离子束注入法诱变选育耐高糖衣康酸高产菌株

采用 2 0keV不同剂量的低能氩离子束和氮离子束注入土曲霉T730 ,选育出耐高糖衣康酸高产菌株HA8。该菌株可以在蔗糖初始浓度为 15 %和 2 0 %的培养基中摇瓶发酵 4～ 5d ,产酸率分别达到 9.2 %和 11.5 % ,糖酸转化率分别达到 6 1.3%和 5 7.5 % ,比出发菌株T730的产酸率提高了 74 %。

高度隔离过渡金属催化剂及其催化烯烃环氧化反应

介绍了过渡金属杂原子分子筛的骨架杂原子表征、用离子注入法和化学嫁接法制备高度隔离过渡金属催化剂及其催化烯烃环氧化研究的结果 .基于共振拉曼原理 ,用紫外共振拉曼光谱明确鉴别了TS 1,Fe ZSM 5和V MCM 41等分子筛中的骨架杂原子 .用离子注入法和化学嫁接法制得具有高度隔离过渡金属离子的非杂原子分子筛催化剂 .烯烃环氧化反应结果表明 。

Modification of the Properties of Cu_x S Thin Films by Low Energy Ion Beam Implantation

Cu x S thin films are implanted by low energy N + ion beam. The influences of the energy and dose of N + ion implantation on Cu x S films are investigated. The results show that the ratio of copper to sulfur is increased to some extent, the constituents of the film are turned to rich copper phase from rich sulfurous phase after ion beam irradiation. X-ray diffraction spectrum and optical transmission spectra of sample have confirmed the results.