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GeO2–C fibers were successfully synthesized using electrospinning homogeneous sol and subsequent calcination in an inert atmosphere. The spinnable sol was prepared by adding polyacrylonitrile (PAN) and polyvinylpyrrolidone (PVP) in a weight ratio of 1:1 into a mixture with white precipitate produced by dropping GeCl4 into DMF. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric...
A series of novel dimers of 15-membered macrolides was synthesized and evaluated. The dimers exhibited excellent activity against erythromycin-susceptible S. pneumonia, but did not show any improved activity against erythromycin-resistant S. pneumoniae encoded by erm gene.
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