Tetraphenylethene-modified polysiloxanes: Synthesis, AIE properties and multi-stimuli responsive fluorescence.

Herein, polysiloxane-based aggregation-induced emission (AIE) polymers and rubbers were prepared which display interesting multi-stimuli responsive fluorescence. TPE-modified polydimethylsiloxanes (PDMS-TPE) as polysiloxane-based AIE polymers were synthesized through Heck reaction of bromo-substituted tetraphenylethene (TPE-Br) and vinyl polysiloxanes. As expected, TPE moiety endows the modified polysiloxane with typical AIE behavior.

[An analysis of physiological load intensity in the course of track and field studies offered in general colleges].

This investigation was directed to the physiological load intensity in the curricula of track and field studies offered in 8 general colleges. We adopted the sampling survey method and monitored the heart rate of 80 first-year students who were from different grades in 8 colleges and were attending the track and field class. The data collected from these male student show: (1) The pre-exercise heart rate is 80 per minute; the first inflection point appears at 28 minutes after exercise; the heart rate is 132 per minute and the slope is -0.