The actual state， hazards， and prevention and comprehensive treatment of "White Pollution"Abstract: The invention of plastic bag brings people lots of However， with widespread use and lack of environmental awareness， plastic bags have generated some hazards to the life of Along with the development of economy， "White pollution" has been becoming a public which negatively affect the sustainable China has employed various manners to prevent and treat it to return the green to earth Key words:"White pollution"， actual state in our country hazard， reasons of formation， prevention manners， comprehensive treatment
Abstract Chitosan (Chitosan) and film-forming properties of polyvinyl pyrrolidone (PVP) dissolved outstanding performance， made of composite membrane， through the composite membrane-embedded and glyoxal cross-linking role of the glassy carbon electrode have a common fixed-horseradish dismutase enzymes and hemoglobin (Hb)， Fe (CN) 63-/4- body as an electronic Through cyclic voltammetry study of a variety of electrochemical properties of Experiments prove that the production of this biosensor is simple， selective and sensitive， H2O2 concentration in the linear range of 0 × 10-8 ~ 1 × 10-7 mol / L， the sensor detection limit is 0 × 10-8 mol / L， its The optimum pH of 5， the optimum temperature of 20 ℃ Key words horseradish peroxidase; modified glassy carbon electrode; chitosan; hemoglobin
Abstract: The hot water prepared by CeO2 carrier， then deposited a total of precipitation and precipitation were prepared the corresponding Au / CeO2 catalyst， to probe for CO oxidation reactions， inspected the catalyst of the different methods of catalyst Performance of， and through X-ray diffraction (XRD) and transmission electron microscopy (TEM characterization of the carrier means and the catalyst structure was characterized， analyzed the impact of the catalytic activity of the reasons for experimental results show that hot water Preparation CeO2 small size of the vector (18 nm or so) and evenly distributed from the electron microscope to map clear to see that CeO2 (111) of crystal lattice Au / CeO2 catalyst in a deposition precipitation load and get the Au Au / CeO2 catalyst for the highly decentralized in the grain carrier surface and the active component and closer contact with the carrier， compared with the carrier demonstrated a high catalytic Key words: Au / CeO2 catalyst， hydrothermal， CeO2 carrier， CO activity
