This invention relates to optically active support materials which include one or more esters and/or one or more carbamates and/or one or more mixed ester and carbamate compounds of polysaccharide or oligosaccharide, and an organic and/or inorganic substrate.

 
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< Submersible hollow shaft motor and submersible floating aerator comprising the same

> Swing-type submersible floating aerator

> Rotary disc filter and module for constructing same

~ 00550