The aim of this paper was to study the influence of microbial biofilms on the high copper levels measured in the drinking water of rural houses. Drinking water parameters and copper pipe surfaces were analysed in the copper plumbing systems of rural and urban houses. The water in rural houses had pH values of 6.2 and alkalinity values of 63mg/L as CaCO3, whereas in urban houses the pH values we...

Growth of Salmonella enterica was studied in model mixed cultures with Citrobacter freundii or Escherichia coli in buffered peptone water (BPW) and in Rappaport-Vassiliadis medium with soya (RVS) with modified concentrations of MgCl2 and malachite green, and at modified incubation temperatures. Selected S. enterica strains were inoculated in BPW (10(0) cfu/ml) together with selected strains of ...

BACKGROUND Laccase-like multicopper oxidases have been reported in several Aspergillus species but they remain uncharacterized. The biocatalytic potential of the Aspergillus niger fungal pigment multicopper oxidases McoA and McoB and ascomycete laccase McoG was investigated. RESULTS The laccase-like multicopper oxidases McoA, McoB and McoG from the commonly used cell factory Aspergillus niger...

Live cell imaging requires bright photostable dyes that can target intracellular organelles and proteins with high specificity in a no-wash protocol. Organic dyes possess the desired photochemical properties and can be covalently linked to various protein tags. The currently available fluorogenic dyes are in the green/yellow range where there is high cellular autofluorescence and the near-infra...

Malachite green (MG) is a triphenylmethane cationic dye used in aquaculture practice, although it has been banned several countries. The illegal use by fish producers, however, persists due to its effectiveness, and ready cheap supply. To prevent indiscriminate applications, strict control measures with simple analytical approaches are therefore necessary. With this purpose, novel, method apply...

This study was focused on the adsorption of malachite green as a cationic dye on magnetite nanoparticles loaded green tea waste (MNLGTW), peanut husk (MNLPH), Azolla (MNLA) and Fig leave (MNLFL) as naturally cheap sources of adsorbent. MNLGTW, MNLPH, MNLA and MNLFL were prepared with chemical precipitation method and they were characterized with Fourier transform infrared spectroscopy (FT-IR), ...