The transfer and persistence of trace particulates: experimental studies using clothing fabrics.

A series of experiments were conducted using various types of pollen grain, powder and metal particulates to determine their persistence on a range of different types of materials. The decay curves generated in the repeated experiments all broadly conform to those obtained and already presented in the literature for fibres and glass particulates. The experiments presented in this paper were conducted for up to 647 hours for individual runs and it was found that a general rule existed that it was the material type rather than the particulate type that was the major controlling factor in the persistence of particles. For the pollen grain experiments the overall theory is sustained; there is a significant loss initially followed by a slower decay although this is not precise given the varied nature of palynomorph types. The manner by which the particulates were introduced onto the material had an initial immediate effect, however, the persistence of these particulates over longer periods of time was generally unaffected.     

Local Government Support for Women in the Informal Economy in Durban, South Africa

This paper examines the response of the city government of Durban to the growth of the informal economy. It argues that, unlike the national government of South Africa, Durban's government has been creative in designing policies that favor informal economy workers, particularly women. These progressive policies are the result of an innovative local government and, to some extent, an emerging self-employed women worker's union that has been able to exert influence on informal economy policies.