Quantifying Catalysis at the Origin of Life.

The construction of hypothetical environments to produce organic molecules such as metabolic intermediates or amino acids is the subject of ongoing research into the emergence of life. Experiments specifically focused on an anabolic approach typically rely on a mineral catalyst to facilitate the supply of organics that may have produced prebiotic building blocks for life. Alternatively to a true catalytic system, a mineral could be sacrificially oxidized in the production of organics, necessitating the emergent 'life' to turn to virgin materials for each iteration of metabolic processes.

Description of a new ultrasound sign to distinguish Crohn's anal fistula from cryptoglandular fistula: The rosary sign.

Aim: Endoanal and endorectal ultrasound are essential diagnostic tools for perianal fistula. Recent studies have examined ultrasound signs that help differentiate cryptoglandular anal fistula from perianal fistulizing Crohn's disease. The main aim of this work was to describe a new ultrasound sign for perianal fistula and to evaluate its ability to differentiate Crohn's disease from cryptoglandular anal fistula.

Exploring the impacts of the COVID-19 crisis for the employment prospects of refugees and people seeking asylum in Australia.

As recent research indicates, refugees and people seeking asylum are suffering disproportionately from the COVID-19 pandemic and have become more and more "shut out" and marginalised. An important pathway to integration and self-reliance is sustainable employment. To explore the impacts of COVID-19 on the employment prospects of refugees and people seeking asylum, we conducted 35 interviews with managers from Australian organisations that employ or assist refugees and asylum seekers in finding employment and 20 interviews with refugees and people seeking asylum.

Employment Precarity Strengthens the Relationships Between the Dark Triad and Professional Commitment.

The Dark Triad traits of Machiavellianism, narcissism, and psychopathy have been found to negatively impact work behaviors including information sharing, reporting of unethical conduct, and mistreatment of colleagues and subordinates. However, research has found the Dark Triad can also be related to forms of organizational commitment which underpin positive work behaviors, including engaging in tasks and duties beyond those required (i.e.

A new model for silicification of cyanobacteria in Proterozoic tidal flats.

Microbial fossils preserved by early diagenetic chert provide a window into the Proterozoic biosphere, but seawater chemistry, microbial processes, and the interactions between microbes and the environment that contributed to this preservation are not well constrained. Here, we use fossilization experiments to explore the processes that preserve marine cyanobacterial biofilms by the precipitation of amorphous silica in a seawater medium that is analogous to Proterozoic seawater. These experiments demonstrate that the exceptional silicification of benthic marine cyanobacteria analogous to the oldest diagnostic cyanobacterial fossils requires interactions among extracellular polymeric substances (EPS), photosynthetically induced pH changes, magnesium cations (Mg ), and >70 ppm silica.