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SUMMARY:Understanding surfactant behaviour to reduce friction in motor veh
 icles and Why don't we bleed to death?  Morphology\, gelation and drying i
 n droplets of human blood: tracking advective evolution - Beatrice Anna Ma
 ria Boggio Robutti\, University of Cambridge and Sheila Bhatt\, University
  of Cambridge
DTSTART:20231026T103000Z
DTEND:20231026T113000Z
UID:TALK207610@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:*Beatrice Anna Maria Boggio Robutti\n\nUnderstanding surfactan
 t behaviour to reduce friction in motor vehicles*\n\nMetal-metal contacts 
 within engines experience high levels of friction and wear\, which contrib
 ute to faster engine breakdown and to the production of harmful vehicle em
 issions. Organic friction modifiers (OFMs) are additives commonly utilised
  to minimise engine losses through the formation of planes of low shear re
 sistance between contacting metallic surfaces. OFMs are dosed into additiv
 es packages and their role is to enhance vehicle fuel economy.\n\nStearyld
 iethanolamine (SdEA) is a successful aminic OFM\, reported to also work fa
 vourably in tandem with common wear-reducing additive ZDDP. In this work\,
  we utilise a combination of conventional techniques and neutron scatterin
 g to understand the fundamental relationship between its molecular structu
 re\, bulk structure\, and surface structure. The effect of conventional bi
 ofuel-related impurities on SdEA behaviour is also investigated.\n\n*Sheil
 a Bhatt\n\nWhy don't we bleed to death?  Morphology\, gelation and drying 
 in droplets of human blood: tracking advective evolution*\n\nAn optical-ab
 sorbance technique has been used to observe the time-resolved formation of
  blood fraction droplet residue morphologies in drying human blood.  A ran
 ge of red blood cell volume fractions and plasma-dilutions has been studie
 d in order to track the advection of red blood cells and the formation of 
 residue morphology.  Recognising that blood has a complex interplay of bot
 h active (cellular) and passive (plasma protein) components\, we show that
  the plasma only drying morphology is modified by the presence of red bloo
 d cells\, and that diluting the plasma leads to a systematic and predictab
 le variation in the regions of the phase-diagram in which specific classes
  of  morphological residues appear.  Tracking the time-resolved peak forma
 tion and collapse leading to the observed final residue topology may shed 
 new light on the basis for predicting cracks and craquelure patterns\, and
  provide an avenue for point-of-care pre-diagnostics to classify blood beh
 aviour
LOCATION:Open Plan Area\, Institute for Energy and Environmental Flows\, M
 adingley Rise CB3 0EZ
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