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Sterols and sterolins in Hypoxis hemerocallidea (African potato)

Authors: Nair, V D P , Kanfer, Isadore
Date: 2008
Language: English
Type: text , Article
Identifier: vital:6417 , http://hdl.handle.net/10962/d1006535
Description: Commercially available health supplements and herbal remedies containing sterols and sterolins, either from African potato (Hypoxis hemerocallidea) alone, or whether enriched with sterols and sterolins, are claimed to be efficacious in the treatment of a variety of ailments. Sterols and sterolins in African potato are purported to be the relevant constituents that are required for the therapeutic claims of such products. A patent describing the extraction of sterolins from African potato plant material has claimed that approximately 9 mg sterolins can be isolated from 100 g of an enriched aqueous African potato extract. Our analysis of African potato plant material and its sterol and sterolin content, when similarly prepared, shows that the measureable content of sterols and sterolins in African potato is far less than the amounts of these compounds that have been claimed to be necessary for therapeutic benefit. We conclude that therapeutic claims relating to sterol and sterolin content in African potato are unsubstantiated, in view of the extremely low content of such compounds that we have isolated from our plant material, and in products containing African potato, or extracts thereof.
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Date Issued: 2008

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Southern Africa perspective - In South Africa: The Bloody Campaign Against Organized Labor

Authors: COSATU
Date: 1991
Subjects: COSATU
Language: English
Type: text
Identifier: http://hdl.handle.net/10962/169033 , vital:41677
Description: A year after African National Congress leader Nelson Mandela’s release from prison, South Africa’s Black trade unions, particularly the million-member Congress of South African Trade Unions (COSATU), remain at the heart of the movement for political democracy and economic and social change. Union activists have been instrumental in revitalizing mass opposition to apartheid — launching ANC branches, organizing local consumer and utility boycotts, and leading strikes over wages, job security and workplace racism that cost the white-run economy over four million work days during 1990. But labor’s role in the struggle for political and economic democracy has increasingly made the unions the target of state-sponsored political violence. Black labor’s resistance to oppression goes back to the 1920s, when the militant Industrial and Commercial Workers Union built a national membership of over 100,000. But it was not until 1981, after a wave of illegal strikes forced the apartheid regime to lift the ban on Black unions, that labor began to emerge as a major anti-apartheid force. With Mandela’s African National Congress and other organizations still outlawed, Black workers increasingly saw their unions as a vehicle for their political aspirations.
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Date Issued: 1991

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