oxidative stress
oxidative stress on World Data Ocean: a running collection of 3 stories we have gathered and hand-picked because they are worth your time. Every post here touches on oxidative stress in some way — the news, the analysis, the deep dives, and the occasional surprise find. A Global Hub for Ocean Intelligence 4 World Data Ocean is a centralized digital platform where researchers, scientists, and ocean enthusiasts converge to explore, analyze, and… New stories are added to this page as we find them, so check back if you want to keep up with what is happening around oxidative stress, or subscribe to the RSS feed to get them as soon as they are published. Browse the collection below, or head back to the homepage to see everything World Data Ocean is covering right now.
Evaluation of pharmaceutical plastic leachates and its impact on Artemia franciscana as a model organism
Pharmaceutical packaging, predominantly composed of plastics like polystyrene, polypropylene, and polyethylene terephthalate, can release chemical leachates with potential biological consequences. This study rigorously evaluated the organic and inorganic composition of these leachates and assessed their impact on *Artemia franciscana*, a model organism, revealing concentration-dependent mortality and oxidative stress. Notably, polyethylene (EPE) and polypropylene (PP) leachates induced significant increases in reactive oxygen species (ROS) and lipid peroxidation, alongside decreased antioxidant enzyme activity.
The inaudible impact: physiological stress responses to ultrasonic exposure in the solitary ascidian Ciona intestinalis
The increasing prevalence of ultrasonic technologies in coastal environments raises critical questions about their impact on marine life. A recent study investigated the physiological stress responses of the solitary ascidian, *Ciona intestinalis*, to continuous and pulsed ultrasound exposure. Findings reveal that continuous ultrasound significantly impairs antioxidant defenses, induces cell death, disrupts filter-feeding, and damages mechanosensory structures—effects potentially more impactful than peak intensity alone. This research underscores the need to consider emission patterns in the environmental assessment of ultrasonic technologies, informing eco-design strategies.
Effects of ultraviolet-B radiation on the reproduction, germling growth, and physio-biochemical characteristics of green alga Ulva pertusa (Chlorophyta)
Increased ultraviolet-B (UV-B) radiation, a consequence of ozone depletion, presents a significant global environmental challenge. This study investigates the impact of varying UV-B doses on the green alga *Ulva pertusa*, a species commonly found in shallow, high-radiation intertidal zones. We examined the effects on reproduction, germling development, and key physio-biochemical parameters. Results demonstrate a dose-dependent reduction in propagule density, germination rates, and germling growth, alongside increased oxidative stress and a compensatory, yet ultimately insufficient, antioxidant response.