Filtern
Dokumenttyp
- Wissenschaftlicher Artikel (23) (entfernen)
Schlagworte
- Crayfish plague (2)
- Freshwater crayfish (2)
- Anabaena sp. (1)
- Antagonistic interactions (1)
- Aphanomyces astaci (1)
- Astacus astacus (1)
- Barbatula barbatula (1)
- Belonging (1)
- Bodenchemie (1)
- CAT (1)
- Calothrix desertica (1)
- Carnivora (1)
- Connectedness (1)
- Cottus gobio (1)
- EPS (1)
- FCS (1)
- Faxonius limosus (1)
- Grayscale (1)
- Problematic smartphone use (1)
- Procambarus virginalis (1)
- RNA sequencing (1)
- STEM (1)
- Smartphone addiction (1)
- Suffering (1)
- Types of smartphone use (1)
- Ubuntu (1)
- X-ray computer tomography (XRT) (1)
- acid leaching (1)
- age cohorts (1)
- aggregation (1)
- anomalous colouration (1)
- bauxite (1)
- biofilm (1)
- biorecovery (1)
- biosynthesis (1)
- color morphs (1)
- control beliefs (1)
- crystal structure (1)
- cyanobacteria (1)
- density separation (1)
- digestion (1)
- digital image analysis (1)
- digital image processing (1)
- emic-etic (1)
- emotional regulation (1)
- excess deaths (1)
- ferrocene (1)
- gender gap (1)
- gender stereotypes (1)
- genetic diversity (1)
- growth monitoring (1)
- inbreeding (1)
- invasive crayfish (1)
- iron removal (1)
- nanoparticle size distribution (1)
- nanoparticles (1)
- nanoplastics (1)
- nature connectedness (1)
- personnel psychology (1)
- plastic debris (1)
- prognosis model (1)
- prosocialness (1)
- pyrrole (1)
- pyrrolone (1)
- refractory grade (1)
- sample pretreatment (1)
- self-love (1)
- shape classification (1)
- skin conductance (1)
- soil organic matter (1)
- spatial abilities (1)
- transcultural (1)
- well-being (1)
Institut
- Institut für Psychologie (6)
- Institut für Integrierte Naturwissenschaften, Abt. Chemie (3)
- Fachbereich 7 (2)
- Institut für Integrierte Naturwissenschaften, Abt. Physik (2)
- Arbeitsbereich Sozial- und Wirtschaftspsychologie (1)
- Fachbereich 4 (1)
- Institut für Integrierte Naturwissenschaften (1)
- Institut für Integrierte Naturwissenschaften, Abt. Biologie (1)
- Institut für Umweltwissenschaften (1)
- Mathematisches Institut (1)
Herein, the particle size distributions (PSDs) and shape analysis of in vivo bioproduced particles from aqueous Au3+ and Eu3+ solutions by the cyanobacterium Anabaena sp. are examined in detail at the nanoscale. Generally, biosynthesis is affected by numerous parameters. Therefore, it is challenging to find the key set points for generating tailored nanoparticles (NPs). PSDs and shape analysis of the Au and Eu-NPs were performed with ImageJ using high-resolution transmission electron microscopy (HR-TEM) images. As the HR-TEM image analysis reflects only a fraction of the detected NPs within the cells, additional PSDs of the complete cell were performed to determine the NP count and to evaluate the different accuracies. Furthermore, local PSDs were carried out at five randomly selected locations within a single cell to identify local hotspots or agglomerations. The PSDs show that particle size depends mainly on contact time, while the particle shape is hardly affected. The particles formed are distributed quite evenly within the cells. HR-PSDs for Au-NPs show an average equivalent circular diameter (ECD) of 8.4 nm (24 h) and 7.2 nm (51 h). In contrast, Eu-NPs preferably exhibit an average ECD of 10.6 nm (10 h) and 12.3 nm (244 h). Au-NPs are classified predominantly as “very round” with an average reciprocal aspect ratio (RAR) of ~0.9 and a Feret major axis ratio (FMR) of ~1.17. Eu-NPs mainly belong to the “rounded” class with a smaller RAR of ~0.6 and a FMR of ~1.3. These results show that an increase in contact time is not accompanied by an average particle growth for Au-NPs, but by a doubling of the particle number. Anabaena sp. is capable of biosorbing and bioreducing dissolved Au3+ and Eu3+ ions from aqueous solutions, generating nano-sized Au and Eu particles, respectively. Therefore, it is a low-cost, non-toxic and effective candidate for a rapid recovery of these sought-after metals via the bioproduction of NPs with defined sizes and shapes, providing a high potential for scale-up.