Jie Zhang,Xuemeng Tian,Chaochao Dong,Ruixia Gao,Yuan Hu
There is a growing awareness of practices focused on the in-depth treatment and decontamination processes of firefighters’ personal protective equipment to decrease health risks. Hence, TiO2-nanoparticle-modified Cu-doped BiOBr microflowers (BiOBr–Cu2+/TiO2) have been devised and used as effective constituents to construct a type of decontamination agent that can efficiently and deeply eliminate hazardous chemicals. The 3D microflowers can be admirable carriers for the prevention of aggregation and outstanding adsorption, and the construction of a heterojunction based on the copper-doping strategy and sequential harvesting of light strategy provides enhanced light absorbance and efficient charge separation. The proposed materials have a nanoparticle-interspersed microflower morphology, enhanced light-harvesting ability, and excellent transfer of photogenerated carriers, leading to more effective adsorption and solar-light-driven photocatalytic activity than other catalysts. Moreover, the BiOBr–Cu2+/TiO2 composites mixed with different solvents can be used as decontamination agents for the in-depth treatment of hazardous chemicals under different situations. It is believed that employing heterojunctions as the constituents of decontamination agents has promise to become an effective and feasible method for deep decontamination processes in firefighting work.
In this work, we have investigated the washing performance of sodium oxalate-based detergents containing different enzymes (protease, lipase and cellulase). The results show that sodium oxalate-based detergents with enzymes have a better washing performance than formulations containing the conventional builder STPP and zeolite 4A. For sodium oxalate-based with protease, the amount of sodium oxalate and protease have a significant effect on the detergency. Lipase can improve detergency of sodium oxalate-based detergents after “first washing” in the presence of different anionic surfactant (LAS, MES and AES). For cellulase, only sodium oxalate in the presence of LAS has a detergency increase.
Decellularization treatment has been widely used to decrease the potential immunogenicity and improve the anticalcification properties of bio-derived materials, which may be utilized as an alternative method for the preparation of bioprosthetic heart valves. However, the excessive decellularization treatments will deteriarate the properties of heart valves. Among the decellularizaton parameters, detergent concentration and processing time are considered as those of the most key factors. Therefore, it should be meaningful to balance the decellularization efficiency and properties of bioprosthetic heart valves by optimizing the detergent concentration and processing time. In this study, three groups of the decellularized heart valves treated by sodium deoxycholate (SD) with different concentration and processing time were investigated through histological, biochemical, and mechanical analysis. Similar decellularization efficiency can be concluded through histological staining, DNA and α-Gal quantification results. Extracellular matrix contents quantification and tensile test results revealed that there is no obvious difference among the three decellularized heart valves. in vitro cytotoxicity assay showed that the remnant detergent is not enough to cause cell death, which indicated that the decellularized porcine aortic heart valves may be suitable for further in vivo research. In conclusion, Triton X-100/SD may be a suitable protocol used for heart valves decellularization. And it is feasible to vary the detergent processing time by changing the detergent concentration without compromising the decellularization efficiency.
危险品化学品经营许可证（带存储）