Siderophores are low-molecular-weight metal chelators that function in microbial iron uptake. As iron limits primary productivity in many environments, siderophores are of great ecological importance. Additionally, their metal binding properties have attracted interest for uses in medicine and bioremediation. Here, we review the current state of knowledge concerning the siderophores produced by cyanobacteria. We give an overview of all cyanobacterial species with known siderophore production, finding siderophores produced in all but the most basal clades, and in a wide variety of environments. We explore what is known about the structure, biosynthesis, and cycling of the cyanobacterial siderophores that have been characterized: Synechobactin, schizokinen and anachelin. We also highlight alternative siderophore functionality and technological potential, finding allelopathic effects on competing phytoplankton and likely roles in limiting heavy-metal toxicity. Methodological improvements in siderophore characterization and detection are briefly described. Since most known cyanobacterial siderophores have not been structurally characterized, the application of mass spectrometry techniques will likely reveal a breadth of variation within these important molecules.
A photosynthesis-driven biophotovoltaic system with an Al-anode powered a microprocessor widely used in IoT applications stably for over six months.
The development of antifouling coating for sensor is desirable because the biofilm can shorten sensor’s life and cause inaccurate reading. In this study, a facile one-pot reaction was used to synthesized ZnO–graphene oxide (GO) (ZnO–GO) nanocomposites. Different amount of ZnO–GO was incorporated in the polydimethylsiloxane (PDMS) matrix respectively though a simple solution mixing method, in order to create PDMS/ZnO–GO nanocomposite (PZGO). The coating was obtained directly by spin coating of PZGO/tetrahydrofuran suspension. The hydrophobicity, surface roughness (Ra), surface free-energy (SFE) and nanoscale structure were investigated as antifouling factors. Antifouling tests were performed using two marine microorganisms, the cyanobacterium Synechococcus sp. Strain PCC 7002 and the diatom Phaeodactylum tricornutum. PZGO0.2 (mass ratio of ZnO–GO to PDMS: 0.2 wt%) displayed excellent antifouling property with 8.5% of Synechococcus sp. Strain PCC 7002 biofilm coverage, while PZGO0.1 (mass ratio of ZnO–GO to PDMS: 0.1 wt%) showed 2.4% P. tricornutum biofilm coverage. The antifouling property of the synthesized PZGO nanocomposite can be attributed to its high Ra and hydrophobicity which was caused by the good dispersion of ZnO–GO in PDMS matrix. This study suggests a potential of PZGO nanocomposite for sensor’s antifouling coating, which could contribute to improve sensor’s durability relating to biofouling in future. Graphic Abstract
Prinsipper for rettferdig global tilgang til medisiner og medisinsk behandling som resultat av kommersialisering av forskningsresultater fra medisin og helse Bakgrunn Universitetet skal etter universitets-og høyskoleloven bidra til at forskningsresultater med kommersielt potensiale utvikles og brukes til å skape verdier til det beste for samfunnet. Forskningsresultater frembringes av den enkelte forsker. Den enkelte har lovfestet rett til å offentliggjøre sine resultater og sørge for at slik offentliggjøring skjer.I juni 2008 vedtok universitetsstyret IPR-politikk for UiB (sak 68/09) og i sak (74/10) ble reglement for håndtering av ansattes rettigheter til forsknings-og arbeidsresultater vedtatt. Universitetets ansatte skal formidle forskningsresultater og motiveres til fortløpende å vurdere om resultatene kan få kommersiell utnyttelse. Bergen Teknologioverføring (BTO) AS bidrar til å kommersialisere forskningsresultatene på vegne av universitetet.
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