检索结果-南通市图书馆

Synergistic effect of ozonation and ionizing radiation for PVA decomposition

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第8期27卷 63-67页

作者： weihua sun Lujun Chen Yongming Zhang Jianlong Wang College of Life and Environmental Sciences Shanghai Normal University School of Environment Tsinghua University Zhejiang Provincial Key Laboratory of Water Science and Technology Laboratory of Environmental Technology INET Tsinghua University

Ozonation and ionizing radiation are both advanced oxidation processes（AOPs） without chemical addition and secondary pollution. Also, the two processes＇ efficiency is determined by different p H conditions, which creates more possibilities for their combination. Importantly,the combined process of ozonation and ionizing radiation could be suitable for treating wastewaters with extreme p H values, i.e., textile wastewater. To find synergistic effects, the combined process of ozonation and ionizing radiation mineralization was investigated for degradation of polyvinyl alcohol（PVA） at different p H levels. A synergistic effect was found at initial p H in the range 3.0–9.4. When the initial p H was 3.0, the combined process of ozonation and ionizing radiation gave a PVA mineralization degree of 17%. This was 2.7 times the sum achieved by the two individual processes, and factors of 2.1 and 1.7 were achieved at initial p H of7.0 and 9.4, respectively. The combined process of ozonation and ionizing radiation was demonstrated to be a feasible strategy for treatment of PVA-containing wastewater.

关键词： PVA Ozonation Ionizing radiation Synergistic effect Mineralization

Competition for electrons between reductive dechlorination and denitrification

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2017年第6期11卷 129-138页

作者： Lifeng Cao weihua sun Yuting Zhang Shimin Feng Jinyun Dong Yongming Zhang Bruce E. Rittmann Department of Environmental Science and Engineering College of Life and Environmental Science Shanghai Normal University Shanghai 200234 China Biodesign Swette Center for Environmental Biotechnology Arizona State University Tempe AZ 85287-5701 USA

It is common that 2,4,6-trichlorophenol （TCP） coexists with nitrate or nitrite in industrial wastewaters. In this work, simultaneous reductive dechlorination of TCP and denitrification of nitrate or nitrite competed for electron donor, which led to their mutual inhibition. All inhibitions could be relieved to a certain degree by augmenting an organic electron donor, but the impact of the added electron donor was strongest for TCP. For simultaneous reduction ofTCP together with nitrate, TCP＇s removal rate value increased 75% and 150%, respectively, when added glucose was increased from 0.4 mmol· L^-1 to 0.5 mmol· L^-1 and to 0.76 mmol· L^-1 For comparison, the removal rate for nitrate increased by only 25% and 114% for the same added glucose. The relationship between their initial biodegradation rates versus their initial concentrations could be represented well with the Monod model, which quantified their half-maximum-rate concentration （Ks value）, and Ks values for TCP, nitrate, and nitrite were larger with simultaneous reduction than independent reduction. The increases in Ks are further evidence that competition for the electron donor led to mutual inhibition. For bioremediation of wastewater containing TCP and oxidized nitrogen, both reduction reactions should proceed more rapidly if the oxidized nitrogen is nitrite instead of nitrate and if readily biodegradable electron acceptor is augmented.

关键词： Competition for electrons Denitrification Reductive dechlorination Bioremediation Nitrate 2 4 6-trichlorophenol

Atomic mobilities and diffusivities in Al alloys

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2012年第2期55卷 306-328页

作者： DU Yong ZHANG LiJun CUI SenLin ZHAO DongDong LIU DanDan ZHANG WeiBin sun weihua JIE WanQi State Key Laboratory for Powder Metallurgy Central South UniversityChangsha 410083China Interdisciplinary Centre for Advanced Materials Simulation Ruhr-Universitat BochumBochumGermany State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

Knowledge of diffusivity is a prerequisite for understanding many scientific and technological disciplines. In this paper, firstly major experimental methods, which are employed to provide various diffusivity data, are briefly described. Secondly, the fun-damentals of various computational methods, including first-principles method, embedded atomic method/molecular dynamic simulation, semi-empirical approaches, and phenomenological DICTRA technique, are demonstrated. Diffusion models re- cently developed for order/disorder transitions and stoichiometric compounds are also briefly depicted. Thirdly, a newly estab- lished diffusivity database for liquid, fcc_A1, Lie, bcc_A2, bcc_B2, and interrnetallic phases in the multicomponent A1 alloys is presented via a few case studies in binary, ternary and quaternary systems. And the integration of various computational techniques and experimental methods is highlighted. The reliability of this diffusivity database is validated by comparing the calculated and measured concentration profiles, diffusion paths, and Kirkendall shifts in various binary, ternary and quaternary diffusion couples. Next, the established diffusivity databases along with thermodynamic and other thermo-physical properties are utilized to simulate the microstructural evolution for Al alloys during solidification, interdiffusion and precipitation. A spe- cial discussion is presented on the phase-field simulation of interdiffusion microstructures in a series of Ni-Al diffusion couples composed of γ, γ＇, and β phases under the effects of both coherent strain and external compressive force. Future orientations in the establishment of next generation of diffusivity database are finally addressed.

