Preparation and properties of dual-wavelength excitable fluorescent Lyocell fibers and their applications in papermaking.

Two kinds of dual-wavelength excitable fluorescent Lyocell fibers, which can be excited by short-wavelength UV/IR or long-wavelength UV/IR radiation, were prepared by dry-jet wet spinning. These fluorescent Lyocell fibers can emit two different fluorescence wavelengths at two different excitation wavelengths, exhibiting double anti-counterfeiting functions, thereby providing higher security. SEM-EDX analysis showed the uniform phosphors distribution in Lyocell fibers.

Immobilization and characterization of tannase from a metagenomic library and its use for removal of tannins from green tea infusion.

Tannase (Tan410) from a soil metagenomic library was immobilized on different supports, including mesoporous silica SBA-15, chitosan, calcium alginate, and amberlite IRC 50. Entrapment in calcium alginate beads was comparatively found to be the best method and was further characterized. The optimum pH of the immobilized Tan410 was shifted toward neutrality compared with the free enzyme (from pH 6.