46 research outputs found
Food Use and Health Effects of Soybean and Sunflower Oils
This review provides a scientific assessment of current knowledge of health effects of soybean oil (SBO) and sunflower oil (SFO). SBO and SFO both contain high levels of polyunsaturated fatty acids (PUFA) (60.8 and 69%, respectively), with a PUFA:saturated fat ratio of 4.0 for SBO and 6.4 for SFO. SFO contains 69% C18:2n-6 and less than 0.1% C18:3n-3, while SBO contains 54% C18:2n-6 and 7.2% C18:3n-3. Thus, SFO and SBO each provide adequate amounts of C18:2n-6, but of the two, SBO provides C18:3n-3 with a C18:2n-6:C18:3n-3 ratio of 7.1. Epidemiological evidence has suggested an inverse relationship between the consumption of diets high in vegetable fat and blood pressure, although clinical findings have been inconclusive. Recent dietary guidelines suggest the desirability of decreasing consumption of total and saturated fat and cholesterol, an objective that can be achieved by substituting such oils as SFO and SBO for animal fats. Such changes have consistently resulted in decreased total and low-density-lipoprotein cholesterol, which is thought to be favorable with respect to decreasing risk of cardiovascular disease. Also, decreases in high-density-lipoprotein cholesterol have raised some concern. Use of vegetable oils such as SFO and SBO increases C18:2n-6, decreases C20:4n-6, and slightly elevated C20:5n-3 and C22:6n-3 in platelets, changes that slightly inhibit platelet generation of thromboxane and ex vivo aggregation. Whether chronic use of these oils will effectively block thrombosis at sites of vascular injury, inhibit pathologic platelet vascular interactions associated with atherosclerosis, or reduce the incidence of acute vascular occlusion in the coronary or cerebral circulation is uncertain. Linoleic acid is needed for normal immune response, and essential fatty acid (EFA) deficiency impairs B and T cell-mediated responses. SBO and SFO can provide adequate linoleic acid for maintenance of the immune response. Excess linoleic acid has supported tumor growth in animals, an effect not verified by data from diverse human studies of risk, incidence, or progression of cancers of the breast and colon. Areas yet to be investigated include the differential effects of n-6- and n-3-containing oil on tumor development in humans and whether shorter-chain n-3 PUFA of plant origin such as found in SBO will modulate these actions of linoleic acid, as has been shown for the longer-chain n-3 PUFA of marine oil
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Creative industries, inequality and social development: developments, impacts and challenges in Cape Town
Creative industries are often regarded as avenues for urban regeneration, economic development and job creation. The growth of creative industries is linked to post-Fordist economic restructuring in cities. As a result, the economic base of cities has moved away from manufacturing to knowledge-intensive and service-based industries. While countries in the Global South generally contribute marginally to the global economy, some countries are seeking to enhance their competitiveness in the global environment and gain from opportunities presented by the creative economy. Policymakers in the Global South have therefore adopted creative
industry policies, and often link these to social development outcomes. However, this presents various challenges. The literature indicates that creative industries can exacerbate existing inequalities and marginalise working class residents. Furthermore, the benefits of creative urban renewal do not necessarily reach poor communities. This paper contributes to debates regarding the role of creative industries in the urban economies of cities in the Global South. This reflects on the impacts of creative urban renewal, and the implications for social development and policy. It also considers recent development and challenges around creative industry promotion in Cape Town, with specific reference to the city-fringe neighbourhood of Woodstock.
Innovation in Tourism: A New Focus for Research and Policy Development in South Africa
Innovation is imperative for the competitiveness and growth of firms, tourism systems and the national tourism economy. As indicated in this article, services and tourism are of growing importance for the economy of South Africa, and a fair proportion of local firms engage in innovative activities. However, innovation in tourism has remained largely absent from local debates and policies. Moreover, the concept of innovation in tourism has been poorly developed in the local context and has not been translated to actual policy initiatives. This article highlights key considerations for tourism innovation in South Africa and argues that this should be a new focus area for research and policy development
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Global-local trajectories for regional competitiveness: tourism innovation in the Western Cape
The paper interrogates regional competitiveness by analysing tourism innovation and networking as a case study example from the Western Cape region, South Africa. The economic significance of services and tourism to the region, as well as the innovation performance of tourism firms, and the policy environment which supports innovation and tourism are examined. An analysis of
micro-data discloses that innovation is widespread and therefore is significant for the competitiveness of the regional tourism economy. The results of this investigation point to the critical need for regional policy to focus on strategic networking linkages to access global knowledge flows, as well as the need to develop tourism as core regional competency, and to strengthen the
capacity of local institutions to foster regional innovation, competitiveness and growth in the Western Cape economy.
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Are small, medium- and micro-sized enterprises engines of innovation?: the reality in South Africa
This paper examines the relationship between innovation activity and firm size in the South African context. Based on data from the National Innovation Survey (2002-2004) the paper looks in particular at the nature of innovation by small, medium and micro-sized enterprises (SMMEs). The main finding is that the innovation rate of SMMEs is relatively high, with small enterprises reporting the highest innovation rate. A limited dependent variable regression, however, determines a negative statistically significant relationship between the probability to innovate and firm size. SMMEs are therefore not more innovative than large enterprises in South Africa. This paper identifies innovative entrepreneurs and micro enterprises as important foci for entrepreneurship and innovation policy.
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Creative tourism in Cape Town: an innovation perspective
Creative tourism is a growing field of inquiry in tourism studies and engages creative industry, creative city and urban regeneration debates. This research identifies creative experience-based tourism as an example of novel tourism product innovation in Cape Town. Creative spectacles and creative spaces in the Cape Town context are also investigated. Key findings are that creative experience-based tourism is a small, but emerging urban tourism niche market with considerable growth potential in Cape Town; creative events are well developed currently in Cape Town but as yet poorly integrated with the wider tourism destination mix as well as creative industry initiatives, and whilst creative clusters are emerging in Cape Town, minimal development of creative urban spaces for tourism purposes is evident. Critical policy issues emerging from this analysis surround recommendations for fostering creative networks, stimulating demand for creative tourism, developing a comprehensive creative tourism product mix, planning for creative precinct development, and integrating creative tourism into the Cape Town destination image.
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Tourism innovation in the global South: evidence from the Western Cape, South Africa
A research gap exists for the conceptual strengthening, measurement and analysis of innovation at the tourismfirm and systems levels, especially in the context of the global South. This paper investigates tourisminnovation in the Western Cape region of SouthAfrica. In particular, the nature and types of innovation by tourismfirms and systemactors are interrogated. It is revealed that innovation by tourismfirms iswidespread, albeit is largely incremental in nature. The main contribution of this research is the development of an expanded evidence-based tourism innovation typology from a cross-sectoral survey of tourism firms and qualitative interviews undertaken with tourism systemactors. In addition, recommendations are provided regarding measurement of innovation in tourism.