water quality – TechConnect Briefs

Estimation of Algae Concentration in Water Using Spectrophotometric Measurements and First Derivative of Absorbance

AlMomani F., Örmeci B., Qatar University, QA

The occurrence of algae in conventional wastewater treatment plants or aerated lagoons can result in false indications in the final effluent parameters, such as TSS and CBOD5 . Algae plumes create surface scum, poor water [...]

Silica coated Magnetic Nanoparticles (SMNPs): Capture and Identification of Escherichia coli Cells using Surface Enhanced Raman Spectroscopy

Rastogi S.K., Jabal J., Zhang H., Haler K.J., Gibson C.M., Qiang Y., Aston D.E., Hurdlicka P.J., Branen A.L., University of Idaho, US

Silica coated Magnetic nanoparticles (SMNPs; SiO2/Fe3O4 + Fe2O3) were prepared by encapsulation of iron oxide NPs with silica dioxide using the sol-gel method and characterized through transmission and scanning electron microscopic imaging, magnetic hysteresis and [...]

Low-power / High-temperature sensors and MEMS in SOI technology

Moreno-Hagelsieb L., Bulteel O., André N., Gerard P., Raskin J-P, Flandre D., Université catholique de Louvain / SENSOI, BE

Low-power and high-temperature sensors and MEMS designs based on bulk, SOI and IC compatible materials and processes. Target markets are in general public sensors for UV, ozone, CO, liquids presence, e.g. in mobile devices. In [...]

Use of Magnetoresistive Biochips for Monitoring of Pathogenesis Microorganisms in Water through Bioprobes: Oligonucleotides and Antibodies

Martins V.C.B., Fonseca L.P., Ferreira H.A., Graham D.L., Freitas P.P., Cabral J.M.S., Instituto Superior Técnico, PT

Magnetoresistive biochips have been integrated with success in a microtechnology engineered set-up for the development of a portable analytical device, characterized by low-cost with high sensitivity and selectivity of immunodetection and biomolecular methods [1, 2]. [...]