Ad ddr dres ess s f fo for r Co Corr res espo p d nd nde ence ce: :

BACKGROUND AND OBJECTIVES Gastro-oesophageal reflux disease (GORD) is a common gastrointestinal disorder with a genetic component. Our aim was to identify genetic factors associated with GORD. PATIENTS AND METHODS Four separate patient cohorts were analysed using a step-wise approach. (1) Whole genome linkage analysis was performed in 36 families. (2) Candidate genes were tested for GORD asso...

Theorell (1942) has reported sedimentation and diffusion measurements on peroxidase: our value for S20 (corr.) is about 10% lower than his (3-85 x 10-13) (cf. Cecil & Ogston, 1948), while our value for D20 (corr.) agrees fairly well with his value of 6 84 x 1o-7. Our value for the molecular weight is lower than Theorell's (44,100), but is in agreement with that calculated by Keilin & Hartree (1...

The present paper evaluates the technical and economical feasibility of converting wet chemical scrubbers to biotrickling filters for H2S control at the Orange County Sanitation District (OCSD), California. Results of 8 months of continuous operation of a biotrickling filter treating 16,000 m3 h–1 of foul air are analyzed. The reactor was operated at a gas contact time of 1.6 to 2.2 seconds rea...

Wastes generated from the production of cattle and swine in confined facilities create the potential for surface and groundwater pollution, emission of greenhouse gases, transmission of pathogens to food and water sources, and odor. It is our hypothesis that something which inhibits microbial fermentation in livestock wastes will be beneficial to solving some of the environmental problems. Our ...

Structural and microbial heterogeneity occurs in almost any type of biofilm system. General approaches for the design of biofilm systems consider biofilms as homogeneous and of constant thickness. In order to improve the design of biofilms systems, models need to incorporate structural heterogeneity and the effect of inert microbial mass. We have improved a 2D biofilm model based on cellular au...

Ad Ad Add dr dres ess s f fo for r C Co Corr rres espo po d nd nden ence ce: :

A Ad Add dr dress for r Co Co Corr rr rres espo po pond nd nden en ence ce

The performance of an upflow anaerobic sludge blanket (UASB) reactor and a hybrid UASB-filter reactor was investigated and compared for the treatment of domestic wastewater at different operational temperatures (28, 20, 14 and 10°C) and loading rates. For each temperature studied a constant CODt removal was observed as long as the upflow velocity was lower than 0.35 m/h. At these upflow velocit...

The ARIDFLO project takes a multi-disciplinary approach to the collection and analysis of data required to formulate appropriate environmental flow requirements for rivers in the Lake Eyre Basin. The key drivers of the ecological processes underpinning the health of these rivers are identified by modelling wholeof-ecosystem biological responses to hydrological events over a range of spatial and...