Abstract: The present invention discloses a multi-mode imaging optical system. The multi-mode imaging optical system includes a stage configured to hold a to-be-tested sample. An imaging unit implements in-situ imaging of the to-be-tested sample. An absorption and forward scattering illumination unit irradiates the to-be-tested sample, and forms absorption imaging or forward scattered light imaging in the imaging unit. A side scattering illumination unit performs a first oblique illumination on the to-be-tested sample, so that scattered light of microparticles in the to-be-tested sample forms side scattered light imaging in the imaging unit. A fluorescent illumination unit performs a second oblique illumination on the to-be-tested sample, and excites the microparticles in the to-be-tested sample to emit fluorescence, where the fluorescence forms fluorescence imaging in the imaging unit.

Abstract: The present invention relates to an alkyl chitosan-graphene oxide composite sponge and preparation method and application thereof. The alkyl chitosan-graphene oxide composite sponge provided by the present invention includes alkyl chitosan and graphene oxide absorbed on the alkyl chitosan, and the adsorbing capacity of the graphene oxide is 3-28 wt. %. In the present invention, alkyl chitosan is used as a matrix to combine graphene oxide and alkyl chitosan; the obtained composite sponge has excellent hemostatic performance and blood absorption capacity. Results of embodiments indicate that the in-vitro whole blood coagulation time is less than 58 s, the hemostasis time of a rabbit femoral artery hemorrhage model is less than 155 s, the hemorrhage mass is less than 5.4 g, and the hemostatic effect is superior to a pure alkyl chitosan sponge or graphene oxide powder when the composite sponge provided by the present invention is used for hemostasis.

Abstract: The present invention relates to an alkyl chitosan-graphene oxide composite sponge and preparation method and application thereof. The alkyl chitosan-graphene oxide composite sponge provided by the present invention includes alkyl chitosan and graphene oxide absorbed on the alkyl chitosan, and the adsorbing capacity of the graphene oxide is 3-28 wt. %. In the present invention, alkyl chitosan is used as a matrix to combine graphene oxide and alkyl chitosan; the obtained composite sponge has excellent hemostatic performance and blood absorption capacity. Results of embodiments indicate that the in-vitro whole blood coagulation time is less than 58 s, the hemostasis time of a rabbit femoral artery hemorrhage model is less than 155 s, the hemorrhage mass is less than 5.4 g, and the hemostatic effect is superior to a pure alkyl chitosan sponge or graphene oxide powder when the composite sponge provided by the present invention is used for hemostasis.