Dual-emission center ratiometric fluorescence probes based on biomass carbon dots for metal ions detection in water and three-level anti-counterfeiting.

Background: In the contemporary era of rapid digital advancement, information security is closely associated with our daily life. From personal information to state secrets, all domains are intricately linked with information. Consequently, the significance of information security has garnered growing attention from an ever-increasing number of individuals.

[Optimization of processing technology for pieces of sulfur-free Chinese yam].

Objective: To optimize the best gradient drying technology of pieces of sulfur-free Chinese yam, and provide technique parameter for processing of pieces of sulfur-free Chinese yam.

Methods: Determined the content of polysaccharide by UV and the content of allantoin by HPLC. The optimum gradient drying technology of pieces of sulfur-free Chinese yam was investigated by orthogonal experiment and single factor experiment and the contents of polysaccharide and allantoin were regarded as the investigated indexes.