This article deals with the influences of K2O on the acidity and MCH dehydrogenation stability of industry Pt-Sn/Al2O3 catalyst by pyridine-IR, adsorption and desorption of NH3 ,thermogravimetry(TG),DSC and MCH dehydrogenation.

Under the thermal and oxygen-containing conditions, the influence of theirs processing stability, resin homogeneity, process condition and properties on BOPP film formability are analyzed.

The results showed that the BR containing antioxidant 2246 had higher oxidation temperature, longer oxidation induction period,more stable processing stability and better ability of thermal-oxidative aging and weathering resistance in contrasted with those Of BR containing the same amount of antioxidant 264.

In this case, the influencing rules of frequency, voltage and electrolyte concentrations on machining gap as well as the section of electrode on machining stability were studied through experiment analysis in high frequency short pulse electrochemical micromachining.

Effect of hydrophilic colloid on thermal stability of low fat meat emulsion products;

The relationship between the stable hydrogen isotope in cattle tissues and the longitude,latitude and altitude of the region was analyzed,and the feasibility of applying the stable hydrogen isotope to trace the beef geographical origin in China was discussed.