作者：
Fan Li;Zhao Yunlin;Shu Wensheng;Huang Huimin;Xu Zhenggang
作者机构：
Hunan Research Center of Engineering Technology for Utilization of Environmental and Resources Plant,Central South University of Forestry and Technology,498 Shaoshan South Road,410004 Changsha,Hunan Province,China
摘要：
To combine phytoremediation plants and microorganisms is a promising method of repairing heavy metal contaminated soil.In this study,two manganese-tolerant strains isolated from Mn slag and identified as B.cereus HM5 and B.thuringiensis HM7.These two Bacillus spp.species have the ability to dissolve phosphorus,produce IAA and iron carrier.A pot experiment of Broussonetia papyrifera was conducted to test the growth,root structure and activity,and accumulation of Mn with B.cereus HM5 and B.thuringiensis HM7 inoculation under the pollution of heavy metal Mn(5 mmol/L,50 mmol/L,wild Mn slag).Besides,the physiological and biochemical characteristics of the leaves and the effects of the soil environment were observed.The results showed that the biomass,total root length,surface area,crossings,tips,forks and root activity of B.papyrifera with inoculation were higher than those of the uninoculated control group.The inoculation of these two Bacillus spp.increased the absorption of Mn by B.papyrifera and the concentration of Mn in the aerial parts of plants,indicating that the two strains could promote the growth of B.papyrifera and the accumulation of Mn.In addition,microbes reduced MDA content,CAT,SOD,and POD activities in leaves,suggesting that the two Bacillus spp.reduced Mn-induced oxidative stress.The principal component analysis showed that the added Bacillus strain prefer to promote plant root function maintenance and improve soil environment,rather than direct adsorption of heavy metals.These observations indicated that B.cereus HM5 and B.thuringiensis HM7 were valuable microorganisms,which could effectively improve the repair efficiency of B.papyrifera under Mn-contaminated soil.
作者机构：
Guangzhou College of Commerce;Central South University of Forestry and Technology
会议名称：
3rd Guangzhou International Forum on Finance （GZIFF 2020）
会议时间：
2020-11-19
会议地点：
中国广东广州
会议论文集名称：
Proceedings of 3rd Guangzhou International Forum on Finance (GZIFF 2020)
关键词：
Pension Care Service;Social Security System;Institutional Elderly Care
摘要：
Whether the social security system is complete has always been a serious topic that plagues the ruling parties in all countries,and the pension issue is the top priority of the system.A good social pension system is vital to the stability of the country and society.China’s institutional elderly care services have been highly valued and worked hard by successive party and state leaders,and a relatively complete institutional elderly care service system has been formed.
期刊：
MATEC Web of Conferences,2019年275:02014-null ISSN：2261-236X
通讯作者：
Wu, Xi-Zhi
作者机构：
[Zang, Xian-Guo; Wu, Xi-Zhi] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Wu, Xi-Zhi] Yihua Life Sci & Technol Co Ltd, Shantou 515000, Guangdong, Peoples R China.;[Yang, Wei-Kang] Guangzhou Automobile Grp Co Ltd, Res & Design Ctr, Guangzhou 510000, Guangdong, Peoples R China.
通讯机构：
[Wu, Xi-Zhi] C;[Wu, Xi-Zhi] Y;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;Yihua Life Sci & Technol Co Ltd, Shantou 515000, Guangdong, Peoples R China.
会议名称：
1st International Conference on Advances in Civil Engineering and Materials (ACEM) / 1st World Symposium on Sustainable Bio-Composite Materials and Structures (SBMS)
会议时间：
NOV 09-11, 2018
会议地点：
Nanjing Forestry Univ, Nanjing, PEOPLES R CHINA
摘要：
This paper presents fatigue property of CFRP-strengthened cracked steel plate. Firstly, the finite element model of CFRP-strengthened cracked steel plate is established by using the cohesive zone model. With the finite element model, stress intensity factor of the crack-tipis calculated. Then, it gives the fatigue tests of cracked steel plate. According to the experimental data, the material constants <i>C<i/> and <i>n<i/> value sare obtained. The prediction fatigue life is calculated by the finite element model and Paris function and verified by the experimental data. The results show that the prediction fatigue life, calculated by the finite element model and the Paris formula, is consistent with the experimental fatigue life, which verifies the accuracy of our prediction model with finite element model and the Paris function.
