organic coatings are widely used for their protection. The purpose of this study was to determine the susceptibility of the commonly used coating Incralac to biodeterioration by microorganisms. A yeast was isolated from a bronze statue treated with Incralac and its ability to degrade Incralac was determined using growth curves, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The organism grew slowly on Incralac in liquid culture, but SEM images demonstrated its ability to adhere to Incralac coated metal. Additionally, the yeast caused a rapid drop in the low frequency impedance of Incralac coated metal that was not observed under sterile conditions, indicating that the organism accelerated deterioration of the coating. The potential for microbial growth to accelerate deterioration of Incralac should be considered when developing a maintenance strategy for the protection of outdoor metal monuments.     

Extreme Literacies and Contemporary Readers

Literate behaviours are changing with new technological and commercial reworkings of popular fictions. Today's young people are acquiring new skills and strategies to deal with the enormous onslaught of secondary texts associated with many major fictions. This article discusses such developments in the context of three stories: Harry Potter, The Lord of the Rings and The Simpsons. It investigates the potential for new approaches to literacy as displayed by particular young readers.     

Provision for Children with Speech and Language Difficulties in Tanzania

Knowledge about paediatric speech and language difficulties, training for and contact with children with such problems and views on service developments were explored using a written questionnaire, completed by 84 Tanzanian health and education professionals. Additionally, two sets of interviews were carried out, one with a subset of questionnaire respondents and another with a group of 14 health/education planners and administrators. Results showed that whilst only 41 % of respondents had received training about speech and language difficulties, 68% considered themselves to be responsible for assisting children with such problems. Levels of knowledge were significantly higher in the special education group, but were not significantly related to training, exposure to speech and language therapists, or professional responsibility. However, knowledge levels were significantly related to daily contact with children with speech and language difficulties. No evidence of research or planning for children with such difficulties was discovered. Views on service provision favoured educational over health‐based provision. Qualitative information on attitudes and beliefs about speech and language difficulties did not contradict previous data on disabilities. The implications for Tanzania and other similar countries are discussed. Improvements to the questionnaire are discussed. More data are needed in order to facilitate appropriate service development.