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Adsorptive removal of antibiotics from water using magneticion exchange resin

Journal of Environmental Sciences 2017年第2期29卷 111-117页

作者： Tianyue Wang Xun Pan Weiwei Ben Jianbing Wang pin hou Zhimin Qiang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Enuironmental SciencesChinese Academy of SciencesBeijing 100085China School of Chemical and Enuironmental Engineering Beijing CampusChina University of Mining and TechnologyBeijing 100083China Foreign Economic Cooperation Office Ministry of Environmental ProtectionBeijing 100035China

The occurrence of antibiotics in the environment has recently raised serious concern regarding their potential threat to aquatic ecosystem and human health. In this study, the magnetic ion exchange（MIEX） resin was applied for removing three commonly-used antibiotics, sulfamethoxazole（SMX）, tetracycline（TCN） and amoxicillin（AMX） from *** results of batch experiments show that the maximum adsorption capacities on the MIEX resin for SMX, TCN and AMX were 789.32, 443.18 and 155.15 μg/m L at 25°C,respectively, which were 2–7 times that for the powdered activated carbon. The adsorption kinetics of antibiotics on the MIEX resin could be simulated by the pseudo-second-order model（R^2= 0.99）, and the adsorption isotherm data were well described by the Langmuir model（R^2= 0.97）. Solution p H exhibited a remarkable impact on the adsorption process and the absorbed concentrations of the tested antibiotics were obtained around the neutral p *** MIEX resin could be easily regenerated by 2 mol/L Na Cl solution and maintained high adsorption removal for the tested antibiotics after regeneration. Anion exchange mechanism mainly controlled the adsorption of antibiotic and the formation of hydrogen binding between the antibiotic and resin can also result in the increase of adsorption capacity. The high adsorption capacity, fast adsorption rate and prominent reusability make the MIEX resin a potential adsorbent in the application for removing antibiotics from water.

关键词： Sulfamethoxazole Tetracycline Amoxicillin Antibiotics MIEX resin Adsorption

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Optomechanical properties of a degenera te nonperiodic cavity chain

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Frontiers of physics 2019年第2期14卷 31-38页

作者： Miao-Miao Zhao Zhuo Qian Bang-pin hou Yong Liu Yong-Hong Zhao College of Physics and Electronic Engineering Center for Computational SciencesSichuan Normal UniversityChengdu 610068China State Key Laboratory of Metastable Materials Science and Technology & Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China

The absorption of single-cav计y and double-cavity optomechanical systems and periodic optomechanical lattices has previously been investigated extensively. In this paper, we present the absorption of a nonperiodic cavity chain. where the absorption value on the resonance point shows switchable dips or peaks, according to whether the optomechanical interaction is at an odd or even-numbered position in the chain. Meanwhile, the value of absorption due to the optomechanical interaction varies with the number of the bare cavities. The calculated results may have some novel applications, such as detecting the position of the movable mirror in a long cavity chain, which would be useful in quantum information processing based on optomechanical systems.

关键词： optomechanics optomechanically induced transparency (OMIT)

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microRNA-455-5p alleviates neuroinflammation in cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2022年第8期17卷 1769-1775页

作者： Jian-Song Zhang pin-pin hou Shuai Shao Anatol Manaenko Zhi-Peng Xiao Yan Chen Bing Zhao Feng Jia Xiao-Hua Zhang Qi-Yong Mei Qin Hu Central Laboratory Renji HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Neurosurgery Renji HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina Department of Medical Genetics Shanghai Jiao Tong University School of MedicineShanghaiChina Department of Neurosurgery Changzheng Hospitalthe Second Military Medical UniversityShanghaiChina

Neuroinflammation is a major pathophysiological factor that results in the development of brain injury after cerebral ischemia/*** of microRNA(miR)-455-5p after ischemic stroke has been considered a potential biomarker and therapeutic target for neuronal injury after ***,the role of miR-455-5p in the post-ischemia/reperfusion inflammatory response and the underlying mechanism have not been *** this study,mouse models of cerebral ischemia/reperfusion injury were established by transient occlusion of the middle cerebral artery for 1 hour followed by ***-455-5p,antagomir-455-5p,and their negative controls were injected intracerebroventricularly 2 hours before or 0 and 1 hour after middle cerebral artery occlusion(MCAO).The results showed that cerebral ischemia/reperfusion decreased miR-455-5p expression in the brain tissue and the peripheral ***-455-5p pretreatment increased miR-455-5p expression in the brain tissue,reduced the cerebral infarct volume,and improved neurological ***,primary cultured microglia were exposed to oxygen-glucose deprivation for 3 hours followed by 21 hours of reoxygenation to mimic cerebral ischemia/***-455-5p reduced C-C chemokine receptor type 5 mRNA and protein levels,inhibited microglia activation,and reduced the production of the inflammatory factors tumor necrosis factor-αand interleukin-1β.These results suggest that miR-455-5p is a potential biomarker and therapeutic target for the treatment of cerebral ischemia/reperfusion injury and that it alleviates cerebral ischemia/reperfusion injury by inhibiting C-C chemokine receptor type 5 expression and reducing the neuroinflammatory response.

