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Metaxalone (Met), a drug for treatment of pain and stiffness due to muscular injuries, was covalently linked to poly(ethylene glycols) (PEG) via a chloroacetyl chloride spacer. The average weight molecular weights used for PEG are 4000, 6000 and 10,000, respectively, and the procedure of chemical modification for PEGs was conducted by a two-step protocol:(More)
The statistics about construction, process, investment, treatment effect of 72 sewage treatment plants show that the plant scale of county sewage treatment plants are less than 50,000m?/d in Guangxi. The mainly treatment processes are SBR and its variants process, A2/O, Oxidation ditch. The sewage treatment plant's investment of unit total construction and(More)
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