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Two DNA plasmids, approximately 11 and 8 kb in size, have been identified in a strain of the yeastPichia pastoris(Northern Regional Research Laboratories No. Y4290). The plasmids are resistant to RNase A and λ exonuclease, but are sensitive to digestion by DNase I, suggesting that they are linear and double-stranded DNA with 5′-protected ends. A restriction map has been constructed for the 11-kb plasmid,...
Direct filtration with and without pre-ozone, and dissolved air flotation and filtration were evaluated for clarification of high quality reservoir water in Greenville, South Carolina, USA. Goals of the study included production of low turbidity filtered water and control of algae, iron and manganese, and disinfection by-product precursors. The dissolved air flotation treatment train gave much longer...
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