期刊：
Journal of Radioanalytical and Nuclear Chemistry,2014年299(3):1903-1909 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Li, Guangyue; Hu, Nan; Xin, Xin; Fu, Pingkun] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Li, Le] Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Sodium feldspar;U(VI) ion adsorption;Low concentration aqueous solution;Kinetic;Water treatment
摘要：
The raw sodium feldspar (RSF) is activated with the concentrated sulfuric acid solution and the acid activated sodium feldspar (AASF) is obtained. The results obtained from the mercury intrusion method show that the acidification can increase the porosity and the specific surface area. The effects of the initial pH, contact time and ambient temperature on the adsorption of U(VI) ions are investigated in a batch process. The adsorption efficiency amounts to the highest at pH 6 and the adsorption equilibrium is reached in 600 min. The pseudo-second-order model is found to be more suitable for the adsorption process than the pseudo-first-order model and intra-particle model, indicating that the chemical adsorption is the predominant step for the adsorption process. Langmuir model is found to describe the adsorption process better than Freundlich model. This proves that the main form of U(VI) ions attached to RSF and AASF is the monolayer coverage. The thermodynamic parameters prove that the adsorption process is a spontaneous endothermic one. It was also found that acid activated treatment can help increase the adsorption rate and capacity. The results show that RSF and AASF can be used as a novel low cost adsorbent for removal of U(VI) ions from the low concentration aqueous solution.
期刊：
Journal of Nuclear Materials,2014年453(1-3):82-90 ISSN：0022-3115
通讯作者：
Yuan, Yali
作者机构：
[Gao, Yangyang; Tao, Wei; Yuan, Yali; Xu, Wenhui; Li, Yuhui; Ma, Dandan] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Li, Le] Univ South China, Dept Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yuan, Yali] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
摘要：
Magnetic carboxymethylcellulose (CMC/Fe3O4) was used as a framework adsorption material to remove uranium ions from aqueous solutions. Carboxyl functional groups were grafted onto the CMC/Fe3O4. The maximum adsorption capacity of the magnetic composite toward U(VI) was 122.48 mg/g. Kinetic and thermodynamic parameters of the adsorption process were estimated. The pseudo-second-order model was more suitable and it proved to be an endothermic and spontaneous process. The Langmuir and Freundlich models were applied to evaluate the adsorption isotherm. The data matched well with Langmuir model after equilibrium was reached and with Freundlich model before equilibrium was reached.
摘要：
OBJECTIVE: To investigate awareness and knowledge of human papillomavirus (HPV) infection among high school students and to provide a basis for health education on HPV infection for high school students in China. STUDY DESIGN: A ques- awareness of tionnaire on HPV awareness and knowledge was adminis- provide the tered to 900 high school students in Xiangtan City of Hunan Province in China by layer cluster sampling. A total of 848 anonymous valid questionnaires were received from volunteers who cornpleted the questionnaire correctly. RESULTS: Only 10.1% had heard of HPV, and of those only 18.6% knew that HPV could lead to cervical cancer. Single factor analysis indicated that home address, age, grade, academic achievement, sex history, gender, father's education level and mother's education level were impact factors for HPV knowledge of high school students. Multiple regression analysis showed 4 independent risk factors associated with HPV knowledge: academic achievement, sex history, gender, and mother's education level. The limited knowledge came primarily frorri television and radio broadcasts (59.3%), the Internet (57.0%), parents (25.6%), medical workers (20.9%), and teachers (18.6%). CONCLUSION: High school students lack HPV people's knowledge, which is affectand CC can ed by multiple factors. Targeted health education of for targeted all sorts must be provided. Both schools and families are responsible for reinforcing HPV education provided to high school students.
作者机构：
[Yu, M. J.; Tang, S. Y.; Liu, A. Y.; Liu, Y.; Liu, L. Z.; Wan, Y. P.; Zhang, Y.] Univ South China, Pathogen Biol Inst, Hengyang 421001, Peoples R China.;[Li, L.] Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.
通讯机构：
[Tang, S. Y.] U;Univ South China, Pathogen Biol Inst, Hengyang 421001, Peoples R China.
关键词：
human papillomavirus type16 (HPV16);E2;Daxx;interaction
摘要：
The aim of the study was to explore the interactions of human papilloma virus 16 (HPV16) E2 protein and Daxx. The localization or co-localization of PML and E2 with Daxx in Caski cells was observed by indirect immunofluorescence. The interaction of E2 and Daxx was analyzed by co-immunoprecipitation, Western-blot and yeast-two hybrid assays. In Caski cells the fluorescence of Daxx and PML was mainly distributed in the cytoplasm or nucleus, respectively, and in the align image their signals did not overlap. However, when the red signal of HPV16 E2 and the green signal of Daxx in the cytoplasm of Caski cells were merged, the yellow signal appeared. The yeast co-transformed with pGBKT7/Daxx and pGADT7/E2 or pGADT7/E2 TAD can grow on SD/-Trp-Leu-His and SD/-Trp-Leu-His-Ade plates. So Daxx is not colocated with PML but with HPV16 E2 mainly in the cytoplasm of Caski cells. On the base of the results one can propose that HPV16 E2, in particularly its transcription-activity domain (TAD), interacts with Daxx.
摘要：
In order to develop an effective and economical method for removing U(VI) from the low concentration radioactive wastewater with the U(VI) concentration of less than 1 mg L<sup>-1</sup>, the biomass of Aspergillus niger was prepared and modified with ethylenediamine, and the biosorption of uranium from the low concentration radioactive wastewater by the unmodified and the modified biomasses was investigated in a batch system. The modified biomass exhibited the adsorption efficiency of 99.25 % for uranium under the optimum conditions that pH was 5.0, the contact time was 150 min, and the biosorbent dose was 0.2 g L<sup>-1</sup>. The adsorption fitted well to Langmuir isotherm, and the maximum sorption capacity of the modified biomass for U(VI) was determined to be 6.789 mg g<sup>-1</sup> which increased by 36.45 % compared with the unmodified biomass. The adsorption kinetics was better depicted by pseudo-second-order kinetic model. The Gibbs free energy change (ΔG <sup>0</sup>), enthalpy change (ΔH <sup>0</sup>), and entropy change (ΔS <sup>0</sup>) showed that the process of U(VI) adsorption was spontaneous, endothermic, and feasible. The changes in the groups, morphology, and the presence of U(VI) on the surface of the adsorbents which were characterized by FT-IR, SEM, and EDS, demonstrated that the U(VI) was successfully adsorbed onto the modified biomass. Moreover, the UO<inf>2</inf> <sup>2+</sup> absorbed on the modified biomass can be released by 0.1 mol L<sup>-1</sup> HNO<inf>3</inf> with high desorption efficiency of 99.21 %. The results show that the modified biomass can remove U(VI) from low concentration radioactive wastewater more effectively than the unmodified biomass.
