Unveiling the enzymatic pathway of UMG-SP2 urethanase: insights into polyurethane degradation at the atomic level.

The recently discovered metagenomic urethanases UMG-SP1, UMG-SP2, and UMG-SP3 have emerged as promising tools to establish a bio-based recycling approach for polyurethane (PU) waste. These enzymes are capable of hydrolyzing urethane bonds in low molecular weight dicarbamates as well as in thermoplastic PU and the amide bond in polyamide employing a Ser-Ser -Lys triad for catalysis, similar to members of the amidase signature protein superfamily. Understanding the catalytic mechanism of these urethanases is crucial for enhancing their enzymatic activity and improving PU bio-recycling processes.

Structural and Functional Characterization of an Amidase Targeting a Polyurethane for Sustainable Recycling.

Global plastic production exceeded 400 million tons in 2022, urgently demanding improved waste management and recycling strategies for a circular plastic economy. While the enzymatic hydrolysis of polyethylene terephthalate (PET) has become feasible on industrial scales, efficient enzymes targeting other hydrolyzable plastic types, such as polyurethanes (PURs), are lacking. Recently, enzymes of the amidase signature (AS) family, capable of cleaving urethane bonds in a polyether-PUR analog and a linear polyester-PUR, have been identified.

Implementing and assessing the acceptability of a portable, readily accessible, and actionable end of life planning tool for patients with advanced serious illness or frailty in southern New Zealand.

The Clinical Order Articulating Scope of Treatment (COAST) form was designed as a single-page medical order documenting and communicating the resuscitation status and scope of appropriate medical treatment for adult patients believed to be in their final year of life. Prior to introducing COAST, each health provider or agency in the Southland region of New Zealand had its own forms and processes; the COAST pilot attempted to consolidate and streamline these varied processes into one actionable medical order that is valid throughout the region. This three-phase initiative involved piloting use of the COAST form in Southland between May 2019 and January 2020.

Catalytic disconnection of C-O bonds in epoxy resins and composites.

Fibre-reinforced epoxy composites are well established in regard to load-bearing applications in the aerospace, automotive and wind power industries, owing to their light weight and high durability. These composites are based on thermoset resins embedding glass or carbon fibres. In lieu of viable recycling strategies, end-of-use composite-based structures such as wind turbine blades are commonly landfilled.

Integrating palliative surgery and palliative care.

We report a challenging patient journey at a rural New Zealand hospital affiliated with a hospice programme. This case illustrates the complexities and rewards of achieving a valuable and sensible collaboration among various teams to ensure the best possible outcome for surgical patients receiving palliative care.