A total of 44 intermittent sand filter-septic systems, in five counties of Western
Oregon, were sampled over a three-month period during the summer of 1995. The sand
filter systems varied in age from 36 months up to 167 months (3 to 13.9 years). Liquid
samples were taken from the septic...
The goal of this thesis was to develop a process of producing small monodisperse
alginate gel beads. The phenomenon of controlled jet break-up of alginate solution jet
with assisted vibration was used to form uniform sodium alginate droplets which were
subsequently crosslinked with divalent calcium ion to form gel beads....
Human activities may contribute to the eutrophication of surface waters by
providing nutrients to aquatic ecosystems. Phosphorus is frequently identified as a
nutrient that is limiting to most aquatic ecosystems under natural conditions. Sources of
phosphorus contributing to eutrophic conditions often include nonpoint sources that are
dispersed across the landscape....
