In recent years, with the aggravating of environmental pollution, the purification of carbon monoxide is currently a subject of interest. The catalytic oxidation method is an effective way. Manganese oxide nanoparticles were prepared by emulsion self-assembly method and then, synthetic and commercial manganese oxide-supported gold nanoparticle catalysts were successfully synthesized by the deposition-precipitation (DP) method. The catalysts were characterized by XRD, Raman, BET, ICP and HRTEM. The activity of the oxide and oxide-supported gold nanoparticle catalysts were evaluated on the fixed bed microreactor and Au/MnOx had the highest activity. The intrinsic activity of Au/MnOx at 35 °C is 0.81 molCO·mol-1Au·min-1. Compared with O2, CO concentration has bigger effect on the reaction activity.

A microwave-induced catalytic removal device was designed and set up for studying removal of hazardous or toxic gas from contaminated air. Catalytic oxidative Removal ratios of several hazardous gases of VOCs, CO and H2under microwave field were tested. Results suggested that structure of hazardous gas and catalyst type were main factors affecting the removal efficiency of hazardous gas. Oxidative catalyst contributed to removal of reductive gas. In addition, the flow rate also affected the removal efficiency.

Three oxidant decontaminants, including NaClO, H2O2 and an organic peroxyl acid, were introduced to destroy the cyanide ion. The residual cyanide ion concentrations in different decontamination water were detected by a cyanide ion selective meter. Before the detection process, the oxidants left in the cyanide decontamination water were pretreated by adding a certain amount of Na2SO3. Results showed that starch-iodide solution indicator method presented a perfect function on determining the dosage of Na2SO3. Values of the relative mean deviations on residual cyanide detection were below 5%. After the decontamination water was deoxidized by Na2SO3, whether the sample distillated or not could not affect the value of CN- quite much. Non-distillation was confirmed alternative in the detection of cyanide ion decontamination water. Too much standing time would lead to a relatively lower CN- concentration, especially in that of non-distillation.

Background Galectin-1 is a β-galactoside-binding protein overexpressed in the pancreatic stellate cells (PSCs) of pancreatic ductal adenocarcinoma (PDAC), while its expression is typically low in pancreatic cancer cells (PCCs). The point at which galectin-1 expression in PCCs increases, and its association with PDAC progression, have been unclear. Methods Galectin-1 expression in PDAC and metastatic lymph nodes was investigated using an immunohistochemical assay. PANC-1 PCC cells were co-cultured with PSCs expressing different levels of galectin-1. Subsequently, galectin-1 was overexpressed in PANC-1 cells using recombinant lentiviruses, and their proliferation, invasion, anchorage-independent growth, and in vivo tumorigenicity were evaluated. Results There was intermediate galectin-1 expression in PCCs, and it was positively associated with galectin-1 expression in PSCs in the PDAC tissues. Galectin-1 was strongly expressed in the metastatic lymph nodes. In the co-culture, high galectin-1 expression in the PSCs increased the galectin-1 expression in the PANC-1 cells. The galectin-1 overexpression in the PANC-1 cells enhanced their clone formation ability, proliferation, and invasion, increased the expression of proliferating cell nuclear antigen (PCNA) and BCL-2, and decreased Bax expression, promoting the establishment and growth of tumors. Conclusion High galectin-1 expression in PSCs induces galectin-1 expression in PCCs and subsequently promotes the malignant biological behavior of PDAC.