After diacetyl (2,3-butanedione) was shown to cause bronchiolitis obliterans in workers who inhaled high levels of this volatile butter flavoring at microwave popcorn processing plants, 1,2,3 some manufacturers switched to a substitute assumed to be safer. Recent rodent studies, however, suggest that the substitute, 2,3-pentanedione, may be as damaging to the respiratory tract as the diacetyl i...

This paper describes the technological process for waste IC components reuse and studies its effect on the reliability of plastic IC components through some experiments. Results show that the high temperature thermal shock during printed circuit board (PCB) disassembly and appearance repair could lead to interfacial delamination and subsequent popcorn cracking in plastic IC packages. In the end...

To cite: Woodley-Cook J, Noel de Tilly L, MacDonald L. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2012007679 A 50-year-old man presented to the emergency department with a 4-week history of worsening ataxia. CT (figure 1) and MRI (figures 2 and 3) demonstrated a lobulated lesion of varying densities on CTand signal intensities on MRI (‘popcorn’ ball apperance...