ABSTRACT
The reductive catalytic fractionation (RCF) of lignocellulose, considering lignin valorization at design time, has demonstrated the entire utilization of all lignocellulose components; however, such processes always require catalysts based on precious metals or high-loaded nonprecious metals. Herein, the study develops an ultra-low loaded, atomically dispersed cobalt catalyst, which displays an exceptional performance in the RCF of lignocellulose. An approximately theoretical maximum yield of phenolic monomers (48.3 wt.%) from lignin is realized, rivaling precious metal catalysts. High selectivity toward 4-propyl-substituted guaiacol/syringol facilitates their purification and follows syntheses of highly adhesive polyesters. Lignin nanoparticles (LNPs) are generated by simple treatment of the obtained phenolic dimers and oligomers. RCF-resulted carbohydrate pulp are more obedient to enzymatic hydrolysis. Experimental studies on lignin model compounds reveal the concerted cleavage of Cα-O and Cß-O pathway for the rupture of ß-O-4 structure. Overall, the approach involves valorizing products derived from lignin biopolymer, providing the opportunity for the comprehensive utilization of all components within lignocellulose.
ABSTRACT
BACKGROUND: Little has been written on the availability of specialist level 2 supervision groups to support community practitioners regarding the emotional components of their palliative and end-of-life caseload. Adapted level 2 groups (AL2Gs) have been piloted in three community teams in the NHS to address this. AIMS: This study aimed to evaluate whether access to AL2Gs benefited community palliative and end-of-life practitioners at three sites. The outcomes for those who attended and those unable to attend were considered. FINDINGS: Attendees found AL2Gs beneficial, reporting better confidence and wellbeing, plus a sense of containment through group cohesion and trust in the facilitators and fellow AL2G members. Most would recommend the groups to all staff working in community palliative care. Practitioners who were not able to attend relied on informal and ad-hoc peer support, and had concerns about their skills in managing patients' psychological needs. CONCLUSION: Community nurses benefit from attending AL2Gs to support them with their palliative care/end-of-life caseloads. It is recommended that all community staff involved in this type of care have access to regular clinical supervision, especially in a group format.
Subject(s)
Hospice and Palliative Care Nursing , Terminal Care , Humans , Preceptorship , Palliative Care , DeathABSTRACT
A round-the-clock photocatalyst with energy-storage ability has piqued the interest of researchers for removing microbial contaminants from indoor environments. This work presents a moderate round-the-clock method for inhibiting the growth of fungus spores on bamboo materials using Ag-modified TiO2 thin films. Photoactivated antifungal coating with catalytic memory activity was assembled on a hydrophilic bamboo by first anchoring anatase TiO2 thin films (TB) via hydrogen bonding and then decorating them with Ag nanoparticles (ATB) via electrostatic interactions. Antifungal test results show that the Ag/TiO2 composite films grown on the bamboo surface produced a synergistic antifungal mechanism under both light and dark conditions. Interestingly, post-illumination catalytic memory was observed for ATB, as demonstrated by the inhibition of Aspergillus niger (A. niger) spores, in the dark after visible light was removed, which could be attributed to the transfer of photoexcited electrons from TiO2 to Ag, their trapping on Ag under visible-light illumination, and their release in the dark after visible light was removed. The mechanism study revealed that the immobilized Ag nanoparticles served the role of "killing two birds with one stone": increasing visible-light absorption through surface plasmon resonance, preventing photogenerated electron-hole recombination by trapping electrons, and contributing to the generation of âO2-and âOH. This discovery creates a pathway for the continuous removal of indoor air pollutants such as volatile organic compounds, bacteria, and fungus in the day and night time.
