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A novel arginine-rich chitosan (CS) derivates mimicked cell penetration peptides; N-Arginine chitosan (N-Arg-CS) was prepared by two reaction methods involving activated L-arginine and the amine group on the chitosan. FTIR spectra showed that arginine was chemically coupled with CS. Elemental analysis estimated that the degrees of substitution (DS) of(More)
Schwann cells play an important role in the peripheral nervous system, especially in nerve repair following injury, so artificial nerve regeneration requires an effective technique for obtaining purified Schwann cells. In vivo and in vitro pre-degeneration of peripheral nerves have been shown to obtain high-purity Schwann cells. We believed that in vitro(More)
Subway station (hereinafter referred to as station) is composed of main module and extended module, this article is mainly to the design of extension module. The extension module adopts the STM32F107VCT6 single-chip microcomputer based on the ARM architecture control buttons scanning and the LED bright, then transmitting to the main module which is in A8(More)
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