Oxygen transport in biofilm electrodes for screening of toxic chemicals

A biosensor electrode system with unique configuration and a thin layer of immobilized yeast cells, set on the surface of an amperometric oxygen membrane electrode, was developed for rapid screening of toxic chemicals in a variety of pollution and process control applications. Measurement is based on the instantaneous detection of changes in oxygen respiratory activity of biofilm of yeast cells upon exposure to toxic chemicals. The design of this electrode system, referred to as biofilm electrodes, was based on a mathematical model of oxygen transport in the biofilm and the electrochemical current response. The biofilm, which consists of three sublayers—boundary layer, filter pad, and yeast cell layer—was modeled as a one composite diffusion layer, or three separate layers in series. While the three layer model is more theoretically complete, the one layer model was more reliable and simpler to use.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/37412/1/690360105_ftp.pd

Rapid toxicity testing based on mitochondrial respiratory activity

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47992/1/128_2005_Article_BF01701787.pd

Semantic Smart World Framework

This paper presents a general Semantic Smart World framework (SSWF), to cover the Migratory birds’ paths. This framework combines semantic and big data technologies to support meaning for big data. In order to build the proposed smart world framework, technologies such as cloud computing, semantic technology, big data, data visualization, and the Internet of Things are hybrid. We demonstrate the proposed framework through a case study of automatic prediction of air quality index and different weather phenomena in the different locations in the world. We discover the association between air pollution and increasing weather conditions. The experimental results indicate that the framework performance is suitable for heterogeneous big data

A transient current monitoring and electrode characterization system for a pulsed oxygen electrode

Non-steady state voltammetry has been applied to membrane electrodes to provide improved sensitivity as well as independence of stirring. This paper describes a new instrumentation system based on complementary metal oxide--silicon technology for the characterization of a pulsed oxygen electrode. The system provides the necessary timing, analog-to-digital conversion, and digital display of the transient current.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/23255/1/0000188.pd