Solid state reaction between La (Ac)3·3/2H2O and 8-hydroxyquinoline (Oxine)was studied at a low heating temperature. La (Oxine)3 was synthesized by one step solid state reaction at 60℃, and the product is charac...Solid state reaction between La (Ac)3·3/2H2O and 8-hydroxyquinoline (Oxine)was studied at a low heating temperature. La (Oxine)3 was synthesized by one step solid state reaction at 60℃, and the product is characterized by elementary analysis, IR, XRD,photoacoustic spectra and flourenscence spectra. The influence of the temperature on solid state reaction was discussed.展开更多
The effect of La, Ce was firstly tested on growth of the Taxus(T.) cuspidata cell suspensions, biosynthesis and release of taxol. The results indicate that the growth pattern of T.cuspidata cells is altered si...The effect of La, Ce was firstly tested on growth of the Taxus(T.) cuspidata cell suspensions, biosynthesis and release of taxol. The results indicate that the growth pattern of T.cuspidata cells is altered significantly by adding high concentration of rare earth in the medium. The lag and exponential phases of cell growth are shortened, the stationary phase disappears and the biomass fluctuates periodically during the decline phase. The rare earth compounds added in the exponential phase obviously increase the taxol biosyntheis and release yields of T.cuspidata cells, and the supplement of carbon source in the medium containing rare earth is also favorable to taxol biosynthesis.展开更多
文摘Solid state reaction between La (Ac)3·3/2H2O and 8-hydroxyquinoline (Oxine)was studied at a low heating temperature. La (Oxine)3 was synthesized by one step solid state reaction at 60℃, and the product is characterized by elementary analysis, IR, XRD,photoacoustic spectra and flourenscence spectra. The influence of the temperature on solid state reaction was discussed.
文摘The effect of La, Ce was firstly tested on growth of the Taxus(T.) cuspidata cell suspensions, biosynthesis and release of taxol. The results indicate that the growth pattern of T.cuspidata cells is altered significantly by adding high concentration of rare earth in the medium. The lag and exponential phases of cell growth are shortened, the stationary phase disappears and the biomass fluctuates periodically during the decline phase. The rare earth compounds added in the exponential phase obviously increase the taxol biosyntheis and release yields of T.cuspidata cells, and the supplement of carbon source in the medium containing rare earth is also favorable to taxol biosynthesis.
