Search

Mitochondria have crucial roles in cellular energetics, metabolism, signalling and quality control1–4. They contain around 1,000 different proteins that often assemble into complexes and supercomplexes such as respiratory complexes and preprotein translocases1,3–7. The composition of the mitochondrial proteome has been characterized1,3,5,6; however, the organization of mitochondrial proteins into stable and dynamic assemblies is poorly understood for major parts of the proteome1,4,7. Here we report quantitative mapping of mitochondrial protein assemblies using high-resolution complexome profiling of more than 90% of the yeast mitochondrial proteome, termed MitCOM. An analysis of the MitCOM dataset resolves >5,200 protein peaks with an average of six peaks per protein and demonstrates a notable complexity of mitochondrial protein assemblies with distinct appearance for respiration, metabolism, biogenesis, dynamics, regulation and redox processes. We detect interactors of the mitochondrial receptor for cytosolic ribosomes, of prohibitin scaffolds and of respiratory complexes. The identification of quality-control factors operating at the mitochondrial protein entry gate reveals pathways for preprotein ubiquitylation, deubiquitylation and degradation. Interactions between the peptidyl-tRNA hydrolase Pth2 and the entry gate led to the elucidation of a constitutive pathway for the removal of preproteins. The MitCOM dataset—which is accessible through an interactive profile viewer—is a comprehensive resource for the identification, organization and interaction of mitochondrial machineries and pathways.

Risks of handheld electrical weapons include head impact trauma associated with uncontrolled falls, ocular probe penetration injuries, thermal injuries from the ignition of volatile fumes, and weapon confusion police-involved shooting. There is also an uncommon but critical risk of a shooting after a subject gained control of an officer’s electrical weapons. The authors searched for police shooting incidents involving loss of control of TASER® weapons via open-source media reports, crowd-sourced internet sites, litigation filings, and a survey of Axon law-enforcement master instructors. The authors report 131 incidents of subjects attempting to or gaining control of an officer’s electrical weapon from 2004 to 2020, 53 of which resulting in a shooting. These incidents demonstrated a risk of 11.8 shootings per million electrical weapon discharges (95% confidence limits of 9.0 to 15.1 per million by Wilson score interval). The use of electrical weapons presents a rare but real risk of injury and death from a shooting following a subject’s attempts to gain control of the weapon.

Background Literature shows that newly qualified nurse-midwives face challenges integrating into the workforce during their transition period from education to practice. However, little is known about the needs and challenges of Malawian nurse-midwives during their transition from education to practice. The aim of the study was to explore the transition experiences of newly qualified nurse-midwives working in selected midwifery units in Northern Malawi. Methodology A qualitative descriptive approach was used. Data were collected through in-depth interviews using semi-structured interview guides from a purposive sample of 19 participants (13 newly qualified nurse-midwives and 6 key informants). The researchers developed two interview guides; one for the newly qualified nurse-midwives and another one for the key informants. The interview guides had questions related to newly qualified nurse-midwives experiences of transitioning to practice and the support they received. Participants were from three selected hospitals in the Northern part of Malawi that have maternity units. Data were analysed manually using thematic analysis. Findings Five themes related to challenges faced by newly qualified nurse-midwives during their transition to practice in midwifery units emerged from the thematic analysis of the data. These included (1) Theory—practice gap, (2) Lack of confidence and skills, (3) Inadequate resources, (4) Transition support system, and (5) Workplace conflict. Conclusion Newly qualified nurse-midwives in Malawi encounter many challenges while transitioning from education to practice. The study findings underscore the need to develop a national framework support system that could not only help newly qualified midwives adjust positively to their new role but also create more opportunities for learning and developing and strengthening a collaborative partnership between colleges and hospitals.

Industrialism and colonialism have combined to produce climate change. Yet to date, climate action has largely failed to address colonialism and excluded indigenous peoples. Indigenous peoples’ rights and knowledge are not nice-to-have items for states, corporations and NGOs to keep in mind as they work to mitigate climate change. They are essential tools to enact change and protect the planet. Indigenous rights can be leveraged to safeguard the public from the harmful effects of fossil fuels and the environment from degradation. Indigenous knowledge can transform the way governments relate to indigenous peoples and the environment. In short, indigenous peoples play an essential role in the global fight against climate change.

While the physiologic effects of modern conducted electrical weapons (CEW) have been the subject of numerous studies, their effects on neurocognitive functioning, both short-term and long-term, are less well understood. It is also unclear how these effects compare to other use-of-force options or other arrest-related stressors. We compared the neurocognitive effects of an exposure to a TASER(®) (TASER International, Inc, Scottsdale, AZ) X26™ CEW to four other use-of-force scenarios during a training exercise using a well-established neurocognitive metric administered repeatedly over 1 h. Overall, we found that there was a decline in neurocognitive performance immediately post-scenario in all groups, but this effect was transient, of questionable clinical significance, and returned to baseline by 1 h post-scenario.