Effects of titanium oxide nanoparticles on growth, biochemical composition, and photosystem mechanism of marine microalgae COR-A3.

The widespread utilization of titanium oxide nanoparticles (TiONPs) in various industrial applications has raised concerns about their potential ecological risks in marine environment. Assessing the toxicity of TiONPs on primary producers is essential to understand their impact on marine ecosystem. This study investigates the acute toxicity effect of TiONPs on COR-A3 cells, focusing on structural and physiological changes that can compromise algal viability and ecological function.

Synergistic effects of plastic debris and elevated nitrate concentrations on the proliferation of Ulva lactuca micro-propagules.

Ulva lactuca is a versatile intertidal and blooming green macroalga with a global distribution, undergoing a lifecycle that consists of critical phases. The effects of surface physical properties and elevated nitrate concentrations on the growth of Ulva spores were evaluated using ATR-FTIR analysis, water contact angle measurements and fluorescence microscopy. The weathering process conducted with seawater led to the emergence of new functional groups such as CO, CH (rock), and CH, alongside a reduction in existing groups on the polymers, as evidenced by ATR-FTIR.

Adaptive mechanism of the marine bacterium Pseudomonas sihuiensis-BFB-6S towards pCO variation: Insights into synthesis of extracellular polymeric substances and physiochemical modulation.

Marine bacteria can adapt to various extreme environments by the production of extracellular polymeric substances (EPS). Throughout this investigation, impact of variable pCO levels on the metabolic activity and physiochemical modulation in EPS matrix of marine bacterium Pseudomonas sihuiensis - BFB-6S was evaluated using a fluorescence microscope, excitation-emission matrix (EEM), 2D-Fourier transform infrared correlation spectroscopy (2D-ATR-FTIR-COS), FT-NMR and TGA-DSC. From the results at higher pCO levels, there was a substantial reduction in EPS production by 58-62.