Publications by authors named "G Vamvounis"

Biodegradation of microplastics facilitated by natural marine biofouling is a promising approach for ocean bioremediation. However, implementation requires a comprehensive understanding of how interactions between the marine microbiome and dominant microplastic debris types (e.g.

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Article Synopsis
  • Plastic waste, particularly microplastics like polystyrene (PS), can contaminate marine environments and release harmful chemicals like bisphenol A (BPA).
  • Exposure experiments over 14 days tested the effects of virgin PS, BPA-bound PS, and leached BPA-PS on two coral species, Pocillopora damicornis and Dipsastraea pallida.
  • Results showed that while virgin PS had minimal effects, leached BPA negatively impacted the photochemical yield and chlorophyll levels in P. damicornis, but did not affect D. pallida, indicating that chemical leaching from microplastics causes distinct and species-specific harm.
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Mosquito-borne viruses are a major worldwide health problem associated with high morbidity and mortality rates and significant impacts on national healthcare budgets. The development of antiviral drugs for both the treatment and prophylaxis of these diseases is thus of considerable importance. To address the need for therapeutics with antiviral activity, a library of heparan sulfate mimetic polymers was screened against dengue virus (DENV), Yellow fever virus (YFV), Zika virus (ZIKV), and Ross River virus (RRV).

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Microplastics in aquatic environments is a growing concern, particularly due to the leaching of chemical additives such as plasticisers. To develop comprehensive environmental risk assessments (ERAs) of high-concern polymers and plasticisers, an understanding of their leachability is required. This work investigated diethylhexyl phthalate (DEHP) and bisphenol A (BPA) leaching from polyvinyl chloride (PVC) microplastics (average diameter = 191 μm) under simulated marine conditions.

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Phosphorescent organic light emitting diodes (OLEDs) suffer from efficiency roll off, where device efficiency rapidly decays at higher luminance. One strategy to minimize this loss of efficiency at higher luminance is the use of non-uniform or graded guest:host blend ratios within the emissive layer. This work applies a multi-scale modeling framework to elucidate the mechanisms by which a non-uniform blend ratio can change the performance of an OLED.

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