Southern African Journal of Gerontology, volume 8, number 1, April 1999
- Authors: Ferreira, Monica (editor) , Moller, Valerie , HSRC/UCT Centre for Gerontology
- Date: 1999
- Subjects: Gerontology -- South Africa , Older people -- Care -- South Africa
- Language: English
- Type: Text
- Identifier: vital:8078 , http://hdl.handle.net/10962/d1012912
- Description: [From Editorial] Several contemporary building blocks of African gerontology are used in the papers in this number of SAJG. First, Madzingira draws on 1990s' demographic data sources to examine selected levels, patterns and trends of population ageing in Zimbabwe. She briefly outlines implications of population ageing for socio-economic development in the country, and highlights critical areas such as the future of the family as a safety net for elders, inadequate social-security measures, health care provision, trends in consumption of goods and services, and the ageing population structure in the rural areas. Although based on a descriptive modernization theory model, the paper reflects the continued usefulness of the theory in highlighting the effects of structural lag, but avoids a reliance on stereotypes. Staying in Zimbabwe, Mupedziswa takes up feminist issues and critiques the plight of older female informal-sector traders and their gender-based cumulative disadvantage. The author pertinently and sympathetically examines the women's diminished access to power across the lifespan and their dilemma as they become increasingly frail. Refreshingly, he approaches his investigation from a political economy perspective, and considers the interdependence of this gender-differentiated age cohort and the social structure. Moving to Ghana, Adeku in his paper examines socio-demographic factors in the marital status of older persons. His findings highlight the greater proportion of widows in the older population, which gender differential he explains is a function of both a high mortality rate in older men and remarriage. He also specifically examines gender-based inheritance and other wealth transfer patterns - and hence uses both social exchange theory and political economy theory concepts for explanation, as well as draws on feminist theories to analyse the situations of the older women. Staying in Ghana, Darkwa gives his views on the health-care needs and challenges of older Ghanaians who reside in rural areas. Again, the author addresses a political economy issue, and makes suggestions on how the government could bridge the urban-rural health gap and improve both preventive and curative health-care service delivery to the vast majority of the older Ghanaian population which lives in the rural areas. He also introduces an intriguing notion of the role that communication technology can play in the future provision of health care to Africa's elderly. Finally, revisiting demographic and health transitions in Africa, their implications and related issues, Adamchak reviews the World Health Organization's 1997 report on Ageing in Africa, authored by Nana Araba Apt in Ghana. Adamchak evaluates this "overview" report and its relevance, and examines some of the historical and contemporary African gerontology building blocks with which the report is constructed.
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- Date Issued: 1999
Organosilicon compounds as fluorescent chemosensors for fluoride anion recognition
- Authors: Gai, Lizhi , Mack, John , Lu, Hua , Nyokong, Tebello , Li, Zhifang , Kobayashi, Nagao , Shen, Zhen
- Language: English
- Type: Article
- Identifier: vital:7241 , http://hdl.handle.net/10962/d1020245
- Description: Recent developments in organosilicon-based chemosensors for F− recognition are reviewed. The design strategies for improving the photophysical properties of organosilicon-based chemosensors are elaborated, with an emphasis placed on their utility for biological applications. The photophysical properties and electronic structures are analyzed in depth with reference made to the results of molecular modeling calculation and possible future research directions are assessed. , Original publication is available at http://dx.doi.org/10.1016/j.ccr.2014.10.009
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