Naslov
Sulphur-containing compounds as a response in sea urchins exposed to alkylated silicon nanocrystals and SiO2-coated iron oxide nanoparticles

Autori
Šiller, Lidija ; Piticharoenphun, Sunthon ; Lemloh, Marie-Louise ; Horrocks, Benjamin R. ; Kaulich, Burkhard ; Gianoncelli, Alessandra ; Hunt, Michael R. C. ; Brümmer, Franz ; Medaković, Davorin

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Biomineralization: from fundamentals to biomaterials & environmental issues

Urednik/ci
Marin, Frédéric ; Brümmer, Franz ; Checa, Antonio ; Furtos, Gabriel ; Lesci, Isidoro Giorgio ; Šiller, Lidija

Izdavač
Trans Tech Publications

Grad
Pfäffikon

Godina
2016

Raspon stranica
312-327

ISBN
978-3-03835-591-5

Ključne riječi
sea urchins ; toxicity ; silicon nanocrystals ; iron oxide nanoparticles ; fourier transform infrared spectroscopy

Sažetak
We report the effects of exposure to alkylated silicon nanocrystals (‘alkyl-SiNCs’ at concentration ~ 7.2 mg/L) and -Fe2O3 nanoparticles coated with ultra-thin silica (‘SiO2-coated IONPs’ at concentration ~ 150 mg/L) on sea urchins Paracentrotus lividus and Arbacia lixula, respectively, studied with X-ray fluorescence (XRF) and Fourier transform infrared (FTIR) spectroscopies using excitation from a synchrotron light source. A remarkably low mortality and low incidence of skeletal deformation is observed for xposure to both types of nanoparticles studied, despite the high concentrations employed in this work. XRF mapping demonstrates that both types of nanoparticle are found to agglomerate in the body of the sea urchins. FTIR spectra indicates that alkyl-SiNCs remain intact after ingestion and corresponding XRF maps show increased oxygen throughout the organisms, possibly related to oxidation products arising from reactive oxygen species generated in the presence of the nanoparticles. Exposure to SiO2-coated IONPs is found to produce sulphur-containing species, which may be the result of a biological response in order to reduce the toxicity of the nanomaterial.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija, Biologija

POVEZANOST RADA