microorganisms – TechConnect Briefs

Iron-sequestering molecules play a pivotal role in the mechanism of toxicity of SWNTs on fungal and bacterial cells

Chaves J.S., Chaves S.J., Zuniga P., Chaves J.S., Chaves S.J., Instituto Tecnologico de Costa Rica, CR

In this study we described that iron-sequestering molecules are responsible for the toxicity of iron containing SWNTs to microorganisms. After incubating different concentrations of functionalized SWNTs with bacteria and fungal cells, it was found that [...]

An investigation on the aggregation phenomena of Titanium dioxide nanoparticles in natural waters: role of ionic strength, organic matter and natural colloidal particles

Romanello M., Luppi V.A., Bertini L., Fidalgo de Cortalezzi M., Instituto Tecnológico de Buenos Aires, AR

The aggregation behavior of TiO2 nanoparticles under conditions normally encountered in natural waters was investigated. Aggregation kinetics and size distribution was determined by DLS using a Nanosizer ZS, Malvern, UK. SEM images were also collected. [...]

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]. [...]