Publications by authors named "E Oster"

Objective: To examine prospectively the relationship between teething and infant sleep using objective sleep measurements.

Study Design: Over a 4-week period, 849 infants aged 3-18 months (mean = 8.4 ± 1.

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Bioaccumulation of trace element contaminants with endocrine disruptive (ED) potential has been noted in European brown bears, though evidence of their effects is lacking. Generalized linear models were employed to assess circulating levels of reproductive, stress, and thyroid hormones in relation to arsenic (As), cadmium (Cd), mercury (Hg), lead (Pb) and thallium (Tl) in 53 free-ranging brown bears (Ursus arctos) from two European populations (Carpathian and Dinara-Pindos). Other potential drivers of hormone variation, such as essential elements, ecological factors, physiological variables, and capture methods, were included as predictors.

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Induction of oxidative stress and the associated lipid peroxidation is a prevalent mechanism through which certain metal(loid)s exert nephrotoxic effects in mammals. Research on the toxic impacts of metal(loid)s in free-ranging large mammals at high trophic positions is exceedingly rare, yet crucial for understanding environmental exposure scenarios relevant to both human and animal risk assessment. Renal cortex tissues (N = 457) of free-ranging brown bears (Ursus arctos) from the Dinara-Pindos population sampled in Croatia were analysed herein for toxic metal(loid)s and the underlying biological and environmental drivers of variation, with their time trend monitored during the 2009-2022 period.

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Article Synopsis
  • The study examined the presence of persistent organic pollutants (POPs) in the adipose tissue of male European brown bears in Croatia, focusing on polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) over two years (2021-2022).
  • Results showed that PCBs were significantly more prevalent than PBDEs, comprising over 94% of the total contaminant levels in the bears' tissues, with specific PCB congeners changing in concentration over time.
  • The findings indicate a generally low level of contamination in the Croatian terrestrial ecosystem, with some variation in pollutant levels possibly linked to seasonal changes in bear physiology.
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In recent years, especially since the COVID-19 pandemic, the number of predatory journals has increased significantly. Predatory journals exploit the "open-access model" by engaging in deceptive practices such as charging high publication fees without providing the expected quality and performing insufficient or no peer review. Such behaviors undermine the integrity of scientific research and can result in researchers having trouble identifying reputable publication opportunities, particularly early-career researchers who struggle to understand and establish the correct criteria for publication in reputable journals.

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