Publications by authors named "J Schumann"

Background: As the burden of cardiovascular disease grows, so does the number of cardiac surgeries. Surgery is increasingly performed on older people with comorbidities who are at higher risk of developing perioperative complications such as low cardiac output state (LCOS). Surgery-associated LCOS represents a serious pathology responsible for substantial morbidity and mortality.

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Article Synopsis
  • The study aimed to explore how variations in the unregulated drug market affect the risk of heroin overdose among individuals with differing personal overdose risk levels.
  • Conducted over a year at the Medically Supervised Injecting Room in Melbourne, the research analyzed 1,474 overdose cases involving 337 participants, mostly male, with an average age of 43.5 years.
  • Findings revealed that the overdose rate was significantly higher on days with high overdose risk, suggesting a 10-fold difference in daily overdose risk linked to market variations.
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Superfund is a federal program established in 1980 to manage the cleanup of hazardous waste sites across the United States. Given the health and economic costs borne by people living near these sites, any demographic disparities within the Superfund program are issues of environmental justice. We investigate whether racial demographics local to a Superfund site are associated with its cleanup status, and if so, how.

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Bringing molecules together on a catalytic surface is a prerequisite for bimolecular and recombination reactions. However, in the absence of attractive interactions between reactants, such as hydrogen bonds, this poses a challenge. In contrast, based on density functional theory, we show that coadsorption at active sites of single-atom alloys (SAAs) is favored and that coadsorption is a general phenomenon observed for catalytically relevant adsorbates on a broad range of SAAs under temperature and pressure conditions commonly employed for catalysis.

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