Objective To investigate the changes of cerebral oxygen extraction fraction (OEF) following acute cerebral infarction and its clinical value in old patients.

Fucoidan is a sulfated polysaccharide from brown seaweed, which has a variety of biological activities. the studies on the extraction, purification and fraction of fucoidan are summarized.

The extraction efficiency of organic light-emitting diode(OLED) is restrained by the high fraction of energy of the guided wave in the high-index materials(ITO/organic).