British medical bulletin
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British medical bulletin · Jan 2000
ReviewUnderstanding life-style and food use: contributions from the social sciences.
The contribution of social sciences to the study of life-style and food use in Britain is illustrated by drawing on recent evidence of purchasing patterns, reports of the organisation of meals, snacks, eating out and images of the origins of food. Work discussed underlines a considerable degree of empirical complexity, demonstrates that the supply side as well as demand should be taken into account, and illustrates the manner in which even supposedly highly voluntaristic spheres of consumption activity may none the less be circumscribed. The article is prefaced by briefly contrasting the approach to 'life-style' adopted by market researchers, public health professionals and social theorists. It concludes with the proposal that in order to understand the complexity surrounding human food use, we may be advised to consider ensuring that the descriptive and conceptual tools being used can capture that complexity.
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British medical bulletin · Jan 2000
ReviewGenetically modified crops: methodology, benefits, regulation and public concerns.
The genetic modification of crop plants from the methodology involved in their production through to the current debate on their use in agriculture are reviewed. Techniques for plant transformation by Agrobacterium tumefaciens and particle bombardment, and for the selection of transgenic plants using marker genes are described. ⋯ Some of the major concerns of the general public regarding GM crops and food: segregation of GM and non-GM crops and cross-pollination between GM crops and wild species, the use of antibiotic resistance marker genes, the prevention of new allergens being introduced in to the food chain and the relative safety of GM and non-GM foods are considered. Finally, the current debate on the use of GM crops in agriculture and the need for the government, scientists and industry to persevere with the technology in the face of widespread hostility is studied.
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In 1900, the population was beset with poverty, and infectious and deficiency diseases were common. The first half of the century was blighted by world wars, economic depression and post-war austerity. ⋯ The impact on food processing was manifold: nascent technologies such as freezing and chilling were increasingly exploited, and the consumer became the major focus of a food industry that became more sophisticated, embracing automation, computerisation and new developments in, for example, drying, heat processing, controlled and modified atmosphere packaging, ingredients and quality assurance. By 1999, this had led to an industry which provided foods that were not only safe, nutritious and palatable, but which were also increasingly convenient and healthy.
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Acute stroke treatment using aspirin and/or heparin was studied in the International Stroke Trial (IST) and Chinese Acute Stroke Trial (CAST) which randomised over 40,000 patients altogether. Combining the results demonstrated that aspirin (150-300 mg) given within 48 h of the onset of stroke produced a small but significant improvement in outcome (death or dependency) 4 weeks to 6 months after stroke of about 1 patient per 100 treated. There was a significant reduction in recurrent ischaemic stroke of similar degree, which was not associated with significant increase in cerebral haemorrhage. ⋯ Low molecular weight heparins and heparinoids have not proved any more beneficial. Therefore, heparin does not appear to be a useful routine therapy in acute stroke. The use of heparin should, therefore, be limited to patients at high risk of deep vein thrombosis or early recurrence.