Protective Effect of Chitin Urocanate Nanofibers against Ultraviolet Radiation.

Urocanic acid is a major ultraviolet (UV)-absorbing chromophore. Chitins are highly crystalline structures that are found predominantly in crustacean shells. Alpha-chitin consists of microfibers that contain nanofibrils embedded in a protein matrix.

Construction of Thermokill Database R8100, an expanded version of a microbial thermal death database developed on the basis of information in research papers published from 1981 to 2000.

Following the former version of the database on the thermal death of microorganisms, ThermoKill Database R9100, we constructed an expanded version, ThermoKill Database R8100. This database includes the thermal death data together with as many as 70 items of experimental conditions described in research papers which appeared in 23 academic journals published worldwide from 1981 to 2000. The novel version contains 7,454 records as data sets, 12,261 D values, and 2,038 z values.

Preparation and biocompatibility of novel UV-curable chitosan derivatives.

UV-curable chitosans (UVCC-7-10) were synthesized using less-toxic agents. The UVCC-7 was completely cured by UV spot irradiation for 4 s. The UVCC-7 was implanted into murine subcutaneous tissues, and the response to the implantation was observed by histological examination at 7 days after implantation.