作者机构：
[Luo, Qinghai; Zhang, Pengfei] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Peng, Wenwu] Hunan Vocat Coll Technol Econ & Commerce, Hengyang 421001, Peoples R China.
通讯机构：
[Luo, Qinghai] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称：
2nd International Conference on Manufacturing Science and Engineering
会议时间：
APR 09-11, 2011
会议地点：
Guilin, PEOPLES R CHINA
会议主办单位：
[Luo, Qinghai;Zhang, Pengfei] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.^[Peng, Wenwu] Hunan Vocat Coll Technol Econ & Commerce, Hengyang 421001, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
CNC Vertical Boring-milling Machine;Rigidity of Principal Axis;Structure Improvement
摘要：
The rigidity of the principal axis of a CNC vertical boring-milling machine was analyzed, and the belt tension and end deformation were also calculated. A project was proposed to improve the structure of the principal axis for finish machining. After the discharge belt pulley was applied on the principal axis, the force transmission and the rigidity of principal axle system were improved considerably. The design and process means were proposed for the three added parts of the improved structure. The improved structure is simplified, secure and low-cost. The machining precision was increased, and the fixing was also become convenient.
作者机构：
[Yang Jing; Song Jina; Lv Zhiwei; Du Kun] Hebei Univ Engn, Inst Urban Construct, 199 GuangMing St S, Handan 056038, Hebei, Peoples R China.;[Du Jiyong] Handan Polytech Coll, Handan 056038, Hebei, Peoples R China.;[Xie Shuibo] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yang Jing] H;Hebei Univ Engn, Inst Urban Construct, 199 GuangMing St S, Handan 056038, Hebei, Peoples R China.
会议名称：
2011 International Conference on Environmental Biotechnology and Materials
Engineering(2011年环境生物技术与材料工程国际会议)
会议时间：
2011-03-26
会议地点：
哈尔滨
会议主办单位：
Harbin Univ Commerce
会议论文集名称：
2011 International Conference on Environmental Biotechnology and Materials
Engineering(2011年环境生物技术与材料工程国际会议)论文集
关键词：
Adsorption;Citrobacter freudii;Uranium
摘要：
Biosorption has been developed as an effective and economic method to treat wastewater containing low concentrations of metal pollutants. In this study, a bacterium, Citrobacter freudii, was used as a biosorbent to adsorb uraniumions. The factors which influence the adsorption of uranium by Citrobacter freudii were investigated, including pH, the strain dosage and the initial concentrate of uranium. The results showed that the adsorption efficiency increased with the increased of pH in the beginning of the adsorption and reached its maximum at pH 6; when the strain dosage and the initial concentrate of uranium were 6.0g/L and 20mg/L, respectively, the adsorption efficiency reached 93.89% and 94.68%, respectively. The authors investigated the active sites of bacteria for biosorption and the results proved that carboxyl in the cell wall played an important role in biosorption.
作者：
Li Li;He Xiu-Sheng*;Luo Qiao;Zhang Zhi-Wei;Yao Xu-Jiong;...
期刊：
生物化学与生物物理进展,2011年38(3):248-253 ISSN：1000-3282
通讯作者：
He Xiu-Sheng
作者机构：
[Wang Li-Li; Zhang Zhi-Wei; Luo Qiao; Duan Rong; He Xiu-Sheng; Yao Xu-Jiong; Li Chun-Cheng; Li Li; Chen Su-Qiong] Univ S China, Canc Res Inst, Hengyang 421001, Peoples R China.;[Chen Zhu-Chu] Cent S Univ, Canc Res Inst, Changsha 410078, Peoples R China.
通讯机构：
[He Xiu-Sheng] U;Univ S China, Canc Res Inst, Hengyang 421001, Peoples R China.