关键词： agomiR-455-5p biomarker blood-brain barrier C-C chemokine receptor type 5 ischemia/reperfusion injury ischemic stroke microglia microRNA-455-5p neuroinflammation pretreatment

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In situ synchrotron X-ray diffraction analysis of deformation behavior of a Nb/NiTi composite for biomedical applications

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Rare Metals 2021年第3期40卷 600-606页

作者： Shun Guo Rui-Tang Wu Yu-Lu Shi Yan-pin hou Wen Ma Guang-Lei Liu Hai-Xia Liu Xiao-Nong Cheng School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Youke Publishing Co. Ltd.GRINM Group Co.Ltd.Beijing 100088China

The deformation behavior involved in Nb/NiTi composite for biomedical applications within a large macroscopic strain range was investigated by tensile loading-unloading test and in situ synchrotron X-ray diffraction(SXRD).Experimental results show that during loading,the Nb/NiTi composite experiences the elastic elongation of B2-NiTi austenitic,B19’-NiTi martensitic and β-Nb phases,B2→ B19’ stress-induced martensitic(SIM) transformation and tensile plastic deformation of β-Nb *** unloading,the deformation behavior involved in Nb/NiTi composite includes the elastic recovery of B2-NiTi austenitic,B19’-NiTi martensitic and β-Nb phases,reverse phase transformation B19’→B2 and compressive deformation of p-Nb *** martensitic transformation in this composite is almost reversible and occurs in a localized *** results might contribute to a comprehensive understanding of the deformation mechanism involved in Nb/NiTi composite and shed some light on design and development of novel composites with a combination of good biocompatibility and excellent superelasticity for biomedical applications.

关键词： Nb/NiTi composite Deformation behavior Superelasticity Localized martensitic transformation

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Simultaneous cooling of coupled mechanical resonators in cavity optomechanics

Simultaneous cooling of coupled mechanical resonators in cav...

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第十八届全国量子光学学术会议

作者：赖登高 Fen Zou Bang-pin hou Yun-Feng Xiao Jie-Qiao Liao 湖南师范大学 Hunan Normal University

Quantum manipulation of coupled mechanical resonators has become an important research topic in optomechanics because these systems can be used to study the quantum coherence effects involving multiple mechanical modes. A prerequisite for observing macroscopic mechanical coherence is to cool the mechanical resonators to their ground state. Here we propose a theoretical scheme to cool two coupled mechanical resonators by introducing an optomechanical interface. The final mean phonon numbers in the two mechanical resonators are calculated exactly and the results show that the ground-state cooling is achievable in the resolved-sideband regime and under the optimal driving. By adiabatically eliminating the cavity field in the large-decay regime, we obtain analytical results of the cooling limits, which show the smallest achievable phonon numbers and the parameter conditions under which the optimal cooling is achieved. Finally, the scheme is extended to the cooling of a chain of coupled mechanical resonators.

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广州地铁3号线列车空气压缩机机油乳化原因分析及改进措施

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机车电传动 2009年第2期 42-43页

作者：侯品杨广州市地下铁道总公司车辆中心广东广州510380

针对广州地铁3号线列车空气压缩机机油乳化问题调查分析,指出厂家设计失误,导致空压机工作周期不足,并提出改进措施。

关键词：广州地铁 VV120 空压机机油乳化工作周期再生节流阀

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X线检查结合彩色心脏二维多普勒超声对风心病二尖瓣病变术前估计的探讨

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黔南民族医专学报 2000年第2期13卷 6-10页

作者：候平贵州省遵义市遵义医院遵义563002

目的:了解X线结合彩色二维多普勒超声检查对风心病二尖瓣病变术前估计价值。方法:回顾性分析12例风心病二尖瓣病变术前X线结合心脏二维超声检查的临床资料并与术后对比。结果:12例风心病二尖瓣病变手术证实与术前X线结合心脏二维多普勒... 详细信息

目的:了解X线结合彩色二维多普勒超声检查对风心病二尖瓣病变术前估计价值。方法:回顾性分析12例风心病二尖瓣病变术前X线结合心脏二维超声检查的临床资料并与术后对比。结果:12例风心病二尖瓣病变手术证实与术前X线结合心脏二维多普勒超声检查结果一致,而单纯X线检查缺乏直接可靠的依据。结论:风心病二尖瓣病变术前X线结合心脏二维多普勒超声检查对风心病瓣膜病变程度估计及决定手术方式具有指导意义。

