Tag Archives: chemistry

Wearable Technology for Bio-Chemical Analysis of Body Fluids During Exercise

Abstract This paper details the development of a textile based fluid handling system with integrated wireless biochemical sensors. Such research represents a new advancement in the area of wearable technologies. The system contains pH, sodium and conductivity sensors. It has been demonstrated during on-body trials that the pH sensor has close agreement with measurements obtained using [...]

Direct optical sensors: principles and selected applications

Abstract In the field of bio and chemosensors a large number of detection principles has been published within the last decade. These detection principles are based either on the observation of fluorescence-labelled systems or on direct optical detection in the heterogeneous phase…Here, an overview of methods of microrefractometric and microreflectometric principles is given and benefits [...]

Smart electrochemical biosensors: From advanced materials to ultrasensitive devices

Abstract Recent reports…showed unprecedented sensitivities for biomolecular recognition using enhanced electronic amplification provided by new classes of electrode materials (e.g. carbon nanotubes, metal nanoparticles, and quantum dots). Biosensor technology is one area where recent advances in nanomaterials are pushing the technological limits of electrochemical sensitivities, thus allowing for the development of new sensor chemistries and [...]

Prospects for combining chemical and biological methods for integrated environmental assessment

Abstract …Besides deploying a chemicals-driven strategy for the ecological risk assessment of the pollutants, it is necessary to apply and to explore biological strategies. Consequently, bioassays, biosensors and effect-directed analysis (EDA) to identify pollutants responsible of particular effects have become increasingly important. We give a broad overview of how to assess biological monitoring of ecosystems [...]

Biomonitoring of Industrial Pollutants: Health and Policy Implications of the Chemical Body Burden

Abstract General discussion of the consequences of industrial production of synthetic chemicals on the human body. Coinage of the term “body burden” on the individual and collective levels. Implications for health policy and education for citizens. Comments General discussion of the consequences of industrial use of chemicals on the human body. Historical data discussed and [...]

Bioluminescent Escherichia coli Strains for the Quantitative Detection of Phosphate and Ammonia in Coastal and Suburban Watersheds

Abstract …Analytic chemistry kits are used to measure phosphate and ammonia levels in water samples with algal blooms, but their sensitivity is limited due to specificity for inorganic forms of these moieties. An Escherichia coli bioluminescent reporter system measured the bioavailability of inorganic nutrients through fusion of E. coli promoters ( phoA or glnAp2) to [...]

Recent advances in wide bandgap semiconductor biological and gas sensors

Abstract There has been significant recent interest in the use of surface-functionalized thin film and nanowire wide bandgap semiconductors, principally GaN, InN, ZnO and SiC, for sensing of gases, heavy metals, UV photons and biological molecules. For the detection of gases such as hydrogen, the semiconductors are typically coated with a catalyst metal such as [...]

Sensor technology and its application in environmental analysis

Abstract Environmental analysis is one of the fundamental applications of chemical sensors. In this review we describe different sensor systems for the gas and liquid phases that have been tested either with real-life samples or in the field during the last five years. Most field sensors rely either on electrochemical or optical transducers. In the [...]