Publications by authors named "J Jeffreys"

Article Synopsis
  • The Younger Dryas Impact Hypothesis suggests that around 12,800 years ago, Earth was hit by debris from a disintegrating comet, causing widespread airbursts and dust in the atmosphere.
  • New evidence supporting this hypothesis has been found in ocean sediments from Baffin Bay, which show impact-related materials consistent with cometary dust.
  • The findings indicate that this significant impact event may have led to major climate changes, including cooling and flooding, highlighting the importance of ocean records in understanding past catastrophic events.
View Article and Find Full Text PDF

Aim: Despite a recent increase in the use of ventilators in the home setting for children with chronic respiratory failure, there is currently no unified approach for clinical decision-making for children requiring long-term mechanical ventilation. The purpose of this study is to understand the clinician's perspective on decision-making around home ventilation for children, and how home-based care contributes to successful outcomes in this population.

Methods: We recruited physicians and home ventilation nurses with at least 2 years' experience working in an Australian paediatric tertiary home ventilation service using professional networks and snowball sampling.

View Article and Find Full Text PDF

Technological advances in mechanical ventilation have made home care possible for children requiring long-term ventilation. However, there are ethical and logistical challenges to transitioning home. The aim of this narrative review is to identify the experiences of the children and their families and the decision-making process to embark on home mechanical ventilation.

View Article and Find Full Text PDF

5-HT receptors are members of the family of pentameric ligand gated ion channels (pLGICs). Each subunit has four transmembrane α-helices (M1-M4), with M4 being most distant from the central pore. Residues in this α-helix interact with adjacent lipids and the neighboring M1 and M3 helices, contributing to both receptor assembly and channel function.

View Article and Find Full Text PDF

GABAρ receptors are a subfamily of the GABA receptor family of pentameric ligand-gated ion channels (pLGICs). Each of the five subunits has four transmembrane α-helices (M1-M4), with M4 most distant from the central pore. Aromatic residues in this M4 helix are important for receptor assembly in pLGICs and also may interact with adjacent lipids and/or residues in neighboring α-helices and the extracellular domain to modify or enable channel gating.

View Article and Find Full Text PDF