摘要：Studies on the adsorption of Pd 2+ ion by Nitzschia hantzschiana Rabh., a diatom were carried out. Uniform design was used to arrange the experiment. The growth period of diatom, adsorption time, concentration of Pd 2+ and pH were found to have positive effects on the adsorption amount of Pd 2+ on diatom. The optimum conditions are: the growth period of diatom 12 days, adsorption time=6 h, \=0.01 g/L and \ =0.16 mol/L. EPMA analysis showed that the diameter of the reduced adsorbed Pd was about 1 μm. A mathematical model was found to describe experimental data, that the adsorption fits to Freundlich equation, Q=70.2\ 0.76. The adsorption amount of Pd 2+ on diatom increased logarithmically with the increase of Pd 2+ concentration.

摘要：对松口蘑和假松口蘑进行ITS序列测序,通过DNAStar软件比较分析,发现松口蘑与假松口蘑的5.8SrDNA序列完全一致,ITS1和ITS2呈现不同程度的多态性。松口蘑ITS序列长度为601bp,假松口蘑ITS序列长度为563bp。设计了扩增松口蘑和假松口蘑ITS1的特异性引物,能够快速地区别松口蘑与假松口蘑。

摘要：本文设计了松茸菌丝体生长的基础培养基,采用液体培养方法,研究了 14种氮源物质、2 0种碳源物质和 2 2种生长因子类物质对松茸双核菌丝体生长的影响。结果表明,麦芽汁、糖蜜及麸皮浸出液、蛋白胨等可作为松茸菌丝体生长的较理想的碳源或氮源物质,酵母膏和松根浸出液对松茸菌丝体的营养生长有明显的促进作用。