关键词： AI alloys kinetics atomic mobilities diffusion DICTRA first-principles calculation phase-field simulation

NK cells in immunotolerant organs

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2013年第3期10卷 202-212页

作者： Haoyu sun Cheng sun Zhigang Tian weihua Xiao Institute of Immunology School of Life Sciences University of Science and Technology of China Hefei China

Organs such as the liver, uterus and lung possess hallmark immunotolerant features, making these organs important for sustaining self-homeostasis. These organs contain a relatively large amount of negative regulatory immune cells, which are believed to take part in the regulation of immune responses. Because natural killer cells constitute a large proportion of all lymphocytes in these organs, increasing attention has been given to the roles that these cells play in maintaining immunotolerance. Here, we review the distribution, differentiation, phenotypic features and functional features of natural killer cells in these immunotolerant organs, in addition to the influence of local microenvironments on these cells and how these factors contribute to organ-specific diseases.

关键词： immunotolerance liver lung natural killer cell uterus

Inhibition of hepatitis B virus replication by quercetin in human hepatoma cell lines

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Virologica Sinica 2015年第4期30卷 261-268页

作者： Zhikui Cheng Ge sun Wei Guo Yayun Huang weihua sun Fei Zhao Kanghong Hu State Key Laboratory of Virology Wuhan Institute of Virology Chinese Academy of Sciences Sino-Germany Biomedical Center Hubei University of Technology Department of Infectious Disease and Institute of Infectious Disease Tongji Hospital of Tongji Medical College Huazhong University of Science and Technology

Hepatitis B virus(HBV) infection is one of the most serious and prevalent viral diseases in the world. Although several anti-HBV drugs have been used clinically, their side and adverse effects limit treatment efficacy. Therefore, it is necessary to identify novel potential anti-HBV agents. The flavonol quercetin has shown activity against some retroviruses, but its effect on HBV remains unclear. In the present study, quercetin was incubated with Hep G2.2.15 cells, as well as Hu H-7 cells transfected with an HBV plasmid. Quercetin was shown to significantly reduce Hepatitis B surface antigen(HBs Ag) and Hepatitis B e antigen(HBe Ag), secretion and HBV genomic DNA levels in both cell lines. In addition, co-incubation with lamivudine(3TC), entecavir(ETV), or adefovir(Ade) further enhanced the quercetin-induced inhibition of HBV replication. This inhibition was partially associated with decreased heat shock proteins and HBV transcription levels. The results indicate that quercetin inhibited HBV antigen secretion and genome replication in human hepatoma cell lines, which suggests that quercetin may be a potentially effective anti-HBV agent.

关键词： hepatitis B virus(HBV) quercetin flavonol antivira

The effect of pre-low-dose X-ray radiation on tumor inhibition of HepG2 cells in tumor-bearing nude mice

在线全文

学校读者我要写书评

暂无评论

The Chinese-German Journal of Clinical Oncology 2012年第6期11卷 340-343页

作者： weihua sun Hongsheng Yu Qingjun Shang Department of Oncology The Affiliated Hospital of Medical College Qingdao UnivercityQingdao 266000China

Objective:The aim of this study was to discuss the effect of pre-low-dose X-ray radiation on P53,Bcl-2 and apoptosis of HepG2 cells in tumor-bearing nude mouse,and further explore the mechanism of low doses ***:HepG2 cells were implanted subcutaneously into nude mice.14 days after the implanting,these mice were divided into 6 groups randomly,S group (sham-irradiation 0 cGy),D1 group (7.5 cGy,dosage rate=7.5 cGy/min),D2 group,(200 cGy,dosage rate=100 cGy/min),D1 + 2 h + D2 group,D1 + 6 h + D2 group and D1 + 12 h + D2 ***-bearing mice in each experimental group were executed at 24 h after the last irradiation.P53 and Bcl-2 were detected by immunohistochemical staining,the tumor tissues apoptosis were detected in site (Tunel).Results:Each combined exposure groups (D1 + 2 h + D2 group,D1 + 6 h + D2 group and D1 + 12 h + D2 group) compared with the D2 group,the percentages of positive P53 and Bcl-2 were decreased obviously,and the apoptotic indexs were increased (P < 0.01).Conclusion:Pre-low-dose radiation combined with the conventional radiation can increase the apoptosis of tumor tissues by decreasing the expression of P53 and Bcl-2,it can enhance the anti-tumor effect of conventional radiation,and it can have actual clinical significance on supporting radiotherapy.