关键词： X线超声心动描记术多普勒风湿性心脏病二尖瓣术前估计

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银行外汇衍生品业务实需管理方法研究

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吉林金融研究 2019年第3期 47-50,61页

作者：侯娉中国人民银行济南分行

目前,我国银行办理外汇衍生品业务主要遵循的是实需管理原则。实需原则能够保证具有真实避险业务的主体办理套保业务,促进了我国外汇市场健康有序发展,但随着市场的不断深化、资本项目可兑换和人民币国际化进程的持续推进,当前严格的实... 详细信息

目前,我国银行办理外汇衍生品业务主要遵循的是实需管理原则。实需原则能够保证具有真实避险业务的主体办理套保业务,促进了我国外汇市场健康有序发展,但随着市场的不断深化、资本项目可兑换和人民币国际化进程的持续推进,当前严格的实需管理以及银行的过度把握一定程度上限制了外汇衍生品市场的发展。本文借鉴印度外汇衍生品市场发展经验,从微观及宏观两个方面梳理当前实需管理现状下存在的问题,力求对我国银行外汇衍生品业务实需管理方法做出有效探索。

关键词：外汇衍生品实需管理探讨

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基于ABAQUS旋转防喷器胶芯的非线性有限元分析

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兰州石化职业技术大学学报 2024年第3期24卷 1-8页

作者：田海疆 ISMAIL SAAD YOONG hou pin 王翠凤福建信息职业技术学院智能制造学院福建福州350003 沙巴大学工程学院马来西亚沙巴州亚庇88670

旋转防喷器(RBOP)是欠平衡钻井中必不可少的安全保障设备,其中胶芯是旋转防喷器(RBOP)的关键部件和密封单元,其密封性能决定了旋转防喷器(RBOP)的密封能力。研究了旋转防喷器胶芯的工作机理及故障,依据国家标准和专利建立了胶芯的三维... 详细信息

旋转防喷器(RBOP)是欠平衡钻井中必不可少的安全保障设备,其中胶芯是旋转防喷器(RBOP)的关键部件和密封单元,其密封性能决定了旋转防喷器(RBOP)的密封能力。研究了旋转防喷器胶芯的工作机理及故障,依据国家标准和专利建立了胶芯的三维模型。通过分析研究,选择了适合胶芯材料的本构模型Yeoh模型,通过橡胶材料的单轴拉伸试验所获得的实验数据,使用ABAQUS软件拟合出本构模型的待定系数;在ABAQUS软件中建立钻杆与胶芯接触的三维力学模型,研究计算在不同井压下,钻杆与胶芯之间的接触压力大小和变形情况,得到了不同井口压力下,胶芯密封压力的变化规律——当井口压力逐渐增加时,胶芯内锥面开始发生变形,变形随压力的增加而增大,同时,内锥面和主密封面接触发生应力集中的现象;分析了井口压力为0时,钻杆接头通过胶芯内孔时,胶芯接触压力情况,得到了接触压力在胶芯内锥面各个节点的变化规律,为胶芯的失效分析和设计制造提供了理论依据。

关键词：旋转防喷器有限元分析力学模型胶芯

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三种环境材料及其复合施用对盐碱化土壤的改良效果研究

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农业环境科学学报 2020年第1期39卷 118-124页

作者：金梦野黄娟侯嫔黄占斌中国矿业大学(北京)化学与环境工程学院北京100083 深圳市铁汉生态环境股份有限公司广东深圳518040

为了研发新型有机无机复合材料改良盐碱土壤,采用土柱淋溶模拟实验方法,研究了脱硫石膏、改性腐植酸、高分子材料及其复合材料对盐碱土壤理化性能的改良效果,并探讨了相关材料对盐碱土壤的改良机制。结果表明:与不加任何材料的对照处理(... 详细信息

为了研发新型有机无机复合材料改良盐碱土壤,采用土柱淋溶模拟实验方法,研究了脱硫石膏、改性腐植酸、高分子材料及其复合材料对盐碱土壤理化性能的改良效果,并探讨了相关材料对盐碱土壤的改良机制。结果表明:与不加任何材料的对照处理(CK)相比,脱硫石膏的作用主要是降低盐碱土壤的pH值和土壤钠吸附比(SAR),淋溶后盐碱土壤pH和SAR分别下降了7.46%和37.7%;改性腐植酸的作用是降低盐碱土壤中水溶性盐含量,淋溶后水溶性盐含量较CK降低了64.61%;高分子材料主要作用是增强土壤的保水效果,土壤淋溶液总体积较CK降低了33.1%;三种材料复合处理的淋溶盐碱土壤中大于0.25 mm的土壤团聚体含量增加了20.41%,pH、SAR分别降低0.81%、26.23%。综合评价认为,三种材料复合处理能够在改善盐碱土壤理化性质的同时改良土壤结构,具有较好的综合改良效果。

关键词：盐碱土壤 pH 钠吸附比脱硫石膏环境材料

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