Upland policy and archaeological resources in North Wales
Abstract Implementation of post-war policies for the uplands has resulted in considerable impacts upon archaeological resources, which have gone largely unrecorded. A study of western Clwyd, North Wales has identified forestry and the improvement of upland vegetation for agriculture as primary causes of damage to archaeological sites. Both involve deep ploughing which is particularly destructive. Evidence suggests, albeit on a small number of samples, that Scheduled Ancient Monuments, despite their statutory protection against damage, are equally at risk as other sites of lesser importance.
The EEC less favoured areas directive: Implementation and impact on upland land use in the UK☆
Abstract This article contains an analysis of the implementation of the Less Favoured Areas Directive in the UK. The LFA policy of the EEC provides for the support of agriculture in designated areas, in order to sustain rural populations and to protect the countryside. In the UK, the directive has simply been absorbed into existing policy for upland areas. This policy seeks to maximize the production of sheepmeat and store cattle through agricultural intensification. Grants and subsidies have led to considerable deterioration of the upland landscape and wildlife resources of the uplands, with little discernable impact on maintaining rural populations.
l-Phenylalanine dehydrogenase from Brevibacterium sp. for production of l-phenylalanine by reductive amination of phenylpyruvate
SummaryFor production of l-phenylalanine the reductive amination of phenylpyruvate, catalyzed by phenylalanine-dehydrogenase was examined. To reach high levels and a sufficient stability of the inducible intracellular enzyme, growth conditions of Brevibacterium sp. are optimized. For continuous production of l-phenylalanine in an enzyme membrane reactor, the kinetic parameters of the partially purified enzyme are determined.In continuous production a space time yield of 37.4 g l-Phe l-1 d-1 can be reached.By means of the measured kinetic parameters and simultaneous calculation of the mass balances of all reaction components the behaviour of the reactor can be simulated. For certain conditions the multi-enzyme-system shows multiple steady-states.