Protective Effect of Chitin Urocanate Nanofibers against Ultraviolet Radiation oleh Ikuko Ito, Toshikazu Yoneda, Yoshihiko Omura, Tomohiro Osaki, Shinsuke Ifuku, Hiroyuki Saimoto, Kazuo Azuma, Tomohiro Imagawa, Takeshi Tsuka, Yusuke Murahata, Norihiko Ito, Yoshiharu Okamoto, Saburo Minami