The CE-QUAL-W2 model has been selected as a tool for use in water quality management studies of the Occoquan Reservoir. In order for the model to achieve its best possible predictive capability, additional quantitative information on denitrification rates in the reservoir was required. A microcosm operating protocol was developed to obtain such information and also to enhance the understanding ...

Effects of acute gamma-irradiation were investigated in the aquatic microcosm consisting of green algae (Chlorella sp. and Scenedesmus sp.) and a blue-green alga (Tolypothrix sp.) as producers; an oligochaete (Aeolosoma hemprichi), rotifers (Lecane sp. and Philodina sp.) and a ciliate protozoan (Cyclidium glaucoma) as consumers; and more than four species of bacteria as decomposers. At 100 Gy, ...

The in situ degradation of chlorinated ethenes was assessed in an anaerobic aquifer using stable isotope fractionation approaches, microcosm studies and taxon specific detection of specific dehalogenating groups of bacteria. The aquifer in the Bitterfeld/Wolfen region in Germany contained all chlorinated ethenes, benzene and toluene as contaminants. The concentrations and isotope composition of...

Oil spill microcosms experiments were carried out to evaluate the effect of bioemulsificant exopolysaccharide (EPS₂₀₀₃) on quick stimulation of hydrocarbonoclastic bacteria. Early hours of oil spill, were stimulated using an experimental seawater microcosm, supplemented with crude oil and EPS₂₀₀₃ (SW+OIL+EPS₂₀₀₃); this system was monitored for 2 days and compared to control microcosm (only oil-...

One way to help a lay person understand the mess we’re in is to start by handing him or her this issue of Family Practice Management and pointing to “CPT Update for 2011: Immunizations, Observations and More,” on page 5. The article, by Cindy Hughes, CPC, is not an indictment of the system; rather, it’s just a concise and cogent explanation of some changes in CPT for the coming year. But imagin...

Hawai'i today is a microcosm of the many problems suffered by the United States generally. Society is plagued with inequality and injustice, an over-emphasis on economic priorities, an imbalance between humans and nature, an increasingly unrepresentative democracy, a lack of future consciousness, and an unstable economy. The values which predominate in Hawai'i are borrowed from those of the gre...