对从连云港东西连岛海泥样品中分离得到的菌株Bacillus pumilus HX2-2的分类地位、生长条件和抑菌活性进行了研究。经过形态特征、生理生化性质及16S r DNA序列分析鉴定,该菌属于短小芽胞杆菌。不同温度、盐度、pH培养条件下测定菌液吸...对从连云港东西连岛海泥样品中分离得到的菌株Bacillus pumilus HX2-2的分类地位、生长条件和抑菌活性进行了研究。经过形态特征、生理生化性质及16S r DNA序列分析鉴定,该菌属于短小芽胞杆菌。不同温度、盐度、pH培养条件下测定菌液吸光度OD600值,表明该菌是一株轻度嗜盐菌,最适温度、盐度、pH分别为30℃、3%、7.0~8.0。在不同病原真菌的平板抑菌活性试验中,该菌对草莓尖胞镰刀菌、马铃薯炭疽病菌和水稻立枯丝核菌表现出显著的抑菌作用。菌株B.pumilus HX2-2是一株短小芽胞杆菌,具有广谱抑菌活性,具有进一步研究的价值。展开更多
Titanium is one of the best hydrogen loading material. The pre dieted maximum loading ratio of hydrogen in titanium may reach to 2.0. In this work, a titanium layer on molybdenum substrate was deuterated with the atom...Titanium is one of the best hydrogen loading material. The pre dieted maximum loading ratio of hydrogen in titanium may reach to 2.0. In this work, a titanium layer on molybdenum substrate was deuterated with the atomic: ratio X =2H/Ti≥1.6. The change of the surface topography and rnicrostructurc of the sample before and after loading was observed by using Scan Electron Microscopy (SEM). The surface segregation of the samples after deutcron bombardment was also observed. A fluctuatingly-incrcasing trend of the deutcriuin density in titanium target was detected in the deuteron implantation experiments. which indicated a suddenly explosion (segregation) or fast diffusion of deuterium in the titanium. Significant amount of nitrogen contamination was found in thc Ti2Hx sample by nuclear reaction analysis (NRA), which indicated that the Ti2Hx structure might have the feature to trap nitrogen from air. The nitrogen contamination in Ti2Hx significantly affects the increase of the atomic ratio X展开更多
基金Supported by a fund of the Chinese Academy of Sciences the special fund of the Nuclear Power Institute of China
文摘Titanium is one of the best hydrogen loading material. The pre dieted maximum loading ratio of hydrogen in titanium may reach to 2.0. In this work, a titanium layer on molybdenum substrate was deuterated with the atomic: ratio X =2H/Ti≥1.6. The change of the surface topography and rnicrostructurc of the sample before and after loading was observed by using Scan Electron Microscopy (SEM). The surface segregation of the samples after deutcron bombardment was also observed. A fluctuatingly-incrcasing trend of the deutcriuin density in titanium target was detected in the deuteron implantation experiments. which indicated a suddenly explosion (segregation) or fast diffusion of deuterium in the titanium. Significant amount of nitrogen contamination was found in thc Ti2Hx sample by nuclear reaction analysis (NRA), which indicated that the Ti2Hx structure might have the feature to trap nitrogen from air. The nitrogen contamination in Ti2Hx significantly affects the increase of the atomic ratio X