Integrated biomedical device for blood preparation

The separation of red blood cells from plasma flowing in microchannels is possible by bio-physical effects such as an axial migration effect and Zweifach-Fung bifurcation law. In the present study, subchannels are placed alongside a main channel to collect cells and plasma separately. The addition of a constriction in the main microchannel creates a local high shear force region, forcing the cells to migrate and concentrate towards the centre of the channel. The resulting lab-on-a-chip was manufactured using biocompatible materials. Purity efficiency was measured for mussel and human blood suspensions as different parameters including flow rate and geometries of parent and daughter channels were varied.

'Tell me Your story applied': ethics in narrative research with young fathers

There has been a significant increase of interest in parents who are considered to be outside of normative discourses; specifically the 'moral panic' relating to an increase in the demography of teenage mothers in the UK (SEU, 1999, 2003; Swann et al., 2003). Recently research has turned to the experiences of parenting from the father's perspective (Daniel and Taylor, 1999, 2001) although there remains a significant gap focusing on the experiences of young fathers. It is argued by Swann et al. (2003) that young fathers are a difficult group to access and this has limited the amount and type of studies conducted with many studies on young parents looking at the role of the father through the eyes of the mother. This contribution focuses on the use of narrative interviews with a small group of young, vulnerable, socially excluded fathers who are users of the statutory social services in the UK. The article looks specifically at the ethics and practical challenges of working with this group and offers insights into the use of the narrative method and the ethical dilemmas resulting from it.