Anew aspect of this study is the biocatalysis ability of Anabaena laxafresh-water strain-which to date has not been studied with respect to the formation of gold nanoparticles. The results of our study have shown that A. laxa is able to form gold nanoparticles (AuNPs) at good yields within 24 h of incubation at all three tested concentrations (0.1, 0.5 and 1 mM) of hydrogen tetrachloroaurate (III). After 24 h, nanoparticles were mostly localized in the growth medium, which significantly facilitates their isolation. However, the elongation of this process is accompanied by their concentration in the exopolysaccharide (EPS) layer of the cyanobacterial cells. There is a correlation between the initial concentration of the Au 3? cations and the formation of AuNPs of various shapes and a size. The comparison of activities of living and deactivated cells indicated that AuNPs were formed more efficiently when metabolically active cyanobacteria were used.
We present the results of our work on design and fabrication of Low Temperature Co-fired Ceramics (LTCC) Electrolyte as a Cathode Discharge (ELCAD) chip. It consists of plasma chamber filled with working gas (for instance helium). The fluidic channel with sample is placed below the chamber. Discharge ignites between anode and electrolyte cathode through aperture between microfluidic channel and plasma chamber. To avoid filling the chamber with fluid, channel and waste outlet should have proper geometry. We have checked our design and fabricated prototypes in DuPont system. External electrodes have been screen-printed using solderable PdAg paste. Inner electrodes, responsible for plasma creation, were made of platinum. To avoid sagging of structures we have used Sacrificial Volume Materials (SVM) and conducted multistep lamination with modified parameters. Finally, we tested if our device works properly. Firstly, we created discharge using high voltage alternating current source in air and observed discharge. Then, we ran measurements in ECLAD configuration. It was possible to create and sustain discharge with flowing liquid and gas. Also discharge spectra were recorded and analyzed. Zinc and cadmium were detected with limits of 0.14 mg/dm3 and 0.20 mg/dm3, respectively.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.