Lactide is the midbody for the preparation of poly(lactic acid), the ratio of lactic acid to lactide is low and hamper the extensive application of PLA.
But those who favor the influx of the cheap labor force , on the other side, maintain that migrants are needed for the massive urban infrastucture contruction program.
3 At the present time the public health of our country has been seriously threatened after our country suffered cosmically foudroyant throe of the SARS, faced spreading of birds-flu virus.