关键词： low-close radiation HepG2 apoptosis apoptosis-related proteins Tunel

Co-seismic groundwater-level and temperature changes of the 2011 Mw9. 0 Japan earthquake in Chinese mainland

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2011年第4期2卷 40-45页

作者： Luo Junqiu sun Linli Zhang weihua Li Ming Guo Xizhi Eaarthquake Administration of Hubei Province Wuhan 430071China

Co-seismic groundwater-level and temperature changes caused by the Mw9. 0 Japan earthquake in Chinese mainland are described. The recorded water-level changes were mostly oscillations, with some step decreases mostly in the coastal area of Southeast China and step increases mostly in Northeast China and the North-South Seismic Belt. The water-temperature changes were mainly decrease with slow recovery in Sichuan- Yunnan, South China, and lower reaches of Jiangzhong, and sharp increase followed by sharp decrease, or vice versa, in North China and Northeast China. For wells that showed step changes in both water level and temperature, more showed them in the same direction than in the opposite direction.

关键词： Japan Mw9.0 earthquake co-seismic change groudwater level groundwater temperature

试析师德养成的目标维度——基于《道德情操论》第六卷的分析视角

在线全文

学校读者我要写书评

暂无评论

现代大学教育 2019年第2期35卷 28-35,110页

作者：孙卫华衢州学院教师教育学院

《道德情操论》第六部分中,斯密基于自利与同情的思想基础,以一种严肃、复杂与完整的方式探寻美德的品质构成。基于教师自利的本性,"立己之德"是对于教师自然的德性要求;基于教师同情的本性,"惠己之德"是对于教师自然的德性要求。在"立... 详细信息

《道德情操论》第六部分中,斯密基于自利与同情的思想基础,以一种严肃、复杂与完整的方式探寻美德的品质构成。基于教师自利的本性,"立己之德"是对于教师自然的德性要求;基于教师同情的本性,"惠己之德"是对于教师自然的德性要求。在"立己之德"的关照之下,师德养成的具体目标应当包涵真诚之德、本分之德和勤勉之德;在"惠己之德"的关照之下,师德养成的具体目标应当包涵爱生之德、感恩之德和爱国之德。

关键词：《道德情操论》自利同情师德师德养成目标

亚当·斯密的“合宜勇敢”及其对高校德育的启示——基于《道德情操论》第六卷第三篇的分析视角

在线全文

学校读者我要写书评

暂无评论

现代大学教育 2022年第4期38卷 55-62页

作者：孙卫华衢州学院教师教育学院衢州324000

在《道德情操论》第六卷第三篇中,斯密以人自身不合宜激情的自我控制为要求,展现了他对“合宜勇敢”的理解。“合宜勇敢”由“克服诱惑的勇敢”“克服愤怒的勇敢”和“克服恐惧的勇敢”构成。其中,“克服诱惑的勇敢”要求高校德育引导... 详细信息

在《道德情操论》第六卷第三篇中,斯密以人自身不合宜激情的自我控制为要求,展现了他对“合宜勇敢”的理解。“合宜勇敢”由“克服诱惑的勇敢”“克服愤怒的勇敢”和“克服恐惧的勇敢”构成。其中,“克服诱惑的勇敢”要求高校德育引导学生享用理性的诱惑,敦促学生拒绝不良的诱惑;“克服愤怒的勇敢”要求高校德育发挥愤怒之于学生个人德性和共同体完善的双重作用;“克服恐惧的勇敢”要求高校德育引导学生树立安全意识,培育学生“克服恐惧的勇敢”品质,并树立正当的勇敢目的。基于斯密的思想,高校德育应当积极关注学生的道德情绪能力,引导学生恪守和发展自身职责或使命。

关键词：亚当·斯密《道德情操论》 “合宜勇敢” “克服诱惑的勇敢” “克服愤怒的勇敢” “克服恐惧的勇敢” 高校德育

维普期刊数据库博看期刊