David L . Barbeau

Learn More
The Antarctic Peninsula is considered to be the last region of Antarctica to have been fully glaciated as a result of Cenozoic climatic cooling. As such, it was likely the last refugium for plants and animals that had inhabited the continent since it separated from the Gondwana supercontinent. Drill cores and seismic data acquired during two cruises(More)
The Fuegian Andes form a principal component of the Scotia Arc (Fig. 1), whose widely debated tectonic history has implications for several geological phenomena associated with opening of Drake Passage (Lawver and Gahagan, 2003; Eagles et al., 2005; Livermore et al., 2005, 2007), including ocean circulation and polar glaciation (Kennett, 1977; Barker and(More)
BACKGROUND The quality of the physician-patient therapeutic relationship is a key factor in the effectiveness of care. Unfortunately, physicians and people living in poverty inhabit very different social milieux, and this great social distance hinders the development of a therapeutic alliance. Social competence is a process based on knowledge, skills and(More)
Highly potent and specific peptide hormone analogues with fluorescent reporter groups are current research goals. Until now, however, only moderately potent analogues have been described. We report here several types of vasopressin (VP) analogues with different fluorophores attached to the peptide. In a first series, fluorophores were attached to the free(More)
BACKGROUND Communication barriers between persons living in poverty and healthcare professionals reduce care effectiveness. Little is known about the strategies general practitioners (GPs) use to enhance the effectiveness of care for their patients living in poverty. OBJECTIVE The aim of this study was to identify strategies adopted by GPs to deliver(More)
Rats with neonatal ventral hippocampal (nVH) lesions show postpubertal hypersensitivity to dopamine agonists, which may be reversed by neuroleptic treatment. In addition, the immobility response (IR) may be regulated by dopaminergic activity. We investigated the influence of the IR caused by clamping the neck of rats that had received bilateral ibotenic(More)
The solution properties of human serum apolipoprotein A-II, both in the native and in the reduced forms, were investigated by the technique of sedimentation equilibrium in the analytical ultracentrifuge. For both proteins, the apparent weight average molecular weights determined in neutral buffer systems were found to be dependent on protein concentration(More)