30 research outputs found
'Kids sold, desperate moms need cash': Media representations of Zimbabwean women migrants
The article draws on 575 randomly selected articles from the South African Media database
to explore the representation of Zimbabwean women migrants. Using critical discourse analysis
(CDA), the article shows that some of the dominant construction types depict a picture of caricatured,
stereotypical and stigmatised Zimbabwean migrant women without voice and individuality. In turn,
the diversity of their actualities is not captured in the process of constructing the twin images of
Zimbabwean women as victims and as purveyors of decadent and other negative social ills in
society. We conclude that Zimbabwean women migrants appear in the SA media primarily in three
negative images: suppliers of sexual services, as un-motherly, and as victims. We also conclude
that there is need for media to capture the voices of migrant women recounting their everyday lived
experiences in different political and socio-economic contexts in order to account for the migrant
women's voices of resilience, defiance and victimhood and of agency, against the normalising and
marginalising influences of political institutions and national border controls. This would also help
capture the transformative nature of migration to the women, the 'home' in Zimbabwe and the 'home'
in South Africa.IS
Nitrogen Fixation and Hydrogen Metabolism in Relation to the Dissolved Oxygen Tension in Chemostat Cultures of the Wild Type and a Hydrogenase-Negative Mutant of Azorhizobium caulinodans
Both the wild type and an isogenic hydrogenase-negative mutant of Azorhizobium caulinodans growing ex planta on N(2) as the N source were studied in succinate-limited steady-state chemostat cultures under 0.2 to 3.0% dissolved O(2) tension. Production or consumption of O(2), H(2), and CO(2) was measured with an on-line-connected mass spectrometer. In the range of 0.2 to 3.0%, growth of both the wild type and the mutant was equally dependent on the dissolved O(2) tension: the growth yield decreased, and the specific O(2) consumption and CO(2) production increased. A similar dependency on the dissolved O(2) tension was found for the mutant with 2.5% H(2) in the influent gas. The H(2)/N(2) ratio (moles of H(2) evolved per mole of N(2) consumed via nitrogenase) of the mutant, growing with or without 2.5% H(2), increased with increasing dissolved O(2) tensions. This increase in the H(2)/N(2) ratio was small but significant. The dependencies of the ATP/N(2) ratio (moles of ATP consumed per mole of N(2) fixed) and the ATP/2e(-) ratio [moles of ATP consumed per mole of electron pairs transferred from NAD(P)H to nitrogenase] on the dissolved O(2) tension were estimated. These dependencies were interpreted in terms of the physiological concepts of respiratory protection and autoprotection