The importance of good water quality to environmental and human health cannot be over-emphasised physicochemical properties are essential in assessing the around world. This study therefore, assessed sediments Ikpoba Ogba Rivers, Edo State, Nigeria, following standard procedures. results obtained from showed that most analysed samples were within safe limits recommended by WHO. values for both ...

3 Estimating the means and standard deviations of environmental data remains a great chal4 lenge because a substantial percentage of observations lies below or above detection limits. 5 The inadequacy of several common, ad hoc estimation procedures is clear; this study instead 6 proposes a robust moment estimation procedure for environmental data with a one-sided 7 detection limit. The procedur...

The lack of comparable metabolic state assays severely limits understanding the metabolic changes caused by genetic or environmental perturbations. The present study reports the application of a novel derivatization method for metabolome analysis of yeast, coupled to data-mining software that achieve comparable throughput, effort and cost compared with DNA arrays. Our sample workup method enabl...

CODELCO’s Chuquicamata Copper Smelter, located in Chile, must meet an environmental standard established in 2002 that limits the sulfur emissions from the copper-production process. This regulation placed new restrictions on the production process, and consequently the heuristic criteria based on years of operator experience no longer resulted in high production levels. We developed a model to ...